DEPARTMENT OF THE INTERIOR John Barton Payne, Secretary United States Geological Survey George Otis Smith, Director WATER-SUPPLY Paper 447 SURFACE WATER SUPPLY OF THE PACIFIC SLOPE OF SOUTHERN CALIFORNIA BY H. D. McGLASHAN Prepared In cooperation with THE STATE OP CALIFORNIA WASHINGTON GOVERNMENT PRINTING OFFICE 1921 Qass Book- .rsrjs s* DEPARTMENT OF THE INTERIOR John Barton Payne, Secretary United States Geological Survey George Otis Smith, Director Water-Supply Paper 447 SURFACE WATER SUPPLY PACIFIC SLOPE OF SOUTHERN CALIFORNIA H. D. McGLASHAN Prepared in cooperation with THE STATE OF CALIFORNU WASHINGTON GOVEBNMENT PRINTING OFFICE 1921 LIBRARY OF CONGRESS CONTENTS. Introduction 9 Investigations of stream flow in California 10 Cooperation and acknowledgments 11 Definition of terms 13 Explanation of data 14 Conditions at gaging stations in southern California 15 Accuracy and reliability of field data and computed records 17 Convenient equivalents 18 Gaging stations 20 Tia Juana River basin 22 General features 22 Gaging-station records 23 Tia Juana River near Nestor, Calif 23 Cottonwood Creek near Dulzura, Calif 24 Pine Valley Creek near Dulzura, Calif 36 Dulzura conduit near Dulzura, Calif 39 Miscellaneous measurements. 43 Sweetwater River basin , 44 General features 44 Gaging-station records .....■..■.....:..:.,..; 44 Sweetwater River near Descanso, Calif. 44 Sweetwater River near Dehesaj Calif. 54 Sweetwater River at Sweetwater "reservoir, Calif 57 Miscellaneous measurements 58 San Diego River basin 58 General features 58 Gaging-station records 59 San Diego River at diverting dam near Lakeside, Calif 59 San Diego River at Lakeside, Calif 65 San Diego River near Santee, Calif 79 San Diego River at San Diego, Calif 83 Boulder Creek near Julian, Calif 86 Boulder Creek near Lakeside, Calif 90 Cuyamaca Water Co. 's flume at diverting dam near Lakeside, Calif. . . 93 Cuyamaca Water Co. 's flume near Lakeside, Calif 99 South Fork of San Diego River near Alpine, Calif 108 South Fork of Cuyamaca Water Co. 's flume near Alpine, Calif 110 . San Vicente Creek at Foster, Calif 113 Miscellaneous measurements 114 San Dieguito River basin 116 General features 116 Gaging-station records 116 Santa Ysabel Creek near Santa Ysabel, Calif 116 Santa Ysabel Creek near Mesa Grande, Calif 118 3 4 CONTENTS. San Dieguito River basin — Continued. Gaging-station records — Continued. Page. Santa Ysabel Creek near Ramona, Calif 125 Santa Ysabel Creek near Escondido, Calif. 133 San Dieguito River at Bernardo, Calif 140 San Dieguito River near Bernardo, Calif 143 San Dieguito River near Del Mar, Calif 146 Black Canyon Creek near Mesa Grande, Calif 148 Temescal Creek near Almond, Calif 151 East San Pasqual ditch near Escondido, Calif 153 Guejito Creek near Escondido, Calif 155 West San Pasqual ditch near Escondido, Calif 157 Santa Maria Creek near Ramona, Calif 159 Miscellaneous measurements 165 Escondido Creek basin 165 San Luis Rev River basin 165 General features 165 Gaging-station records 166 San Luis Rey River near Warner Springs, Calif 166 San Luis Rey River near Mesa Grande, Calif 170 San Luis Rey River at diversion flume, Calif 178 San Luis Rey River near Nellie, Calif 180 San Luis Rey River near Pala, Calif 182 San Luis Rey River at Pala, Calif 191 San Luis Rey River at Bonsall, Calif 192 San Luis Rey River near Bonsall, Calif 196 San Luis Rey River near Oceanside, Calif 199 San Luis Rey River at Oceanside, Calif 201 Canada Verde Creek near Warner Springs, Calif 202 Agua Caliente Creek near Warner Springs, Calif 202 West Fork of San Luis Rey River near Warner Springs, Calif 203 Matagual Creek near Warner Springs, Calif 206 Carrizo Creek near Warner Springs, Calif 209 Susanna Creek near Warner Springs, Calif 212 Escondido Mutual Water Co. 's canal near Nellie, Calif 215 Rincon Indian Reservation ditch near Valley Center, Calif 226 Pala Indian Reservation canal at Pala, Calif 226 San Luis Rey ditch near San Luis Rey, Calif 228 Miscellaneous measurements 229 Santa Margarita River basin 233 General features 233 Gaging-station records 233 Temecula Creek near Temecula, Calif 233 Miscellaneous measurements 234 Santa Ana River basin - , 235 General features 235 Gaging-station records 236 Santa Ana River near Mentone, Calif 236 Southern California Edison Co. 's canal and Greenspot pipe line near Mentone, Calif 262 Mill Creek in canyon at head works of Crafton canal, Calif 280 Mill Creek at Forest Home, Calif 285 Highlands canal near Mentone, Calif 295 Redlands canal near Mentone, Calif 297 CONTENTS. O Santa Ana River basin — Continued. Gaging-station records— Continued. Page. Waterman Canyon Creek near San Bernardino, Calif ^ - 299 Devil Canyon Creek near San Bernardino, Calif 302 Lytle Creek at mouth of canyon near Rialto, Calif 304 Lytle Creek near San Bernardino, Calif 309 San Jacinto River near Elsinore, Calif 318 Elsinore Lake at Elsinore, Calif 321 Temescal Creek near Elsinore, Calif 324 Temescal Creek near Rincon, Calif 326 San Antonio Creek near Claremont, Calif 327 San Antonio Creek near Upland, Calif 331 Miscellaneous measurements of San Antonio Creek 342 Southern California Edison Co.'s canal near Claremont, Calif 346 Chino Creek at Rincon 348 Cucamonga Creek 349 Miscellaneous measurements 350 Water absorbed in sands and gravel 360 Return waters in San Bernardino County 361 San Gabriel River basin 371 General features 371 Gaging-station records 373 San Gabriel River above Fish Fork, near Azusa. Calif 373 San Gabriel River at head works near Azusa, Calif 374 San Gabriel River near Azusa, Calif 375 Fish Fork of San Gabriel River near Azusa, Calif 402 Iron Fork of San Gabriel River near Azusa, Calif 403 Coldwater Creek above mouth, Calif 404 West Fork of San Gabriel River above North Fork, Calif 405 West and North branches of North Fork of San Gabriel River at weir, Calif 405 Southern California Edison Co. 's canal near Azusa, Calif 406 Tunnel diversion near Azusa, Calif 420 Rogers Creek near Azusa, Calif 421 San Dimas Creek near San Dimas, Calif 422 Fish Creek near Duarte, Calif 425 Sawpit Creek near Monrovia, Calif 427 Monrovia pipe line near Monrovia, Calif 430 Miscellaneous measurements 433 Water absorbed in sands and gravel 438 Los Angeles River basin 439 General features 439 Records of measui'ement 440 Los Angeles River at the Narrows, Calif 440 Diversions from Los Angeles River 448 Pacoima Creek near San Fernando, Calif 449 Tujunga Creek near Sunland, Calif 452 Haines Creek near Tujunga, Calif 455 Arroyo Seco near Pasadena, Calif 457 Eaton Creek near Pasadena, Calif 464 Santa Anita Creek near Sierra Madre, Calif 466 Little Santa Anita Creek near Sierra Madra, Calif 468 Miscellaneous measurements 471 Water absorbed in sands and gravel 475 b CONTENTS. Page. Malibu Creek basin 476 General features 476 Gaging-station records 476 Malibu Creek near Calabasas, Calif 476 Triunfo Creek near Calabasas, Calif 480 Santa Clara River basin 482 General features 482 Gaging-station records 483 Santa Clara River at Fillmore, Calif 483 Piru Creek near Piru, Calif 484 Sespe Creek near Sespe, Calif 487 Sespe Creek at Sespe, Calif 490 Santa Paula Creek near Santa Paula, Calif 492 Miscellaneous measurements 495 Ventura River basin 498 General features 498 Gaging-station records 498 Ventura River near Nordhoff, Calif 498 Ventura River near Ventura, Calif 501 Miscellaneous measurements 504 Streamflow from minor drainage basins in Santa Barbara County 505 Carpinteria Creek basin 505 Gobernador Creek near Carpinteria. Calif 505 Diversion from Gobernador Creek near Carpinteria, Calif 507 Mission tunnel near Santa Barbara, Calif 508 San Roqui Creek 508 San Jose Creek near Goleta, Calif 509 Loma Abajo River 511 Gato Creek 511 Santa Ynez River basin 51? General features 512 Gaging-station records 513 Santa Ynez River near Santa Barbara, Calif 513 Santa Ynez River near Lompoc, Calif 527 Mono Creek near Santa Barbara, Calif 536 Miscellaneous measurements 538 Miscellaneous measurements of streams in Santa Barbara County 539 Santa Maria River basin 540 General features 540 Gaging-station records 541 Santa Maria River near Santa Maria, Calif 541 Miscellaneous measurements 542 Floods 543 Records of floods 543 Flood of 1914 - 544 Flood of 1891 549 Index 551 ILLUSTRATIONS. Page. Plate I. Map of a part of southern California, showing location of gaging stations in Pacific slope drainage basins In pocket. II. Map of a part of southern California, showing location of gaging stations in Pacific slope drainage basins In pocket. III. A, Price current meters ; B, Typical gaging station 14 IV. Water-stage recorders: A. Stevens continuous; B, Gurley printing; C, Friez 15 V. Concrete controls: A, San Luis Rey River near Pala, Calif.; B, Sweetwater River near Dehesa, Calif. ; C, Santa Ysabel Creek near Ramona, Calif 16 VI. J., Control of concrete and solid rock on Santa Ysabel Creek near Mesa Grande, Calif.; B, Concrete control on Sweetwater River near Descanso, Calif.; C, Wading measurement on San Gabriel River near Azusa, Calif 17 VII. A, Sweetwater dam, September 17, 1918; B, Lake Hodges dam, San Dieguito River 44 VIII. Murray dam. March 9, 1918; J., Upstream side; -B, Downstream side. . . 45 IX. Gaging stations: A, San Diego River at diverting dam, near Lakeside, Calif.; B, Cuyamaca W^ater Co.'s flume at diverting dam, near Lakeside, Calif.; C, Cuyamaca Water Co.'s flume at Los Coches Creek, near Lakeside, Calif 60 X. Gaging stations: A, Santa Maria Creek near Ramona, Calif.; B, Santa Ana River near Mentone, Calif., showing vertical staff gage; C, Tunnel diversion near Azusa, Calif. , showing weir 61 XI. Well and house for water-stage recorders: A, Santa Ana River near Mentone, Calif.; B, Rogers Creek near Azusa, Calif.; C, Santa Anita Creek near Sierra Madre, Calif 236 XII. Concrete well and house for water-stage recorders: A, San Dimas Creek near San Dimas, Calif.; B, C, San Gabriel River near Azusa, Calif 237 XIII. Concrete well and house for water-stage recorders: A, Rogers Creek near Azusa, Calif. ; jB, Fish Creek near Duarte, Calif. ; C, Little Santa Anita Creek near Sierra Madre, Calif 422 XIV. A, Concrete well and shelter on Sawpit Creek near Monrovia, Calif.; B, Double concrete-boulder control on Eaton Creek near Pasa- dena, Calif.; C, Concrete well, house, and control on Arroyo Seco near Pasadena, Calif 423 XV. Concrete well, house, and control: A, Pacoima Creek near San Fernando, Calif.; B, Tujunga Creek, near Sunland, Calif.; C, Haines Creek near Tujunga, Calif 450 XVI. A, Waterman Canyon Creek near San Bernardino, Calif., showing gravel and sand deposited by first high water after forest fire; B, Foundation for Gibraltar dam, on Santa Ynez River near Santa Barbara, Calif. ; C, Cable section on Santa Ynez River near Santa Barbara, Calif 451 XVII. Views after flood of 1914: A, Arroyo Seco near Los Angeles, Calif.; B, Ventura River near Ventura, Calif.; C, Santa Paula Creek near Santa Paula, Calif 492 XVIII. A, San Diego River at Mission dam, near Santee, Calif., after flood of 1916; B, Gaging station on Cottonwood Creek near Dulzura, Calif. ; C, Dulzura conduit at Barrett dam site, Calif 493 7 SURFACE WATER SUPPLY OF THE PACIFIC SLOPE OF SOUTHERN CALIFORNIA. By H. D. McGlashan. INTRODUCTION. Since 1848, when repairs to a mill race near Georgetown, Eldorado County, led to the discovery of gold in California, the industrial development of the State has been closeb linked with the develop- ment and utilization of its water resourcr Information concerning the quantity of water carried by the "*''' .ims has been and will con- tinue to be essential to the developric^nt of these resources, for the fundamental importance of stream-flow data is now so thoroughly recognized that it is almost impossible to finance any project de- pending on stream flow without presenting authentic records of flow covering a period of years. On account of the pronounced differences in natural conditions — especially as regards topography, geologic formations, forests, and climate — stream-measurement work in southern California presents many problems not common to similar work in the central and northern parts of the State. The rock formations have been badly shattered by extensive fault- ing and thus furnish great quantities of boulders. The soil is very porous and is easily eroded. The main drainage channels are com- paratively short and in the mountainous sections have very steep slopes, so that during periods of high run-off the streams have excessive velocities. An interesting example is furnished by San Gabriel River, whose source is about 10,000 feet above sea level and whose mouth is approximately 50 miles distant in an air line. The maximum ob- served velocity for the measurement of San Gabriel River near Azusa on January 19, 1916, was 30 feet per second, and the mean velocity for the measurement was 22.2 feet. These high velocities produce marked changes in cross sections of channels at gaging stations. The stream channels, even in the canyons, are unstable, and they scour and fill with unfailing regularity whenever there is a sudden change in run-off. The stream beds in the canyons are composed mainly of gravel and boulders, the size of the material depending on the slope of the channel. At the mouths of the canyons ^here are well-defined debris cones, where the larger part of the rolling debris is deposited. The stream channels from the debris cones to the sea 10 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. are cut through fine gravels or soils of sandy loam and are subject to alluvial and erosional stream action which results in continual shifting and changing within the channel and, during floods, even in shifting of the channels themselves. Except at the highest elevations the vegetation consists chiefly of brush interspersed with the usual growth found in similar arid regions. During the long dry seasons lightning and careless campers are the cause of many fires, which are, however, usually held in control by the efficient fire patrol of the United States Forest Service. Occa- sionally a fire gets beyond immediate control and burns over a small drainage basin. As a result the first heavy rainfall washes into the channels of the small streams much sand and fine gravel, at times filling them to the level of their banks with this material, which is gradually eroded after the flood stage has passed. (See PL XVI, Aj p. 451.) In this region there are two seasons — the rainy and the dry. The rainy season usually covers less than half the year, and the greater part of the rainfall occurs during the heavy storms that affect com- paratively small areas. As a rule flood stages last only for short periods. ^ INVESTIGATIONS OF STREAM FLOW IN CALIFORNIA. The measurement of the flow of streams in California was begun by the California State engineer in 1878, in accordance with a law requiring him ' ' to investigate the problems of the irrigation of the plains, the condition and capacity of the great drainage lines of the State, and the improvement of the navigation of rivers.^' The work was restricted to a few localities in the Sacramento and San Joaquin basins, the principal station being on the Sacramento at Collinsville. The State engineer's office was discontinued in 1884, and practi- cally no further stream studies were made until 1894, when engineers of the United States Geological Survey were sent into California and made a few measurements of streams in the semiarid parts of the State. The following year the Survey established a station on Sac- ramento River at Red Bluff and since that time it has gradually ex- tended the work until it now has available records of flow at about 500 stations on California streams. Many records have also been collected by private persons. The first stations were located only on streams whose waters were to be used for irrigation, but records are now available on streams adapted to all uses, including navigation, domestic water supply, and power. The investigations of the quantity of water in the streams have been supplemented by studies of the climatic and other conditions 1 Records of precipitation for 106 stations in San Diego County, covering periods varying from 1 year to 65 years, are presented in connection with a discussion of the ground waters of the western part of the county by A. J. Ellis and C. H. Lee, published by the U. S. Geological Survey as Water-Supply Paper 44& COOPERATION AND ACKNOWLEDGMENTS. 11 affecting stream flow, and a mass of valuable information has thus been collected affording data for all phases of hydraulic work. The stream-flow records collected by the Survey and cooperating parties up to the end of June, 1912, were assembled and published in 1912 and 1913 as three water-supply papers bearing titles as follows : 298. Water resources of California, Part I, Stream measurements in Sacramento River basin. 299. Water resources of California, Part II, Stream measurements in San Joaquin River basin. 300. Water resources of California, Part III, Stream measurements in Great Basin and Pacific coast river basins. The records for the Pacific slope of southern California, including those published in Water-Supply Paper 300 and records collected up to September 30, 1918, are presented in this report. ' The area covered and the location of the gaging stations maintained are shown on the topographic maps forming Plates I and II (in pocket) . COOPERATION AND ACKNOWLEDGMENTS. Cooperation in stream measurements between the United States Geological Survey and State of California was first provided for by the State legislature in an act approved March 16, 1903. This act covered the period from July 3, 1903, to June 30, 1905, and was in sub- stance as follows: The State Board of Examiners are hereby empowered to enter into contracts with the Director of the United States Geological Survey for the purpose of making topo- graphic maps to the extent of twenty thousand dollars ; also for the purpose of gaging streams; surveying reservoir sites and canal locations, for the conservation and utili- zation of the flood and storm waters of the State, to the extent of fifteen thousand dollars. * * * Similar acts, approved March 20, 1905, and March 11, 1907, provided for the continuation of the work until June 30, 1909, with an increased biennial appropriation of $30,000 for topography and $20,000 for hydrography. The act of March 11, 1907, named the Department of Engineering of the State of California as the cooperat- ing party. An act placing cooperation between the State of California and the United States Geological Survey on a permanent basis was approved April 22, 1909, and provided as follows: The Department of Engineering is hereby empowered to carry on topographic surveys and investigations into matters pertaining to the water resources of the State along the lines of hydrography, hydro-economics and the use and distribution of water for agricultural purposes, and to that end, where possible and to the best interest of the State, shall enter into contracts for cooperation with the different departments of the Federal Government in such amounts as may be an equitable and necessary division of the work. The State engineer, with the consent of the governor, may maintain and continue such investigations where there is available money not covered by 12 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. cooperation contract. For the permanent maintenance of said surveys and investiga- tions there is hereby continuously appropriated out of the general fund of the State treasury for each and every fiscal year, commencing with the date upon which this act becomes effective, the sum of thirty thousand dollars. Of this sum $9,000 is allotted annually to investigations of water resources. In 1911 the California Legislature provided for a State Board of Control (Water Powers) to pass on matters pertaining to the appro- priation of water for power development, and for a Conservation Com- mission to investigate and collect information concerning forestry, water, and other natural resources and their use, for the purpose of revising the laws of the State relating thereto. The legislature of 1912 transferred the duties of the State Board of Control (Water Powers) to the State Water Commission. The members of the Conservation Commission were George C. Par- dee, chairman; Francis Cuttle, and J. P. Baumgarten; of the State Water Commission, Hiram W. Johnson, governor; Charles D. Marx, chairman; S. C. Graham; Harold T. Power; and W. F. McClure, State engineer. Louis R. Glavis was appointed secretary of both com- missions and was later succeeded by Josephine A. Patten. These commissions made substantial appropriations for stream-gaging work in cooperation with the Geological Survey, and as a result a large number of new river-measurement stations were established and old stations were improved. In the present work the State of California is represented by the Department of Engineering, State of California, W. F. McClure, State engineer, and the State Water Commission. The members of this commission are William D. Stephens, governor (ex officio); W. F. McClure, State engineer (ex officio) ; A. E. Chandler, president; W. A. Johnstone; and Irving Martin. Josephine A. Patten is secretary. The United States Forest Service, United States Weather Bureau, United States Indian Office, Los Angeles County, the cities of San Diego and Santa Barbara, the Sweetwater Water Co., the Cuyamaca Water Co., and the Voloan Land & Water Co. have also cooperated, and assistance has been rendered and many complete records of stream flow furnished by other companies and private persons to whom credit is given in connection with the published data. The earliest stream-gaging work in the State, beginning in 1878, was carried on under the direction of William Ham. Hall, State engi- neer, by A. Boschke and other assistant engineers, among whom was C. E. Grunsky, who continued in charge of office computation and frequently acted as hydrographer until the State Engineer's Depart- ment was abolished. Work by the United States Geological Survey was begun in 1894, under the direction of F. H. Newell, chief hydrog- rapher, by Arthur P. Davis, and Joseph B. Lippincott. On the establishment of the United States Reclamation Service in 1902, Mr. DEFINITION OF TERMS. 13 Lippincott became supervising engineer for California, and the field work was continued under his direction by William B. Clapp and Samuel G. Bennett, until the separation of the Reclamation Service from the Geological Survey in 1906, when Mr. Clapp became district engineer. On Mr. Clapp's death in December, 1911, H. D. McGlashan was appointed district engineer. DEFINITION OF TERMS. The volume of water flowing in a stream — the '^run-off" or '^ dis- charge" — is expressed in various terms, each of which has become associated with a certain class of work. These terms may be divided into two groups — (1) those that represent a rate of flow, as second- feet, gallons per minute, miner's inches, and discharge in second-feet per square mile, and (2) those that represent the actual quantity water, as run-off in depth in inches, acre-feet, and millions of cubic feet. The principal terms used in this report are second-feet, second- feet per square mile, run-off in inches, and acre-feet. They may be defined as follows : ''Second-feet" is an abbreviation for ''cubi-c feet per second." A second-foot is the rate of discharge of water flowing in a channel of rectangular cross section 1 foot wide and 1 foot deep at an average velocity of 1 foot per second. It is generally used as a fundamental unit from which others are computed by the use of the factors given in the tables of convenient equivalents (p. 18). ''Second-feet per square mile" is the average number of cubic feet of water flowing per second from each square mile of area drained, on the assumption that the run-off is distributed uniformly both as regards time and area. ''Run-off (depth in inches)" is the depth to which an area would be covered if all the water flowing from it in a given period were uniformly distributed on the surface. It is used for comparing run- oft' with rainfall, which is usually expressed in depth in inches. An "acre-foot," equivalent to 43,560 cubic feet, is the quantity required to cover an acre to the depth of 1 foot. The term is com- monly used in connection with storage. "Miner's inch" represents a rate of flow and varies in different States, as noted in the table of convenient equivalents (p. 19). In California it was legalized by an act approved March 23, 1901, as one-fortieth of a second-foot. Prior to the passage of this act the common usage was one-fiftieth of a second-foot. The act reads as follows : Section 1. The standard miner's inch of water shall be equivalent or equal to li cubic feet of water per minute, measured through any aperture or orifice. Sec. 2. All acts or parts of acts inconsistent with the provisions of this act are hereby repealed. Sec. 3. This act shall be in effect and force sixty days from and after its passage. 14 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. One-fiftieth of a second-foot is still generally used in southern California. The following terms not in common use are here defined: ''Stage-discharge relation," an abbreviation for the term ''relation of gage height to discharge. "Control," a term used to designate the natural section or stretch of the channel, or artificial structure below the gage that determines the stage-discharge relation at the gage. It should be noted that the control may not be the same section or sections at all stages. (See Pis. V and VI.) The "point of zero flow" for a gaging station is that point on the gage — the gage height — at which water ceases to flow over control. EXPLANATION OF DATA. The data presented in this report cover the climatic or water year beginning October 1 and ending September 30. At the 1st of Jan- uary in most parts of the United States much of the precipitation in the preceding three months is stored as ground water, in the form of snow, or in ponds, lakes, and swamps, and this stored water passes off in the streams during the spring break-up ; at the end of Septem- ber, on the other hand, the only stored water available for run-off is possibly a small quantity in the ground ; therefore the run-off for a year beginning October 1 is practically all derived from precipitation in that year. The base data collected at gaging stations (PI. Ill, B) consist of records of stage, measurements of discharge, and general information used to supplement the gage heights and discharge measurements in determining the daily flow. The records of stage are obtained either from direct readings on a staff gage or from a water-stage recorder (PI. IV) that gives a continuous record of the fluctuations. Measure- ments of discharge are made with a current meter which is operated from a bridge, a car suspended on a cable, or by wading (PL VI? C), the method adopted depending on the conditions at the station. The general methods are outlined in standard textbooks on the measure- ment of river discharge. From the discharge measurements rating tables are prepared that give the discharge for any stage, and these rating tables, when applied to the gage heights, give the daily discharge from which the monthly and yearly mean discharge is determined. The data presented for each gaging station in the area covered by this report comprise a description of the station, a table giving results of discharge measurements, a table showing the daily discharge of the stream, and a table of monthly and yearly discharge and run-off. If the base data are insufficient to determine the daily discharge, tables giving daily gage heights and results of discharge measure- ments are published. U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 447 PLATE III A. PRICE CURRENT METERS. B. TYPICAL GAGING STATION. h'lh'i^i CONDITIONS AT GAGING STATIONS. 15 The description of the station gives, in addition to statements regarding location and equipment, information in regard to any con- ditions that may affect the constancy of the stage-discharge relation, covering such subjects as the shifting of control, and the cause and effect of backwater; it gives also information as to diversions that decrease the flow at the gage, artificial regulation, approximate ele- vation above sea level, maximum and minimum recorded stages, and the accuracy of the records. The table of daily discharge gives the discharge in second-feet corresponding to the mean of the gage heights recorded each day. At stations on streams subject to sudden or rapid diurnal fluctuation the discharge obtained from the rating table and the mean daily gage height may not be the true mean discharge for the day. When such stations are equipped with water-stage recorders, the true mean daily discharge may be obtained by computing the mean daily gage height and applying it to the rating table, by averaging quantities of dis- charge for regular intervals during the day, or by means of a dis- charge integrator — an instrument operating on the principle of the planimeter and containing as an essential element the rating curve of the station. In the table of monthly discharge the column headed ' 'Maximum" gives the mean flow for the day when the mean gage height was highest. As the gage height is the mean for the day it does not in- dicate correctly the stage when the water surface was at crest height and the corresponding discharge was consequently larger than that given in the maximum column. Likewise, in the column headed ' 'Minimum," the quantity given is the mean flow for the day when the mean gage height was lowest. The column headed ''Mean" is the average flow in cubic feet for each second during the month. Computations recorded in the remaining columns are based on this average flow. CONDITIONS AT GAGING STATIONS ON SOUTHERN CALIFORNIA STREAMS. Natural as well as artificial conditions in southern California are very unfavorable for accurate stream gaging. At practically all points where gaging stations have been maintained the stage-dis- charge relation under natural conditions was continually changing. In establishing a gaging station a section of channel as favorable as possible is selected. On many streams the choice is confined to a short stretch on account of the intensive developments already made for power and irrigation. Artificial controls. — In 1912 the first efforts were made to control the stage-discharge relation by artificial means in order to reduce the cost of maintenance of the stations and increase the accuracy of the records. The first experiment was made by driving short sec- 16 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. tions of wooden sheet piling across the channel immediately down- stream from the gage. A control constructed in this way was only temporary, as it was destroyed by the first high water, but it made conditions more stable during low water and indicated that more permanent construction would be justified. The next type of control built consisted of short sections of con- crete cut-off walls placed between large boulders, crossing the chan- nel in a more or less irregular manner. The sharp granite sand con- tinuously flowing over the crest eroded the concrete more rapidly than had been expected. Steel bands or angles, which were later embedded in the crest of the control, made this type of construc- tion fairly successful. The top of a short section of the control near the bank was left a few tenths of a foot lower than the other sections in order to direct the low-water flow past the gage. (See PI. V, A.) On several streams where there were no large boulders in the cross section to anchor the cut-off walls, a concrete weir has been built with a rectangular notch to carry the low-water discharge. (See PI. V, O.) Some of these controls have been protected from gravel and boulders by bolting planks to the upstream or top face of the concrete. (See PI. XII, A and PI. XIV, C.) Further study and experience indicated that certain changes in design were desirable. It was realized that an artificial control should conform as closely as practicable to the natural cross section, so as not to disturb the stream and create new and artificial condi- tions which nature would immediately set about to destroy. This led to a plan for a control projecting but a short distance above the channel and having a concave profile about the same as that of the bed. It eliminated the sharp break in the crest due to the notch for low-water flow and made the stage-discharge relation always sensi- tive to slight changes in discharge. (See PL VI, B.) These controls were usually built of granite boulders of various sizes, bound together with concrete and placed so as to give a triangular cross section with a fairly sharp crest. The use of boulders obtained from the stream bed resulted in greater durability and a slight saving in cost over concrete. Controls built as described above materially improve the per- manence of the stage-discharge relation and make possible the development of rating curves covering periods in v/hich changes in stage are inconsiderable. There is a tendency for sand and gravel to collect immediately above and on each bank. This tendency is especially strong during seasons of comparatively low run-off. It is important that the gage or low-water section be placed close to the upstream side of the control. Experiments are now being made with a double control — that is, two controls separated by a short stretch of channel. It appears that U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 447 PLATE V CONCRETE CONTROLS. A, San Luis Rey River near Ptila, Calif.; B, Sweetwater River near Dehesa, Calif.; C, Santa Ysabel Creek near Ramona, Calif. U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 447 PLATE VI A. CONTROL OF CONCRETE AND SOLID ROCK ON SANTA YSABEL CREEK NEAR MESA GRANDE, CALIF. B. CONCRETE CONTROL ON SWEETWATER RIVER NEAR DESCANSO, CALIF. C. WADING MEASUREMENT ON SAN GABRIEL RIVER NEAR AZUSA, CALIF. ACCURACY OF FIELD DATA. . 17 the upper control accelerates the water, so that it transports the gravel and sand over the lower control, and leaves a well-defined pool in which the gage is placed, (See PL XIV, B.) Water-stage recorders. — On account of the improvement resulting from the construction of artificial controls it has been considered advisable to collect gage-height records at important stations with greater accuracy by installing water-stage recorders (see PI. IV) that give a continuous record of stage. A record of this type is especially valuable during floods, as it not only indicates the time and duration of the maximum stage but furnishes a complete record from which the mean daily discharge may be accurately computed. On account of conditions in the channels previously explained, water-stage recorders could not be installed in the usual manner as shown in Plate III, B. The intake pipe connecting the weU with the stream would fill up with sand and fine gravel during the first rise and thus seal the well. Intake pipes have been eliminated by building the well and shelter flush with or projecting into the stream. A number of small openings at various elevations are left in the stream face of the well and may be cleaned out from the inside as required. In most places the well and shelter must be built of reinforced concrete, in order to withstand floods. A number of types of weUs and shelters have been used in southern California (see Pis. XI-XV). The latest design is shown in Plate XI, A, and Plate XII, B and C. ACCURACY OF FIELD DATA AND COMPUTED RECORDS. The accuracy of stream-flow data depends primarily (1) on the permanence of the stage-discharge relation and (2) on the accuracy of observation of stage, measurements of flow, and interpretation of records. A paragraph in the description of the station or footnotes added to the tables gives information regarding the (1) permanence of the stage-discharge relation, (2) precision with which the discharge rating curve is defined, (3) refinement of gage readings, (4) frequency of gage readings, and (5) methods of applying daily gage heights to the rating table to obtain the daily discharge.^ For the rating tables 'SveU defined" indicates, in general, that the rating is probably accurate within 5 per cent; '' fairly weU defined," within 10 per cent; ''poorly defined," within 15 to 25 per cent. These notes are very general and are based on the plotting of the individual measurements with reference to the mean rating curve. _ The monthly means for any station may represent with high accu- racy the quantity of water flowing past the gage, but the figures showing discharge per square mile and depth of run-off in inches 1 For a more detailed discussion of the accuracy of stream-flow data see Grover, N. C, and Hoyt, J. C. Accuracy of stream-flow data: U. S. Geol. Survey Water-Supply Paper 400, pp 53-59, 1916. 142131°— 21— wsp 447 2 18 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. may be subject to gross errors caused by the inclusion of large non- contributing districts in the measured drainage area, by lack of information concerning water diverted for irrigation or other use, or by inability to interpret the effect of artificial regulation of the flow of the river above the station. ''Second-feet per square mile" and ''run-off (depth in inches)" are therefore not computed if such errors appear probable. The computations are also omitted for stations on streams draining areas in which the annual rainfall is less than 20 inches. All figures representing "second-feet per square mile" and "run-off (depth in inches)" previously published by the Survey should be used with caution because of possible inherent but unknown sources of error. The table of monthly discharge gives only a general idea of the flow at the station and should not be used for other than preliminary estimates; the tables of daily discharge allow more detailed studies of the variation in flow. It should be borne in mind, however, that the observations in each succeeding year may be expected to throw new light on data previously published. CONVENIENT EQUIVALENTS. The following is a list of convenient equivalents for use in hydraulic computations : Table for converting discharge in second-feet per square mile into run-off in depth in inches over the area. Discharge (second- feet per square mile). Run-off (depth in inches). Iday. 28 days. 29 days. 30 days. 31 days. 1 0.03719 .07438 . 11157 . 14876 . 18595 . 22314 . 26033 . 29752 . 33471 1.041 2.083 3.124 4.165 5.207 6.248 7.289 8.331 9.372 1.079 2.157 3.236 4.314 5.393 6.471 7.550 8.628 9.707 1.116 2.231 3.347 4.463 5.578 6.694 7.810 8.926 10.041 1.153 2.306 3.459 4.612 5.764 6.917 8.070 9.293 10. 376 2 3 4. ...... 6 7 . 8 9 Note. — For part of a month multiply the run-off for one day by the number of days. Table for converting discharge in second-feet into run-off in acre-feet. Discharge (second- feet). Run-off in acre-feet Iday. 28 days. 29 days. 30 days. 31 days. 1 1.983 3.967 5.950 7.934 9.917 11.90 13.88 15.87 17.85 55.54 111.1 166.6 222.1 277.7 333.2 388.8 444.3 499.8 57.52 115.1 172.6 230.1 287.6 345.1 402.6 460.2 517.7 59.50 119.0 178.5 238.0 297.5 357.0 416.5 476.0 535.4 61.49 123.0 184.5 246.0 307.4 368.9 430.4 491.9 553.4 2 3 4 5 6 7 8 9 Note.— For part of a month multiply the run-off for one day by the number of days. CONVEIiriENT EQUIVALENTS. 19 Table for converting discharge in second-feet into run-off in millions of cubic feet. Discharge (second- feet). Run-ofE in millions of cubic feet. Iday. 28 days. 29 days. 30 days. 31 days. 1 0.0864 .1728 .2592 .3456 .4320 .5184 .6048 .6912 .7776 2.419 4.838 7.257 9.676 12.10 14.61 16.93 19.35 21.77 2.506 5.012 7.518 10.02 12.53 15.04 17.54 20.05 22.55 2.592 5.184 7.776 10.37 12.96 15.55 18.14 20.74 23.33 2.678 5.356 8.034 10.71 13.39 16.07 18.75 21.42 24.10 2 3 - - 4 5 6 7 8 9 Note.— For part of a month multiply the run-o£E for one day by the number of days. Table for converting discharge in second feet into run-off in millions of gallons. Discharge (second- feet). Run-off (millions of gallons). 1 day. 28 days. 29 days. 30 days. 31 days. 1 0.6463 1.293 1.939 2.585 3.232 3.878 4.624 5.171 5.817 18.10 36.20 54.30 72.40 90.50 108.6 126.7 144.8 162.9 18.74 37.48 56.22 74.96 93.70 112.4 131.2 149.9 168.7 19. 39 38.78 58.17 77.56 96.95 116.3 135.7 155. 1 174 5 20.04 40.08 60.12 80.16 100.2 120.2 140.3 160.3 180.4 2 3 4 5 6 7 8 9 Note. — For part of a month multiply the run-off for 1 day by the number of days. Table for converting velocity in feet 'per second into velocity in miles jper hour. [1 foot persecond=0.681818 mile per hour, or two-thirds mile per hour, verynearly; 1 mile per hour =1.'^ feet per second. In computing the table the values 0.68182 and 1.4667 were used.] Feet per second Miles per hour for tenths of foot per second. (units). 1 2 3 4 5 6 7 8 9 0.000 .682 1.36 2.05 2.73 3.41 4.09 4.77 5.45 6.14 0.068 .750 1.43 2.11 2.80 3.48 4.16 4.84 5.52 6.20 0.136 .818 1.50 2.18 2.86 3.55 4.23 4.91 5.59 6.27 0.205 .886 1.57 2.25 2.93 3.61 4.30 4.98 5.66 6.34 0.273 .995 1.64 2.32 3.00 3.68 4.36 5.05 5.73 6.41 0.341 1.02 1.70 2.39 3.07 3.75 4.43 6.11 5.80 6.48 0.409 1.09 1.77 2.45 3.14 3.82 4.50 5.18 5.86 6.55 0.477 1.16 1.84 2.52 3.20 3.89 4.67 6.26 5.93 6.61 0. 545 1.23 1.91 2.59 3.27 3.95 4.64 5.32 6.00 6.68 0.614 1 1.300 2 . . 1 98 3 2.66 4 3 34 5 4.02 6 4.70 7 5 39 8 6.07 9 6 75 1 second-foot equals 40 California miner's inches (law of Mar. 23, 1901). 1 second-foot equals 38.4 Colorado miner's inches. 1 second-foot equals 40 Arizona miner's inches. 1 second-foot equals 7.48 United States gallons per second; equals 448.8 gallons per minute; equals 646,317 gallons for one day. 1 second-foot for one year (365 days) covers 1 square mile 1.131 feet, or 13.572 inches deep. 1 second-foot for one year (365 days) equals 31,536,000 cubic feet. 1 second-foot equals about 1 acre-inch per hour. 1 second-foot for one year (365 days) equals 724 acre-feet. 1 second-foot for one day equals 86,400 cubic feet. 20 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. 1,000,000,000 (1 United States billion) cubic feet equals 11,570 second-feet for one day. 1,000,000,000 cubic feet equals 414 second-feet for one 28-day month. 1,000,000,000 cubic feet equals 399 second-feet for one 29-day month. 1,000,000,000 cubic feet equals 386 second-feet for one 30-day month. 1,000,000,000 cubic feet equals 373 second-feet for one 31-day month. 100 California miner's inches equals 18.7 United States gallons per second. 100 California miner's inches for one day equals 4.96 acre-feet. 100 Colorado miner's inches equals 2.60 second-feet. 100 Colorado miner's inches equals 19.5 United States gallons per second; 100 Colorado miner's inches for one day equals 5.17 acre-feet. 100 United States gallons per minute equals 0.223 second-foot. 100 United States gallons per minute for one day equals 0.442 acre-foot. GAGING STATIONS. The following list comprises the gaging stations maintained .in the south Pacific slope drainage basin in California from 1890 to September 30, 1918. The stations are arranged in downstream order, tributaries being indicated by indentation. A dash following the date implies that the station was being maintained October 1, 1918. The location of these stations is shown on the maps that form Plates I and II (in pocket) . Tia Juana River near Nestor, Calif., 1915. Cottonwood Creek near Dulzura, Calif., 1906-1915. Pine Valley Creek near Dulzura, Calif., 1906-7. Dulzura conduit near Dulzura, Calif. , 1909-1915. Sweetwater River near Descanso, Calif., 1905- Sweetwater River near Dehesa, Calif., 1913-1916. San Diego River at diverting dam near Lakeside, Calif., 1912-1916. San Diego River at Lakeside, Calif., 1905-1916. San Diego River near Santee, Calif., 1912- San Diego River at San Diego, Calif., 1912-1916. Boulder Creek near Julian, Calif., 1912- Boulder Creek near Lakeside, Calif., 1912-1916. Cuyamaca Water Co.'s flume at diverting dam, near Lakeside, Calif., 1912- Cuyamaca Water Co.'s flume near Lakeside, Calif., 1907- South Fork of San Diego River near Alpine, Calif., 1913-1915. South Fork of Cuyamaca Water Co.'s flume near Alpine, Calif., 1913-1915. San Vicente Creek at Foster, Calif., 1914-1917. Santa Ysabel Creek (head of San Dieguito River) near Santa Ysabel, Calif., 1913-1915. Santa Ysabel Creek near Mesa Grande, Calif., 1912- Santa Ysabel Creek near Ramona, Calif., 1912- Santa Ysabel Creek near Escondido, Calif., 1906-1912. San Dieguito River at Bernardo, Calif., 1912-1916. San Dieguito River near Bernardo, Calif. , 1916- San Dieguito River near Del Mar., Califs, 1912-1914. Black Canyon Creek near Mesa Grande, Calif., 1913- Temescal Creek nekr Almond, Calif., 1913-1915. East San Pasqual ditch near Escondido, Calif., 1912-1914. Guejito Creek near Escondido, Calif., 1915-1917. West San Pasqual ditch near Escondido, Calif., 1912-1915. Santa Maria Creek near Ramona, Calif., 1912- San Luis Rey River near Warner Springs, Calif., 1913-1916. GAGING STATIONS. '21 San Luis Rey River near Mesa Grande, Calif., 1911- San Luis Rey River near Nellie, Calif., 1915-16. San Luis Rey River near Pala, Calif., 1903-1916. San Luis Rey River at Pala, Calif., 1912. San Luis Rey River at Bonsall, Calif., 1912-1916. San Luis Rey River near Bonsall, Calif., 1916- San Luis Rey River near Oceanside, Calif. , 1912-1914. Canada Verde Creek near Warner Springs, Calif., 1913-1915. Agua Caliente Creek near Warner Springs, Calif,, 1913-1915. West Fork of San Luis Rey River near Warner Springs, Calif. , 1913-1915. Matagual Creek near Warner Springs, Calif., 1912-1916. Carrizo Creek near Warner Springs, Calif., 1913-1916. Susanna Creek near Warner Springs, Calif., 1913-1916. Escondido Mutual Water Co.'s canal near Nellie, Calif., 1896- Rincon Indian Reservation ditch near Valley Center, Calif., 1912. Pala Indian Reservation canal at Pala, Calif., 1912-13. San Luis Rey ditch near San Luis Rey, Calif., I9I3. Temecula Creek (head of Santa Margarita River) near Temecula, ('alif , , 1906. Santa Ana River near Men tone, Calif., 1896- Southern California Edison Co.'s canal near Mentone, Calif., 1896- Greenspot pipe line near Mentone, Calif., 1897- Mill Creek in canyon at headworks of Crafton canal, Calif., 1897-1902. Mill Creek at Forest Home, Calif., 1903- Highlands canal near Mentone, Calif., 1901-1904. Redlands canal near Mentone, Calif., 1901-1904. Waterman Canyon Creek near San Bernardino, Calif., 1911-1914. Devil Canyon Creek near San Bernardino, Calif., 1911-1914. Lytle Creek at mouth of canyon near Rialto, Calif., 1894-1901. Lytle Creek near San Bernardino, Calif. , 1904- San Jacinto River near Elsinore, Calif. , 1916- Elsinore Lake at Elsinore, Calif., 1915- Temescal Creek near Elsinore, Calif., 1916- San Antonio Creek near Claremont, Calif. , 1917- San Antonio Creek near Upland, Calif., 1901-1917. Southern California Edison Co.'s canal near Claremont, Calif., 1917- San Gabriel River above Fish Fork, near Azusa, Calif., 1900-1901; 1910; 1912. (Low- water records.) San Gabriel River at headworks near Azusa, Calif., 1912-1914. San Gabriel River near Azusa, Calif., 1894- Fish Fork of San Gabriel River near Azusa, Calif., 1900-1901; 1910; 1912. (Low- water records. ) Iron Fork of San Gabriel River near Azusa, Calif., 1900-1901; 1910; 1912. (Low- Avater records.) Coldwater Creek at weir above mouth, 1900. West Fork of San Gabriel River above North Fork, 1900. West Branch of North Fork of San Gabriel River at weir, 1900. North Branch of North Fork of San Gabriel River at weir, 1900. Southern California Edison Co.'s canal near Azusa, Calif., 1896- Tunnel diversion near Azusa, Calif., 1917- Rogers Creek near Azusa, Calif., 1917- San Dimas Creek near San Dimas, Calif., 1916- Fish Creek near Duarte, Calif., 1916- Sawpit Creek near Monrovia, Calif., 1916- Monrovia pipe-line near Monrovia, Calif., 1916- 22 SURFACE WATER OF PACIFIC SLOPE, S0UTHER:N^ CALIFORNIA. Los Angeles River at Los Angeles, Calif., 1896-1900. Pacoima Creek near San Fernando, Calif., 1916- Tujunga Creek near Sunland, Calif., 1916- Haines Creek near Tujunga, Calif. 1917- Arroyo Seco near Pasadena, Calif., 1910- Eaton Creek near Pasadena, Calif., 1918- Santa Anita Creek near Sierra Madre, Calif. 1916- Little Santa Anita Creek near Sierra Madre, Calif., 1916- Malibu Creek near Calabasas, Calif., 1903-1906. Tujunga Creek near Calabasas Calif., 1903-1906. Santa Clara River at Fillmore, Calif., 1911-1912. Piru Creek near Piru, Calif., 1911-1913. Sespe Creek near Sespe, Calif., 1915-1918. Sespe Creek at Sespe, Calif., 1911-1913. Santa Paula Creek near Santa Paula, Calif., 1912-1913. Ventura River near Nordhoff, Calif., 1911-1914. Ventura River near Ventura, Calif., 1911-1914. Gobernador Creek near Carpinteria, Calif., 1916- Mission Tunnel near Santa Barbara, Calif., 1912-1917. San Roqui near Santa Barbara, Calif., 1890. San Jose near Goleta, Calif., 1890. Loma Abajo River, Santa Barbara County, Calif., 1890. Gato Creek at mouth, Santa Barbara County, Calif., 1890. Santa Ynez River near Santa Barbara, Calif., 1903-1908; 1910- Santa Ynez River near Lompoc, Calif., 1906- Mono Creek near Santa Barbara, Calif., 1903-1904. Santa Maria River near Santa Maria, Calif., 1903-1905. TIA JUANA RIVER BASIN. GENEBAL FEATURES. Tia Juana River discharges into the Pacific Ocean below San Diego Bay near the Mexican boundary. Its principal tributary, Cotton- wood Creek, rises in the Laguna Mountains of the Coast Range, and flows south and west for about 20 miles, where it is joined by Pine Valley Creek from the north; it then flows southwestward 12 miles to its junction with Tia Juana River at the Mexican boundary, about 22 miles east of the coast line. The total drainage area of Cotton- wood Creek above its junction with Tia Juana River is about 340 square miles. It lies south of the Sweetwater and Otay River basins and is the most southerly stream in San Diego County. Pine Valley Creek is its only important tributary. The topography of the basin of Cottonwood Creek is rough through- out, although the basin contains some valley areas at elevations exceeding 3,000 feet; below this elevation the creek flows through a deep, narrow canyon, broken only by a short stretch of open country with comparatively light grade at the junction of Pine Valley Creek. Altitudes range from 600 feet above sea level where the creek forms Tia Juana River to 5,000 feet on the Laguna Mountains. TIA JUAN A RIVER BASIN. 23 The Cottonwood basin is very poorly forested. The timber con- sists of scattered oaks, cottonwoods, and alders, which are confined almost entirely to the small valleys along the stream and to the higher elevations. The mountain slopes are fairly well covered with brush. The mean annual rainfall ranges from 8 to 10 inches along the foothills and from 20 to 30 inches in .the mountains. The basin affords several good reservoir sites — the Barrett reser- voir, at the junction of Pine Valley Creek at an elevation of 1,500 feet; the Morena reservoir, on Cottonwood Creek, at the lower end of Morena Valley, 8 miles above the Barrett reservoir; and Pine Valley reservoir, on Pine Valley Creek, at the west end of Pine Valley. The Morena and Pine Valley reservoirs are at an elevation of 3,100 feet. All these sites have been surveyed. The Morena dam has been constructed, and considerable preliminary work has been done at the Barrett dam, including the building of a low concrete dam to a height of about 20 feet above the bed of the stream. A conduit has been constructed to divert water from Cottonwood and Pine Valley creeks above the Barrett dam to the lower Otay reservoir in the Otay River basin. This conduit has a capacity of about 60 second- feet and will divert all the water from these creeks when their combined discharge does not exceed that amount. The city of San Diego receives its water supply from the lower Otay reservoir. GAGING-STATION RECORDS. TIA JTJANA RIVER NEAR NESTOR, CALIF. Location. — At highway bridge on line between sees. 3 and 4, T. 19 S., R 2 W., 3 miles above mouth of river, and 1| miles south of Nestor, San Diego County. Drainage area. — Not measured. Elevation. — About 25 feet above sea level. Becords available. — ^January 29 to September 30, 1915, when station was discon- tinued. Gage. — Gage heights were observed twice a day by measuring from top of bed plate of east truss of bridge to the winter surface. These readings have been reduced to elevations above sea level, United States Geological Survey datum. Discharge measurements. — Made from bridge or by wading. On account of angle which bridge makes with current all measiu-ements made from bridge have been corrected by the coefficient 0.866. Channel and control. — Composed of sand ; shifting. Diversions. — Dulzura conduit diverts from Cottonwood Creek about 12-| miles above its junction with Tia Juana River. There are no other large diversions above the station. Water is pumped for irrigation from wells in the valley above the station. Regulation. — The only storage developed in this drainage basin is at Morena reser- voir (capacity, 46,000 acre-feet), on Cottonwood Creek, about 19 miles above its mouth. Accuracy. — Results are reported as good. Cooperation. — Complete record furnished by C. H. Lee, consulting engineer, Los Angeles. 24 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Discharge measurements of Tia Juana River near Nestor, Calif., during the year ending Sept. 30,1915. Date. Made by- Gage height.a Dis- charge. Date. Made by- Gage height.o Dis- charge. Jan. 29b K. B. Sleppy Feet. 23.30 22.80 22.17 25.60 23.05 23.06 Sec.-ft. 524 548 84 2,700 880 506 Mar. 3b 27 Apr. 6 10 May 1 June 7 D. L. Lee Feet. 23.70 22.41 22.34 22.28 23.02 2L86 Sec.-ft. 1,400 Feb. bh D.L.Lee K. B. Sleppy 62 9& K.B. Sleppy do D.L.Lee... 47 lie D. L. Lee 32 14& 23b do .....do do do 170 1 a Gage heights are elevations above sea level, U. S. Geological Survey datum. b Made from bridge; angle of current 30°; correction coefficient applied, 0.866, and flow of north channel added, c Float measurement. Daily discharge, in second-feet, of Tia Juana River near Nestor, Calif., for the year ending Sept. SO, 1915. Day. Jan. Feb. Mar. Apr. May. June. Day. Jan. Feb. Mar. Apr. ■ May. June. 1 202 620 1,800 1,245 770 306 233 131 95 168 3,061 1,921 1,608 1,313 1,032 893 2,361 1,909 1,539 1,506 1,324 1,175 1,026 952 1,026 1,059 909 860 721 613 48 48 40 40 39 39 39 32 26 30 25 25 24 23 22 201 638 852 934 1,157 1,414 1,216 975 957 834 424 363 242 340 267 18 18 14 14 10 2 2 16 918 655 627 ^88 455 1,147 975 728 567 713 877 770 729 381 332 283 217 160 154 119 92 92 72 58 58 58 58 58 50 29 31 18 13 11 9 10 21 23 28 25 15 10 12 27 185 114 102 201 160 108 72 61 45 61 39 31 2 17 3 18 3 19 5 20 6 21 7 . 22 ... 8 23 9 24 10 25 11 26 12 27 ... 13 28 25 14 29 . . 530 2,743 806 23 23 18 15 30 31 Note.— No flow Oct. 1 to Jan. 28 and June 8 to Sept. 30. COTTONWOOD CREEK NEAR DTTLZURA,! CALIF. Location. -^At Barrett dam, 1* miles below intake of Dulzura conduit, in SW. \ sec. 15, T. 17 S., R. 3 E., about 7 miles northeast of Dulzura, San Diego County. Lyons Creek enters half a mile and Pine Valley Creek 1 mile above the station. Drainage area. — 246 square miles (measured on topographic maps). Elevation. — About 1,500 feet above sea level. Records available. — January 1, 190G, to December 31, 1915. Gage. — Several gages at independent datums have been installed. Two vertical staff gages used 1909-1915. Upper gage is fastened to upstream face of the dam on left bank; reads depth of water over crest; the lower gage, which is fastened to upstream face oi dam between flume and right bank, is read when no water is flowing over crest of dam; its datum is 2.50 feet lower than that of the upper gage. Discharge measurements. — Made at low concrete dam back of which sand and gravel have been deposited to the level of its crest. At low stages the flow is restricted to a rectangular wooden flume through the wall of the dam, but at high stages the flow is over the entire length of the crest, which is 61 feet. Meas- urements have been made by wading, except at high stages, when only float measurements have been made. (See PL XVIII, B, p. 493.) Channel and control. — Bed above and below dam consists principally of sand; shifting. The dam acts as control for the station. 1 Described as "near Jamul" in early water-supply papers. TIA JUANA RIVEK BASIN. 25 Extremes of discharge. — 1906-1915: Maximum m^an daily discharge, 5,800 sec- ond-feet, March 24, 1906; channel usually dry several months each year. Diversions. — Dulzura conduit diverts ^yater from Cottonwood and Pine Valley creeks, half a mile above their junction, into Dulzura Creek drainage basin. See record of Dulzura conduit near Dulzura, Calif. Regulation. — ^Morena reservoir on Cottonwood Creek, about 8 miles above Barrett dam, has a capacity of 46,000 acre-feet. Water stored in this reservoir is released •when needed for Dulzura conduit. AccuRACY.^ — Discharge measurements have been made by the United States Geo- logical Survey and rating curves developed for both gages. On account of the few measurements made in recent years, records since 1910 are not considered so reliable as those for earlier years. ^ Cooperation. — Records 1909-1911 furnished by Southern California Mountain Water Co., through M. M. O'Shaughnessy, chief engineer. Since the city of San Diego took over the system of the Southern California Mountain Water Co. in 1912, the records have been published as submitted through the department of water, except that determinations of daily discharges have been converted from million gallons per day to second-feet, and monthly discharge has been computed by the United States Geological Survey. Later records are withheld by city of San Diego on account of pending litigation. Discharge measurements of Cottonwood Creek near Dulzura, Calif ., for 1905-1915. Date. Made by— Gage height. Dis«. charge. Date. Made by— Gage height. Dis- charge. 1905. Feet. Sec.-ft. 1907. Feet. Sec.-ft. Nov. 18 W. "b. Clapp 0.5 1.1 May 19 29 W.V.Hardy. 0.37 .41 34 Dec. 14 ( 3.H.Lee„. 0.05 Hardy and Hall 46 June 11 Clapp and Hardy N.L Hall.. 1 .28 22 1906. W. V. Hardy .10 3.5 16 20 21 Jan. 6 do 1.08 19 19 . ...do ...do .21 .30 12.4 32 27 Dec. 6 W. V. Hardy. .89 .72 14 19 . do 11 20 . ...do .40 39 20 . ...do .50 63 1908. 20 . ...do .55 76 Jan. 17 do .81 14 Feb. 3 . ...do .05 4.1 27 do 1.95 52 14 . ...do .23 15.5 Feb. 14 do 2.30 62 Mar. 11 . ...do .12 13.2 23 do 1.97 43 12 . ...do 1.21 383 Mar. 12 do 1.53 31 13 . oe Hooker... 2.20 .82 644 150 21 Apr. 5 do do i:i2 .91 20 16 . ...do 17 21 . ...do .58 90 May 12 do .73 11 24 . ...do 6.00 5,330 Nov. 18 do 1.6 25 . ...do 6.50 4,100 Dec. 22 do 4.3 31 . ...do 1.10 416 Apr. 7 . ...do .81 239 1909. 19 V. V. Hardy. .59 .40 116 76 Feb. 24 Apr. 21 do Clapp and Hardv 2.55 .55 90 May 8 1. -.-do 7.8 JuBe 22 ! 1 2. H.Lee .28 14.2 1.0 32 40 May 27 1910. Jan. 24 W. V. Hardy .5 Oct. 5 ! ^V. F. Martin... .50 Nov. 27 VV. V. Hardy .90 2.00 do Dec. 15 . ...do 5.7 Mar. 13 do .31 2.2 1907. j June 5 do .10 .4 Jan. 5 i. ...do 2.25 56 15 i. ...do .60 171 Feb. 7 1. ...do .38 50 1913. 26 - ...do .48 59 Apr. 16 H. D. McGlashan .23 2.3 Mar. 8 ;. ...do .80 191 20 '. ...do .60 89 1915. Apr. 12 L ...do ...do .64 .51 105 72 Apr. 5 Sept. 23 F. C. Ebert .30 .30 4.0 27 {. do 1.0 28 . ...do .50 68 Note.— Thedischargemeasurementsare referred taseveral gages at independent datum planes. Forthe measurements beginning with 1909 two gages were used, one being read at low stages, when the water flows through a 6-foot flume in the dam, and the other when the water flows over the crest of the dam. Some measurements were made with the 6-foot flume open and others with the flume closed. The difference in datum between the gages is 2.5 feet. 26 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORISTIA. Daily discharge, in second-feet, of Cottonwood Creeh near- Dulzura, Calif., for 1907-1915, Apr. May. July. 130 110 92 92 221 121 98 150 112 121 105 -1,170 390 221 192 178 139 108 121 95 250 121 54 54 54 47 105 116 76 56 87 87 61 79 54 155 185 134 134 134 162 162 244 178 178 221 285 516 313 264 178 145 306 221 192 169 134 121 95 121 108 105 95 95 87 82 71 71 71 76 82 49 54 52 47 40 34 30 32 30 40 29 20 36 8.1 7.2 6.2 6.0 8.7 4.4 4.1 3.6 3.1 3.8 4.8 4.2 4.4 5.7 4.2 3.6 3.6 3.6 3.4 2.9 2.9 2.9 2.2 2.2 2.2 2.9 3.6 4.4 3.6 3.4 2.9 2.2 2.2 2.2 3.1 3.7 4.6 5.9 4.0 4.3 4.0 4.0 3.5 3.5 5.4 9.8 13 13 10 8.2 9.4 8.6 10 9.( 8.8 8.2 7.2 7.8 7.4 8.0 10 10 7.6 7.4 7.0 9.2 9.2 8.0 7.6 7.8 7.0 7.6 8.0 7.6 7.8 8.2 9.2 9.2 12 10 10 11 11 10 10 10 10 10 9.4 10 9.2 10 9.6 9.6 19 22 14 13 12 12 12 17 130 155 62 56 56 37 63 112 79 43 43 43 35 31 34 34 37 40 44 74 42 34 32 30 25 23 15 17 22 31 42 37 18 18 20 20 20 17 17 17 15 15 10 12 10 24 31 17 13 12 7.0 7.7 7.5 7.7 7.5 7.7 7.0 6.3 5.7 5.5 5.0 3.7 3.9 2.6 3.3 3.1 2.4 2.3 2.4 2.4 3.0 2.3 2.0 1.7 1.1 1.1 0.7 .7 .7 .3 .1 .1 .06 .02 .02 .02 .02 .02 .02 .02 .02 .02 .03 .03 .03 .04 .04 .04 .04 .04 .05 .05 TIA JUANA KIVER BASIN. 27 Daily discharge, in second-feet, of Cottonwood Creek near Dulzura, Calif., for 1907-1915 — Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1908-9. 1 0.32 .32 .32 .33 .33 .33 .34 .34 .34 .35 .35 .35 .35 .37 .39 4.2 5.5 6.3 5.2 4.5 4.2 4.0 3.7 3.4 3.4 3.1 3.8 4.0 4.2 4.3 4.5 1.0 1.0 1.5 2.0 1.5 1.5 1.5 1.0 .5 .5 11 1.0 .5 .5 .5 .5 .5 1.0 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2.0 2.0 4.0 3.8 3.6 3.6 3.7 3.8 3.9 4.0 4.2 4.6 4.6 4.6 4.5 4.5 4.3 3.9 3.9 3.9 4.0 4.2 4.4 4.4 5.0 5.0 5.0 5.0 5.0 4.5 4.7 4.7 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 6.0 6.0 8.1 10 9.2 12 18 10 9.2 8.1 8.1 7.0 7.0 8.1 8.1 8.1 8.1 34 30 16 12 10 5.0 5.5 8.6 7.2 5.7 6.0 6.0 5.5 5.0 4.8 5.0 4.7 4.7 4.7 5.4 7.3 7.3 7.0 7.0 6.8 7.0 7.2 6.8 6.1 7.2 7.5 6.8 6.6 6.1 6.1 6.1 8.1 12 10 8.1 20 15 6.0 6.0 92 30 6.0 4.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 12 190 18 8.1 10 6.0 6.0 4.0 4.0 3.2 3.2 4.0 8 8 8 8 8 8 8 8 8 12 10 8 17 208 56 44 34 34 20 17 15 78 464 464 620 620 132 132 69 51 36 69 33 43 23.4 78 45 31.5 27.3 24.7 18.3 22.1 23.4 14.7 24.7 31.5 190 145 43 34.5 26 15.9 12.5 8.3 6.0 7.7 6.0 5.2 5.0 4.2 4.4 4.0 27 17 8.1 29 7.0 8.1 8.1 159 69 39 36 132 208 132 132 78 62 51 30 22 226 132 92 92 69 62 51 47 4.8 4.0 4.2 4.8 4.4 4.4 4.4 3.8 3.0 2.6 3.3 2.6 2.5 2.6 3.0 2.8 2.3 2.6 4.4 23.4 12.9 5.0 4.0 4.0 4.2 4.0 4.0 3.1 43 36 39 22 20 17 39 25 22 20 10 8.1 6.0 4.0 4.0 5.0 6.0 4.0 4.0 4.0 47 273 159 111 102 111 473 509 438 304 273 4.0 3.8 3.8 3.8 3.1 3.1 3.6 2.5 3.3 3.1 3.0 2.5 2.5 2.6 2.6 2.6 3.1 4.4 3.1 2.6 2.6 2.6 2.6 2.6 2.6 8.5 14.7 69 54 36 37.5 132 122 HI 92 92 78 62 49 39 36 34 30 26 22 17 14 10 8.1 8.1 8.1 8.1 8.1 6.0 6.0 4.0 4.0 4.0 3.2 9.2 9.2 65 54 49 27.3 7.0 4.4 4.2 3.6 3.6 3.1 2.6 4.0 3.8 2.5 2.3 2.5 2.2 2.2 1.3 1.3 1.3 1.3 1.0 7.0 1.1 1.1 .8 1.1 .8 .7 6.0 4.0 4.0 4.0 4.0 3.2 2.5 4.0 2.5 3.2 3.2 3.2 3.2 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.0 2.0 .8 .8 .7 1.3 1.2 2.1 2.3 2.1 1.0 1.0 1.0 .8 1.0 1.0. 1.0 1.0 1.0 1.0 .8 1.0 1.0 1.0 ".7 .5 .5 .4 .5 .4 .3 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.5 1.5 1.5 2.0 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.0 6.0 1.5 1.5 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 .5 .5 .5 .3 .4 ■■■■-■ .3 .3 1.5 1.5 .5 9.0 2.5 1.0 1.0 1.0 -■■■■- .5 5.0 2.5 2.0 10 4.0 1.5 1.0 .5 .5 .5 '""7.0' 2.0 .5 17 22 10 2.... 5.0 3 4.0 4 3.0 5 3.0 6 7.0 7 6.0 8 3 9 2.5 10 1 5 11 1 5 12 1.0 13. .. 1 14 5 15 5 16 5 17 5 18 5 19 .5 .5 .5 .5 1 20 21 22 23 24 1 5 25 1 5 26 1.5 1.5 1.0 1.0 1.0 27-. 28 29. 30 31 1909-10. 1 .4 .5 .5 .5 .4 .3 .4 .3 .2 .2 .2 .2 .2 .2 1.0 1.0 1.0 .5 .4 .3 .1 .3 .2 2 .2 .2 .1 .1 .1 .1 .1 .1 .1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 28 SURFACE WATER OF PACIFIC SLOPE, SOUTHERI^ CALIFORNIA. Daily discharge, in second-feet, of Cottonwood Creek near Didzura. Calf ..for 1907-19 15- Contimied. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. Jnly. Aug. Sept. 1910-11. 1 1.3 1.8 3.1 5.0 3.1 2.2 2.2 2.2 2.2 1.8 1.8 2.2 3.1 7.7 4.8 3.6 2.6 2.3 3.8 2.5 3.3 2.3 2.2 2.2 2.2 2.6 2.3 2.3 2.3 2.5 2.2 2.2 2.1 2.1 2.5 2.5 2.2 2.2 2.2 2.2 2.1 1.8 1.8 2.2 1.8 1.8 2.1 2.1 2.2 3.1 2.3 2.3 2.2 2.2 2.1 2.6 1.8 2.1 1.7 1.7 2.5 0.1 .1 .1 .1 .6 .6 .6 .6 .6 .9 .9 .9 .9 .9 ' .9 .9 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 3.4 3.4 3.4 2.6 2.6 2.6 2.0 2.0 2.6 11 8.6 3.1 3.1 2.8 3.1 2.6 2.5 2.5 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.6 2.6 3.7 2.0 1.8 1.8 1.7 1.7 1.7 1.7 1.5 1.7 1.7 2.0 2.0 1.7 1.7 2.0 2.2 2.4 3.0 4.2 3.0 2.0 1.8 1.5 1.7 1.5 1.7 1.7 1.7 1.5 1.5 1.5 3.7 2.6 3.7 2.8 35 3.7 3.7 3.7 4.6 4.6 3.7 3.4 3.1 22 5.9 3.7 3.6 3.1 2.3 3.1 2.5 2.0 2.0 2.0 1.9 1.5 2.3 2.6 1.3 1.5 1.3 1.5 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.5 1.5 1.5 1.3 1.3 1.3 1.2 1.3 1.3 1.3 1.3 1.3 1.2 1.2 1.2 1.0 2.2 2.2 3.7 13 7.2 2.4 2.0 2.0 2.0 3.0 5.4 2.3 2.0 2.0 1.5 1.5 1.4 1.1 1.1 1.1 1.4 1.4 1.4 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 2.0 1.5 1.5 1.5 1.5 2.4 1.7 1.7 2.7 221 11.6 5.0 39.2 8.6 4.2 3.0 2.0 1.8 1.7 1.8 1.8 2.2 1.7 1.7 1.7 2.0 2.0 2.0 2.0 26.5 5.2 1.1 1.5 1.4 1.4 1.4 1.4 1.5 1.4 1.5 1.4 1.1 1.1 1.1 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.1 1.0 1.1 1.0 1.1 1.5 1.5 1.5 1.0 1.0 3.0 2.0 2.0 2.0 2.0 2.0 1.8 1.7 2.0 2.0 32.9 113 73.0 54.0 48.0 40.0 25.0 16.0 10.1 4.2 3.0 2.7 2.5 2.0 1.7 1.7 2.0 2.0 2.0 1.7 1.0 1.1 1.0 1.1 1.0 1.0 1.0 .8 .8 .8 .8 .8 .8 1.5 1.0 1.1 .8 .8 .7 .7 1.3 1.3 1.3 1.0 .8 1.0 L3 1.0 1.0 1.0 1.7 1.7 1.5 1.5 1.5 1.5 1.7 2.4 3.8 2.4 1.8 1.7 1.5 1.3 1.3 1.3 1.3 .9 .9 .7 !9 .9 .9 .9 .9 .9 .7 .6 .6 .5 1.7 1^7 1.4 1.3 1.2 .7 .5 2 - . 1 .. 3 1 4 i 5 i 6 1 7 1 8 9 j 10 .4 '.2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .1 .0 .0 .0 11 1 12 13 14 15 16 1 17. 1 18 "" ! 19 0.1 .2 .3 .2 .5 .5 .4 .5 .5 .8 1.0 1.1 1.2 20 21 1 22 23 24.. .... .. 25 26 27 28 29 30 31.. 1911-12. 1... "1 .5 .4 .4 .5 is .5 .5 0.4 .9 1.5 1.3 .4 .3 \h .1 2 3 . . 4 5 6 7 8 9 10 11 '. ' 12 .5 .5 :^ .4 .4 .3 .3 .4 .4 .3 13 14 15 . . 16 17- 18 19 i 20 1 21 22 "■ ' 23 .9 .7 24 1 25 26 j 27 .5 28 .3 .5 .3 29 30 i 31 :::::::::;:::: i I-. TIA JUANA RIVER BASIN. 29 Daily discharge, in second-feet, of Cottonwood CreeJcnear Dulzura, Calif., for 1907-1915- Continued. I>ay. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1912-13. 1 0.0 .0 .0 .0 .0 .0 .0 .0 .0 .2 .3 .3 .3 .4 .5 .9 .9 .9 .9 1.0 .9 .9 .9 .7 1.0 1.0 .9 .7 .9 .9 1.0 .9 1.0 1.2 1.2 1.3 1.3 1.2 1.2 1.2 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 2.0 2.0 1.7 1.7 1.8 1.8 1.7 1.7 1.6 1.6 1.6 1.7 1.7 1.8 1.8 1.8 1.8 1.4 1.1 1.1 1.2 1.4 1.6 1.4 1.4 1.4 1.4 1.2 1.2 1.2 1.2 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.7 1.7 1.7 1.5 1.5 1.3 1.8 2.4 2.4 1.7 1.5 1.5 1.5 1.7 1.5 1.5 1.5 1.5 1.5 1.2 1.2 1.0 1.0 1.2 1.2 2.0 1.4 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.7 1.7 2.0 2.0 1.7 1.7 1.4 1.4 1.4 1.4 2.4 6.3 52 3.4 2.0 2.0 1.0 1.0 1.0 1.0 1.4 1.4 1.4 1.5 1.4 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.4 1.8 2.2 29 3.4 2.0 10 2.5 6.6 2.5 2.0 2.0 2.0 1.7 1.7 1.7 1.7 1.7 1.7 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.5 1.5 13 19 429 202 30 6.8 3.4 2.6 2.3 2.0 2.9 2.0 1.7 1.5 1.5 1.5 1.5 1.4 1.4 1.4 1.5 1.8 1.5 1.4 1.4 1.4 1.2 1.4 1.4 1.5 1.5 1.5 3! 2 1.7 1.5 1.4 1.4 1.4 1.8 6.3 2.0 2.0 1.7 1.7 1.5 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.6 1.4 1.1 1.1 1.1 1.1 8.5 6.6 4.3 2.5 2.4 2.2 2 4 2 2 2 2 2 2 2 4 2 4 2 5 2 7 2 7 2.7 2.5 2.5 2.4 2.4 2.0 2 2.0 1.8 1.8 1.8 1.8 2.0 2.0 2.0 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.0 1.0 1.0 1.0 1.0 .8 '.6 .6 .7 1.2 1.2 1.1 1.1 1.0 1.0 1.4 1.7 2 2.0 2 1.8 1.8 1.8 1.5 1.4 1.2 1.2 1.2 1.2 1.2 1.2 1.0 1.0 1.0 1.0 .9 .7 .6 .6 .6 .4 .4 .4 .4 .6 .4 .4 .4 1.7 1.7 1.4 1.2 1.1 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 .8 I'.l 1.1 0.6 .6 .6 .6 .6 .6 .6 .5 .5 2 1 3 . ... 4 ! 5 1 6 I 7 . . - g 9 10 .5 .5 1 11 . . 12 .5 .4 .4 .4 i .3 .3 .2 .2 .2 .2 .2 .2 .0 .0 .0 .0 .0 13 14 . 15 16 17 18 19 . ... 20 21 22 23 24 25 26 1.0 27 1.2 1.3 1.0 1.2 28 29 30 31 . .. 1913-14. 1 1.1 1.1 1.0 .7 .7 .7 .7 2 2 2.0 1.4 .7 .6 2 1 3 4 6 . .-- s 9 10 11 12 13 14 15 .4 .2 .2 .2 .2 .4 .3 .3 .3 • .2 .2 .1 16 17 18 19 1.6 1.7 1.2 1.1 1.1 1.1 1.2 1.2 1.2 1.5 20 21 22 23 24.. 25 26 27 28 29 30 [ 31 1 30 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Cottonwood Creel near Dulzura, Calif., for 1907-1915- Continued. Day. Apr. May. Jtay. Aug. Sept. 7.. 8.. 9.. 10.. 11.. 12.. 13.. 16.. 17.. 18.. 19.. 20.. 0.35 .35 .35 .35 .35 .35 .35 .35 .35 .35 1.20 .70 .56 .56 .56 1.30 1.70 1.30 1.30 .70 .70 .70 .70 .70 .70 .70 .70 .70 .70 .70 0.70 .70 .70 .70 .70 .70 .70 .70 .70 .70 .70 .70 .70 .70 .70 .70 .70 .70 .70 .70 .70 1.30 .70 .70 .70 .70 .70 1.00 12.2 74 100 29 9.4 3.7 2.0 1.2 .43 81 190 112 83 65 42 43 20 18.2 43 60 68 44' 22 32 14.3 10.2 82 115 19.6 13.8 10.9 8.9 7.8 6.7 5.1 5.3 3.1 2.9 2.9 2.9 3.3 3.2 3.4 4.4 5.4 4.3 4.3 7.0 9.8 5.7 6.2 5.3 5.4 4.7 5.1 11.2 5.4 5.1 5.4 7.5 104 257 176 130 118 102 495 25 45 33 22 14.7 10.5 27 22 7.1 5.9 5.1 4.8 4.7 4.5 4.3 4.9 6.6 4.7 4.1 3.8 3.6 3.5 3.4 3.3 3.3 3.3 3.3 3.2 3.2 3.0 2.9 2.9 3.0 2.8 2.9 2.5 2.5 2.5 2.5 2.3 2.2 2.2 2.2 2.3 2.3 2.2 2.2 2.1 2.1 2.2 2.1 2.1 2.1 1.9 1.9 2.0 2.0 2.0 2.5 ' 2.5 2.5 2.4 2.5 2.7 2.7 2.5 2.4 2.2 2.3 2.2 2.0 2.0 1.7 1.6 1.9 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.6 3.4 3.3 2.8 2.7 3.0 3.6 4.4 4.2 4.0 3.9 Oct. Nov. Dec. 3.9 3.4 6.3 3.6 3.4 6.4 3.6 3.4 6.8 4.0 3.7 11.1 3.4 3.7 12.6 3.3 3.7 9.8 3.4 3.6 8.3 3.1 3.6 7.6 3 3.4 7.0 3.1 4.5 6.6 Day. Oct. Nov. Dec. 1915. 11 3.4 3.6 4.2 4.2 4.2 4.4 4.0 4.5 3.9 3.6 4.0 3.6 3.4 3.4 3.4 5.7 7.3 7.1 6.8 6.4 6.7 6.7 6.7 11.8 19.3 9.6 9.6 10.1 10.1 10.1 12 13.. 14 15 16 17 18.. 19 20 Day. Oct. Nov. 1915. 21 3.7 3.7 3.9 4.4 4.7 4.7 4.5 3.9 3.0 3.1 3.4 6.5 6.6 6.7 6.8 6.8 6.8 7.3 7.1 6.9 6.9 22 23.. 24 25 26 27 28.. 29 30 31.. 7.5 5.7 4.8 4.5 3.5 3.5 4.5 7.5 10.5 Note.— Daily discharge computed from a rating curve well defined below 55 second-feet. Stream dry on all days for which discharge is not given. TIA JUAliTA RIVER BASIN. 31 Monthly discharge of Cottonwood Creek near Dulzura, Calif., for 1906-1915. Month. Discharge in second- feet. Run-off (total in acre- feet). Month. Discharge in second- feet. Run-off (totalin Maxi- mum. Mini- mmri- Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1906. January 59 100 5,800 350 93 55 93 51 4.8 2.0 7.0 5.0 93 20 20 2.0 .9 .8 15.5 24.1 594 176 54.9 30.5 12.0 6.0 1.3 953 1,340 36,500 10,500 3,380 1,820 738 369 77 1910-11. October 1.2 7.7 3.1 11 35 13 1.5 1.5 1.7 0.0 1.3 1.7 2.0 1.5 1.1 1.0 .7 .0 0.24 2.78 2.16 3.09 4.96 2.33 1.20 .98 .49 15 February March November December January 165 133 April 190 May February March 275 143 July April 71 May 60 September 29 The year . . 1911-12. November December January The period 55,700 35 .0 1.49 1,080 1906-7. October 7.1 33 375 1,170 116 648 306 66 49 8.7 2.5 2 .9 7.6 30 46 36 44 64 28 9 2.2 .1 .3 3.0 20.4 80.8 175 66.9 191 111 44.4 23.2 4.2 1.2 1.0 184 1,210 4,970 10, 800 3,720 11, 700 4,600 2,730 1,380 258 74 60 .0 1.5 4.2 1.5 221 113 3.8 .9 1.5 .0 .1 1.5 1.0 1.5 1.7 .5 .3 .0 .00 1.04 1.92 1.31 11.8 15.2 1.32 .46 .19 November December January .0 64.0 118 February March February March 75.4 726 April April 910 May May 81.2 June June 27.4 July . . July 11.7 The year . . 1912-13. November December January September 221 .0 2.77 2,010 The year 1,170 .1 60.2 41,700 1.3 1.3 2.4 29 6.3 8.5 2.0 .6 .0 .7 1.0 1.0 1.2 1.8 .4 .0 .0 .91 1.52 1.49 2.98 1.76 2.66 1.04 .34 1.70 1907-8. October 16 12 12 96 155 74 31 20 6.6 .70 .50 .32 2.2 7.0 7.6 10 28 15 10 6.4 .50 .02 .05 .07 7.5 8.9 9.8 25.2 58.4 34.0 15.6 9.51 3.49 .145 .085 .214 461 530 603 1,550 3,360 2,090 928 585 208 9 5 13 54 93 November 92 December January February March 166 108 February April 158 March May 64 April. 20 May September 101 The year . . 1913-14. November December January July 29 .0 1.18 856 August September 1.7 2.0 52 429 2.0 1.7 1.7 2.0 .0 1.1 1.1 1.4 1.1 .6 !o .51 1.55 3.30 26.4 1.34 1.04 .96 .61 The year 155 .02 14.4 10,300 30 95 203 1908-9. 6.3 5.0 8.6 620 226 510 132 6.0 6.0 1.5 22 10 .32 3.6 4.7 8.0 7.0 4.0 3.0 2.0 1.0 .0 .0 .5 2.37 4.31 6.22 104 72.4 101 35.0 2.90 1.78 .70 2.95 2.10 27.8 146 256 382 6,400 4,020 6,210 2,080 178 106 43 181 125 20, 100 October February March 1,470 82 November December April . 62 January Mav 59 February June .. 36 The year.. 1914-15. December January April 429 .0 2.81 2,040 May. June 1.7 169 448 115 65 257 6.6 2.7 3.7 4.4 .00 .70 .43 2.9 4.3 4.3 2.5 1.9 1.6 2.7 .657 11.9 59.0 26.5 7.78 58.1 3.30 2.28 3.00 3.66 July August 40 September 732 February March The year 620 .0 1 630 '463 3,570 19G 1909-10. 11 34 190 190 23.4 69 65 2.3 1.0 .1 .5 2.5 2.5 4.0 2.3 2.5 .7 .3 .1 .0 1.55 9.07 16.2 33.1 4.68 9.57 8.74 .95 .34 .01 95 540 996 2,040 260 588 520 58 20 1 May.."!.'.'.'.'.'.".".'".' October November July 140 December August . 184 January September The year.. 1915. October 218 February.... March 448 .00 14.4 10,500 April May 4.7 7.3 19.3 3.0 3.4 3.5 3.79 5.20 8.20 June July 233 November December The year.. 190 .0 7.07 5,120 504 Note.— No flow in mohths for which discharge is not given. Records therefore represent full years. 32 SUEFACE WATER OF PACIFIC SLOPE, S0UTHEE:N^ CALIFORNIA. Combined daily discharge, in second-feet, of Cottonwood Creek and Duhura conduit near Dalzura, Calif ,forl909-19 15. Day. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1909. 1 10 10 10 10 10 10 10 10 10 16 13 10 24 254 83 66 51 64 29 24 21 78 464 464 620 637 147 157 90 78 64 50 40 36 71 44 40 40 198 113 83 80 174 247 169 174 118 102 93 79 71 275 171 135 142 118 112 101 97 93 84 81 77 70 67 90 75 72 67 62 58 51 49 48 49 50 48 52 47 47 280 178 162 152 163 522 562 488 357 327 186 175 167 148 148 134 120 101 91 92 90 86 82 78 73 69 64 64 64 64 64 64 56 54 52 48 46 45 57 43 38 40 36 34 34 31 31 34 29 28 30 28 31 31 27 27 26 26 26 24 24 24 24 24 24 21 21 19 19 19 17 14 12 11 12 11 12 12 12 12 12 10 12 10 .8.8 8.8 8.8 8.8 7.4 8.8 10.0 8.8 7.4 7.4 4.7 4.7 4.7 3.6 3.6 3.1 8.1 2.2 2.6 1.6 1.6 1.4 1.4 1.4 1.6 1.2 1.2 1.0 1.0 1.0 1.0 .5 .5 .5 .3 .4 .3' .3 .3 1.5 1.5 .5 9.0 2.5 1.0 1.0. 1.0 .'5" .5 5.0 5.0 2.0 10.0 4.0 1.5 1.0 .5 .5 .5 """7.0' 20 .5 17 .22 10 5 4 2. . 3 4.,.. 3 5. . 3 7 6 7 6 , 8 3 9 .. 2.5 1.5 15 10 11 12 1 13 1 14 .5 15 .5 .5 m 1?.... 5 18.. 5 19 5 20 5 2X .5 22.. 5 23 1.0 24.. . 1 5 25. 1.5 26 ... 1 5 27 1.5 28.. .. 1 29.- 1.0 30. .. 1.0 31. .. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. 1909-10. 1.0 1.0 1.5 2.0 1.5 1.5 1.5 1.0 :l 11 1.0 .5 .5 .5 . 5 .5 1.0 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2.0 2.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 6 6 8 10 9 12 18 10 9 8 8 7 7 8 8 8 8 34 30 16 12 10 8 12 10 8 20 22 13 15 120 81 36 21 15 14 12 10 9.1 8.4 8.4 36 242 53 40 40 34 30 ' 27 25 24 24 33 90 33 61 73 127 99 90 83 81 74 77 79 68 76 84 245 199 95 90 81 72 68 64 62 58 56 52 50 49 47 44 47 53 46 42 43 40 40 41 40 39 36 35 34 34 37 35 31 33 38 75 51 43 40 36 38 34 34 31 31 30 29 28 26 26 27 26 28 25 23 22 22 22 23 24 28 38 33 29 26 29 33 28 32 64 65 122 108 90 92 65 54 49 39 42 42 40 36 34 33 33 31 46 36 31 27 24 23 20 19 19 16 15 9.6 12 11 8.8 11 10 11 11 13 12 12 11 11 9.3 8.3 6.9 6.9 6.6 5.3 5.5 5.5 6.2 5.8 4.2 3.6 3.4 6.2 5.5 4.8 3.9 2.8 2.3 2.1 1.9 1.3 1.2 .8 .7 0.8 .9 .9 .9 .9 :l .7 .6 .4 .4 .4 .3 .4 1.0 1.0 1.0 .5 .4 .3 .1 .3 .2 .2 .2 .2 .1 .1 !i 0.1 2 .1 3 .1 4 5 6 7 8 9 10 11 12. . 13 : 14 15... 16 17- 18 19-. - 20- 21-.. 22 23 24-. 25 26. 27 28 ... 28 30 31 TIA JUAN A EIVEK BASHsT. 33 Combined daily discharge, in second-feet, of Cottonwood Creek and Dulzura conduit near Duhura, Calif, for 1909-1915— Gontuiued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. 1910-11. 1 1.3 1.8 3.1 o.O 3.1 2.2 2.2 2.2 2.2 1.8 1.8 2.2 3.1 4*8 3.6 2.6 2.3 3.8 2.5 3.3 2.3 2.2 2.2 2.2 2.6 2.3 2.3 2.3 2.5 2.2 2.2 2.1 2.1 2.5 2.5 2.2 2.2 2.2 2.2 2.1 1.8 1.8 2.2 1.8 1.8 2.1 2.1 2.2 3.1 2.3 2.3 2.2 2.2 2.1 2.6 2.2 2.5 2.1 2.1 2.9 3.4 3.4 3.4 2.6 2.6 2.6 2.0 2.0 2.6 11 8.6 3.1 3.1 2.8 23 7.1 19 9.3 9.3 6.9 6.9 9.3 15 6.9 17 9.3 6.9 9.6 16 14 23 19 36 68 97 41 24 52 47 45 41 36 21 73 54 46 36 31 28 27 22 15 12 12 16 14 37 31 26 35 46 78 40 26 26 30 35 62 43 40 30 26 22 21 20 18 16 15 15 18 16 14 14 14 14 12 12 9.5 9.5 9.5 22 18 14 11 11 26 18 14 13 11 11 11 9.4 9.4 8.0 8.0 8.0 8.0 8.0 8.1 8.0 6.9 6.8 6.9 7.3 7.3 7.3 6.8 6.8 1.0 1.1 1.0 1.1 1.0 1.0 1.0 .8 .8 .8 .8 .8 .8 1.5 1.0 1.1 .8 .8 .7 .7 1.3 1.3 1.3 1.0 .8 1.0 .7 1.3 1.0 1.0 1.0 1.7 2 1.7 3 1.7 4 1.4 5.. .. 1.3 6 1.2 8 .7 9 .5 10.... .4 11.... .2 12 .2 13 .2 14.... 2 15 . .. .2 16 .2 17.... 2 18. .. .2 19 0.1 .2 .3 .2 '.3 .4 '.5 .8 1.0 1.1 1.2 .2 20.... .2 21 .2 22 .2 23 24 25 26 27. .2 .2 .2 .2 . 1 28 29 30 31 Day. Dec. Jan. Feb. Mar. Apr. May. June. July. 1911-12. 1 0.1 .1 .1 .1 .6 .6 .6 .6 G .9 2.0 1.8 1.8 1.7 1.7 1.7 1.7 1.5 1.7 1.7 2.0 2.0 1.7 1.7 22.7 40.7 43.3 43.1 45.6 41.9 9.2 7.1 6.3 5.9 5.7 5.6 6.5 6.2 5.7 5.7 5.7 4.9 5.1 4.9 5.1 4.9 4.9 5.5 5.5 5.5 4.9 4.9 4.9 4.2 4.4 4.4 4.4 4.2 4.2 4.2 4.1 3.9 4.2 4.2 4.2 4.2 4.1 4.1 4.1 3.8 7.3 9.7 9.3 10.0 8.7 18.5 14.6 10.5 13.4 261 46.6 27.4 82.0 46.7 33.9 23.0 19.8 17.6 16.1 15.3 19.6 21.6 17.8 16.5 14.9 15.8 22.4 19.2 17.8 60.4 48.0 41.5 32.8 26.0 23.1 22.0 22.7 19.6 17.5 19.8 23.5 70.2 160.5 116.8 97.8 90.8 81.4 70.7 60.7 51.9 45.1 40.3 34.5 30.2 26.4 23.7 23.2 24.8 22.7 20.1 18.9 17.8 17.5 17.3 15.9 15.9 14.7 14.9 29.2 44.7 32.1 24.2 20.9 18.3 16.1 14.5 13.2 12.6 11.6 10.8 9.9 9.9 10.1 9.4 9.4 8.7 8.7 8.1 7.9 6.5 5.9 5.3 4.6 4.0 3.4 2.8 2.2 2.2 2.0 2.0 2.0 2.0 2.0 1.7 1.7 .4 .4 .4 .4 .3 .3 .4 .4 .3 .9 .7 .7 .5 .5 .3 .5 .3 0.4 2... .9 1.5 1.3 5 .4 6 .3 8 .5 9 . 1 10 11 12 13 15 16 18 19 20 .9 :t .9 .9 .9 1.5 1.5 1.5 1.5 21. 1.5 1.5 1 5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 22 25 28 29. 142131°— 21— wsp ■:f47- 34 SURFACE WATER OF PACIFIC SLOPE, SOUTHERI^^ CALIFORNIA. Combined daily discharge, in second-feet, of Cottonwood Creek and Dulzura conduit near Dulzura, Calif., for 1909-1915 — Continued. Day. Apr. 1912-13. 0.0 .0 .0 .0 .0 .0 .0 .0 .0 .2 .3 .3 .3 .4 .5 .9 .9 .9 .9 1.9 .9 .9 .9 .7 1.0 1.2 1.3 1.0 1.2 2 3 4 5 6 8 9 10 11.. 12 . . . . 13 14 15 16 17 18. 19 20... 21 22. 23 24 25 26. 27 28 29 30 31 ... 1913-14. 1 . 2 3 . . .. 4 6 8 9 10 . . 11 12 13 14 15 16 17 18 0.7 .7 1.6 1.7 1.2 1.1 1.1 1.1 1.1 1.2 1.2 1.2 1.5 19 20 21 22 23 24 25 26 27.. 28 29 30 . . . 31 1.8 1.4 1.1 1.1 3.6 3.2 6.4 5.6 5.0 5.6 5.0 4.1 3.0 3.8 4.4 1.3 1.3 1.7 10.2 7.6 6.3 5.4 4.2 4.7 15.6 12.7 8.9 7.1 5.7 5.7 5.3 4.4 3.3 3.3 3.0 3.0 2.5 2.2 4.8 4.1 2.0 1.4 3.5 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 7.0 7.6 6.2 7.9 7.0 5.9 5.6 5.0 5.6 5.6 24.1 94 33.4 19.8 15.8 2.2 2.2 2.2 2.2 2.6 3.8 4.3 5.1 4.3 3.0 3.0 3.0 2.4 1.7 1.2 1.2 1.2 1.2 1.4 4.2 5.1 61.8 22.6 14.5 25.1 32.2 29.8 13.3 11.9 11.2 9.5 8.3 8.3 7.6 7.0 6.7 6.2 5.6 5.6 5.0 3.5 9.3 6.8 48 65 477 240 76 48.8 38.4 32.6 26.3 24 15.5 16.7 15.3 15.9 18.0 14.6 15.2 15.2 15.9 21.0 18.0 20.6 18.6 15.2 13.1 16.6 15.2 14.7 18.0 15.9 18.0 20.4 18.7 17.2 15.8 22.1 34.6 52.9 22 19.8 18.9 17.5 15.6 14.6 13.6 13.3 12.1 12.1 12.1 10.6 10.6 7.7 7.7 7.7 7.7 7.7 7.7 8.3 11.3 11.0 11.8 14.3 14.3 56.8 52.3 51.9 48.2 49.0 48.8 50.0 49.8 49.8 49.8 49.0 47.1 50.1 50.3 39.5 42.8 46.3 39.3 39.2 37.4 37.0 37.0 37.0 34.8 34.8 34.8 13.0 10.3 8.3 7.7 7.0 5.2 5.2 3.8 3.6 3.1 2.4 14.4 18.4 19.5 10.2 8.2 9.2 10.9 TIA JUANA RIVER BASIF. 35 Combined daily discharge, in second-feet, of Cottonwood Creek and Dulzura conduit near bulzura, Calif , for 1909-1915— Continued. Day. Apr. May. Aug. Sept. 1914-15. 1 2 0.35 3 .35 4 .35 5 .35 6 .35 7 .35 8 .35 9 .35 10 .35 11 .35 12 1.2 13 .7 14 .56 15 .56 16 .56 17 ... 1.3 18 1.7 19 6.6 20 6.6 21.. 4.9 22 3.5 23 2.8 24 2.5 25 1.9 26 ... 1.16 27 1.63 28 2.1 29 2.0 30 1.9 31 1.9 1.7 1.16 1.63 .7 1.9 2.3 2.8 3.4 3.0 3.5 3.1 3.1 3.1 3.1 3.4 3.1 2.8 2.8 2.0 2.8 12.6 7.2 7.1 5.7 7.9 191 34 31 26 127 462 194 136 127 108 84 83 128 147 148 155 310 227 189 166 147 131 120 111 42 43 28 27 21 21 20 19.9 19.9 19.9 19.6 18.6 18.2 17.6 16.7 16.0 158 15.5 14.7 14.4 14.4 13.8 13.3 12.9 12.9 11.4 11.5 11.5 10.7 10.0 10.3 9.4 9.4 7.4 7.5 7.0 6.5 6.7 5.8 5.9 6.1 6.2 6.1 6.0 4.5 4.0 1.7 1.6 1.9 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.3 2.8 2.7 3.0 3.6 4.4 4.4 4.2 4.0 3.9 Note. — Both creek and conduit were dry on days for which discharge is not given. 36 SUKFACE WATEE OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Comhined monthly discharge of Cottonwood Creel and Dulzura conduit for 1909-1915 • Month. Discharge in second- feet. Run-Off (in acre- feet). Month. Discharge in second- feet. Run-ofE (in Maxi- mum. Mini- mtun. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1909. January . 637 275 562 186 40 14 2.6 22 10 10 36 48 43 17 3.1 .0 .0 .5 114 113 146 87.5 27.3 8.98 .855 2.95 2.10 7,010 6,280 8,980 5,210 1,680 534 52 181 125 1911-12. April . 160.5 44.7 4.6 1.5 17.5 5.3 .3 .0 45.3 14.9 1.34 .19 2 700 February March May. . . '9I6 June 79 7 April July 11 7 Mav The year 1912-13. November December January. . June 261 .0 9.10 6,610 July August 1.3 1.3 15.6 61.8 52.9 56.8 34.8 .6 .0 .7 1.3 1.2 13.1 34.8 .4 .0 .0 .91 1.52 4.53 10.0 19.1 43.6 8.38 .34 2.83 September 54 93 279 The period . . 637 .0 43.0 30,800 February March . 555 1 170 1909-10. 11 34 242 245 75 122 65 13 1 .1 .5 2.5 8 33 31 22 8.8 .7 .1 .0 1.55 9.07 33.9 81.5 40.2 39.6 28.2 5.84 .50 .01 95 540 2,080 5,010 2,230 2,430 1,680 359 30 1 Gctober April 2' 590 November May 515 December June 20 January . . September 168 February March. The year 1913-14. November December January 61.8 .0 7.54 5,440 April May 1.7 6.4 94 477 22 38 14.3 2.0 .0 1.1 1.4 3.5 7.7 1.8 .7 .0 .51 2.68 9.77 43.5 11.8 9.17 4.59 .61 June July 165 The year 245 .0 20.0 14,500 February March 2,420 726 1.2 7.7 3.1 23 97 78 26 1.5 1.7 .0 1.3 1.8 2 12 9.5 6.8 .7 .0 .24 2.78 2.20 7.95 35.9 25.9 10.7 .98 .49 15 165 135 489 1,990 1,590 637 60 29 546 1910-11. October... . M^y 282 June November The year 1914-15, December January December January 477 .0 6.63 4,810 February March... 6.6 193 462 160 116 310 43 15.5 0.1 4.4 .0 .7 26 35 21 42 15.8 5.8 1.6 2.7 1.60 18.7 97.0 70.7 35.9 103 26.3 9.75 3.45 3.66 98 April. . . . 1,150 May February March 5,390 June 4,350 April 2 140 The year 97 .0 7.26 5,110 May .' 6!330 1,560 1911-12. 1.5 45.6 5.5 261 .1 1.5 3.8 7.3 1.04 10.7 4.55 31.2 64 658 262 1,920 July 600 December August 212 January September The year 218 February March . 462 .0 30.5 22,000 Note.— No flow in months for which discharge is not given; records therefore represent full years, ex- cept the year 1909. PINE VALLEY CREEK NEAR DTTLZURA.i CALIF. Location.— Just above junction with Cottonwood Creek, 1 mile above Barrett dam, in NW. i sec. 15, T. 17 S., R. 3 E., about 7 miles northeast of Dulznra, San Diego County. Drainage area. — About 120 square miles, or half the total drainage area of Cotton- wood Creek above Barrett dam. Elevation. — About 1,550 feet above sea level. Records available. — January 1, 1906, to December 31, 1907. Gage. — Staff fastened to a small tree a few hundred feet above mouth. Only occa- sional gage readings were obtained during 1907. Discharge measurements. — Made by wading near gage. Channel and control.— Bed composed of sand; shifting. Bight bank is high and rocky and not subject to overflow; at very high stages water may overtop left bank and flow in two channels. JDescribed as "near Jamul" in early water-supply papers. TIA JUANA EIVEE BASIN. 37 Extremes of discharge. — Maximum mean daily discharge 1906-7: 1,500 second- feet, March, 1906. Minimum discharge: Dry in August, 1906, and August 19 and 22 and September 10 to 19, 1907. Diversions. — None during the operation of the station, as Dulzura conduit was not completed until January, 1909. Regulation. — None. Accuracy. — All determinations of discharge considered fair. Daily discharge deter- mined by shifting-control method or by comparison Avith record of flow of Cotton- wood Creek near Dulzura . Disrhargc measurements of Pine Valley C ^eeh nea) Dulzura, Calif. Jor 1906-190S. Date. Made by- height. Dis- charge. Date. Made by— Gage height. Dis- charge. 1906. Jan. 5 W. V, Hardy Feet. Sec.-ft. 1.8 14.4 17.6 41 4 20 8.2 57 32 7.7 .24 6.7 14.6 27 55 31 39 90 1907. Mar. 20 Apr. 11 27 May 19 29 June 11 16 Dec. 16 1908. Jan. 16 27 Feb. 14 23 Mar. 12 21 Apr, 5 May 12 Nov, 18 Dec. 22 W. V.Hardy ... Feet. 4.32 4.35 4.20 3.95 3.90 3.75 3.77 3.33 3.40 3.74 3.88 3.80 Sec.-ft. 38 19 19 20 Feb. 3 15 Mar. 11 :::.!do.".'.";."]:;!."!"!" do do do do do do C. H. Lee 3.10 3.20 3.45 2.94 3.12 3.00 4.50 4.40 4.20 4.00 4.21 4.30 4.45 4.60 4.30 ' 4.30 4.58 do do do do Clapp and Hardy N.L.Hall 51 30 17 13 14 10 Apr. 19 May 8 June 22 W. V. Hardy 3.2 do do do do do do do do do do Oct. 5 W.F.Martin 5.3 Nov. 27 Dec. 15 1907. Jan. 5 15 Feb. 7 27 Mar. 8 W.V.Hardy do do do do do do 20 24 20 13 10 7.2 4.1 .91 2.1 Daily gage height, in feet, / Pine Valley Creeh nea) Dulzura, Calif ., J or 1906. Day. Jan. Feb. Mar. Apr. May June, July. Aug, Sept. Oct. Nov, Dec. 1 . . 3.00 2.95 2.95 2.95 2.96 3.24 3.15 3.07 3.09 3.01 3.11 3.01 3.01 3.09 4.02 3.60 3.40 3.30 3.28 3.20 3.21 3.22 3.19 3.08 3.01 2.96 2.94 2.97 3.00 3.00 2.98 3.00 3.04 2.98 2.92 2.93 2.92 2.95 2.97 4.35 5.00 4.03 3.70 4.04 3.95 3.60 3.50 3.38 3.31 3.35 3.30 ■■5.'26' 4.82 4.80 5.00 4.90 4.90 4.75 4.75 4.80 4.75 4.80 4.70 4.65 4.65 4.60 4.55 4.60 4.55 4.55 4.50 4.50 4.50 4.50 4,50 4.45 4.45 4.50 4.50 4.50 4.50 4.50 4.65 4.75 4.65 4.55 4,55 4.50 4,50 4,55 4.50 4.50 4.40 4.40 4.40 4.35 4.40 4.40 4.40 4.40 4.40 4.35 4.35 4.30 4.30 4.30 4.40 4.40 4.40 4.40 4.50 4.45 4.50 4.50 4.40 4.40 4.40 4.35 4,35 4.30 4,30 4.30 4.30 4.30 4.30 4.30 4.25 4.20 4.20 4.20 4.20 4.20 4.20 4.20 4.15 4,15 4,10 4.20 4.15 4.15 4.15 4.15 4.15 4.20 4.15 4.15 4.12 4.12 4.11 4,12 4,13 4,10 4,20 4.20 4,22 4,20 4.17 4.15 4.12 4.12 4.10 4.11 4.10 4.10 4.11 4.10 4.07 4.05 4.06 4.06 4.05 4.05 4.05 4.04 4.03 4.02 4.02 4,02 4.01 4.01 4.00 3.95 3.93 3.80 3.79 3.76 3.65 3.60 3.55 3.48 3.40 3.37 3.00 2.70 4.40 4.40 4.20 4.20 4.20 4.20 4.19 4.18 4.18 4.18 4.16 4.10 4.00 4.00 3.95 3.95 3,95 3.95 3.94 3.94 4.00 4.00 3.98 3.98 4.00 4.00 4.09 4.08 4.12 4.02 4.05 3.96 4.05 4.03 3.98 4.02 3.91 4.01 4.03 4.00 4.04 3.98 3,92 4,00 3.94 4,03 4,10 3.98 3.80 3.55 3.60 3.70 3.75 3.80 4.00 4.00 4.05 4.05 3.95 3.95 4.00 4.00 4.10 4.05 4.10 4.10 4.05 4.10 4.05 4,00 4,10 4.10 4.10 4,00 4.10 4,10 4.05 4.05 4.00 4.10 4.10 4.10 4.10 4.10 4.10 4.05 4.10 4.10 4.05 4.10 4.10 4.10 4.10 4.05 4.05 4.10 4.10 4.20 4.20 4.20 4.20 4.20 4.20 4.10 4.15 4.15 2 4 20 3 4.20 4 4 20 4.20 6 4.25 7 4.25 8 4.25 9 4.25 10 4.20 11 4.25 12 4.30 13 4.45 14 4.45 15 4.30 16 4.30 17 4.20 18 3.66 3.20 3.45 3.25 3,20 3.18 3.10 3.08 3.05 3.03 3 03 3.03 3.03 3.03 4.20 19 4.30 20 4.20 21 4.20 22 4 15 23 4.20 24 4.20 25 4.20 26 4.20 27 4.30 28 4.70 29 4.60 30 4.50 31 . 4.50 38 SURFACE WATER OF PACIFIC SLOPE, SOUTHERT^ CALIFORNIA. Daily discharge, in second-feet, of Pine Valley Creeh near Dulzura, Calif , for 1907. Day, 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 63 55 57 55 55 60 124 75 108 100 90 90 83 76 72 68 56 Apr. May. Aug. Sept. 1.2 1.2 1.2 1.6 1.7 2.2 2.5 2.1 2.5 2.1 2.0 1.8 1.8 2.8 3.5 5.0 6.0 7.0 6.0 4.0 2.8 3.3 3.7 4.0 3.0 2.8 2.8 4.0 3.0 4.0 3.0 3.0 3.0 3.0 3.0 3.0 2.9 2.8 2.8 3.0 3.0 2.8 2.8 2.8 2.9 2.9 3.5 3.5 3.4 3.3 3.2 3.0 3.0 3.2 3.0 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 3.0 3.0 3.6 3.5 3.4 3.6 3.5 3.4 3.3 3.3 3.2 3.1 3.2 3.3 3.4 3.4 3.4 3.4 3.8 3.9 4.0 4.0 Note. — Discharge January to June, computed by shifting-control method; July to December inter- polated by comparison with record of flow of Cottonwood Creek near Dulzura. Monthly discharge of Fine Valley Creek near Dulzura, Calif, for 1906-7. Month. Discharge in second- feet. Run-oflf (total in acre- feet). Month. Discharge in second- feet. Run-ofl (total in Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1906. January 41 75 1,500 150 71 32 8.2 32 2.7 1 5 3 44 15 1.8 .6 .0 .2 10.4 19.4 156 89.6 39.4 9.8 2.6 4.0 .6 640 1,080 9,590 5,330 2,420 583 160 246 36 1906-7. January 124 45 119 71 30 16 3 1.3 8 19 26 36 27 12 3 1 49.3 34.8 62.4 45.0 19.8 10.0 2.0 .6 .3 3 030 February March.. February 1,930 3 840 April April 2,680 May. May. 1 220 595 July July 123 37 September September The year 18 20,100 20.6 14,900 1907. October 1906-7. October . . . 1.8 6.5 114 .0 .3 4.2 .8 2.6 20.1 49 155 1,240 7 3.5 5.1 1.2 2.8 2.8 3.1 3.0 3.4 191 November December November December 179 209 Note.— Discharge January, 1906, to June, 1907, determined by the shifting-control method, rest of 1907 discharge was estimated by comparison with record of flow of Cottonwood Creek. TIA JUAI^A EIVER BASIN^. 39 DTTLZURA CONDXTIT NEAR DXTLZITIIA,! CALIF. Location. — ^About 12 miles below intake and 2 miles southeast of Dulzura, San Diego County. During 1909 and 1910 station was 1| miles below intake. Records available. — ^January 1, 1909, to September 30, 1915. Gage. — Lietz water-stage recorder at weir. Discharge. — Computed from gage-height record at an 8-foot rectangular steel plate weir about 1| miles above lower end of conduit. Accuracy. — Record considered good. Water-stage recorder is checked twice each day by patrolman. The seepage loss between intake and measuring weir is estimated at about 3 per cent. Cooperation. — Record for 1911 furnished by Southern California Mountain Water Co., through M. M. O'Shaughnessy, chief engineer. Records for 1912-15, fur- nished by City of San Diego, through the Department of Water. Records are furnished in million gallons per day. Determinations of daily discharge con- verted into second-feet and monthly discharge computed by the U. S. Geological Survey. Later records are withheld by City of San Diego on account of pending litigation. Dulzura conduit (PL XVIII, C) diverts water from Cottonwood and Pine Valley creeks about half a mile above their junction. The conduit is 13.38 miles long and is concrete lined except in 4,490 feet of flume and 9,219 feet of tunnel. The average width is about 5 feet and the depth 4 feet 2 inches. The grade is 4 feet in 5,000 and the capacity 40 million gallons per day (62 second-feet). The water, which is stored at Morena reservoir, flows down the natural channel of Cottonwood Creek about 6| miles to the intake of the conduit. The flow of Pine Valley and Lyons Valley creeks is also diverted into the conduit. From the conduit the water flows down the natural channel of Dulzura Creek into Lower Otay reservoir, where it is diverted for munic- ipal use at San Diego. Discharge measurements of Dulzura conduit near Dulzura, Calif., for 1909-1915. Date. Made by— Gage height. Dis- charge. Date. Made by- Gage height. Dis- charere. 1909. Feb. 24 W. V. Hardy Feet. 3.40 3.40 3.70 1.65 .45 .49 .62 Scc.-Jt. 52.0 51.0 54.2 16.2 .9 1.1 2.3 1909. Jan. 25 25 25 25 25 25 25 Mar. 13 June 5 W. V.Hardy do do do do do do do do Feet. 0.94 1.26 1.56 2.23 2.75 3.28 3.50 1.85 .37 Sec.-ft. 24 Apr. 21 May 27 1910. Jan. 25 25 25 do Clapp and Hardy W. V . Hardy 12.0 18.0 26 do do do 38.0 48.0 53.0 19.0 .8 1 Described as near ' 'Jamul" in early water-supply papers. 40 SUKFACE WATER OF PACIFIC SLOPE. SOUTHEEN CALIFORNIA. Daily discharge^ in second-feet, of Dulzura conduit near DuJzura, Calif., for 1909-1915. Day. Jan. Feb. Mar. Apr. May. June. July. 1909. 1 2 3 4 5 () 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 A.b 3.2 2.1 7.3 40.0 26.6 21.5 16.6 11.8 8.8 7.3 5.9 23.2 23.2 28.4 42.0 37.0 32.1 32.1 38 44 44 44 42 39 37 42 40 40' 42 49 49 49 39 43 50 49 50 50 50 50 48 42 55 50 50 51 50 50 47 52 50 45 45 •44 44 44 44 48 43 "*i8.'2" 52 52 53 49 52 51 54 54 56 56 56 56 58 52 52 56 56 56 56 56 56 56 54 56 56 56 56 56 50 48 48 44 42 42 48 34 32.1 36 32.1 30.2 30.2 28.4 28.4 30.2 26.6 24.9 26.6 24.9 28.4 28.4 24.9 24.9 23.2 23.2 2.3.2 21.5 21.5 21.5 21.5 21.5 21.5 18.2 18.2 10.6 16.6 16.6 15.0 11.8 10.3 8.8 10.3 8.8 10.3 10.3 10.3 10.3 10. 3 8.8 10.3 8.8 7. .3 7.3 7.3 5.9 7.3 8.8 7.3 5.9 .5.9 3.2 3.2 3.2 2.1 2.1 2.1 2.1 0.7 1.1 .6 ■.\ .4 7 8 .4 .3 9 .2 10 11 : 12 13 .2 14 15 16 17. 18 19 20 21. 22 23 24 25..., 26 16.6 15.0 24.9 21.5 26.6 28.4 27 28 29 30 31 Day. Dec. Jan. Feb. Mar. Apr. May. Jnne. 1909-10. 1 20.6 42 49 42 37 39 36 36 37 37 36 33 32.1 31.1 31.1 34 32.1 28.4 30.2 34 52 38 38 36 32.1 34 30.2 30.2 27.5 20.6 25.7 24.9 24.0 23.2 23.2 23.2 23.2 of- 19.8 19.8 19.8 19.0 20.6 21.5 24.9 34 30.2 26.6 23.2 26.6 30.2 24.9 28.4 55 50 53 54 54 ■■"ii.'s" 35 38 36 32.1 30.2 30.2 30.2 26.6 42 33 28. 4 24.9 21.5 20. 6 18.2 17.4 17.4 15.0 14.2 2.6 11.0 9. 5 8.0 9.5 9.5 10.3 10.3 11.8 11.8 11.0 9.5 8.8 7.0 6.2 5.9 5.9 5. 6 4.5 4.5 4.5 .5.2 4.8 3.2 2.6 2.6 5.2 4.5 3.8 3.2 2.1 1.6 1.6 1.4 .9 .7 .4 .4 0.4 2 .5 3 16.6 50 49 54 58 56 56 56 55 56 53 51 52 54 52 56 56 56 56 50 50 47 45 45 43 40 .5 4 .5 5 .5 6 7.3 6.6 8.8 27.5 51 30.2 16.6 12.6 11.0 9.6 8.0 6.6 5.9 5.9 24.0 52 35 32. 1 30. 2 28. 4 24.0 23.2 20.6 20. 6 20.6 29.3 4 7 .4 8.. 4 9 .3 10 .2 ,2 ,2 13 .1 14 .2 15... 16 17... 18 19 20 21 22 23 24 25 26 27.. . 30 31 TIA JUAISTA EIVEK BASIN. 41 Daily discharge, in second-feet, of Dulzura conduit near Dulzura, Calif., for 1909-1915 — Continued. Day. Dee. Jan. Feb. Mar. Apr. Day. Dee. Jan. Feb. Mar. Apr. 1910-11. 1 19.2 16.3 32.7 65.1 62.1 37.4 20.0 47.9 42.5 40.5 37.4 32.7 18.1 50.7 47.9 24.0 32.7 42.5 65.1 32.7 24.0 24.0 28.2 32.7 59.2 37.4 37.4 28.2 24.0 20.7 8.4 20.0 16.3 13.0 9.8 9.8 24.0 16.3 13.0 11.4 9.8 9.8 9.8 8.4 8.4 1910-11. 16 20.0 4.6 16.3 7.0 7.0 4.6 4.6 7.0 13.0 4.6 14.4 7.0 4.6 7.0 13.0 9.9 42.5 32.7 28.2 26.0 24.0 20.0 13.0 9.8 9.8 14.2 13.0 35.1 28.2 19.2 18.6 17.0 14.5 14.2 13.5 16.3 14.5 13.2 13.2 13.0 12.4 11.0 10.5 8.4 8.4 7.0 2 17 7.0 3. 18 7.0 4 19 7.0 5 20 7.0 6 21 7.0 7 22 7.0 s 23 5.8 9. .. 24 5.8 10 25 5.8 11 26 5.8 12 27 0.4 .4 .4 .4 .4 5.8 13 28 29 5.8 14 5.8 15.. . 4.6 30 5.8 31 Day. i Jan. Feb." Mar. Apr. May. June. Day. Jan. Feb. Mar. Apr. May. June. 1911-12. 1. 3.6 3. C 3.6 3.6 3.6 3.6 4.2 4.2 4.2 3.6 3.6 3.6 2.9 2.9 2.9 5.3 8.2 7.8 8.5 7.2 16.1 12.9 8.8 10.7 39.7 35.0 22.4 42.8 38.1 29.7 38.5 30.8 24.0 21.1 20.0 20.7 17.8 15.8 17.8 21.5 37.3 47.5 43.8 43.8 42.8 16.1 15.8 15.8 14.4 14.4 13.2 13.2 26.8 40.9 29.7 22.4 19.2 16.8 14.8 13.2 4.2 3.6 2.9 2.4 1.8 1.8 1.5 1.5 1.5 1.5 1.5 1.2 1.2 1911-12, 16 38.5 40.9 40.1 41.4 38.9 7.2 5.3 4.8 4.2 4.2 3.9 4.8 4.5 4.2 4.2 4.2 2.9 2.9 2.9 2.9 2.9 2.6 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.8 20.0 17.8 15.8 14.4 13.5 17.8 22.4 16.1 14.8 13.2 13.8 20.4 17.2 15.8 33.9 42.8 41.4 45.7 44.7 41.8 40.9 37.3 31.8 27.7 24.4 22.0 21.5 22.8 20.7 18.1 17.2 11.9 11.3 10.7 9.9 9.2 9.2 9.2 8.5 8.5 7.8 7.8 7.2 7.2 5.9 5.3 4.8 2::::::;:::::::::: 17 3.. 18 4 ; 19 5 1 20 6 21 7. 22 23 8 9. 24 10 1 25 11. 1 26 12 ; 27 13 28 14 ' 29 15. ; 20.7 30 31 Day. Jan. Feb. Mar. Apr. May. Sept. Day. Jan. Feb. Mar. Apr. May. Sept. 1912-13. j 1.2 1.2 1.2 1.2 1.2 2.4 2.9 3.6 2.9 1.8 1.8 1.8 1.2 .5 21.5 15.8 13.8 15.2 13.8 14.4 16.5 13.2 13.8 13.8 14.4 19.2 16.5 19.2 17.2 48.3 45.7 47.6 45.7 46.6 46.6 47.6 47.6 47.6 47.6 46.6 44.7 47.6 47.6 36.8 31.8 32.8 14.4 25.8 30.8 30.8 9.9 7.8 6.5 5.3 4.2 3.6 2.9 2.9 3.6 ""28." 6' 4.8 .5 1912-13. 16 13.2 10.3 7.2 5.6 4.2 4.2 3.6 2.9 2.4 1.8 1.8 1.8 1.8 1.8 1.5 1.2 "2.'4" 2.9 32.8 19.2 12.5 15.1 29.7 23.2 33.9 13.8 11.9 15.2 13.8 13.2 16.5 14.4 16.5 17.2 19.2 17.2 15.8 14.4 20.7 32.8 46.6 40.1 43.8 36.8 36.8 35.0 35.0 35.0 35.0 35.0 34.1 35.0 35.0 32.8 32.8 32.8 2.4 1.8 .9 .9 1.4 1.8 2 17 3 18 4 19 5 20 6 21 7 22 8... 23 9 24 . 10 8.5 5.9 4.8 3.9 2.9 2.9 25 11 26 12 27 13 28 .9 2.8 1.4 14 29 15 30 31 Note.— No flov/ from Oct. 1, 1911, to Jan. 14, 1912; and from June 14 to Sept. 30, 1912. 42 SUEFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Dulzura conduit near Dulzura, Calif., for 1909-1915 — Continued. Day. Dec. Jan. Feb. Mar. Apr. May. Day. Dec. Jan. Feb. Mar. Apr. May. 1913-14. 1.. . 3.6 2.9 11.3 9.9 9.2 7.8 7.2 6.6 6.6 5.9 5.3 5.3 5.3 4.8 4.2 4.2 3.6 20 17.8 17.2 15.8 14.1 13.2 12.2 11.9 10.7 10.7 10.7 9.2 9.2 8.5 7.8 11.9 9.2 7.8 7.2 7.2 7.8 7.2 6.6 5.9 5.3 7.2 6.6 5.3 4.2 4.2 11.9 12.6 10.7 8.2 7.2 6.6 5.3 5.3 4.2 4.2 4.2 4.2 3.6 4.2 4.5 1 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 913-14. . 5.3 . 5.9 . 4.2 . 5.9 . 5.3 4.2 4.2 8.6 4.2 4.2 5.3 17.8 42 30 17.8 13.8 2.1 7.8 5.3 35 46 48 38 48 42 35 30 24 22 7.8 7.8 6.6 6.6 6.6 6.6 6.6 6.6 7.2 7.8 7.8 9.9 9.9 10.7 13.2 13.2 3.6 2.8 2.8 2.4 1.8 1.2 6.6 13.2 17.2 36.9 18.4 9.2 7.2 7.8 9.2 4.2 2 3.6 3 2.8 4 1.8 5 2.4 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.4 6 2.4 1.8 4.8 4.2 3.6 4.2 3.6 2.9 1.8 2.6 3.2 .7 7 .2 8 9 10 11 .4 12 .4 13 14 15 ... . Day. Dec. Jan. Feb. Mar. Apr. May. Jirne. July. Aug. 1914-15. 1 1.0 .46 .93 .00 1.2 1.6 2.1 2.7 2.3 2.8 2.4 2.4 2.4 2.4 2.7 2.7 2.4 2.1 2.1 1.3 2.1 11.3 6.5 6.4 5.9 5.6 5.0 6.9 22 52 48 45 46 44 43 43 42 32 30 26 46 13.8 4.2 24 44 43 42 40 46 43 45 44 24 27 44 47 47 48 45 49 45 48 49 46 48 51 49 51 51 49 51 51 51 49 47 46 45 44 42 40 39 40 37 36 35 40 38 40 34 SO 28 27 27 26 25 28 27 25 24 22 21 20 14.4 ^ 17.1 32 28 22 20 20 18.8 20 41 45 41 43 35 32 29 39 51 52 52 52 51 53 51 50 48 45 36 40 44 34 43 51 47 50 51 49 49 50 49 34 22 48 48 45 42 42 40 38 37 36 36 37 35 34 31 29 27 25 25 24 23 23 22 20 19.2 18.4 17.8 17.1 17.1 17.1 17.1 16.8 15.8 15.4 14.8 14.1 13.5 13.2 12.9 12.2 11.9 -11.9 11.3 11.0 10.7 10.7 9.2 9.2 9.2 8.5 7.8 8.2 7.1 7.2 7.3 6.7 6.5 5.9 5.5 5.5 5.0 4.5 4.2 3.9 3.6 3.4 3.4 3.4 3. 5 3.6 2 3.6 3 2.3 4 1.7 5 1.4 6 1.2 7 8 9 10 11 12 13 14 15 16 17 18 19 5.3 5.3 4.2 2.8 2.1 1.8 1.2 .46 .93 1.4 1.3 1.2 1.2 20.. 21 22 23 24 25 26 . 27 28 29 30 31. .. Note.— Daily discharge 1909-10 determined from a rating curve well defined between 0.7 and 54 second- feet. Probably a small amount of water in conduit during May, 1911. Conduit dry on all days for which discharge is not given. TIA JUAN A RIVER BASIN. 43 Monthly discharge of Dulzura conduit near Dulzura, Calif., for 1909-1915. Discharge in second- feet. Maxi- Mini- mum, m^tun. Run-off (total in acre- feet). Discharge in second- feet. Maxi- mum. Run-off (totalin acre- feet). 1908-9. January February March April May June July 55 58 36 0.0 23.2 .0 34 15 2.1 .0 10.1 41 44.7 52.5 24.4 7.3 .16 6,210 22, 800 27,500 31,200 15,000 4,340 The period. 1908-10. December January ' February March April May June 52 58 52 55 42 11.8 .0 .0 27.5 19 .0 .4 .0 17.7 10,900 48.4 2,980 35.5 1,970 30.0 1,840 19.4 1,150 301 10 The year.. 1910-11. December . . . January February March April 20.0 65.1 8.4 5.8 4.81 31.0 1,720 1,450 562 The year.. 1911-12. January , February March April 41.4 4.2 42.8 47.5 .0 2.6 5.3 15.8 8.77 3.24 19.4 30.0 1,190 1,790 1911-12. May , June The year. 1912-13. January February March , April May, ^ t. The year 1913-14. December — January February March April May The year 1914-15. December — January February March April May June July August The year 4.8 .0 13.2 33.9 .0 .0 11.9 32.8 .0 .0 3.04 7.02 17.3 41.0 7.34 1.13 187 390 1,060 2,440 451 67 6.35 4.8 42 48 20 36.9 12.6 1.2 .0 1.13 6.47 17.1 10.4 8.13 3.63 398 950 640 484 223 48 3.82 5.3 52 48 51 51 53 37 12.9 3.6 .0 .0 4.2 30 14.4 22 13.2 3.4 .0 .942 6.76 38.1 44.2 28.3 45.4 23.0 7.46 .45 416 2,120 2,720 1,680 2,790 1,370 459 53 .0 11,600 Note — No flow in months for which records are not given. Records therefore represent complete years. MISCELLANEOUS MEASUREMENTS. Measurements of stream flow in the Tia Juana River basin at points other than those at which gaging stations are maintained are listed in the following table : Miscellaneous discharge measurements in Tia Juana River drainage basin. Date. Stream. Locality. Gage height. Dis- charge. Jan. 19, 1915 Tia Juana River. do . 2J miles above Tia Juana, Mexico Feet. Sec.-ft. 0.8 Apr. 6, 1915 Apr. 10,1915 Apr. 6, 1915 Apr. 10; 1915 Tia Juana, Mexico 44 do do 36 . ..do Mouth . . 37 do do 26 Dec. 19,1913 Apr. 5, 1915 Cottonwood Creek do 1.5 Marron Valley 0.30 .18 .09 12 Oct. 1, 1915 do Near Campo .8 Oct. 8, 1915 ..do do .6 Jan. 27,1916 do... Morena reservoir 15, 356 Mar. 10,1918 do SW.J sec. 23, T. 18 S., R. 2 E., near Cotton- wood. 5.1 a Computed from data collected at reservoir by Geo. Cromwell, city engineer, San Diego. 44 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. SWEETWATER RIVER BASIN. GENEBAL FBATUBES. Sweetwater River rises in the south and east slope of the Cuyamaca Mountains of the Coast Range, flows nearly due south for a distance of 15 miles, then turns to the west and southwest and discharges into San Diego Bay south of National City. Its length is 45 miles and its drainage area comprises about 215 square miles, the greater part of which is in mountainous country. The basin is extremely narrow. It lies directly south of San Diego River and north of the Otay and Cottonwood Creek basins. The topography is not so rough as that of San Diego River basin, although the mountains and foothills extend within 3 or 4 miles of the shore line of San Diego Bay, and the vaUey and mesa lands are not so extensive as along San Diego River. The basin is poorly forested. The timber is confined almost entirely to the immediate valleys of the streams and to the higher mountain regions. The mountain slopes are fairly well covered with brush, but the lower foothills are almost bare, supporting only a sparse growth of low brush. The mean annual rainfall ranges from 10 to 15 inches along the foot- hill belt and from 20 to 45 inches in the mountains. A considerable area lying between San Diego Bay and the foothills south from National City to the Mexican boundary is under a high state of cultivation. The greater part of this land is irrigated by water taken from Sweetwater River. The celebrated Sweetv/ater dam is on Sweetwater River about 8 miles above its mouth at an elevation of 145 feet. (See PI. VII, A.) There are two other reservoir sites on Sweetwater River, one a short distance above the Dehesa post office and another 1 mile below Des- canso, at an elevation of 3,340 feet above sea level. During thfe extremely dry period from 1898 to 1904 there were years when no water from Sweetwater River reached the reservoir. From 1899 to 1904 the reservoir was dry, and to tide over this period of drought pumping was resorted to. Wells were sunk in the reser- voir site, and pumps installed, by means of which water was delivered to the distribution system. Pumping was also extensively carried on in the vaUey along the river below the reservoir. It is probable that the construction of additional storage reservoirs on the upper reaches of the river would serve to tide over an extended dry period. GAGING-STATION BECORDS. SWEETWATER RIVER NEAR DESCANSO, CALIF. Location.— In SE. I sec. 25, T. 15 S., R. 3 E., at Ellis ranch, 2 miles below month of Gnatay Creek, and IJ miles below Descanso, San Diego County. Drainage area. — 43.7 square miles (measured on topographic maps). Elevation.— About 3,300 feet above sea level. U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 447 PLATE VII A. SWEETWATER DAM, SEPTEMBER 17, 1918. ill' B. LAKE HODGES DAM, SAN DIEGNITO RIVER. TJ. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 447 PLATE VIII MURRAY DAM, MARCH 9, 1918. A, Upstream side; B, downstream side. SWEETWATER RIVER BASIN. 45 Records available. — November 21, 1905, to September 30, 1918. Gage. — Staff in tliree sections on left bank a short distance below intake of Ellis ditch. Gages previously used have been at about same site, but original datum has not been maintained. Discharge measurements. — Made from cable just below gage or by wading. Channel and control. — Sand and fine giavel; shifting. Banks high and not likely to be overflowed. October 11, 1914, a concrete control was constructed across channel opposite gage. (See PI. VI, B.) It was wrecked by the flood on Janu- ary 27, 1916, and has not "been rebuilt. A section of this control and a few large boulders serve as incomplete control. Extremes of discharge.— 1905-1918: Maximum stage January 27, 1916, not known (discharge, 9,870 second-feet); no flow during parts of 1910, 1911, 1913, 1914, and 1916. Diversions. — About 0.3 second-foot is diverted above gage for irrigation on Ellis ranch. Regulation. — None. Accuracy. — Stage-discharge relation not permanent. Rating curves usually appli- cable only for short periods. Gage read to hundredths twice daily. Daily dis- charge ascertained by applying mean daily gage height to rating table, by shifting- control method or, by interpolating between dis charge measurements. Records fair. Discharge measurements of Sweetwater River near Descanso, Calif., for 1905-1918. Date. Made by- Gage height. Dis- charge. Date. Made by- Gage height. Dis- charge. 1905. Feet. Sec.-fL 1907. Feet. Sec.-ft. Sept. 11 D.W. Murphy O0.4 Apr. 9 W. V.Hardy 4.30 49 Nov. 21 C.H.Lee . 3.54 1.1 25 do 4.10 26 Dec. 10 ....do 3,62 2.5 May 18 do 3.82 18 1906. Jan. 6 30 do 3.68 15 W. V. Hardv- . 3.62 . 3.79 . 3.68 . 4.60 . 4.50 2.7 9.3 4.8 115 96 June 14 23 July 23 Dec. 15 31 do do W.A.Larab 3.52 3.30 3.30 3.29 3.27 11 23 Feb. 4 15 16 do do do do 2.5 2.5 W.V.Hardy 4.7 do 3.3 16 do . 4.40 75 1908. Jan. 15 26 27 28 Feb. 11 11 11 12 22 24 Mar. 3 16 do do do do do do . 4.30 . 4.20 . 4.10 4.00 3.90 . 3.88 62 51 46 32 20 10.7 W V Hardy . 3.41 3.50 3.41 3.60 3.50 5 9 16 17 19 Mar. 10 do do do do do do do do do do 10 7.9 13 12 Apr. 5 6 18 20 May 8 June 19 do do do do do C. H. lee. . 4.85 . 4.65 . 4.27 - 4.20 - 4.05 3,60 81 74 37 35 24 4.3 3. GO 3.82 3.49 3.50 3.52 17 36 9.8 12 9.4 Aug. 7 R.S. Hawlev. . 3.16 . 3.15 . 3.20 . 3.48 1.1 1.1 4.4 12.7 11 20 22 Apr. 3 do do..... do..., do 3.50 3.42 3.43 3^^ 44 Oct. 9 W. F.Martiii. 9.1 Nov. 28 W. V. Hardy 4.2 Dec. 13 do :.. 4.3 4.7 1907. 13 3.44 3.7 Jan. 4 W.V.Hardy . 3.58 9.60 28 3.33 4.0 12 do.... . 4.00 49 May 7 3.32 4.9 ^ 13 do . 4.10 49 13 ao — 3.32 5.0 Feb. 6 do . 4.00 26 27 do 3.16 1.8 9 do . 3.90 22 June 13 do 3.10 1.1 25 do . 4.12 27 July 7 do 2.98 .36 « 28 do 4.08 25 Nov. 16 do 3.11 .78 Mar. 7 do . 4.80 95 Dec. 8 do 3.21 1.5 19 do . 4.20 43 19 do 3.21 1.4 a Weir measurement. 46 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Discharge measurements for Sweetwater River near Descanso, Galif., for 1905-1918 — Continued. Made by— W. V. Hardy. do... do... do... do... do... do... Hardy and Clapp W.V.Hardy. R. E.Haines.. W. V. Hardy do... do... do... do... do... do... do... do... do... do... do... .....do... .....do... do... do C.C.Jacob... W. V. Hardy W. V. Hardy do .....do do F. C. Ebert.. F. C. Ebert do.... do.... do...- do.... do.... do.... do.... .....do.... do... do.... F. C. Ebert do H. D.McGIashan.. F.C. Ebert do do F.C. Ebert.... W. E. Keenan. F.C. Ebert.... H. D.McGIashan. F.C. Ebert. do... do... Gage height. Feet. 3.9 4.8 4.4 4.6 4.08 4.2 4.3 4.1 4.1 3.75 3.64 4.20 4.10 3.95 3.93 3.94 3.92 3.88 3.86 4.02 4.12 4.10 4.08 3.98 3.92 3.84 3.68 3.70 4.12 3.85 3.77 3.58 3.62 3.82 3.73 4.12 4.14 4.12 4.12 3.74 3.78 3.76 3.64 3.70 4.15 3.87 3.61 3.46 3.89 3.89 3.91 3.67 3.52 3.58 3.24 3.23 .80 .82 Dis- charge. See.-ft. 15.1 12.4 76 81 27 39 49 9.8 7.8 32 22 12 13 9.2 8.8 6.7 7.6 17 20 6.7 5.7 4.6 3.4 2.4 1.2 .34 1.3 24 4.6 2.3 a. 7 3.2 1.9 14 15 9.1 10 .8 1.6 1.9 2.4 12 6.3 1.6 .4 .07 10 4.4 1.8 2.6 6.05 6.05 1.7 1.8 1915. Jan. 27 Feb. 1 4 5 Mar. 5 5 29 Apr. 4 May 18 July 8 8 Aug. 13 Sept. 18 Oct. 6 Dec. 7 1916. Feb. 6 18 19 Mar. 13 18 19 Apr. 13 22 24 May 7 8 June 11 17 July 16 Aug. 13 15 Dec. 14 1917. Jan. ?3 Feb. 14 19 20 .Mar. 13 28 Apr. 15 16 16 16 17 17 18 May 23 June 28 Dec. 22 1918. Jan. 1 9 13 27 Feb. 11 20 22 Mar. 7 13 19 19 May 7 Aug. 22 Made by- F. C. Ebert do do do do do .....do do do do do K.W. Dav F. C. Ebert R. W. Dav. F. C. Ebeft F. C. Ebert ...do ...do ...do ...do ...do ...do ...do ...do ...do ...do ...do ...do R. W. Day, do.. F.C. Ebert .do .do..... .do ...do "[ido!!!!;;!!!!!!!!!;;! ....do ....do McGlashan and Ebert. ...do ....do F. C. Ebert ....do ...do D. A. McClung F.C. Ebert Ebert and Ellis H.D.Ellis.. do do .....do do do do do F.C. Ebert. H.D.Ellis.. .....do do F.C. Ebert. H. D. Ellis.. F.C. Ebert. height. Feet. .88 1.53 1.67 1.61 1.93 1.91 1.47 1.36 1.92 1.15 1.15 1.09 .94 .92 1.08 1.50 1.45 1.00 1.04 .88 .78 .79 .75 .50 1.00 .82 .82 .87 .67 .75 .20 .40 .52 .51 .69 .58 .54 .82 1.16 1.72 1.00 -.20 .00 .46 .17 .12 .17 .54 .27 .56 .25 1.52 1.41 1.65 .67 .46 -0.16 Dis- charge. Daily discharge, SWEETWATER RIVER BASIl^^T. 47" \ second-feet, of Sweetwater River near De?canso, Calif, for 1907-1918. 3.0 3.0 3.0 3.0 3.0 4.1 4.1 3.0 3.0 3.0 3.0 3.0 3.0 12 8.9 5.3 5.3 4.1 4.1 4.1 4.1 5.3 7.7 7.7 6.5 5.3 5.3 4.1 4.1 3.0 3.0 Nov. Dec. Jan. Feb. Mar. Apr. 1.9 1.9 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 1.9 1.9 3.0 3.0 3.0 6.5 5.3 4.1 4.1 6.5 5.3 4.1 4.1 4.1 4.1 4.1 4.1 4.1 4.1 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 4.1 4.1 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 10 6.0 3.0 2.0 2.0 2.0 2.0 2.0 2.0 6.0 8.0 12 10 8.0 13 11 7.0 7.0 June. July. Aug. Sept. 15 13 12 10 12 13 10 8.9 7.7 7.7 7.7 7.7 7.7 7.7 7.7 7.7 7.7 6.5 6.5 6.5 6.5 6.5 6.0 6.0 6.0 6.0 5.5 5.3 5.3 5.3 5.5 6.0 6.0 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.5 4.8 4.6 4.1 3.7 3.7 3.7 3.9 3.9 3.9 3.7 3.7 3.4 48 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Sweetwater River near Bescanso, Calif., for 1907-1918 — Continued. Day. Apr. July. 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.5 2.0 1.5 1.5 1.5 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1. 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.4 1.4 1.4 1.4 1.4 1.4 1.4 l.S 2.2 2.7 9.5 18 4.4 3.2 3.2 2.7 2.2 2.2 11 506 13 11 18 29 21 18 18 100 61 55 117 156 177 108 91 75 61 55 49 44 145 115 89 60 31 2.7 2.2 2.2 1.7 1.4 1.4 1.1 3.2 4.4 4.4 29 25 . 25 25 21 21 21 21 21 21 21 21 39 44 75 166 126 117 108 108 91 75 34 34 29 29 29 29 29 29 29 29 29 25 21 21 21 18 18 18 15 13 9.5 9.5 9.5 9.5 9.5 9.5 8.0 8.0 8.0 8.0 8.0 8.0 8.0 7.0 7.0 7.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 .5.2 5.2 5.2 5.2 5.2 5.2 4.4 4.4 4.4 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 4.4 4.4 3.8 3.8 3.8 3.5 3.8 3. J 3.8 3.8 3.2 3.2 3.2 3.2 3.2 3.{ 3.8 3.8 3.8 3.8 3.8 3.8 3.8 4.4 3.8 3.8 3A 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3. J 3.8 4.4 5.2 6.0 6.0 6.0 6.0 8.0 6.0 5.2 5.2 4.4 4.4 4.4 4.4 4.4 4.4 15 11 8.0 7.0 6.0 6.0 5.2 5.2 5.2 6.0 6.0. 6.0 6.0 91 29 6.0 6.0 6.0 6.0 6.0 6.0 5.2 4.4 3.2 II 9.5 9.5 9.5 116 138 85 75 50 32 32 30 22 20 20 19 18 17 16 19 19 16 15 15 14 13 13 13 13 13 13 12 16 22 11 10 10 10 10 10 9.0 S.O 8.0 8.0 S.O 8.0 8.0 7.0 7.0 8.0 9.0 9.0 10 11 10 10 9.0 11 12 10 17 21 21 39 9.0 9.0 9.0 8.0 8.0 7.0 7.0 6.0 6.0 5.0 5.0 5.0 5.0 6.0 6.0 6.0 6.0 7.0 7.0 7.0 6.0 6.0 6.0 6.0 5.0 4.2 4.0 3.9 3.; 3.0 2. J 2.8 2.i 2.3 2.3 2.2 2.2 2.2 2.0 1.7 l.( 1.5 1.3 1.2 1.1 1.1 1.1 1.0 1.0 1.0 1.0 1.0 1.0 .9 .7 .7 .7 .7 •7 .7 .7 .7 .5 SWEETWATER RIVER BASIN. 49 Daily discharge, in second-feet, of Sweetwater River near Descanso, Calif,, for 1907-1918 — Continued. Apr. July. .1 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 2.5 2.0 1.5 1.5 1.5 1.5 1.5 1.5 1.. 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2.0 1.5 1.5 1.0 1.0 1.0 1.0 1.0 1.0 3.0 2.0 4.0 3.0 1.3 1.0 1.0 1.0 1.0 1.0 1.0 1.; 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 3.0 5.0 4.0 3.5 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.7 3.0 4.0 3.7 2.0 1.8 1.6 1.4 1.4 1.2 1.2 4.0 4.0 2.6 2.0 2.4 2.2 2.0 2.2 107 50 69 182 182 182 182 8.0 6.0 6.0 16 26 29 146 76 14 18 16 14 11 8.0 7.0 6.0 7.0 10 15 15 11 10 8.9 19 17 14 22 17 10 6.1 5.7 5.7 5.7 5.0 5.0 5.0 5.0 5.0 5.0 4.2 3.5 3.5 4.6 5.4 5.0 5.0 4.6 4.2 3.8 3.4 3.1 2.S l.( 1.6 1.1 1.6 1.1 1.1 l.( 1.1 1.1 1.2 1.2 1.4 1.3 1.2 142131° .7 -21- 1.2 1.4 1.2 .9 .9 .9 1.4 1.2 1.1 1.1 1.1 1.1 1.4 1.2 1.2 1.5 2.5 1.6 1.4 1.5 12.6 2.7 380 209 20 12 20 12 7 .5.4 5.4 5.4 12 9.8 12 12 7.0 5.4 31 20 16 16 -wsp 447- 27 22 16 16 16 12 12 12 12 12 8.5 8.5 8.5 8.5 8.5 57 41 16 12 12 8.5 6.7 4.9 6.7 6.7 6.7 6.7 6.7 6.7 6.7 6.7 6.7 6.7 6.7 6.7 4.9 4.9 3.8 3.8 2.7 2.7 2.7 2.7 2.7 2.7 2.2 2.2 2.2 2.2 2.2 2.2 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.] 1.1 50 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Siveetwater River near Descanso, Calif, for 1907-1918— Continued. Day. Apr. May. 1 1.5 2 2 2.5 7 7 5.5 4.5 3.5 3 3 3 4.5 3.5 3 3 3 3 3 3 3 3 16 16 12 4.5 4.5 4.5 4.5 4.5 8.5 8.5 12 16 22 27 16 12 12 12 12 12 20 16 13 10 10 10 9.5 9 9 8.5 7.5 7.5 7 6.5 6.5 5 5 4.5 4 3.5 3.5 3 3 3 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1 1 1 1 1 1 1.5 1.5 1.5 1 .05 .05 .05 .05 .05 .05 350 45 23 13 5.5 4.5 4.5 3.5 3 3 3 3 3.5 3.5 380 148 115 14 36 27 5.5 5.5 5 4.5 4.5 4.5 4 4 3.5 3.5 3 12 9.5 14 9.5 9.5 9.5 9.5 2 2 2 2 1.5 1.5 1.5 1.5 1.5 1.5 .5 .5 .05. .05. .05. .05. .05. .05. .05. SWEETWATER RIVER BASIN. 51 Daily discharge, in second-feet, of Sweetwater River near Descanso, Calif, for 1907-1918- Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1914-15. 1 2 0.1 .2 .2 .3 .3 .4 .4 .5 .5 .5 .5 .5 .5 .5 .6 .6 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 1.3 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 .9 .9 .9 .9 .8 .8 .8 .9 .9 .9 .9 .9 .9 .9 1.0 1.1 1.1 1.1 1.1 1.1 1.2 1.2 0.8 .8 .8 .8 .8 .8 .8 .8 1.2 1.0 1.0 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 1.3 1.3 1.3 1.3 1.3 1.4 2.1 1.5 10 204 20 1.4 1.0 .9 .6 .6 .6 .7 .7 .7 .7 .7 .7 .7 .7 .7 .9 1.0 1.0 1.0 1.0 1.0 1.0 1.0 .9 .9 .9 1.0 r 1.0 1.0 1.0 1.6 1.2 1.2 1.2 1.3 2.0 1.7 1.4 1.5 1.4 1.3 1.2 1.2 1.2 1.2 1.2 1.1 1.0 1.0 1.0 1.0 1.0 1.1 7.5 11 4.7 3.3 2.7 2.7 2.7 2.3 2.3 2.5 12 16 12 9.9 5.5 4.7 3.9 3.9 3.5 3.3 2.9 2.5 2.3 2.3 2.3 5.5 10 13 1.0 .9 .9 1.2 1.1 1.1 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 LO 1.0 1.0 1.0 1.0 1.0 9.0 4.0 3.2 3.7 3.2 2.5 7.9 220 234 62 15 13 50 326 121 46 34 30 28 24 22 360 769 170 108 81 73 76 93 68 62 108 95 86 65 55 78 61 52 51 95 108 90 95 95 84 75 70 65 62 60 58 55 47 42 39 35 31 29 28 27 27 27 27 27 27 25 24 25 25 24 133 127 111 105 129 100 80 82 79 74 66 62 59 56 53 53 53 52 47 55 76 123 144 131 119 111 98 84 76 71 72 22 21 21 19 19 19 19 18 18 18 18 18 19 21 24 21 22 24 21 21 30 83 40 37 35 29 28 50 88 127 73 74 71 66 58 57 57 56 53 50 51 61 49 47 44 42 38 37 36 38 36 33 31 31 29 28 28 27 27 26 109 194 278 480 990 524 310 293 234 170 141 137 121 109 95 78 65 106 75 71 62 57 50 47 46 45 44 42 41 40 39 28 26 26 25 25 25 25 22 22 22 21 21 20 20 20 20 20 20 18 18 18 18 18 18 18 18 17 17 17 17 17 37 36 35 34 32 31 30 29 27 26 25 24 22 21 20 19 17 16 15 14 12 11 10 9 8 7 7 7 7 6.5 16 15 15 13 12 12 11 11 11 11 15 15 10 7 6 5 5 5 4 3.5 3.5 4.5 4.5 5 5 4.5 4.5 4.4 4.4 4.4 6.5 6.5 6.5 6 6 6 6 5.5 5.5 5.5 5.5 5 5 5 5 4.5 4.5 4.5 4.5 4 4 4 4 3.5 3.5 3.5 3.5 3 3 3 3 4.7 4.9 4.9 4.6 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 13 7.6 6.1 4.9 4.4 3.5 3.8 3.5 3.0 2.6 2.6 2.2 2.2 2.2 2.2 2.2 2.0 1.9 2.5 2.5 2.5 2.5 2 2 2 2 1.5 1.5 1.5 1.5 1.5 1.5 1 1 1 1 1 1 1 1 1 1 1 .9 .9 .9 .9 .9 .9 1.7 1.5 1.1 .8 .6 .6 .7 .7 .8 .8 .8 .8 .8 .6 ,6 .6 .6 .6 .6 .6 .5 .3 .2 .1 14 4.4 .9 .4 .2 .1 .1 0.9 .9 3 .9 4 .9 5 .9 6 .9 7 .9 8 .9 9 .9 10 .9 11 .8 12 -8 13 . .. .8 14 .8 15. .8 16 8 17 g 18 .8 19 .8 .7 20 21 • .7 .6 .6 .6 1.1 1 2 22 23 24 25 26.. . . 27 1 4 28 1 4 29 1 4 30 1 4 31 1915-16. 1 2 . 3 4 5 6 ""id 21 137 502 2,060 1,620 769 618 570 642 2,420 179 167 179 129 123 115 111 109 105 102 98 88 77 82 77 77 71 69 66 66 74 84 79 111 7 8 9 10 11 12 13 14.. . . 15.. 16 17 18 19 20 21 22., 23 24 25 26 . 27 28 29 30 31 52 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of 8weetwater River near Descanso, Calif ., for 1907-1918 — Continued. Day, Oct. Nov. D( .c. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1916-17. 1 2 3 2 2 1 10 I 8 6.5 4.9 4.2 3.1 2.9 2.7 3.1 2.7 2.5 2.5 2.3 1.9 2.1 2.7 3.1 2.7 2.5 2.3 2.1 1.9 .9 .9 .8 .8 .9 .9 .9 .9 .9 .9 .8 .8 .8 .9 .9 .9 .9 .8 .8 .8 .9 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 i;9 1 2.1 1 2.3 1 1.9 1 1.9 1 1.7 1 1.4 1 1.4 1 1.4 1 1.5 1 1.5 1 1.4 1 1.4 2 1.4 1 1.3 1 1.3 1 1.3 1 1.5 1 1.5 1 1.5 1 1.5 1 1.4 1 1.4 1 1.4 4 1.4 6 1.4 6 1.4 7 1.4 7 1.4 8 1.4 9 9 .8 .8 .8 .8 .8 .9 .8 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 . .9 .4 .4 .9 .4 .4 .3 .3 .5 .5 .4 .9 .9 .3 .5 7 9 9 9 7 9 7 5 9 2 .5 .5 .5 9 9 9 9 9 9 8 8 9 9 9 9 8 8 8 9 8 8 8 8 8 8 9 9 9 9 9 8 8 8 9 9 7 26 7.5 7.5 9 13 10 10 8.5 7.5 6.5 17 13 15 12 16 12 36 33 18 19 18 13 10 11 11 9.5 10 8 7.5 .4 .5 .6 .7 .8 .8 .8 .8 .9 .9 .9 .9 8 3.6 3.2 3.2 2.8 2.5 2.2 2.2 2.2 2.1 2.2 2.4 2.2 2.7 3.6 3.8 3.2 3.2 3.0 7.5 7.5 7.5 7.5 7.5 7.5 7 7.5 7 8 7.5 7.5 9 8 7 6.5 8 18 18 21 28 65 149 72 103 59 40 37 ....... 3.2 3.4 3.8 3.6 3.0 1.4 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 6.5 6.5 6 7 19 8.5 7 7 6 5 4.7 27 25 21 22 20 21 25 19 21 22 19 18 19 21 21 19 19 19 19 17 15 15 14 15 14 13 13 12 13 12 12 4.8 5 5 5 4.8 7 22 12 10 630 910 130 100 80 60 40 24 82 40 28 36 40 40 40 36 35 35 34 34 33 12 12 12 12 12 13 12 13 15 15 13 13 13 13 13 127 78 43 24 20 19 19 17 13 12 12 12 12 12 11 31 31 30 30 29 28 28 27 26 26 24 20 17 15 14 15 14 14 14 14 13 13 13 13 13 13 11 10 9.5 7 12 12 12 11 10 10 10 12 10 10 8.0 7.0 7.5 7.0 8.0 7.5 8.0 12.0 6.5 6.5 8.5 9.0 11 14 10 9 8.5 6 5 5.5 6 5.5 4.0 3.0 2.5 2.5 2.5 2.5 2.5 2.5 2.6 2.7 2.8 2.8 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3,7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 4.4 4.0 3.7 5.0 5 4.9 5.5 6 5 5.5 5.5 4.9 4.6 4.3 4.3 4.0 4.3 3.7 3.7 3.6 3.6 3.6 3.4 3.2 3.2 3.2 2.8 2.4 2.2 1.9 1.7 1.4 1.4 3.5 3.7 3.5 3.5 3.5 3.5 3.5 3.5 4.0 4.0 4.0 4.0 4.0 4.0 4.0 35 2.0 1.8 3,0 .7 .5 .8 1.2 1.8 2.4 2.9 3.2 3.2 3.7 4.0 1.4 1,4 1.4 1.5 1.5 1.4 1.4 1.4 1.3 1.2 1.2 1.2 1.3 1.2 1.2 1.2 1.1 1.1 1.1 1.1 1.1 1.0 1.1 1.1 1.0 1.0 1.0 1.0 1.0 1.0 1.0 4.0 4.4 4.4 4.0 3.5 3.0 3.0 3.2 2.4 2.2 1.6 1.0 .8 .5 '.3 .3 .3 .3 .3 .3 .3 .3 .3 1.0 1.0 1.0 1.0 .9 1.0 1.0 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .8 .8 .8 .8 .8 .8 0.9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .8 .8 .8 .8 .8 2 3 . 4 6 7.. 8 9 10 11 12 ]3.. 14 15 16 17.. 9 18 .8 19 .8 20. .8 21 .8 22 .8 23 .8 24 .8 25 . ... .8 26 .8 27 .8 28 . .8 29 .8 30.. .9 31 1917-18 1... 2 3... 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24. 25 26 27. .. 28 29 30 31 Note: Daily discharge determined as follows: 1909: Jan. 1 to Dec. 31, from rating curves well defined bel'ow 130 second-feet; Feb. 22-25, Mar. 1-2, discharge interpolated. 1910: Jan. 1 to Feb. 14, from poorly defined rating curves; Feb. 15 to Mar. 2, shifting-control method; Mar. 3-12, from poorly defined curves; Mar. 13 to Apr. 25, by shifting-control method; Apr. 26 to Oct. 15, from fairly well defined curves; Oct. 16 to Dec. 31, by shifting-control method. 1911-12: Jan. 1 to Mar. 7, 1911, by shifting-control method; May 1-8, 1911, interpolated; Mar. 8, 1911, to Mar. 8, 1912, from fairly well defined curves; Mar. 9, to Apr. 14, 1912, Apr. 15 to June 12, and June 13 to Sept. 30, from fairly well defined rating curves. 1912-13 and 1913-14: Discharge determined by shifting-control method and from rating curves covering short periods. July 1 to Aug. 16, 1913, water standing in pools; no discharge. Oct. 1 to Dec. 31, 1913, and July 1 to Sept. 30, 1914, stream practically dry. 1914-15: Rating curve used Oct. 11, 1914, to May 24, 1915, well defined below 100 second-feet. Records June to September, 1915, roughly approximate. 1916: No record Jan. 3-12 and Jan. 24toFeb. 5. Gage not read Feb. 17 and July 1; discharge interpolated Practically noflow Sept. 1-30; Oct. l-5,discharge estimated. Gage not read Nov.21-23 : discharge interpolated. 1917-18: Gage not read Oct. 28 to Nov. 3, 1917, Jan. 2-5, 1918, June 10-15, 1918, and July 28-31, 1918, discharge interpolated. No record during August and September, 1918. SWEETWATEK EIVEE BASIN. 53 Monthly discharge of Sweetwater River near Descanso, Calif., for 1906-1918. Discharge in second- Run-.off (total in acre- feet). Discharge in second- Jeet. Maxi- Mini- mum, mum. 1906. January February... March April May June July. August September. . The period . 1906-7. October November... December . . . January February — March April May June July August September... The year. 1908-9. October November.. December . . January February — March April May Jime July August September. . 44 86 1,250 84 36 15 2.6 4.6 5.8 The year 1907-8. October November December January February March April May June July August September The year . . . 1909-10. October No\?ember December January February March April May June July August September The year... 134 63 123 95 26 15 6.0 3.7 2.8 12 3.0 6.5 13 34 26 16 11 1.5 .4 2.0 1.0 1.5 506 177 166 91 11 9.5 4.4 8.0 6.0 506 91 479 22 39 25 7 2.3 .9 .4 2.0 4.2 2.6 1.2 1.1 1.0 22.3 180 48.5 21.6 7.0 1.8 1.8 1.5 1.0 1.1 4.4 9 18 24 23 15 6.5 3.4 2.3 2.6 3.0 10.1 56.7 28.6 65.0 39.8 19.6 9.8 5.0 2.9 2.6 1.0 3.0 1.9 1.9 2 6 5 3 1.5 .5 .4 .4 1.0 4.5 2.6 3.8 4.9 13.8 10.2 5.4 3.6 1.0 .4 .5 1.8 4.38 13 9.5 4.4 1.0 1.0 1.5 24.0 61.6 37.4 35.2 10.9 6.65 3.87 4.88 4.00 3.2 3.8 5.2 16 10 7 5 2.3 3.74 6.08 12.8 65.1 13.9 12.9 11.6 .63 .25 534 1,240 11,100 2,890 1,330 418 112 108 90 17,800 68 177 121 3,490 1,590 4,000 2,370 1,210 583 307 178 155 14,200 277 155 234 301 794 627 321 221 60 25 31 107 61 60 92 1,480 3,420 2,300 2,090 670 396 238 300 238 11,300 230 362 787 4,000 772 793 690 287 83 39 15 12 1910-11. October November... December... January February — March April May June July August September... The year. . . 1911-12. October November December January February March April May June July August September 5 168 182 146 26 4.2 1.1 2.5 1.2 .8 380 94 57 4.9 1.4 The year . . 1912-13. October November December January February March April May June July August September The year. . 1913-14. October November December January February March April May June July August September The year. . 1914-15. October November December January February March April May June July August September 380 2 1.5 1 .16 52 27 9.5 3 1 3 43 52 350 380 16 The year . 1.2 2.0 234 769 108 127 990 37 6.5 2.5 1.4 990 0.05 1 3 4.5 3 1 .4 .0 .0 0.955 1.51 2.66 8.05 46.2 24.4 8.95 1.81 .63 .57 .46 .47 L06 .62 .76 1.14 .90 .80 33.8 30.4 10.5 2.45 .58 .43 .62 6.94 .92 3.51 9.09 12.2 5.58 1.48 .70 .84 2.87 2 3 .5 .05 .11 17.8 33.9 7.0 5.82 3.19 .205 .05 .05 .05 5.52 1.18 18.4 114 49.9 31.7 164 19.8 L40 .91 54 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORl^IA. Monthly discharge of Sweetwater River near Descanso, Calif., for 1906-1918 — Continued. 1915-16. October November. . . December . . . January February March April May June July August September... 1916-17. October November. . . December... January February March April May Discharge in second- feet. Maxi- mum. l.c 204 16 179 144 74 10 2.3 9.5 36 149 27 Mini- mum. 0.8 .6 1.0 17 3.5 1.9 1 1.3 1.3 1.01 8.69 5.14 102 86.5 45.1 20.5 8.24 4.15 1.20 .00 3.91 1.52 3.09 13.2 26.4 18.1 20.8 9.02 Rmi-off (total in feet). 62 517 316 5,320 2,680 490 255 240 90.4 190 812 1,470 1,110 1,240 555 1916-17. June July.... August September... The year . . 1917-18. October November December January February March April May June. July August September The year . . Discharge in second- feet. Maxi- Mini- mum, mum. 1.5 1.0 19 910 5.5 35 1.4 1.0 1.0 4.8 2.5 .5 Run-off (total in acre- feet). 3.79 1.19 .900 .843 i.44 .84 .88 .85 2.17 4.02 82.8 18.8 3.42 4.08 1.42 ol.OO si. 00 73.2 55.3 50.2 6, 110 51.6 52.4 52.3 133 223 5,090 1,120 210 243 87.3 61.5 59.5 SWEETWATER RIVER NEAR DEHESA, CALIF. Location.— In NW. i NW. I sec. 20, T 16 S., R. 2 E., 1,000 feet below mouth of Lawson Creek and about 3 miles southeast of Dehesa, San Diego County. Drainage area — 112 square miles (measured on topographic maps). Elevation. — ^About 900 feet above sea level. Records available. — December 4, 1913, to July 31, 1916. Gage. — Bristol water-stage recorder on left bank 100 feet above control; vertical staff, in two sections, bolted to solid rock at same site. February 5, 1915, water-stage recorder was moved downstream to a point on left bank 5 feet above control. Original datum was maintained but gage readings differ on account of slope of water surface between the two sites. Water-stage recorder not in operation after April 10, 1915. Staff was destroyed by the flood on January 17, 191 6. March 19, 1916, a new staff was installed at same site but at an independent datum. Discharge measurements.^ — Made from cable 200 feet below concrete control or by wading. Cable was destroyed by the flood of January, 1916 and was not replaced. Channel and control.— Sand overlying solid rock; shifting. Both banks are high and not subject to overflow. A concrete control, extending to bedrock, has been constructed. December 8, 1915, it was raised 1.33 feet. (See PI. V, B, p. 16.) This control was destroyed by the flood of January, 1916. Extremes of discharge. — 1913-1916: Maximum stage recorded, 15.5 feet January 27, 1916 (discharge, 24,295 second-feet). Practically no flow August 12 to Octo- ber 31, 1915. Diversions. — About 0.3 second-foot is diverted for irrigation at Ellis ranch near Descanso. Regulation. — None. SWEETWATER EIVER BASIN. 55 Accuracy. — Stage-discharge relation not permanent, ilating curves for 1914 and 1915 well defined except for extremely high andlow stages; curves for 1916 fairly well defined. Gage read to hundreths twice daily after April 10, 1915. Daily discharge ascertained by applying to rating table mean daily gage height deter- mined by inspecting recorder graph, or from staff gage readings; discharge for periods not covered by rating tables interpolated between measurements when change in stage was slight, or computed by shifting-control method. Records fair. Discharge measurements of Sweetwater River near Dehesa, Calif., for 1914-1916. Date. Made by— Gage height. Dis- charge. Date. Made by- Gage height. Dis- charge. 1914. Jan. 30 Chas. Fulton Feet. 0.90 2.30 1.80 .80 .75 .68 2.00 1.70 3.00 2.75 2.1 1.93 1.65 2.00 1.60 1.01 1.01 .97 1.25 1.00 Sec.-Jt. 20 179 87 10 9.1 5.5 132 69 397 316 171 130 86 138 75 35 34 32 38 15 1915. July 9 Dec. 8 18 18 20 23 23 28 26 29 1916. Mar. 20 30 Apr. 7 15 22 29 May 5 June 22 July 21 Covert and Fulton F. C. Ebert Feet. 0.G3 .23 .23 .23 .17 .20 .20 .18 .18 .22 1.88 2.03 1.78 1.63 1.43 1.28 1.08 .50 .36 aec.,>. Feb 22 J F Covert 3.9 22 Chas. Fulton J. B. Rainey 7.2 Mar. 7 F C. Ebert C. F. Fulton 6.8 11 Chas. Fulton H. D. McGlashan C. F. Fulton 4.7 25 J. F. Covert 4.7 J. F. Covert. J. B. Rainey 4.8 1915. Jan. 31 do do do J. B. Rainey. 4.2 4.0 Feb. 5 12 do 7.1 12 14 do do do C. L. Fulton 99 17 28 do do do do do do do Sweetwater Water Co... 96 83 Mar. 7 Owen 85 15 C. L. Fulton 67 Apr. 1 F.C. Ebert 59 R.W.Day 46 5 J. F. Covert 14 14 C. L. Fulton -. .. 7 1 June 22 do Daily discharge, in second feet, of Sweetwater River near Dehesa, Calif, for 1913-1915 Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1913-14. 1 0.8 1.1 1.3 1.3 1.1 1.1 l.-S 1.3 1.4 1.4 1.3 1.2 1.4 1.1 1.3 2.4 6.8 6.8 10 6.8 5.0 4.2 4.5 5.0 5.5 22 281 110 24 16 15 18 16 14 12 10 10 9.4 8.4 7.4 7.4 6.8 6.5 7.8 8.7 7.4 6.3 6.5 9.4 64 87 237 207 91 57 41 28 26 26 23 20 18 17 15 12 10 10 10 10 8.7 8.1 8.1 8.1 7.8 7.4 6.8 6.8 6.8 6.8 7.4 8.1 6.8 6.3 6.3 9.7 7.8 10 8.7 14 10 6.8 6.0 6.0 6.8 6.8 7.4 6.8 7.1 9.4 11 11 8.4 6.8 6.8 6.8 6.8 8.1 11 11 8.4 7.8 8.1 10 8.7 8.1 7.8 6.8 10 10 11 14 12 11 9.4 8.1 6.8 6.8 6.5 6.8 6.8 6.5 6.5 6.3 5.2 5.8 6.8 7.4 7.4 6.3 4.7 4.2 4.2 4.2 3.9 3.9 3.7 3.4 3.4 3.2 3.0 2.5 2.5 2.5 2.3 1.7 1.2 1.5 1.8 2.5 2.1 1.7 1.3 1.0 .8 .7 .5 .4 .3 .3 .3 .3 .3 .3 .3 .3 .3 .2 .2 .2 .2 .2 0.2 .2 .2 .2 .1 !05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 0.05 .05 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .05 .05 .05 .05 .05 .05 .05 .05 .05 .1 .1 .1 .1 .05 .05 2 3 4.- 0.3 .4 .6 .6 .6 .4 .4 .3 .4 .4 .4 .4 .4 .4 .3 .3 .3 .4 .5 .6 .4 .4 .4 .4 .4 .4 .4 .5 5 6 . 7 8 . 9 10 11 12. 13 14 15 16 17 18 19. 20 21 22 23 24 25 26 27 28 29 30 31 56 SURFACE WATER OF PACIFIC SLOPE, SOUTHER:tT CALIFORNIA. Daily discharge, in second-feet, of Sweetwater River near Dehesa, Calif., for 1913-1915- Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1914-15. 1 0.1 .1 .1 .1 .1 2 .2 .2 .2 •2 .3 .3 .4 .4 .4 .3 .3 .3 .3 .4 .4 .4 .4 .3 .3 .3 .3 .3 .3 .3 0.6 .4 .4 .4 .4 .4 .4 .4 .4 .4 .6 .9 .6 .4 .4 .4 .6 1.1 1.5 1.4 1.1 .9 .9 .9 1.1 1.3 1.4 1.3 1.2 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.3 1.3 1.4 1.8 1.5 1.4 1.4 1.3 1.3 1.5 1.5 1.4 1.3 1.3 1.4 1.7 6.5 7.1 4.7 4.7 5.2 5 10 284 302 80 7.5 7.5 7.5 7.5 7.5 68 202 392 140 85 79 63 55 55 219 909 369 233 154 124 124 124 104 96 148 187 124 119 103 129 116 96 87 198 240 183 172 179 156 133 114 117 122 131 119 101 87 84 81 78 75 72 70 08 66 50 50 42 41 40 39 42 39 37 39 34 36 36 32 28 27 27 29 25 30 31 36 38 31 27 29 31 27 27 39 110 52 48 46 38 36 65 115 165 95 91 95 99 95 91 88 87 82 83 83 87 82 • 82 80 76 74 73 72 68 62 65 63 61 59 58 58 58 57 57 140 250 3G0 625 1,290 680 405 380 305 220 185 180 IGO 140 125 100 85 140 100 92 81 74 65 61 60 58 57 55 53 52 51 54 52 51 50 47 46 46 46 46 46 46 46 45 44 44 41 42 42 42 46 42 42 40 39 40 37 36 35 35 35 34 49 47 45 42 40 38 36 33 31 29 27 24 22 20 18 15 15 15 15 15 15 15 15 14 13 13 12 11 11 10 33 32 30 29 29 28 26 26 24 22 22 20 15 13 12 13 13 13 13 13 13 14 11 11 11 11 9.0 8.5 8.0 8.0 9 9 8 8 7 7 6 5 5 5 4 3 3 3 3 3 3 3 2.5 2.5 2 2 1.5 1.5 1 1 .9 .8 .7 .6 .5 9.0 7.5 7.5 7.0 7.0 6.0 4.9 4.9 3.6 3.6 4.9 3.8 6.0 17 18 9.5 7.5 7.5 7.0 6.0 5.5 4.4 3.8 3.8 3.8 3.2 3.0 3.0 3.0 3.0 3.0 0.5 .5 .4 .4 .4 .3 .3 .2 .2 .1 2 3 4 5 C. 7 8 9. 10 11 12 13 14... 15 16. 17 18 19 20 21 22 23 24 25 26 27 . . 28.... . 29 30 31 1915-16. 1 0.1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 ■' .1 2 3 4 5 6 7 8 ""i.'b 4 4 4 4 4 4 9 10 11... 12 13 14. 15 9 16 17 _ 1 18 1 1 .'5 7 4.5 4.5 19 -1 95 108 117 121 153 137 127 119 114 110 108 104 97 20 .1 21 22 23.. .4 5 24 25 -■ .4 26 4 27 28 29 .4 .4 7 8 7.5 30 31 Note.— 1914-15: Apr. 28 to May 5, 1914, water-stage recorder not operating satisfactorily, record some- whatuDcertain. Jan. 2&-31, 1915, no gage-height record, discharge estimated from record of flow at Des- canso; Apr. 15 to June 15, 1915, discharge estimated as 130 per cent of flow at Descanso; June 16 to Aug. 11, interpolated between measurements. Channel practically dry after Aug. 11. 1915-16: Discharge Oct. 1, 1915, to Jan. 5, 1916, determined from rating curves covering short periods and by shifting-control method. No record as follows: Nov. 1-14, 16-21, 24, 26-28; Dee. 1-7, 16-17, 22, 24-25, 27-28, 1915; Jan. 6 to Mar. 18, 1916. SWEETWATER RIVER BASIN. 57 Monthly discharge of Sweetwater River near Dehesa, Calif., for 1913-1916. Month. Discharge in second- feet. Rnn-cff (total in acre- feet). Month. Discharge in second- feet. Run-oflE (total in Maxi- raiun. Mini- mvim. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1913-14. December 0.6 281 237 23 11 14 2.5 .2 .1 0.3 .8 6.3 6.3 6 2.5 .2 .05 0.42 17.5 37 10.2 8.25 6.15 .94 .085 .069 .05 23 1,080 2,050 627 491 378 56 5 4 3 1914-15. January 302 909 240 165 1,290 49 9 .5 1.0 55 37 25 51 10 .5 23.8 168 97.6 44.6 214 23.5 3.60 .11 1,460 February March 9,330 February March 6,000 April 2 650 April May 13,200 Mav June 1 400 July 221 July August 7 The year 1915-16. September o 1,290 .0 47.4 34,300 The period.. 281 8.09 4,720 .1 99 54 33 18 .1 57 34 8.0 3.0 .10 76.0 43.1 17.7 6.05 g 1914-15. .05 i1 .05 .05 .27 .78 3 16 48 April 4,520 2,650 1,050 October o . . . May June July 372 a Estimated. SWEETWATER RIVER AT SWEETWATER RESERVOIR, CALIF. The following record of run-off has been furnished by the Sweet- water Water Co. (see PL VII, A, p. 44) through John F. Covert, chief engineer : Run-off of Sweetwater River at Sweetwater reservoir, Calif. [Drainage area, 181 square miles.a] Season (Oct. 1-Sept. 30). Rainfall at Sweet- water reservoir (inches). Total run-off (acre- feet). Season (Oct. 1-Sept. 30). Rainfall at Sweet- water reservoir (iQches). Total run-off (acre- feet). 1887-1888 7,048 25,253 20,532 21,565 6,198 16, 260 1,338 73,412 1,321 6,892 4 245 825 1902-1903. 9.55 5.11 16.05 16.24 12.83 11.74 10.87 10.28 11.81 11.11 7.20 11.63 15. 74 15.68 1888- '»889 13.64 17.96 11.76 9.90 11.62 6.20 16.21 7.45 11.87 7.05 5.74 6.50 9.27 7.96 1903-1904 1889-1890 1904-1905 13 760 1890-1891 1905-1906 35!000 1891-1892 1906-1907 30' 000 1892-1893 1907-1908 4' 140 1893-1894 1908-1909 16 007 1894-1895 1909-1910 9' 619 1895-1896 1910-1911 S 160 189&-1897 1911-1912 5,000 1897-1898 1912-1913 915 1898-1899 1913-1914 3,525 27,085 1899-1900 1914-1915 1900-1901 1915-1916 160,580 1901-1902 a Measured on topographic maps by U. S. Geological Survey. 58 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. MISCELLANEOUS MEASTJBEMENTS. Measurements of stream flow in the Sweetwater Kiver basin at points other than those at which gaging stations are maintained are recorded in the following table : Miscellaneous discharge measurements in Sweetwater River drainage basin. Date. Stream. Locality. Gage height. Dis- charge. Jan. 27,1916 Sweetwater River do . do. .. NW. i NW. i sec. 20, T. 16 S., R. 2 E Feet. Sec.-ft. a2 4 295 Do... . Sec. 14, T. 16&., R.l, 1 a27, 530 43,002 12 Do .TaTTianhn flany^Tl Mar. 7, 1914 Jan. 27,1916 do IJ miles above Sweetwater dam.. . . .. .do 645 500 Mar. 10,1918 May 8, 1911 June 28, 1912 Oct 3 1912 ....do Dehesa 14 Ellis flnme . 3 .do do... 1 do do... . 2 Oct. 3^ 1913 ....do do 25 Jan 1 1918 .do do 11 8, 1918 do do. .15 a Computed from cross sections and slope data. 6 Computed from data collecteda t reservoir. SAN DIEGO RIVER BASIN. GENERAL FEATURES. San Diego Eiver rises in the Cuyamaca Mountains, on the western slope of the Coast Range, and flows in a southwesterly direction, discharging into Pacific Ocean through Mission Bay, at the northern boundary of San Diego City. Its length is about 50 miles, half of which lies in the mountains above the town of Lakeside. The San Diego basin comprises 434 square miles and lies directly south of the San Dieguito basin and north of Sweetwater River basin. The San Diego has several small tributaries, the most important being Coleman, Cedar, Boulder, South Fork, and Chocolate creeks all of which enter from the east and south above Lakeside, San Vicente Creek, the only important tributary from the north, enters the river at Lakeside. The upper part of the basin above Lakeside, is extremely rough and rugged, but below Lakeside numerous valleys and high mesa lands extend to the coast. Elevations throughout the basin range from 50 to 600 feet in the foothills and from 600 to 6,000 feet in the mountains. Cuyamaca Peak, the highest point in the basin, is 6,028 feet above sea level. The geologic formation of the basin is fully described in the re- port on the geology and ground waters of the western part of San Diego County, which is published as Water-Supply Paper 446. The San Diego basin is very poorly forested. The timber is con- fined almost entirely to the valley along the streams and to the higher mountain areas. The mountain slopes are fairly well covered SAN DIEGO EIVER BASIK. 59 with brush, but the lower foothills are almost entirely bare, support- ing only a scattered growth of low brush. The mean annual rainfall ranges from 10 to 15 inches along the foothill belt, and from 20 to 45 inches in the mountains. Irrigation is carried on extensively in the valleys and on the mesa lands between Lakeside and San Diego, and additional areas might be irrigated if an adequate supply of water could be assured. Two storage reservoirs have been constructed: The Cuyamaca reservoir is on Boulder Creek, 4,600 feet above sea level, and has a capacity of 11,400 acre-feet with a 35-foot earthern dam. La Mesa reservoir is in the foothills about 2 miles northwest of the town of La Mesa at an elevation of 435 feet. The original dam was constructed of earth and rock, was 66 feet high, and had a storage capacity of about 1,500 acre-feet. It has recently been replaced by the Murray dam, a con- crete multiple-arch dam, 100 feet high, a short distance farther down- stream (PL VIII, p. 45). La Mesa reservoir is filled by water di- verted from San Diego Eiver through Cuyamaca Water Co.'s flume. G AGING-STATION BECORDS. SAN DIEGO RIVER AT DIVERTING DAM NEAR LAKESIDE, CALIF. Location. —In NE. ^ NE. ^ sec. 11, T. 14 S., R. 2 E., at intake of Cuyamaca Water Co.'s flume, about 1,000 feet below mouth of Boulder Creek, and 13 miles north- east of Lakeside, San Diego County. (See PL IX, A.) Drainage area. — 102 square miles (measured on topographic maps). Elevation. — ^About 800 feet above sea level. Records available. — October 1, 1912, to September 30, 1916. Gage. — Painted on upstream face of dam near left bank, February 22, 1916. Original datum not maintained. Gage previously used was a vertical staff fastened to upstream face of dam near left bank. A Friez water-stage recorder, at same site and datum, was in use January 16, 1912, to November 14, 1914. Discharge ivieasurements. — Made from cable one-fourth mile below dam or by Channel and control. — Sand; shifting above and below dam. The concrete diver- sion dam acts as a control. Extremes of discharge. — 1912-1916: Maximum stage recorded, January 28, 1916 gage height not reported (discharge, 15,800 second-feet): no flow over dam for several months during each year. Diversions. — The intake of Cuyamaca Water Co.'s flume is at left end of diverting dam. No diversions above. Regulation. — See Boulder Creek near Julian for amount of water released from storage in Cuyamaca reservoir. Capacity of Cuyamaca reservoir, 11,400 acre-feet. Accuracy. — Stage-discharge relation permanent for flow over dam. Rating curve fairly well defined except for flood stages. Gage read to hundredths three times daily. Daily discharge ascertained by applying mean daily gage height to rating table or by applying to rating table mean daily gage height determined by inspect- ing recorder graph. Total discharge of river obtained by combining flow over dam and through waste gates with discharge of Cuyamaca Water Co.'s flume. Dis- charge through waste gates was computed by Cuayamaca Water Co. from record of gate openings. Records good. Cooperation. — Record for 1915-16 furnished by Cuyamaca Water Co. 60 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Discharge measurements of San Diego River at diverting dam near Lakeside, Calif. , for 1913-1916. Date. Made by — height. Dis- charge. Date. Made by- height. Dis- charge. 1913. Jan. 16. . W. S, Post. Feet. 9.82 9.62 10.08 Sec.-ft. 60 11 168 1915. Feb. 3... 6... 1916. Apr. 14 F. C. Ebert Feet. 10.20 9.80 '"im 1914. Jan. 20... F, C. Ebert . . do do... 57 28 do 57 May 24.. D.A.McClung 12 Note.— These measurements show only discharge over dam. Daily discharge, in second feet, of San Diego River at diverting dam near Lakeside, for 1913-1916. Day. Jan. Feb. Mar. Apr. Day. Jan. Feb. Mar. Apr. 1913. 1 . . ...... 2 1 1 1 1 2 2 2 2 2 2 2 2 2 : 1913. 6 27 28 10 5 2 .5 3 2 2 1 7. . . 3 8. 4. . . 9 5 2 70 10 2 55 40 55 28 1 6... ... 1 7 .. 2 .5 2... . 6 10 .5 5 5 8 •3 2.4 9 4 10 .. 5.. . 11... 6 12. 7... 13 4 1 8 .1 14 9 15. . 1 Day. Dec. Jan. Feb. Mar. Apr. May. June. July. 1913-14. 1 12 3 28 23 19 15 17 4 (a) (a) 19 23 10 2 (a) 2 3 4 5 6 «2 7 8 4 4 .5 0.5 9 10 11 3 12 .5 13 ... . 14 1 4 8 10 12 17 15 9 8 8 12 15 190 925 135 55 31 14 2 2 2 2 2 15 16 17 1 18 ■"""295' 135 1 ,260 425 255 117 72 50 36 31 1' 19 20 21 22 23 .5 28 1 24 25 26 (a) (a) 27 28 10 1 19 1 29 4 33 30 31 aDischarge for day less than one-half second-foot. U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 447 PLATE IX GAGING STATIONS. A, San Diego River at diverting dam, near Lakeside, Calif. ; B, Cuyamaca Water Co.'s flume at diverting dam, near Lakeside, Calif.; C, Cuyamaca Water Co.'s flume at Los Coches Creek, near Lakeside, Calif. U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 447 PLATE X GAGING STATIONS. A. Santa Maria Creek near Ramona, Calif.; B. Santa Ana River near Mentone, Calif., showing vertical staff gage; C, Tunnel diversion near Azusa, Calif., showing weir. SAN DIEGO RIVER BASIN. 61 Daily discharge, insecovd-feet, of San Diego River at diverting dam near Lakeside, Calif., for 1913-1916— Continued. Day. Dec. Jan. Feb. Mar. Apr. May. June. July. 1914-15. 1 58 295 362 157 83 55 33 24 15 530 8.50 509 222 102 112 168 179 130 94 179 157 104 90 112 162 99 86 72 890 850 760 010 330 300 240 260 220 210 190 170 160 150 145 145 145 140 140 130 150 125 110 111 106 153 133 185 176 319 203 146 130 126 94 90 126 69 83 83 69 55 50 42 39 19 14 12 8.5 10 10 9 7 4.5 3.5 4.5 10 23 8.5 7 305 267 206 188 244 202 175 165 159 123 119 114 109 103 94 89 88 80 78 105 183 129 236 207 191 163 159 123 119 112 103 2 ....... 14 6 3 .5 174 90 168 104 66 "i52""' 94 92 92 95 90 225 319 60 56 56 57 GO 10 62 62 62 51 23 30 23 19 19 19 18 17 16 15 12 12 12 126 222 287 416 1,520 380 216 152 117 80 52 31 130 117 90 90 83 389 99 86 69 72 69 55 55 50 47 42 42 39 33 12 10 9 9 9 9 9 9 9 9 9 11 10 14 8.5 8.5 8 8 8.5 18 12 9 8.5 8.5 8.5 8.5 8 7.5 7.5 6 6 31 31 28 28 28- 26 24 17 12 10 10 10 10 8.5 7 5 3 2 1.5 2 3 I :;;::: 6 7 - -- 8 9 . .. 2 10 .5 11 12 13 14 . 15 16 . .. 17 18 ..... 19 20 . . 21 22 2 1 23 3.5 24 . .... 25 26 27 28 . - 29 425 488 130 30 . 31 1915-16. 1 .6 2 ... 2.5 3 2.5 4 2.5 5 2.5 6 2.5 7 1.0 8 11 12 36 54 147 1,581 4,410 2,655 1,815 727 409 276 205 264 509 929 10,200 10,900 5,910 3,070 2,227 14 .5 15 ... .... 16 17 18 1 19 21 22 24 25 26 27 28 1 25 25 29 31 Note.— No flow over dam on days for which discharge is not given. No gage height record Jan, 28 to Feb. 21, 1916. Discharge Jan. 1-12, 1916, estimated at 31 second-feet. 62 SUKFACE WATER OE PACIFIC SLOPE, SOUTHERN CALIFORITIA. Monthly discharge of San Diego River at diverting dam near Lakeside, Calif., for 1912-1916. Month. Discharge in second- feet. Run-off (total in acre- feet). Month. Discharge in second- leet. Run-off (totalin Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1912-13. 28 70 10 2.4 .0 .0 .0 .0 2.34 9.45 1.21 .18 144 582 74 11 1914-15. 488 850 319 174 1,520 31 2 15 3.5 31 33.8 182 60.5 26.6 170 9.78 .13 2,080 10,100 3,720 1,580 10,500 582 February March February March . April . . April May The year 70 .0 1.04 791 Jime... July 8 1913-14. December 1 925 1,260 28 28 23 .5 .0 .0 .0 .0 .0 .0 .0 .05 47.4 96.2 4.47 2.3 2.35 .01 3 2,910 5,340 275 137 144 .6 The year 1915-16. January 1,520 39.4 28, 600 February 10,900 890 305 319 18 2.5 2.5 ""ioe'"' 78 10 6 .0 .0 1,510 256 153 59.3 9.27 .23 47 92,800 14, 700 April . . February March . Mav 9 410 April 3,530 570 14 The year 1,260 .0 12.2 8,810 June... July 29 The year 10,900 .0 167 121,000 Note.— Flow over dam only. No discharge for months for which record is not given. Combined daily discharge, in second-feet, of San Diego River and flume at diverting dam near Lakeside, Calif, for 1912-1916. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. 3.0 3.3 2.3 2.5 4.3 39 28 6.1 6.0 7.8 4.4 3.0 3.8 2.4 1.4 4.0 43 34 5.3 5.3 7.4 4.1 2.6 4.0 4.0 2.6 4.0 40 37 3.2 4.7 7.4 3.8 10 3.5 4.0 2.8 4.0 36 27 3.2 4.8 6.5 3.6 10 4.5 3.5 2.9 4.0 41 24 3.2 4.4 5.8 3.5 11 4.1 3.1 1.5 4.0 37 17 3.2 4.4 5.8 3.3 6.9 3.8 3.5 1.1 6.0 35 17 4.0 4.2 6.1 3.3 4.8 3.8 3.3 1.4 10 29 18 4.0 4.2 7.4 3.3 3.7 4.0 3.2 .5 8.7 23 24 5.2 4.4 7.8 3.3 2.0 3.8 3.1 2.7 7.1 24 18 5.4 4.2 8.0 3.5 2.0 3.8 3.2 5.6 5.5 22 12 5.2 4.2 8.0 3.5 3.2 3.5 3.3 8.0 5.5 40 11 5.2 5.8 7.6 3.3 3.1 3.5 3.3 7.2 5.5 50 11 4.9 5.9 8.2 3.3 4.2 3.5 3.3 5.5 5.1 49 11 4.9 5.9 8.2 3.3 3.1 3.6 3.5 4.4 4.8 8.2 12 4.0 6.1 8.0 3.3 4.1 3.7 3.6 33 4.5 12 12 2.8 6.1 8.0 3.3 3.6 3.8 3.6 37 4.2 21 13 2.6 6.7 7.6 3.2 3.5 3.0 3.5 19 4.2 24 13 2.7 4.8 7.8 3.5 3.1 3.0 3.5 14 4.2 27 13 2.7 4.5 7.2 3.7 3.0 3.5 3.3 10 4.2 30 14 2.7 5.1 5.8 4.0 3.0 3.7 3.3 8.6 6.2 32 14 2.7 6.7 5.5 4.0 2.7 4.0 3.1 9.0 83 19 13 2.9 6.7 5.3 3.8 3.2 4.0 3.1 8.8 42 54 4.0 3.0 7.2 4.8 3.6 3.5 3.3 .9 7.9 39 52 8.2 3.0 8.0 4.5 3.5 3.5 3.6 2.0 6.7 92 55 7.6 3.7 8.0 3.8 3.5 3.2 3.5 3.2 5.0 77 55 6.1 4.4 8.0 3.5 3.6 3.6 3.5 3.0 4.2 92 37 6.1 4.2 8.2 3.5 3.6 3.5 2.9 2.7 3.8 65 29 6.0 4.1 8.9 4.0 3.6 3.2 2.7 3.0 3.8 28 5.5 4.0 8.0 4.5 3.7 3.5 2.7 3.3 4.0 24 6.8 4.8 7.1 4.5 4.2 3.3 2.7 3.8 22 4.9 4.5 4.1 Sept. 1912-13, 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 3.6 2.9 2.8 2.7 1.7 2.8 3.7 4.0 3.6 2.1 2.2 3.7 3.7 3.8 3.3 2.9 3.0 3.0 3.3 3.2 3.2 3.0 3.3 3.0 3.5 2.8 3.2 3.0 3.2 2.9 SAN- DIEGO RIVER BASIN. 63 Combined daily discharge, in secorvd-feet, of San Diego River and flume at diverting dam near Lakeside, Calif ., for 1912-1916 — Continued. I, Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 3.5 2.5 2.1 2.3 2.2 2.4 2.5 2.3 1.4 2.8 2.7 2.4 2.0 2.2 2.3 2.4 2.4 2.4 2.2 6.0 3.5 1.9 2.0 1.7 1.5 1.1 2.3 2.5 2.0 1.9 2.3 3.8 4.9 3.3 3.3 3.3 3.3 3.9 3.2 3.3 1.9 2.5 2.3 0.0 .0 4.0 .0 .0 .0 .0 .0 .0 3.0 .6 .0 .0 4.4 .6 6.9 24 3.8 .0 4.1 20 3.0 13 6.5 5.5 4.3 4.3 3.8 4.3 3.6 5.5 8.3 4.3 5.9 12 17 16 9.0 9.2 8.0 12 15 190 925 143 73 50 3.0 2.9 2.6 2.5 2.4 2.4 2.4 2.4 1.8 2.4 2.4 2.4 2.4 2.4 2.5 19 18 12.5 12.5 15 9.4 434 498 144 18 8.7 13 12 11 9.4 7.8 11 302 145 1,260 444 279 145 94 83 312 364 159 851 509 229 174 114 176 187 138 113 195 174 126 117 143 192 131 118 104 349 231 6.0 6.4 7.2 12 54 16.5 184 100 178 114 102 124 102 121 23 14 15 13 15 224 321 399 528 1,620 277 242 205 137 161 148 121 121 114 420 130 117 100 103 5.5 5.5 5.5 3.9 12 9.6 6.2 3.8 4.7 3.3 .1 7.8 7.6 7.8 8.3 7.4 7.( 7.0 0.0 .0 .0 5.0 3.0 2.0 3.5 4.6 4.3 4.4 4.6 4.6 3.0 3.3 3.8 3.0 3.0 2.9 2.6 2.8 2.6 2.8 2.8 2.8 2.9 3.3 16.5 15 14.5 14.5 14 10.5 12.5 11 7.3 9.3 8.2 8.2 8.0 7.8 8.2 8.7 12 8.7 8.7 7.6 64 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Combined daily discharge, in second-feet, of San Diego River and flume at near Lakeside, Calif., for 1912-1916 — Continued. Day. 1915-16. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 - 30 31 6.1 5.9 6.1 6.3 5.9 5.9 6.5 6.1 5.9 4.8 4.4 5.4 4.4 5.4 5.4 4.2 4.2 4.2 5.0 5.0 5.5 5.7 7.4 4.8 2.5 2.0 2.3 2.4 2.5 2.5 2.5 2.4 2.2 2.2 2.2 2.4 2.5 3.6 3.6 3.6 3.6 3.6 3.4 3.4 3.6 3,4 4.1 5.9 4.2 4.8 4.8 4.8 4.8 4.8 10.5 1.4 1.8 .1 .0 .0 .0 .0 .0 3.1 4.4 .3 .6 7.2 15.5 147 1,581 4,410 2,655 1,815 727 276 205 264 509 929 10,200 10, 900 5,910 3,070 2,227 850 760 610 330 300 240 260 220 210 190 170 160 150 145 145 145 140 140 130 150 125 110 111 106 153 133 185 176 305 267 206 202 175 165 159 123 119 114 109 103 94 105 183 129 236 207 191 163 159 123 119 112 103 Apr. 92 95 90 225 319 May. 15.5 14.5 13 12.5 11 10 5.2 13.5 14 14 14 7.6 6.7 11.5 9.6 12 12.5 12.5 12 10 10 7.6 8.0 9.5 9.5 July. 8.4 7.7 6.5 6.2 6.2 6.3 6.9 6.6 5.9 6.1 5.4 5.7 5.2 12 8.5 8.0 6.1 5.6 5.7 5.7 5.2 5.0 4.9 4.6 4.4 4.0 3.7 3.7 3.7 3.7 4.2 Aug. Sept. 5.2 3.7 3.7 3.7 3.7 3.7 4.0 4.3 4.4 3.7 3.8 3.7 3.7 3.0 3.8 4.3 5.7 5.2 4.6 4.0 5.4 3.1 3.0 5.6 4.0 3.3 3.1 3.1 3.0 3.0 3.0 2.4 3.1 3.0 4.0 4.0 3.8 4.6 5.4 5.7 5.7 5.7 5.2 4.9 6.1 7.2 9.1 7.6 7.0 7.4 7.0 8.3 7.4 Note.— Records for 1913-16 include discharge through waste gates in dam. Mean discharge Jan. 1-12, 1916, 31 second feet. Combined monthly discharge of San Diego River and flume at diverting dam near Lake- side, Calif, for 1912-1916. Discharge ta second- feet. Maxi- mum. Mini- mum. Run- off (total in acre- feet). Discharge in second- feet. mum. mum (total acre- feet). 1912-13. October November December January February March April May Jime July August September The year. 1913-14. October November December January February March April May June July August September — The year . 4.5 4.0 37 92 55 37 2.0 2.7 .9 .5 4.0 8.2 4.0 2.6 4.2 3.5 3.2 1.7 4.07 3.58 3.12 7.38 21.4 33.5 14.7 3.94 5.95 6.28 3.60 3.10 250 213 192 454 1,190 2,060 875 242 354 386 221 18'i 9.15 24 925 1,260 56 49 37 12 5.0 4.3 3.8 .0 .0 .0 .0 7.8 14 6.0 5.7 .0 .0 2.4 1.2 1.81 .00 3.50 51.1 112 25.5 17.3 14.2 3.26 2.50 3.36 2.25 111 215 3,140 6,220 1,570 1,030 873 194 154 207 134 19.1 1914-15. October 3-31.... November 1-16 . December 23-31. January February March April May June July August September 1915-16. October November December January February March April May June July August September The year . . . 851 349 238 1,620 60 16.5 0.9 1.3 3.0 1.8 40 40 16.5 62 14 6.9 4.8 4.8 1.83 2.89 3.79 39.3 199 98.2 65.2 232 34.2 10.1 7.21 7.35 105 92 68 2,420 11,100 6,040 3,880 14,300 2,040 621 443 437 7.2 7.4 15.5 10,900 890 305 319 44 15. 12 5.7 9.6 4.2 2.0 106 78 38 22 6.7 3.7 3.0 2.4 5.50 3.47 3.39 1,510 256 153 75.1 31.1 11.4 5.8i 3.9c 5.8^ 338 206 208 92,800 14, 700 9,410 4,470 1,910 678 360 242 347 126,000 Note. — Records for 191.3-1916 include discharge through waste gates of dam. SAISr DIEGO RIVEK BASIIT. 65 SAIT DIEGO mVER AT LAKESIDE, CALIF. Location. — In El Cajon grant, just above ford on Lakeside-Padre Barona Valley road, three- fourths of a mile above Cuyamaca k Eastern Railroad bridge, three- fourths of a mile north of Lakeside, San Diego County, and about a mile above mouth of San Vicente Creek. Drainage area.— 203 square miles (measured on topographic maps). Elevation.— About 400 feet above sea level. Records available. — December 3, 1905, to September 30, 1916. Gage. — Staff gage in three sections on left bank 100 feet above ford. The site and datum unchanged since station was established. Discharge measurements. — Made from cable at gage or by wading. Equipment was destroyed by flood of January, 1916. Channel and control. — Sand; shifting. Both banks are fairly high; overflow unusual. Right bank was overflowed for a considerable distance during the flood of January, 1916. Extremes of discharge. ^ — 1905-1016: Maximum stage recorded, 12.6 feet Janu- ary 27, 1916 (discharge not determined; see San Diego River near Santee and at San Diego) ; no flow for long periods each year. Diversions. — Cuyamaca Water Co.'s flume heads at diverting dam about 1,000 feet below Boulder Creek and about 15 miles above station. Several pumping plants, 1 to 3 miles above station, obtain water for irrigation from wells along the banks of stream. Regulation.— Cuyamaca reservoir, on headwaters of Boulder Creek, has a capacity of 11,400 acre-feet. See also Boulder Creek near Julian. Accuracy. — Stage-discharge relation not permanent. Gage read to hundredths at low and medium stages, liaK-tenths at other times; usually twice daily with more frequent readings during higli v/ater. Daily discharge ascertained by applying mean dailj^ gage height to rating table or, for periods not covered by fairly well defined rating curves, by shifting-control method and by interpolating between discharge measurements when change in stage was slight. Records fair. Discharge measureriients of San Diego River at Lakeside, Calif., for 1906-1916. Made by— Gage height, Dis- charge. Date. Frrf.. Scc.-jt. 1907. 2.G7 0.4 Jan. 10 S.04 12.5 18 2.90 1.3 19 8.20 42 20 3.28 Feb. 4 3.54 100 11 3.50 92 23 3.40 07 Mar. 4 3.10 17 5 4.50 714 5 4.80 995 5 4.10 280 11 3.90 201 18 4.50 403 23 4.25 183 Apr. 1 4.15 98 ' 13 4.07 130 24 4.25 186 May 3 3.92 96 17 8.86 62 25 3.94 89 31 3.45 2.8 June 8 3.39 .3 13 3.30 1.0 July 22 Dec. 14 3.65 39 19 3.80 82 30 Made by— Gar^e Dis- height. charge. Ffft. Scc.-ft. 4.10 234 4. GO 667 4.20 419 4.00 303 3. 75 105 3.60 74 3.90 152 3.62 81 4.15 335 4.35 623 4.50 576 3.85 187 3.75 116 3.95 268 3.90 189 3.80 145 3.G5 91 3.60 02 3.54 33 3.48 26 3.49 20 3.50 23 3.52 30 3.30 .62 3.16 .57 3.18 .06 3.20 1.10 1906. Jan. 9 24 Feb. 6 12 20 22 22 22 Mar. 9 13 13 14 15 Apr. 7 21 24 30 May 1 9 12 June 20 Aug. 8 Dec. 19 1907. Jan. 3 W. V. Hardy. . do......... do do do do do do ....do ....do ....do , ....do , do , ....do ....do... = ....do , ....do ....do , ....do ....do , do.. C.H.Lee R.S.Hawley... W.V.Hardy.. VV. V Hardy... do , W. V. Hard} do do , ....do....... ..-.do ....do ....do ....do ....do ....do ....do -...do ....do .-..do ..-.do -...do ....do ....do....... ....do ....do .-.-do. ....do -...do W. A. Lamb. W.V.Hardy. do , ....do ., 142131°— 21— wsp 447- 66 SUEFACE WATER OE PACIEIC SLOI*E; SOUTHERIT CALIFOEISriA. Discharge measurements of San Diego River at Lakeside, Calif., for 1906-19-10 — Contd. Made by— W. V. Hardy . . . do .-..do -...do... ...-do .-..do .-.-do .---do --..do ..-.do ....do ....do .-..do ....do-...._- ... ....do ...-do.... .-..do... ....do do do. do do do... do do do do \Y. V. Hardy Beadic and ilardy do ....do W. v. Hardy do -...do do -...do .-..do .-..do do.. Hardy and Tlium W.V.Hardy do do Beadle and Tuum W.V.Hardy - - . .do. ¥. Thum andH. Thum. W. V. Hardy do ¥. Thum and H. Thum Beadie and Thum W.V.Hardy R. E. Haines W. V. Hardy. do do do do do do .-..do ....do ....do do -.-.do _ do -do ..do-. ..do.. ..do.. ..do.. ..do.- ..do.. ..do.. . V.Hardy... ..do Gage height. Fed. 3.20 3.22 3.23 3.36 3.40 3.50 3.60 3.80 3.60 3.50 3.45 3.50 3.60 3.80 3.48 3.45 3.38 3.41 3.40 3.34 3.35 3.45 3.31 3.45 3.38 3.27 3.26 3.11 6.00 7.00 4.60 4. 55 4.20 3.80 3.60 3.33 3.50 3.60 3.52 3.52 3.38 3. 60 3.58 4.25 3.70 3.50 3.45 3.40 3.35 3.30 3.22 3.20 3.04 3.50 3.33 3.22 3.14 3.17 3.18 3.15 3.13 3.12 3.13 3.37 3.28 3.20 3.07 3.02 3.06 3.02 3.00 2.97 2.95 2.92 3.47 Dis- charge, Scc.-ft. 1.0 1.2 1.4 13 23 30 105 133 84 62 132 30 4.5 3.9 21 4.8 16 5.2 1.0 2,500 3,440 1,090 946 457 236 162 50 130 200 105 105 7.1 163 141 457 165 96 98 67 43 29.8 23.1 10.3 15.2 152 100 65 38 18 108 1911. Mar. 10 11 Apr. 18 May 9 Oct. 9 1912. Mar. 27 28 29 30 Apr. 13 May 1 June 6 29 1913. Mar. 15 16 17 18 Apr. 15 1914. Jan. 27 1915. Jan. 2{ Mar. ,3 4 Apr. May 18 June 21 July 8 Aug. 2 1916. Feb. 20 21 Mar. 13 A 15 18 18 21 Apr. 15 21 26 May 8 27 .June 12 28 July 17 Aug. 12 29 W. v. Hardy . . .do :... .do .do -do .do..-- .do .do .do -do -do W. V. Hardv. ....do \. ..-.do.... ....do F. C. Ebert... F.C. Sbert. ....do ....do H. r>. McGla F.C. Ebert. F. C. Ebert. ....do ....do .do.. .do.... .dn.... H. P. McGlashan. ..do.. K. li. Slepi3y. F.C. Ebert... K. B. Bleppy. F.C. Ebert:.. ,.do.. Ebert and Keenaa F.C. Ebert R.W.Day....... B. W.Dav.. F.C. Eb^:-ft. R.W.Day.. Gage height. Feef. 3.95 3.60 3.10 3.03 F.C. jrocit... 3.03 McClar.g and Kills F. C !• bort 2.18 2.07 do 1.81 F. C. Ebert 5.50 do 6.55 do !!!;;do!;";;!;!;!!!;!]" do do 6.35 5.35 5.20 6. 22 5.40 do do 5.25 6.13 5.16 do 6.12 D. A.McCiang F.C. Ebert do do.... 5.02 5.00 4.94 4.89 do ^^'> -3.50 3.52 3.30 3.20 3.62 3. 94 2.93 2.88 2.86 2.87 2.80 2.60 2.85 2.62 2. 56 2.52 2.42 4.35 2.80 2.37 2.32 2.43 2.40 2. 33 2.17 a Estimated, SAls DIEGO EIVEPv BASII^. 67 Daily discharge, in second-feet, of San Diego River at Laleside, Calif., 1907-1916. 9.. 10.. 11. 12., 21., 22. 23.. 29. 30. 31. 83 100 145 122 83 83 230 475 145 83 122 170 145 145 1,050 419 303 303 260 217 142 142 142 95 Feb. 260 142 105 105 40 45 32 42 240 124 102 77 75 72 65 530 310 318 330 264 208 187 215 210 151 147 170 140 115 122 200 168 940 595 345 235 200 220 Apr, 222 254 258 260 225 196 200 172 172 172 148 125 128 145 145 127 108 108 108 108 91 91 110 88 106 May. 23 23 23 23 23 23 23 35 23 23 23 23 23 23 13 28. 29. 9 10 0.5 .3 .3 ■X :: .3 !3 .3 .3 .3 .3 .3 .3 .3 .3 11 12 ... . 13 14 15 16. 17 18 19 . . . 20. 21 22 .... . 23... . 24 25 26 27 0.3 .3 .3 .3 ■M 1.0 1.0 1.0 1.0 1.0 1.0 I 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 13 1.5 1.0 1.0 1.0 3.0 23 30 Apr. 300 110 21 28 205 1.55 140 180 112 84 81 80 50 132 62 ' 61 : 35 26 [ 26 i 26 26 26 18 12 16 14 12 68 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of San Diego River at Lakeside^ Calif., 19G7-1916 — Con. Day. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. 1908-9. 1 0.2 .2 .2 :i .2 .2 .2 .2 .2 .2 .2 1.0 5.0 10 8.0 6.0 4.0 3.0 2.0 1.0 a 2, 550 850 200 162 160 120 200 165 95 55 50 45 55 235 145 110 110 1,310 225 170 285 285 810 390 265 240 215 170 150 150 850 320 290 240 220 200 200 145 135 125 105 110 105 105 105 100 70 70 75 75 50 50 50 50 55 55 55 55 180 160 175 150 105 300 390 265 190 150 135 120 105 85 105 125 100 96 96 96 97 98 92 88 80 74 67 63 59 55 51 47 43 42 40 39 37 36 34 33 31 30 29 28 27 26 25 24 23 22 22 21 20 19 19 18 17 16 15 15 14 13 12 11 10 10 10 10 10 9 9 9 9 9 9 9 S 8 8 s 8 8 8 7 7 6 () 6 6 6 6 6 5 5 5 5 5 5 5 3 3 3 3 3 3 1 2 2 2 2 2 2 2 1 1 1 2 1 3 260 4 125 5 125 6 2 7 1 8 1 9 10 11 12 13.„... 14....... 15.... 16 1?.... . O.l .1 .1 .1 .2 .2 .2 .2 .2 '.2 .2 .2 .2 18 19... 20 21 22.,... 23. 24. 25 .. 26 . 27 28 29 30 31 I>a}'. Dec. Jan. Feb. Mar. Apr. May. June. July. 1909-10. 391 462 355 273 217 184 149 149 120 156 138 158 120 102 102 238 355 176 138 120 102 86 71 62 59 80 70 62 65 56 50 65 86 70 56 36 56 50 58 56 56 43 41 30 27 35 27 38 44 59 124 62 46 44 46 49 37 39 40 3S 30 22 22 20 30 32 32 24 18 27 17 12 25 15 17 17 20 17 22 23 22 20 43 54 125 194 176 109 69 62 74 64 52 47 54 47 32 29 32 52 80 54 43 30 26 18 22 20 14 11 11 6.0 2.7 4.3 2.0 1.2 1.0 1.2 3.6 3.6 3.6 3.0 5.0 2.4 3.0 2.4 2.0 1.6 1.6 1.2 1.2 1.2 .6 1.0 .8 1.0 1.2 .8 1.0 1.0 .8 1.0 1.2 1.2 1.2 1.2 1.0 .8 .8 0.6 .6 .6 .2 .2 .2 .3 .6 .6 .4 .2 .1 .1 .4 .3 .4 .3 .4 .3 .3 .3 . .4 .4 .4 .4 .4 .6 .4 .4 .6 0.4 .4 3 .6 4 .6 i 1 1 1 1 225 30 6 4 3 2 2 2 2 4 75 90 50 85 35 20 20 20 15 15 15 .6 f). ... .6 7 .3 8 .2 9 10 13 14 15 16 17 18 19 20 23 24 25 25 27 30 31 ; Maximum discharge 3,700 second-feet. SAI^J" DIEGO RIVER BASIN. 69 Daily discharge, in second-feet, of 8 an Diego River at Lakeside, Calif., 1907- 1916 — Con. Day. Jan. Feb. Mar. Apr. May. June. Day. Jan. Feb. Mar. Apr. May. June. 1910-11. 1, 2 4 18 655 375 123 93 43 32 18 14 16 37 295 116 84 56 38 290 167 113 80 120 117 140 176 133 105 75 72 17 88 44 33 29 29 57 83 55 43 32 22 16 16 16 9 9 3 2 .3 .3 .3 .3 .3 .5 .2 .2 .2 .2 '.2 2 .2 .2 .2 .2 '.2 .2 .2 .2 .2 .2 .2 .2 1910-11. 16 97 65 50 40 37 23 18 20 18 24 37 30 56 67 58 52 46 40 40 40 40 35 32 27 20 21 17 15 17 18 12 12 10 8 8 11 11 7 7 5 10 11 10 9 1.2 .4 .2 .2 .2 '.2 .2 .2 .2 .2 .2 .2 .2 '.2 0.2 2 17, .2 3 18 .2 4. . . 19 .2 5 20 .2 6 21 .2 7 22 .2 8 23 .2 9 24 .2 10 .2 11 26 32 22 14 14 12 14 .2 12 27 .2 13 28 .2 14 29 .2 15 30 .2 31 Day. Mar. Apr. May. June. July. Aug. Day. Mar. Apr. May. June. July. Aug. 1911-12. 1 150 103 82 64 64 64 56 42 42 73 202 307 260 2^5 260 29 35 35 29 23 20 16 145 195 95 55 55 38 38 26 2 .5 '.5 .5 .5 1.5 1.5 1.5 .5 .5 .5 .5 .5 .2 0.2 .2 '.2 .2 .2 .2 *.2 .2 .2 .2 .2 .2 .2 .2 0.1 .1 .1 1911-12. 18 26 21 16 12 9 12 46 100 21 16 02 146 62 46 150 202 245 202 125 103 82 82 64 64 48 48 42 35 35 35 35 26 16 16 16 IG 12 15 15 15 15 14 13 8 6 0.2 .2 .5 .2 .5 .5 .5 .5 .2 .2 .2 .2 .2 1.0 .5 0.2 .2 .2 2 17 3 18 4 19 5 20 C) . ... 21 7 22 8 23 9 24 10 285 100 6 184 146 46 25 11 26 12 27 13 28 14 20 15 30 31 Day. Feb. Mar. Apr. May. Day. Feb. Mar. Apr. May. 1912-13. 1 30 30 25 15 . 25 20 15 15 10 10 15 25 35 35 12 16 16 11 11 11 11 7 10 7 1.5 2.0 1.5 0.2 .2 '.2 .2 .2 .2 .5 .2 .2 '.2 .2 . 2 '.2 1912-13. 16 12 15 3 8 17 25 10 24 38 42 23 23 13 13 8 1.0 1.0 1.0 1.5 1.0 1.0 1.0 .5 .5 .5 .5 .5 .3 2 2 17 2 3 . ]8 2 4 19 .2 5 . . 20 2 6 21 2 7 22 .1 8 23 9 24 10 25 1 40 25 40 11 26 12 27 13 28 14 29 15 0.3 30 31 .... 70 SURFACE WATER OF PACIFIC SLOPE, SOUTHER]N^ CALIFORIStIA. Daily discharge, in second-feet, of San Diego River at L(d:eside. Cal'f.. 1907-1916 -Con.. 9.. 10.. 12.. 13.. 14.. 15.. Apr. May. 1.5 1.5 1.5 Bay. 2.5 2. 2. 12. . 13.. 19.. 20.. ^5 1 1 26 ! 27 ! . - 28 i 29 160 30 900 31 270 97 280 905 1,580 608 410 171 234 200 131 143 270 200 143 131 143 Apr. 217 200 May. ; June, j July. 530 1,290 64 63 SAN DIEGO PvIVEK BASIN. 71 Daily discharge^ in secoud-feet^ ofScm Diego River at LaJceside, Calif., 1907-1916 — -Con. D' Day. Feb. Mar. Apr. May. Jrme. July. Aug. 1915-16. 1 1, 530 695 570 495 360 332 332 392 255 202 210 210 28,0 255 31(5 255 265 305 332 316 532 332 219 202 202 232 332 255 265 425 265 280 280 332 305 210 232 232 190 190 178 202 190 178 192 . 178 138 135 265 397 390 430 350 340 380 325 270 220 170 155 155 155 150 150 140 135 130 120 120 120 120 120 125 110 98 85 77 74 70 67 64 61 65 66 66 64 61 59 56 54 51 49 44 41 39 36 36 38 36 43 43 35 31 34 26 26 23 31 31 31 31 34 34 31 31 26 25 24 23 21 20 19 18 18 15 14 13 11 10 9 8.5 8 6 6 I 5 5 4 4 4 3 3 3 3 3 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2 2 2 2 2 2 2 1.8 1.5 1.5 1.5 1.5 1 1 1 1 1 .5 .5 .5 .5 0.5 2. 3 ... 4 , 5 6 7. 8 9 10 11 1-2 13. . . 14.. 16 16. .. .. . . 17 .. 18 ... 19 ...... . 20 . . • 21 22. . 23 24 25 . . . ?6. 27......... 28 ... . 30 3'.. . II — \f •^ J II C01 I'li cun .?iTC]i . Daily discharge determined as follows: ic'l from gage heiglits, preciioitoi ion rocords, and local ^ond-foct; Feb. 13 to . cleiincd b&tweon 16 ;,? ^vei^deill2ed rating ;urvc iajrly W(;ll defined between 30 and ISi- s; 'lar. 12 to Apr. 16, from rating cm-ve fairly v.e 1 i-g-control method; Apr. 25 to July 8, from fair '') IV h ui iHi;.! method; May 11 to June 30, estimated. ' ' "^t ! i() :) 1 -^ s"! IP c ,^1 method. 1 (, ) ; ' 1 s' 1 I m:; co"frol method. o ?a I '^i 6 -"o Y"i.x 6 from fairly well-defined rating curves. Jan. 31 to Feb. 5, 1914, gage- 'i( -,11 1 ■) lis h gc '^-. iraited from discharge measurements. Mar. 7 to June 13, from poorly 1*> o T-, I 2Q 10 \ ig o, by '='hifting control method and from fairly wcil-defined rating curves covering blio ( oei'oib. 72 SUKFx4CB WATER OF PACIFIC SLOPE, SOUTHEEI^ CALIFORITIA. Mordhly discharge of San Diego River at Lakeside, Calif., for 1906-1916. Horxth. Disch arge in second- feet. Eun-off (total in acre- feet). Month. Discharge in second- feet. Run-off (total in Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1906. January 212 252 3,800 890 170 51 2.8 .8 .3 0.6 1.4 15 105 39 2.8 .8 .4 .0 16.7 43.6 683 277 65.7 15.1 1.2 .6 .1 1,030 2,420 42, 000 16,500 4.040 '898 , 74 37 6 1910-11. 32 655 290 88 9 .2 .0 2 15 5 .2 .2 3.5 84.1 75.3 24.2 .98 .20 215 February March February March . 4,670 4,630 1 440 April Anril May May ' 60 June June 12 July The year.... 1911-12. .. March 655 .0 15.2 11,000 September 285 307 195 2 .2 .1 .0 35 2 .2 .1 .0 55.3 109 33.7 .58 .16 .01 The period.. 67,000 3,400 6,490 2,070 34 1908-7. 152 1,050 260 940 320 83 23 .6 27 32 60 68 23 .6 .2 11 183 87.6 242 157 45.4 15 .44 676 11, 300 4,870 14,900 9,340 2,790 893 27 December June January July 10 February August 1 The year 1912-13. February March .April 307 .0 16.5 12,000 Jurfe Jul >'.... 40 42 10 .2 .0 3 .3 .0 3.80 19.4 5.48 .15 211 1,190 326 T'he year 61.8 44, 800 May 9 1Q97 8 .5 1 100 2no 130 30 .5 .2 .1 l"' 14 12 4 ^ ."2 .2 .6 15.5 76 44 11.6 5 .4 .1 3 953 4,370 2,700 690 307 24 6 The year 1913-14. January November 42 .0 2.40 1,740 January. February- 908 908 54 20 20 1.5 .0 .05 1.5 1.5 1.5 .0 48.8 110 14.5 4.55 4.39 •.48 2,880 6 110 Mareii February March Ar^YH '892 M^^ Apri' 271 May . 270 J^%^---- June 29 The year 1914-15. January February March . . . 12,4 9, 100 908 .0 14.4 10,500 1908-9. iJecember January... February. .2 2, 550 1,310 390 135 31 9 5 260 .0 ,2 4.5" 50 6 1 .0 .08 148 2Si 122 74.5 18.2 7.17 3. 19 16.6 9, 100 1.5, 600 7, 500 4.430 1, 120 427 196 1,020 900 1,580 270 432 1, 290 G7 6 .1 .0 36 44 13 77 7 .1 .0 42.9 270 124 84.6 276 27.3 1.08 .02 2, 640 1.5,000 7,620 5,030 17,000 1,620 66 April May. May June July July iiugust . . 1 The year.... 1915-16. January Febrxiary March 1,680 i;536'"" 430 155 54 21 2.5 .5 .0 .0 202 135 56 23 3 .5 .0 67. 6 49,000 The year 2, 550 .0 54.5 39,400 2,420 361 2.59 98.4 35.0 8.78 1.65 .032 1909-10. December. 925 '162 124 194 80 .6 .0 50 27 12 1 .6 .1 .0 23.5 156 49. 5 41.4 31.7 1.68 .38 .12 1,440 9.590 2:750 2, .550 1,890 103 23 7 149,000 20,800 15,900 5,860 2,150 522 Feliruary. March April Miy June May . . July August 101 2 Jply .0 267 194,000 The year 462 .0 25.4 18, 400 Note.— Discharge for January, 1916, estimated from study of mean rainfall computed for drainage area conipared with record of flow on San Diego River at diverting dam and at San Diego. No flow in months for y-iiich record is not given. SAN DIEGO EIVEE BASIN. 7^ Comhined daily discharge, in second-feet, of San Diego River and flume near Laleside, Caiif., for 1907-1916, Day. Oct. Nov. Doe. Jan. Fpb. Mar. Apr. May. June. July. Aug. Sept. 1907. 1 92 110 52 37 35 152 129 93 8S 23-1 477 149 88 128 173 IJR 149 1,0.50 421 305 306 2r,3 219 145 143 infi 97 97 101 146 96 5.5 5.3 4.9 4.9 4.7 3.4 3.2 3.3 3.3 4.9 5.3 6.9 6.9 IS. 5 29 30 7.8 0.5 6.5 8.0 8.5 11 33 41 77 41 65 110 73 46 261 143 106 106 96 96 84 76 76 62 46 44 50 37 48 240 129 106 79 77 74 70 60 51 83 84 68 26 25 ill 306 117 51 49 SO 3? 211 161 146 187 114 86 86 88 4,S 50 50 60 66 64 54 44 34 3i 38 74 78 62 71 534 314 322 332 2i"6 210 189 218 213 154 150 173 143 118 125 114 294 28't 240 205 172 943 698 349 239 203 45 43 53 134 117 80 64 63 50 3? 38 38 30 30 30 30 30 30 31 30 22 21 16 18.5 65 98 64 39 30 SO 229 261 326 265 267 266 231 202 208 178 178 180 156 132 135 152 151 133 114 114 114 118 102 102 121 99 117 79 94 114 23 25 24 24 22 22 20 17. 5 15. 5 16 16 16 14.5 14.6 14.5 15. 5 14. 5 1.3.5 14. 5 19.5 39 40 32 24 18.5 15 15 94 74 73 73 88 84 104 82 66 65 67 67 66 62 48 •17 45 37 38 38 37 38 40 44 45 Ji 42 iO 40 X9 39 ]." 16. 5 18.5 37 27 25 23 20 15. 5 17.5 16. 5 17 15. 5 12 5 12.5 10.5 9.5 8.1 8.5 7.6 7.8 6.7 6.9 8.2 8.9 8.9 8.2 8.2 8.5 39 36 34 S3 30 30 30 43 32 31 32 32 35 39 21 20 21 17 16, 5 16 17 18 17.5 17.5 16. .'■■ 13 7.1 G,S 6.7 6.3 6.3 6.3 6.3 7.4 8. 6 8.1 7.0 7.1 7.-} 7.S 7.8 7.8 7.3 l-l 1.1 7.9 7.9 7.7 9.3 9.6 11 11.5 11 11 11.5 11.5 11 10 9.9 8.8 ».G 10 11 11 10. 5 9.2 10 10.5 10 9.9 10 10 10. 5 10.5 11 9.8 7.7 1:1 1:1 7.0 7.0 7.4 8.2 8.4 8.6 8.2 8.2 8.4 8.4 8.6 8.9 7.8 7.1 6.0 6.0 S.l 8.3 7.8 8.1 4.3 6.8 7.2 7.0 7.2 8.4 9.5 8.7 8.2 7.5 7.5 7.7 7.2 7.0 6.3 7.0 8.4 8.7 9.7 9.5 9 5 14 10 9.7 9.7 10 10. 5 9.5 8.2 7.7 7.5 8.C 9.C 9. ■/ 9.5 10 10.5 8.7 8^2 7.2 7.7 6.1 6.8 7.7 4.1 1.8 3.0 s'.o 7.7 7.2 7.5 8.2 8.0 8.0 8.0 8.0 8.2 10 2 8.2 3 6.8 7.5 5 10 r> 9.5 7 9.2 8 8.0 8.2 10 9.7 11 9.7 12 iO 13 10 14 10.5 15 10.5 \n, 9.7 17 10 18 10 19 10.5 20 10.5 21 9.2 5.7 23 G.l 2J 10 25 10 2'!) 10 27 9.7 2S 10 29 8.7 30 9.2 31 1P07-8. 1.. . 9.2 8.4 S.O 7.7 8.2 7.5 0.3 6.8 6.8 6.6 6.1 6.3 9.2 8.4 7.0 .5.5 5.3 5.7 3.7 5.0 7.0 5.7 6.3 6.8 G.l 0.3 6.G 2.9 3.2 3. '^ 3^9 4.6 4.6 2.8 4.9 4.6 4.9 "1 1.0 2.0 .7 1.5 I3 .6 6.4 7.1 7.1 7.3 2.5 4.6 3.0 G.2 2.6 6.0 2.7 7.7 7.5 2.2 1.4 2.0 1.1 1.2 4.1 .9 .7 .() 1.0 2.3 2.7 4.6 2.2 2.7 4.6 1.0 2.5 4.6 6.9 10 3.9 7.7 2 6.8 3 7.2 4.. 8.2 7.7 fi 6.3 7 5.9 8 0,1 9 7 2 10 7.7 11 G.3 12... . 6.3 13 5.0 14 6.1 15.. 7.2 10 8 2 17 8 4 18 19 8.4 8 7 20 7.0 21 6.8 22 6 3 23 8.4 24 9.7 25 6.3 26 9 2 27. .. .. _ 9 2 28 9.2 29 8 7 30 . 8 31 74 SURFACE WATER OE PACIFIC SLOPE, SOUTHEPvK CALIFOEE-IA. Cvrn.hined daily discharge, in second-feet, of San Diego River and flume near Laleside, Calif. , for 1907-1916— -Gontmiied. Oct. Nov. 7.0 5.9 8.0 5.5 8.0 4.S 7.5 5.0 7.2 5.5 G.8 5.3 6.3 4.6 0.1 4.3 5.9 4.5 7.7 4.S o.s G.l 6.8 6.1 7.5 5.9 7.5 5.7 7.5 5.7 8.0 5.7 7.7 5 5 6.0 5.9 4.G 6.3 5.3 5.9 G.8 4.8 0.6 4..S 6.1 5.3 6.3 5.7 2.6 5.7 2,7 6,1 0.3 5.6 7.0 5.7 7.2 5.5 7,0 5 8 6 6 6 6 5 6 6 7 6 7 C 7 6 G G G 7 7 r, (: 6 G 6 5 4 G 3 3 4 4 (■' G 8 6 5 5 an. Feb. ilar. Apr. May. Jxme. My. Aug. 63 135 139 43 19 10 6 H 50 125 124 42 17 10 8 5 58 105 107 41 17 11 268 8 239 111, 90 40 16 12 133 2 148 100 109 39 11 12 133 2 113 105 129 38 9 11 10 2 113 105 105 38 10 12 7 2 1.320 100 104 37 17 12 7 3 2':'0 75 104 30 10 11 7 G 172 72 104 35 K) 11 8 6 288 70 105 34 10 12 8 (; 289 75 100 33 1.5 12 8 4 815 55 100 83 13 12 7 10 395 53 93 32 10 11 10 IG 268 53 S9 32 17 4 10 211 51 85 30. IS 10 10 218 £('i 78 29 17 10 u 172 57 74 29 IS 10 11 1.50 55 71 28 18 10 7 9 150 02 00 28 10 10 8 9 858 '^.0 03 27 14 10 9 550 320 1S5 58 20 13 9 9 SoO 290 lOi \ 55 24 12 11 9 204 240 1.^4 54 21 12 13 10 109 220 153 51 22 12 11 10 171 003 50 22 12 10 10 13 i -jrw") f^05 -r.) 21 12 10 9 21! InO 3r'4 A:^ 22 13 10 179 47 22 13 9 7 109 JO 21 11 8 8 (■0 20 ^ 7 308 _ 40 -r 16 9 6.7 400 8f) 07 10 10 9 7.8 3.^8 30 79 15 10 9 8.5 275 29 50 14 10 9 8.5 219 ■■•■' 54 10 10 8 7.0 i*;J- 00 25 49 14 10 10 8.3 149 00 30 57 1-i 10 9 8.0 149 5!) 32 54 13 9 8 7.6 120 50 32 40 12 9 7.4 7.8 159 50 28 33 11 7 0.4 8.3 143 44 27 34 11 Q 7.1 7.3 160 44 30 54 10 6 7.6 8.0 124 38 25 S3 10 8 7.8 8.7 100 32 14 59 10 9 8.5 7.8 107 30 14 52 11 9 8.3 8.0 212 07 20 40 11 9 8.3 8.5 359 23 23 do 9 9 7.0 8.7 180 36 25 28 9 8 7.1 8.7 141 44 24 34 9 8 7.0 9.0 123 50 27 31 9 8 7.8 8.3 105 125 24 28 10 8 7.6 7.8 89 50 29 24 10 9 7.8 8.3 73 49 31 23 9 9 8.0 8.0 04 46 30 16 8 9 7.4 5.3 61 40 27 15 8 9 8.0 G.7 80 55 51 17 9 9 8.7 6.9 VO 42 58 14 9 9 8.5 6.9 02 40 126 14 9 9 7.1 5.4 72 196 14 9 8 G.4 5.4 58 170 9 9 8 6.0 7.1 .'">(* 110 10 0.4 8.3 2 1 2. 4 3.8 8 230 38 15 13 SAls DIEGO EIVER BASIIT. 75 Combined daily discharge, in second-feet, of San Diego River and flume near Lakeside, Calif. , for 1907-1916— Gontinwed. 9.0 9.0 10.2 10.9 8.7 7.6 7.8 8.7 10.2 9.9 5.0 4.2 6.9 7. 4 6. 7 I 5.8 6.2 5.6 6.0 '. 0.0 .0 .0 .0 i 2.2 i .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 5.8 6.0 6.8 6.0 4.8 2.2 4.6 6.9 7.6 6.9 7.4 7.1 5.8 5.6 3.0 .6 .4 2.8 4.8 5.4 5.2 5.2 4.4 3.2 3.0 5.0 5.8 4.6 4.6 4.4 0.0 .0 .0 .0 4.2 4.0 4.8 6.4 6.7 5.6 3.3 6.2 5.6 4.6 5.0 4.8 4.8 5.8 2.3 1.8 3.9 5.2 4.6 4.2 4.6 9.5 9.5 8.7 6.9 3.2 4.2 6.7 40 32 22 24 22 1.0 .0 3.0 20 47 306 127 108 74 61 51 48 38 : 34 31 ■ 28 59 I 30 ' 27 G4 41 292 170 116 82 122 121 144 180 136 107 76 48 47 40 S9 1.0 , 1.0 1.0' 1:0 1.0 1.0 1.0 2.0 5.0 0.8 6.4 9.0 1.0 1.0 LO 1.0 1.8 1.5 1.1 1.3 1.1 1.0 1.1 1.0 1.0 111 17.7 195 150 60 30 26 23 158 75 60 165 215 Apr. May. June. July. Aug. 27 20 6.4 7.8 96 20 5.8 8.3 56 15 3.4 .9 7.8 36 12 8.2 7.1 7.1 41 12 8.2 7.6 7.4 40 9.8 5.6 8.0 7.1 67 11 3.6 7.1 7.4 93 11 3.0 1.0 2.4 67 9.8 2.9 54 9.2 1.4 44 8.7 2.9 34 8.7 1.2 16 8.0 1.5 .9 16 7.8 •1.1 7.4 6.7 29 8.7 5.8 8.5 7.4 29 9.7 6.6 7.4 7.8 26 8.2 7.8 5.0 8.5 27 7.3 7.6 4.8 9.0 25 7.1 1.2 4.6 8. 5 24 5.8 .2 5.8 7. () 20 4.6 .2 7.6 5.G 23 2.7 .2 8.5 3.0 26, 4.6 3.0 1.7 1.2 22 8.2 7.6 Q 1.3 20 8.7 7.8 1.8 18 9.3 8.2 3.2 23 9.7 8.5 6.7 19 9.7 2.0 7.1 21 7.8 .2 1.0 6.9 20 6.0 .2 6.2 5.8 6.2 7.4 6.7 164 40 16.2 8.9 5.7 117 40 13.6 7.8 4.7 96 42 12.5 7.6 7.7 77 43 11.4 8.0 8.0 78 36 11.2 7.8 8.5 78 35 11.2 6.6 8.7 70 29 11.7 8.5 8.0 58 157 11.0 10.4 8.3 57 206 10.5 6.6 3.9 88 106 10.2 7.8 8.0 216 61 •10.0 7.8 8.7 319 61 9.5 8.2 8.5 268 43 8.5 8.7 4.6 254 46 9.0 8.7 4.0 270 36 8.7 8.5 5.8 258 33 7.8 7.3 7.1 214 28 6.6 7.6 6.7 137 31 4.4 6.9 7.4 116 31 5.8 7.5 7.0 95 31 7.6 8.6 7.6 95 28 8.0 7.7 5.2 30 10.9 8.1 4.2 72 30 11.2 7.9 2.0 62 28 11.4 8.6 1.5 62 29 10.6 7.9 S.0 57 28 9.2 6.3 7.8 50 27 9.2 5.7 1.1 49 22 9.7 7.0 .0 50 21 11.2 8.1 .0 50 21 12.2 8.1 A. 16.4 6.8 2.2 Sept. 76 SURFACE WATER OF PACIFIC SLOPE^ SOUTHERIS!' CALIFOPvNIA. Combined daily discharge, in second-feet, of San Dieao River and ftume near Lahesidcy Calif., for 1907-1916.— QontiuuQd. I)ay. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. Jime. July. Aug. Sept. 1912-13. 1.. 1.4 2.1 2.1 2.3 8.7 10 11 8.7 5.6 3.1 1.2 .2 2.0 2.0 4.2 2.5 4.2 3.6 3.3 4.2 4.0 4.2 4.0 3.6 4.0 4.2 2.3 2,5 2.3 2.1 2.5 2.0 1.8 .4 is •'? 1.4 "4 .5 1.0 1.0 1.4 1.0 .9 l.G . 5 .0 .0 .0 .0 .0 .0 .0 .2 .0 2.6 2.5 2.6 2.0 2.1 3.1 3.3 2.5 2.8 3.0 3.0 3.1 2.6 2.6 2.5 2.5 3.0 2.5 Si 2.1 2,0 2.0 2.0 2.8 2.6 2.1 2.0 2.0 2.1 2.1 1.6 1.6 2.3 2.8 2.5 2.8 2.3 2.0 1.8 1.8 2.0 2.3 2.1 2.3 2.1 2.3 2.5 2.3 2.5 2.1 2.3 3.0 2.8' 3.1 2! 8 2.5 2.3 2.3 3.0 2.8 2.3 2.0 2.0 1.7 .0 .0 .1 .2 .2 .2 6.9 0.6 6.0 4.2 4.8 7.3 7.5 7.5 6.9 7.1 5.4 7.1 6.4 a 2 4.6 4.0 3.3 4.0 3.0 2.8 2.8 2.5 2.3 2.1 5.0 2.6 3.6 4.0 4.2 4.6 5.8 5.6 5.6 6.0 6.9 4.8 3.5 3.6 3.5 3.3 3.5 4.4 7.7 7.1 9.7 48 34 48 18 13 11 11 13 8.7 11 12 12 12 13 14 13 13 13 10 12 12 12 551 922 533 332 378 128 107 87 78 38 38 32 21 22 34 29 25 24 19 20 24 33 45 45 14 25 21 16 22 28 34 20 35 45 52 33 34 24 24 19 69 62 54 48 48 41 39 37 33 32 30 29 28 28 25 25 24 23 23 22 22 21 20 19 19 19 20 25 28 25 25 20 24 26 21 21 25 20 16 10 19 15 23 11 13 14 12 13 14 14 14 14 14 10 8.0 10 8.2 8.2 6.7 5.5 7.2 26 27 22 19 19 20 19 20 18 18 18 18 18 16 15 15 14 14- 12 8.1 10 14 29 24 25 24 22 21 21 36 7.7 7.3 4.2 3.8 4.6 4.2 4.2 4.1 3.7 4.2 4,4 4.6 4.6 4.8 4.0 4.2 2.8 2.8 2.2 2.2 2.2 1.9 2.0 2.0 2.1 2.8 2.6 2.8 3.1 2.8 2.6 36 27 27 27 26 22 21 19 15 19 17 16 .16 15 15 14 14 15 14 12 12 10 11 10 10 11 11 10 9.7 8.5 8.1 3.3 4.8 3.5 4.4 4.0 3.5 3.1 3.0 2,8 4.0 3.6 4.2 5.0 5.0 6.6 6.0 6.0 5.6 3.6 3.5 4.0 5.4 7.1 6.4 6.2 6.4 6.0 7.3 6.6 6.8 H 7.' 3 7.1 6.6 6.6 6.8 8.5 9.1 7.8 4.0 5.5 6.0 4.2 4.2 2.8 .8 .5 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 5.8 5.4 6.4 4.2 5.8 3.6 3,6 4.4 6,4 6,4 6,2 5.8 6.0 6.8 5.8 6.0 6.6 6.4 6.2 6.4 6.2 4.4 4.0 3.5 3.3 2.6 2.6 2.8 4.0 3.6 3.8 .0 .0 .0 .0 .0 .0 .0 .0 .0 4.8 2.4 3.5 6.0 6.0 3.7 6.8 6.2 5.2 5.2 5.4 6.2 6.0 6.0 4.8 5.0 4.8 4.8 4.6 5.0 5.0 6.0 3.5 3,3 2,8 2,5 2,6 2.8 2,1 1.8 2.5 2.1 2.3 2.5 2.1 2.1 2,0 2,3 2.3 2.3 2.8 3,0 3.5 3,1 2,6 2,5 2,5 2,1 2.5 3.1 2.8 3.3 3.6 5.0 4.8 3.8 3,8 5.8 4.0 6.0 6.8 5.0 4,0 4.4 3,3 3,8 4.4 5.0 5.0 5.0 5.0 3,7 4.4 5.0 6.0 5.0 4.0 4.2 4.6 4.8 4.8 5.0 3,8 4.4 2.8 2.0 1.4 2.5 1.3 .7 2.1 2.8 3.0 1.8 2:f 2.5 2.3 2.5 2 1 2 3 ... 4 6 s 9 10.. ]1.„ 12 ... 13 14 15 16 17 , ... lis 1.4 2.0 2.0 2,0 1.6 2.1 1.8 2.0 1 6 18... = 19 20 21 22 23 24 .......... 2b...... 28 27... 1.6 2S 1.4 1 4 29..... . . 30. ..... . ... 1.3 31... 1913-14. 1 5.2 5 4 3 5,2 4 5 2 6 4,8 4,8 6 .. .. 4.8 8 . 4.8 9 4.8 10.. . 3 3 11 . ..... 3.8 12 4.0 13 3,5 14 3.3 15 . 3.5 16 . . 3.8 17 3,8 18 3.7 19 3.5 20 3,5 21 3,2 22 3,2 23 3,3 21... 3.5 25 3.5 26 .1 908 392 96 41 22 3.3 27 3.2 28 2.8 29 2.8 30 . 3.0 31 SAi^ DIEGO EIVER BASIN. 77 Combined daily discharge, in second-feet, of San Diego River and flume near Lakeside, Calif., for ^507-^916— Continued. July. 3.3 3.5 3. J 2.5 2 A 2.5 1.1 1.8 1.1 1.8 1.8 2.0 2.0 2.0 2.0 2.0 2.0 2.1 2.2 2.0 2.0 2.0 1.8 2. J 3.0 2.8 3.5 4.8 3.8 3.! 3.8 5.0 2.3 1.5 1.0 1.3 1.5 .3 3.3 4.1 3.3 3.8 3. 4.1 3.7 2.3 2.5 3.0 3.2 3.0 2.8 2.1 -2.2 2.0 2.2 2.1 2.2 2.3 2.1 2.3 2.3 2.1 1.5 13 16.5 18.5 14.5 17 12.5 168 910 284 116 300 911 295 142 71 57 270 410 346 171 234 202 134 160 282 216 161 152 164 238 164 137 236 236 218 204 171 207 162 144 127 112 90 90 83 73 65 64 72 66 64 66 60 42 42 42 42 42 38 58 46 442 196 210 201 141 166 105 264 356 490 515 540 1,300 587 420 424 454 256 222 222 208 165 162 250 227 188 156 140 141 117 125 126 113 100 GO 76 75 73 74 75 57 53 51 43 37 36 38 31 30 30 25 26 24 24 19 18.5 14.5 12.5 13 14.5 11.5 11 9.< 11.5 8.3 8.5 8.8 10 10 10 10 9.3 9.9 6.0 6.8 7.0 7.0 7.0 7.2 7.2 7.2 7.0 7.5 7.5 7.0 7.0 7.5 7.0 6.5 7.5 3.5 6.0 6.0 6.0 6.0 6.0 6.0 6.0 5.1 5.1 5.1 5.1 6.0 6.0 6.0 6.0 7.5 8.5 4.5 3.0 5.3 3.2 4.1 3.9 3.4 3.4 3.5 3.-; 4.9 5.1 4.9 4.9 4.7 4.7 4.7 7.2 7.8 7.2 6.; 6.5 6.0 10.0 3.2 5.1 5.1 1.8 1.7 1.9 2.4 1.4 1.4 2.9 2.9 7.0 6.5 1.9 2.8 1.7 1,-530 695 570 495 360 332 332 392 255 202 210 210 280 255 318 255 265 305 332 316 532 332 219 202 202 232 332 255 265 265 280 305 210 232 232 190 190 178 202 192 182 196 182 1^2 139 269 402 395 434 352 344 385 330 275 225 175 160 IGO 167 162 163 134 134 141 144 134 108 100 98 90 86 87 84 85 83 70 70 68 67 60 67 66 58 54 67 49 49 48 5-1 53 53 56 58 45 44 38 36 83 29 32 31 30 28 26 28 25 22 22 20 20 20 21 20 18.5 15 13.5 14 12 12 11.2 12 12 15 17 19 14.3 11.5 8.5 7.3 6.5 7 7 8 78 SURFACE WATEE OF PACIFIC SLOPE^ SOUTHERN CALIFORNIA. Corahined monthly discharge of San Dieqa Hlver and Jlume near Lakeside, Calif., for 1907- 1916. Month. Discharge in second- feet. Run-off (total in acre- feet). Month. Discharge in second- feet. Rim-off (total in Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1907. January 1,050 261 943 326 104 43 11.5 14 10.5 35 37 62 79 37 9.3 8.6 6.3 5.7 188 90.5 246 165 57.0 24.4 10.2 8.92 9.24 11, 600 5,030 15, 100 9,820 3,500 1,450 627 548 550 1911-12. October 2.2 .0 3.0 3.0 1.8 289 319 206 16.2 10.4 8.7 4.4 0.0 .0 .0 .0 .9 2.0 49 16.4 4.4 5.7 .0 1.6 0.08 .00 .13 .78 1.06 66.0 122 45.7 10.0 7.81 5.55 2.73 5 February March \ November December January 8 48 May • February 61 June March 4 060 July April 7*260 .2,819 595 August.. September May July 480 341 The period . 48,200 September The year 1912-13. October 162 1907-8 October 9.2 7.3 10 110 306 134 40 37 8.6 8.9 9.2 9.7 2.9 .3 .6 3.2 25 16 13.5 6.7 6.3 4.3 1.8 5.0 6.63 3.36 3.38 21.9 82.6 47.8 20.9 14.2 7.28 7. 58 7.20 7. 47 408 200 208 1,350 4,750 2,940 1,240 873 433 466 443 444 319 .0 21.8 15, 800 December 11 3.3 3.1 7.5 48 26 _ 7:3 6.6 3.6 3.0 .2 2.0 :o 2.1 14 5.5 1.9 2.8 2.6 1.8 3.81 2.47 2.29 3.97 8.70 28.9 14.8 3.62 4.86 4.80 2.62 1.89 234 January February March November December January 147 141 February March ' May . .... 483 May September July 2:)5 306 .3 19.0 13, 800 161 The year — September The -j-ear 1913-1 i. Oetob'^r 112 1908-9. October November 8.0 6.3 5.5 2,550 1,320 394 139 43 19 13 268 11 4.6 2.6 .3 2 50 51 46 20 9 4 .0 5 6.76 5.22 2.74 155 285 124 83.5 30.6 14.7 10.4 23.6 7.40 416 311 168 9,530 15, 800 7,620 4,970 1, SSG 875 640 1,450 440 52 .0 6.88 4,990 2.0 .0 .0 908 922 69 36 38 9.1 6.S 5:1 .0 .0 .0 .0 8.7 19 8.1 8.1 .0 .0 2:8 .64 .0 .0 47.1 120 31.1 19.4 16.1 3.66 3.56 4.59 3.88 39 December January February March :.. April. May..... June.. November December January . 2,900 6,660 1,910 1,150 February March..: May 990 August Juno July August September The year 1 1914-15. 1 Cctober Novejiiuvc Deeeniber January.... 218 September 219 282 The year 2,550 .0 61.0 44, 100 231 1909-10. October November December. .. •January I^'ebruary Majch.. ......... Iprp 8 230 468 .125 196 83 16 10 10 9 10.7 3 1 2 50 28 14 9 8 6 6 5.4 1.3 5.87 4.70 31.3 159 51.2 46.0 39.8 .10.9 8.68 7.89 7.80 8.50 360 280 1,920 9,780 2,840 2.830 2; 370 670 516 485 480 506 922 .0 20.1 14,600 6.3 5.0 4.8 910 1,580 283 442 1,300 76 19 10 11 1.6 .0 .0 1.5 62 35 86 18 7.8 4.9 1.4 2.32 1.81 .99 48.6 282 142 101 289 39.9 11.2 7.62 6.31 143 103 61 2,990 15, 700 March 8,730 May::::::::::::: April May 6,010 17,800 Julv August September 2,370 July 689 August -September The year...- 1915-16. October . 469 375 The year — 486 1 31.8 23,000 1,580 8:5 11.5 .0 76.5 55,400 1910-11. October November December January February........ March 12 7.6 7.8 40 660 292 96 20 8.5 8.5 9.0 6.7 .0 .4 1.8 2.5 13 26 16 2.7 .2 .0 .0 .0 7.27 4.83 4.99 10.1 93.6 80.8 35.3 9.26 4.18 3.47 5.19 3.05 447 287 307 621 5,200 4,970 2,100 569 249 213 319 181 3.5 1 6.35 390 November December 3.0 1.4 4.71 4.74 2,420 361 261 117 57.2 27.4 280 291 149,000 20,800 16,000 February March i,5ao 4^4 167 76 40 18.5 14.5 14.5 202 139 79 42 20 April 6,960 liar . . May 3,520 June 1,630 Jllly July 6. 5 11. 9 5. 3 7. 49 3. 9 8. 72 732 August September... August September Th'^ year 461 519 The year.... 660 .0 21.8 15, 500 276 201,000 SAN DIEGO EIVEK BASIN. 79 SAN BIEGO Kl\»!Em SE^S, SAITTEE, CALTF. Location. — In tract T, El Cajon grant, at old Mission dam. below Spring Canyon and just above Oak Canyon, about 4^ miles west oi' Santee, San Diego County. Drainage area. — 375 square miles (measured on topographic maps). Elevation. — About 275 feet above sea level. Records available. — ^May 25. 1912, to September 30, 1918 (record not complete). Gage.— Staff in two sections installed December 12, 1916; lower section bolted to upstream face of old dam near left end; upper section faBtened to large sycamore tree on left bank just above dam. Original gage was at wame datum and at prac- tically same site except that low-water section was at right of ])reak in dam. Gage datum 566.42 feet above sea level. Discharge measurements. — Made from cable about 500 feet a])OT-e gage or by wading. Channel and control. — Bed composed of sand; eliifting. The old dam serves as part control. May 10, 1913, a concrete weir, having steel plate's for crest and sides, was installed at old break in dam. This weir was parth' destroyed by drift Peb-ruary 2, 1915. The flood of Januarj^, 191G, wrecl-red weir and caused some change in control near left bank. (See Pi. XVIII. A. p. 493.) Extremes of discharge. — 1912-1918: Maximum stage recorded. 25.1 feet January 27, 1916 (discharge, 70,200 second-feet); no flow for several months each year, ex- cept for a small quantity of ground water that rises to surface at dam. Diversions. — See San Diego River at Lakeside. Water for irrigation is pumped from wells along the river below Lakeside. Kegulation. — None except as noted for station at Lakeside. (See p. 65.) Accuracy. — Stage-discharge relation fairly permanent. There have been minor changes in control but all are covered by rating curves fairly well defined except for flood stages. Gage usually read to half- tenths once daily. Daily dis- charge ascertained by applying gage height to rating ta])le. Records good for periods in which gage was read regularly. Cooperation. — ^Gage-height record obtained in cooperation witli Charles Sampson, general manager, La Mesa, Lemon Grove & Spring Valley Irrigation District, and Ed. Fletcher, manager, Cuyamaca Water Co. Discharge measuremenU of San Diego River near Scmlee. Calif ..for j'91l^-1918. Dc-ite. Made by— Gage height. Dis- charge. Date. Made bj-— Gar-e height. DiR.. charge. 1912. Feet. Sec.-ft. 1915. Feet. Scc.-/t. May I 1^' C. Fbert 7.66 33 Jan. 22 Eeeand Sleepy F.C. Ebert 8 14 17 ..do 7.47 23 Jan. 29 12. 26 1,050 11 i<: W.Case 8.79 126 30 do 12.86 1.980 25 K C. Ebert 7.39 7.15 14 ^ 31 Feb. 3 do K. B. Slecr-v n.30 11.85 '492 June 6 A.Eartl 931 Aug. 17 F C.Fhert 7.08 a .05 8 do.,, 9.20 112 Dee. 16 Taylor and Harriett 7.30 f^-.l Mar. 4 F.C.Ebcr; 10.8 430 19 F C. Ebert 7.31 a. 3 9 Apr. 1 do Eberr. and Day 9.77 7.85 219 55 1913. H F. C. Ebert 7.83 51 Feo. 15 \\ . S. Posi 7. 22 a. 3 16 11. W. Dav 7. 37 28 28 1-: W. Case 7.79 26 May 18 F.C. Ebert U. SO 219 Mar. 11 -.do 7. 23 5.4 June 21 McCluiig and iCllis 7. 70 14 14 h' C. Ebert .-... 7.63 25 July 7 F. C. Ebat 6.77 a. I 17 .CO 7 40 14 Aug. 1 Dec. 9 21 do 6 30 a. 05 Apr. 12 "li ..do 7.14 7.07 .6 .2 do 7.62 7.62 a. 1 17 I). McGlashan do.. n.l 1914. 1916. Jan. 27 vv . S. Post 12.6 929 Mar 12 McGls^r.an and Fbe;"t 8 35 206 28 .^. C. Ebert 10.35 8.30 271 23 20 Apr. 13 F C Ebert 8.42 8.07 238 T, "-^ ..do do 155 Feb. 2 ..do 8.00 9.2 15 do..... 7.77 122 Mar. 2 -.do 9.94 69 21 do..... 7.33 69 6 -.do 8.63 49 Apr. 26 do 7.28 76 , 24 ..do 7.73 2.9 May 8 do 6.77 36 Apr. 19 -.do 7.61 a.l , 27 do 6.58 25 May 13 ..do 7.64 a. 3 June 12 do 5.78 1.8 a Estimated. 80 SURFACE WATER OF PACIFIC SLOPE, SOUTHERl^ CALIFORNIAo Discharge tneasurenients of San Diego River near Santee, Calif., for 1912-1918 — Contd. Date. Made by— Gage height. Dis- charge. Date. Made by— height. Dis- charge. 1916. June 28 F. C. Ebert Feet. Sec.-ft. 0.04 a, 02 a. 02 4.7 175 141 39 146 126 105 45 149 85 24 .3 .1 1918. Jan. 4 Feb. 7 Mar. 6 9 11 11 11 12 12 13 14 16 May 8 F. C. Ebert Feet. 3.84 3.84 3.88 3.85 5.35 10.11 11.10 12.8.5 12.20 10.95 8.40 7.10 4.00 Sec.-ft. 2 July 16 Aug. 29 Dec. 19 do do W. J. Isbell '"4." 93' 7.38 6.92 5.72 6.95 6.80 6.52 5.78 7.03 6.40 5.24 3.94 3.82 D. A. McClung. F.C. Ebert do do do do do do do do .....do do.. .09 .26 2 1917. Jan. 22 23 Feb. 15 19 20 Mar. 12 29 Apr. 18 20 May 23 June 28 F.C. Ebert... do do do do do do McGlashan and Ebert.. do F. C. Ebert 38 1,070 1,810 7,810 4,950 1,750 500 191 1.1 D. A. McClung Dec. 23 F.C. Ebert a Estimated. Daily discharge, in secondfeet, of San Diego River near Santee, Calif,, for 1912-1918. Day. May. June. Day. May. June. Day. May. June. 1912. 1.7 6.0 .9 .9 .4 1912. 11 0.1 .1 21. 22. 23. 24. 25. 1912. 2 12 13 ■ 4. . 14 5 15. 14 14 14 7.8 7.8 7.0 7.0 6 16.... . ? 17 27. 28. 29. 30. 31. 18 9 19.. 10 20 Day. Dec. Jan. Feb. Mar. Apr. Day. Dec. Jan. Feb. Mar. Apr. 1912-13. 1 0.3 . 3 14. 5 4 5 2 '.2 5 12 26 16 9 8 8 8 6 6 5 5 12 18 31 28 28 24 24 21 18 16 14 10 6 3 le .6 .4 • .4 1912-13. 16 0.1 0.2 :i .2 .2 .2 .'2 .2 .2 .2 5 12 26 0.3 .3 .3 .2 .1 .1 .1 .1 .1 .1 26 12 10 3 3 5 10 iO 38 38 46 38 28 28 34 31 0.2 2 17 .2 3... .3 .3 .3 .3 .3 .3 .3 .3 .2 .2 .2 .2 .2 18 .2 19 .3 .2 5 20 .2 6 21 .2 7 22 .1 8 . 23 .1 9 24 .1 10 25 .1 11 26 .1 12 27 .1 13 28 .1 14 29 c3 .3 .3 .1 15 30 .1 31 SAN DIEGO RIVER BASIN. 81 Daily discharge, in second-feet, of San Diego River near Santee, Calif., for 1912-1918 — Con. Day. Jan. Feb. Mar. Apr. May. Day. Jan. Feb. Mar. Apr. May. 1913-14. 1 0.1 18 9.7 9.7 6.7 5.4 4.8 4.1 4.1 3.7 2 1 .5 .5 .4 .3 77 74 67 60 54 47 43 39 35 31 27 23 19 15 11 15 9.7 6.7 4.1 3 2.7 2.4 2.1 1.9 ""26" 9.7 1913-14. 16 0.1 50 930 370 116 40 26 0.2 .1 .1 .1 715 2,300 715 418 244 150 110 87 80 7.6 7.6 7.6 5.4 5.4 3.2 3.2 3.2 2.3 2 1.5 2 4.1 6.7 9.1 20 2 17 3 18 .2 4 19 5 20 6 21 7 22 8 23 9 .... 24 10 25 11 26 12 27 13 .3 28 14 29 15 30 31 Day. Jan. Feb. Mar. Apr. May June. Day. .Tan. Feb. Mar. Apr. May June. 1914-15. 1 0.1 209 1,840 1,160 570 332 250 185 120 105 710 3,410 1,060 638 465 332 738 660 450 465 355 332 289 232 206 198 310 263 228 196 181 64 59 54 51 45 39 36 34 29 26 22 22 22 22 30 515 830 970 1,320 2,120 895 615 570 465 405 355 289 234 202 170 41 37 34 30 27 20 14 13 11 10 8 7 5 4 3 1914-15. 16 0.1 16** 1.9 1.0 .5 .2 .1 .1 ,090 >,0G0 500 289 334 380 310 480 530 380 269 215 465 289 232 198 167 142 lao 119 109 99 89 72 72 72 64 64 64 80 72 68 39 34 29 22 70 119 430 319 430 212 167 142 109 263 550 141 155 269 250 186 128 104 94 75 66 58 66 58 51 48 44 1 2 17 4 3 18 6 4 19 . . . 9 6 20 11 6 21 14 7 22 12 8 23 10 9 24 8 10 25 6 11 26 4 12 27 2 13 28 . 1 14 29 ] 30 i .1 15 .1 31 Day. Mar. Apr. May. Jiine. Day. Mar. Apr. May. June. 1915-16. 1 199 199 191 191 183 176 168 153 153 153 153 153 160 139 126 48 45 43 41 39 36 34 32 30 27 26 24 24 30 27 16 15 13 12 10 9 8 6 5 4 3 2 2 2 1.5 1915-16. 16 108 96 91 86 81 76 76 72 72 72 72 64 56 53 51 24 26 27 24 30 28 27 26 24 2i 24 24 22 21 19 18 . 1.5 2 17 1.5 3 18 . 1.0 4 19 1.0 5 20 1.0 6 21 .5 7 22 . . . -5 8 23 .. .5 9....... 24 .1 10 25 .1 11 26 .1 12 27... .05 13 .. 28 .05 14 29. .. .0 15 - 30. .. 215 199 .0 31 1 1 1 142131°— 21— wsp 447- 82 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of San Diego River near Santee, Calif., for 1912-1918 — Con, Day. Dec. Jan. Feb. Mar. . Apr. May. June. 1916-17. 1 89 155 116 98 80 65 72 80 72 136 50 48 47 59 126 116 116 147 218 308 267 104 107 98 94 89 89 84 80 72 68 65 59 53 50 44 42 42 40 37 42 40 42 4-2 42 42 37 89 158 142 126 116 147 980 374 280 254 218 194 170 116 84 80 80 80 80 89 116 89 89 80 94 89 84 80 59 59 59 59 65 59 50 53 50 53 50 42 42 44 47 47 42 40 33 33 33 31 37 76 59 50 50 44 37 430 340 194 102 112 89 80 65 65 62 53 47 50 53 53 50 44 42 40 37 33 30 27 40 42 33 29 27 22 19 17 16 29 44 32 27 24 24 22 56 47 40 42 40 37 35 33 2 20 3 19^ 4 17 5 . 1& 6 15 7 14 8 12 9 9.5 10 . . 7.5 11 6 12 4.8 13 4.0 14 3.2 15. . 3.0 18 2.8 17. . . 2.6 18 2.4 19 4.5; 3,5 2.5 2.5 2.5 5 147 136 107 107 107 107 107 2,2 20 2.0 21 1.8 22 1.6 23 1.4 24 1.2 25 1.0 26 .» 27 .5 28 .3 29 .2 30 .1 31 - - Day. Dec. Jan. Feb. Mar. Apr. May. Day. Dec. Jan. ■ Feb. i Mar. Apr. May. 1917-18. 1 0.2 .2 .2 .2 .2 .3 .3 .5 .2 .2 127 5,350 1,220 462 308 38 35 32 30 30 28 21 18 16 14 12 8 8 8 2 2 2 2 1 1 1 1.1 3 ] ] 1 2 a 3 1917-18. 6. 201 138 117 376 475 288 161 117 108 99 82 74 67 63 47 41 5 1 5 4 4 4 4 4 3 3 3 3 3 2 2 3 8 4 0.2 .2 9. 5 6. 1. 7 0.2 2 8 3 0.1 9. 4 10 5. ; 11. 6. i 12. 7 13 8. , I 14 9 1 15... 0. 1 ! 1 Note, — Daily discharge determined as follows: 1912-13: Dec. 29, 1912, to Jan. 27, 1913, estimated; Jan. 28 to Feb. 28 and Mar. 11 to Apr. 5, 1913, froH* fairly well-defined rating curves: Mar. 1-10 and Apr. 6-30, by shifting-control method. 1914: Jan. 1-26, estimated. Gage-height not recorded Feb. 6, 10-19, 25 to Mar. 1. Mar. 3-5, 7-15, 22, 25^ 27, and Apr. 6-8; discharge interpolated. Discharge for remainder of 1914 from well-defined rating curve. 1915: Jan. 1 to Feb. 2, from well-defined rating curve; Feb. 3 to June 30, from fairly well-defined rating curves. Gage height not recorded Jan. 24-28, Feb. 7 and 17, Mar. 24 and 31, Apr. 2, 7, 12-13, 15, 17, 20, May 30 to June 4. June 6, 7-15, 17-20, and 22-30; discharge interpolated. 1915-16: No record Oct. 1, 1915, to Mar. 29, 1916. Gage not read Apr. 29 to May 7, May 9, 11, 15, 17, 21, 23, 25, and May 28 to June 30; discharge interpolated. 1916-17: Gagenotread Dec. 22-24, 28, 30, 1916, Jan. 2, 4, 7, 12, and June 15-20, 1917; discharge interpolated. On days for which discharge is not pven, except for periods explained above, there was no flow except small quantity of ground water rising to surface just above dam. SAF DIEGO EIVEE BASIISf, 83 Monthly discharge of San Diego River near SavJee, Calif., for 1912-1918. Month. Discharge in second- feet. Run-Off (total in Month. Discharge in second- feet. Run-oflf (total Maxi- mum. Mini- mum. Mean. acre- feet). Maxi- muin. Mini- inum. ilean. m acre- feet). 1912-13. October 0.05 .1 .2 1.72 3.75 17.2 5.64 .05 .05 .05 .05 .05 3 6 12 106 208 1,060 336 3 3 3 3 3 191.5-16. March 30-31 April 215 199 48 16 199 51 18 .0 207 121 28.8 3. .88 821 7,200 December May 1,770 January 26 26 46 28 0.2 .1 3 .1 June 231 February March The period-. 10,000 April 1916-17. ' December 19-31.. January . . May 147 30& 980 170 430 56 33 47 37 42 31 16 .1 64. o 111 136 74.7 81.8 33.8 6.8:5 June July 1, 669 August .. September March . .'. 4,.590 1,750 April . 4,870 : May Jmie The period... 2, 080 1913-14. 930 2,300 .1 .1 1.5 49.5 175 23 3,040 9,720 1,410 405 January 28, 0(10 February March 1917-18. December. . " .1 «.2 ffl.2 320 12.1 14,200 &. 1 January ' 2,060 3,410 738 550 2,120 41 0.1 105 64 22 44 .1 118 563 212 116 379 11. 7 7,260 31, 300 13,000 6,900 23,300 C96 il. 1 1914-15. January March April 5,350 38 .2 2 19,700 72a Februaiy March May 43.0 The year,... April 5,350 .0 28.3 20, 500 May.. June The year , . . 82,500 SAF BIEGO RIVER AT SAN DIEGO, CALIF. Location. — At highway bridge in Block 3&1, Old Town subdivision, city of San Diego San Diego County, about 1^ miles above mouth. Station has also been maintained at Murray Canyon ford, in Ex Mission San Diego grant, al>out 3| miles north of San Diego and 2| miles al)ove station at highway bridge. Drainage. — 434 square miles: 431 squai'e miles at Murray Canyon ford (measured on topographic maps). Elevation. — Sea level. Records available. — October 1, 1912, to December 19, 1914; January 1-31, 1916. At Murray Canyon ford, December 20, 1914, to September 30, 1915. Gage. — Staff on left bank at highway bridge. At Murray Canyon ford staff was in two sections just above ford; lower section in center of channel ; upper section on left bank. Gages not at same datum. Discharge measurements. — Made from liighway bridge at Old To-wn or by wading. When measurements were made from bridge, during 1914-15, frequent readings were also made at Murray Canyon gage. Channel and control. — Sand; shifting. The concrete driveway built across channel at Murray Canyon served as a part control but results were not A-er;.- satisfactory as sand collected on the concrete. Extremes of discharge. — 1912-1916: Maximum stage recorded, 19.3 feet (gage at highway bridge) January 27, 1916 (discharge, 75,000 second-feet); no flow for several months each year. 84 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Diversions. — See San Diego River near Santee. Water is pumped fi om gravels in Mission Valley above station. Record at this station shows quantity of water wasted into Pacific Ocean. Regulation. — None except as noted for station at Lakeside. Accuracy. — Stage-discharge relation not permanent. Rating curves usually well defined except for flood stages. Gages usually read to hundreths twice daily ; read frequently during floods. Daily discharge ascertained by applying mean daily gage height to rating table or by shifting-control method; for January, 1916, taken from a hydrograph drawn through discharge measurements and conform- ing in general shape with that determined for San Luis Rey River at Oceanside. Records fair. Discharge measurements of San Diego River at San Diego, Calif., for 1913-1916, 1913. Mar. 14 Apr. 8 14 1914. Jan. 27 29 31 Feb. 2 3 7 17 19 20 Mar. 5 8 19 27 28 1915. Jan. 29 29 30 Feb, 2 9 Mar. 9 Made by— F. C. Ebert Feet, W.S.Post 6.44 E. W.Case - ....do F.C. Ebert 6.64 6.25 6.01 W. S. Post 7.56 F C Ebert 7.40 W. E. Keenan 6.76 F.C. Ebert 6.46 W. E. Keenan 6.36 ....do ....do Raylor and McFadden . Hickok and Keenan. . . . W. E. Keenan . 6.18 6.13 6.58 9.15 6.67 .-..do ....do F C. Ebert 6.56 6.25 6.15 W.E. Keenan 6.20 Lee and McFadden . ....do W.D. McFadden... Keenan and Armstrong F.C. Ebert ....do Gage height. 9.74 11.25 10.35 2.34 3.02 Sec.-ft, 1.1 .05 U4 30 18 688 54 37 9.7 2.4 4.2 1.3 574 955 2,380 1,690 107 250 1915. Apr. 3 19 May 5 20 June 2 21 Aug. 1 1916. Jan. 17 17 18 19 20 21 22 28 29 Feb. 5 Mar. 18 29 Apr. 3 17 22 May 10 June 8 Nov. 7 Dec. 30 Nov. 7 Dec. 30 Made by — Ebert and Keenan V/. D. McFadden Isbell and McFadden. . F.C. Ebert D.L.Lee McClung and Ellis F.C. Ebert.. R.H.Day... do , -do. Ellis and McFadden . do W. D. McFadden.... -do. Ellis and Day R.W.Day.. W.D. McFadden McGlashanand Ebert. T.P.ElUs R.W.Day do .do. McClung and Culver . do R.W.Day W. D. McFadden... - R.W.Day W.D. McFadden.... Gage height. Feet. 2.38 L92 9.71 2.90 2.42 L90 13. 55 13.45 13.34 12.1 9.1 7.8 7.1 9.9 9.98 9.5 9.55 9.64 9.38 9.14 8.37 i.l9 Dis- charge. Sec.-Jt. 55 17 1,130 187 65 a 10, 400 a 10, 100 a 7, 380 a 8, 650 a 2, 180 1,820 1,270 11,100 6,560 1,100 190 305 232 104 102 29 .07 14 14 a Float measurement. Daily discharge, in second-feet, of San Diego River at San Diego, Calif, for 1912-1916 Day. Mar. Apr. Day. Mar. Apr. Day. Mar. Apr. 1912-13. 1 4 5 4 2 .4 .4 30 1912-13. 8. .. . 0.05 .05 .05 .05 .05 .05 .05 1912-13. 15 0.05 2 9 26 2 11 18 16 5 2 3 10 4 11 27 5 28 12 29 6 13 30 7 14 31 SAN DIEGO KIVER BASIN. 85 Daily discharge, in second-feet, of San Diego River at San Diego, Calif, for 1912-1916— Continued. Day. Jan. Feb. Mar. Apr. May. Day. Jan. Feb. Mar. Apr. May. 1913-14. 1 . ... 22 12 7 4 2 1 1 1 82 75 62 62 55 49 43 38 32 27 22 22 18 18 13 20 18 13 13 9 6 3 3 1 22 1913-14. 16 5 710 1,820 1,350 422 234 222 186 124 90 13 9 13 13 13 13 9 9 6 6 6 6 6 13 18 22 2 17 3 18 4 19 5 20 6 21 7 22 8 23 9 24 10 25 11 26 12 : 27 237 820 188 105 34 13 28 .... 14... 29 15 30 31 Day. Jan. Feb. Mar. Apr. May. June. Day. Jan. Feb. Mar. Apr. May. June. 1914^15. 1 390 1,310 2,120 1,110 635 400 315 160 100 590 2,480 1,940 1,200 780 465 425 740 640 465 425 310 310 280 245 235 220 210 195 185 170 55 45 40 38 35 40 37 38 40 37 27 20 15 16 16 385 530 425 555 1,160 885 780 535 468 400 302 285 250 215 215 74 74 74 70 63 55 53 53 42 36 34 28 25 22 16 1914-15. 16 405 385 365 345 310 740 485 310 260 345 385 245 245 155 145 130 120 100 90 85 80 75 70 65 60 55 65 60 60 17 23 26 15 8 5 100 215 215 185 165 120 110 110 170 200 165 215 250 178 165 160 160 148 135 125 118 110 103 90 74 12 2... 17 10 3 18 2 4 19 15 5 20 1 6 21 .7 7 22 .6 8 23 .4 9... 24 ... .3 10 25 .2 11... 26 .1 12 27 .1 13 28 ... .1 14 29 780 2,240 15 30 31 . 1 om r""' Day. Jan. Day. Jan. Day. Day. 1915-16. 1 11 12 13 14 15 16 17 18 19 20 1915-16. 21. 22. ?3 1915-16 1,760 2 1,310 3 1,380 1,260 4 2 9 4 5 ^ 1,280 6 26. 27. 28. 29. 30. •^1 3,000 38,000 13,200 7 13 40 8 12, 700 7,320 2,550 9 5,980 10 2,750 1.280 Note.— Daily discharge determined as follows: 1913: Mar. 26 to Apr. 15, from well-defined rating curve. 1914, 1915: Jan. 28 to May 2, from fairly well defined rating curves. Jan. 29 to June 28, from fairly well defined rating curves and Dy shifting-control method. 1914-15 from four well-defined rating curves appli- cable for short periods and by shifting-control method. 1916: Water began flowing early in morning Jan. 17; crest of first flood at midnight Jan. 17; crest of second flood at 7 p. m Jan. 27; concrete highway bridge failed at 2.20 p. m. Jan. 27 Stream dry for days for which discharge is not given except May 3 to 8 and 10 to 14, 1914, for which no record was reported. 86 SURFACE WATER OE PACIFIC SLOPE^ SOUTHERInT CALIFORj^IA. Monthly discharge of San Diego River at Sa7i Diego, Calif ., for 1912-191(1. Month. Discharge in second- feet). Run-ofi (total in acre- feet). Month. Discharge in seeond- feet. Ru-u-otf (total ta Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum , Mean. ■ acre- . feet). 1912-13. Marcli 18 30 1.7 1.54 105 92 1914-15. January.. February Marcli April May 2,240 2,480 740 215 1,160 74 100 74 136 672 209 66.1 316 25.4 8 380 April 37' 300 12,900 3, 930 19,400 1 510 The year.... 30 .27 197 1913-14. 820 1,820 82 20 6 44-6 186 25.6 2.9 2, 740 10, 300 1,570 173 June.::::::;:;::: The year 1915-18. January.. February March 2,480 1 115 83,400 75,000 3,460 May 213,000: The period... 1, 820 23,6 14, 800 BOTTLDEE CHEEK NEAR JULIAN^ CALIF. Location. — In Cuyamaca gi'ant,. at outlet of Cuyamaca re&ervoir, 7 miles south of Julian, San Diego County, and 12 miles above mouth of Boulder ('reek. Drainage area. — 12.0 square miles (measured on topographie maps). Elevation. — About 4,650 feet above sea level. Records available. — June 19, 1912, to September 30, 1918. Gage.: — Vertical staff fastened on right side of weir I30X, 3^ feet above weir. Zero at elevation of crest of the 6-foot Cippoletti weir wMch is 100 feet below outlet gates of reservoir. Read daily by an employee of the Cuyamaca Water Co. Discharge measurements. — Made by wading near weir. On account of velocity of approach it has been necessary to rate weir. Channel and control. — Cippoletti weir acts as permanent control. Extremes op discharob. — 1912-1918: Maximum stage not knov/n; maximum mean daily discharge recorded occurred January 28, 1016 (discharge, 1,877 second- feet); no water is released from, the reservoir except when needed for Cuyamaca Water Co.'s flume. Diversions. — None. Regulation. — Flow completely regulated ])y operation of outlet gate of reservoir. Cuyamaca dam, completed in 1886, was one of the first earth dams built in Cali- fornia to store water for irrigation. The dam was originalh' 35 feet high but in 1894 was enlarged, increasing the capacity of the reser^'^oir to 11,400 acre-feet. The present dam is 635 feet long and 41-| feet high, with an inner slope of 2:1 and an outer slope of 1|-:1. From the reservoir the water flows 12| miles down the natural channel of Boulder Creek and San Diego River to the intake of Cuyamaca Water Co.'s flume. Accuracy. — Stage-discharge relation permanent except when changes are made in weir. Rating curves well defined. Gage read to hundredths daily with addi- tional observations when reservoir gates are changed. Daily discharge ascer- tained by applying mean daily gage height to rating table. Record excellent when discharge does not exceed capacity of weir. Cooperation, — Records of daily discharge for 1916, 19-17, and 1918 furnished by Cuyamaca Water Co., Ed. Fletcher, manager. SAN DIEGO EIVEK BASIN. 87 Discharge measurements of Boulder Creek at Cuyamaea reservoir, near Julian, Calif. ^ for 1912-1915. 1912. July 25 25 26 26 1914. Aug. 21 Sept. 10 Oct. 11 Made by— E. W. Case. do .-..do ....do F. C. Ebert ....do ....do Gage height. Feet. 0.58 .40 .22 Dis- charge. 5.5 2-. 2 3.0' 1914. NOA". 4 1917. June 28 W. J. Isbell... --.-do. F.C. Ebert.... --..do-. !>. A. McChmg. (rage height. Feet. .71 .32 .43 .35 Daily discharge, in second-feet, of Boulder Creek oi Cuyamaea reservoir, near Julian, Calif., for 1912-1918. Day. June. July. Aug. Sept. Da V. June. July. Aug. Sept. 1912. 1 7.5 7.5 7.5 6.6 5.5 7.5 9.5 5.5 7.5 7.5 8.5 9.5 9.5 9.5 9.5 7.5 12 12 12 12 12 12 12 12 12 12 .0 9.5 9.5 9.5 7.5 7. 5 5.5: 5.5 3.7 3.7 3.7 3.7 5.5 3.7 3.7 4.6 5.5 6.6 5,5 16. 17. IS 1912, 11 12 9.5 11 12 12 12 12 12 8.0 12 12 12 .12 7.5 7.5 9.2 9.5 9.0 9.5 7.8 5.5 5.5 5.5 12 12 .0 .0 1.3 3.7 3.7 4.6 4.6 2 4 6 3 5.5 4 19. 20. 21. 22. 24. 25. 26. 27. 28. 29. 30. 31. 4.6 5.9 5.9 9.5 9.5 9.5 7.8 7.5 9.5 9.5 9.5 3.7 4 6 5 .,... 4.6 6 4.6 7 4.6 8 ... . 4 6 9 4.6 10 4 6 11 4.6 12 ... . 4 6 13 4.6 14 3.7 15 3 7 Day. Oct. Nov. Dec. Jan. May. June. July. Aug. Sept. 1912-13. 1 3.7 .0 .0 .0 .0 .0 .0 .0 2.1 4.6 6.6 6.6 5.5 5.5 5.5 5.5 5.5 3.7 3.7 3.7 3.7 3.7 3.7 3.7 4.1 4.1 4.1 4.1 2-4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 O.C .0 .8 is .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 .8 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 0.0 .0 .0 .0 .0 .0 :S .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .8 .8 .8 •8 .8 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 2.1 2.8 2.8 2.8 2.8 6.8 6.8 6.8 6.S 8.5 8.5 8.5 9.5 10.6 10.6 12 12 12 12 5.5 5.5 7.0 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 10.6 10.6 10.6 10.6 10.6 10.8 10.6 10. 6 10. 6 10. 6 10.6 10.6 10.6 10.6 sis 5.5 5.5 5.5 5.5 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 6.6 7.5 7.5 5.9 5.9 5.9 5.9 5.9 5.9 5.9 5.9 5.9 5.9 5.9 2.4 2 2 4 3 2.4 4 5.5 5 2.4 6 2.4 7 8 8 8.0 9 8.0 10 3 7 11 7.5 12 . 7 5 13..... 7.5 14 7.5 15 „ . 7.5 16.... 7.5 17 6 5 18 5.5 19 5.5 20 .... 5 5 21 5.5 22 6 5 23. . . 5 5 24 5 5 25 5 5 26 5 5 27 5 5 28 29. 5 5 5 5 30 31 88 SURFACE WATER OF PACIFIC SLOPE, SOUTHERl^ CALIFORInTIA. Daily discharge, in second-feet, of Boulder CreeTc at Cuvamaca reservoir, near Julian, Calif for 19n-1918—Gontmued. Day. Oct. Nov. •Tuly. Aug. Sept. Day. Oct. Nov. July. Aug. Sept. 1913-14, 1 4.2 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 4.2 4.2 2.2 2.2 2 2 2.8 4.2 4.2 4.2 .6 .6 .6 .6 .6 1.6 1.6 1.6 .6 .4 .4 .4 .4 0.4 .4 .4 .4 .3 :::::: 0.0 .0 .0 .0 .0 .0 .0 1.0 6.0 6.0 6.0 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 3.4 3.4 3.4 3.4 3.4 3.4 3.4 5.2 5.2 7.8 0.0 .0 8.3 8.3 8.3 8.3 8.3 5.6 3.6 3.6 .5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6 .5.6 5.6 5.6 5.8 3.6 3.6 3.6 3.6 3.6 3.6 3.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6 3.6 3.6 3.6 3.6 2.3 2.3 2.3 2.3 2.3 2.3 2.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.3 1 1 1 1 1 1 1 1 1 1 S 1914-15. 1 2.3 1.4 .0 .0 .0 .0 .0 .0 .0 .0 2.5 3.3 3.0 2.3 3.0 3.0 3.0 3.0 2.5 2.0 1.1 .7 .7 1.7 2.0 2.0 2.6 3.3 3.3 3.3 3.3 3.3 3.3 6.2 7.4 1.2 1.0 1.0 1.0 .3 3.1 3.6 4.2 5.6 7.0 8.3 8.3 8.3 8.3 9.4 11 11 7.9 7.8 7.8 6.7 5.3 5.2 5.2 6.5 8.3 8.3 7.2 6.8 5.6 6.8 5.8 6.6 5.6 5.6 6.5 7 8 2 7 8 3 3 . . 7 8 4 4 6 8 5 5 5 6 6 6 5.6 5 6 7 7 8 8 5 6 9 9 5 6 10 ... 7 6 11 1 8 5 12 2 8 6 13 3 8 6 14 4 7.2 15 5 5 4 16 6 4 2 17 7 4 2 18 8 4.2 19 9 5 4 20.. . 21 28 30 52 92 12 36 49 67 67 58 40 5 4 21 1 7 7 22 2 7 6 23 3 7.6 24 4 7 6 25 5 7.6 26 ... 6 6 & 27 7 ... 6.5 28 8 6.5 29 9 5 6 30 5.& 31 1 Day. Oct. Nov. Dec. Jan. Feb. Mar. Aug. Sept. 1 1915-16. 5.6 6.7 6.7 6.7 6.7 6.7 7.8 7.8 7.8 7.8 7.8 6.7 6.7 6.7 6.7 7.3 7.4 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 2.7 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 4.6 4.6 4.6 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 3.3 .8 329 325 323 240 40 40 40 40 40 40 40 40 30 1,5 3.0 5.2 3.0 3.0 3.0 3.0 3.0 1.9 1.9 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 2 3.Q 3 .... 3 4 3 5 5 4. 1 6 4 1 7 4.1 8 . 4.1 4 1 4.1 11 4 1 12 4 1 13 4.1 14 4.1 15 ... 4 1 16 4.1 17 7.8 18 33 106 106 66 5.5 5.5 5.5 21 5.5 22 ,. 5.5 23 17 30 30 30 27 5.5 24 5.5 25 11 23 820 1,880 815 550 345 5.5 5.5 27 5.5 28 5.5 3 4.5 2.5 31 1 SAN DIEGO RIVER BASIN, 89 Daily discharge, in seco\ , of Boulder Creek at Cuyamaca reservoir, near Julian, Calif., for 1912-1918— Continued, Day. Oct. June. July. Aug. Sept. Day. Oct. June. July. Aug. Sept. 1916-17. 1 2.5 .9 6.9 6.9 6.9 6.9 6.9 6.9 7.5 8.3 8.3 9.3 9.9 8.6 8.5 8.6 7.2 9.1 9.1 9.1 9.1 8.G 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 7.8 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 1916-17. 5 7.2 7.2 7.2 7.2 7.7 9.1 9.1 9.1 9.1 9.1 7.8 7.8 7.8 7.8 7.8 8.2 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 • 8.9 8.9 8.9 2 7 8.9 3 8 8.9 4 9 8.9 5 8.9 6 1 8.9 7 2 8.9 8 3 8.9 9 .... 4 ' 8.9 10 5 8.9 11 . 8 2.8 9.1 8.9 12 7 ... 2.8 9.1 4.4 1 9.1 5.0 i 9.1 6.9 9.1 8.9 13 • 8 8.9 14 9 8.9 15 8.9 1 9.1 1 Day. Oct. Nov. Dec. Jan. Feb. May. June. July. Aug. Sept. 1917-18. 1 .. 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 4.4 6.9 3.0 5.3 2.6 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 9.4 4.3 4.3 4.3 4.3 4.3 2.7 2.7 2.7 2.7 2.7 2.5 1.8 1.8 1.8 1.8 1.8 1.8 1.0 7.2 7.2 11.4 11.4 11.4 11.4 11.4 11.4 11.4 11.4 11.4 11.4 8.9 8.9 off (total in acre- feet). Month. Discharge in second- feet. Rtm-o3 (total in Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1912. Jime 19-30. 9.5 12 12 3.7 3.7 7.70 &.45 S.24 4. 80 183 581 507 286 1915-16. October 7 8 6.G 3.3 1, 880 329 40 5.2 7.- 8 5.6 .0 .0 .0 .0 .0 1.1 1.9 6.57 404 Julv..-. August NoA'cmber December January . . . 2. 06 123 .22 14 SeutemlDer- . 153 9,410 42.1 I 2-, 420 15. 6 ! 9.59 February March 1912-13. October 6. () 2.4 2.1 2. I i.3 10. r. .0 2.4 .0 .0 .0 l.'i 5.5 5. 9 2.4 3.21 2.40 87 .57 .34 6.37 ti. 41 197 143. 53 35 21 379 536 394 331 Noveiul;er .... December September The year... 1916-17. 4. .33 ; 270 1,880 .& Mav 18.9 iia, 700' June 2.5 6.9 9.9 9.1 8.9 .0 .0 6.9 7.8 8.9 July .11 .73 8.20 8.36 S.90 6.8 Aiigutfi SepteinbeF.- June - Julv 43.4 504 August September The year. . . 1917-18. October November : December Januarv Fel)riiarv ■ Mav Tfeeyeiu-- . 12 .0 2.89 2, 090 514 630^ 1933-14. .; 2 8^3 5.6 .4 .0 .0 .0 2.3 1.R5 .06 4.48 5.09 3.57 114 313 212 9.9 .0 2.21 1,600 November Julv 8.9 9.4 2.3 2.7 24 4.7 1L6 11.6 11.6 2.6 .0 .0 .0 .0 .0 .0 7.2 11.6 7.5 6.10 3.14 .61 August September 375 187 37.5 The year. . . S.3 .0 1.27 918 . 90 : 55. 3 11.9 ! 661 .90 i 55.3 lObl-lo. 3.3 7.4 12 11 X. 6 .0 .0 .0 3.1 4.2 1.78 .82 2.13 6.86 ti.54 109 49 131 422 389 NoYenit)er 5. 43 323 Julv 10. 6 ! 652 July 11.6 I 713 September The year... September The year... 12 .0 1.52 1,100 24 .0 4. 96 3, 590 Note.— No. water relea.sed from Cuyamaca reservoir in months for which dischargs is not shown. The totals therefore represent records for full year. BOTJLDKR CItEEK AT MOUTH, KEAR LAKESIDE, CALIF, Location. — In NW. i sec. 12, T. 14 S., R. 2 E., just above junction with San Diego River, about 14 miles northeast of Lakeside, San Diego County. Drainage area. — .33.5 square miles (measured on topographic maps). Elevation. — A]:)Out 800 feet above sea level. Rkcords avail.\_ble. — August 12, 1912, to January 26, 1916. Gage. — Vertical staff, installed March 1, 1914, on right wing wall of weir box, 300 feet above mouth of creek, at same datum as gage destroyed by flood in January, 1914. When the station was e.stablished a weir without end contractions, was installed. The g&ge, which was fastened to left side of box. was at same elevation as crest of weir. Weir board was removed Novem.ber 9. 1&12, and gage readings were obtained Ijy measurLcg from a reference point until January 22, 1913., when a vertical stall' was installed on left bank in pool above weir box; datum, 2.0 feet below original gage. Discharge measurements. — Made from foot plank over f],ume or by wading. Channel and control, — ^Sand, gravel, and boulders; fairly permanent. The weir box acts as a control. Both banks are fairly high and not likely to l>e overflowed. Extremes op discharge. — 1912-1916: Maximum stage recorded, 7.00 feet January 18, l!il6 (discharge, 345 second-feet); no flow July 2 to 8. 1914. Diversions. — None. Regui-ation. — Water is stored at Cuyamaca reservoir and released during low- water period. See Boulder Creek near Julian. Accuracy. — Stage-discharge relation fairly permanent. Rating curves well defined below 80 second-feet. Gage read to hundredths twice daily. Daily dis- charge ascertained by applying mean daily gage height to rating table. Records good for medium and low stages; high- water records fair. SAK DIEGO EIVEH BASIN. ^ 91 J>i:sckarg-e measnremenrs of Boulder Crech at mouth, near Laliesi>^:e . f'aMf.,for 191S-J9t5. Date.. im2. Aus. 16 Oct. 2 ms. ! Jan. 12 16 22 h>l>, 1H 2f> Mn,r. i.^ M:ay 13 1914. 1 Jan. 20 28 Apr. 20 Mav 12 1H Get. 17 Made by— F. C. Ebert. do W. -do. . Post. F. C. Ebert. ....do E. W.Case.. F.C. Ebert. do F.C. Ebert do .-..do-.- W. D. MeFo,dden.. F.C. Ebert do Gage Dis- h eight, charge. Fret. 0i53 1.40 .93 1.17 2. 50 1.03 1.20 1.17 1. 01 Sec-it. 7.3 3.4 IZ 1.^ 2.5 5.. 4 1915. Feb. ;; Gaga Dis- h-eight, eharg^. F.C. Ebert.. d0- Day and Muadiiv McCliin^ and Harritt. . do Id I 23 30 July 10 Sept. 24 Doc. 8 D. A, McChmg.. F.C. Ebert..:.. do ....do Feet. 2. S3 3.60 2. 50 2.05 >. S2 i.ti2 1. 1^ i.38 1. 25 1. 1.5 1.32 LOS Scc.-fl. ».r> 27 10 S.9 G. 1 4.6 6.1 2.2 J)mh/ discharge, in second-feet, of Boulder Creek at m.&ath, itr,ir Laheslde, f'alif., for 191:2- 1916. Day. Aug. Sept. Day. Aug. Sept. Day. •Aug. Sept. 1 1912. 4.1 5^6 5.5 3.6 4. 3.8 4.3 4.3 4.7 11.. 12. 13 1912. 4.1 4.7 4.3 5. 1 4.7 5.1 4.1 4.1 I.l 3.4 21.. 1912. 4.3 4.7 9.1 9. 3 i;3 4.0 1.3 3.8 4.1 2 2.S 7.3 7.3 7.1 7.1 8.1 8.1 8.4 22 .. 3.8 3^ 23 3 9^ 4 . ... 14.. 15 21 4.0 5. 2:5.. 26 . . '>7 4 3 6 , . IC. 17. 18. 39 4. ft 7 3 8 8 . , 28 3.S 9- 29 3 * 10 20. 30. 31. 3.1 Day. Oct. Nov. Dec. Jau. Fob. M;ar. Apr. May. .Tune. July. A us. Sept. 1912-13. 1 3.1 3.1 3.4 8.6 7.5 7.9 3.4 2.2 1.8 1.7 1.5 1.9 4.1 6.4 4.7 .5.1 5. 1 .5.2 6.4 5.2 5.1 5.2 5.1 4.7 5.1 5.2 5.1 5.2 5.2 4.7 4.7 4.1 3.1 3.6 4.3 4.0 4.0 4.0 3.3 2.8 3.2 4.0 ■ 4.2 4.0 3.0 3.2 2.9 2.8 2.7 2.8 2.8 2.8 2.6 2.3 2.7 2.7 2.8 2.6 2.6 2.6 2.8 5.3 3.1 2.6 2.6 3.0 2. -6 2.6 2.5 2.5 2.4 2.5 2.5 2. 5 2.4 2.0 2.4 2.4 2.6 2.4 2.4 2.5 2.2 2.4 2.5 2.4 2.3 2.1 2.2 2.1 2.0 2.0 2.9 3.2 2.9 2.9 2.8 2.8 2.9 3.2 2.8 2.6 2.3 2.3 12 11 9.5 .5.6 4.4 4.0 3.0 3.0 2.5 2.5 2.5 2.6 2.7 2.6 2.6 2.6 2.6 2.6 2.5 2.5 2.5 2.9 2.9 3.8 4.0 3.2 2.8 2.9 2.9 2.9 2.0 2.3 2.3 2.2 2.2 2.4 2.9 26 \6 4.0 26 20 18 12.5 13. 5 8.6 11 14 11 16 14 16 12 10 14 14 14 12. 5 11 8.6 8.0 8.0 S. 6 11 9. 5 IS 17 14 15 13 11 11 11 11 9.5 11 n 10.5 8.6 8.0 8.0 7.4 6.2 6. 5 .5.0 5!o 6.5 .5.3 .5.0 4.6 5.0 4.6 4.0 4.2 4.0 3.0 3.0 3.4 3.0 3.0 3.0 3.0 3.0 3.0 2.9 2.9 2.9 2.9 2. 9 2.9 2! 4 1.8 2.0 1,7 1.6 1.6 1.6 1.6 1. S 1. 7 2.5 2.0 2.0 2.0 2.3 2.5 2.5 2.8 2.8 2.7 2. 7 i'.2 3.2 3.4 4.8 4.8 5. G 6.2 6. 5 0. 5 7^1 6. 5 e! 5 9. -^ 8.0 s.o S. 8.9 6!2 5.0 -' 8 -1. ^ 6!2 6.5 5.6 6. 2 S.O 7.4 7.4 7. 1 8.0 8.0 S. .'. l1 4.4 4.0 4. ".0 3.0 5. .">. 3.0 3,0 3.0 3.0 3. 4. 4 ;-;. 3.4 3.4 3.2 3. 2 3.2 3.2 3.2 4. (\ 3, •> 3 S 3.6 3.6 4.0 4. 3.6 4.4 6.5 4.0 2.5 2 -'.2 3.. 4 „ 2.1 2I0 6 2.0 4.2 S 4.4 9 4.4 10.. 11 2.5 1.8 12 4.2 13 4.6 14 15. 4.6 4,6 16 3.4 17.. 18 3.0 2.9 19 3 20. 3 21 3.0 22.. 23. 3.0 3 2 24 4.0 25 3.8 26. 3 5 27 3.3 28 3 29 3.0 30 3.0 31 92 SUKFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Boulder Creek at mouth, near Lakeside, Calif ., for 19 12- i9-? 6— Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1913-14. 1 3.2 3.6 2.4 2.6 2.1 2.0 1.8 1.6 2.0 3.4 2.6 2.3 2.2 2.3 3.2 3.4 3.2 3.0 2.9 2.0 . 1.7 1.5 1.6 1.7 1.8 1.8 1.4 1.3 1.5 1.4 1.4 3.0 3.2 4.2 3.5 1.8 1.0 1.5 1.5 1.5 1.4 1.5 2.0 2.2 2.2 2.4 2.5 2.5 1.5 1.5 1.8 1.6 2.0 1.5 1.2 1.2 1.1 1.0 1.5 2.1 2.3 3.4 1.4 1.5 1.6 1.8 1.6 1.5 1.5 1.4 1.3 1.1 1.1 1.1 11.0 2.3 1.8 1.8 1.7 1.6 1.9 3.0 2.8 2.2 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 3.3 3.3 .3.3 3.4 7.8 3.3 2.4 2.2 2.0 11 2.1 2.1 2.0 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.4 1.4 1.4 1.5 1.5 1.5 1.6 1.6 1.6 1.7 2.0 1.9 1.8 1.8 1.8 1.8 ' 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.7 1 8 1.8 1.8 1.8 1.9 2.0 5.0 3.4 2.7 3.2 2.0 2.5 2.5 2.2 2.5 1.7 1.7 2.0 1.5 1.5 1.6 1.6 1.6 1.7 1.7 1.7 3.1 3.0 2.7 2.9 2.2 2.3 8.0 4.2 4.1 3.8 3.2 3.1 3.5 3.1 2.9 2.8 2.5 2.8 2.7 2.7 2.7 2.5 2.3 2.2 2.0 2.0 2.0 2.0 2.0 2.0 1.8 1.8 1.8 1.8 1.8 2.5 .5.0 4.0 11.0 ■ .5.0 3.4 3.0 2.8 11 5.6 83 29 12 10.5 8.6 7.4 7.1 6.5 6.5 5.9 5.3 4.8 4.8 4.4 4.2 4.2 4.0 4.0 3.8 3.4 3.6 3.2 3.4 3.0 3.0 3.4 3.2 3.4 3.8 3.8 3.4 4.0 3.6 46 46 48 . 42 49 38 36 34 30 30 34 28 25 24 21 20 19 18 14 16 15 15 13 13 12 12 12 12 16 13 12 3.6 3.4 3.4 3.4 3.4 3.6 3.4 3.4 3.2 3.2 3.4 3.4 3.2 2 9 2.9 2.9 2.8 2.7 2.7 2.6 2.5 4.6 18 9.5 4.6 4.2 4.2 3.8 4.8 19.5 11 10 10 9.0 9.4 10 9.8 7.4 9.0 8.4 8.0 8.0 7.8 8.6 11 9.4 8.4 8.2 7.8 7.4 13 40 40 56 34 28 25 24 28 76 14.5 17 10.5 10.5 7.4 0.9 5.9 4.6 4.0 4.0 4.0 3.8 4.4 4.4 4.4 4.2 4.2 3; 8 3.8 3.8 3.6 3.2 3.2 3.2 3.2 3.2 3 2 3.0 3.0 2.8 2.8 61 76 71 81 190 152 134 116 104 92 76 68 . 61 54 46 42 40 46 44 40 36 32 30 28 26 26 24 23 22 22 21 2.6 2.6 2.6 2.6 2.6 2.4 2.4 3.6 3.6 3.0 2.4 2.4 2.0 1.9 1.9 1.8 1.8 1.8 1.8 1.8 1.6 1.6 1.6 1.5 1.5 1.4 1.3 1.3 1.2 1.1 21 19 20 19 18 16 15 15 13 12 12 12 12 11 9.8 9.6 9.0 8.6 8.6 8.2 8.2 8.0 7.8 7.4 7.2 7.2 7.0 6.8 6.0 6.2 1.0 .0 .0 .0 .0 .0 .0 .0 1.0 2.0 2.0 2.8 8.0 4.2 3.0 6.5 .5.6 6.2 5.9 5.9 .5.6 2.8 2.3 2.3 2.3 2.3 2.2 2.2 2.3 2.8 4.6 6.0 .5.6 5.4 5.4 .5.0 4.7 4.6 4.4 4.4 4.4 4.1 4.1 3.8 3.8 3.8 3.5 3.4 3.2 3.1 3.1 3.3 4.4 5.4 5.8 17 6.0 5.0 7.4 7.6 8.0 6.8 8.0 1.8 1.8 4.6 5.6 5.6 5.6 4.2 2.9 2.5 2.4 2.3 2.9 2.9 2.9 3.0 2.9 2.3 2.9 2.9 2.9 3.0 2.3 2.5 2.5 1.6 1.0 1.0 1.1 1.9 2.0 5.2 4.8 5.0 5.8 6.2 7.8 7.8 8.0 7.8 7.6 9.4 9.4 9.0 7.6 7.6 7.4 7.0 5.4 5.4 4.7 5.8 7.0 7.0 7.2 5.8 5.8 4.8 6.2 5.4 .5.0 6.2 2.2 2.3 2.2 2,1 2.1 2 2 2.. ... . 3 4 5 6 7 1.9 2.7 2.3 2.3 1 9 8 9 10 11 12 1.4 13 1.6 1.6 1 9 14 1,5 16 1 6 17 1 6 18 1 8 19 20 • 1.9 2 21. . 2 22 2.1 23 2.0 24 2 25 2.0 26 2 27 2.3 28 2 2 29 2.1 30 2.1 31 1914-15. 1 2.7 2.3 2.3 2.3 2.5 2.5 2.5 2.6 2.6 3.0 2.6 2.6 2.5 2.5 2.6 2.6 2.5 2.4 2.3 2.3 2.2 6.8 6.4 4.2 4.4 5.0 3.6 4.1 68 116 44 40 92 86 38 46 19 14 12 10 76 183 110 22 42 32 30 34 26 22 34 42 32 28 26 42 32 26 23 7.8 2 8.4 3 9 4 4.. 9 6 5 7.4 6 7.4 7.4 8. 7.4 9 7 2 10 7.8 11 8.2 12. 8.2 13 8.2 14 8.2 15 7.8 16 7.0 17 . . 4.7 18 4.7 19 5.0 20.. 5.0 21 5.8 22 7.0 23 6.6 24 7.0 25 7.4 26 7.4 27 6.6 28 6.6 29 6.6 30 5.4 31 SAN DIEGO RIVER BASIIT. 93 Daily discharge, in second-feet, of Boulder Creeh at mouth, near Laheside, Calif ., for 19 12- 1916— Continued. . Day. Oct. Nov. Dec. Jan. Day. Oct. Nov. Dec. Jan. 1915-16. 1 4.4 4.8 5.0 5.0 4.8 5.0 5.5 6.0 6.0 6.5 7.0 6.5 5.5 5.0 5.5 4.8 4.8 5.0 5.0 5.0 6.0 5.5 2.3 2.3 3.6 2.1 2.4 1.9 1.5 1.5 2.5 2.5 2.8 7.0 9.0 3.8 3.2 2.5 2.1 2.*1 2.1 2.0 2.0 3.7 9.0 3.1 3.2 4.8 3.8 4.4 6.0 5.5 4.2 4.4 7.5 22 12' 9.0 7.5 36 1915-16. 16 5.5 6.5 4.8 4.6 4.4 1.5 1.4 4.0 4.2 4.4 3.0 2.5 2.5 2.5 2.8 2.6 2.6 2.5 2.5 2.5 5.0 3.7 3.2 2.8 2.5 2.5 2.3 2.2 2.1 2.1 2.2 2.2 2.1 2.1 3.4 3.7 75 2 . . 17 25 3 18 301 4 19 232 5 20 204 21 218 6 22 99 46 64 89 7 8 9 10 26 .... 194 11 27 12 28 13 29 14 30 15... 31 Note. — Daily discharge determined as follows: Aug. 12 to Nov. 8, 1912, computed from weir formula Q-3.33 L Hf. Nov. 9, 1912, to Sept. 30, 1914, from fairly well-defined rating curve. Oct. 1, 1914, to Sept. 30, 1915. from rating curve fairly well defined I No gage-height record Jan. 29 to Feb. 28, 1914. No gage-height record Nov. 22-30, Dec. 5-9, 1914, and Mar. 16, 1915; discharge estimated. I between 1 and 80 second-feet. Monthly discharge of Boulder Creek at mouth, near Lakeside, Calif., for 1912-1916. 1912. August 12-31.. September 1912-13. October , November December January February March April May June July August September..., The year.. 1913-14, October November — December January 1-28 February March April May Discharge in second-feet Max.- Mini- mum, mum. 4.3 5.3 12 26 18 11 3.0 9.5 8.0 6.5 3.( 11 5 12 19.5 0.83 3.00 1.5 2.3 2.0 2.0 2.2 8.0 3.0 1.6 2.5 2.5 3.0 1.8 .3.0 2.5 2.8 5.53 4.20 4.63 3.18 2.56 3.70 6.64 12.2 5.77 2. .34 5.14 .5.40 3.70 3.23 4. 86 2.22 2.05 2.13 G.84 4.91 4.64 5.15 Run-off (total in acre- feet). 219 250 369 750 343 144 306 332 3,520 302 276 317 1913-14. June July August September 1914-15. October November. . . December . . . January February March April May June July.... August September. . . The year . 1915-16. October November December January 1-26. . The period . Discharge in second- feet. Maxi- Mini- mum, mum. 3.6 8.0 4.2 11 8.0 116 183 48 76 190 21 17 7.0 6.0 9.0 301 1.1 .0 1.0 1.0 1.4 1.5 2.2 10 12 7.4 21 6.0 3.1 4.7 4.7 1.0 4.4 1.4 2.0 3.1 2.06 . 2.77 2.96 2.01 1.99 2.46 2.71 10.2 43.5 24.3 18.1 60.8 11.4 5.24 6.62 7.11 16.0 5.05 3.17 3.24 64.2 Run -off (total in acre- feet). 123 170 122 146 167 627 2,420 1,490 1,080 3,740 678 322 407 423 11,61 311 189 199 3,310 4,010 CUYAMACA WATEK OO.'S FLITME i AT DIVEHTING DAM, NEAB LAKESIDE, CALIF. Location. — In SE. J sec. 11, T. 14 S., R. 2 E., just below intake, at diverting dam about 13 miles northeast of Lakeside, San Diego County. Records available. — ^June 1, 1912, to September 30, 1918. Gage. — Vertical staff in stilling box on outside of flume, about 1,000 feet below intake; installed April 8, 1916. Staff and water-stage recorder previously used were 500 feet below intake and just above sand box. Datum has always been elevation of floor of flume. (See PI. IX, 5, p. 60.) 1 Previously called San Diego flume. 94 SURFACE WATER OF PACIFIC SLOPE^ SOUTHER]^- CALIFORNIA. Discharge measurements. — Made from foot plank across flume at gage. Channel and control. — The flume was limed with tar paper in 1914 to reduce leakage. Extremes op discharge. — 1912-1&18: Maximum mean daily discharge 61 second- feet March 24, 1913. No flow for certain periods nearly every year. Accuracy. — Stage-discharge relation not permanent throughout the period covered by record on account of changes in flume. Several well-defined rating curves have been used. When water-stage register was not in operation staff gage was read to hundredths three times daily. Mean daily gage height determined from gage height graph by inspection. Daily discharge ascertained by applying mean daily gage heights to rating tables. Records good. Cuyamaca Water Co. 's flume which diverts water from San Diego River and receives water from the South Fork of San Diego River, is more than 30 miles long, 6 feet wide and 24 inches deep. It discharges into La Mesa reservoir, about 8 miles northeast of San Diego. (See also p. 99 and PI. IX.) This system supplied the city of San Diego with water until 1906, when the Southern California Mountain ¥/ater Co. extended its system to the city. The flume was again used to furnish the city of San Diego aft^ the floods of 191 (J, and it now supplies water for irrigation and domestic service. The Capitan Grande Indian Reser^'-ation has a water right of 0.8 second-foot from this flume. At the sand box, just below the gage, water is occasionally wasted into San Diego River. Discharge measurements of Cuyamaca Water Co.\sflu7ne at diverting da^n, near Laheside^ Calif. Jor 1912-1918. 1912. May 1 24 24 24 24 24 24 July 15 15 15 15 Aug. 16 Oct. 2 Nov. 9 I>ec. 16 1013. Jan. 13 22 Feb. 16 Mar. 15 May 13 1&14. Jan. 20 20 20 20 Max. 10 11 Apr. 7 20 May 13 Oet. 16 16 Oct. 17 Dec. 23 1915. Jan. 7 13 20 27 28 Feb. 6 14 17 18 o 3Day. Made by- F. C. Ebert. do ..do. -.do., ..do. .At.. ..do. W. &. Post... Taylor and Hanitt. . W. S. Post.. F. C. Eberi- E. W. Case... F.C. Ehert. .-..do do Cuyamaca Water Co do ....do -...do W. S. Post C. E. Hickok.„..---. do - F.C. Ebert ....do do. do do D. A. McClung D. A. MeClung do do do.. do Lee and Ebert W. &. Post R.W.Day.. do Gage height. Feet. 1.71 .50 .68 .96 1.19 1.67 1.92 .82 .58 1.30 .56 .43 .27 .70 1.15 1.28 1.28 .90 .57 .95 .32 .12 0.36 .56 .43 .43 1.18 .87 Dis- charge. Sec.-Jt. lb. 5 22 40 49 8.4 4.4 2.2 14.5 7.0 3.0 3.3 3.3 9.4 8.6 9,7 4.4 23 5.1 6.0 2.2 11.7 25 25 24 13.6 6.0 12.2 1.2 (a) 1.5 2.5 2.3 2.1 17.5 10.5 12.0 34 1915. Feb. 24 25 Mar. 3 4 10 Mar. 31 Apr. 7 21 22 29 May 12 19 26 June 2 July 10 Sept. 24 Dec. 8 191G. A-pr. 14 May 24 Dec. Vi 13 22 1917. Nov. 7 7 7 1918. Feb. 8 Mar. 7 Made by — R. W. Day . do ....do do ....do do . do. do. ....do do. F.C. Ebert R. W. Day do do... do.... do do Day and McClung;- McClnngaDd Harritt. ..do. ..do. ..do. -do. . .ao. A. MeChmi,'.. F.C. Ebert.. ^-- ....do ....do F. C. Ebert D. A. McClnne;. F.C. Eber^ -.'--. do .do. D. A. MeClung.. do .do. .do. .do. ..do. A. MeClnng.. e. Ebert Gage Dis- height. charge. 1.67 1.68 1.59 1.60 1.60 1.60 1.63 1.62 1. 63 1. CO 1. 55 1.10 1.10 1.68 1.68 1.70 1. 59 1.48 1.16 1.23 1.17 L02 .40 1.33 .92 Sec.-ft. 32 32 31 32 25 24 25 26 26 26 25 15.6 15.9 23 11 4.1 32 29 25 21 13.6 10.8 6.2 4.8 26 18.5 10.5 2.3 5.5 4.3 10.5 7.0 13.4 2.6 9.3 22 12.2 SAjS" DIEGO KIYEK BASII^. 95 Daily discharge, in second-feet, of Caijwnnca W&ter Co.'s flume at diverting dam, near Lakend^, 'CaUf..for i912~1918.. Day. 11.6 10.7 9.1 7.8 7!.2 6.9 6.9 6.9 6.9 10.0 6.9 8.0 7.4 8.9 9.1 9.3 6.9 7.2 10. 2 10.0 10.4 9.1 7.8 2.1 6.3 7.2 Sept. 3.6 4.1 4.8 2.6 3.2 4. 2.9 3.2 16 -■ 6.9 17 18 7.6 1 5. 9 19 . ... 1 4.4 20 i 7 21 ! 7.6 22 9 23 11 2 24 ' 11.9 25 12 6 26 . ' 10.7 27 1 9. S 28 . . 11. 2 29 11 2 30 1 12_« 31 :. Aug. Sept. 9.8 9.3 10.7 10.7 10.2 8.9 10.2 8.9 10.7 10; 2 .6 5.1 8.0 .2 1.7 3.1 2.8 3.3 2.9 2.8 2.8 2.6 3.1 2.7 2.6 2.9 2.7 2.8 2.4 3.0 3.0 2.6 10 6.9 4.8 3.7 2.0 2.0 3.2 3.1 4.2 3.1 3.1 3.0 3.0 2.7 3.2 3.5 3.( 3.2 3.6 3.3 3.8 4.0 I 3.5 ! 4.5 ; 4.1 i 3.8 I 3.8 4.0 I 3.8 3.8 3. 5 I 3.5 I 3.5 I 3.6 ' 3.7 3.8 1 3.0 3.0 i 3.5 3.7 i 4.0 ! 4.0 i 3.3 3.6 I )ec. Jan. 2.3 2,5 2.4 1.4 4.0 2.6 4.0 2.8 3.5 2.9 3.1 1.5 3.5 1.1 3.3 1.4 3.2 . 5 3.1 2.7 3.2 5.6 3.3 8.0 3.3 7.2 3.3 5.5 3.5 4.4 .3.6 6.4 3.6 8.8 3.5 8.8 3.5 8.8 3.3 8.5 3.3 8.1 3.1 9.0 3.1 8.8 .9 7.9 2.0 6.7 .3.2 5.0 3.0 4.2 2.7 3.8 3.0 3..8 3.3 4.0 2.7 3.8 4.3: 4.0- 4. 0: 4.0 4.0 4.0 4.0 5.1 4; 8^ ! 4.2 4.2 22 40 32 14 37 51 37 50 37 50 37 37 37 29 24 22 5.5 5.8 lay.. June. 6.1 6. 0: i 5. h; 5.3 3. 2 4.7 3.2 4.8 3.2 4.4 .3.2 4.4 4. 0- 4.2 4.0= 4.2: 5.2 4.4 5.4 4.2 5.2 4.2 5.2 5.8 4.9 5.9 4. 9- .5.9 4. 0^ 6.1 :?.,s i o' ■• -1. '^ •_'. 7 4.5 2. 7 5.1 2.7 6.7 2.9 (). 7 3.0 3. 8.0 3.7 8.0 4.4 s. 4.'.i 8 2 4.1 8.9 4.0 8.0 4.8 7.1 4.9 7.4 8.0 Aug. 4.4 4.1 3.8 3.6 3.5 3.3 I 3.3 .^ept. 2.9 2.8: 2.7 1.7 5.3 4.8 ' 4.5 3.5 3.3 3.3 3.3 3.3 3.7 4.0 4.0 3.8 3.6 3.5 3.5 3.6 3.6 :3. ti 2.8 3.7 4.0 3.7 3.8 3.3 2.9 3.0 3.0 3.3 3.2 3.2 3.0: 3.3 3.0 3.0 3,2 2,9 96 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge^ in second-feet, of Cuyamaca Water Co.'s flume at diverting dam, near Lakeside, Calif., for 1912-1918— Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1913-14. 1 3.5 2.5 2.1 2.3 2.2 2.4 2.5 2.3 1.4 2.8 2.7 2.4 2.0 2.2 2.7 2.3 2.4 2.4 2.4 2.2 2.6 1.6 1.3 1.2 .5 .2 .0 .0 .6 .5 .0 2.0 1.6 2.3 3.8 4.9 3.3 3.3 3.3 3.3 3.9 3.2 3.3 1.9 2.5 2.3 1.3 0.0 .0 .0 .0 .0 .0 .0 .6 .6 .0 .0 .0 .0 .6 .0 .0 .9 .9 .0 .6 .6 2.4 6.2 3.8 .0 1.6 3.9 3.0 3.0 3.0 2.0 3.0 2.8 2.3 2.4 2.4 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .7 .0 1.2 .0 .0 .0 .0 .0 8.3 18 19 19 3.0 2.9 2.6 2.5 2.4 2.4 2.4 2.4 1.8 1.9 2.5 2.6 2.4 2.4 2.4 2.4 2.4 2.5 1.9 2.1 2.4 6.2 15.5 18 12.5 12.5 15 9.4 8.5 10 14.5 19 19 19 19 15 16 16 8.7 11 11 11 11 13 12 11 9.4 7.8 11 6.6 9.8 3.5 19 24 28 22 29 28 28 25 17.5 1.5 2.0 12.5 10 23 25 25 16 .6 .1 6.8 12.5 2.0 8.1 8.1 7.8 19 16 17.5 22 27 31 30 32 32 32 28 28 28 28 28 28 26 25 24 25 24 23 23 19 18 20 18 16 16 16 15 15 14 15 14 14 17 17 22 24 24 30 28 32 32 32 32 32 32 27 25 23 25 25 26 26 26 26 26 25 26 26 26 26 26 26 26 26 26 26 26 26 22 19 16 15 14 15 17 17 14 14 14 14 14 13 12 11 11 11 6.0 6.4 7.2 12 21 27 26 19 16 15 16 15 26 25 24 24 24 25 25 24 21 19 17 17 18 16.5 15.5 15.5 15.5 15 17.5 13.5 16 10.5 10 10.5 10.5 17.5 6.4 3.5 2.6 5.7 13 14 20 25 24 13 14 11 12 16 14 14 12 11 11 12 11 13 9.1 8.3 7.4 7.8 7.6 7.8 7.8 8.3 7.4 7.6 7.0 6.6 5.7 3.3 3.8 17 15.5 3.3 15.5 27 30 30 30 30 31 31 31 31 31 31 31 31 31 31 31 29 29 29 29 29 29 29 29 29 5.5 5.5 5.5 5.7 5.7 5.1 3.9 11 9.6 11 6.4 3.8 6.2 3.8 4.7 3.3 .1 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 29 29 29 29 29 28 28 28 28 28 28 27 25 25 25 25 25 25 25 25 21 21 22 22 22 18 18 18 17.5 14 0.0 .0 .0 .0 .0 .0 .0 .0 5.0 3.0 2.0 3.5 4.6 4.3 4.4 4.6 4.6 3.0 3.3 3.8 3.0 3.0 2.9 2.6 2.8 2.6 2.8 2.8 2.8 2.9 3.3 15 15 . 14.5 14.5 14 12.5 12 10.5 10.5 10.5 11 9.6 7.3 9.3 8.2 6.9 9.1 7.8 7.6 8.2 8.0 7.8 8.2 8.7 12 8.9 8.7 8.4 8.7 8.7 7.6 4.1 3.2 2.4 3.2 3.9 2.9 4.3 3.9 3.5 3.2 2.4 2.4 3.2 3.2 3.0 3.2 3.3 3.3 3.3 3.8 3.8 3.9 3.8 3.2 3.2 3.6 3.5 3.5 3.2 3.2 3.6 8.0 6.7 6.9 8.7 8.4 8.4 8.4 8.7 9.6 9.3 9.3 8.9 7.8 7.1 7.1 7.3 6.3 6.3 6.3 7.3 7.6 6.5 5.8 5.4 6.3 7.3 4.8 4.8 5.4 6.1 6.7 3.8 3 8 2 3 3 5 4 3 5 5 2.8 6 3 2 7 3.0 8 . ... 3 6 9 3.3 10 2.1 11 1.5 12 1.9 13 1 9 14 2.0 15 2 3 16 2.3 17 2 1 18 2.0 19 1.9 20.. 1 4 21 1.2 22.,.. 1 5 23 1.8 24 1 8 25 1.8 26 1.6 27 . 1 6 28 1.4 29 1 8 30 1.2 31 1914-15. 1 8.0 2 8 4 3 6.0 3.5 1.9 2.0 1.7 1.5 1.1 .9 1.4 1.9 1.6 1.4 1.2 1.3 1.2 1.2 1.3 1.3 1.5 1.6 1.6 1.6 1.9 2.3 2.5 2.0 1.9 1.9 1.9 6.9 4 7.6 5 8 6 6.7 7 8 9 8 8.9 9 8.7 10 9.8 11 9.8 12 9.8 13 9.8 14 .... 8.2 15 8.2 16 . . . 8.4 17 8 2 18 4.8 19 4.8 20 5.0 21 6.5 22 6.3 23 4.3 4.3 3.8 3.0 3.9 4.3 3.6 3.6 3.3 6.3 24 .... 6.3 26 6.5 26 6.5 27 6.7 28 5.4 29 5.6 30 5.6 31 SAN- DIEGO RIVER BASIN. 97 Daily discharge, in second-feet, of Cuyamaca Water Co.'s flume at diverting dam, near Lakeside, Calif., 1912-1918— Contt.aed. Apr. May. July. Aug. 6.5 6.1 5.9 5.9 6.9 5.9 7.2 4.8 4.4 5.4 5.4 5.4 5.4 4.2 4.2 5.6 3.8 5.0 6.1 4.4 7.4 5.6 3.5 .0 2.9 4.9 5.0 6.2 5.2 5.2 5-2 5.2 5.2 5-2 5.2 5.2 5.2 5.2 6.2 5.2 5.2 5.2 5.7 5.6 6.6 5.6 5.0 5.0 5.5 5.7 7.4 4.8 2.5 2.0 2.3 2.4 2.5 2.5 2.5 2.4 2.2 2.2 2.2 2.4 2.5 3.6 3.6 3.4 3.4 3.4 3.4 3.6 5.6 5.6 5.6 5.6 6.6 5.6 5.6 5.6 5.6 5.6 5.6 6.6 5.6 5.6 5.4 5.4 5.6 6.6 6.6 5.6 5.6 5.6 5.6 6.6 4.3 3.7 3.7 3.7 4.8 10.5 9.0 7.2 1.4 1.8 3.1 4.4 7.2 15.5 3.7 3.7 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.4 2.6 2.6 2.6 2.6 2.6 2.6 2.6 2.6 3.8 4.0 4.6 1.8 6.2 6.2 9.1 9.1 9.1 9.1 14.5 13 15 15.5 10.5 9.0 9.0 9.0 9.0 9.0 9.4 9.0 9.0 12 14 12 10 9.1 9.1 5.6 4.3 4.0 5.0 4.0 4.0 2.1 1.4 1.4 5.6 5.6 6.2 3.3 3.0 3.0 2.9 3.0 3.0 3.0 3.0 2.6 2.3 2.3 2.3 3.7 4.0 2.2 .0 .0 .0 .0 .0 .7 1.0 1.0 1.0 3.7 3.7 2.3 2.3 2.3 3.3 3.7 2.1 2.7 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.4 6.6 5.2 3.7 6.2 5.2 5.2 5.2 5.2 5.2 5.2 5.2 6.2 5.2 6.2 5.2 5.2 4.8 3.7 3.7 3.7 3.3 4.8 6.1 6.1 .0 .0 4.3 3.7 3.7 3.7 3.3 13 26 26 26 26 26 26 26 26 26 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 2.0 1.0 .2 .7 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 3.1 4.4 5.2 27 21 20 20 20 19.5 18.5 19 20 26 26 26 18.5 18 18 17.5 17.5 16.5 16 15.5 15.5 5.2 5.2 6.2 5.2 6.2 6.2 5.2 5.2 5.2 5.2 5.2 5.2 5.2 5.2 6.2 6.2 5.2 5.2 6.2 5.2 5.2 5.2 6.2 5.2 5.2 5.2 3.7 3.7 3.7 3.7 3.7 15.5 14.5 13 12.5 11 10 5.2 13.5 14 14 8.7 7.6 5.7 11.5 12 12.5 12.5 12 10 7.0 7.0 7.0 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 4.4 4.9 4.9 6.8 8.7 11.5 8.7 8.5 7.6 7.6 7.2 6.8 6.5 6.1 4.9 5.0 7.0 7.6 9.1 7.8 5.2 4.0 3.7 3.7 5.9 6.1 5.2 11.5 8.5 5.6 5.7 5.7 5.2 5.0 4.9 4.6 4.4 4.0 3.7 3.7 3.7 3.7 4.2 10 8.5 8.3 8.3 8.3 10 9.1 8.0 7.4 7.4 8.7 7.6 7.0 7.0 9.3 7.6 7.8 7.6 7.8 8.0 8.5 8.0 8.6 10.5 8.9 8.5 11 5.2 3.7 3.7 3.7 3.7 3.7 4.0 4.3 3.7 3.7 3.4 3.0 3.0 3.8 4.3 6.7 6.2 4.6 4.0 5.4 3.1 3.0 4.0 3.3 3.1 8.5 8.0 8.0 6.1 6.1 5.9 5.6 5.6 5.6 6.6 6.6 6.6 142131°— 21--WSP 447- 98 SURFACE WATER OF PACIFIC SLOPE; SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Cuyamaca Water Co.'s flume at diverting dam, neco' Lakeside, Calif., for 1912-1918— Gontinned. Day. 1917-18. 1 2 3 4 5 6... 7 R ' 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24..: 25 26 27 28 29 39 31 6.1 6.3 6.3 6.5 6.8 8.0 7.6 7.6 7.8 7.8 7.2 5.9 4.4 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 7.8 4.6 3.7 3.8 5.2 7.6 4.9 1.5 4.0 3.0 3.0 4.3 5.2 5.0 5.0 5.0 5.0 4.0 4.9 5.2 5.4 5.7 5.6 Jan. Feb. Mar. Apr. May. June. July. Aug. 3.0 3.7 9.6 26 8.3 7.4 6.1 ^.8 3.3 4.0 7.8 26 7.6 6.8 5.6 10 3.3 9.8 6.8 26 6.3 4.4 7.0 10 3.4 11 6.3 26 5.7 4.0 8.7 9.3 6.1 21 6.1 24 5.7 4.9 9.1 9.1 3.3 23 6.1 19.5 6.3 4.3 9.3 9.8 3.1 22 10.5 20 6.5 2.7 9.6 10.5 3.3 23 22 18 7.2 2 4 9.6 10 3.4 25 29 18.5 10.5 4.4 9.8 10.5 3.6 25 29 18.5 10.5 6.5 9.6 10.5 3.3 25 20 17.5 8.7 5.6 9.6 10 2.9 25 13.5 18 8.0 6.6 9.6 10 10 26 18 18.5 6.3 6.5 9.1 10 9.3 26 14.5 19.5 6.3 5.9 8.0 10 4.6 ae 28 17.5 5.7 6.8 7.2 10.5 3.1 20 28 16 6.3 7.4 7.2 12 2.7 24 28 14 5.9 8.5 6.5 11.5 2.6 27 28 12.5 7.2 7.4 6.5 10 1.8 22 26 9.1 8.3 7.6 7.4 9.8 1.8 12.5 15 9.6 7.8 8.3 6.5 9.8 2.0 10.5 25 10.5 8.0 6.8 7.6 9.8 2.0 23 27 12.5 8.3 7.8 8.7 9.8 2.0 23 28 11 9.1 7.0 9.3 9.8 2.0 23 25 12 7.0 7.8 9.6 9.8 2.0 18.5 25 11.5 6.6 7.4 9.8 9.8 16 20 27 10 6.6 6.8 9.8 9.8 17 16.5 26 9.6 6.6 6.3 9.8 9.8 7.0 13. 5 26 8.3 7.2 6.3 9.8 10 5.2 26 8.5 14 6.1 9.8 10.5 3.7 26 8.7 13.5 6.5 9.6 10.5 3.7 26 7.8 9.6 10.5 Sept. 10.5 7.4 6.3 6.6 6.5 6.3 6.3 7.4 8.7 10.5 10 6.1 6.6 6.1 6.3 7.2 8.0 9.3 9.6 9.6 10 Note.— Probably no discharge during November, 1913. Discharge Oct. 27, '?8, 31, Dec. 6 and 7, 19^13, and July 8-10, 1914, estimated. No record Oct. 1-2 and Nov. 17 to Dec. 22, 1914. No flow Jan. 18 to Apr. 7, Oct. 9^, 1916, and Feb. 7-11 and Dec. 1-18, 1917. Discharge July 24, 1918 interpolated. Monthly discharge of Cuyamaca Water Co.' s flume at diverting dam,, near Lakeside, Calif., for 1912-1918. 1912. June July August September. . . 1912-13. October November. . . December . . . January j^ebruary — March April May. June July......... August September. . . The year Discharge in second- feet. Maxi- mum. Mini- mum. 12.6 i 10.7 I 10.4 ; 8.2 4.4 4.0 .2 2.4 2 2.7 .9 .5 4.0 8.2 5.5 2.6 4.2 3.5 3.2 1.7 9.04 6.33 3.20 4.07 3.58 3. 12 5.05 12.0 32.2 14.6 3.94 5.95 6.28 3.60 3.10 Run^jff (total in acre- feet). 514 556 250 213 192 311 242 354 221 184 8.11 5,870 1913-14. October November December , January February March , April May , June , July , August September The year. .. 1914-15, October 3-31.... November 1-16. December 23-31 January February Discharge in second- feet. Maxi- Mini- mum, mum. 3.5 .0 6.2 19 27 25 11 4.6 4.3 6.0 4.9 4.3 18 32 0.0 .0 .0 .0 3.5 14 6 5.7 .0 .0 2.4 1.2 1.3 3.0 1.8 .1 Run-off (total in acre- feet). 1.81 .0 1.09 2.55 15.6 21.0 15.0 11.9 3.23 2.50 3.36 2.25 6.64 2.89 3.79 5.56 16.5 111 67 157 732 192 154 207 134 4,80» 105 92 342 916 SAN DIEGO RIVER BASIl!?, 99 3Iantkly discharge of Cuyamaca Water Co.^s flume at diverting dam, near Lakeside, Calif. ^ for 1912-1 9 is—Continued. Montli. Discharge ia second- Run-ofE (total in acre^ feet). Month. Discharge in second- Run-ofl (total in Maxi- mum. Mini- mum. Mean, Maxi- mum. Mini- mum, Mean, acre- feet). 1914-15- Mafeb 32 26 31 29 15 9.6 9.8 23 2.6 3.3 14 6.9 4.8 4.8 27.2 16.4 26.0 24.4 9.9» 7.21 7.35 1,670 976 1,600 1,450 614 443 437 1916-17. January 10 4.0 6.1 5.2 5.2 12.5 11 9.6 7.0 1-4 .0 3.0 .2 3.7 3.7 7.0 5.6 5.2 5.52 2.09 4.71 2.90 4.96 6.31 3.48 6.67 6.28 339 April February March 116 May . 290 April . ... 173 July May 305 TuTifi 375 September July 521 410 374 1915-16. 7.2 7.4 15.5 15.5 .0 .0 26 27 15.5 11.5 5.7 9.6 4.2 2.0 .0 :S :§ 15.5 5.2 3.7 3.0 2.4 5.50 3.47 3.39 6.09 .00 .00 15.8 21.8 11.1 5.39 3.93 5.88 338 206 208 374 940 1,340 660 331 242 347 Septem'oer The year 1917-18. October November December January 12.5 .0 5.19 3,760 8.0 7.8 6.3 17 27 29 26 14 8.5 9.8 12 10.5 3.7 J. 5 .0 1.8 3.7 6.1 8.3 5.7 2.4 5.6 9.1 5.6 5.50 4.79 1.70 4.-53 19.6 20.6 15.9 7.74 6.24 8. 56 10.1 8.08 Febraary March 338 November December January 285 April 105 May 279 June February March 1,090 July 1,270 April 946 September May 476 371 The year 27 ,0 6.88 5,000 July 526 621 191&-17. 7.4 5.6 9.1 .0 3.7 1.8 4.99 5.35 3.70 307 318 228 September The year 481 November Desember 29 .0 9.37 6,790 CITYAMACA WATER CO.S FLUME i NEAR LAKESIDE, CALIF. LcMDATioN. — At patrolman's cabin, half a mile above trestle crossing at Los Coches Creek, 3 miles southeast of Lakeside, San Diego County, and 20 miles below intake on San Diego River. Records available. — January 1, 1907, to September 30, 1918. Gage. — Vertical staff in stilling box fastened to outside of flume just below patrol- man's cabin at same site as water-stage recorder. Position of gage has been changed slightly several times since station was first established, but datum has always been same as elevation of floor of flume. (See PI, IX, C.) Discharge measurements. — Made from foot plank across flume at gage. Channel and control. — In the fall of 1914 the flume was deepened 8 inches, and more tar-paper lining was put in. Elevation of flume appears to vary slightly with quantity of water flowing. Capacity of fiume slightly increased as a result of repairs made December 1-19, 1917. Diversions. — Water is diverted into the flume Irom South Fork of San Diego River, and a small quantity is diverted from this flume at Capitan Grande Indian Res- ervation above station. Extremes of discharge. — 1907-1918: Maximum mean daily discharge 25 second- feet February 16, 1918. No flow for certain periods nearly every yeai'. 1- Previously kno\vn as San Diego flume. 100 SUEPACE WATEE OF PACIFIC SLOPE, SO"CTHEIlX CALIFOKXIA. AccTTRACY. — Stage-discharge relation not permanent on account of changes in flume. The flume is in poor condition, and during the summer months contains a growth of moss. Rating cur\-e3 fairly well defined. Gage is read to hundredths three times daily. Water-stage recorder in operation during a part of the record; mean daily gage heights obtained by inspecting recorder graph. Daily discharge ascertained by apph"ing mean daily gage height to rating tables and by shifting- control method. Records for 1916 and 1917 fair: remainder of those for periods covered good. See description of Cuyamaca Water Co.'s flume at diverting dam near Lakeside, page 93. IHscharoe jneasurenutits of Cuyamaca Water Co.'s f.ume near Lakeside, Calif., for 1908- 191S. Made by- Gage height. Dis- charge. 1908. May 27 Nov. 13 Dec. 6 1909. Jan. 25 Mar. 23 2o Apr. 6 19 May 25 1910. Jan. 22 Feo. 12 Mar. 4 11 Apr. 1 3 25 27 May 6 23 Tone 3 26 Nov. 18 1911. Feb. 10 Oct. 9 W.V. Hardv. do "... do W.V. Hardv. do :.. do .do. Clapp and Hardv . W.V. Hardy...'.. W.V.Hardy. do do do do do do do do do do do do W.V. Hardv - F.C. Ebertl-. 1912. May 6 F.C. Ebert. Jime 29 do. . _ Aug. 20 , E. W. Case. . Oct. 4 ■ F.C. Ebert. 1913. Jan. 23 Feb. 17 Mar. 16 Apr. 15 May 14 June 20 Aug. 24 Feet. 0.66 ..50 .27 .52 .51 .74 .42 .74 .SO .35 .53 .56 .64 .30 F C.Eb«»rt ..do -.do H D. McGUsban F C. Ebert ..do ..do ..do Oct. 3 1914. do Feb. 1 F.C. Ebert Mar. 3 do 24 do Apr. 19 Mav 12 do do Oct. 5 do 16 do Dec. 30 D. A. McClong- 1915. 1 Jan. 14 D. A.McClong ,- 1 21 do See.-ft. 9.6 5.8 1.8 6.3 6.2 12.4 4.5 11.5 11.6 3.3 7.8 8.8 9.8 11 6.8 12 12 11 8 9.5 8.1 2.7 14 12.8 10.4 4.7 2.6 8.2 3.6 1.7 42 4.7 3.0 2.2 .4 1.7 16 16 11 12 2.3 2.1 4.0 2.0 1.5 1915. Jan. 27 10 25 Mar. 3 5 10 17 24 29 Apr. 1 7 14 21 28 May 5 ■ 12 18 19 26 i June 2 \ ! 9) 16 F.C.Ebert D.A.McChing...-..- F.C. Ebert-... Ebert and McClung . . F.C.Ebert..-. Lee and Ebert C.H.Lee.. D. A. McClung... R.W. Dav .do. ■ F. C. Ebert - R. W. Dav- ..-..do...'.- .do. F.C.Ebert....... ...do R.W.Dav do...'- do .do- McChmg and Harritt.. do F.C.Eben.--- McChmg and Harritt.. do 21 30 July 8 1916. Apr. 13 22 Z) May 7 as June n July 17 Dec. 15 191 7, Feb. 14 Mar. 2S Apr. IS Wav 'Z.^ Nov, 8 9 10 11 Dec 22 1918. 1 Feb. 7 Mar. 9 May 7 Aug. 22 Kept. ' do ---.do ...-do--. McCltms and Ellis. D. A. McClung F.C.Ebert F.C.Ebert.... do do .do- D. A. McChmg.. F.C.Ebert do W. J. Isbell F.C.Ebert. do- McGlashan and Ebert. F.C.Eberr D. A. McClung do do do do F.C.Ebert D. A. MeCtang.. F.C.Ebert do do D. A. McClune... SAN DIEGO RIVER BASIN. 101 Daily discharge, in second-feet, of Cuyarhaca Water Co.' s flume near LaJceside, Calif., for 1907-1918. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1907. 1 9.2 9.5 12.2 10.0 7.7 7.2 7.0 10.0 5.3 4.5 2.2 3.6 4.6 5.7 3.0 3.2 3.6 1.7 1.9 2.3 2.6 3.0 2.4 2.7 1.4 1.3 1.8 1.9 6.1 4.3 1.4 4.5 4.3 3.9 3.9 3.9 3.7 2.4 2.2 2.3 2.3 3.9 4.3 5.9 5.9 5.5 5.7 6.8 6.3 5.0 5.5 7.0 7.5 8.2 9.7 11.1 11.1 11.1 11.1 10.3 11.1 11.6 1.2 .8 .8 .8 1.5 1.3 1.2 1.4 1.5 1.4 1.5 l:f 5.3 5.0 5.9 5.7 5.3 3.9 1.9 1.9 2.3 1.9 4.6 6.8 6.3 4.8 2.7 11.1 11.1 13.4 5.7 7.2 7.7 8.2 8.7 8.7 5.9 5.7 5.5 6.8 2.4 2.0 3.9 8.2 .0 .0 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.7 5.0 3.2 2.7 2.6 2.4 5.7 4.5 4.1 4.1 2.4 2.4 2.4 2.3 2.6 2.9 3.0 2.7 2.7 2.7 3.0 2.7 3.0 4.1 3.9 3.6 4.6 3.6 2.6 3.2 3.6 3.6 3.2 5.5 2.9 2.9 3.2 2.7 2.0 1.9 1.9 1.9 1.8 1.8 2.4 4.5 4.5 4.5 4.3 4.1 4.1 4.3 4.3 4.8 4.1 4.3 4.1 3.9 2.4 4.8 5.0 3.7 4.1 4.8 4.8 6.8 7.0 6.3 6.6 6.6 5.9 6.3 6.3 5.9 5.9 5.9 7.7 7.7 7.0 6.8 6.6 6.3 6.1 5.9 5.9 5.9 9.5 11.1 11.1 11.1 11.1 11.1 11.1 11.1 11.1 4.6 4.8 4.8 7.0 6.6 6.6 7.0 8.7 9.2 8.7 8.7 11.1 11.1 11.1 10.5 10.5 10.5 10.3 9.5 9.7 10.5 11.4 9.2 10.5 11.4 11.1 10.5 10.5 11.1 10.8 11.1 11.1 11.1 11.9 10.0 8.7 8.7 8.7 8.7 8.7 11.6 13.4 12.5 10.5 10.0 10.0 9.7 10.0 10.0 9.5 10.0 10.5 11.4 14.0 14.3 14.6 14.9 15.2 16.1 16.1 16.1 11.1 12.5 12.5 11.9 11.4 11.1 10.8 10.5 10.3 10.3 10.3 11.1 11.6 10.8 10.3 9.7 9.5 8.4 7.6 6.1 7.5 6.6 6.8 5.7 5.9 7.7 8.4 8.4 7.7 7.7 8.0 16.1 13.1 10.8 10.0 6.6 7.0 7.0 8.4 9.5 8.2 8.7 9.5 11.6 16.1 8.2 7.0 8.2 9.2 8.7 8.2 9.2 10.0 9.5 9.5 8.7 9.2 9.2 8.7 8.4 8.7 8.0 6.6 6.6 6.3 6.1 6.3 5.9 5.9 5.9 5.9 7.0 8.2 7.7 6.6 6.3 6.8 7.0 7.5 7.5 7.5 7.0 7.0 7.2 6.8 7.0 7.0 7.5 7.7 7.7 7.5 8.7 9.2 10.5 11.1 10.8 10.8 10.8 11.1 10.5 9.7 9.7 8.4 8.2 8.2 9.7 10.5 10.5 9.7 8.7 9.5 9.7 9.5 9.5 9.5 9.5 10.0 10.0 10.3 9.5 9.2 9.5 7.5 7.7 7.7 7.2 6.6 6.8 6.8 7.2 8.0 8.2 8.4 8.0 8.0 8.2 8.2 8.4 8.7 7.7 7.0 5.9 5.9 8.0 8.2 7.7 8.0 4.3 6.8 7.2 7.0 7.2 8.4 9.5 8.7 8.2 7.5 7.5 7.7 7.2 7.0 6.3 7.0 8.4 8.7 9.7 9.5 9.5 14.0 10.0 9.7 9.7 10.0 10.5 9.5 8.2 7.7 7.5 8.0 9.5 9.7 9.5 10.0 10.3 8.7 8.7 9.2 8.2 7.2 7.7 6.1 6.8 7.7 7.7 4.1 1.8 3.0 7.5 7.7 5.7 6.8 7.2 7.5 8.0 7.7 7.7 7.5 7.2 7.5 8.2 8.0 8.0 8.0 8.0 8.2 10 2 8 2 3 6 8 4 7 5 5 10 6 9 5 7 9.2 s 8 g 8 2 10 9 7 11 9 7 12 10 13 10 14 10.3 15 10 3 16 9 7 17 10 18 10.0 19 10 3 20 10 3 21 9 2 22 5 7 23 6 1 24 10 25 10 26 10 27 9 7 28 . 10 29 8 7 30 9 2 31 1907-8. 1 8.4 8.4 9.2 8.4 8.0 7.7 8.2 7.5 6.3 6.8 6.8 6.6 6.1 6.3 9.2 8.4 7.0 5.5 5.3 5.7 3.7 5.0 7.0 5.7 6.3 6.8 6.1 6.3 6.6 2.9 3.2 4.5 3.6 4.5 4.3 4.1 3.2 3.9 4.6 4.6 2.3 4.6 4.3 3.7 2.0 .2 .9 1.7 .4 1.2 .0 .0 .0 .3 6.1 6.8 6.8 7.0 2.2 4.3 2.7 5.9 2.3 4.3 2.6 6.3 2.4 7.2 7.0 1.7 ,6 .9 1.5 .6 .7 3.6 .4 .2 .1 .0 1.8 2.2 4.1 1.7 1.7 3.6 .0 1.5 3.6 5.9 9.2 2.9 7 7 2 6 8 3 7.2 4 8 2 6 7 7 6 6 3 7 5.9 8 6 1 9 7 2 10 ... - - 7 7 11 6 3 12 6.3 13 5 14 6 1 15 7.2 16 8 2 17 8 4 18 8 4 19 8 7 20 7 21 6 8 22 6 3 23 8 4 24 .... .*. . 9 7 25 6 3 26. ... 9 2 27 9 2 28 9 2 29 8 7 30 . ... 8 31 102: SURFACE WATER OF PACIFIC SI.OPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Cuyamma Water Co.' s flume near Lakeside, Calif, for 1907-1918— Gontmned. Apr. . May. July. 7.0 8.0 8.0 r.5 6; 8 6.3 6.1 7.5 7.t 7.5 6.8 6.6 5^.0 5.5 5.3 4.6 4.3 4.5 4.8 5.9 517 5.7 5.7 5.5 5.9 4,8 5.3 5.0 2.6 2.7 5.3 5.5 5.7 5.5 5.3 4.6 2.7 .3 2.9 5.5 5.5 4>3 3.2 2; 6 2-7 2.7 2,6 3.( 3,( 2.7 2;0 1.7 1.5 1.4 2.2 316 5.4 6.0 4.6 2.8 2.3 2.3 2.0 2.1 3.0 5.4 5.6 5.6 3.1 7.5 .6 4.2 r.i 13 4.6 2.8 4.0 3.3 2.8 3.3 5.0 4.0 3.0 3.6 5.0 .3 .3 3.0 ,0 .0 .7 .0 4.8 2.0 .1 5.0 2.i 3.0 1.2 1.0 4.8 5.0 4.4 3.1 4.8 4.0 1.8 2.5 5.2 4.2 4.2 5.2 8.2 8.4 8.2 8.0 8.0 12 12 12 12 13 13 13 13 12 12 13 13 13 12 12 13 13 13 13 13 12.4 13 12 12 12 10 8.2 7.3 2.0 8.4 8.2 7.5 6.6 6.0 8.7 10 11 10 11 11 9.4 6.2 6.0 5.8 8.0 6.4 5.2 5.2 5.6 6.6 6.9 6.9 8.0 8.0 7.1 6.9 7.5 7.7 7.5 8.0 1.1 7.3 7.1 7.1 6.6 7.7 8.0 8.0 7.3 6.6 6.0 5.4 7.1 8.0 8.0 8.2 7.5 5.8 6.i 8.2 8.0 8.2 7.3 9.6 .0 .0 6.6 7.5 7.1 7.7 7.3 5.8 0.8 0.8 0.8 0.6 0.6 6.4 5.8 5.8 6.4 6.2 6.9 7.3 6.4 5.{ 5.8 5.8 5.8 5.2 4.4 6.4 8.4 8.2 6.0 5.0 5.0 5.4 5.8 5.6 6.4 6.5 6.9 4.2 3.8 2.3 6.0 5.6 4.6 4.0 5.6 5.8 7.1 5.6 3.0 1.7 2.0 2.8 3.0 7.3 5.2 5.0 7.7 9.4 9.4 8.2 7.3 7.5 7.1 7.7 6.9 3.7 2.5 2.0 1.6 5.0 4.4 42 €0 5.0 4.0 4,4 3.5 3.0 3.0 2; 7 2.8 2.2 2.5 1.6 .0 .0 6.9 2.2 .0 .0 .2 .0 3.3 7 A 3.2 2.8 1.7 .7 .0 .0 .0 1.3 4.4 3.3 1.7 .0 5.6 5.4 .0 .9 .0 7.4 6.9 4.8 .0 .0 9.2 8.5 2.0 .2 4.4 8.0 8.0 7.4 7.4 7.4 7.1 7.! 8.5 7.1 7.J 4.0 .5 2.1 .0 1.1 7.1 5.0 5.2 2.4 2.0 3.2 6.7 8.0 4.2 2.4 2.4 3.0 5.2 8.5 10.4 10.2 10.2 12.3 14.2 13.6 12.5 12.3 11.4 12.0 12.5 12.5 12.8 12. 5 7.6 12.5 12,3 H.7 10. i 10. t 11.4 11.4 10.7 9.7 9.5 9.5 9.0 8.5 8.7 10.2 9.7 8.0 7.( 9.5 8.5 7.8 7.1 6.7 7.4 7.4 7.6 7.6 8.3 9.5 9.0 9.7 9.9 9.7 9.5 8.5 8.0 6.2 6.0 8.0 9.0 8.7 7.8 7.6 7.8 8.3 8.3 8.3 8.7 8.3 8.0 8.7 8.7 8.3 8.0 7.8 9.7 8.7 7.6 7.4 7.1 7.6 7.8 8.5 8.3 7.6 7.1 8.0 7.4 8.0 8.7 8.5 7.1 6.4 6.0 6.7 7.8 7.8 8.0 8.7 8.5 8.7 8.7 9.0 8.3 7.8 8.3 8.0 o8.S 6.7 5'. 4 5. 4 T-.l 8.3 SAlSr DIEGO EIVER BASIN. 103 Ikiily discharge, in second-feet, of Cuyamaca Water Co.'s flume near Lakeside, Calif ., for 1907-1918— Gontiimed. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1910-11. 1 9.0 9.0 10.2 10.9 8.7 7.6 7.8 8.7 10.2 9.9 12.0 9.5 9.7 9.7 8.3 2.7 .0 .9 5.4 5.4 7.6 8.5 5.0 4,2 6.9 7.4 6.7 5.8 6.2 5.6 6.0 .0 .0 .0 .1 .0 .1 .0 .0 2.2 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 : 5.8 6.0 5.8 6.0 4.8 2.2 4.6 6.9 7.6 6.9 7.4 7.1 5.8 5.6 3.0 .6 .4 2.8 4.8 5.4 5.2 5.2 4.4 3.2 3.0 5.0 5.8 4.6 4.6 4.4 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 ,0 .0 .0 .0 .0 .0 4.2 4.0 4.8 6.4 1 7.8 ■ 6.7 5.6 3.3 6.2 5.6 5.2 4.6 5.0 4.8 4.8 5.0 5.4 5.4 5.8 7.8 5.8 2.3 1.8 3.9 5.2 5.8 4.6 4.2 4.6 4.8 3.2 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .7 3.0 .4 2.5 2.7 2.5 4.6 5.2 5.4 5.6 5.6 6.4 6.4 6.2 8.3 8.7 7.8 7.6 9.5 9.5 8.7 6.9 5.4 4.4 3.9 3.2 4.2 6.7 8.0 10.2 8.5 9.5 10.4 10.2 .6 .2 .2 .0 .0 .2 .0 .0 .0 1.5 .0 .6 1.0 .0 3.0 .1 .4 2.7 1.5 .8 .8 .8 .6 .3 1.1 1.0 1.1 1.7 1.5 1.6 1.0 11.2 11.4 9.5 4.6 5.2 10.9 13.1 12.8 13.1 13.1 H.7 9.9 9.9 11.4 11.4 10.9 9.0 10.9 10.9 10.9 11.4 10.9 10.4 10.4 8.0 1.0 1.2 3.0 1.0 1.0 1.0 1.0 1.0 .9 .9 1.0 1.0 1.1 1.1 1.0 1.0 1.0 1.0 .9 .9 .9 .9 1.3 1.8 1.5 1.1 1.3 1.1 1.0 LI 1.0 1.0 3.0 8.0 3.2 2.5 3.4 2.5 2.1 2.1 4.2 4.4 4.4 3.0 2.5 1.5 1.0 5.4 9.0 7.8 7.4 7.4 7.1 8.0 6.9 4.8 6.7 7.1 7.6 8.7 10.2 10.9 11.4 2.0 5.0 5.8 6.4 9.0 9.7 8.0 5.4 6.4 4.4 11.2 11.7 m.9 13.9 14.4 14.4 12.2 13.9 13.9 13.6 13.3 13.9 13.3 11.4 12.5 12.2 11.7 13.3 13.9 14.7 1^.3 9.9 8.5 12.2 2.5 11.7 10.9 9.9 10.2 11.7 11.2 11.7 12.2 .0 .0 12.8 13.3 13.6 14.8 15.3 15.6 11.7 12.2 14.8 15.0 13.1 13.3 12.8 8.3 10.9 10.9 14.4 14.4 13.6 12.8 14.4 13.6 14.2 16.1 15.0 15.0 14.4 12.2 8.5 8.5 9.7 12.8 12.5 12.2 13.1 13.1 12.8 8.0 8.5 14.4 14.2 14.7 14.7 14.4 15.0 14.7 10.9 11.4 11.7 9.5 11.4 9.5 10.9 10.4 9.5 8.7 8.5 8.5 7.8 7.6 8.5 8.5 7.8 7.1 6.9 5.6 4.4 2.5 4.4 8.0 8.5 9.0 9.5 9.5 7.6 5.8 6.0 11.4 5.0 7.4 13.6 12.8 15.0 13.1 12.0 10.9 10.7 5.8 5.6 5.2 8.5 10.4 6.7 12.5 15.3 15.3 15.0 15.6 14.7 15.3 12. 8 14.4 14.4 14.2 13.9 13.9 14.7 14.4 6.2 5.6 3.2 8.0 8.0 5.4 3.4 2.8 2.7 1.2 2.7 1.0 1.3 3.9 5.6 6.4 7.6 7.4 1.0 .0 .0 .0 2.8 7.4 7.6 8.0 8.3 1.8 .0 .0 14.2 13.1 12.0 10.9 10.7 10.7 10.2 9.5 9.0 9.7 9.5 9.0 8.0 8.5 8.5 7.6 6.4 3.9 5.6 7.1 8.0 10.4 10.7 11.2 10.4 9.0 9.0 9.5 10.2 11.7 0.0 .0 .9 7.1 7.6 8.0 7.1 1.0 .0 .0 .0 .0 .0 7.4 8.5 7.4 5.0 4.8 4.6 5.8 7.6 8.5 1.7 .0 .0 .0 .0 .0 1.0 6.2 7.4 8.7 7.6 7.4 7.8 7.6 6 4 7.8 8.3 7.8 7.1 7.4 7.1 7.4 2.4 .0 .0 .0 .0 .9 6.7 7.4 7.8 8.5 9.0 8.5 7.6 5.6 3.0 1.2 1.3 1.8 3.2 6.7 7,1 6.9 5.8 6.7 5.6 4.5 7.6 8.0 8.5 a 7 6.4 2 6.7 3 6.4 4 6 4 6.4 6- 6 7 5 6 8. . . . 5 4 9 3 2 la 2 5 11 1 12. 2.1 13 2 2 14 . 2 7 15 3.4 3 9 16 17 3 9 18 . 3.5 3.2 2.5 1 3 19 20 . . . 21 22 1 5 23..., 2 24.. . 2.4 .0 .3 .1 25 26 27 28 29 .3 30 31 1911-12. 1. 2.7 3.9 4.4 4.2 3.9 2.5 2.1 2.2 2.2 3.2 2.1 1.6 2.0 2.7 2.1 2.5 2.8 3.2 2.8 2.0 2. J 2.2 3.2 2.7 2.7 2.7 2.8 2.7 2.5 2.5 2.. 3 4.... 5 6 7 8^3 8!o 10.2 8.3 6.4 1 3.9 7 6 s ^ 8. 9.. 10 11 12 7.6 8.0 8.5 8.5 8.3 7.1 7.4 6.7 7.4 8.5 7.6 8.0 7.8 8.5 7.8 6,2 5.6 6.9 8.0 8.0 6.7 8.7 8.5 4.6 4.0 5.8 1:1 7.4 7.6 7.8 5.2 4.2 2.0 1.5 8.0 7.8 1.1 .0 .0 .4 2.2 13 14.. 15 16.. 17 18. . 19.. 20 21 22 23 24 25 26 27 28. 2&... 30...... 3K 104 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Cuyamaca Water Co.' s flume near Lakeside, Calif., for . 1907-1918-—GoJitimiQd. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1912-13. 1 1.4 2.1 2.1 2.3 8.7 10 11 8.7 5.6 3.1 1.2 .2 2.0 2.0 4.2 2.5 4.2 3.6 3.3 4.2 4.0 4.2 4.0 3.6 4.0 4.2 2.3 2.5 2.3 2.1 2.5 2.0 1.8 .4 .7 .8 .7 .9 .7 .2 1.4 .7 .4 . 5 .7 1.0 1.0 1.4 1.0 .9 1.6 .5 .0 .0 .0 .0 .0 .0 .0 .2 2.6 2.5 2.6 2.0 2.1 3.1 3.3 2.5 2.8 3.0 3.0 3.1 2.6 2.6 2.5 2.5 3.0 2.5 2.1 2.1 2.1 2.0 2.0 2.0 2.8 2.6 2.1 2.0 2.0 2.1 2.1 1.6 1.6 2.3 2.8 2.5 2.8 2.3 2.0 1.8 1.8 2.0 2.3 2.1 2.3 2.1 2.3 2.5 2.3 2.5 2.1 2.3 3.0 2.8 3.1 .7 2.8 2.5 2.3 2.3 3.0 2.8 2.3 2.0 2.0 1.7 .0 .0 .1 .2 .2 .2 6.9 6.6 6.0 4.2 4.8 7.3 7.5 7.5 6.9 7.1 5.4 7.1 6.4 6.2 4.6 4.0 3.3 4.0 3.0 2.8 2.8 2.5 2.3 2.1 5.0 2.6 3.6 4.0 4.2 4.6 5.8 5.6 5.6 6.0 5.6 4.8 3.5 3.5 3.5 3.3 3.5 4.4 7.7 7.1 8.7 7.7 8.7 8.2 ...... 1.6 1.3 1.2 .9 3.0 7.7 10.0 10.5 11.5 11.5 12.3 12.6 12.1 12.3 12.6 10.3 11.5 11.5 10.5 6.0 13.7 3.3 10.5 13.7 13.2 15.4 14.8 15.1 8.2 8.0 6.9 6.4 7.3 8.9 9.1 9.6 9.1 8.9 9.6 8.9 8.2 9.9 9.6 2.5 10 12 13 14 11 8.7 10 11 9.4 10 10 11 11 11 11 15.1 16.0 16.0 15.7 16.3 16.0 15.7 15.7 15.7 15.7 16.0 16.0 16.0 16. 6 17.2 16.9 16.6 16.6 16.9 16.9 17.5 17.2 17.2 17.5 17.8 17.5 17.2 18.1 18.1 15.4 14.6 8.4 8.4 10 9.9 9.9 14 9.1 9.1 9.1 8.9 8.4 16 9.1 11 12 11 12 13 13 13 13 13 9.9 7.5 10 7.7 7.7 6.4 5.2 6.9 16.0 16.6 15.4 15.7 16.3 16.6 16.3 16.6 15.4 15.7 15.7 15.7 15,1 14.0 13.4 12.9 12.4 11.8 10.8 6.6 8.6 12.9 14.0 17.2 18.4 17.2 18.7 17.8 18.1 15.7 7.5 7.1 4.0 3.6 4.4 4.0 4.0 3.6 3.5 4.0 4.2 4.4 4.4 4.6 4.4 4.0 2.6 2.6 2.0 2.0 2.0 1.8 2.0 2.0 2.1 2.8 2.6 2.8 3.1 2.8 2.6 16.3 16.9 16.9 16.6 16.3 15.4 14.0 11.8 12.3 15.7 14.2 12.6 13.4 12.3 12.1 11.5 11.8 12.1 11.3 9.0 9.0 8.4 8.8 8.4 8.4 8.8 8.6 8.4 7.7 7.0 6.6 3.3 4.8 3.5 4.4 4.0 3.5 3.1 3.0 2.8 4.0 3.6 4.2 5.0 5.0 5.6 6.0 6.0 5.6 3.6 3.5 4.0 5.4 7.1 6.4 6.2 6.4 6.0 7.3 6.6 5.8 6.2 6.2 6.2 5.8 5.6 5.6 5.6 5.8 7.5 8.1 6.8 3.5 5.0 5.0 4.2 4.2 2.8 .8 .5 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 5.8 5.4 5.4 4.2 5.8 3.5 3.6 4.4 5.4 5.4 5.2 5.8 6.0 5.8 5.8 6.0 6.6 6.4 6.2 6.4 5.2 4.4 4.0 3.5 3.3 2.6 2.6 2.8 4.0 3.6 3.8 .0 .0 .0 .0 .0 .0 .0 .0 .0 4.8 2.4 3.5 6.0 6.0 3.7 6.8 6.2 5.2 5.2 5.4 5.2 5.0 6.0 4.8 5.0 4.8 4.8 4.6 5.0 5.0 5.0 3.5 3.3 2.8 2.5 2.6 2.8 2.1 1.8 2.5 2.1 2.3 2.5 2.1 2.1 2.0 2.3 2.3 2.3 2.8 3.0 3.5 3.1 2.6 2.5 2.5 2.1 2.5 3.1 2.8 3.3 3.6 5.0 4.8 3.8 3.8 5.8 4.6 5.0 5.8 5.0 .4.0 4.4 3.3 3.8 4.4 5.0 5.0 5.0 5.0 3.7 4.4 5.0 5.0 5.0 4.0 4.2 4.6 4.8 4.8 5.0 3.8 4.4 2.8 2 2.0 3 1.4 4 2.5 5 1.3 6 .7 7 2.1 8 2.8 9 3.0 10 1.8 11 .8 12 2.1 13 . 2.5 14 2.3 15 2.5 16 2.1 17 1.8 18 1.4 19 2.0 20 2.0 21 2.0 22 1.6 ?3 2.1 24 25 1.8 2.0 26 1.6 27 1.6 28 1.4 29 1.4 30 1.3 31 1913-14. 1 5.2 2 5.4 3 . 5.2 4 5.2 5 4.8 6 4.8 7 4.8 8 .. 4.8 9 1 4.8 10 3.3 11 3.8 12 4.0 13 3.5 14 3.3 15 3.5 16.. 3.8 17 3.8 IS 3.7 19 . . 3.5 20 3.5 21 3.2 22 3.2 23 3.3 24 3.5 25 .. 3.5 26 .1 .3 .5 1.0 4.0 2.1 3.3 27 3.2 28 2.8 29 , 2.8 30 3.0 31 SAN DIEGO RIVER BASIN. 105 Daily discharge, in second-feet, of Cuyamuca Water Co.'s f-ume near Lakeside, Calif, for 1907-1918— Continued. Apr. May. June. July. Aug. 8.5 13 10 8.7 13.5 8.0 K.fi 9.5 8.0 10.5 8.5 9.8 13 8.0 9.2 12 9.0 8.2 14 8.5 8.0 16 11.5 8.0 15 12.5 8.5 15 14 10 16 1.3.5 9.8- 15 13 9.2 12 9.5 8.8 12 11 7.2 14.5 10.5 7.7 14 9.5 7.0 14 U 7.2 15 8.0 5.5 14 8.2 6.8 12 8.5 7.0 n 8.0 7.2 11.5 8.0 6.8 13 7.5 6.0 13 9.0 4.9 13 12 6.5 11 10 8.8 10 10 6.0 10 10 5.8 10 9.8 5.8 14 9.2 7.0 9.8 7.2 19 16 9.0 18.5 12.5 7.2 19 11 7.2 20 11.5 8.0 19.5 12.5 6.8 18 9.5 6.5 15 11 6.8 19.5 11.5 7.0 20 10 7.8 21 10 7.0 21.5 9.2 6.5 20 10 6.2 20.5 10 6.0 19.5 13 7.2 13.5 15 6.5 19.5 17 6.5 15.5 12.5 7.0 14.5 10 7.8 21 10 9.2 20 10 9.5 21 10 9.5 22.5 9.0 6.8 21 8.0 6.0 17.5 8.0 6.5 17.5 8.5 5.3 17.5 7.5 14.5 17.5 6.8 9.5 17.5 6.0 8.2 18 6.5 7.0 17.5 6.5 6.5 7.5 5.8 3.3 3.5 7.0 7.0 7.0 7.2 7.2 7.2 7.0 7.5 7.5 7.0 7.0 7.5 7.5 7.0 6.5 7.5 3.5 5.1 3.5 6.0 6.0 6.0 6.0 6.0 6.0 6.0 5.1 5.1 5.1 2.8 3.0 2.8 3.5 4.8 3.8 3.8 3.8 4.6 3.8 5.0 2.3 1.5 1.0 1.3 1.5 .3 4.7 4.7 4.7 4.7 4.7 3.3 3.8 3.8 4.1 3.7 7.2 7.8 7.2 6.5 6.5 6.0 10 11.5 9.5 3.2 5.1 2.6 2.3 1.8 1.8 1.7 1.9 2.4 1.4 1.4 2.9 2.9 7.0 6.5 1.9 2.8 1.7 3.3 3.9 2.3 2.5 3.0 3.2 3.0 2.8 2.1 2.2 2.0 2.2 2.1 2.2 2.3 2.1 2.3 2.3 2.1 1.5 1.6 3.9 13 16.5 16.5 14.5 17 12.5 7.5 9.7 14 1.4 2.3 3.9 10 7.8 3.9 3.2 2.3 2.6 2.6 3.9 3.7 3.9 6.0 9.5 .0 .0 5.5 5.5 5.3 3.2 .0 .0 .0 .0 .0 18.5 19.5 6.3 4.7 15.5 12 16.5 21 21 17.5 .2 .0 .0 .0 .0 .0 .0 17 11.5 16.5 18 20.5 20.5 20.5 20.5 18 18 18 18 18 18 18.5 18.5 18.5 18 18 17 16.5 16 15 17.5 18.5 18.5 18.5 18.5 21 20 19 18 18.5 19.5 18.5 18 18 18.5 18.5 18 18.5 18.5 18 18 18 18 18 18 18.5 18.5 18.5 19.5 20.5 21.5 21.5 21.5 21.5 22 22 20.5 10.5 10.5 10 10 15 10 9.4 8.1 12 12.5 13 14 14.5 14.5 17.5 21 21 19.5 23.5 23.5 23.5 22.5 24 20.5 21 22.5 21.5 22 21.5 21 IS. 5 21 10 9.5 10 10.5 5.2 6.9 9.6 14 19.5 22 .22 22 22 19 16 12 8.7 6.9 9.2 9.0 9.1 9.7 22.5 19 20.5 22 23 24 24 24 23 24 24 24 23.5 23.5 23.5 23 23 23 22.5 22.5 22.5 22 22 22 22 22 20.5 20 20 19.5 19 106 SURFACE WATER OE PACIEIC SLOPE, SOUTHERN CALIFORilinA. Daily discharge, in second-feet, of Cuynmaca Water Co.^s flume near Lakeside, Calif., for 1907-1918— ^ontimied. 2.6 5.7 2.8 5.. 5 3.8 5.5 5.9 4.5 5.2 4.4 4.5 5.2 5.2 4.4 5.2 3.3 3.2 3.4 3.6 5.5 6.1 5.7 3.4 5.7 5.7 3.6 3.7 3.9 5.9 6.1 7.2 5.7 6.6 6.6 6.4 5.9 6.1 6.2 5.7 6.2 5.7 5.7 5.7 5.9 5.7 5.2 4.0 4.5 3.6 4.6 5.. 5 5.3 5,3 5.9 6.6 5.9 6.2 3.0 3.4 5.5 6.1 7.4 7.4 7.2 7.0 2-2 5.0 7.0 7.0 7.0 8,0 2.4 3.3 3.8 5.2 2.8 1-3 3.8 4.4 4.4 2,3 2.1 2.0 2.0 3.0 2.8 2.5 2.6 3.9 3.4 3.9 3.9 4.0 3.9 4.0 4.0 2.6 5.2 11 5.5 2.4 2.4 3.0 2.8 2.2 3.6 3.3 4.0 3.2 4.0 14 16. 5 10.5 7.2 5.9 5.9 1.9 1.2 1.7 1.8 3.6 3.0 3.3 3.8 3.9 3.9 3.4 3.6 3.4 3.3 3.8 3.4 3.4 2^.8 2.1 2.0 2.0 3.2 2.3 2.3 2.2 5.9 5.0 10 11.5 19 23 22 22 23 24 12.5 20 23 19.5 22.0 19.5 2.2 2.1 2.1 2.1 3.2 4.0 5.7 4.6 4.5 4.4 4.5 4.5 4.5 4.6 4.6 4.8 5.0 4.5 3.3 3:. 3 3.3 3.2 2.9 5.0 6.4 12.5 10 9.3 8.8 8.2 18 6.1 20 20 22 2.9 20 22 23 21 21 22 22 22 22 22 22 Apr. 7.4 5.5 5.2 5.5 5.5 5.7 5.5 5.5 5.9 6.2 5.2 5.5 5.2 2.9 2.7 2.8 2.8 2.6 3.3 4.0 4.0 4.0 4.0 4.8 5.7 19 20 20 17.5 19.5 20 21 19 17.5 15.5 13 11 9.3 8.6 6.6 11.5 13 13 12 12.5 12.5 15.5 11.5 May. 5.9 6.2 6.2 6.4 5.9 6.1 5.9 7.6 5.5 11.5 11 13.5 15 13 12 9.3 5.2 &.2 5.2 5.2 5.0 5.0 5.2 5.0 5.2 5.2 5.5 5.7 5.7 7.2 13 5.2 4.0 6.4 7.2 7.6 7.4 5.3 5.3 4.0 3.4 3.6 6.2 4.6 5,0 6.4 7.6 6.2 7.0 7.6 July. 8.0 9.5 9.3 8.0 7.6 6.3 5.9 8.4 9.3 9.1 10 9.3 9.3 10 10 .0 8.4 7.6 8.0 8.0 8.0 Note.— No water in flume Oct. 31, 1913, to Jan. 25, 1914. Discharge interpolated Apr. 17, May 1 and 11, 1914, as water-stage register was not in operation. Daily discharge Sept. 29-30, 1914, estimated. Oct. 1 and 2, 1914, discharge estimated. No record Nov. 19 to Dec. 23, 1914; Feb. 1 to Mar. 13, 1916; and July 31, 1917— probably no water in flume. Gage not read Aug. 9, 1918— discharge interpolated. SA'N DIEGO RIVER BASKST. 107 Monthhj discharge of Cuyamaca Water Co.' s flume near Lakeside, Calif ., for 1907-1918. Discharge in second- Maxi- Mini- 12.2 6.8 5.7 11.1 16.1 16. 1 11.1 14.0 10.3 9.2 7.0 9.2 11.6 13.4 5.0 11.4 12.5 8.2 8.7 9,2 9.7 8.0 6.3 5.5 15 13 7.1 13 13 6.9 7.8 9.2 14.2 12.5 9.9 9.7 9.0 10.7 12.0 7.6 7.8 10.4 13. 1 11.4 15.6 11. 7 8.3 8.5 9.0 2.3 5.9 .0 .0 2.2 .0 1.8 4.6 5.7 5.9 4.3 4.6 2.6 .3 .6 .0 .0 2.5 11 .7 1.1 .0 5.2 6.0 6.0 4.62 2.97 3.31 7.79 11.58 9.44 9.76 8.91 9.20 6.63 3.16 2.79 6.38 6.02 3.58 9.27 9.29 6.94 7.95 7.20 7.50 1.39 6/76 5.22 2:65 6.47 3.26 2.28 9.00 12.4 7.59 7.11 6.89 7.35 1.0 .0 2.5 .0 .0 .0 .0 4.57 7.79 2.63 1.71 4.57 8.14 9. 22 8.30 7.77 7.80 8.50 6.43 Run-off (total in acre- feet). 7.27 4. 83 4.< 6.60 9.58 5.62 11.0 8.25 3.98 3.47 5.19 3.05 165 204 464 712 562 600 548 547 188 172 392 552 571 413 489 4,620 416 311 163 398 181 140 536 762 452 437 362 272 479 162 95 281 447 287 307 406 532 346 655 507 237 213 319 181 1911-12. October November. . . . December January , February March April May June July August September... The year . 1912-13. October November. - - December... .January. .. . - February..-. March April May June - . July. August . . September . . . The year . L913-14. October November. - - December . . . Jamiary ....- February March . -" April.. May. June - . July. August . . September... The year . . . 1914-15. October - . ■ November December...-. January February.. March April.. May. June. July. August September The year . 1915-16. October November. - . - December January ...... FebruaVy..-.. March 14r-31.. April - May Jmie July. August September... Discharge in second- feet. Maxi- Mini- mum, mum. .0 3.0 3.0 1.8 14.7 16.1 15.6 14.2 10.2 8.7 4.4 16.1 11 3.3 3.1 7.5 8.7 14 16 7.5 7.3 6.6 3.6 3.0 2.0 .0 .0 4.0 15.4 IS.I 18. 7 16.9 8.1 6.8 6.3 5.0 4.6 8.5 11.5 10 24 24 22.5 17 14.5 14.5 0.0 .0 .0 .2 2.0 !o 2.1 2.5 5.2 1.8 2.8 2.6 1.8 .0 .0 .9 14.6 6.6 6.6 .0 .0 3.3 2.8 8.1 5.2 8.5 7.5 4.9 1.4 3.5 3.0 1.4 .0 1.5 5.5 19 13.5 6.0 5.3 3.9 Run-off (total in acre- feet). 0.08 .0 .13 .78 1.06 10.8 13.1 12.0 9.47 7.65 5.54 2.73 5.29 3.81 2 47 2 29 3.97 4.89 9.49 10.1 3.47 4.86 4.80 2.62 1.89 16.5 14.9 ^11.7 3.18 3.56 4.59 3.88 5.71 2.32 1.81 .99 5.68 11.4 18.0 16.8 12.7 12. 5 10.1 7.61 6.31 8.84 6.35 4.71 4.74 3.16 '"4." 27' 18.9 22.3 18.8 10.2 7.46 8.72 108 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Monthly discharge of Cuyamaca Water Co.^sjlume near Lakeside, Calif., for 1907-1918- Continued. 1916-17. October November December . . . - - January February. . March April May. June July. August September The year . . Discharge in second- i feet. Run-ofl (totalin acre- Maxi- Mini- Mean. feet). 13.5 2.6 5.24 322 7.2 5.5 6.17 367 7.4 3.0 5.51 339 8.8 1.3 4.61 283 3.9 1.7 2.79 155 9.9 2.1 4.55 280 7.4 1.9 4.55 271 7.6 5.3 6.33 389 13.5 4.0 6.64 395 11 .0 8.24 507 11 5.0 6.83 420 6.3 4.3 5.57 331 13.5 .0 5.61 4,060 1917-18. October November December January February March April May June July August September... The year. Discharge in second- feet. Maxi- Mini- mum, mum. 23 22 25 3.0 3.2 .0 2.2 5.0 2.9 6.6 6.4 3.4 5.3 7.0 4.0 8.82 Run-oflE (totalin acre- feet). 303 318 115 314 1,100 1,050 964 584 345 435 503 355 6,390 SOTTTH FORK OF SAN DIEGO RIVER NEAR ALPINE, CALIF. Location. — In NE. ^sec. 10, T. 15 S., R. 2 E., in Capitan Grande Indian Reservation, about half a mile above junction with San Diego River, and 4 miles north of Alpine, San Diego County. Drainage area. — 44.5 square miles (measured on topographic maps). Elevation. — About 800 feet above sea level. Records available. — January 1, 1913, to September 30, 1915. Gage. — Sanders & Rising "water-stage recorder on left bank about 100 feet below intake of South Fork flume. Vertical staff, fastened to outside of gage Well, was read during practically the entire year 1914-15, as water-stage recorder was not operating satisfactorily. Discharge measurements. — Made by wading or from bridge 1,500 feet below gage. Channel and control. — Solid rock and gravel ; rough; permanent. Extremes of discharge. — 1913-1915: Maximum stage recorded, 5.0 feet during morning of February 11, 1915 (discharge, 242 second-feet); no flow during several months each year. Diversions. — South Fork flume, which heads above the station, diverts water into Cuyamaca Water Co.'s flume. Regulation. — None. Accuracy. — Stage-discharge relation practically permanent. Rating curves fairly well defined. Water-stage recorder in operation only part of time; for such periods mean daily gage heights were determined by inspecting recorder graph; staff gage usually read once daily when water-stage recorder was not in operation. Daily discharge ascertained by applying mean daily gage height to rating table ; discharge for periods when gage-height record was not obtained, estimated by comparison with records of flow at adjacent stations. Records fair. Discharge measurements of South Fork of San Diego River near Alpi 1914-15. ne, Calif , for Date. Made by- Gage height. Dis- charge. Date. Made by- Gage height. Dis- charge. 1914. Jan. 27 F.C.Rbert Feet. 3.80 2.10 Sec.-ft. 129 25 1915. Feb. 3 6 Mar. 18 25 r.C. Ebert Feet. 2.30 .7 Sec.-ft. a 38 28 do do R. W. Day 6 1 t) do o Made by wading 2,000 feet below gage. SAN DIEGO RIVER BASIN. 109 Daily discharge, in second-feet, of South Fork of San Diego River near Alpine, Calif, for 1912-1915. Day. Feb. Mar. Sept. Day. i^eb. Mar. Sept. Day. Feb. Mar. Sept. 1912-13. 1. 0.05 1912-13. 11 1912-13. 21 ■ 2 12. . . 22.. 10 .1 .2 .5 .3 3 13 30 23 4 14 5.8 24 5. 15. . . . 25 16 26 7 17.. 27 . ... 8 IS 28 9. . 19 29 10. 20.. 30 31 Day. Jan. Feb. Apr. May. June. Day. Jan. Feb. Apr. May. June. 1913-14. 1 26 14 5.2 6.0 1.3 1.3 .6 .5 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1913-14. .3 .3 .3 .1 2 3 4 42 98 217 130 60 20 15 10 5 2.5 5 6 0.7 1.0 .7 .7 .5 .4 .3 .05 0.05 .05 .1 .05 .05 7 .05 .7 8.5 16 2 3 3 ^ 2*' 16 8 :::::::::::: 9 10 0.05 .05 11 14 54 39 6.8 .6 4.5 12 .05 13 14 15 .05 Day. Jan. Feb. Mar. Apr. May. June. Day. Jan. Feb. Mar. Apr. May. Jime. 1914-15. 1 15 40 35 5 .7 .5 .5 .5 .5 4.4 217 75 50 40 25 105 113 71 39 24 21 24 7.5 .5 6 3.5 4.5 3.5 2.5 2.5 '"6." 7" 44 25 9.5 24 146 71 39 18 14 9.5 3.5 1.5 .5 .2 1.5 0.1 1914-15. 16 30 40 35 20 24 44 24 24 20 16 12 11 10 1.5 0.8 .2 3.5 .4 .2 1 2 17 . 3 18 4 19 . 5 20 6 21 0.1 .5 7 22 8 23 .4 1.0 1.0 1.0 1.0 1.0 1.0 1.0 .5 9.5 14 5 .5 9 24 10 25 11 26 .1 12 27 13 28 .1 20 146 24 14 29. . . 15.... 30 44 31.. Note.— Discharge determined from fairly well-defined rating curve. Discharge Jan. 19 and 20, 1914, estimated. No gage-height record Feb. 22-27, 1914; discharge estimated by comparison with record, of flow on San Diego River and from precipitation records. No gage-height record Jan. 20, Feb. 1 and 2, 4, 6-9, 12-19, 24 and 25^ 27 and 28, Mar. 26-29, Apr. 25, May 2, 16, 20, 1915; discharge estimated. Stream dry on days for which discharge is not given. 110 SURFACE WATEE OF PACIFIC SLOPE^ SOUTHEEl^ CALIFORJSTIA. Monthly discharge of South Fork of San Diego Hirer near Alpine, Calif ., for 1913-1915. Month. Discharge in second- feet. Run-off (total iji acre- I'eet). Month. Discharge in second- feet. Run-off (total Maxi- mum. Mini- raum. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1913-14. 54 217 16 26 .05 & 3.88 21.4 1.88 1.77 .003 139 1,190 112 109 .2 1914-15. 146 217 113 44 146 .1 .5 a 6.15 29.3 14.1 2.46 13.3 .05 37S February March February March 1,630 887 April April.. . . 146 May. May . 81S .Tnnfl... 3 The year- . . The year... 217 2.41 1,650 217 5. .30 3,840 Note. — ^No flow in months for which discharge is not shown. Records represent full 5-ear. SOXJTH FORK OF CTTSrAMACA WATER CO.'S FLITME 1 FEAR ALPINE, CALIF. Location.— In NE. I sec. 10, T. 15 S., R. 2 E,, in Capitan Grande Indian Reservation, 100 feet below diversion dam, half a mile above mouth of South Fork of San Diego River, and 4 miles north of Alpine, San Diego County. Records available. — January 10, 1913, to September 30, 1915. Gage. — Sanders & Rising water-stage recorder on left side of flume 100 feet below intake. Vertical staff fastened to flume at same site is occasionally read. Discharge measurements. — Made from foot plank across Hume at gage. Channel and control. — As gage is only a short distance above wasteway, the velocity depends largely on the position of the gate. Extremes of discharge. — 1913-1915: Maximum mean daily discharge of flume, 28 second-feet May 10 and 11, 1915. Accuracy. — Stage-discharge relation not permanent owing to changes in opening of wasteway. Sufficient discharge measurements were obtained to define these changes. Mean daily gage heights determined by inspecting recorder graph. Daily discharge ascertained by applying mean daily gage height to rating tables covering short periods and by shifting- control method. Records fair. South Fork flume is a feeder for Cuyamaca Water Co.'s flume. When the water is not needed it is wasted into South Fork of San Diego River a short distance below gage in flume. Discharge measurements of South Fork of Cuyamaca Water Co .' s flum.e near Alpine, Calif., for 1913-1916. Made by— Gage Dis- Date. height. charge. Feet. Sec. -ft. 1915. 0.16 0.8 Mar. 25 .22 1.0 31 .17 .4 Apr. 7 .85 12 14 .50 5.5 22 .19 .4 28 May 5 .60 7.9 12 .40 2.8 19 26 1.20 8.7 June 2 .65 7.6 9 .89 8.6 16 .70 10.2 23 .97 9.7 30 .78 12.1 July 10 .18 23 1916. 1.10 15.8 Deo. 12 Made by- Gage height. Dis- charge. 1913. Jan. 11 16 Feb. 16 26 Mar. 15 May 13 1914. Jan. 27 28 1915. Feb. 3 6 7 18 25 Mar. 4 11 18 W. S. Post.. do F.G.Ebert. E. W.Case.. F.G.Ebert. do F.G.Ebert. D. A. McClung-. F.G.Ebert do.. R. W.Day F.C. Ebert R. W. Day do ...-do Day and MoGlmig McGlmigand Harritt.. ..do.- ..do.. ..do.. R. W. Day.- do do do do do do do D.G.McGlung.. F.G.Ebert F. G. Ebert. Feet. 0.60 .73 .60 .80 .56 .98 .45 1.50 1.43 1.15 Sec.^t. 8.1 10.4 12.9 i6.2 24 27 23 17.7 14.7 10.2 8.3 6.0 3.6 2.6 4.4 1 Previously called South Fork of San Diego flume. SAN DIEGO EIVEB BASII^r. Ill Daily discharge, in second-feet, of South Fork of Cuyamaca Water Co.'' s flume near Alpine, Calif, for 1913-1915. Bay. Oct.. Nov. Dec. .Tail. Feb, Mar. Apr. May. June. July. Aug. Sept. 1913. 1 0.0 .0 .0 .0 .0 .0 .0 .0 .0 3.7 .2 .2 .1 .1 .5 .9 .8 .4 .4 .3 .2 .2 .2 .2 .2 .2 '.2 .2 '.2 .01 .01 .01 .01 .01 .01 .01 .01 .01 .06 .06 .06 .04 .03 .02 .01 .00 .02 .04 .00 .00 .00 .00 :o8 10. 5 26 3.7 9.2 4.6 3.7 0.2 .2 .2 .2 .2 .3 .3 .3 .4 .4 .4 .3 .3 .3 .3 .3 .3 .3 .3 .4 3.7 19 8.6 4.0 14 12.*5 15 13 1.6 1.3 1.1 l.f> 1.0 1.0 .8 .6 .6 .6 .6 .4 .2 .08 .08 .08 .08 08 1 15 2.1 5.1 5.1 3.4 .4 .6 3.0 3.7 11.5 6.8 5.8 6.6 8.2 7.3 5.8 5.5 5.3 4.8 4,4 13 7.3 12 5.1 4.2 5.5 5.8 5.8 6.0 11 13.5 10.5 8.8 7.3 16.5 18.5 16 9.4 9.9 18 4.4 4.0 3.9 3.9 3.9 3.9 3.9 3.3 2.7 2.1 2.1 2.1 2.0 1.8 1.8 l.S 1.8 1.8 1.8 1.8 1.4 1.0 1.0 .9 .9 .03 .03 .00 1,0 l.O 1.0 18 16.5 13.5 8.4 5.6 5.0 3.7 4.6 3.4 3.9 6.4 7.0 9.2 9.6 5.1 3.4 3.6 4.4 4.0 3.2 2.8 2.4 1.8 1.5 1.0 .9 .9 .9 .9 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1,0 1.0 .9 .9 .6 .5 .4 .4 .4 .4 .6 1.0 1.2 1.0 .8 .5 .4 0.9 .8 .9 .6 .6 '.5 ' .5 .5 .5 .5 .5 .4 .4 .3 :1 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .8 .6 .8 .8 .6 .6 .6 .6 1.0 1.0 1.0 .9 .9 1.2 1.5 1,5 1.4 1.0 .8 .5 .4 .4 .2 .3 .5 .5 .5 .5 .5 .2 .2 0.4 .4 .5 .4 .3 .2 .1 .1 ;i .1 .1 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 0.0 2 .0 3 .0 4 .0 5 .0 6 .0 7 _ ____ .0 8:::: ■;:::■;:::: :::::; .0 9 .0 10 11 .0 12 .0 13 . 5 5 14 j 2 15 Q 16 1 .0 17 1^ i 19 20 21 22 Q 23 24 n 25 .0 26 Q 27 28 29 30 . 31 1913-14. 1 0.0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 3,7 .2 .2 .2 .2 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 0.00 .00 .00 .0^ .00 .01 .01 .01 ,01 .01 .01 .01 .01 .01 .01 .01 .01 .01 .01 .01 .01 .01 .01 .01 .01 .01 .01 .01 .01 .01 .01 .15 .08 .08 .06 .06 06 2 3 4.. 5 .15 .2 .2 .15 .08 .04 .03 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 00 S 9 10 11 • 12 lb;:;::::::::::: 18 19 20 21 22.,, 23 24 25 28 29 31 112 SURFACE WATER OF PACIFIC SLOPE, SOUTHERlI^r CALIFORNIA. Daily discharge, in secorhd-feet, of South Fork of Cuyamaca Water Co.^s flume near Alpine, Calif, for 1912-1915— Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1914-15. 1 . 0.00 .00 .00 .00 .00 .01 .01 .01 .01 .01 .03 .05 .05 .05 .05 .m .05 .05 .00 .00 1.0 3.7 .6 .4 .4 .2 1. S 1.9 2.0 2.1 15 16 18 19.5 15 8.9 8.4 6.4 6.8 8.4 16 15 14 13 12 11 10 10 12 15 12.5 18 14 10 19.5 16 13 14 12.5 15.5 14.5 20 20 21 22 23 23 22 23 25 19 13 13.5 16 14 12.5 11.5 12 13 13.5 12 8.7 9.0 8.8 9.2 10 10 9.8 10.5 10 10,5 8.0 8.1 8.2 8.4 7.2 7.0 6.8 6.4 6.0 5.6 6.7 10.5 10.5 10 11 12 13 13 13 17 16 15 16.5 16.5 16 21 22 16 19 20 24 24 25 26 27 27 28 28 27 27 24 24 24 22 22 24 21 19 18 17.5 17 17.5 17.5 17 16 15 15 14.5 15 15 14 14 13.5 13 12 10.5 9.5 9.6 9.8 9.1 8.9 8.8 S.6 7.9 7.4 6.8 6.6 6.2 5.9 5.7 5.6 5.6 5.0 4.6 4.0 3.5 3.4 3.4 3.8 3.6 3.7 3.5 3.4 3.3 3.0 2.7 2.3 1.3 .5 .5 .5 .4 .4 .3 .3 .2 .2 .2 .2 .2 .3 .4 .5 .4 .3 .3 .3 .3 0.3 .3 .3 .3 .2 .2 .2 .1 .1 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .2 .1 .0 .0 .0 2 3 4... 5 6 7 8... . • . . - 9 10 11 12 13 14 15 16... 17. . . IS 19 20 21 ... 22 ".' " 23 24 . . 25 26 27 2« 29 30 31 NoTK.— No cage-height record .Tan. 12 and 15, May 18-23, 25-30, .Time 1 and. 2, 4-6, 8-10, 12 and 13, 1913; Dec. 14, 1913, to Jan. 9, 1914, and Feb. 1-6, 1914; .Tan. 4 and 5, 11, 13, 15, 17, 20, and 21, 28, and 29, Feb. 1 and 2, 3, 12-17, 19, 24, 27, May 23 and 30, 1915; discharge estimated. Daily discharge for 1913 and 1914 computed from fairly well defined rating cnr-ves; for 1915, from fairly well defined rating curves covering short periods and by shifting-control method. Flume dry on days for which discharge is not given. Monthly discharge of South Fork of Cuyamaca Water Co.' s flume at Alpine, Calif, for 1913-1915. 1913. January 10-31. . February March April May June The period. 1913-14- November December January February March April Discharge in second- feet. Run-off (total in acre- Maxi- Mini- feet). mum. mum. 3.7 0.01 0.45 20 19 .2 3.42 190 18.5 4.2 8.91 548 18 .9 5.09 303 .9 .3 .43 26 .5 .0 .09 5 5.5 .0 .19 11 1,100 3.7 .0 0.15 9 .01 .0 .008 .5 26 .0 1.89 116 5.1 .08 1.24 69 4.4 .0 2.03 125 1.2 .4 .86 49 1913-14. May June The year 1914-15. January February March April May June July August The year.. Discharge in second- feet. 15 19.5 25 22 28 15 3.8 .3 0.2 .0 .0 6.4 8.7 5.6 14.5 3.4 .2 .0 0.72 .045 .953 13.0 15.2 11.4 21.4 8.43 1.27 .07 Run-ofl (total in feet). 722 935 678 1,320 502 78 4 4,300 Note. — Flume dry in months in which discharge is not given. SAN DIEGO EIVEE BASIN. 113 SAN VICENTE CREEK AT FOSTER, CALIF. Location. — In sec. 31, T. 14 S., R. 1. E., at old diversion dam three-eighths of a mile above Foster, San Diego County. Drainage area. — 74. 9 square miles (measured on topographic maps). Elevation. — About 500 feet above sea level. Records available. — February 2, 1914, to May 22, 1917 (discharge measurements). Daily discharge January 29 to April 4, 1915. Gage. — ^Vertical staff in two sections fastened to solid rock on right bank about 25 feet above dam. Discharge measurements. — Made from footbridge at Foster or by wading near gage. Channel and control. — Sand, gravel, and rock. The concrete dam which formed the control was destroyed by flood of January, 1916. Extremes of discharge. — 1915: Maximum stage reported, 6.5 feet February 11 (discharge, 1,190 second-feet); no flow for several months during the year. Maxi- mum discharge, flood of 1916, occurred January 27 (discharge, 18,600 second-feet). See Water-Supply Paper 426, p. 55. Diversions. — None. Regulation. — None. Accuracy. — Stage-discharge relation permanent during 1915. Rating curve well defined. Gage read to hundredths twice daily. Daily discharge ascertained by applying mean daily gage height to rating table. Records good for periods covered by gage-height record. Discharge measurements of San Vicente Creek at Foster, Calif., for 1914-1917. Date. Made by— Gage height. Dis- charge. Date. Made by- Gage height. Dis- charge. 1914. Feb 2 F. C. Ebert Feet. Sec.-ft. 1.8 12 3.5 a. 2 148 66 37 &723 6 237 98 50 27 6 102 90 72 66 28 15 15 16 13 11 13 1915. Apr. 5 9 May 17 June 1 Dec. 9 21 1916. Mar. 15 Apr. 15 May 8 June 10 July 17 1917. Jan. 22 Feb. 14 19 Mar. 12 28 Apr. 18 19 May 22 Lee and Sleppy R.W.Day.... Feet. 2.58 2.52 2.80 2.41 Sec.-ft. 10 Mar. 4 do do do 7.8 Apr. 23 May 12 F.C. Ebert 28 F. C. Ebert 3.71 3.39 3.23 5.35 4.00 3.49 D. L. Lee 5.6 1915 F. C. Ebert 05 Jan. 29 H. D. McGlashan .05 31 Feb. 1 2 do do .... do McGIashan and Ebert 33 3 K. B. Sleppy F. C. Ebert. 16 4 5 F.C. Ebert ,. do do do 5.5 .4 8 do Ellis and Ebert .05 25 Mar. 5 D. L. Lee F.C. Ebert 3.46 3.44 3.35 3.30 3.00 2.78 2.73 2.80 2.76 2.63 2.60 F. C. Ebert 6 Ebert and Keenan F. C. Ebert 25 8 do do do do McGlashan and Ebert.. 2.4 19 R.W.Day 26 26 27 do F. C. Ebert ... . 15 4.2 29 do 15 30 R. W. Day do F. C. Ebert 10 Apr. 2 R.W.Day 1.4 W. E. Keenan a Estimated. 6 Made from footbridge 2,000 feet below gage; all other measurements made by wading near gage. 142131°— 21'—wsp 447 8 114 ■ SUEFACE WATER OF PACII'lC SLOPE^ SOUTHEEIT CALIFORJ^IA. Daily discharge, in second-feet, of San Vicente Creelc at Foster, Calif,, for 1915. Day. Jan. Feb. Mar. Apr. Day. Jan. Feb. Mar. Apr. 1 37 723 237 98 50 40 30 27 20 438 783 332 115 89 90 135 ■ 178 102 90 78 • 71 67 61 54 62 60 49 44 39 35 12 11 10 10 16 92 94 81 74 96 89 78 69 62 104 .84 64 64 33 30 28 25 22 20 20 19 19 16 16 15 20 18 16 14 2 17. 3 18 4 . . . 19 5 20 6 - .-. 21 7 22 8 23 9 24 10...... 25 . 11 26 12 27 13 28 14 29 148 500 66 15. ,, 30 31 Note. — Water began flomng between 11 and 12 o'cloclc on night of Jan. 28, 1915. No gage-height record Jan. 29 to Feb. 9; Feb. 15 and 16, 26; Mar. 18 and 19, 25, 27, 31, Apr. 3; no observations after April 4. Daily discharge Jan. 29 to Feb. 9 estimated from discharge measurements and by comparison with record of flow of San Diego River at Lakeside. For other periods for which gage heights are missmg dis- charge was interpolated or estimated by comparison with record of flow at Lakeside. Monthly discharge of San Vicente Creek at Foster, Calif., for 1915. Month. Discharge in second-feet. Run-off (total in acre-feet). Maximum. Minimum. Mean. February 783 178 20 14 149 47 8,280 2,890 The period 783 14 88 11,200 MISGELIiANEOirS MEASUBEMENTS. The following miscellaneous measurements have been made in the San Diego River basin: Miscellaneous discharge measurements in San Diego River drainage hasin. Date. Stream. Locality. hdght. Dis- charge. Mar 7 1918 San Diego River .....do 1 mile above diverting dam and one-eighth mile belov/ Cedar Creek. Just above mouth of Boulder Creek, 13 miles northeast of Lakeside, NE. \ NE. J sec. 11, T. 14S., R.2E. .... do.... Feet. Sec.-ft. 7.8 Dec 16, 1912 1.1 Feb. 16,1913 do 2.4 Mar 16 1913 .do ... do .... 15 Mav 13,1913 do do do 2.4 Apr. 20,1914 May 13,1914 Apr. 7, 1915 July 10,1915 Nov 23 1905 One-fourth mile above mouth of Boulder Creek, do 4.4 do 7.3 do.. 22 do .... do . 6.6 do 1.9 May l' 1912 Mar 17 1915 do DivertiQg dam just below junction of Boulder Creek, NE. JNE. \ sec. 11, T. 14 S., R. 2 E. do 22 do . 41 Mar. 24,1915 do.. .. . do.: 26 Mar. 31,1915 do do . 23 Apr. 7, 1915 ]\Iar. 31 1915 . . do. ... do 9 .....do do Capitan Grande dam site, three-eighths mile below mouth of Chocolate Creek, and about 5 miles northeast of Lakeside, do . . 52 Apr. 2, 1915 Apr. 14,1915 Mky 1,1912 May 4, 1912 May 20,1912 33 do do 20 -do 39 do do . 34 do .....do 25 SAN DIEGO RIVER BlSIN. Miscellaneous discharge measurements in San Diego River drainage 115 -Continued. Date. Stream. Locality. Gage height. Dis- charge. May 25,1912 June 6, 1912 San Diego River do About 2^- miles east of San Diego Feet. Sec.-ft. 13 do a 1 Aug. 18.1912 Nov 7' 1917 . . do do Boulder Creek . . do Mouth .... 0.56 .36 .80 .43 5.6 1.8 19 Nov 9^ 1917 do.. Feb 8 1918 . do do Mar l' 1918 do do Apr. 2,' 1913 Feb. 16,1917 Cuvamaca Water Co. 's flurae. do... Sand Creek crossing, in NE. i sec. 22, T. 14 S., R. 2E. South Fork of San Diego River 40 3 2 Nov. 9,1917 Nov 10 1917 . do . do - - .54 .81 1.52 L37 .60 .50 .25 .29 .90 .90 1.12 1.20 1.20 1.30 .62 .84 1.08 .56 .96 1.51 3.5 8.5 22 do. . do Feb. 8, 1918 ... do . . . .. . do Apr. 14,1916 Aug. 16,1912 Aug. 20,1912 Oct. 16, 1914 do. .. Just below South Fork feeder 26 do. do do .... 115 feet below section house. Chocolate Creek, about 8 miles east of Lakeside, in SW. I sec. S, T. 15 S., R. 2 E. do.. Cuyamaca Water Co.'s gaging station just below^ Chocolate siphon, do 7.1 5.1 1 6 Oct. 17,1914 .. . do 2.0 XL 6 12 1 Jan. 28.1915 do do Feb. 6' I9ir> do... ... . do Feb. 10, 1915 do . do . 16 8 Mar. 31.1915 do .. . . . . . . . do 19 6 Apr. 7', 1915 . . do. . . do 19 1 Apr. 1^,, 1915 Dec. 12,1916 do do 22 do.. . . do 4.6 7 4 Nov. 7, 1917 do do Nov. 8, 1917 ....do . . do 12 Nov. 9, 1917 . . do do 3 6 Nov. 10,1917 .... do ...do... 9 5 Feb. 8, 1918 do do 23 Oct. 17,1914 do do Above inflow from Ei Monte pump 1 58 Do Be'ov/ inflow from El Monte pump 1 99 Apr. 3, 1915 Apr. 21,1916 do, = .. do.. 1.00 16 4 do 20 Feb. 15,1917 do . .do .35 .38 .66 .90 .44 .35 1.26 1.25 .35 1 7 Nov. 1, 1917 - . do do 1 5 Nov. 7,1917 .....do . . do 4 9 Nov. 8, 1917 . . do . . do 9 3 Nov. 9,1917 do do 2 2 Nov. 10,1917 .... do ... do 1 3 Feb. 7,1918 . do do 20 Feb. S, 1918 do do ^. 20 Sept. 7,1918 .. . do ... do 1 7 Dec. 16,1912 South Fork of San Die:iO River. do . . About one-half mile above mouth, NE. \ soc. 10, T. 15 S., R. 2E. do a 1 May 13,1913 Mar. 31,1915 do ... do . . 300 feet above mouth 16 Apr. 7, 1915 do Apr. 14,1915 do do 7 4 Apr. 14,1916 do ....do Between intake and spillway of South Fork flume. do 18 May 28,1916 1.26 .47 .12 9 "^ Feb. 16,1917 Feb. 8, 1918 do. ....do Abandoned U. S. G. S. station, no water in South Fork flume. Month 5.8 03 Mar. 7, 1918 ... do do 1 Apr. 14,1916 South Fork fliune ....do 100 feet below temporary intake . . . 15 Dec. 12,1916 .64 3.70 3.66 3. 65 .42 4 4 Nov. 7, 1917 Nov. 8, 1917 ....do . . do Entire flow of South Fork diverted into flurD.e do 1.6 1 2 Nov. 9,1917 ....do . . do 1 1 Feb. 8, 1918 ....do ....do Chocolate Creek do. New ga^e installed . . . 1 9 Mar. 7, 1918 One-fourth mile above junction with Cuya- maca Water Co. 's flume, 300 f ee^^ above mouth .... . . . 4 6 Mar. 31,1915 2 3 Apr. 7, 1915 ... do...., 1 5 Apr. 14,1915 May 6, 1912 ....do . . do 1 2 San Vicente Creek .... ....do One-half mile above Foster 2. 1 Dee. 23,1917 ... do 1 Mar. 8, 1918 ....do do 1 Mar. 14,1918 ...do ...do... 77 May 8, 1918 ....do . . do..... 1 Feb. 7, 1918 La Mesa ditch Outlet near La Mesa L97 1,90 1.87 L94 18 1 Do ...do Intake near La Mesa Intake near Grossmont 17 Feb. 8, 1918 ...do ....do . IS Do.. 16 Apr. 3, 1915 Alvarado Creek 600 feet above mouth. Flow includes waste from Cuyamaca Water Co.'s flume and leakage from I^a Mesa reserA^oir. 12 116 SURFACE WATEROF PACIFIC SLOPE, SOUTHERN CALIFORNIA. SAN DIEGUITO RIVER BASIN. GENERAL FEATURES. San Dieguito River, or Santa Ysabel Creek, as it is known from its source to the San Pasqual Valley, rises in the Volcan Mountains on the western slope of the Coast Range and flows westward through San Pasqual Valley, below which it takes its true name, and discharges into the Pacific Ocean midway between Oceanside and San Diego. Its length is 50 miles, and the maximum width of the drainage basin is about 15 miles. The total drainage area is about 340 square miles. It lies south of San Luis Rey River and north of the San Diego River basin. Numerous small tributaries enter Santa Ysabel Creek between its source and San Pasqual Valley, the largest being Black Canyon and Temescal creeks from the north and Santa Maria Creek from the south. Above San Pasqual Valley the creek maintains a light flow through- out the year, but below that point the channel is dry during the summer months. The upper part of the basin is rough, the surface being cut by many canyons. The lower part in the foothills is more rolling, with large areas of valley and high mesa land. The basin has very little timber, the principal cover being brush, grass, and a few scattered oaks. The rocks of the region are described in the report on the geology and ground-waters of the western part of San Diego County by A. J. Ellis and C. H. Lee, published by the Survey as Water- Supply Paper 446. The mean annual rainfall ranges from 10 to 15 inches along the foothills and from 20 to 40 inches in the mountains. There is no large amount of irrigation in this basin. The East and West San Pasqual ditches irrigate a small area along the river in San Pasqual Valley. A storage reservoir site exists on the main stream at Pamo Valley, below the junction of Temescal Creek with the Santa Ysabel. G AGING-STATION RECORDS. SANTA YSABEL CREEK NEAR SANTA YSABEL, CALIF. Location. — In Santa Ysabel grant, at bridge on Santa Ysabel- Warner Springs road, 1| miles north of Santa Ysabel, San Diego County. Drainage area. — 12.8 square miles (measured on topographic maps). Elevation, — About 2,950 feet above sea level. Records available. — August 29, 1913, to September 30, 1914. Discharge measure- ments only for 1914-1915. Gage. — Vertical staff fastened to left abutment of bridge. Discharge measurements. — ^Made from bridge or by wadiag. Channel and control. — Bedrock and boulders; fairly permanent. October 5, 1913, a concrete control was built across the channel just below gage. SAN DIEGUITO EIVEK BASIN. 117 Extremes of discharge.— 1913-1914: Maximum stage recorded, 2.00 feet January 27, 1914 (discharge, 84 second-feet); no flow October 1-7, 1913, and July 1 to September 30, 1914. Diversions. — A small ditch to divert water for irrigation was constructed during the summer of 1914 a short distance above the station. Regulation. — None. Accuracy. — Stage-discharge relation fairly permanent. Rating curves well defined except for flood stages. Gage read daily, except Sundays, to half-tenths. Daily discharge ascertained by applying gage height to rating table. Records good. Discharge measurements of Santa Ysabel Creeh near Santa Ysabel, Calif., for 1912-1915. Date. Made by — height. Dis- charge. Date. Made by- Gage height. Dis- charge. 1912. Nov. 18 W. J. Isbell Feet. 1.20 1.28 1.26 .78 .90 .90 .98 .99 .89 .86 .76 .68 .65 .45 .53 Scc.-jt. 1.5 2 1.5 2.1 r 10 5.2 4.1 3.2 1.2 1.1 .8 .4 a.3 .5 .4 .3 .7 .7 1.1 1.1 1.4 4.2 1914. Feb. 8 Mar. 5 14 17 Apr. 3 17 24 May 7 11 18 June 2 16 Aug. 21 1915. Feb. 8 Mar. 6 Apr. 23 May 12 June 2 29 July 10 10 28 .iug. 2 Sept. 10 W. J. Isbell do do do do do F.C. Ebert W.J. Isbell do do do do F.C. Ebert W.J. Isbell F.C. Ebert W.J. Isbell do do do F.C. Ebert W.J. Isbell do do do do Feet. 0.93 1.02 .96 .94 .93 .88 .95 .94 .93 .91 .85 .83 .57 1.04 1.30 .97 1.50 1.15 .89 .82 .84 .76 .76 .72 .82 s«../,. Dec. 10 17 do F. C. Ebert 9.3 6.1 1913. Jan 14 W J Isbell.. 6.8 5.8 31 Feb. 18 do F C. Ebert 4.1 7.2 Mar. 4 W.J. Isbell 5.7 Apr. 26 May 8 10 do do F.C. Ebert 5.0 4.4 3.1 June 15 23 do W.J. Isbell 1.8 .0 July 23 Aug. 21 29 Oct. 5 do do do F.C. Ebert 14 31 9.3 8 W. J.Isbell .72 !73 .75 .78 .78 .81 .88 55 15 Nov. 4 15 18 Nov. 22 1914. do do do do do W. J.Isbell 24 5.0 3.1 3.3 1.0 .8 • 6 23 F.C. Ebert 1.8 Daily discharge, in secondfeet. of Santa Ysabel Creek near Santa Ysabel, Calif, for 1913-14. Day. Aug. Sept. Day. Aug. Sept. Day. Aug. Sept. 1.. 1913. 0.4 .4 .3 .3 .3 .2 11. 12. 13. 14- 15. 16. 17. 18. 19- 20. 1913. 0.2 .2 ,2 .2 .2 .2 .2 .2 .2 .2 21. 22. 23- 24. 25. 26. 27. 28. 29. 30. 31. 1913. 0.2 2 .2 3 .3 4 .4 5 .4 6 .5 7 .5 8 .5 9 0.3 .3 .3 .5 10 .5 118 SURFACE WATEE OF PACIFIC SLOPE, SOUTHEillJf CALIFORNIA. Doily discliaige. in second-feet, of Santa Ysahel Creek, near Santa Ysahel. Calif., for 1913-1914— Gontmwed. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. Ma jr. June. 1913-14. j 0.0 .0 .0 .0 .0 .0 .0. .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .0 .0 .0 .0 ;§ .2 .0 .0 .0 .2 .2 .2 .2 0.2 .5 .8 .2 .8 .2 .2 .2 .2 .2 .2 .8 2.9 1.5 .8 .8 .8 .8 2,9 2.9 1.5 1.5 1.0 1.5 L5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 .8 .8 .8 1.5 .8 1.2 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 4.3 2.9 1.5 2.9 2.9 2.2 1.5 4.3 2.9 2.9 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 4.3 4.3 4.3 5.3 6.3 4.3 2.9 2.9 2.9 4.3 10 25 84 32 22 19 13 11 8.3 6.3 6.3 6.3 6.3 4.3 6.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 19 80 80 50 36 25 22 19 19 19 17 16 13 11 11 11 11 9 8.3 8.3 8.3 6.3 6.3 6.3 5.3 4.3 4.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 G. 3 6.3 6.3 8 11 8.3 8.3 8.3 6.3 6.3 6.3 6,3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 4.3 tl 4.3 6.3 6.3 6.3 8.3 6.3 6.3 6.3 6.3 6.3 6.3 8.3 8.3 6.3 8.3. 6.3' 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 5.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 4.3 2.9 2.9 2.9 2.9 3. 2.9 /i 2.9 2.9 5 G. 2.9 7 4.6 8-. . . ... 6.3 9 4.3 10 4.3 u 4.3 12 4,3 1:5 2.9 14 ^.9 15 16 2.9 2.9 1" . . . 2.9 2 9 i^;::;;: ::;:::;:;::.::;:::: 2.9 20.. 2.9 21 2.9 22 2.9 23 2.9 24.. 2.9 25 . 1.5 2f^... 1.5 1.5 2S 1.5 28 .. 1.5 30 1.5 31 Note. —Previous to Oct. 8, 1913, gage was read only occasionally. No gage-heLgiit record for Sundays; discliarge interpolated or estimated by comparison witli record of flov/ at Mesa Grande station. Monthly discharge of Santa Ysahel Creeh near Santa Ysahel, Calif ., for 1913-14. Month. Discharge in second- feet. Kun-off (total in acre- feet). Month. Discharge in second- feet. Run-off (total in Maxi- mum. S: «-- Maxi- mum. Mini- mum. Mean. acre- feet). 1913. September 0.5 i 0. 2 1 0. 32 19 1913-14— Con. February March A pril 80 17 8.3 8.3 6.3 4.3 4.3 4.3 2.9 1.5 16.7 8.17 6.37 5.34 2.98 928 502 379 1913-14 .2 2.9 4.3 84 . i .10 .2 1.10 .!^ ' 1.7S 1.5 ' S.68 6 66 109 . 534 October May 328 177 December January The year.. 84 .0 4.18 3,030 Note.— No flow July to September, 1914. SANTA YSABEL CREEK NEAR MESA GRANDE, CALIF. Location. — In NW. I sec. 21, T. 12 S., R. 2 E., at Sutherland dam site, about 1 mile below Sutherland, 1^ miles above mouth of Black Canyon Creek, and 4| miles southwest of Mesa Grande, San Diego County. Drainage area. — 53.4 square miles (measured on topographic maps). Elevation. — About 1,900 feet above sea level. Records available. — December 29. 1912, 'to September 30, 1918. Gage. — Friez water-stage recorder on right bank just above Sutherland dam site in- stalled August 27, 1913. Before this date, record from staff gage and Sanders & Rising water-stage recorder at same site and datum. Gage datum was lowered 0.31 foot April 21, 1916, and 0.21 foot October 12, 191G. SAN DIEGUITO RIVER BASIJT. 119 Discharge measurements. — Made from cable at gage or by wading. Channel and control. — Sand ; sliifting. A concrete control was constructed at an outcrop of bedrock 20 feet below gage. It was damaged by the flood of 1916 and repaired in June and November 6-9, 1916. (See PL VI, A, p. 17.) Both banks are high, covered with brush, and not subject to overflow. Extremes op discharge. — 1912-1918: Maximum stage recorded, 11.0 feet January 27, 1916 (discharge, 21,100 second-feet); no flow October 1 to 2, 1913, August 12 to 29, and September 6 to 13, 1914. Diversions. — No large diversions above the station. Regulation. — None. Accuracy. — Stage-discharge relation not permanent, as sand collects at artificial con- trol. Rating curves covering short periods are fairly well defined. Daily dis- charge ascertained by applying to the rating table mean daily gage height obtained by inspecting recorder graph, or, for days of considerable fluctuation, by aver- aging the hourly discharge; discharge for period for which rating curves were not available determined by shifting-control method or interpolated between discharge measurements . Records goods. Discharge measurements of Santa Ysahel Creek near Mesa Grande, Calif., for 1912-1918. Date. Made by- Gage height. Dis- charge. Date. Made by- Gage height. Dis- charge. 1912. Feet. Sec.-tt. 1914. Feet. Sec.-ft. Dec. 8 E W. Case 3.0 Jam. 22 F. C. Ebert 0.55 5.0 17 F. C. Ebert 2.9 28 Feb. 4 R.W.Day 1.41 .82 88 do 22 1913. 11 do .72 15 Jan. 17 E. W. Case 0.70 16 18 do .79 15 Feb. 7 do, .51 6.7 19 do... 1.44 105 14 (Jo .49 5.2 20 do L21 79 15 do .48 4.9 21 do 2.95 481 16 do .47 4.6 22 do.. 2.36 243 IS F. C. Ebei-t .47 .50 4.1 5.2 26 Mar 5 do F C Ebert L45 .93 66 20 R W Day 40 26 .81 26 11 R. W.Dav .83 24 Mar. 5 do, .71 19 18 .....do....: .76 19 13 do .76 23 25 .....do. .75 16 18 F.C. Ebert > .66 14 Apr. 1 do .77 19 26 R. V/. Dav .76 .72 23 18 8 15 .....do do.... .73 .67 15 Apr. 3 do....: 12 10 do... .63 12 23 F.C. Ebert .78 22 18 do .69 .60 17 9.5 29 May 6 R.W.Day... .79 .71 19 23 do., 13 30 do .55 8.0 13 do .65 11 May 19 do...... .49 4.8 Dec. 14 D. A. McCluBg .47 3.3 29 do .51 5.7 June 6 do. .45 3.7 1915. 11 do.... .48 4.0 Jan. 18 D.A.MeClung .46 2.7 17 F. C. Ebert .37 .31 .26 2.4 L5 1.1 25 Feb. 22 Mar. 8 do R. W. Dav .73 1.40 L38 13 25 R, W.Day 84 July 2 do.... .do..,.: 100 9 do.,.,..... .14 .2 15 .....do.. 1.19 60 16 do............. .13 .2 22 do LOS 51 23 do..., .15 .3 Apr. 5 do 1.07 31 29 do.... F. C. Ebert .22 .15 .6 .1 ^ 12 Apr. 19 May 11 25 .91 .90 25 Aug. 27 Oct. 1 R. W. Day 25 R. W. Dav .0 .3 W. J. Isbeil L69 L27 129 8 do....: .19 78 15 do .18 .2 June 1 (Jo.,., Lll 63 25 do .13 .1 9 (Jo .96 39 29 .18 .3 29 do..., .81 17 Nov. 5 do. .27 .8 July 13 do..... .66 10 12 do .28 .9 20 do .65 9.9 18 do .35 L7 27 do .61 7.3 26 do..... .40 2.2 Aug. 3 do .56 6.4 Dec. 3 do .41 2.2 10 do .49 3.4 10 do .37 L8 17 do .49 3.4 17 do...... .40 2.2 24 do .47 3.4 24 .... do . .53 4.5 31 .....do .46 3.2 31 do .56 5.1 Sept. 14 do .51 4.7 21 do .45 2.9 1914. 28 do... .46 2.9 Jan. 3 R. W.Dav... .48 3.8 Oct. 5 do .46 1.7 7 do .45 2.7 12 do .45 2.9 14 do .43 2.9 20 do .37 1.8 21 do .57 5.9 26 do .38 L8 120 SURFACE WATER 0:F'PACIEIC SLOPE, SOUTHERN CALIFORETIA. Discharge measurements of Santa Ysabel Creek near Mesa Grande, Calif. , for 1912- 1918— Continued. Date. Made by — height. Dis- charge. Date. Made by — Gage height. Dis- charge. 1915. Nov. 2 W. J. Isbell Feet. 0.40 .52 .48 .56 .52 .55 1.04 ,96 1.02 .73 .82 .72 .73 .67 .65 .44 .36 .60 .48 .63 .63 .62 .63 .60 .67 .56 1.16 1.14 1.37 1.34 1.35 Sec.-ft. 1.9 3.6 3.5 7.0 5.2 5.2 35 120 123 85 96 72 93 52 50 32 37 32 26 22 18 18 13 6.7 5.7 2.7 8.8 6.2 5.8 7.8 6.2 1917. Jan. 2 21 Feb. 13 18 23 27 Mar. 7 9 20 27 Apr. 13 19 May 21 June 7 29 Aug. 20 Oct. 1 Nov. 19 Dec. 9 24 31 1918. Mar. 8 14 31 May 6 Aug. 13 30 D. A McClung Feet. 1.41 1.86 1.50 1.73 2.78 1.97 1.70 1.72 1.63 1.58 1.52 1.67 1.48 1.42 1.30 1.16 1.10 1.20 1.22 1.23 1.22 1.-68 1.87 1.42 1.34 1.15 1.12 Sec.-^L 16 do do F. C. Ebert F. C. Ebert 54 30 Dec. 6 McClung and Dubois.. . F. C. Ebert 17 42 11 do W. J. Isbell T, B. Dubois . 345 21 McClung and Dubois.. . D. A. McClung... 91 W. J. Isbell 41 1916. F.C. Ebert 45 Jan. 11 D. A. McClung 32 Feb. 18 Day and Case F. C. Ebert 23 Mai-. 7 17 do R. W. Day.. McClung and Holley . . . McGlashan and Ebert.. F. C. Ebert 23 35 29 do W. J. Isbell : . . 16 Apr. 5 12 25 May 2 D. A. McClung 16 do do do do do do do do do do do F. C. Ebert do McClung and Rogers . . . D. A. McClung 6.6 1.5 .6 9 16 23 30 do do do F. C. Ebert. .. 1.4 1.9 2.8 2.8 June 6 13 20 F. C. Ebert . . . 35 July 11 19 do D. A. McClung 79 19 Aug. 10 Sept. 1 Oct. 10 W. J. Isbell - . F.C. Ebert. .. 12 do S. L. R. Case D. A. McClung . 1.6 do .4 19 W. J.Isbell Dee. 1 9 Isbell and McClung. . . F. C. Ebert 21 McClung and Case Daily discharge, in second-feet, of Santa Ysabel CreeJc near Mesa Grande, Calif., for 1912- 1918. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1912-13. ^ 2.8 2.8 2.8 2.8 2.8 2.5 2.5 3 4 6 4 6 4.5 4.5 5 42 17 10 7.5 5 5 5 3.9 3 9 5 5 5 3.9 3.9 3.9 3.9 5 5 5 5 8 5 10 5 5 5 5 5 5 5 3.9 3.9 3.9 4 5 10 80 17 15 91 26 61 31 31 31 31 24 17 20 23 26 26 26 25 24 22 21 19 17 15 14 14 17 22 26 31 61 26 22 22 22 22 17 17 17 17 17 17 16 16 16 15 14 14 10 10 10 10 10 12 14 17 10 10 10 10 10 10 7.5 7.5 7.5 n 7.5 7.5 7.5 7.5 7.5 7.5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 4.5 4 3.9 3.9 3.9 3.9 3.9 5 2.8 2.8 2.8 2.8 2.5 2.2 3 3.9 2.8 1.5 1.5 3.9 5 1.5 3 5 4.5 4 3.9 1.5 .8 1.2 1.5 2.8 1.6 .5 .5 •4 •J .5 0.4 .3 .3 .3 .2 .2 .1 .1 .1 .1 .1 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .1 .2 .3 .4 .4 .2 .2 .4 0.4 2... .4 3 .4 4 .2 5 .. .. .1 6 .1 7 .1 8 .. .. 3.0 .0 9 .0 10 . .. .0 11 . .0 12 .0 13 .0 14 .. .0 15 .0 16 .0 17 2.9 .0 18 .0 19 .0 20 .0 21 .0 22 .... .0 23 .0 24 .0 25 .0 26 .... .0 27 .0 28 .0 29 2.8 2.8 2.8 .0 30 .0 31 .0 SAN DIEGUITO RIVER BASIN. 121 Daily discharge, in second-feet, of Santa Ysabel Oreeh near Mesa Grande, Calif., for 1912- 1918— Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1913-14. 1 0.0 .0 .05 .05 .05 .1 .2 .3 .4 .4 .4 .3 .3 .3 .3 .3 .3 .3 .3 ,.2 .2 .2 .2 .3 .3 .3 .2 .2 .3 .3 .4 .2 .5 .8 1.1 1.4 1.4 1.4 1.4 1.4 1.1 .9 .8 .5 .5 .5 .5 .5 .6 .7 .5 .8 1.3 1.2 .8 .5 .4 .4 .4 .4 .5 .8 0.4 .7 .9 .9 .9 .9 .9 .9 .9 1.0 1.0 1.0 1.3 1.3 1.3 1.4 1.5 1.7 1.5 4.4 4.8 4.4 3.2 2.5 2.2 2.2 2.2 2.2 2.2 2.2 .9 .9 1.0 .8 .7 .5 .5 .5 1.3 2.7 2.5 2.3 2.1 1.9 1.7 1.5 1.3 1.1 .8 .7 .7 i!i 1.3 1.3 1.4 1.4 1.4 1.6 1.6 2.4 2.4 2.4 2.4 2.4 2.4 2.2 2.2 2.1 1.9 1.9 1.9 2.0 2.1 2.1 2.2 2.2 2.2 2.2 3.0 3.9 5.0 9.1 4.6 4.6 6.2 5.5 5.3 5.0 5.3 5.3 2.7 4.1 3.4 3.4 3.6 3.4 3.2 2.7 2.7 2.5 3.0 6.2 4.8 3.2 3.0 3.2 5.3 6.7 7.6 7.6 5.5 5.7 6.0 5.5 5.3 5.3 4.6 3.9 3.9 3.9 4.1 • 5.0 5.0 4.4 4.1 3.9 3.6 3.0 2.9 2.9 2.9 2.9 2.9 2.9 2.7 3.6 9.1 9.6 9.1 14 • 8.6 5.5 5.0 5.7 5.0 13 270 800 154 122 40 33 4.1 4.1 4,4 4.4 4.8 4.8 4.6 4.8 5.5 5.3 3.4 3.4 3.4 3.6 3.4 3.4 3.6 3.2 3.2 3.2 3.4 14 7.6 5.7 10 10 8.1 26 471 408 78 29 25 24 22 22 20 19 18 17 16 15 13 12 12 11 10 10 9 205 264 593 175 75 50 32 28 28 31 60 278 227 107 66 53 45 42 52 455 571 332 181 121 91 112 134 130 127 192 130 93 84 112 192 136 125 123 32 31 34 36 37 33 31 27 25 23 24 24 22 22 21 20 19 19 19 18 17 17 16 16 16 17 18 18 19 35 25 181 215 136 130 120 110 105 100 94 115 96 88 78 69 62 62 60 58 57 53 52 51 48 47 44 43 40 40 42 40 38 17 17 16 16 20 18 17 15 15 15 17 15 15 14 12 12 11 10 8.5 7 10 32 30 18 16 15 16 15 21 24 37 35 34 32 31 34 36 37 35 26 27 25 25 25 30 34 29 27 25 22 60 107 63 69 52 44 44 44 60 182 20 20 18 17 15 14 12 12 12 12 12 11 11 11 11 11 11 10 10 9.4 8.9 8.9 8.4 8.4 8.4 8.4 8.4 8.1 7.7 7.7 7.0 255 379 263 240 540 313 251 214 180 153 125 116 108 101 99 81 98 1.36 106 96 91 87 77 78 75 73 70 66 66 65 62 7.0 7.0 7.4 7.0 7.4 7.4 11 14 6.7 6.0 5.7 5.0 4.8 4.8 4.6 4.6 4.4 4.2 4.2 4.2 4.2 4.0 3.8 3.8 3.6 3.6 3,0 2.4 1.5 1.0 60 56 55 54 51 47 44 41 41 39 38 37 36 35 34 31 30 29 28 28 27 26 25 23 22 21 21 19 17 16 1.0 1.0 1.1 1.1 1.0 .9 1.2 1.3 1.2 1.0 1.0 1.1 1.2 1.4 1.4 1.2 .9 .7 .6 .5 .6 .2 '.2 .2 13 13 14 14 14 14 13 12 12 11 11 10 10 10 10 10 10 10 10 9.5 8 8 8 7.5 7.5 7.5 7.5 6.5 6.5 6.5 7 0.1 .0 .0 .0 .0 .0 .0 .0 .0 .0 .2 .2 6.5 6.5 6.5 5 4.5 4.5 3.5 3 3.5 3.5 3.5 3 3 2.5 2.5 3 3.5 3.5 3 3 3 2 1.5 2.5 3 5.5 7 4.5 4 3.5 3 0.4 2 ,4 3 ... .4 4 .2 5 .1 6 .0 7 .0 8 .0 9 .0 10 .0 11 .0 12 .0 13 .0 14 .3 15 .3 16 .3 17 .2 18 .1 19 .1 20 .1 21 .1 22 .2 23 .2 24 .2 25 .1 26 .2 27 . ... .6 28 .6 29 .4 30 .2 31 1914-15. 1 3 2 3 3 3 4 3.5 5 3.5 6 3.5 3.5 8 3.5 9 3.5 10 3.5 11 2.5 12 .5 13 1.5 14 . 4 15 4.5 16 4.5 17 4 18 1 19 3 20 3 21 3 22 3 23 3 24 3 25 3 26 3 27 3 28 3 29 3 30 3 31 122 SURFACE WATER OF PACIFIC SLOPE^ SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Santa Ysabel Creek near Mesa Grande. Calif., for 1912-^ :?Qi^— Continued. Day. Oct. Nov. Dee. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1915-16. 1.. 2.6 2.4 2.2 2.0 1.7 1.8 2.0 2.1 2.3 2.5 2.7 2.9 2.8 2.7 2.5 2.4 2.3 2.1 2.0 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.9 1.9 20 30 11 9 8.5 11 6.5 7 7.5 9 8 13 5.5 5.5 4.8 4.6 5 5.5 5.5 5 5 4.8 5.5 6.5 4.8 4.6 5.5 5.5 6.5 6.5 1.9 2.0 2.0 2.0 2.2 3.0 6 4.9 4.3 6.5 6.5 5.5 4.9 4.3 4.0 4.0 3.4 3.2 3.2 3.2 3.4 3.6 3.8 3.6 3.4 3.4 3.2 3.2 3.2 3.2 5.5 5.5 5.5 5.5 9.5 9 8 6 5.5 6.5 6.5 5.5 6 5 5.5 5.5 5.5 5 5.5 6 7 7.5 8 7.0 7.5 6 3.2 3.2 3.2 12 13 6.5 6 6 5.5 5 5 5 Ps 'I 6.5 6 5 5 5 5 6 6.5 6 6 6 7.5 10 12 6.5 9 11 11 8 8.5 7.5 6 6.5 5^5 5.5 6.5 6 5.5 6.5 6.5 6.5 7.5 7.5 7 8 31 48 27 23 14 14 14 14 4.0 10 12 9 10 10 9.5 8 18 62 45 19 15 36 54 405 4,130 4,200 2,580 1,280 500 480 225 200 416 406 10, 800 4,720 1,520 800 560 13 12 88 39 21 16 13 11 11 10 12 32 19 35 35 23 39 72 72 54 44 36 32 29 29 28 31 30 28 27 493 461 400 341 313 287 262 239 206 196 186 166 157 148 130 130 130 122 122 114 139 139 122 107 107 122 157 122 200 25 25 17 18 18 17 16 17 17 18 17 16 16 15 50 55 77 86 64 204 294 162 165 118 96 83 240 195 125 115 330 150 123 95 90 85 150 140 125 120 110 100 85 83 84 110 113 110 204 127 122 119 107 100 96 93 89 72 65 54 54 54 51 45 41 46 70 61 52 48 50 48 42 40 38 35 35 30 27 25 25 25 24 23 21 21 21 22 86. 82 79 75 72 75 78 81 84 87 90 93 72 70 75 74 67 64 62 59 57 61 58 56 52 51 51 51 51 51 20 19 18 15 14 15 16 15 31 31 21 19 19 19 21 86 68 42 35 28 27 26 24 22 20 20 27 28 27 22 50 50 45 42 41 40 38 35 32 33 33 34 34 35 36 37 36 35 35 34 33 33 32 31 30 30 29 28 27 26 26 19 18 16 15 16 16 17 22 22 21 19 16 16 15 14 14 14 28 22 19 17 17 19 36 43 34 29 28 29 30 27 25 24 24 23 22 22 22 21 20 20 19 19 18 18 18 18 18 18 18 18 18 18 18 17 17 16 16 16 21 20 21 21 21 21 21 21 20 15 14 14 13 13 12 12 13 13 12 8.5 6 6 7.5 7.5 7.5 6 6 4.8 3.4 15 15 15 14 14 14 14 13 13 13 13 12 11 10 9 8 7.5 7 6.5 6.5 6.5 6.5 6.5 6.5 6 6 6 6 6 6 6 4.3 5.5 7 8 7 7 6.5 6.5 6 5 2.5 4.8 6 5.5 6 5 4.8 2.1 3.8 3.4 3.4 6.5 5 4.8 6.5 6 5.5 5.5 6 6 6 6 6 5.5 5.5 5.5 5.5 5.5 5.5 1.8 1.8 1.6 1.4 2.0 4.9 3.3 3.5 5.3 5.3 4.9 2.9 2.7 3.5 4.9 5,5 5.5 5.5 4.2 4.2 3.5 4.8 4.8 4.8 4.8 4.8 3.8 3.4 3.0 2.5 2.5 3.4 3.4 3.'0 2.3 2.5 2.3 2.3 2.3 2.3 2.5 1.9 2.3 2.1 2.3 2.1 1.9 .8 .6 .5 .5 3.3 3 3 3 3 9 4 4 2 3.9 3 9 6 7 3 9 8 4 2 9 4 6 10... 4.6 11 3 5 12 3 1 13 2 7 14 2.7 If) 8 l'^, 6 5 17 4 6 18 .... 9 19 12 20 10 21 10 22 11 2'i 11 •^l ..-- 12 25 9 5 26 6 5 27 . 6.5 2S - - - - 7 5 20 18 30 - . - - 18 31 ' - - 1916-17. 5 2 .5 3 3.4 4 1.4 5 2.5 6 2.5 2.3 8 9.. 2.3 2.1 10 1.9 11 1.9 12 1.9 13 . ... 2.1 14 2.3 15 1.7 16 1.6 17 1.6 18 1.6 19 1.7 20 12 21 3.0 22 1.9 23 2.1 24 2.5 25 2.3 26 . .. 1.9 27 1.4 28 1.4 29 1.4 30 . 1.7 31 SAN DIEGUITO EIVEE BASIN ^ 123 Daily discharge, in second-feet , of Santa Ysahel Creek near Mesa Grande, Calif. , for 1912- 1918 — Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June, July. Aug. Sept. 1917-18. 1 1.0 1.0 .6 .5 .5 .9 .7 .7 .7 .9 1.2 1.2 1.3 1.8 1.5 2.2 2.9 2.2 1.2 1.2 1.0 1.1 1.1 1.0 1.1 1.1 1.3 1.8 1.4 1.2 1.0 0.9 .9 .7 1.1 1.8 4.6 5 4.0 3.2 2.9 2.6 2.2 2.2 2.6 2.9 2.9 2.2 1.4 1.4 2.2 1.8 2.6 3.2 4.0 4.0 3.2 3.2 2.9 2.9 2.9 2.9 2.9 2.9 2.2 2.2 2.6 2.6 1.5 1.4 1.4 1.8 1.8 2.6 1.8 1.5 1.5 1.5 1.8 1.8 1.8 2.2 2.9 2.2 2.6 2.2 2.2 1.8 2.2 1.8 2.2 1.8 2.2 2.2 1.5 1.5 1.5 1.8 1.8 2.2 2.9 2.9 2.9 2.9 9 4.0 3.6 2.9 2.9 2.2 3.2 2.9 2.9 2.6 2.2 2.2 13 7 5.5 5 4.3 4.0 3.2 3.2 3.2 3.2 3.2 2.9 3.6 2.9 2.6 2.9 2.9 3.2 3.2 3.6 3.6 3.6 4.6 18 11 7.5 5.5 27 13 8.5 9.5 8 7 5.5 5 4.6 4.6 4.3 4.3 7 36 52 14 19 204 671 208 78 56 38 34 30 68 93 59 51 45 43 34 32 29 24 22 21 20 21 22 22 21 21 20 19 17 18 17 17 18 20 19 17 16 15 14 13 12 11 12 13 14 14 15 16 16 15 14 12 12 12 12 12 12 12 12 14 13 12 12 12 12 12 12 12 12 12 12 11 10 10 9.5 9.5 10 10 14 22 13 12 10 9.5 9.5 9.5 9 8.5 9 8.5 9 8.5 6.5 3.5 4.7 3.5 6.5 7.5 6 6 7.5 7 6.5 7.5 7 6 5.5 6.5 6 5.5 5.5 4.1 3.5 3.5 3.5 3.0 3.5 3.5 4.1 .3 .3 .3 .3 .3 .3 .2 2.0 3.0 2.0 1.5 1.0 1.0 .2. .2 .2 .2 .2 .3 .2 .2 0.5 .5 .3 .5 .7 1.0 3.5 4.1 2.0 2.5 1.0 1.5 2.0 3.0 4.1 4.1 3.5 2.5 1.5 .3 .3 .2 .2 .2 .2 3! 5 1.0 .5 1.5 2.5 1.5 2 .7 3 .2 4 .. .2 5 .2 6 .2 7 .1 8 .2 9 .2 10 .2 11... .5 12 3.0 13^ 5.5 14 6 15 - 3.5 16 3.0 17 2.5 18 2.0 19 2.5 20 1.0 21 1.0 22 2.5 23 3.0 24 . ... 1.5 25 .7 26 .5 27 .5 28 .3 29 .3 30 .4 31 Note.— Daily discharge determined as follows: 1912-1915, Dec. 29, 1912, to Jan. 25, 1914, from welJ-defined rating curve; Jan, 26 to Apr, 29, 1914, from rating curves covering short periods and by shifting-control method; Apr. 30, 1914, to Mar. 2, 1915, from well-defined rating curves; Mar. 3 to Sept. 30^ 1915, from rating curves covering short periods and by shifting-control method. 1916: Shifting-control method used Oct. 1-25, 1935, Dec. 4-14, Mar. 30 to Apr. 12, and May 10 to Aug. 10. .Tan. 16-31, computed from hydrograph; Oct. 1-11, estimated from discharge measurements; Nov. 6-9, interpolated. Staff gage read Jan. 28 to Feb. 28, and Aug. 11 to Sept. 21, no record Mar. 1-16; discharge esti- mated from record of flow on San Luis Rey River near Mesa Grande. Control repaired Nov. 6-9; discharge interpolated. Staff gage read Oct. 7-12, 1917, and June 8-14, 1918. Hourly discharge averaged for March 7, 10-13, and 19,1918. Monthly discharge of Santa Ysabel Creek near Mesa Grande, Calif, for 1913-191S. Month. Discharge in second-feet. Run-ofr (total in acre-feet). Maximum. Minimum. Mean. Januarv 1913. 42 91 61 17 7.5 5 2.8 .4 .4 2.5 3.9 14 7.5 5 1.5 .4 .0 .0 6.00 15.6 23.60 11 7.42 3.58 .65 .14 .06 369 Februarv 866 March.." 1 450 April '7O8 Mav 456 June 213 July. 40 August 9 September 4 The period 4 120 124 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Monthly discharge of Santa Ysahel Creek near Mesa Grande, Calif., for 1913-1918 — Con. Month. Discharge in second-feet. Run-oflE (total in Maximum. Minimum. Mean. acre-feet). 1913-14. October 0.4 4.8 9.1 800 593 37 32 20 14 1.4 .2 .6 0.0 .4 1.9 2.7 9 16 7 7 1 .1 .0 .0 0.24 1.76 3.37 50.2 63.9 23.6 16.2 11.3 5.28 .74 .05 .19 15 November ... 105 December 207 January 3,090 February 3,550 March 1,450 April . . . 964 May 695 314 July 46 August 3 September 11 The year 890 .0 14.4 10,400 1914-15. October 1.4 2.7 7.6 471 571 215 182 540 60 14 7 4.5 .2 .5 2.5 3.2 42 38 22 62 16 6.5 1.5 .5 .78 1.27 4.39 36.2 156 79.8 44.4 150 34.4 10.0 3.77 3.07 48 November 76 December 270 January 2,230 February. . . . 8,660 March 4,910 April 2,640 May 9,220 June 2,050 July ■. . 615 August . 232 September 183 The year 571 .2 4.3.0 31, 100 1915-16. October .... 2.9 6.5 18 10,800 493 330 93 50 25 15 6 18 1.7 1.9 3.2 4.0 107 83 51 26 16 6 1.4 2.7 2.12 3.70 7.13 1,080 201 127 68.8 34.8 19.2 9.63 4.36 7.06 130 November 220 December .. 438 January 66,400 February 11,600 March 7,810 April 4,090 May 2,140 June 1,140 July 592 August 268 September 420 The year 10,800 1.4 131 95,200 1916-17. October 30 9.5 48 88 294 72 86 43 21 8 4.8 12 4.6 5 5.5 9 15 21 14 14 3.4 2.1 .5 .5 7.87 6.43 11.4 30.6 62.1 40.8 26.5 21.5 13.0 5.48 2.71 2.25 484 November 383 December 701 January 1,880 February 3,450 March 2,510 April 1,580 May 1,320 June 774 July 337 August 167 September 134 The year 294 .5 19.0 13,700 1917-18. October 2.9 5 2.9 13 27 671 22 22 10 5.5 4.1 6 .5 l".4 1.5 2.6 4.3 11 9.5 3.5 .2 .2 .1 1.20 2.61 2.08 3.60 6.29 64.9 16.6 12.1 7.14 1.57 1.59 1.46 73.8 November 155 December 128 January 221 February 349 March 3,990 April 988 May 744 June 425 July 96.5 August 97.8 September 86.9 671 .1 10.2 7,360 SAN DIEGUITO RIVEiT BASIN. 125 SANTA YSABEL CREEK NEAR RAMONA, CALIF. Location.— In NE. i NE. 1 sec. 27, T. 12 S., R. 1 E., at Pamo dam site, below Pamo Valley, li miles below mouth of Temescal Creek, 4| miles north of Ramona, San Diego County, and about 4 J miles above site of station maintained at mouth of canyon near Escondido from 1906 to 1912. Previous to February 1, 1916, station was maintained at Pamo Camp, half a mile above dam site. Drainage area. — 110 square miles (measured on topographic maps). Elevation. — About 900 feet above sea level. Records available.— February 5, 1912, to September 30, 1918. Gage. — Leitz water-stage recorder, with concrete well and house, on left bank afc dam site. Two vertical staffs have been used : " C " is fastened to outside of con- crete well and is at same datum as water-stage recorder; "B " is fastened to solid rock on left bank a short distance above "C" and is at different datum. Staff at original station above dam site was in four sections on left bank, a short vertical section at control being read at extremely low water. Discharge measurements. — Made from cable about 1,000 feet above gage at dam site or by wading. The cable at Pamo Camp was at gage. Channel AND CONTROL. — Sand; somewhat shifting. Banks high and clean. Channel straight for 200 feet above and 600 feet below gage. Concrete control, built across channel just below gage, was completed December 8, 1916, and was destroyed by high water March 12, 1918. It was only partly effective during high water, as a large boulder in the channel a few feet upstream caused a sand bar to form at control. This boulder was removed in September, 1917. November 19, 1912, a concrete control was built about 30 feet below gage at Pamo Camp. (See PI. V, C, p; 16.) It was destroyed by the flood January, 1916. Extremes of discharge. — 1912-1918: Maximum stage recorded, 14.0 feet January 27, 1916 (discharge, 28,400 second-feet); minimum stage recorded, 0.74 foot October 1-6, 1915 (discharge, 0.1 second-foot). Diversions. — No large diversions above the station. Water is diverted from Santa Ysabel Creek near the mouth of the canyon, 4 J miles below the station, by East San Pasqual ditch, which takes out on left bank, and West San Pasqual ditch, which takes out on right bank and below intake of the East San Pasqual. Regulation. — None. Accuracy. — Stage-discharge relation not permanent. The concrete control at Pamo Camp, except for short periods after high water, was very effective. The rating curves for gage at Pamo Camp are well defined; those for new gage are fairly well defined. Staff gage read to hundredths three times daily. Water-stage recorder in operation January 22 to June 30, 1917; mean daily gage height obtained by inspecting recorder graph. Daily discharge ascertained by applying mean daily gage height to rating tables, or, for periods not covered by rating curves, by shifting-control method and by interpolation between discharge measurements when there was little change in stage. Records for 1916, 1917, and 1918 fair; earlier records good. 126 SURFACE WATER OF PACIFIC SLOPE, SOUTHERIT CALIFORJSTIA. Discharge measureme7its of Santa Ysabel Creehnear Bamona, Calif., for 191^-1918. Date. Made by— Gage height. Dis- charge. Date. Made by— height. Dis- charge. 1912. Feb. 5 H. L. Da\is. . . Feet. 0.30 .30 .32 .28 .94 .62 .60 .94 1.01 .85 2.22 1.70 1.72 1.68 .84 .92 .50 .10 - .10 .06 .99 1.01 1.09 1.24 1.25 1.54 1.43 1.31 1.23 1.22 1.23 2.35 2.00 1.74 2.27 1.47 1.39 1.39 1.39 1.46 1.93 1.44 1.36 1.28 1.33 1.27 1.25 1.24 1.19 1.17 1.18 1.16 1.12 1.11 1.11 1.00 .71 .70 .68 .75 .72 .67 .79 1.47 1.15 1.00 1.21 1.18 1.00 .99 .99 .99 1.10 1.25 1.32 1.18 Sec. ft. 3.3 3.8 3.8 3.0 49 21 18 50 50 41 206 154 154 141 53 54 21 1.4 O.05 2.2 2.4 2.5 3.5 9.2 8.5 40 22 13 6.9 6.7 6.9 168 97 56 172 27 21 19 18 25 106 24 17 15 13 9.5 6.6 6.8 5.3 4.6 4.8 4.7 2.6 1.7 1.4 b'.l 6.1 .2 6.05 6.1 .2 25 5.7 1.7 7.2 6.3 2.8 2.5 2.4 2.4 3.5 9.5 12 8 1914. Jan. 26 29 Feb. 6 10 22 Mar. 4 11 20 28 Apr. 9 23 May 1 9 12 Oct. 12 Dec. 12 1915. Jan. 14 16 17 23 24 Feb. 6 7 13 20 27 Mar. 6 7 12 20 27 Apr. 2 9 17 May 7 7 7 8 June 1 July 13 Aug. 10 24 Sept. 16 28 Oct. 8 12 26 Nov. 9 30 Dec. 6 21 1916. Jan. 11 26 Feb. 1 2 4 5 8 10 12 16 19 23 24 26 Mar. 1 6 8 14 16 20 21 26 27 30 R.W.Day... Feet. 4.90 1.90 1.50 1.43 3.05 1.72 1.57 1.47 1.73 1.46 1.52 1.52 1.39 1.38 .84 1.24 1.16 1.15 1.15 1.34 1.26 1.90 1.82 3.. 02 2.23 2.17 2.27 2.24 2.11 1.87 1.74 1.72 1.66 1.61 3.02 3.06 2.94 2.93 2.90 1.84 1.37 1.15 1.13 1.14 1.14 1.07 1.17 1.08 1.26 1.21 1.31 1.27 1.83 2.50 4.80 4.70 4.40 4.30 3.95 3.80 3.65 3.45 3.18 2.90 2.88 2.90 3.05 2.75 2.55 2.50 2.35 2.30 2.50 2.30 2.30 2.20 Sec.-ft. 1310 5 8 do F.C. Ebert do do... do... do F. C. Ebert 90 26 17 H. L. Davis.. 20 Mar. 6 F.C Ebert 386 8 do 60 8 27 36 27 F.C. Ebert ..V/aoV^V/^V.'.'.'.'.'.'.'.'. do F. C. Fbert Apr. 1 do H. L. Da^'is . 61 28 12 F C Ebert 33 14 H. L. Davis.. R. W. Day.. 32 14 15 do do .do.-.. do : F. C. Ebert 18 17 23 do.... D.A.McClung Lee and Sleppv D. A. McClung .2 May 8 F C Ebert 10 ^ 27 H. L. Davis July 15 F. C. Ebert Aug. 12 H. L. Dai^s .5.8 Oct. 29 F.C. Ebert E. W.Case do do J. E. Gerish.. . • 4.6 Nov. 19 20 Dec. 8 1913. Jan. 10 .....do do.... do do... do do.... R. W.Dav do... 4.1 15 11 90 82 277 10 W. S. Post 152 16 E. W. Case 131 17 .do.... do 157 19 J. E. Gerish Ebert and Day 157 Feb. 15 W. S. Post R. W.Day. 119 17 F.C. Ebert do....: do.. do do.... do... 71 18 22 do R. W. Day .64 55 22 25 do do 45 41 25 Mar. 4 11 17 18 do do do do F. C. Ebert do do... do.. do.... do W. J. Isbell 326 373 315 311 297 20 do do do. \ do do do do do. .. ... 72 24 31 Apr. 9 16 do do.... do F. C. Ebert 14 3.9 3.0 4 3 22 W. J.Isbell 4.1 29 F. C. Ebert 2.2 May. 6 W. J IsbeH 3 3 ^ 11 17 do R. W. Day dor!! ""-'"""' 2.5 7.8 23 27 .....do....: do do. do. F. C. Ebert do F. C. Ebert 5.5 11 June 3 13 16 H. D. McGlashan W J. Isbell 8.9 26 R. W. Day ... . 69 July 2 do.... W.D.McFadden .....do... 531 " 8 do 742 14 22 do do... do.... F. C. Ebert . . .....do R W Day , 704 508 30 Aug. 28 do.... do.... do do !;!"do!!]!"!'!!!""!!!! do do do do do F. C. Ebert 496 373 Oct. 4 Nov. 12 13 14 16 20 21 30 Dec. 4 16 16 do... do do... do do.... do do do.... do.... do do R. W. Day.... 345 308 268 221 186 187 215 310 203 178 148 R. W. Day 141 1914 R.W.Day 158 Jan. 8 do do dof 183 16 20 F.C.Ebert 150 165 22 do 151 a Made by JEioats. SAN DIEGUITO RIVER BASIK. 127 e measurements of Santa Ysabel Creek near Ramona, Calif ., for 19 12-19 IS — Con. Made by- height. Dis- charge. Made by— Ciage height. Dis- eaige. 1916. Apr. .5 12 19 25 May 2 9 16 June 6 13 20 July 11 18 Aug. 10 Oct. 7 17 18 1917. Jan. 19 21 W. J. Isbell. ...do...... ...do ...do ...do ...do .do ...do ...do...... ...do .do. .. ...do ...do F. C. Ebert 1 >Y. J. Isbell . 3. L. R. Case ...do W. J. Isbell . shell and McClung.... F.C. Ebert. -- D. A. McClui McClung and D. A. McClm VIcClung and F.C. Ebert. ig Case Case.'.".";'. Feet. 2.14 2.02 1.90 1.66 1.66 1.52 1.37 1.33 1.24 1.15 1.08 1.00 .87 .79 .71 .58 .65 .64 .42 1.64 2.56 2.18 Sec.-ft. 126 139 90 164 102 1917. Feb. 13 18 27 Mar. 8 9 21 28 Apr. 13 18 May 21 June 8 29 Aug. 20 Sept. 4 Oct. 4 Nov. 19 Dec. 23 31 1918. Mar. 8 14 Apr. 1 May 5 Aug. 12 29 D. A. McCliuig F.C. Ebert D. A. McCliuig... MeClung and Dean F.C. Ebert D. A. McOlung F.C. Ebert MeCIung and EoUey . . . McGlashan and Ebert.. F.C, Ebert D. A. McClung do McClung and Gavin McClung and Campbell T.P.Ellis McClung and DeVenelle D. A. McClung F.C. Ebert F.C. Ebert do D. A. McClung F.C. Ebert D. A. McClung 1.78 1.76 2. 45 2.34 2.33 2.17 2.02 1.78 2.06 1.S2 1.77 1. 55 1.40 1.29 1.25 1.34 1.47 1.48 2.16 2.38 2.65 2.41 2.08 2.10 Sec. -ft. 27 80 145 61 66 52 42 4.5 6.4 104 131 . 32 15 1.2 .5 128 SUEFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily e, in second-feet, of Santa Ysabel Creeh near Ramona, Calif., for 1912- 1918. Day. Feb. Mar. Apr. May. Juno. July. Aug. Sept. 1 1912. 9.5 17 9.5 14 17 55 29 21 31 278 54 52 182 69 44 38 25 18 14 11 19 21 16 16 13 44 55 36 45 122 73 59 52 43 40 40 36 30 37 42 45 218 252 185 168 133 114 89 85 75 66 59 53 47 43 41 40 46 40 38 36 34 34 34 31 31 30 45 92 106 80 68 58 50 40 34 30 25 24 22 20 20 20 20 20 19 20 20 19 18 18 16 14 14 14 12 12 12 12 11 10 11 11 11 11 12 11 11 9 7.4 7.0 6.6 6.2 6.2 6.6 6.6 6.2 5.0 4.5 4.0 5.4 7.0 4.2 4.8 6.6 , 9 5.8 4.5 4.2 3.8 3.0 2.8 2.0 2.0 2.2 2.0 2.0 1.3 1.8 7.4 4. -8 2.4 1.8 1.3 1.0 1.0 1.0 .8 .8 1.0 1.3 1.6 1.6 1.3 1.0 1.0 .8 .3 .3 .1 .1 .05 .05 .1 .05 .05 .05 .05 .05 .05 .4 .5 .5 .3 .2 .1 .05 .04 .04 .05 .1 1.6 1.3 1.0 0.5 .4 4 2 3 4 .6 5 4.8 4.8 4.8 4.8 3.4 3.1 3.1 3.1 3.1 3.7 3.4 3.1 3.1 3.1 3.1 3.1 3.1 1.9 6 6 7 .4 8 .5 9 .6 10 .5 11 .04 12 .04 13 .04 14 .04 15 ... .04 16 .04 17 .... .03 18 .02 19 .02 20 .02 21 .03 22 .02 23 .02 24 - - .02 25 .03 26 .03 27 .02 28 .02 29 .02 30 .03 31 Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1912-13. 1 0.05 .05 25 14 25 14 6.5 4 4 4 2 2 2 1.5 1.5 1.5 1.5 1 1.5 1.5 1.5 1.5 1.5 2 2 2 2 2 2 2 2 1 1 2 2.0 2.5 2.5 2.5 2 2 2 2 3 3 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 3.5 4.5 4.5 4.5 4 3.5 3.5 3.5 3.5 4 4 4 4 3.5 3.5 4 4 4 4 3.5 3.5 3.5 3.5 .3.5 3.5 4 3.5 3.5 3.5 3.5 3.5 4 4 4 3.5 3.5 4 3.5 3 4 5.5 8 5 5 5.5 5.5 6 39 22 16 12 9 7.5 7 7 6.5 6 6 5.5 6 6.5 6 6 6 5.5 5.5 5.5 7.5 11 9 21 11 8.5 7.5 7.5 7 7 7.5 8 7 7 7 8.5 16 118 28 24 81 58 123 67 40 33 30 28 28 26 25 21 19 19 19 39 39 30 25 21 19 19 20 30 25 22 20 72 49 39 33 32 27 26 25 24 30 27 24 21 19 18 17 16 15 15 15 14 18 12 10 10 16 18 14 14 13 13 11 10 9.5 9.5 9.5 9.5 9.5 10 9.5 10 9 9 8 8 8.5 9 8 8 8 7 7 7 6 6 6 6 6 6 6 5.5 5.5 5.5 5 5.5 7.5 9 6 5.5 5.5 5.5 5.5 4.5 4 4 3.5 3.5 3.5 3.5 3 3 2.5 2.5 2 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.6 2 1 1 0.5 .5 .5 .5 .5 .3 .2 .1 .05 .05 .05 .05 .05 .0 .0 .05 .05 .1 .1 .4 .5 .2 .2 0.2 .2 .2 .2 .1 .1 .1 .1 !i .1 .1 .1 .1 .1 .1 .1 .1 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 !l 0.1 2 .1 3 .3 4 .3 5 .3 6 .3 7 .3 8 .3 9 .3 10 .3 11 .3 12 .3 13 .2 14 .2 15 .2 16 .2 17 .2 18 .2 19 .2 20 .2 21 .1 22 .1 23 .1 24 .1 25 .1 26 ,. .1 27 .1 28 .1 29. . .1 30 .1 31 SAN" DIEGUITO RIVER BASIK. 129 BoiUy discharge, in second-feet, of Santa Ysabel Creek near Ramona, Calif., for 1912- 1918 — Continued. Day. Oc1 Apr. May. \ June July. 2.5 2.5 3 13 .3 2.8 18 4.6 3.4 2.6 2.4 2.4 2.5 2.5 2.5 2.5 2.5 2 2 1.5 1.5 1.5 2 2 2.5 2.5 2.5 3 5 4.5 5 6.5 4.6 4.6 4.3 3.8 4.0 4.0 3.8 4.3 5.2 10 7.0 5.5 5.5 12 9.0 10 9.5 8.0 8.5 6.7 6.4 7.0 7.0 7.0 6.7 5.8 6.7 13 26 785 1,140 208 101 5.8 5.8 5.8 7.0 5.8 5.5 4.9 4.6 5.5 25 13 10 19 17 13 21 915 780 255 24 19 685 255 1.490 '440 285 210 155 122 38 81 151 460 365 170 76 67 62 1,080 1,250 510 270 230 185 180 190 135 120 203 152 136 150 278 168 142 132 628 470 375 850 438 350 283 255 220 190 170 160 140 135 125 120 225 145 130 120 110 110 103 100 10 13 22 14 12 11 9.5 8.0 9.0 6.5 8.0 8.5 8.0 6.5 6.0 6.0 5.0 4.5 4.5 3.0 2.0 9 10 9.5 9.5 9 142131°— 21— W3P 447- 130 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORISriA. Daily discharge, in second-feet, of Santa Ysabel Creek near Ramona, Calif., for 1912^ iW^— Continued. 3.9 3.3 3.6 3.3 2.6 2.0 1.6 2.0 1.8 3.3 3.6 3.3 4.2 4.5 4.2 3.3 3.3 2.4 214 2.0 2.4 2.8 2.8 3.3 2.6 2.4 1.4 1.4 1.8 2.4 Nov. Dec. 2.4 6.5 3.3 7 3.9 7 4.2 38 4.2 34 7 11 8.5 9 7.5 7.5 8 7 10 7 9 7.5 7 7 6 12 5.5 42 6 13 6 11 5.5 11 5.5 9 5.5 &5 5.5 9 5.5 8.5 6 9 6 9 6 ' 6 8 6 7 6 7.5 6 11 6.5 21 20 11 1 12 11 18 11 25 12 20 15 16 15 17 14 15 13 11 13 12 12 12 12 12 12 15 11 15 11 9 11 10 12 11 11 12 11 12 13 13 15 14 14 16 13 15 13 12 14 260 15 102 15 40 15 35 15 36 12 39 11 48 55 J 55 81 664 6,060 7,420 3,680 2,110 865 560 450 400 611 14, 100 9,740 2,540 1, 160 865 30 37 101 ; 50 ' 83 I 170 ! 140 I 116 80 50 50 47 Feb. Mar. 754 300 694 290 666 240 666 230 612 255 517 215 459 200 382 190 343 165 320 160 320 150 309 165 298 150 277 148 258 160 258 150 249 150 240 145 224 150 210 170 210 190 198 180 187 210 182 180 190 165 205 150 210 165 245 158 320 165 151 145 25 95 30 80 32 70 28 80 26 75 25 70 26 65 27 60 25 65 26 110 25 70 27 60 27 60 25 60 25 60 25 60 80 60 90 55 100 50 125 47 120 48 700 49 1,130 49 205 50 235 47 170 43 135 41 115 40 36 39 40 Apr. 140 135 130 125 120 125 115 105 110 105 110 139 115 105 110 105 100 95 235 128 34 33 32 32 47 40 47 39 May. June. 67 38 65 38 65 37 65 37 65 36 65 36 60 35 60 30 55 30 55 30 56 25 56 25 56 25 56 25 57 25 57 26 55 26 55 27 60 27 55 27 55 27 55 26 50 26 45 25 45 24 45 24 45 23 40 22 40 22 40 21 39 33 29 33 28 33 23 29 21 29 20 30 20 34 20 30 19 34 18 32 18 29 16 26 16 25 15 23 13 22 11 22 10 18 9.5 38 8.5 39 8.5 33 8 33 8 32 7.5 32 7 48 6.5 71 7 45 6.5 36 6.5 32 6.5 33 7 32 32 7.5 !. July. 4.8 4.5 4.0 4.0 4.0 4.5 4.2 4.0 4.0 3. J 4.0 4.2 8 o. o 6.5 5.5 SAN DIEGUITO EIYEK BASIN. 181 Daily discharge, in second-feet, of Santa Ysabel Creel, near liamona, Calif ., for 19 12- 19i,?— Continued, Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1917-18. 1 1.5 1.4 1.4 1.4 1.4 1.4 1.4 1.6 1.4 2.0 1.8 2.9 3.0 3.7 5 5.5 4.7 4.0 2.3 2.2 2.2 2.2 2.3 2.4 2.6 2.8 2.6 2.4 2.6 2.6 2.2 2.2 2.2 2.0 2.3 2.4 5.5 19 13 8 5.5 5.5 .5.5 .5.5 5.5 5.5 5 4.0 2.6 2.3 2.6 2.9 4.4 5 5 5 5 5 5 5 4.7 4.4 4.7 4.2 4.2 4.4 5 4.4 4.0 4.7 4.7 5 5 5.5 5. 5 5 5 5 5 5.5 5 4.7 4.7 4.7 5.5 6 6 6 6 6 6.5 6 6 6 6 6.5 6 6 6 6.5 6.5 6.5 54 ■ 17 10 10 9 8.5 7.5 7.5 7 6 7 15 48 31 18 12 12 12 12 11 10 9.5 9.5 8.5 9.5 9.5 9 7.5 7 7.5 8 8.5 8.5 9 9.5 50 29 22 17 60 31 20 22 20 17 15 14 13 11 9.5 9 13 128 121 22 14 580 1,.300 420 131 90 60 55 50 140 185 90 75 70 65 50 42 41 43 42 34 32 31 32 32 30 28 27 27 25 22 23 23 23 25 23 21 20 . 18 16 13 13 20 18 18 15 15 14 15 13 14 12 12 12 12 12 12 12 12 12 16 14 13 12 12 12 10 9 7.5 6.5 6 6 5.5 4.6 5 4.6 4.6 5 4.6 6.5 33 12 4.2 3.6 3.3 3.3 2.7 2.4 2.1 2.1 1.8 1.5 1.3 1.1 1.0 1.1 1.8 2.7 2.4 2.1 1.8 2.1 2.4 2.4 2.4 2.4 2.7 3.0 3.3 3.6 3.0 2.4 1. S 1.8 1.5 1.8 2.1 1.8 2.1 2.1 1.8 1.5 1.5 1.1 1.0 1.0 1.1 1.1 1.0 1.1 1.3 1.5 1.8 1.5 1.8 1.5 1.5 1.5 1.3 1.1 1.1 1. 1 .9 .8 0.9 1.0 1.0 1.1 1.3 1.5 2.4 3.6 1.3 1.1 1.3 1.1 1.3 1.1 1.5 1.8 2.7 1.8 2.2 1.5 .9 .4 .4 . 4 .2 .2 1.2 .5 .4 .7 1.8 1.8 2 1.5 3 l.l 4 1.0 5 .9 6 .8 7 8 1.0 1.1 9 1.1 10 11 1.1 .9 12 . .. .8 13 .8 14 .8 15 1.3 16 1.8 17 1.8 18 2.1 19 1.3 20 1.1 21 .8 22 .7 23 .5 24 .9 25 1.1 26 27 28 1.1 l.l 1.1 29 1.0 30 1.0 31 Note. — Daily discharge determined as foiiows: 1912, Feb. 5 to Sept. 30, 1912, from rating curves well defined above 3 second-fot^t. 1912-13: Oct. 1, 1912, to June 3, 1913, from well-deflned rating curves; June 4 to Sept. 30, by shifting- control method and interpolation between measurements. 1913-14: Oct. 1 to Nov! 12, 1913, estimated from measurements; very little change in stage; Nov. 13, 1913, to Sept. 30, 1914, when shifting-controi method was used, except Mar. 28 to May 1, 1914, from well- defined rating curve. 1914-15: Oct. 1, 1914, to Feb. 11, 1915, from well-defined curve; Feb.12-19, 1915, by shifting-control method; Fel). 20 to May 5, from an average rating curve well defined; May 6-31, 1915, by shif ling-control method; June 1 to Sept. 30, from well-defined rating curve. 1915-16: Oct. 1 to Dec. 31, 1915, from well-defined rating curve; Jan. 1-15, 1916, gago-hcight record lost; discharge estimated from record obtained at Mesa Grande; Jan. 16-31, computed from hydrograph: Feb. 1-24, well-defined rating curve; Feb. 25 to Sept. 30, from fairly well defined rating curves covering .'^iiort periods, computed by shifting-control method and by interpolation ])etween discharge mea.surements. 1916-17: Oct. 1 to Dec. 7, 1916, estimated from discharge measurements and record obtained at Mesa Grande; Doc. 24, 1916, to Jan. 2, 1917, Jan. 19 to Apr. 15, and May 18-23, from fairly well-defined rating curves applicable for short periods and by shifting-control method. Jan. 13, 1917, gage not read; discharge estimated. 1917-18: Two rating curves used, Oct. 1, 1917, to Mar. 11, 1918, are fairly well defined. Discharges Mar. 12-13 and 15-25 computed from record obtained at Mesa Grande; remainder of year computed from fairly well defined curves covering short periods. Record Mar. 12-25, poor. 132 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA, - Monthly discharge of Santa Ysahel Creek near Ramona, Calif., for 1912-1918. Month. Discha rge in second-feet. Run-off (total in Maximum. Minimum. Mean. acre-feet). 1912. 4.8 278 252 106 14 9 1.6 .6 1.9 9.5 30 16 4 .8 .04 .02 3.62 46.7 75.0 35.4 9.22 2.90 .37 .19 180 March 2,870 April 4,460 2,180 May. 549 July 178 22.8 11.3 The period . . . 10.. 500 1912-13. October 25 3.5 4.5 39 123 72 30 10 5.5 .5 .2 .3 .05 1 3.5 3 5.5 19 9.0 5.0 1 .05 .05 4.29 2.38 3.77 7.68 24.3 29.0 15.4 7.19 2.00 .19 .10 .19 264 142 December 232 472 February 1,350 1,780 March April 916 May 442 155 July 12 6 September 11 123 .05 7.99 5,780 1913-14. October .1 28 18 1,149 1,490 94 64 32 22 1.5 .1 .1 !i 1.5 4 19 25 14 11 2.0 .1 .1 . 1 .10 3.33 4.53 82.4 153 40.5 27.2 17.9 8.77 .32 .10 .10 6 198 279 January 5,070 8,500 March 2,490 1 620 May 1 ; 100 522 July. 20 August . 6 September 6 The year 1,490 .1 27.3 19,800 1914-15. October 1.6 18 12 915 1,250 412 412 850 74 26 110 5.5 .1 .2 3.8 4.6 62 58 38 73 27 9 2.5 1.5 .57 2.10 6.45 70.2 259 122 81.6 221 47.0 15.6 9.26 3.90 35 125 December 397 January 4,320 14,400 7, 500 March . April 6,860 Mav -^ 13,600 2,800 June July 959 August 569 September 232 The year 1,250 .1 68.7 49,800 1915-16. October . . . 4.5 10 42 14, 100 754 300 140 67 38 20 12 10 1.4 2.4 6.5 7 182 145 70 39 21 12 8 8 2.75 6.05 12.2 1,690 345 182 102 54.3 28.2 14.9 10.5 8.6 169 360 December 750 January 104,000 19,800 11,200 6,070 May . - 3,340 1,680 918 August 646 September 512 14,100 1.4 206 149, 000 SAN DIEGUITO RIYEE BASIK. 133 Monthly discharge of Santa Ysahel Creek near Ramona, Calif., for 1912-1918 — Continued. Month. Discharge in second-feet. Run-off (total in Maximum. Minimum. Mean. acre-feet). 1916-17. 50 15 260 170 1,130 110 235 71 29 8 5 55 9 11 9 21 25 36 26 18 6.5 3.8 1.3 .5 16.9 12.8 30.3 57.5 130 59.2 46.4 32.8 13.3 5.66 2.66 3.15 1,040 762 1.860 January. . 31540 7,220 March... 3,640 April. 2,760 Mav 2,020 791 July 348 164 September . - . 187 The j'ear . . 1,130 0.5 33.6 24,300 1917-18. October 5.5 19 6.5 54 50 1,300 32 33 3.6 2.1 3.6 2.1 1.4 2.0 4.0 6 7 9 12 4.2 1.0 .8 .2 2.48 5.13 5.06 12.0 16.3 127 20.9 9.99 2.32 1.42 1.25 1.11 152 305 December. 311 738 February . . . 905 March 7,810 April 1,240 Mav.... 614 138 July.... 87.3 76.9 September 66 The year 1,300 .2 17.2 12,400 SAKTA YSABEL CHEEK NEAR ESCONDIDO, CALIF. Location. — In SW. I sec. 31, T. 12 S., R. 1 E., at mouth of canyon at upper end of San Pasqual Valley, about 10 miles southest of Escondido, San Diego County. Roden Canyon Creek enters 1-| miles above and Santa Maria Creek 4 miles below station. Drainage area. — 128 square miles (measured on topogTaphic maps). Elevation. — About 500 feet above sea level. Records available. — ^January 1, 1906, to September 30, 1912. Gage. — Inclined staff fastened to large boulder on left bank at mouth of canyon. Original datum was maintained. Discharge measurements. — ^Made from cable at gage or by wading. Channel and control. — Sand; very shifting. Extremes oe discharge. — 1906-1912: Maximum stage recorded March 24, 1906 (discharge, 8,000 second-feet); no flow for at least a few days each season from 1908 to 1912. Diversions. — ^No large diversions above the station. . East and West San Pasqual ditches divert below the station. Regulation. — None. Accuracy. — Stage-discharge relation not permanent. Several fairly well defined rating curves were developed covering short periods. Gage read to hundredths once daily. Daily discharge ascertained by applying daily gage height to rating tables by shifting-control method and by interpolation between discharge meas- urements. Records fair, the degree of accuracy depending principally on the number of discharge measurements obtained during the season. 134 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Discharge measurements of Scmta i^saheJ Creel, neur Escondido, Calif., for l&OS^Ml^'. [By W. V. Haidy, F. C. Ebert, and others.] Date. Gao:e height. Dis- charge. Date. Gage height. Dis- charge. 1905. Nov. 21 Feet. Sec.-ft. 4.5 41 10.4 4.2 13. 5 17.8 25 44 28 158 132 5, 300 3, 240 2,040 916 870 900 713 183 116 151 88 25 3.7 2.6 15 10.8 10 60 127 101 311 242 67 55 97 111 177 146 95 82 61 58 40 42 28 35 22 5.7 12 10 15 11 10 10 14 71 44 43 60 42 37 41 91 72 30 26 1908. Mar. 25.. . Feet. 1.92 1. 91 1.91 1.87 1.86 1. 85 1.8') 1.84 1.82 1.78 1.77 1. 77 1.77 1.73 1.72 1 61 1.70 1.77 1.80 1.78 1.83 1.80 1.87 .76 .54, .90 .78 .68 1.10 1.02 .84 .87 .98 .93 1.15 1.25 1.28 1.32 1.80 1.70 1.60 l.,55 1.51 1.40 1.40 1.35 1.28 1.23 1.20 1.22 .60 .51 '. 60 .67 .69 .72 .76 .80 .96 .94 .90 .90 .86 .87 .84 .75 .79 .77 .74 .80 Sec.-ft. 23 28 3. 72 3. 55 3.56 3. 55 3.57 .3.64 3.70 3.70 3. 75 3.52 4.00 2.65 2.00 1.00 .85 .70 .50 1.00 1. 4,5 1.82 2.18 2. ,35 2.45 2. 46. 2, 54 2.64 2.70 2.80 2. 05 1.90 2.20 2.30 1.90 1.99 2.05 2.18 2.10 2.00 1. 95 1.90 1.90 2.00 2.02 1.99 1.99 2.01 2.06 2.02 2.02 2.28 2.28- 2.32 2.- .30 2.30 2.27 2.30 2.50 2.40 2.24 2.19 2.12 2.06 2.05 2.29 2.10 1.95 1.98 31 25 Dec. 21. . Apr. 7 12. 23 18; 1906. Jan. 10 18 25.. . 14 34 30 29 May 4 1& Feb. 8 21 11 14. 20. 20 22 10 It ]•" 29 9i2 23 June 4 8.2 26 June 10.. . .5.6 26 14 4.9 26. . .July 6 Nov. 11.. . .31 27 1. 8 27 26 5. 6 27. . . Dec. 3 8.1 28 11 3.8. Apr. 14 25 16 4.8 24 .5.4 30 Mav 12 June 24. 1909. .Tan. 19 11 Aug 10 28 156 0<'t. 3 . Feb. 1 65. Nov. 30 4 173 Dec. 7 ,5 163 20 6 . .. lOI 8 325 1907. 8 284 Jan. 1 ' 9 260 22 9 238 28.. . 17 129 30 28 154 30 Teh. 12 Mar. 4 13 96 86 16 ' 18 82 21 , 26 89 Mar. 12 ' 27 342 15 27 265 Apr. 2 6 ! 28 214 1 28 288 15 1 28 191 19 1 29 173 May 4 10 1 Apr. 5 115 i 10 loa 21 ' 15 63 24 ' 24 44 June 4 May 24 31 7 Dec. 23 83 17 July 19.... Dec. 13 1910. Jan. 11 105 21 31 66 29 Feb. 11 44 19 46 1908. Jan. 4 22 ,.-.. 23 53 56 13 Mar 6 31 18 10 34 23 22 39 29 31 Apr. 4 57 30 42 Feb. 8 8^ 42 17 15 34 21 28 1 Mav 5 .. .. 18 26 20 Mar. 2 1 " 16 10 5 30 4.2 6 June 2 5.7 14 8 3.3 19 ... 30 1.3 Nov. 25 2.9 SAi^ DISGUIXO PvIYEPv BASIisT. 135 Discharge measurements of Santa Ysahel Creeh near Esco^idido. Calif., for 1905-1912 — Continued. Date. Gage height. charge. ]>ate. Gage height. Dis- charge. Feb 7 1911. Feet. 0.80 .87 .48 .25 .10 .06 .12 .14 .47 140 48 17 2.4 May 4, 2m June 1,690 762 July August 258 SeptemVer 184 Thp poriod 61,700 1906-7. October 15 21 500 110 290 200 65 35 15 5 6 3 11 4(1 50 50 07 33 16 5 4.7 9.fi 12.4 1S5 72.4 188 ION 49 24. (i 8.t) .037 . 075 097 1.21 . rwvti 1.08 .8-14 . 383 .192 . 0*i7 .039 . 043 .08 .11 1.40 .59 1.24 .94 .44 .21 .08 .04 . 05 2.,9 November 571 December 762 Jamiarv 9,5;» Febmarv 4,020 8,480 April 6,4;w mS".. ...:.: :.:.;.:.: 3,010 1,400 July ■ 521^ 307 September . 327 The year 500 3 49.4 .ZH\ 5.22 35,700 1907-S. October.. November 15 12 15 136 14(i 82 44 25 9 1 G 10 10 37 20 12 5 1 a 8.1 10.2 12 25.0 54.1 37.7 20. 9 13.7 S.OO .129 .0 . 0(33 . OSO .093 .2tt<3 .123 .294 . iG3 . 107 . 040 . 0010 .00 .00 .07 .09 .11 .23 .41) .34 .18 .12 .04 .001 .00 .00 498 607 December 738 Jannary 1,570 February 3,110 2,320 1,240 April May 842 June 301 July 8 August ScptfTnbei' The ve;v.- 14fi ]■,..■, . 1-12 1.64 11,200 1908-9. October .... 2 17 6, 500 800 340 125 41 27 22 20 2 5 65 80 42 28 14 3 .603 2.74 o.tio 298 118 74.8 34.5 23.2 11.7 4.;Jo .0047 .■)21 .044 2.29 1.69 .^>22 .584 .270 .ISI . (J91 .005 .02 .05 2.64 1.76 1.06 .65 .31 .20 . I'v) .04 37 November 163 December 347 Januarv 18,000 February 12,000 March 7,260 April 4,450 May 2,120 1,380 June July 719 August 327 September 258 The year P,500 03. s ..3)4 6.^.9 47,100 1909-10. October 14 52 700 3,100 U 90 62 20 1 4 4 20 . i Mar. Ap. May. .Tvnie. July. Aug. 1914-15. 1 286 1,060 915 352 334 226 197 318 520 336 267 234 230 198 180 165 186 220 170 148 139 120 112 104 97 100 92 68 70 64 58 60 54 57 48 126 100 88 6S 67 47 60 50 46 35 27 29 29 36 29 50 91 72 42 42 42 710 382 334 242 199 199 199 303 570 son 905 770 650 1,250 690 482 398 366 303 272 242 213 185 185 172 172 305 207 155 145 140 130 120 115 110 100 95 85 75 70 65 65 60 60 55 50 50 45 45 40 35 35 30 30 25 20 20 20 15 15 15 14 13 12 11 10 9 8 7 6 5 4 4 3 3 2.5 1 1 .5 .5 .5 .4 .4 .3 .3 .2 .2 .2 .1 .1 2 3 4 5 . . 6 7 8 18:3 9 183 1,840 2,380 740 399 318 241 226 211 211 197 197 399 211 183 183 241 271 226 183 10 . 11 12 13 14 15 16 . . 17 18 19 20 21.. . .1 .1 .1 .1 .1 .1 .1 1 . 080 i;660 432 22 23 24 .. .. 25 26 27 28 29 20 5 1 30 31 .5 .2 SAX DIEGUITO EIVER BASIN. 14S Daily discharge, in second-feet, of San Dieguito River at Bernardo. Calif., 1912-1916 — Continued . Day. Dee. Jan. Day. Dec. Jan. Day. Dec. Jan. 1915-16. 1. 0.5 ."5 8 1.5 .3 .3 .1 .1 22 22 27 22 22 32 32 32 32 45 11. 12. n 1915-16. 0.1 .1 .1 .1 22 18 10 10 10 7 257 100 82 74 230 1,310 21. 22. 23. 24. 25. 26. is! 29. 30. 31. 1915-16. 7 5 2.5 2.5 2.5 2.5 2.5 14 45 33 2 3 4 - 14. 15. 10. 17. 18. 19. 20. 5 6 . ... 7 8 9 10 Note.— Daily discharge determined as follows: 1912: Apr. 17 lo June M), from fairly well defined rating curve. 1913: Feb. 1 to Apr. 10, from well-defined rating curve; Apr. 10 to May 30, 1913, interpolated between measurements. 1914: Jan. 26 to June 28, from rating curves covermg short periods and by shifting-control method. 1915: Jan. 29 to Mar. 3, from fairly well-defined rating curve; Mar. 4 to July 20, from rating curves cover- ing short periods and by shifting-control method. 1915-16: Oct. 1, 1915, to Jan. IG, 1916, from curve fairly well defined except for iLood stage. No gage- height record Nov. 17 and Dec. 1, 2, and 3, 1915— discharge estimated . Monthly discharge of S w Dieguito River at Bernardo, Calif, for 191 .'-1916. Month. Disch irge in second- feet. Run-off (total in acre- feet). Month. Discharge in second- feet. Rim-oft- (total in Maxi- mum. Mini- mum-. Mean. Maxi- mum. :HiiU- nium. Mean. acre- feet). 1912. April 17-30 Mav 127 192 1.0 .0 .0 .0 30 1.3 .2 .0 .0 .0 61.1 32.4 .55 .0 .0 .0 1,700 1,990 32.7 .0 .0 .0 1913-14. Februarv March 2,870 155 72 52 3 3 8 2 1 229 39.1 20.3 11.3 .4 12, 700 9 400 June April 1 210 July. May ' 095 August 24 September The year 1914-15. 2,870 29. 6 21,400 1912-13. .2 .2 .2 5.58 22. C) ' '. 13 .05 12 12 12 310 1,390 320 I November 1, uuO 2,380 520 710 1, 250 65 2<) 183 70 I 102 450 153 139 322 29. 5 .88 .86 December 6 270 January February March 25^000 9 410 February - 64 30 .2 .05 March. April 8 270 April May 19,' 800 1 76(1 May June July 54 July 1 53 The year 1915-10. December January 1-16 September. 2, 380 97.4 The year 72 2.80 2,070 45 1,310 .1 22 7.18 146 441 1913-14. .1 1,680 .1 .04 71. 4 2 4,390 4,630 January 5,070 1 Note.— No flow in months for Avhich discharge is not given. See Extremes of discharge, page 140. SAN DIEGUITO RIVEB, NEAR BERNARDO, CALIF. Location.— In SE. i NW. ^ sec. 18, T. 13 S., R. 2 W., at CurroU dam site— the reser- voir now known as Lake Hodges (PL VI T, B, p. 44)— 5i miles below Bernardo Bridge, about 10^ miles above mouth of river, and 4 miles southwest of Bernardo, San Diego County. Drainage area. — 299 square miles (measured on topogi-iphic maps). Elevation.— About 200 feet above sea level. Becords available.— January 17, 1916, to September 30, 1918. Gage. — Vertical staff in four sections on right bank at dam site. Zero of gage 214 feet above sea level. DiscHARaE measurements.— Made from cal)le at gage or hj wading near giige. Channel and control.— Shifting sand with bedi-ocfc outcropping about 400 feet below gage; fauiy permanent except during low stages. 144 SUEFACE WATER OF PACIFIC SLOPE, SOUTHERE" CALIFORNIA. Extremes of discharge. — 1916-1918. Maximum stage recorded, 21,2 feet 1 to 3 p. m. . January 27, 1916 (discharge, 72,100 second-feet); no flow July 30 to September 30, 1916, and June 30 to September 30, 1917. Diversions. — East and West San Pasqual ditches divert water for irrigation in San Pasqual Valley. In addition there are several pumping plants along the river above the station. Regulation . — None . Accuracy. — Stage-discharge relation not permanent, except for short periods. Fairly well-defined rating curves were used February 1 to March 19, March 25 to May 18, and October 3 to December 1, 1916; January 3-18, and May 9 to June 29, 1917. Gage read to hundredths twice daily; more frequently during high water. Daily discharge ascertained by applying mean daily gage height to rating tables, by shifting-control method, or read directly from rating curves covering short periods. Records good. Cooperation. — Daily-discharge record for 1918 furnished by San Dieguito Mutual Water Co. through Ed. Fletcher, president. Discharge measurements of San Dieguito River at Carroll dam site, near Bernardo, Calif. ^ for 1916-19] 8. Date. Made by— Gaee height Dis- charge. Date. Made by- Gage height. Dis- charge. 1916. Feet. Sec. -ft. 1917. Feet. Sec.-ft. Feb. 20 E. A. Bartl EbertandBarll 2.67 2.60 335 326 Mar. 10 E A. Bartl 1.67 1.60 100 23 Bartl and Hayes 107 Mar. 2 E. A. Bartl ■ 3.28 467 10 Ebert and Bartl 1.78 178 8 ....do 2.60 254 11 do 1.64 112 11 McGlashan and Ebert.. 2.43 224 17 E. A. Bartl 1.28 64 14 E. A. Bartl 2.33 213 30 .....do 1.00 42 18 do 2.18 173 Apr. 8 do .68 15 21 2.83 360 10 do .91 54 25 do - 2.49 234 12 do .83 32 31 do 2.08 161 16 do .99 72 Apr. 5 do 2.05 159 17 do 2.37 349 10 do do 1.80 1.70 123 98 18 20 do 1.73 1.43 126 19 do 65 24 do 1.55 84 23 do 1.20 59 30 do 1.43 77 29 do 1.16 61 May 5 do 1.35 63 May 17 E. W. Case .59 6.3 12 do 1.22 45 21 Case and Grem .91 37 20 do 1.31 75 28 Hayes and Case .94 49 Juno 23 do do .....do .77 .62 .58 16 2.4 2.0 Nov. 9 17 Dec. 25 F. E. Green 30 D. A. McCluns. . . .1 July 8 do .2 14 Bartl and Ebcrt .68 11 1918. 15 E. A, Bartl . . . .. .80 .73 .65 25 11 5.9 Jan. 25 25 26 F. E. Green 5.7 19 do do do 6.7 23 do 46 29 do .46 .5 27 do .54 34 Oct. 2 do .58 17 31 do .01 13 3 W. J. Isbell .96 .64 .57 75 19 Feb. 4 7 11 do do do -.12 -.09 -.34 8.3 13 E. A. Bartl 11 21 do 3.5 28 do .42 11 14 do -.24 7.0 Nov. 4 do .40 7.5 18 do .62 74 9 do .40 6.8 21 do .05 24 19 do .46 13 23 do .57 74 25 do.. .48 14 25 do .42 34 Dec. 3 do .54 29 Mar. 1 do .08 15 16 do .48 19 4- do .06 12 27 do 1.70 119 7 do .37 39 31 do 1.08 38 8 do 279 1917. E. A. Bartl 1.14 39 9 11 do. . 1.31 72 Jan. 7 do 4,500 15 do 1.33 80 12 do 3,150 18 do do 1.46 2.6 108 602 , 13 13 do.. . 1,380 19 do 720 21 do 2.45 309 14 do 1.70 325 22 do 2.06 191 15 do 1.30 168 27 do 1.46 78 19 do .30 101 Feb. 1 . .do 1.30 1.17 60 41 21 25 do .88 .30 175 4 do do 96 10 do 1.09 42 29 do .08 68 18 . . .do ... ... 1.96 1.78 1.84 235 124 159 Apr. 2 8 12 do 7.80 7.76 7.72 57 21 F. C. Ebert do do 45 22 do 30 23 Ebert and Bartl 4.41 1,400 17 do 28 23 do E. A. Bartl 4.17 2.80 2.64 1,210 340 290 20 26 May 16 . do 6.9 24 do do 5.0 25 do 1.0 Mar. 1 .....do..... 2.02 142 June 22 D. A . McClung 2.0 SAN DIEGUITO KIVER BASIN. 145 Daily discharge, in second-feet, of San Dieguito River near Bernardo, Calif, for 1916-1918. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. 1916. 1 22 22 27 22 22 32 32 32 32 45 257 100 82 74 230 1,310 11,800 27,000 14,800 5,220 1,730 909 662 708 1,060 2,950 37,200 15, 100 4,750 2,200 1,220 30 30 139 218 92 57 41 35 31 26 23 100 189 87 70 152 97 114 555 535 325 180 120 95 85 80 76 72 68 64 60 718 672 649 626 581 537 493 449 449 449 428 428 407 407 396 386 365 355 345 345 335 335 325 315 305 345 335 365 396 56 50 47 43 42 42 42 41 41 40 40 39 38 37 35 31 90 232 197 170 140 160 1,240 360 285 260 225 537 471 407 407 428 359 316 254 244 235 226 217 208 199 190 182 182 174 174 210 360 275 310 300 235 217 199 190 182 174 166 130 120 110 105 100 86 66 66 66 150 125 108 88 83 80 76 68 66 64 ■ 62 59 57 55 52 50 48 45 43 41 39 36 158 158 150 158 158 150 138 126 124 120 123 141 141 116 116 113 109 103 105 96 89 85 84 84 80 79 75 73 69 68 33 30 27 24 22 20 17 14 14 53 53 33 24 25 25 260 315 123 82 64 47 52 58 48 44 41 60 61 52 66 64 62 61 59 57 58 58 56 52 51 49 48 49 49 44 42 41 50 75 68 67 60 55 54 52 49 48 45 44 42 40 31 25 21 23 17 15 14 35 42 36 31 30 21 14 6 4.2 11 46 36 34 26 22 31 90 79 61 50 43 42 40 40 38 34 37 38 35 30 29 27 26 •24 23 24 21 19 18 15 12 11 9 8 13 16 16 12 10 9 7 4.0 2.5 38 29 26 21 21 22 20 19 18 15 14 10 8 4.3 2.8 2.0 1.4 1.2 .6 .6 .6 .5 .5 .5 .4 .4 .3 .2 .0 1.0 1.0 2 3 4 .5 .5 2.5 1.0 2.0 1.5 1.0 2.5 2.6 5 11 25 91 6 6 7 8 9 10 11 12 13 h::::::::::::::::::: 15 16 17 16 18 13 19 11 20 5 1 21 22 i. . 2 5 23 i 6 24 ' 6 25.. . ■ A. 26 1 27 . . 1.0 28 29 5 30 31 1916-17. 1 6.5 17 89 48 19 52 45 38 32 31 30 28 27 27 27 26 24 23 21 21 21 20 19 20 17 13 12 11 12 11 11 11 10 9 7.5 10 12 13 10 7 8 I 13 12 11 10 11 14 13 13 14 13 11 13 13 15 12 11 12 14 13 26 29 36 33 32 28 24 23 22 21 2 22 2 17 18 20 18 20 20 20 19 19 22 310 380 120 65 45 40 38 2. 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ... ........ 21 22 23 24 25 26 27 28 29 30 31. ' 142131°— 21— wsp 447- -10 146 SUEFACE WATEE OF PACIFIC SLOPE^ SOUTHERN CALIFOR^^IA. Daily discharge^ in second-feet, of Son Dieguito E-ii^er near Bernardo. CaJif.. 1916-1918—- Continued . Day. Jan. Feb. Mar. Apr. May. June. 1 Day. Jan. Feb. Mar. Apr. xMay. Juae. 1917-18. 1.. 11 10 9 8 9 9 10 8 4 3 4 8 4 16 15 14 13 11 20 40 270 72 (>2 4,000 3,300 1.300 ■ 325 1(15 5(1 50 56 56 51 48 4.5 45 38 36 33 30 30 29 29 5 4 4 4 3 3 3 3 2 2 2 2 1 \ 1 .8 .5 .3 .2 .1 1917-18. 10 17 3 84 58 29 17 69 68 30 34 28 15 10 140 110 PO 101 200 175 140 120 104 97 90 80 70 50 50 50 28 28 20 15 7 7 6 6 6 5 5 .8 .6 .5 .4 25 20 2 3 18...- 4. . 19 5 20 21 22 7 8 24 25 47 21 15 13 12 12 26 . 11 27 . . . -. • 28 12 13 1 29 14 i 30 15 ! 31 .. Note.— Discharge Jan. 1-16, 1916, is record at Bernardo station; Jan. 17-31 computed by W. S. Post. No flow July 30 to Sept. 30, 1916. No discharge measurements obtained durins: June, 1917. Monthly discharge of San Blegirilo River near Bernardo, Calif, for 1916-191S. Month, Di.=!cha •ge in second-feet. Run-off (total in .* Maximum. Minimum. Mean. acre-feet). 1916. January . 37,200 718 537 158 40 25 22 305 166 68 4i 2.5 .0 4,180 432 265 113 54.0 20.2 4. 71 257,000 24,800 16,300 6,720 3,320 1 200 March... April • May June . July 290 The period 310 000 1916-17, October 89 15 380 555 1,240 150 315 90 38 6.5 13 23 31 36 14 4.2 .0 25.8 11.2 49.7 124 150 75. 6 69,2 32.8 9.27 1 590 '666 December. . 3,060 7,620 February ... 8.330 March..: 4,650 April 3,520 2,020 Mav 552 The year 1,240 .0 44.2 32,000 1917-18. November a. 10 a. 15 4.25 B.8 364 26.4 3.45 .23 6.0 9.2 January.. . . . 47 84 4,000 56 25 2 261 3 11 5 .4 .0 1,100 March 22, 400 April . 1,570 212 June 13.7 4,000 .0 35. 3 25,600 o Estimated. Note. — See note to dailj'-dischargc table. SAN DIEGUITO RIVER NEAR DEL MAR, CALIF. Location. — In San Dieguito grant at Santa Fe ranch pumpijig plant, about 4 miles above mouth, and 4^ miles northeast of Del Mar, San Diego County. Drainage area. — 328 square miles (measured on topographic maps). Elevation. — About sea level. , Records available. — October 1, 1912, to September 30, 1914. Gage. — Vertical staff on right bank about 300 feet from i)ump house. SAN DIEGUITO RIVER BASHSTc 147 Discharge measurements. — Made from bridge 2 miles below gage or by wading near gage. Channel and control.— Sand; very shifting. Extremes op discharge. — Maximum stag^ recorded, 6.0 feet February 21, 1914 (discharge not determined). No flow for several months each year. Diversions. — See San Dieguito River at Bernardo (p. 140). In addition Santa Fe ditch, having a capacity of about 10 second-feet, diverts water 300 feet above gage. The record at this station shows quantity of water wasted into Pacific Ocean. Regulation. — None. Accuracy. — Stage-discharge relation not permanent. Gage read to half-tenths twice daily. Daily discharge ascertained by applying mean daily gage height to rating tables or for periods not covered by rating curves, by shifting-control method. Records fair. Discharge ■measurements of San Dieguito River near Del Afar, Calif., for 1913-14- Date. Made by— Gage height. Dis- charge. Date. Made by— Gage Dis- height. charge. 1913. Feb 26 W S Post Feet. 2.20 2.10 2.19 2. OS Sec.-ft. 26 11 19 13 1914. Jan. 30 Feb. 8 Mar. 8 27 W. S Post FrH. 2.42 2.00 2.61 2.45 Sec.-ft. «78 Mar 3 do do 22 14 F. C, Ebert F. C. Ebort 45 29 E. \V.Ca.?f, do 17 a Made from bridge 3 miles below gage. Daily discharge, in second-feet, of San Dieguito River near Del Mar, Calif., for 1913-14- \ 1 \ Day. ; Feb. \ Mar. : . \^x. i Day. Feb. Mar. Apr. Day. F.l . Mar. Apr. 1913. : 1 14 11 14 14 14 11 8 3 i 19 i I 5 5 21 . 1913. .-i 11 ::i ^J ..i 31 ..| 31 1 34 i 34 [) i 23 . .: 14 2 '9 2 22: 23 3 8 1 3 ;;< :::::: 4 . .. ..; 8 ' 4 24 5 ' 5 5 25 ; 6 1 2 i 2 -- 5 .. 6 26 .. . . 2 2 7 1 8 27 j 8 11 U 11 28.. '?9 1 - -. 9 10 >() 30.. 31 ..! 11 i ..| 11 1 Day. Jan. Feb. Mar. Apr. May. Day. Jati. Feb. Mar. Apr. May. 1914. 1 46 40 33 33 22 IS 14 22 33 22 14 18 14 9 2 96 96 76 76 58 58 58 42 26 26 26 26 20 20 20 50 42 34 34 26 26 26 26 20 13 13 10 13 6 4 50 50 50 26 26 26 13 13 1 16 17 18 19 20 21 22 23 24 25 28 27 28 29 30 31 1914. 2 13 13 13 6 10 4 6 6 13 20 20 20 42 67 96 58 58 42 26 13 13 13 6 26 2 3 3 10 4 2 5 6 8 . 9 10 11 12 116 106 13 14 130 75 60 15 Note. — Daily discharge determined as follows: Fel"). 26 to Mar. 2, 1913, by shifting-control method; Mar. 3 to Apr. 5, 1913, from fairly well defined rating curves; Jan. 29 to Feb. 18, 1914, and Fel-». 27 to May 19, 1914, from fairly well defined rating curves. Stream dry Oct. 1, 1912, to Feb. 25, 1913; Apr. 8, 1913, to Jan. 26, 1914; Apr. 16-22, May 11-16, and May 20 to Sept. 30, 1914. Discharge for high water Jan. 27-28, and Feb. 19-26, 1914, not computed as period was not covered by '■■"""^ — e measurements. 148 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Monthhj discharge of San Dieguito River near Del Mar, Calif., for 1912-1914. Month. Discharge in second- feet. Run-off (total in acre- feet). Month. Discharge in second- feet. Run-off (total in Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). : 1912-13. February 30 34 2 14 2.5 13.0 2.5 139 799 149 1913-14. March . 96 58 50 4 6 36.5 18.0 8.9 2,240 1 070 March . April April May.. '547 Note.— No flow October, 1912, January, 1913, and May, 1913. to February, 1914, and June to October, 1914, all inclusive. BLACK CA2TY02T CREEK NEAR MESA GRANDE, CALIF. Location. — In NE. i sec. 17, T. 12 S., R. 2 E., 1 mile above junction with Santa Ysabel Creek and about 4 miles southwest of Mesa Grande, San Diego County. Drainage area. — 15.2 square miles (measured on topographic maps). Elevation. — About 1,950 feet above sea level. Records available. — February 14, 1913, to September 30, 1918. (Discharge measure- ments only except for the years 1913-14, January to March, 1917, and 1917-18.) Gage. — Inclined staff on left bank. Discharge measurements. — ^Made by wading near gage. Channel and control. — Solid rock and boulders; fairly permanent. Diversions. — None. Regulation. — None. Accuracy. — Stage-discharge relation fairly permanent. Rating curve for 1917 is well defined below 25 second-feet. Gage read to hundredths (occasionally). Daily discharge for 1913-14 interpolated between discharge measurements and estimated from records of flow at adjacent stations in Santa Ysabel drainage basin; discharge for 1917 ascertained by applying gage height to rating table. Records fair. Discharge measurements of Black Canyon Creek near Mesa Grande, Calif., for 1913-191S. 1913. Feb. 14 15 16 21 28 Apr. May July Made by— E. W. Case.. ....do ....do K. W. Day.. do ...-do do.. F.C.Ebert.. R. W. Day.. do... ....do... ....do.... ....do.. ....do.. ....do.. ....do.. ....do.. ....do.... do.. F. C. Ebert. R. W. Day.. do ....do do do do do do ....do Gage height. Feet. LOO LOl .55 Dis- charge Sec.-Jt. 0.7 2.9 11 3.5 4.5 3 4.8 4.1 2.4 2.2 2.4 («) (a) (a) («) 1913. Oct. 1 8 15 22 29 Nov. 5 12 18 26 Dec. 3 10 17 24 1914. Jan. 3 7 14 21 28 Feb. 4 12 20 Mar. 5 11 18 25 Apr. 1 5 by- R. W. Di ....do... ....do... ....do... ....do... ....do... ....do... ....do... ....do... ....do... ....do... ....do... ....do... R. W. Day. do ....do ....do ....do ....do ....do ....do F. C. Ebert. R. W. Day. ....do do ....do ....do Gage Dis- height. charge. Feet. 0.15 .15 .15 .15 .18 .18 .21 .18 .24 .26 .24 .26 .27 .37 .33 .33 .55 1.40 .80 .93 .83 .75 '.m .75 I Practically dry. SAN DIEGUITO KIVER BASIN. 149 Discharge measurements of Black Canyon Creek near Mesa Grande, Calif., for 1913-1918- Continueci. 1914. Apr. 15 26 29 May 6 13 1915, Jan. 18 25 Feb. 22 Mar. 1 8 22 29 Apr. 5 12 19 May 11 25 June 1 July 13 20 27 Aug. 3 10 17 24 31 Sept. 8 14 21 Made by— R. W. Day do... do... ....do... do... D. A. McClung.. do. R. W. Day., do do .do. .do. .do.. do do W. J. Isbell. .do. .do., .do., .do.. ..do., ..do. ..do.. .do. ..do. ..do. .do. ..do. ..do. .do.. ..do.. ..do.. .do. .do. .do. do do F. C. Ebert., W. J. Isbell. Gage height. Feet. 0.66 .71 .81 .71 .63 Dis- charge. Sec.-ft. 3.1 2.8 5.6 3.6 2.2 4.8 24 46 25 8.9 11 6.6 4.8 4.1 33 15 11 2.9 1916. Jan. 11 Mar. 7 25 May 2 30 June H 13 20 July 11 Aug. 10 Oct. 19 1917. Feb. 13 IS Mar. 7 9 20 27 13 19 June 29 Aug. 20 Nov. 19 Dee. 24 31 1918. Mar. 8 31 May 6 Aug. 13 Made by— W.J. Isbell.. R. W.Day... do ....do W.J. Isbell.. ....do ....do ....do ....do ....do ....do ....do ....do ....do ....do ..-.do ....do ....do D. A. McClimg F.C. Ebert D. A. McClung E. A. Bartl D. A. McClung F.C. Ebert McClung and Holley . . . McGlashan and Ebert. . D. A. McClimg McClung and Campbell D. A. McClung .do F.C. Ebert. do D. A. McClung... F. C. Ebert D. A. McClung.. Gage height. Feet. 1.07 1.75 1.55 1.60 1.67 1.60 1.44 1.25 1.24 1.28 1.27 1.20 1.25 1.16 1.10 1.05 1.07 1.40 1.30 Dis- charge. 17 18 16 15 12 10 7.0 7.9 7.3 5.6 6.6 4.9 4.1 2.9 1.4 1.2 3.9 10 8.4 11 7.1 4.7 4.9 9.7 1.2 .05 .15 .37 .6 Daily discharge, in second-feet, of Black Canyon Creek near Mesa Grande, Calif., 1913-14 and 1917-18. Day. Apr. May. 1 1913-14. 2 3 4 5 6 7 8 9 10 11 12 13 2 5 14 1.5 15 16 17 18 19 ... 2 5 20 2.5 21 1.5 22 . 5 23 . 24 25 26 27 28 29 30 31 .2 .2 .2 1.5 1.5 1.5 2 2 1.5 1.5 1.5 1.5 2.5 5 40 175 36 20 5.5 5.4 3 2.8 2.8 2.5 2.5 2.5 2.5 2.5 125 54 250 100 75 50 40 30 25 15 14 13 12 7.5 7 6.7 6.5 6.2 5.8 5.5 5.3 5.0 4.8 4.8 4.8 4.7 4.7 4.6 4.6 4.6 4.6 5.0 5.0 6.3 6.0 5.8 5.5 6.3 6.0 4.7 4.5 4.3 4.1 3.9 3.7 3.5 3.3 3.1 3.1 3.1 3.0 3.0 3.0 2.9 2.9 2.9 2.8 2.8 2.8 3.0 3.0 5.6 6.0 6.0 5.0 4.5 4.0 3.8 3.6 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.1 2.1 2.0 1.9 1.9 1.8 1.7 1.7 1.6 1.5 1.5 1.4 1.3 1.3 1.2 1.1 1.1 1.0 150 SUIIFACE WATER OF PACIFIC SLOPE, SOVTH--:eN C-^LLIFOR>n"IA. Daily discharge, in second-feet, of Blach Canyon. Creel ne.a jL^h Gnutde. Cruif.; 1912-14 and 1917-18 Continued. Day. Jan. Feb. Mar. i "'- Jan. Feb. r^ay. T-Ti. ' Feb. j Mar. 1917. 1 1 11 1 12 ! 13 ' 14 1917. 4.0 3.9 4.0 21. 22 1917. 2 1 16 1.^9 3 23 1 } [ 77 7 4 I 24. 25 5 ' .. ' ifi 6 i -10 13 9 26 i-; 27 28 7. 1 3.5 3.8 8.0 ' 17 ' 4.7 8.- ! 3.8 3.0 3.0 -ll- i I''' 10 13 32 9 - ! 19 1 20 29. 30. 31. 10 ! '" i * 1 Day. Nov. Dec. Jan. Feb. Mar. Apr. May. June. J ivy. A,,^. Sept. 1917-18. 1 : 0.2 0.8 1.6 6 2 0. 2 3 1 1 2 8 4 0.2 2.2 ■■"'.■2' "'"6."6' ) "i 1.6 4.2 j .5 0,1 J s ' 1 4.2 28 2 8 1.6 R .2 ' 9.. . . 4.2 2. 8 .1 10 .2 .2 11 .3 517 540 42 1.1 12 2.8 13 6 1.1 .1 14 2.. .6 .1 1.'') .6 n ' .3 9 3.5 .2 - 17.. . .2 : 2.2 18 6 8 .6 19 2.8 • i ,....-. 20. 1. 1 30 2.8 < 21 1 . ... .5 ■' 22 .3 12 23 3.2 .1 .1 :....... 24 .2 , 2.2 1 25 4.2 4.2 .3 "".1 26 8 3.5 ■■■2.'2" 27 2.8 .1 .1 28 .2 ....'!. 29 7 7 j 30 .6 3.2 31 t •' i 1 1 Note.— Daily discharge Not. 13, 1913, to May 31, 1914, obtainrd ])y iiittrpcu ' !■ n :)i tv-cen measuremcnta and by com-i:)arlson with records ol flow at otber stations in the Santo fsab. i i ';;?;--i. Stream dry, Oct. 1 to Nov. 12, 1913, and practically dry during August and Sopteml)er, 1914. lor d 'scbargo for Juno and July, 1914, .se? montbly discharge table. Monthly discharge of Blade Canyon Creel: near Mesa Grande, Calif., for 191S-14. October November. . December . . January February... March April Mean discharge in second- feet. .13 10.4 7.04 3.96 Him-off (total in acre- feet). 433 236 May June July August September. . The year.. Mean Run-off discharge (total in in second- acre- feet. ,ee.). 2.41 148 1.0 60 .15 9 9 SAN" DiEGUITO FJYER BASIN. 151 TEMESCAL CREEK 3TEAR ALMOND^ CALIF. Location. — In NW. | sec. 23, T. 12 S., R. IE., about 400 feet above junction with Santa Ysabel Creek and 1^ miles south of Almond, San Diego County. Drainage area. — 31.5 square miles (measured on topographic maps). Elevation. — About 975 feet above sea level. Records available.— February 15, 1913, to November 30, 1915. ( Discharge measure- raents only for year 1912-13.) Gage. — Inclined staff on right bank. Discharge measurements.— Made by wading near gage. Channel and control. — Sand; shifting. Extremes OP discharge. — 1913-1915: Record too incomplete to show maximum stage during period; maximum mean daily discharge for period estimated 300 second-feet, February 21, 1914; no flow for several months each year. Diversions.— None. Regulation. — None, Accuracy. — Stage discharge relation not permanent. Gage read to hundredths about twice a week. Daily discharge interpolated between discharge naeasure- ments or estimated from record of flow at station on Santa Ysabel Creek near Ramona. Records fair. Disch arge w east i rements of Ten escal Cr eek near Almond, Calif., for 191-:-191 '^■ Date. Made by— Gage height. Dis- charge. Date. Made by— Gage height. Di.s- charge. 1913. Feb. 15 W. S. Post........ Feet. Sec-n. 0.8 3 7 2.1 LO 1.0 .9 1.0 .8 .8 .6 .6 .6 .4 .4 .4 .2 .2 .4 .2 .2 .2 .2 .1 .1 .1 .1 .1 .0 .0 a. 05 .02 .0 .1 O.02 .1 .1 .05 .1 2.5 .1 .1 .1 .3 .0 1914. Jan. 8 16 22 27 29 Feb. 1 R. W. Day Feet. 0.58 .64 .57 2.41 L75 L47 1.47 1.42 1.44 -2.10 1.90 1.95 1.74 L70 1. 57 1.54 1.54 1.45 1.35 1.-27 1.26 1.20 1.18 .95 1.09 1.07 1. 05 L82 2.48 2. 01 1.90 1.57 1.39 L25 .94 .71 :68 -.14 -.37 -.31 -.36 -.34 -.36 -.24 -.29 Sec.-ft. 0.3 22 25 Mar. 7 R. Yf. Day do do 0.67 .59 .63 .62 .60 .60 .60 .60 .60 .61 .62 .60 .60 .61 .57 . 53 . 55 52 .48 .44 .48 .43 .47 .44 .50 54 .50 .48 .52 .51 .47 .44 . 50 .50 .51 .52 .47 .51 .48 .49 .73 .51 .51 .53 .53 .73 do do do.... .0 .4 235 11 do . .do 12 18 F, C. Ebert do 2.7 21 R. W. Day do.. 5 .. .do 1.6 25 10 17 24 Mar. 3 4 11 19 do...;:;;::::;:::;:: LO Apr. 1 9 do do.... .9 do do 25 16 do do 7.5 22 ... .do F. C. Ebert 7 8 29 do R. W Dav May () 11 do do 3 4 F. C. Ebert . 26 31 Apr. 6 13 27 do 2 7 17 R.W.Day do do do.. . 6.3 23 27 do do 3.6 2 8 June 4 .. .do do 3 12 16 do F. C. Eberfc May 1 4 11 Aug. 26 1915. Jan. 10 17 24 Feb. 6 13 20 27 Mar. 6 12 20 Apr. 2 17 17 June 1 July 13 Aug. 10 24 Sept. 28 Oct. 12 26 Nov. 9 30 do 4.5 . ..do.... 3 2 2() R. W. Day do 2 1 July 2 ....do....: do do do W. J. Isbeli 1.6 01 14 D A McClung 22 ... .do 29 do .. ,. do do. " 18 . „ .do.... do 9 22 do .. ..do.... 8 6 28 Sept. 2 F. C. Ebert R.W.Day do do do... do do do. do.. do do R.W.Day... 36 20 9 do... 16 20 do 28 2r> .. .do.... 14 Oct. 2 9 do do.... . 12 6 fl 19 do 4 4 8 1 1 r 23 28 do W. J. Isbeli . 4 Nov. (i do do 13 do . ..do.... 1 23 do do s Dec. 2 11 do ....do do .do. .. 4 18 do do •^ 23 do do.... 5 do 7 b Nearly dry. 152 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Temescal Creeh near Almond, Calif. , for 1913-1915» Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1913-14. 1 0.1 !05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 '.2 .2 .2 0.05 .1 .1 .i a .1 .1 .1 .05 .05 .05 1.0 2.5 1.5 .5 .1 .1 .1 2.5 2.5 1.5 .5 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 2.0 1.0 .7 .4 .1 .2 .4 .6 .8 1.0 .8 .7 .6 .5 .4 .3 .2 .2 .2 .3 .3 .4 0.1 '.2 .3 .3 .3 .3 .3 .3 .3 1.0 .6 .4 .2 .2 .2 .2 .2 .2 .2 .4 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .8 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 .9 .8 .7 .6 0.2 .2 .2 .2 .2 .2 .2 ■:i .3 .3 .3 .3 .3 .6 .6 .6 .8 .9 .6 .4 .4 .4 1.0 2.5 50 235 20 12 6.0 4.0 .5 .5 .5 .5 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .7 2.5 1.5 .9 2.0 1.5 1.5 2.0 75 40 12 2.7 2.0 1.6 1.6 1.6 1.6 1.0 1.6 1.0 1.0 1.0 1.0 1.0 .9 .9 .9 .9 .9 150 50 300 150 75 25 20 15 10 10 8 20 15 12 10 8.5 7.5 7 7 75 125 50 36 25 18 18 19 14 12 20 20 15 14 16 25 17 16 13 9 8 7.5 7.8 7.4 7.0 6.5 6.1 5.7 5.4 5.0 4.8 4.6 4.4 4.2 4.0 3.8 3.6 3.4 3.3 3.2 3.1 3.0 2.9 2.8 2.7 3.0 3.0 6.0 9.0 6.3 30 40 24 24 23 23 20 18 16 18 15 14 13 12 12 11 11 11 12 12 12 12 11 11 11 12 12 11 10 9 8 6.0 6.0 5.4 4.8 4.2 3.6 3.5 3.4 3.3 3.2 3.1 3.0 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.9 2.9 2.9 2.9 3.0 3.0 3.0 3.0 3.0 3.0 4.5 8 7 6 6 5 5 5 5 5 4.5 4 4 4 10 15 10 10 8 7 7 7 12 40 4.5 4.0 3.5 3.2 2.8 2.4 2.1 2.0 1.8 1.7 1.6 1.6 1.5 1.5 1.4 1.4 1.3 1.3 1.2 1.2 1.1 l.l 1.0 1.0 .9 .9 .8 .8 .7 .7 .7 52 65 57 40 33 30 2? 25 24 23 22 22 22 21 21 20 20 19 18 18 18 18 17 17 16 15 14 13 12 11 11 2 3 4.. 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 ... . 30 31 1914-15. 1 .. 9 10 10 9 9 8 8 8 7 6 6 6 5 5 5 5 4 4 4 4 4 4 4 4 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3 3 3 3 2.5 2.5 2.5 2 2 2 • 1.5 1.5 1.5 1.5 1 .9 .8 .8 .8 .8 .8 .8 .8 0.8 .8 .7 .7 .6 .5 .4 .3 .2 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 .8 .8 15 1 .5 .5 .4 .4 0.3 2 .3 3 .3 4 .3 6 .3 6 .3 7 .3 8 .3 9 .3 10 .3 11 12 13 .3 .3 .3 14 .3 15 .3 16 .4 17 .4 18 .4 19 .A 20 .4 21 .4 22 .4 23 .4 24 .4 25 .4 26 .4 27 .4 28 .4 29 .4 30 .4 31 SAN DIEGUITO RIVER BASIl^. 153 Monthly discharge of Temescal Creek near Almond, Calif., for 1913-1915. Month. Discharge in second- feet. Run-off (total in acre- feet.) Month. Discharge in second- leet Run -off (totalin Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. acre feet.) 1913-14. October 0.077 .483 .23 10.9 29.6 5.05 3.44 1.67 a. 70 a. 10 5 29 14 670 1,640 311 205 103 42 6 1914-15. October November December January February March 0.2 2.0 1.0 75 125 40 40 65 10 3.5 15 .4 0.1 .1 .4 .5 7 8 4 11 3.5 .8 .1 .3 0.11 .43 .70 4.88 23.0 15.4 7.98 23.9 5.63 1.68 .83 .35 7 26 December 43 300 Februarj''. . 1,280 March 947 April April . 475 May. May 1,470 June 335 July. July 103 51 The year 4.18 3,020 September The year . . 21 125 .1 6.98 5,060 a Estimated. Note.— Stream dry during August and September, 1914. EAST SAN PASQUAL DITCH NEAR SSCONDIDO, CALIF. Location. — In NE. \ sec. 36, T. 12 S., R. 1 W., a short distance below intake, at upper end of San Pasqual Valley, 9 miles southeast of Escondido, San Diego County. Records available. — 1912 to 1914. Gage. — Stage was determined by measuring distance to water surface from reference point at top of flume. Discharge measurements. — Made from foot plank across flume at gage. Channel. — Considerable silt from the Santa Ysabei is deposited in the ditch. Accuracy. — Stage-discharge relation not permanent. Gage read to hundredths once daily. Daily discharge for year 1912-13 was computed from rating curves cover- ing short periods, by shifting-control method, and by interpolation between discharge measurements. Records fair. The intake of East San Pasqual ditch is on left bank of Santa Ysabei Creels: near mouth of canyon. August 15 to January 15, it is entitled to entire flow of Santa Ysabei Creek. During remainder of year it has a right to divert 16 second-feet for 10 consecutive days out of each 30. The water is used for irrip:ation in San Pasqual Valley. Discharge raeasurements of East San Pasqual ditch near Escondido, Calif., in 1912-1914. 1912. May 2 June 8 22 1913. Jan. 20 24 Feb. 14 Mar. 13 19 Apr. 10 May 5 12 20 June 2 12 16 23 July 1 Oct. 27 Nov 3 Made by- F. C.Ebert. W. S. Post.. E. W.Case.. F. C.Ebert. ..do ..do ..do ..do ..do R. W. Day.. F. C.Ebert. R. W. Day.. do. do. F. C.Ebert. R.W.Day.. do do do height. .54 .27 .70 .53 .60 .64 .63 1.33 1.15 Dis- charge. Sec.-ft. 12.1 3.5 2.9 9.3 6.0 6.4 4.0 3.8 3.7 2.3 .0 .0 .0 .0 1913. Nov. 10 21 Dec. 5 15 26 1914. Jan. 5 12 19 30 Feb. 27 Mar. 6 13 27 3 10 17 24 May 8 June 12 Apr Made by- R. W. Day do.. , do.., do.. do... ....do.. ....do.. ....do.. ....do.. ....do.. ....do.. ....do.. ....do.. ....do.. ....do.. ....do.. ....do.. ....do.. Gage height. 1.13 1.45 1.24 1.25 1.18 1.26 Dis- charge. Sec.-ft. 0.0 3.0 .0 .0 .0 .0 .0 .0 .0 .0 10 16 .0 .0 12 12 3.0 154 SURFACE WATER OF PACIFTC SLOPE, SOFTHER'K- CALIFORI, 4,600 second-feet. SAN LUIS KEY EIVER BASIK. 187 Daily di&chm'ge,in seco7id-feet, of San Luis Rey River near PaJa, Calif., for 1906-1916 — Continued. 1.88 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of San Luis Rey River near Pala, Calif., for 1906-1916— Continued. Bay. Jan. Feb. Mar. Apr. May. June. Day. Jan. Feb. Mar. Apr. May. June. 1910-11. 1 5 5 5 5 5 5 5 5 5 158 274 375 150 30 45 29 49 72 1,130 308 200 140 100 75 65 60 70 80 210 200 146 138 200 778 262 161 140 140 160 350 805 400 161 150 140 80 300 150 100 90 90 170 280 160 100 65 43 43 38 35 18 15 14 16 14 14 14 14 13 13 12 12 12 14 14 10 11 9.6 10 10 9.6 7.2 7.2 6 6.4 6.8 5.7 6 6.4 5.4 1910-11. 16 45 30 20 10 10 10 10 10 10 10 140 60 30 30 25 25 181 170 160 160 150 140 170 510 280 170 145 146 216 135 130 125 120 115 110 110 105 105 100 95 90 90 85 85 80 37 35 33 30 30 33 33 32 29 28 98 74 63 21 20 12 12 12 9.2 6.4 5.7 6.8 8.0 8.0 8.0 8.4 8.4 7.6 8.8 9.2 10 5.4 4.8 4.5 5 1 2 17 3 18 , 4 19 5 20 5.4 5.4 6 21 7 . - 22 6 8 23 5.4 9 24 6 10 25 6 11 26 6 12 . . 27 6 13 28 6.8 14 29 6.4 15 30 ... 6 31 Day. Oct. Nov, Dec. Jan. Feb. Mar. Apr. May. Jmie. July. Aug. Sept. 1912-13. 1 9 9 9 9 9 9 6 6 6 .6 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 10 11 12 13 14 14 14 14 14 86 86 60 28 24 14 14 11 11 11 11 11 9 9 9 9 9 11 11 11 11 11 11 14 17 17 18 15 14 12 11 10 9 9 9 9 9 14 88 46 28 32 36 36 33 31 28 24 17 17 17 17 17 20 24 28 36 46 36 24 20 17 14 14 14 11 14 14 28 41 17 14 14 11 11 11 11 11 11 11 14 14 14 14 11 9 9 9 ■ 9 9 9 9 14 17 11 9 9 6 6 6 6 6 6 6 9 9 8 8 7 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 4 4 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 4 4 4 5 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 . 3 3 3 3 3 3 3 3 3 3 3 3 3 3 , 3 3 3 3 3 3 3 3 3 3 3 3 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 2 10 2 11 , ..„. 2 12 2 13 . . 2 14 6 6 6 6 G 6 6 6 6 5 I 6 6 6 9 9 2 15 2 16 2 17 2 18.... 2 19 2 20 3 21 3 22 3 23 3 24 3 25 3 26 3 27 3 28 3 29 3 30 r^ 5 31 SAN LUIS KEY RIVEK BASlK. 189 Daily discharge, in second-feet, of San Luis Rey River near Pala, Calif., for 1906-1916- Continued. Day. Oct. Nov. Dee. Jan. Feb. Mar. Apr. May. Jiine. July. Aug. Sept. 1913-14. 1 5 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 3 3 3 3 3 3 2 2 2 2 2 2 2 2 2 3 4 5 5 5 4.5 4 3.5 3.5 3 3 3 3 3.5 3.5 3.5 ■4 4 4 4.5 4.5 5 5 5 5 4.5 4.5 4.5 5 5 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 4 5 5 6^ 7 7 7 7 7 7 7 6 5 5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 6 6 6 7.5 7.5 6 4.5 4.6 5 5 5 5 5 5 5 5 5.5 5.5 6 6 6 4 3 3 4 4 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 6 8 10 10 10 9 9 9 7 9 10 9.5 10 6 6 6 8 8 8.5 8.5 8.5 8.5 8.5 9 9 9 9 9.5 13 10 8 8 9 9 8 8 7.5 7.5 7.5 7.5 7.5 7.5 10 10 10 10 10 10 10 10 10 12 10 9 9 10 11 30 15 26 23 18 16 14 13 13 29 470 1,190 540 280 146 110 6.5 6.5 6.5 6.5 6.5 6.5 6 6 6 6 6 6 6 6 6 6 6 6 6 6 8 38 42 15 20 28 16 16 975 1,560 660 72 64 58 44 40 40 40 40 40 40 40 40 40 40 40 40 40 55 714 820 2,910 840 515 355 280 212 154 148 475 1,290 525 311 247 207 161 66 207 1,760 3, 300 1,760 790 500 427 333 289 227 215 311 500 427 356 311 289 289 289 289 136 124 93 80 57 47 44 44 43 47 47 40 34 30 28 29 30 29 28 28 28 28 28 28 28 28 30 71 100 184 117 289 379 690 500 451 451 403 356 333 356 289 268 247 247 227 207 188 184 176 168 168 161 154 144 141 134 134 151 168 151 134 40 31 32 39 46 44 42 39 39 39 38 36 34 33 33 33 33 33 33 33 82 93 51 46 35 31 30 32 35 134 118 103 103 9S 100 98 87 73 69 66 64 64 63 77 90 73 71 68 60 98 550 333 289 247 223 176 176 207 356 47 35 26 22 20 20 20 19 18 18 17 17 16 16 15 15 14 14 13 13 12 11 11 10 10 9 9 8 8 8 8 680 790 . 660 602 975 722 602 575 550 525 475 451 403 333 289 289 268 311 289 288 247 239 219 125 211 207 203 195 191 180 168 7 6 6 6 6 6 5 5 5 5 5 158 151 141 134 125 112 103 95 85 77 77 77 66 66 56 47 38 38 38 38 38 30 30 30 23 23 21 18 15 4 4 4 4 4 4 4 4 4 4 4 4 4 3 3 3 3 3 3 3 2 2 2 2 2 2 2 2 2 30 5 13 13 13 13 13 13 13 13 •13 13 12 12 12 12 10 7 6 6 6 6.5 7 7 7 7 7 7 7 7 7 7 7 4 4 4 4 4 3 3 3 3 3 2 2 2 2 1 6.5 6.5 6.5 6 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6 6.5 6.5 6.5 7 6 6.5 6.5 9 . 14 10 9 7 5 6.5 1 ^ 1 3 I 4 5 2 2 6 2 7 3 8 3 9 3 10 2 11... 12 13 14 15 16. 17 18 19 20 21 1 22 2 23 2 24 3 25 2 26 1 27 1 28 1 29 1 30.-.. 1 31 1914-15. 1 6.5 2 7 3 8 4 8 5 7 6 6 7 .. 6 8 6 9 6 10 6 11 6 12 6 13 6 14 6.5 15 6.5 16... • 6.5 17 6.5 18 6.5 19 6.5 20 6.5 21 6.5 22 7 23 7 24 - 7 25 7 26 7 27 6.5 28 6 29 5.5 30 5.5 31 190 SUEFACE WATER OF PACIFIC SLOPE, SOUTHERI^ CALIFORNIA. Daily discharge, in second-feet, of 8 an Luis P^ey River near Pala, Calif., for 1906--1916— Continued. Day. Oct. Nov. Dec. Jan. Day. Oct. Nov. Dec. Jan. 1. 1915-16. 5 5 5 4.5 4.5 4.5 5!5 5. 5 5.5 6 6 6 6 6,5 I' - 10 9.5 9.5 9 8 8.5 8,5 16 36 20 14 12 11 9 11 11 11 16 35 18 18 27 18 18 26 25 18 34 119 289 161 99 92 311 191.5-16. IC 5.5 5.5 5.5 6 6 G 6 6.5 6.5 6.5 6.5 6.5 6 6 6 7 7.5 7.5 7.5 7.5 7.5 7^5 7.5 8. 8 8 S 31 16 S.5 8.5 7.5 7.5 7.5 7 7 7 7.5 9 25 24 1,660 2 . ,. 17 3 18 4 .... 19 5... 20 6 21 7 , 22 .... 8 23 9 24 10. 25 11. 26 12 27 13 ... 28 14 29 15 --- 30 : 31 Note. — Daily discharge dei:crmined as follows: 1907, from ratiiis; curves covering short periods. 1908, by shifting- contro! m_ethod. 1909-10: Jan. 1 to Feb. 13, 1910, from fairiy vveU defined curves. 1910-11: Feb. 14 to June 30, Jan. 1 to Feb. 4, 1911, Feb. 5 to Mar. 4, Mar. 5 to Tuuj 3 ), hym fairly v/ell de- fine rating cm'ves; no record July to December in 1910 and 1911. Discharge interpolated for days on which gage was not read in Jamiary to June, 1010. Discharge esti- mated from hydrographs of neighboring streams for days on which gage v/ as not read in January to June, 1911. Since installation of concrete control in September^ 1912, dischargo lias l>3e]i computed from rating curves well defined except for high v/ater. Recording gage not in operatiuii 'Jay .*, to September 30, 1914, discharge estimated by interpolation between measurements and by comparison of flow near Mesa Grande. 1914-15: Oct. 1, 1914, to July 8. 1915 and July 13 to Sept. 30 computed from two rating curves well defined below 1,000 second-feet: high-water extension of rating curve determined from study of record of fiow on San Luis Rev River near Mesa Grande and high-water curve for 1910. 1915-16: Oct. 1, ]915, to Jan. 16, 1916, from two fairly well defined rating ciu'ves. No gage record after Jan. 16, 1916, dischai'ge estimated from meaaa rainfall computed for drainage aroa and compared with records of flow at stations on San liUis Rey Rivet near Mesa Grande and Oceanside. Monthly discharge of San Luis Rey River near Pala, Calif, for 1903-1916. Discharge in second-feet. Run-off (total in acre- feet.) Month. I3ischargF in second-feet. Run-ofl (totalin acre- feet.) Month. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. 1903-4. October (23 days) November.... December January February March 1.5 1.5 1.5 1.5 2.5 348 104 35 12 9 2 2 1.5 1.5 20"'' 12 9 3 2 2 1.1 1.4 1.2 1.5 2 41.6 43.6 16.2 10.8 3.8 2 2 50 83 74 92 115 2,558 2,595 996 643 234 123 119 1905-6. October November.... December .January February March April 3.8 96 47 232 241 13, 000 620 260 128 19 43 19 2.8 3.8 10 9 10 17 114 3.2 17.8 18.3 21.4 28.6 1,120 301 197 1,059 1,125 1,320 1,590 68,900 17. 900 April May 100 158 19 65. 6 19 19 3 10.3 9,720 May June 3,900: ! July - .. 1, 170 July August September.... The year 3906-7. ' October i November — December \ January ; February 1 March April 633 August September.... 3 3. 7 220 13, 000 2.8 • 147 The period.. 7,680 1904-5. October November.... December January February Marcli .... April 13 3 5.5 66 711 4,265 139 282 35 9 3.5 3 2 2 2 3 13 2 27 27 11 3 3 2.5 2.5 2.4 3.7 19.1 151 336 64.9 88.1 23 4.1 3.0 2. 6 154 143 227 1,174 8,386 20,660 3,862 5,417 1,369 252 184 155 3 28 550 2,800 910 2,100 410 98 40 7.6 2.4 4.5 3 3 9 151 79 85 98 33 8 1 . .6 1.8 L 79. S 541 154 329 167 62.5 22.8 3.27 1.42 2.22 184 494 4,880 33,300 8,550 20,000 9,940 M^y .... 1 May 3, MO 1,360 Julv July - ... 201 August - September.... August September.... The year.... 87 132 The year . . . 4,265 2 58.4 42,000 2,800 .6 114 83,000 SAI^ LUIS KEY mYEB. BASIN. 191 Monthly discharge of San Luis Rey River near Pala, Calif., for 1903-1916 — Continued. Discharge in second-feet. Maxi- mum. Mini- mum. Run-off (total in acre- feet.) Disebarge in second- feet. Maxi- Mini- mum. m.um. Run-ofl (total in acre- feet.) 1907-8. October November December January February March '. . . April May June July August September The year . . . October November.. December . . January February... March ..'.-.. April May June July August September.. 22 480 544 169 28.1 27.8 13.3 62.6 175 ^1.1 21.3 13.2 7.4 3.0 3.4 2.0 1,730 1,650 818 3,850 10, 100 3, 760 1,270 812 440 184 209 119 5 7 12 5,240 930 425 182 44 8 7 110 67 34.8 24,909 3.5 0.1 8.6 198 332 137 91.0 27.6 6.23 5.35 5.13 5.00 215 363 529 12,200 18,400 8, 420 5,410 1,700 371 329 315 The year.. 1909-10. October..... November.. December . . January February March April May June 68. J 5 23 350 3,770 100 259 89 20 7.2 The period. 1911. January . . . February. . March April May June 375 1,130 805 300 18 11 The period, 5 13 119 41 35 21 6.6 4.8 5 29 5.7 4.5 5.00 12.4 107 431 66.7 70.6 .51.1 9.99 5.47 307 738 6,580 26,. 500 3,700 4,340 3,040 614 ?25 46, 100 1912-13. November... December . . . January February March April May Jime July August September... The period 1913-14. October November... December — January February March Acril M'ay June .July August September... The year. 1914-15. October November.. December . . January February... March April May June July August September.. 10 1,190 2, 910 184 93 47 7 30 13 1,.560 3,300 690 550 975 158 13 14 50.1 192 187 78.0 11.3 6.75 3,080 10,700 11,500 4,640 695 402 31,000 The year 1915-16. October November December . . . January The period 18.5 19. (> 20.9 9.8 5.6 3.9 2.9 3.0 2.4 40 28 30 2.8 4.0 6.3 99.5 277 55. 1 41.3 16.1 5.0 4.1 1.9 1.5 3 4.5 4.18 5.28 8.37 113 577 260 144 397 67.6 9.56 7.03 6.50 4.5 6 209 529 1,140 1,090 1,290 583 344 232 178 184 143 5,920 172 238 387 6-, 120 15,400 3,390 2,'tr>o 990 298 2.52 117 257 314 515 6,9.50 32,000 16,000 8,570 24,400 4,020 588 432 387 94,400 343 448 824 201,000 203,000 SA£T LUIS REY RIVES, AT PALA, CALIF. Location.— In NW. \ SE. \ sec, 2&, T. & S., R. 2 W., at highway bridge on Escon- dido-Pala road at Pala, San Diego County. Drainage area. — Not measured. Elevation. — About 400 feet above sea level. Records available. — ^April 1 to June 17, 1912. Gage. — Painted on right wing wall just above bridge. Discharge measurements. — Made from bridge or by wading. Channel kist> control. — Sand; shifting. Diversions. — See San Luis Rey near Pala (p. 182). In addition Pala Indian Reser- vation canal, on left bank San Luis Rey River, diverts water three-fourths mile above bridge for irrigation. The intake of Morena ditch is on right bank one- fourth mile below bridge. Regulation. — None. 192 SURFACE WATER OF PACIFIC SLOPE, SOUTHERIn^ CALIFORNIA. Accuracy.— Stage-dischar ge relation not permanent. Gage read to hundredths once daily. Daily discharge computed from two rating curves covering short periods and by shifting-control method. Records fair. Discharge measurements of San Luis Rey River at Pala, Calif., for 1912. Date. Made by — height. Dis- charge. Date. Made by— Gage height. Dis- charge. Mar. 28 H. L. Davis Feet. (a) 2.92 3.45 Sec.-ft. 64 61 126 May 14 June 15 E. W.Case Feet. 3.00 2.80 8ec4, Apr. 2 20 E. C. Ebert H. L. Davis .5 H. L Davis.. a Not referred to gag( Note. — Measurements made by wading near gage. Daily discharge, in secon dfeet, ofS an Luis Rey River at Pala, Calif, for 1912 Day. April. May. June. Day. April. May. June. Day. April. May. June. 1 78 58 53 48 50 46 29 29 35 46 50 48 29 20 12 12 12 127 200 140 0.5 .5 .5 .5 .5 1.6 '.5 .5 .5 11 205 168 133 154 147 183 184 163 143 114 97 79 48 29 20 0.5 12 24 24 24 .5 .5 .5 .5 .5 1.0 1.6 21 97 90 83 68 62 62 60 58 58 52 12 10 6.2 6.2 .5 .5 .5 .5 .5 .5 .5 2 12 22 3 13 23 4 14 24 5 15 25 6 16 26 7 17. 27 8 18 28 9 19 29 10 20 30 31 NoTK.— Daily discharge determined from rating curves applicable as follows: Apr. 1-10, 1912, poorly defined; Apr. 20 to June 17, 1912, fairly well defined. Shifting-control method used Apr. 11-19. Monthly discharge of San Luis Rey River at Pala, Calif ., for 1912. Month. Discharge in second-feet. Run-off (total in acre-feet). Maximum. Minimum. Mean. A pril : 205 200 1.6 29 .5 .5 91.9 33.7 .66 5,470 May . . . . 2,070 June 1-17 22.3 SAN LUIS HEY RIVER AT BOITSALL, CALIF. Location. — In SW. \ sec. 20, T. 10 S., R. 3 W., at concrete highway bridge at Bonsall, San Diego County, just above Moosa Canyon, 14 miles below gaging station near Pala, and 14 miles above mouth of river. Drainage area.' — 465 square miles (measured on topographic maps). Elevation. — About 150 feet above sea level. Records available. — April 16, 1912, to January 31, 1916. Gage.— Staff in three sections on left bank at bridge, in use January 23 to March 25, 1915, and October 1, 1915, to January 15, 1916. Gage previously used was in three sections on right bank 150 feet below bridge. Original datum has not been maintained. Discharge measurements. — Made from highway bridge or by wading. Channel and control, — Sand; somewhat shifting. Extremes op discharge. — 1912-1915: Maximum stage, 7.0 feet February 11, 1915 (discharge, 9,000 second-feet); maximum stage for 1916 not known, as all equip- ment was destroyed by the flood of January, 1916. No flow for several months each year. SAN" LUIS REY EIVER BASIl^T. 193 Diversions. — See San Luis Rey River near Pala (p. 182). In addition, Morena ditch and Pala Indian Reservation canal divert water in the vicinity of Pala for irrigation. Water for irrigation is also pumped from wells along the river. Regulation . — None. Accuracy. — Stage-discharge relation not permanent. Rating tables fairly well defined except for flood stages. Gage read to hundredths twice daily. Daily discharge ascertained by applying mean daily gage height to rating tables cover- ing short periods, by shifting-control m(*hod, or interpolated between discharge measurements for periods when the change in stage was slight. Records fair. Discharge measurements of San L ids Rey River at Boiisall, Calif. , for 1912-1916. Date. Made by— Left bank gage. Gage height. Dis- charge. Date. Made by- Le/t bank gage. Gage height. Dis- charge 1912. Feet. Fed. Sec.-ft. 1914. Feet. Feet. Sec.-ft. Aor. 16 F. C. Ebe H.L. Da F. C. Ebe E. W. Ca F. C. Ebe E. W.Ca F. C. Ebe rt 1.88 1.93 1.61 1.60 1.53 1.29 1.40 219 174 48 44 16 .3 3.2 Dec. 14 22 1915. Jan. 10 23 24 25 F.C. Ebert do Lee and Sleppy... 1.76 1.96 1.02 1.02 1.02 1.25 1.08 1.22 2.3 ^ 19 vis 10 May 3 rt 14 36 . 22 rt 12 June 15 6 F.C.Ebert^...... do do 2.07 1.88 1.91 65 Dec. 19 rt 33 38 1913. Feb. 1 K.B. Sleppy 1.48 571 Jan. 16 F. C. Ebert 1.75 97 5 do 2.55 1.71 268 17 do 1.63 62 11 F.C. Ebert 4.28 3.30 3,2.30 19 do 1 45 25 12 do 3.65 2.48 2,220 24 do 1.35 9.1 13 do 2.90 1.84 790 25 do 1.39 11 14 do 2.65 1.76 616 Feb. 14 do 1.42 12 27 do 2.40 1.43 304 20 do 1.40 9.8 Mar. 1 do 2.45 1.50 602 21 do 1.43 15 2 do 3.20 2.20 1,380 22 do 1.60 41 11 do 2.43 1.61 312 Mar. 12 do 1.40 31 26 do 2.24 1.53 123 15 Case and Mc Fad- Apr. 7 do 2.24 1.48 101 den , 1.51 1.44 1.39 28 21 12 17 27 May 6 D. L.Lee 1.46 1.58 2.06 71 21 F. C. Ebe do... rt W.J. Isbell 132 Apr. 8 W.D.McFadden 943 19 H. D. McGlashan. 1.35 9.6 16 F.C. Ebert 2.54 1.78 237 May 9 F.C. Ebert 1.20 .3 21 do 2.41 1.73 232 June 13 do 1.13 a. 2 July 6 13 Aug. 2 Yv^ E. Keenan.... F.C. Ebert 1.82 1.23 8.0 ,7 1914. do b.O Jan. 17 F.C. Ebert 1.31 7.3 Dec. 2 do ' 1.94 8.7 24 do 1.34 16 13 do 1.96 15 31 do... 1.25 147 22 H. D. McGlashan 1.94 17 Feb. 4 do... .97 51 Mar. 1 do... 1.26 200 1916. 10 do... 1.12 64 Jan. 13 MeFadden and 28 do... 1.02 .97 1.10 44 12 43 Feb. 6 2.18 77 Apr . 18 do... do... G. S. Strout 955 25 May 9 do... 1.01 20 14 do... .95 10 o Estimated. & Stream dry. Daily discharge, in secondfeet, of San Luis Rey River at Bonsall, Calif. , for 1912-1916. Day. Apr. May. Jime. Day. Apr. May. June. Day. Apr. May. Jime. 1912. 1.. 58 19 27 14 14 14 14 77 170 160 L8 1.8 1.8 LO 1.0 LO .6 .0 LO 1.0 1912. 11 109 58 40 40 58 LO LO LO LO LO 1.0 LO .0 .0 .0 1912. 21 126 109 70 70 70 47 77 35 27 70 14 14 12 6.0 5.0 5.0 5.0 3.0 3.0 L8 LO 0.0 .0 .0 .0 .0 .0 2 12 22 3 13. 23 4 14 24 . 5 15 25 6 16 202 218 228 151 117 26 7 17 27 8 18- 28 ' () 9 19 29 10 20 30 31 142131°— 21— wsp 447- -13 194 SURFACE WATER OF PACIFIC SLOPE, SOUTHERIs" CALIFORNIA. Daily discharge, in second-feet, of San Luis Hey River at BonsalL Calif , for 1912-1916- Continued. Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1912-13. 1 3 8 8 8 3 14 14 14 14 27 14 27 27 27 14 77 53 53 30 30 14 14 14 14 14 14 14 10 14 14 14 5 4 5 4 4 4 4 4 4 4 5 5 4 4 5 7 7 15 30 25 20 16 16 16 27 380 1,530 455 245 166 147 14 10 14 10 14 14 30 42 53 32 16 10 10 10 10 6 10 10 10 10 16 105 70 56 70 195 150 154 128 92 76 51 46 46 46 46 46 33 33 33 33 33 33 33 33 33 510 990 2,820 ■■■2i6" 157 140 40 33 36 39 30 23 25 27 22 23 17 16 14 22 22 22 22 14 22 22 22 22 53 53 53 53 30 30 14 200 210 200 190 180 135 125 115 100 64 64 64 64 64 64 64 49 34 34 34 34 34 34 34 34 34 34 44 121 120 137 14 14 14 14 14 14 14 14 14 14 14 13 13 12 12 11 11 10 10 9 9 1 7 6 5 4 3 2 1 81 62 41 44 43 41 40 39 38 36 35 32 28 25 22 19 15 12 6 18 55 40 55 40 29 29 29 40 0.3 .3 .3 .1 .1 .2 ,3 .3 .3 .3 .3 :l .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .2 .2 29 29 40 40 40 106 70 70 12 12 12 6 6 12 12 6 6 6 6 6 6 6 6 6 6 6 6 6 4 1 0.3 .3 .3 .2 .2 .2 .2 .2 .2 .2 .2 .1 .1 .1 2 3 4 5 6 8 9 10 11 12 3 3 3 3 3 3 1 3 3 1 3 3 3 3 3 3 3 3 3 1 1 1 1 2 2 2 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 7 7 5 5 5 5 5 5 13 14 15 16 17 . . 18 19 1 20 21. 1 22 i 23 24 i 25 : 26 i 27 28 29 30 31 1913-14. 1.... 2 3 4. 5 6 7 8 9 10 11 12 . . ! 13 14 15 16 1 17 18 19 20............ 21 1 22 23 24 25 26 27.... 28......=..o 29 30 31... SAN^ LUIS EEY EIVEE BASIJT. 195 Daily discharge, in second-feet, of San Luis Rey River at Bonsall, Calif., for 1912-1916 — • Continued. Day. Oct. Nov, Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1914-15. 1 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 20 10 2.5 3 4 5 6 7 8 9 10 10 10 10 10 10 10 11 11 11 11 11 11 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 43 65 38 38 38 38 38 3,150 3, 730 793 . 571 1,100 1,920 136 312 195 163 136 1,500 5,130 7,000 1,680 1,020 609 492 341 300 162 113 162 440 341 224 224 1,340 300 224 162 602 1,020 440 725 440 388 388 388 440 440 341 326 311 296 282 267 252 238 223 208 194 179 164 150 135 120 98 98 170 120 120 120 98 80 80 80 SO SO 62 62 62 62 80 80 98 98 98 98 80 80 80 120 600 232 198 142 142 142 142 200 400 610 900 620 515 2,050 1,010 715 680 450 415 500 415 380 320 220 232 232 310 232 232 198 198 198 198 198 198 170 170 170 142 142 142 142 142 142 142 120 120 120 120 98 80 80 80 80 62 62 45 45 45 45 45 45 45 45 28 28 28 28 28 28 28 14 14 14 14 14 12 6 4 2 .7 .7 .7 .7 .7 .7 .6 .6 .6 .6 .6 .6 .6 .5 .5 .5 .5 .5 .J 0.4 .4 .3 .3 .3 .3 3 .3 .2 .2 .2 .2 .2 .2 .1 .1 .1 .1 .1 .1 .05 .05 .05 .05 .05 .05 2 3 4 5 6 § 9 ..: 10. ' . ... 1] 12 1 13 14 ' 1.5 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 16... 17 i 18 ! 19 .....J 20 . . i 21 .. 22. 23 24 25 26 27 28 29 30-. i 31 1 Day. Nov. i Doc. Jan. Day. Nov. Dec. Jan. Day. Nov. Dec. Jan. 1915-16. 1 1 1 1 11 4 11 11 34 50 34 22 22 11 11 57 57 57 57 42 42 57 57 57 95 11 12 13 14 15 16 17 18 19 20 1915-1( 11 11 11 22 22 42 42 29 29 18 320 162 86 86 268 21. 1915-16. 4 18 18 18 18 18 18 29 29 29 143 95 2 3 23. 24. 25. 26. 27. 28. 29. 30. 31. 4 5 6 7 8 9 10 Note, — Daily discharge determined as follows: 1912: Apr. 16-18, by shifting-control method; Apr. 19 to June 17, from a fairly well defined rating curve. 1912-13: Dec. 11, 1912 to Ar»r. 9, 1913 and May 1 to June 14, 1913, from fairly well defined rating curves covering short periods; Apr. 10-30, by shifting-control method. 1913-14: Dec. 1, 1913 to June 25, 1914. from poorly defined rating curves covering short periods and by shifting-control method. 1914-15 Nov . 15, 1914, to Aug. 30, 1915, from fairly well defined rating curves covering short periods and by shifting-control method (new gage on right bank used Jan. 23 to Mar. 25). 1915-18: Oct. 1 to Nov. 6 practically dry; Nov. 7-15 and Dec. 16, 1915, to Jan. 15, 1916, read from two fairly well defined rating curves. No gage-height record after Jan. 16, 1916; discharge estimated from mean rainfall record computed for drainage area and compared with records of flow at stations on San Luis Rey River near Mesa Grande and Oeeanside. No estimates of discharge Nov. 20 and 21, 1913 and Feb. 22-28, 1914; Otherwise stream dry on days when no discharge is given. 196 SURFACE WATER OF PACIFIC SLOPE^ SOUTHERN CALIFORNIA. Monthly discharge of San Luis Rey River at Bonsall, Calif., for 1912-1916. 1912. April 16-30.. May June July August September... 1912-13. December... January February March ... April May June ■The year .... 1913-14. December . . . January Feb. 1 to 21 and 28 March April May. June. Discharge in second- feet. Maxi- mum. 170 1.8 .0 .0 .0 77 195 157 14 .3 .3 7 1,530 2,820 210 81 106 Mini- mum. 3 6 14 33 34 1 108 33.7 .60 .0 .0 .0 1.9 19.8 41.1 36.1 10.2 .28 .09 4.0 102 246 87.5 33.1 18.9 1.3 Rma-off (total in acre- feet). 3,210 2,070 35.7 .0 .0 .0 117 1,220 2,280 2,220 607 17 5 6,470 246 0, 270 10, 700 5.380 i;970 1,160 77 1914-15. November. . . December . . . January February March April May June July August 1 20 3,730 7,000 1,020 600 2,050 142 28 The year . 1915-16. November December January The period., Discharge in second- feet. 11 143 1.5 62 142 0.53 6.28 265. 133 420 1.7 28.4 4,180 Run-off (total in acre- feet). 32 385 16,300 52, 100 18,900 7,910 25, 800 4,480 300 13 101 1,750 257,000 Note.— No flow October and November, 1912; July to November, 1913; July to October, 1914; and September and October, 1915. SAN LUIS EEY RIVER NEAR BOH^SALL, CALIF. Location. — In SW. \ sec. 31, T. 10 S., R. 3 W., near junction of Escondido liighway with Oceanside-Bonsall road, 2 miles southwest of Bonsall, and 7 miles northeast of Oceanside, San Diego County. Drainage area.— Not measured. Elevation. — About 200 feet above sea level. Records available. — July 26, 1916, to September 30, 1918. (Gage heights and discharge measurements only.) Oage. — Staff in three sections on left bank 200 feet northwest of junction of high- ways. Zero of gage 122.82 feet above sea level. Previous to August 9, 1916, datum was 0.9 foot lower. January 2, 1918, a new staff was installed on left bank, 200 feet downstream, at an independent datum. Discharge measurements. — Made by wading near gage at low and medium stages; high-water measurements made from highway bridge at Bonsall. Channel and control. — Sand; very shifting. Diversions. — See San Luis Rey River at Bonsall, page 193. Regulation. — None. Accuracy. — Stage-discharge relation not permanent. Daily discharge not com- puted as sufficient discharge measurements have not been made to define the numerous changes in channel. Gage read to hundredths once daily. SA]^ LUIS EEY EIVEE BASIIT. 197 Discharge measuremerds of San Luis Rey River near Bonsall, Calif., for 1916-1918. Date. Made by- Gape height. Dis- charge. Made hy— Ga.-e height. Dis- charge. 1916. July 25 26 27 28 29 30 31 Aug. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 24 24 27 28 29 30 31 Sept. 1 2 Silent and Lee ...do ...do ...do ...do ...do ...do ...do. ...do ...do ...do ...do ...do ...do ...do ...do ...do ...do ...do ...do ...do ...do ...do ...do ...do ...do R. A. Silent.. ..do ..do Silent and Lee D. L. Lee.... do do do do Silent and Lee D. L. Lee... ...do ...do ...do ...do ...do ...do Feet. "2.m 2.00 1.99 1.97 1.99 2.00 1.94 1.94 1.95 1.97 1.07 1.00 1.12 "i.'vi 1.11 1.10 1.12 1.11 1.14 1.14 1.12 1.15 1.28 1.15 1.18 1.13 1.08 1.07 1.05 1.04 1.04 1.03 1.02 1.02 1.05 1.06 Scc.-ft. 5.8 13 15 14 8.8 11 12 7.2 7.5 8.3 5.8 6.6 2.4 1.5 6.8 8.1 7.9 8.4 7.2 6.2 9.1 8.3 9.7 10 8.2 10 22 16 16 21 13 11 9.8 8.8 7.9 6.3 4.3 1916. Sept. 7 8 9 10 11 12 13 14 15 Oct. 11 Nov. 15 24 Dec. 20 1917. Jan. 17 21 Feb. 11 13 23 26 Mar. 8 16 19 27 29 Apr. 11 21 May 21 25 June 9 30 Nov. 16 25 Dec. 21 1918. Jan. 2 Feb. 20 Mar. 5 Apr. 23 May 5 June 22 D. L. Lee. ....do ....do do ....do ..-.do ....do -...do .-..do W. J. Isbell. do ....do F. C. Ebert.. F.C.Ebert D. A. McClung.. .do. F.C.Ebert .-.-do D, A. McClung.. F.C.Ebert .do. D. A. McClung.. F. C. Ebert... '.- .do. D. A. McClung McGlashanand Ebert. F.C.Ebert .... .--.do D. A. McClung ....do ....do ....do F. C. Ebert D. A. McClung.. ....do F. C. Ebert D. A. McClung.. F.C.Ebert D. A. McClung.. Feet. 1.06 1.05 1.06 1.11 1.13 1.06 1.10 1.09 1.10 1.13 1.28 1.24 1.20 1.25 1.43 1.16 1.20 1.85 1.28 1.19 1.41 1.30 1.28 1.23 1.30 1.05 .99 1.39 1.22 .99 1.12 1.20 1.23 Sec.-fi. 6.5 6.0 42 31 138 297 48 48 1,610 540 134 133 88 58 58 74 83 65 129 31 1.7 12 14 16 15 40 27 15 13 2.0 Note.— Datum of gage raised 0.9 foot, August 9, 1916. Daily gage height, in feet, of San Luis Rey River, near Bonsall, Calif ., for 1916-1918. Day. July. Aug. Sept. Day. July. Aug. Sept. Day. July. Aug. Sept. 1916. 1 1.94 L04 1.03 L02 L02 LOS L06 1.06 1.05 1.06 1.11 1916. 11 L13 1.06 LIO 1.09 LIO 1.13 1.10 1.14 1.12 1.14 1916. 21 1.14 1.12 1.15 1.28 L15 1.18 1.13 1.08 1.07 L05 1.04 1 12 2 12 1.09 1.12 22 1 12 3 L94 1.95 L97 L98 L99 L98 L07 1.00 13 23 1 10 4 14 24 1 14 5 15 L12 1.11 1.10 1.12 1.11 1.14 25 .. 1 14 6 16 26 2.00 2.00 L99 L97 1.99 2.00 1 12 7 17 27 1.10 8 18 2S 29 1 13 9 19 1.11 10 20 30 1.13 31 Note.— Datrun of gage raised 0.9 foot August 9, 1916. 198 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORIsriA. Daily gage height, in feet, of San Luis Rey River near Bonsall, Calif, for 1916-1918 — ■ Continued. Apr. Maj\ 1.30 1.21 1.14 1.30 1.25 1.18 1.12 1.16 1.13 1.20 1.18 1.24 1.23 1.21 1.20 1.23 1.20 1.20 1.19 1.16 1.21 1.19 1.14 1.17 1.20 1.21 1.20 1.00 1.00 1.00 .98 1.00 1.01 1.20 1.21 1.20 1.23 1.34 1.28 1.25 1.25 1.22 1.26 1.27 1.23 1.26 1.22 1.16 1.20 1.23 1.21 1.23 1.29 1.16 1.23 1.19 1.18 1.11 1.01 1.02 1.07 1.00 1.01 1.00 1.01 1.00 1.20 1.13 1.12 1.07 1.10 1.09 1.12 1.11 1.14 1.10 1,10 1.16 1.13 1.20 1.20 1.18 1.20 1 21 1.22 1.20 1.12 1.17 1.12 1.19 1.15 1.12 1.15 1.19 1.11 1.00 1.24 1.22 1.16 1.22 1.18 1.19 1.15 1.10 1.20 1.15 1.16 1.20 1.23 1.19 1.58 1.00 1.07 1.04 1.10 1,12 1.05 1.20 1.20 1,21 1.20 1.18 1.19 1.20 1.20 1.16 1.17 1.18 1.19 1.23 1.26 1.28 1.28 1.27 1.25 1.25 1.23 1.22 1.24 1.22 1.22 1,21 1.25 1.26 1.22 1.23 1.22 1.23 1,07 1,00 1.25 1.23 1.13 1.00 1.18 1.00 1.00 1.11 1.00 1.01 1.03 1.23 1,07 1.43 1.30 1,21 1.53 1.27 1,50 1,33 1,40 1.22 1,20 1.24 1.17 1.15 1.25 1,20 1,27 1.23 1.23 .96 1.19 1.11 1.04 1,25 1.16 1,23 1,18 1.19 1.17 1.20 1.20 1.18 1.28 1.20 1.15 1.20 1.43 1.60 1.50 1.50 1.55 2.02 1.35 1.30 1.39 1,24 1.11 1.10 1.40 1.35 1.25 1.19 1.21 1.23 1.22 1.24 1.43 1.42 1.39 1.38 1.30 1.40 1.29 1.30 1.33 1.44 1.40 1.36 1.28 1.39 1.33 1.35 1.30 1.39 1.40 1.23 1.31 1.20 .64 .58 .56 .64 .60 .70 .92 1.52 1.00 2.00 2.77 1.75 1.23 1.10 .74 1,32 1.25 1.23 1.22 1.24 1.21 1.23 1.20 1.15 1.37 1.40 1.39 1.23 1.28 1.30 1,25 1.20 1.16 1.18 1.10 1.20 .86 1.05 1.10 1.20 1.02 1.27 1.03 1.10 1.17 1,11 1,10 1.04 1.02 1.06 1.10 1.11 1.31 1.31 1.27 1.30 1.25 1.20 1.09 1.10 1.15 1.20 1.27 1.10 1.00 1.06 .98 1.25 1.38 1.45 1.40 1.33 1.39 1.41 1.39 1.34 1,30 1.30 1.25 1,28 1.30 1.28 1.27 1.20 1.22 1.25 1.26 1.21 1.22 1.15 1.12 1.10 1.15 1.10 1.05 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.01 1.00 .54 .56 .54 .54 .52 ,50 .46 .40 NOTE.—Stream dry July 29 to Sept. 30 and Oct. 1-14, 1917; and July 28 to Sept. 30, 1918. SAN LUIS KEY RIVER BASIN. 199 SAN LUIS BEY RIVER NEAR OOEANSIDE, CALIF. Location.— In SW. I SW. I sec. 13, T. 11 S., R. 5 W., opposite Oceanside pumping plant, just above ford, about 1^ miles above mouth of river, and 2 miles north- east of Oceanside, San Diego County. Drainage area. — 563 square miles (measured on topographic maps). Elevation. — About sea level. Records available. — April 17, 1912, to September 30, 1914 (discharge measurementa only for 1915). Gage. — Staff in three sections on right bank just above ford. Discharge measurements. — Made from, concrete highway bridge three-fourths of a mile below gage or by wading near gage. Channel and control. — Sand; somewhat shifting. Extremes of discharge. — 1912-1915: Maximun stage recorded, 4.9 feet February 11, 1915 (discharge about 7,000 second-feet); no flow for several months each year. Diversions. — See San Luis Rev River at Bonsall, page 193. In addition, several small canals divert water for irrigation in Mission Valley, above the station. Water is also pumped from wells at various points in the valley. Record at this station shows quantity of water wasted into Pacific Ocean. Regulation. — None . Accuracy. — Stage-dischai'ge relation not permanent. Rating curves fairly well defined except for flood stages. Gage read, usually to half-tenths, twice daily. Daily discharge ascertained by applying mean daily gage height to rating tables, by shifting-control method, or for periods when change in stage v/as slight by interpolation between discharge measurements. Records fair. Discharge measurements of San Luis Rey River near Oceanside, Calif ., for 1912-1915. Date. Made by — heijht. Dis- charge. Date. Made by— Ga?e height. Dis- charge. 1912. Apr. 17 May 3 F.C.Ebert Feet. 2.55 2.24 2.28 2.06 2.05 1.94 2.09 2.32 2.23 2.01 1.97 2.14 1.80 3.62 3.06 2.27 1.42 1.62 1.16 Sec.-ft. 215 33 46 9.1 7.2 2.2 13 104 67 20 10 31 1.4 1,740 734 155 38 79 17 1914. Mar. 27 Apr. 18 25 May 9 14 Dec. 14 1915. Jan. 23 25 30 Feb. 5 14 27 Mar. 11 26 Apr. 7 18 27 May 6 16 July 6 F. C, Ebert Feet L30 L04 1.46 L13 .88 .79 .82 See.-fL 29 do E.W. Case do.. do do do do F. C. Ebert 4.6 46 21 F.C.Ebert 13 1913. Jan. 17 F. C. Ebert 1.6 .0 18 Feb. 22 do do do W. S. Post 2 23 25 do C. E. Hiekok . 1.8 1 470 Mar. 12 "R'. C. Ebert K. B. Slepuy 2.2 2.57 2.17 2.30 2.06 2.08 1.9 2.23 3.3 2.43 ^325 20 do W. S. Post . . . F.C.Ebert 722 24 .---do do do do D.L.Lee 296 Apr. 8 F.C.Ebert 345 1914. Jan. 27 C.E.Hickok 120 88 56 28 do F.C.Ebert W.J.lsbell 150 30 V/. D. McFadden F.C.Ebert 1 250 Feb. 4 do do do '222 Mar. 9 23 do .0 NOTEr original -Measurements Jan. 27, 1914, to Jan. 25, 1915, refeiTed to temporary gage on left bank opposite age and at same datum. 200 SURFACE V/ATER OF PACIFIC SLOPE, SOUTPIEPtN CALIFORlsriA. Daily discharge, in second-feet, of San Luis Rey River near Oceanside, Calif , for 1912-1914. Day. Apr. May. Day. Apr. May. Day. Apr. May. 1912. 1 47 39 31 24 18 18 17 42 158 128 1912. 11 58 42 31 31 24 20 15 12 17 13 21 1912. 208 128 107 91 81 02 72 58 58 53 12 2 12... 22 8 4 2 13...::::.:.:.::: 23.. 6 4 14 24 5.2 5 15.. 25 2 6 16 26 2 7 17 189 208 218 208 27 2 8 18 28 2 19 29 2 10 20 30 1 31 .0 Day. Jan. Feb. Mar. Apr. Day. Jan. Feb. Mar. Apr. May. 1912-13. 1 74 40 27 27 14 14 10 10 6 6 6 27 27 27 27 27 14 14 6 14 20 27 27 40 40 27 14 14 .6 6 6 10 6 10 10 4 1 .8 .8 .0 .5 1913-14. 1 . 130 45 43 41 41 41 35 19 29 29 29 29 29 29 15 29 24 29 408 1,310 2,650 3,260 1,410 295 180 165 137 124 102 151 124 102 102 82 72 72 72 55 72 55 55 41 41 41 29 29 29 19 19 19 19 11 11 29 29 41 72 102 180 72 55 41 29 41 41 48 41 29 35 35 29 29 29 19 15 11 8 4 2 2 8 41 55 55 41 35 29 29 29 41 2 2 41 3 3 41 4 4 35 5 5.. 29 6 6 29 7 7 19 8 8. 19 9 9 11 10 10 5 11 11 5 12 12... ,. 2 13 13 5 14 14 5 15 15 2 16 16 . 1 17 7 2 •■» 17..... 18 18.... 19 19 20 20..... 21 21 22 18 198 95 74 290 125 125 22 23 23 24 24 25 25 26 26 27 27 1,460 610 230 150 140 28 28 29 29 30 30 31 31 Note.— Daily discharge determined as follows, 1912: Apr. 17 to May 28, from a rating curve well defined above 8 second-feet; May 29-30, interpolated. 1913: Feb. 23 to Apr. 12, from fairly well defined rating curve. 1914: Jan. 27 to 30 and Feb. 4 to May 16, from fairly well defined ratiog curve; Jan. 31 to Feb. 3, by sblfting-control method. Stream dry on all days when discharge is omitted. Monthly discharge of San Luis Rey River near Oceanside, Calif., for 1912-1914- 1912. Aprill7-30.. May 1912-13. January February March April The year. Discharge in second-feet. Maxi- Mini- mum, mum. 218 156 7 290 74 10 .3 33.0 21.0 1.85 4.50 3,250 Run-off (total in acre- feet.) 3,440 1,640 18 1,830 1,290 110 1913-14. January February March April May The year. Discharge in second-feet. Maxi- Mini- mum, mmn. 1,460 3,260 180 72 41 3,260 83.5 379 60.5 31.2 9.4 44.6 Rim-off (total in acre- feet.) 5,130 21,000 3,720 Note,— No flow in months for which record is not given. SAN LUIS KEY EIVEE BASIN. 201 SAN LTJIS BEY RIVER AT OCEANSIDE, CALIF. Location.— In SE. i NE. I sec. 22, T. 11 S., R. 5 W., at highway brid31.2 a 31. 2 a 40. 8 a 37. 2 a35. a 40. 8 a 38.0 6 35.0 a 31. 2 O35.0 a 35.0 a 35. o33. 1 C31.2 a 33.1 a 33. 1 a 37.0 a 38. 9 a 37. O37.0 a 35.0 31.2 6 29.2 a 24. 4 al5. C15.6 a 15. 6 k15. 6 15.6 a 15. 6 a 15. 6 a 5.5 a 5.5 35.0 a 29. 2 a 31. 2 31.2 a 33.1 a 29. 2 o33. 1 a 37.0 a 35. 31.2 33.2 a 27. 2 a 27. 2 a 25. 4 a 25. 4 a 19. 5 a 15. 12.0 12.0 12.0 12.0 12.0 12.0 12.0 12.0 Apr. 1897-98. 1 2 4.25 3 4.25 4 4.25 4.25 6. 3 6 7. 3.6 8 3.6 9 3.1 10 3.1 11 3.1 12 3.1 13 3.1 14 3.1 15 6.2 5.5 10.2 10.2 6.95 9.4 9.4 a 20. 4 a 21. 4 US. 5 as. 5 as. 5 a7.5 a7.5 a6.i a7.5 ^37.0 f25.3 S21.4 ^20.0 a6.6 a4.2 a2.7 a2.o xlO.2 10.2 10.2 10. o9.4 9.8 a 10. 2 9.8 a 29. 2 a 35.0 a 23. 4 a 19. 2 fl21.4 a 25. 8 a 13. 8 a 13.1 a 12. 2 oil. 8 oll.l a 10. 4 a 10.2 a 10. 2 a 10. 2 O10.2 O10.2 a 10. 2 8.1 7.7 7.7 1897-98. 16 8.6 17 6.95 18 12.0 19 20 12.0 21 12 22 12.0 23 12.0 24 12.0 25 10.2 26 10.2 27 10.2 28 8.6 29 8.6 30 8.6 31 6.95 a 20. 8 a 28. 3 "29.2 a21.4 a 20. 4 16.2 14.7 a 30. 2 a 34.0 a 27. 3 a 21. 4 15.7 a 21. 4 24.4 a21.4 a 17. 5 a 12.0 a 15. 2 a 25. 3 a 18. 5 a 15. 2 a 14.0 a 12. 4 all. 6 a 11.1 a 11.1 a 11.1 a 11.1 a 10. 4 a 20.0 a 23. 9 a 23. 8 a 29. 2 a 31. 2 a 23. 4 a 19.0 a 21.0 a 17. 3 a 15. 6 a 30. 2 a 26. 3 a 24.1 a 20. 7 a 17.0 a 15. 2 a Mean of a. m. and p. m. readings. f> No flow in p. m. SAN LUIS KEY KIVER BASIN. 217 Daily discharge, in second-feet, ofEscondido Mutual Water Co.'s canal near Nellie, Calif., for 1896-1918— Contmued. Day. Dec. Jan. Feb. Mar. Apr. Day. Dec. Jan. Feb. Mar. Apr, 1898-99. 1 3.6 21.4 35.0 15.6 17.5 12.0 12.0 12.0 11.1 10.6 10.2 9.4 9.4 9.4 9.4 6.6 6.2 5.85 5.5 4.9 4.25 4.25 4.25 4.25 4.25 4.25 4.25 4.25 4.25 4.25 12.9 11.1 10.6 10.2 9.8 9.4 8.6 7.7 7.3 6.95 6.6 6.2 5.5 5.2 4.9 189S-99. 16 G.95 6.95 6.95 6.6 6.2 5.85 5.5 3.6 4.25 4.25 4.25 3.95 3.6 3.6 3.6 3.6 8.6 8.1 6.95 6.6 6.2 5.85 5.5 5.5 19.4 12.0 8.6 7.7 6.95 4.25 a33.1 a29.2 al7.6 026. 4 «33. 1 a23. 4 ■'16. 6 13.8 12.9 22.5 13.8 12.9 4.55 2 17 4.25 3 18 4 19 5 20 6 21 7 22 . . . 8 23 9 24 10 25 11 26 5.5' 12 27 4.9 13 28 14 29 . 15 30 16.6 13.8 31 Day. Jan. Feb. Mar. Apr. May. Day. Jan. Feb. Mar. Apr. May. 1899-1900. 1 5.2 4.9 a8. 75 6.95 «19. 5 al3.1 all. 6 10.2 9.8 9.4 8.1 .7.7 7.7 7.7 7.7 6.95 6.95 6.95 6.95 7.3 7.3 6.95 6.95 6.95 6.95 6.95 6.95 6.95 6.95 6.95 3.95 4.25 4.25 6.42 12.0 7.7 6.95 6.2 5.5 5.5 5.2 4.55 4.55 4.55 al2.1 4.25 4.25 5.5 5.5 5.5 5.2 5.^ 6.95 6.95 6.2 5.5 4.9 4.55 4.9 4.25 7.3 6.95 6.2 10.2 al9.6 029.2 15.6 12.0 8.6 6.95 12.9 15.6 10.2 8.6 6.95 1899-1900. 16 7.7 6.95 6.95 6.95 6.95 6.95 6.95 6.95 6.95 6.95 7.3 7.3 7.3 6.95 6.95 6.95 6.6 6.6 6.2 6.95 6.6 6.6 6.2 5.5 4.55 4.55 4.25 3.95 3.60 4.55 4.55 4.25 4.55 4.55 4.55 4.9 alO.3 10.2 5.5 5.2 4.9 4.55 4.55 4.25 4.25 3.95 3.6 3.35 3.1 3.1 12.0 25.4 13.8 10.2 7.3 6.95 7.7 al7.7 013.4 9.4 4.9 2 17 3 18 4 19 5 20 6 21 7 22 8 23 9 24 10 25 11 26 12 27 13 28 14 29 15 30 31 Day. Nov. Dec. Jan. Feb. Mar. Apr. Day. Nov. Dec. Jan. Feb. Mar. Apr. 1900-1901. 1 3.6 3.6 3.35 3.35 3.35 3.35 3.35 3.1 3.1 3.1 a21.4 027. 3 a27.3 31.2 33.1 19.4 18.4 17.5 21.4 19.4 18.4 20.5 17.5 16.6 15.6 14.7 1900-1901. 16 . . 1.85 10.2 15.6 15.6 12.0 10.2 21.4 21.4 10.2 6.95 5.5 5.2 3.6 3.6 4.25 5.5 5.5 5.5 5.5 8.6 a20.4 al7.5 14.7 12.9 23.4 25.4 17.5 17.5 15.6 12.0 10 6 33.1 19.4 19.4 18.4 17.5 17.5 19.4 19.4 18.4 17.5 16.6 16.1 15.6 14.7 13.8 20.5 20.5 2 17 3 18... 4 19 5 3.1 12.0 25.4 20 6 21 7 22 8 23.. 9 15.6 12.0 10.2 8.6 6.95 6.2 5.5 11.1 17.5 23.4 25.4 23.4 21.4 19.4 24 10 25 11 26 12 12.0 23.4 31.2 33.1 27... 13 28 14 29 15 30 31 a Mean of a. m. and p. m. readings. 218 SURFACE WATER OF PACIFIC SLOPE, SOUTHERIn CALIFORK-JA. Daily discharge, in second-feet, of Escondido Mutual Water Co.'s canal near Nellie, Calif., for 1896-1918~Goiitmued. Day. 7.. 8.. 9., 10.. 11., 12. 16. 17. 23. 24. 30. 31. 4.5 "9." 6' 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.6 a4.9 a6. 6 ab. 85 all. 6 321. 4 alO. 7 al2.9 alO.6 0I5.6 a27,2 a5, 5 127.2 a27.2 025. 3 a26.3 o27. 2 a27.2 a27.2 a27. 2 026. 3 a21.4 a24. 4 023.4 a23.4 023. 9 a23.9 a23. 9 a23.9 a22.4 a24.4 023.9 a21.9 0I9.5 ol7. al6.1 al3.6 al3.8 «14.7 al8.5 027.2 027.2 a27.2 027. 2 026.8 026.3 0.24. 8 a23. 8 022. 2 020.5 020.0 a25.3 021. 4 al8.0 0I6.I 0I6.I al5.2 0I4.2 ffl21.4 027.2 o27. 2 023.9 020.0 018. 019. o27. 2 Apr. 615.6 027.2 027.2 027.2 027.2 027.2 027.2 027.2 a27.2 027.2 a27.2 May. 027.2 olO.a 0IO.2 alO.2 0IO.2 0I2.O al2.0 al2.0 12.0 0I5.6 o27. 2 027.2 027.2 027.2 o27. 2 025.3 Day. Mar. Apr. May. 1904-5. 1 027.8 G25.8 027.2 028.2 027.2 026.8 027.2 026. 8 025.8 023.0 027.2 027.2 027. 2 027.2 027.2 027.2 027.2 027. 2 027.2 027.2 027.2 026.3 027.2 027.2 025. 8 027.2 027.2 2 3 4 5 6 7 8 9 10 1904-5. 11 . . . . 022.4 026.3 024.8 026.3 024.4 12 13 14 . . 15 16 17 18 19 20 Apr. 027.2 027.2 027.2 027.2 027.2 027.2 C27.2 a27.2 027. 8 027.2 May. 027.2 027.2 027.2 027.2 027.2 15.6 a22.5 022.5 022.5 026. 3 027.2 027. S 027.2 Apr. 027.2 027.2 027.2 027.2 027.2 a27.2 027.2 ' 1896-1918— Gontimied Daily discharge, in second-feet, ofEscondido Mutual Water Co.^s canal near Nellie, Calif. ^ far "^"^ """'' ^ "' Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1913-14. 1 7.5 6.4 5.9 5.4 5.0 4.6 4.1 3.7 3.7 3.7 3.7 3.7 3.7 3.7 7.5 15.1 24.2 18.0 39.7 24.2 18.0 12.3 13.7 13.7 25.8 30.4 36.6 36.6 40.4 36.6 33.5 30.4 28.2 25.8 24.2 22.6 21,8 21.1 18.0 17.2 las 15.8 19.5 21.1 " ■24.'2' 30.4 38.1 42.7 42.7 42.7 30.4 30.4 38.1 38.1 38.1 38.1 38.1 35.1 33.5 33.5 32.0 30.4 30.4 30.4 33.5 33.5 36.6 36.6 36.6 36.6 36.6 36.6 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 13.7 11.3 11.3 11.3 11.3 11.3 7.5 11.3 11.3 11.3 11.3 11.3 11.3 11.3 11.3 16.5 16.5 16.5 16.5 16.5 16.5 36.6 36.6 36.6 a 15. 2 18.0 12.3 12.3 12.3 12.3 12.3 12.3 12.3 12.3 12.3 12.3 a 15. 9 18.0 16.5 15.8 15.1 9.8 "i2.'3' 7.5 12.3 12.3 12.3 11.0 12.3 12.3 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 16.5 12.3 16.5 16.5 13.7 13.7 13.7 16.5 16.5 12.3 16.5 16.5 16.5 15.1 15.1 12.3 12.3 16.5 16.5 12.3 24.2 24.2 29.7 29.7 29.0 27.4 24.2 19.5 18.0 17.6 16.5 15.8 15.8 18.7 18.0 16.5 15.8 14.4 13.7 12.3 11.7 11.0 11.0 11.0 11.0 11.0 10.4 9.8 9.2 8.6 8.6 9.8 12.3 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 8.6 9.8 9.8 7.5 0.9 7.5 all. 1 15.8 10.4 8.6 7.5 6.4 5.9 2 3 4 5 2.8 2.8 2.8 2.0 2.3 2.3 2.3 2.3 2.3 2.6 2.6 2.6 2.6 2.6 2.6 3.7 3.7 5.4 7.5 6.9 7.5 7.5 6.4 6.4 5.9 12.3 9.8 6 7 8 9 10 11 12 13 . - 14 15 16 17 18 19 20 21 22 23 24 25 . 26 27 28 29 30 31 33.5 6.7 6.4 6.2 8.0 9.2 7.7 7.7 7.7 10.1 9.8 9.8 9.8 9.8 9.8 9.8 9.8 9.8 9.8 9.8 9.8 9.8 9.8 .24.2 14.7 32.7 33.5 21.8 , 27.4 33.5 33.5 33.5 24.2 24.2 24.2 24.2 29.0 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 33.5 1914-15. 1 6.4 6.4 6.4 6.4 6.4 6.4 6.4 6.4 9.8 9.8 9.8 9.8 9.8 9.8 9.8 9.8 9.8 9.8 9.8 19.5 19.5 22.6 22.6 22.6 22.6 22.6 21.8 21.8 22.6 22.6 22.6 22.6 15.1 18.0 19.5 18.0 18.0 18.0 13.7 13.7 13.7 13.0 13.0 12.3 12.3 11.7 11.0 11.0 10.4 10.4 10.1 9.8 9.5 9.2 8.6 8.0 8.6 8.6 8.0 2 5.0 3.5 3.4 4.1 3.5 3.7 3.5 3.5 3.5 5.6 22.6 10.4 6.7 5.6 5.4 10.7 25.8 19.5 16.1 16.5 13.7 12.0 10. 4 8.6 8.3 9.2 9.2 7.7 7.7 7.5 3 ■ 4 5 6 7 8 9 10 .... 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Note.— Gage not given. was rea d once oMean daily e^ of mori ccept as ling anc indica i af tern ted. C oon disc mal wa harges. s dry Q days for wlii 3h disci large is SAN LUIS BEY BIVER BASIIS", 223 Daily discharge, in second-feet, of Escondido Mutual Water Co. ''s canal near Nellie, Calif., for IS 96-1 9 18— Continued, Day. Apr. May. July, Sept. Apr. May. -July. Aug. Sept. 7. 8. 9. 10. 11. 12. a 6. 7 6.5 a 6. 4 6.3 a 6. 2 6.1 O6.0 5.9 a 5. 9 a 4. 8 4.8 1916. 16 18 17 IS 18 18 19. . 18 20 22 21. 22 22 24 23. .. 24 24 27 25 27 26 27 27. . 27 28 28 29. . 28 30 28 31 5.9 a 6.0 6.1 a 6. 3 6.5 a 6. 7 6.7 a 8. 4 10 a 7. 8 5.7 a 5. 5 5.3 a 5. 4 Day. 7... 8... 9. . . le:. 11.. 12.. 13.. 16.. 17.. •18... 19.. 20.. 21.. 22.. 23.. 24.. 25.. 26-. 27.. 30.. 31.. Oct. 24 26 26 4.8 4.8 4.8 4.8 4.8 4.8 €.3 6.3 6.3 6.3 6.3 6.3 6.3 Apr. 8.9 8.9 May. 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 6.7 6.3 6.3 July. 5.9 6.3 6.3 5.9 5.9 5.9 5.9 5.5 5.5 5.1 5.1 5.1 5.5 5.5 5.1 5.1 4.8 5.1 4.8 4.8 5.5 5.9 7.1 5.9 5. 5 Aug. 6.3 5.9 4.8 5.1 4.8 4.5 4.2 4.2 4.2 4.2 4.2 4.2 4.2 4.2 3.8 4.2 Sept. 3.5 3.5 3.5 3.5 3.5 3.2 3.2 3.0 3.0 3.0 3.0 3.0 3.0 3.2 3.2 2.7 4.8 16 6.3 4.8 4.8 5.5 4.5 4.2 4.2 3.8 a No record, discharge interpolated. Note.— No flow Sept. 6-30, Oct. 1, Nov. 26, Dec. 22-30, 1916; aad Jan. wn. No record Oct. 1 to Apr. 7 and Apr. 9-15. Canal probably dry. 3, 20-25, June 21-25, and Sept. 10, 224 SUEFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. ofEscondido Mutual Water for 1896-1918— Continued. J)aily discharge, in second-feet, ofEscondido Mutual Water Co.^s canal near Nellie, Calif. , Day. Oct. Nov. Dec. Jaxi. Feb. Mar. Apr. May. June. July. Aug. Sept. 1917-18. 1 16.5 16.8 15.0 16.4 17.1 16.5 16.5 2.6 14.8 16.2 16.4 16.8 16.0 16.7 16.7 16.2 16.0 14.9 15.1 16.5 .0 15.0 15.1 16.8 16.9 18.4 16.2 .0 16.4 15.1 16.4 16.0 16.2 15.0 .0 16.1 15.1 14.9 15.0 16.1 14.9 .0 16.4 16.6 16.0 16.6 16.5 16.1 .0 14.9 16.1 16.0 16.3 16.2 16.5 .0 16.1 14.9 16.2 16.0 16.2 8.4 9.4 9.4 9.9 9.4 9.4 8.9 8.4 8.4 8.4 8.9 8.9 9.9 9.9 9.4 9.4 8.9 8.4 8.4 8.9 9.4 9.4 9.9 9.9 9.9 9.9 9.4 9.4 8.9 8.9 8.9 8.9 8.9 8.9 10.4 9.9 9.4 8.9 8.9 10.4 10.9 10.4 10.4 14.4 17.6 14.4 14.4 13.0 11.9 10.9 10.4 9.9 10.9 9.9 9.9 11.9 17.6 20 20 16.4 15.2 13.0 11.9 11.9 11.9 10.9 10.9 11.9 13.0 13.0 10.9 8.9 9.9 10.4 10.9 10.9 10.9 9.9 9.9 15.2 23 28 23 15.2 .0 25 23 25 20 15.2 16.4 15.2 13.6 13.6 14.1 14.1 23 25 28 28 18.8 .0 .0 .0 .0 .0 12.0 12.0 12.0 12.0 12.0 12.0 20 22 22 22 23 23 23 23 23 23 23 23 23 23 23 22 23 23 23 23 23 23 23 23 22 21 20 17.5 16.0 '"i9."6' 19.0 19.0 19.0 16.0 16.0 15.0 16.0 16.0 16.0 16.0 19.0 20 18.0 19.0 19.0 16.0 16.0 14.0 15.0 15.0 15.0 15.0 14.0 14.0 14.0 13.5 13.5 13.5 13.5 13.5 20 20 20 18.0 17.0 14.0 14.0 13.0 12.5 12.0 12.0 11.0 11.0 10.5 10.5 10.0 8.0 8.0 8.0 8.0 12.5 9.0 8.0 20 11.5 9.0 8.0 8.0 8.0 7.0 6.2 6.2 6.2 6.2 6.2 5.5 6.5 5.5 5.5 5.0 5.0 5.0 6.2 5.6 5.5 5.5 6.0 4.6 4.6 4.0 4.0 4.0 4.6 4.0 4.0 3.6 3.6 3.6 4.0 4.0 4.8 4.5 4.0 3.6 3.6 5.0 4.2 3.9 3.9 4.2 3.9 3.9 4.2 3.9 3.9 3.9 4.2 3.9 4.2 4.6 4.6 4.6 4.2 4.2 3.9 3.9 3.9 3.9 3.9 3.5 3.1 3.1 3.9 3.5 3.1 3.5 4.2 3 9 2 3 3 9 4 3 9 5 3.9 3 5 6 7 3.1 8 3 1 9 10... 11 12 13 14..,. 15 16 17 18 19 20 21 22 ... 23 ....... 24 25 26 27 28 29 30 31 Note. — No record Apr. 21-! Water turned out of canal for season on Sept. 9. Monthly discharge of Escondido Mutual Water Co's. canal near Nellie, Calif ., for 1896- 1918. Month. Discharge in second- feet. Run-ofi (total in acre- feet). Month. Discharge in second- Run-off (total in Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1896-97. October 12.00 19.45 15.60 35.05 37.00 40.85 37.00 8.60 0.85 3.10 4.25 6.95 19.45 5.50 12.00 2.05 159 274 438 997 1,341 1,424 1,174 210 1899-1900, January 21.45 7.30 15.60 25.36 31.20 4.90 3.60 3.95 3.10 4.90 !!!!!!!! 498 November February March 351 356 January April 438 February May 360 The year 1900-1901. April..*....!.!!!.' 31.20 .0 21.45 3.60 25.35 33.10 25.35 20.50 .0 2,003 .0 1.85 3.10 3.10 12.00 11.10 14.70 293 66 652 The year 40.85 .0 6,017 November December January 1897-98. 12.00 48.80 37.00 37.00 13.80 3.10 5.50 10.20 9.40 7.70 392 1,028 917 1,193 351 December January February March 542 846 February April 396 The year 1902-3. November December January April 33.10 .0 2,795 The year 48.80 .0. 3,881 6.50 9.00 25.35 27.25 27.25 27.25 27.25 2.50 2.00 3.60 5.50 13.35 5.50 10.20 26 35 352 1898-99. 6.95 35.05 39.00 12.90 3.95 3.60 4.25 4.25 158 608 717 282 January February March 1,270 February 1,310 March April 1,014 April May 230 The year.... The year.... 39.00 .0 1,765 27.25 .0 4,237 SAK LUIS KEY RIVER BASIN. 225 Daily discharge, in second feet, o/Escondido Mutual Water Co. ^ s canal near Nellie. Calif., for 1896-1918— Gontinued. Discharge in second- feet. Maxi- mum. Mini- mum. Run-off (total in acre- feet). Discharge in second- feet. Maxi- mum. Mini- j mum. Run-off (totalia acre- feet). 1904-5. March April May The year. 1905-6. January February March . : The year... 1906-7. October November December January May June July The year. 1907-8. November. . . . December January February March April May June The year.. 1908-9. November December January February March April May June July The year 1909-10. January , February March , April May — June , July August , The year . . 1910-11. December January February March April May The year 1911-12. January , February March April , 28.30 28.30 27.25 25.35 27.25 27.25 27.25 7.70 15.60 25.35 24. 30 10.20 10.20 5.50 25.35 9.00 13.35 14.70 12.00 12.00 12.00 12.00 7.70 14.70 6.95 10.20 19.45 23.40 23.40 19.45 10.20 10.20 2.55 23.40 13.00 17.30 17.30 7.50 7.50 3.00 1.20 1.20 17.30 3.7 19.5 20.3 20.3 20.3 16.5 20.3 12.30 7.50 18.00 15.60 27.25 15.60 10.20 10.20 3.10 8.60 12.00 12.00 4.25 6.20 5.50 8.10 9.80 5.50 5.50 12.00 7.70 7.70 6.20 6.20 5.50 8.60 9.40 10.20 10.20 3.10 2.05 .0 6.40 11.70 6.40 6.40 4.60 1.20 2.3 3.0 17.3 17.3 17.3 5.4 4.1 11.0 14.4 1,138 1,621 676 448 L,192 128 64 1,055 1.53 278 504 65 2,247 588 612 299 432 714 622 53 77 414 544 397 852 798 627 363 101 4,173 502 797 754 392 395 105 32 2,999 166 478 543 1,161 1,151 494 305 487 458 1911-12. May June The year 1912-13. December January February March April May — The year 1913-14. December January February March April May June The year 1914-15. December January February March April May , June July The year 1915-10. April May June July August September The year 1916-17. November December January February March April May June July August September The year 1917-18. October November December January February March April 1-20, 27-30.. May. . , June.. July... Augusi 25.80 6.40 25.80 4.90 12.80 19.30 23.10 21.50 2.50 23.10 12.30 39.70 40.40 42.70 18.00 29.70 15.80 42.70 25. 80 33.50 33.50 33.50 16.50 12.30 22.60 22.60 33.50 10 5.5 15 22 24 26 18 15 22 19 7.1 6.3 16 18.4 16.6 23 20 20 6.2 5.0 4.2 6.4 6.4 2.10 3.50 6.10 19. .30 6,10 1.90 .0 2.30 3.70 15.80 24.20 9.80 8.60 5.90 3.50 6.70 24.20 11.30 12.30 6.40 6.40 8.00 .0 24 11 5.2 5.3 12.2 27.3 16.4 8.42 6.82 .837 6.03 11 4.8 3.5 3.5 10.7 16.3 21.0 9.34 9.57 11.7 8.73 5.45 4.25 4.00 .0 .0 8.4 8.9 .0 .0 16.0 13.5 6.2 3.5 3.1 .0 14.7 13.8 9.19 12.2 14.3 15.6 21.5 16.1 10.2 4.64 3.95 1,332 12 Note.— No record for years 1901-2 and 1903-4. Flume destroyed by fire in 1903-4. No flow in months for which record is not given. 142131°— 21^wsp 447- -15 226 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN" CALIFORNIA. RINCON I2ffDIAN USSERVATIOSf DITCH NEAR VALLEY CEUTEB, CALIF. Location. — In sec. 35, T, 10 S., R. 1 W., in Rincon Indian Reservation, a])oiit 2,000 feet below intake, and about 6 miles northeast of Valley Center, San Diego County. Records available. — 1912. Discharge. — Computed from gage heights giving head on 3-foot rectangular weir with end contractions. Coope'ration. — Record furnished by Indian farmer, Rincon Indian Reservation. The canal heads on the right bank of San Luis Rev River, and was in operation May 6 to June 30, 1912. The water is used for irrigation on the reservation. Daily discharge, in second-feet, of Rincon Indian Reservation ditch near Valleq Center, Calif. Jor 1912. Day. May. June. Day. May. .June. Day. May. June. 1 1.0 1.0 .8 .6 1.0 .7 .7 • .8 .7 .7 11 0.9 .9 .9 .9 .8 .9 .9 .9 .8 .8 0.8 .9 .8 .8 .8 .9 .8 .8 .7 21 0.9 1.0 .8 .8 1.0 1.0 1.0 1.0 .9 LO .0 0.6 2 12 22 .6 13 23 .8 4 14 ..,.„.. 24 .6 5 15 , . 25 . .6 6 16 26 ,. 7 17 .. 27 8 . 18 28 9 19 29 10 0.9 20 30 , ■•^1 Note. — Canal in operation May 6 to June 30, 1912, but no record was furnished lor May 6-9. Monthly discharge of Rincon Indian Reservation ditch near 'Valley Center, Calif ..for 1912. Month. Discharge in second-feet. ■Run-off (total in acre-feet). Maximum. Minimum. | Mean. May 10-31 1.0 0.0 0.S6 1.0 .4 .70 38.5 June ... 41.7 PALA INDIAN- RESERVATION CANAL AT PALA, CALIF. Location.— In NW. I SE. \ sec. 26, T. 9 S., R. 2 W., at sand l>ox three-fourths of a mile below intake, 300 feet above highway bridge, and half a mile southeast of Pala, San Diego County. Records available. — ^IVIay 22, 1912, to December 31, 1913 (incomplete). Gage. — ^Vertical staff'in sand box showing head on steel plate at outlet. Discharge measurements. — ^Made from foot plank across canal ])elow sand box. Accuracy. — Stage-discharge relation permanent. Rating curve well defined. Gage read to hundredths once daily. Daily discharge ascertained by applying daily gage height to rating ta]:>le. Records good. Intake of canal is on left bank of San Luis Rey River three-fourths of a mile above highway bridge at Pala. The water is used for irrigation and domestic supply on Pala Indian Reservation. SAN LUIS REY EIVER BASIN. 227 Discharge measurements of Pala Indian Reservation canal at Pala, Calif. ^ for 1912-1913. 1912. Feb. 13 May 22 June 15 July Aug. Made by- F.C. Ebert. do. H. L. Davis. E. W. Case.. F.C. Ebert. E. W. Case.. F.C. Ebert. ....do Gage Dis- height. charge. Feet. "b'.'zi' 5.3 4.2 3.1 2.7 5.7 Date. 1913. Jan. 19 May 9 June 13 July 25 Aug. 31 Oct. 6 Made by— F.C. Ebert.. do do R.W.Day.. F.C. Ebert. do." Cage Dis- heiglit. charge. Feet. 0.23 .22 Sec.-jt. l.G 1.6 5.7 2.2 3.3 4.0 Daily discharge, in second feet, of Pala Indian Reservation canal at Pala, Calif, for 1912-13. Day. May. June. July. ! Aug. i Sept. Day. May. June. July. Aug. Sept. 1912. 1 1 2.5 3.0 2.3 2.2 4.0 3.8 4.0 3.3 1912. If, j 2 i 17 1.5 6.7 8.7 7.5 2.7 3 18 4 .-.. 2.8 19 3.4 5.4 5 20 3.3 6 21 7 ... 3.3 22 2.7 7.1 0.7 6.4 6.1 5.4 5.2 5.1 4.1 7.4 ;::;::: 8 23 9 2.8 3.3 3.3 24 2.3 10 25 11 . . 26 \ 12 4.1 27 4.5 3.3 13 28 14 29 15.... 6.6 3.8 30 31 . Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sopt. 1912-13. 1 .6 .6 6.2 6.2 6.2 4.8 3.6 2.4 I 1.4 1.4 5.5 4.8 4.8 4.8 4.8 4.2 4.8 4.8 3.6 4.8 4.8 4.8 "'i.'e' 5.5 5.5 4.8 5.5 5.5 5.5 5.5 4.8 5.5 5.5 5.2 2.4 2.4 2.6 ""2." 4" 2.4 2.4 2.4 2.4 2.4 1.8 2.4 2.4 1.8 2.4 3.6 3.2 3.6 3.2 3.6 3.2 2.4 3.2 3.2 2.8 3.0 3.0 3.0 3.0 3.0 3.0 2.6 3.2 3.2 3.2 3.2 3.2 3.2 3.0 3.2 3.0 3.0 3.0 3.0 3.0 3.0 2.4 2.4 2.4 2.4 2.4 2.4 2.4 1.8 2.4 2.8 3.3 2 3.6 2 4 3 2. 4 4 2 4 5 2.4 6 4.8 2.4 7 2 4 8 . 2 4 9 10... 2 4 11.... 2 4 12 2 4 13 2 7 14 2.4 1 8 15 4.8 4.8 4.8 5.5 5.1 5.1 5.5 5.5 5.5 4.8 3.6 3.6 3.6 3.6 3.6 3.6 1 8 16 2.4 17.... 2 4 18 5.6 2 4 19 1.6 1.0 1.0 2! 4 20 6.2 6.2 6.2 6.2 6.2 6.2 6.2 "I'.'b 5.5 5.5 5.5 5.1 5.5 4.8 4.8 21.... 2 4 22 2 6 23 2.7 24 3 6 25 3 6 26 3.6 3 27.. 2 8 28 3.6 29 3 30 3.3 31 228 SUKFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Pala Indian Reservation canal at Pala, Calif , for 1912-lS—Gojitiiiued. Day. Oct. Nov. Dec. Day. Oct. Nov. Dec. Day. Oct. Nov. Dec. 1913-14. 1 3.6 3.6 3.2 3.6 4.8 4.8 "4.8 0' 1913-14. 11 4.8 4.4 4.8 4.8 4.2 3.6 4.8 4.8 4.4 3.8 1913-14. 21 3.6 3.6 3.6 3.6 3.6 4.8 4.8 2 12 22 3 13 23 4 14 24. 5 15 25 6 4.4 3.6 4.4 4.8 4.8 16 . . 26 7 17 27 ... 8 18 28 a 9 19 29 . ... 4.8 4.8 4.8 10 20 30 31 Note. — Daily discharge computed from 1 whicli discharge is not shown. well-defined rating curve. No record reported for days for SAU LUIS REY DITCH NEAR SAN LUIS REY, CALIF. Location.— In SW. i NW. I sec. 3, T. 11 S., R. 4 W., half a mile below iotake and 2 miles northeast of San Luis Rey, San Diego County. Records available. — April 8 to 19, 1913. Gage. — Vertical staff one-half mile below intake. Discharge measurements. — Made from bridge 400 feet above gage or by wading. Channel and control. — Sand and silt; not permanent. Accuracy. — Stage-discharge relation not permanent. The rating curve is defined by two measurements. Gage read to hundredths twice daily. Daily discharge as- certained by applying mean daily gage height to rating table. Records fair. Intake of ditch is on left bank of San Luis Rey River in Guajome grant, near north- west boundary, about a mile above intake of Libby ditch. This ditch was originally used by the Fathers of San Luis Rey Mission. It is now owned by a corporation and is used for irrigating about 1,200 acres of sugar-beet land. The irrigation season lasts only for a few weeks each year. Discharge measurements of San Luis Rey ditch near San Luis Rey, Calif. , for 1913. Date. Made by — Gage height. Dis- charge. Apr. 8 19 F. C Ebert Feet. 0.83 .27 &c../,. H. D. McGlashan 2.5 Daily discharge, in second-feet, of San Luis Rey ditch near San Luis Rey, Calif., for 1913. Apr. 9.7 6.8 4.7 3.7 2.6 2.8 Apr. 14 7.5 15. 16. 17- 18. 19. 12.7 4.0 2.2 6.4 4.0 SAN LUIS KEY RIVER BASIN. MISCELLANEOUS MEASUREMENTS. 229 Measurements of discharge in the San Luis Rey River basin at points other than those at which gaging stations have been main- tained are recorded in the following table: Miscellaneous discharge measurements in San Luis Bey River drainage basin for 1894-1918. Date. Stream. Locality. Gage height. Dis- charge. May —,1894 Oct — , 1894 San Luis Rey River . Feet. See.-ft. 6,720 do Dec. 8, 1894 Dec. 20,1894 do 10 ao 240 Jan 15, 1895 do 5,000 152 Mar. 8, 1895 Apr. 11,1895 Apr. 17,1895 May 10,1895 May 19,1895 Sept. — , 1899 Aug. 15,1903 May 21,1908 Feb. 2, 1911 Feb. 3, 1911 . do . do 100 do 72 do 39 do 19 ..do 3 5 do Warner dam site 2.8 do . do 5 2 do Float measurement at Warner dam site 40 do do 138 Feb 4, 1911 do ...do 742 Feb. 5,1911 Feb. 6, 1911 Feb. 7,1911 do do 130 do . . ...do 78 do do 63 Feb. 8,1911 Oct. 7, 1916 Nov. 18,1916 Nov. 25,1916 June 20,1899 do do 40 do Just below Warner dam site 1.12 1.29 1.31 18 do 11 do do. 14 do Above Headworks Escondido Mutual Water Co.'s Canal near Nellie. . -do 1.0 Aug. 19,1900 Aug. 14,1903 ... .do 2 do do .5 May 10,1914 Aug. 14,1916 do do 18 do do , 1.40 1.35 4.5 Sept. 13, 1916 Nov. 22,1916 Apr. 10,1912 do do 4.5 do .. .do 13 do do S W 1 sec. 36, T. 10 S., R. 1. W. near Valley Center. do 88 May 2, 1912 May 14,1912 22 do do ■•4 May 22,1912 June 16,1912 June 25,1912 July 11,1912 do. .. .do 4 6 do do 6 4 do, do 4 . do ...do ... 1 Aug. 4, 1912 July 20,1916 July 31,1916 Aug. 15,1916 Sept. 14, 1916 Oct. 10,1916 Nov. 23, 1916 do do 1 O-l do.... do 1 6 do do 1.3 do do 1 5 . . do. do . 4 9 do do 18 do..,. ... do ... 17 July 20,1916 July 31,1916 Aug. 15, 1916 Sept. 14,1916 Nov. 23, 1916 do Opposite lower pumping plant at Rincon. . do 9.00 9.06 9.06 8.99 9.04 4.6 do.. . . 3 1 do do do . do do 2.5 4 7 do . 16 Sept. — , 1899 do.. 2.5 Apr. 2, 1900 July 20,1916 Aug, 1, 1916 ... do . .. do 10 do..... Just above mouth of Pauma Creek LOO .94 .94 .85 14 do .... do - 6.1 Aug. 15,1916 do do 6.1 Sept. 14, 1916 Oct. 11,1916 Nov. 23, 1916 do do do do 7.7 28 do do 24 Jan. 27,1916 do Just below mouth of Agua Tibia Creek near Pala. do 675 300 July 19,1916 Aug. 1, 1916 do LOO .96 .90 19 do do 15 Aug, 15,1916 do do 12 Sept, 14, 1916 do do 15 Oct. 11,1916 do do ... . 43 Nov. 23, 1916 do do 35 Dec. 30,1917 Aug. 16,1903 do do 17 do Pala LI 6 Computed from cross-sections and slope data by U. S, Indian Service. 230 SURFACE WATEE OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Miscellaneous discharge measurements in San Luis Hev River drainage hasin, fw 1894-1 9T8~Contmued. Date. Stream. Locality. Gage height. Dis- charge. July 19,1916 Aug, 1,1916 Aug. 15, 1916 Sept. 14, 1916 Oct. 11,1916 San Luis Rey River . . do 1,000 feet above TTnited States Indian Serv- ice pumping plant at Pala. do Feet. sec.,.. 16 .... do ... do ..... 12 do do..., 19 do do do . .. do ^ . do.... 41 Nov. 24, 1916 Jan. 13,1916 Jan. 15 1916 do 1,000 feet above Pala bridge 9."i6' 8.7 34 67 do 217 Apr. .19,1912 Mar 13 1913 do do Mission bridge, NE. i NW. I see. 8, T. 11 S., R. 4W. - do ... 167 41 Aug. 5' 1916 Aug. 16,1916 Aug. 16,1916 Sept. 15, 1916 Aug. 5, 1916 do do do do 53. 06 1.1 5 do do do do 53. 05 a 2.0 & 3 1 do do do do do Opposite center sec. 18, T. 11 S., R. 4 "W C.25 Sept. 15, 1916 Opposite center sec. 13, T. 11 S., R. 5 W... . d Aug. 5, 1916 At Oceanside pumping plant d .0 Aug. 5, 1916 Half a mile above bridge at Oceanside d .0 Apr. 18,1912 Dee. 16 1917 Mouth 164 do . Oceanside 8.72 9.26 7 5 Feb. 19|l918 do„ do 66 Mar. 24 1918 . do.... ... do.. 45 Apr. 23^918 Jan. 9, 1913 Feb. 5 1913 do , do ., 8.K2 1.04 L23 13 Canada Agiia Calient e. do , .3 do .. 2 Sept. 25, 1913 Oct. 17 1913 do .. do... .2 .. do.... do ... 1 Feb. 4, 1914 do do L03 .95 .2 Mar. 6 1914 do . do . . .. 1.0 Mar. 24' 1914 May 9, 1914 May 9,1914 May 22,1914 June 15,1914 July 11,1914 July 22,1915 Sept. 25, 1913 Oct. 14,1913 Jan. 9, 1914 Jan. 30,1914 Mar. 25,1914 do do. .4 .....do.. do ,4 do . . do 6 do do do . .. do .2 9 do do ... .1 do .... do,... .4 Big Lake Creek do About 2 miles west of Warner S])rin£j5 .... do ...t 1.95 1.97 2.03 2.00 2.07 2.11 2.18 2.23 2.56' .02 .02 do . do .06 do do ... ,1 do..,. do,... „... .09 Apr. 14,1914 May 8, 1914 Oct. 16,1914 Apr. 19,1915 June 28,1915 do.... do do.. do .04 .05 do do do do , do, do .1 .65 .05 Feb. 3, 1913 Buena Vista Creek .... do.. Monkey Hill, about 6 miles southwest oi "Warner Springs. ... do 1.0 May 13,1913 Sept. 2,1913 Sept. 9,1913 Jan. 9, 1914 Jan. 30,1914 Feb. 4, 1914 Mar. 25,1914 .1 do do .. - .02 do.... do .02 . . do do .09 do do .. .2 do .... do, L80. L73 1.70 .3 do.... . . do .'09 Mav 8, 1914 July 11,1914 Mar. 13,1915 do do .02 do . . do .02 do. do 1.S5 1,3 Apr. 19,1915 June 28, 1915 Apr. 25,1914 May 14,1914 May 28,1914 Aug. 14,1916 Sept. 13,1916 Oct. 7, 1916 Nov. 22,1916 Aug. 14,1916 Aug. 14,1916 Sept. 13, 1916 Oct. 8, 1916 do do.. .3 do.,.. . do. 1. 63 .05 Lusardi Creek do About 4 miles below Warner dam site , do . .. L3 .7 do .... do .5 La Jolla Creek Above diversion at mouth of canvoii 1.00 1.00 1.00 1.03 .10 1.10 1.8 do do do do 1.2 1.9 ..do do 1.3 Potrero Creek do East Fork of Potrero Creek. do Below west ditch and above east ditch near La Jolla. At Rincon-La Jolla road crossing .3 .2 Above both diversions near La Jolla .9 ^do .15 .98 a Includes 1.5 second-feet flowing in Libby ditch. No surface flow between head of Libby ditch and quarter of a mile above Mission bridge, Aug. 17-21 . Flow at bridge reduced to 0.25 second-foot by evening. 6 No diversion by Libby ditcli for about 3 weeks. c Estimated. d Stream dry. SAN LUIS KEY EIVER BASIN. 231 Miscellaneous discharge measurements in San Luis Rey River drainage basin for 1894-1918— Conthmed. Date. Stream. Locality. Gage height. Dis- charge. Nov. 22, 1916 Sept. 13,1916 Sept. 13, 1916 Aug. 14,1916 Oct. 8,1916 East Fork of Potrero Creek. do do West Potrero ditch.... do Abo/e both diversions near La JoUa \bove dam and below west ditch Feet. 0.13 .10 Sec.-ft. O.S .5 BeJow both diversions .2 Intako ,6 Above darn .04 Nov. 22,1916 . .do do .08 Aug. 14,1916 Sept. 13, 1916 Oct. 8, 1916 ^Vest Fork of Potrero Creek. do do High >vav crossing near La JoUa 1.00 .94 1.03 1.02 04 do -07 do .13 Nov. 22,1916 do do .08 Aug. 14,1916 Sept. 13, 1916 Nov. 22,1916 Cuca Creek . . do Mouth .08 do .06 do do .1 Mav 10,1914 Escondido Mutual Water Go's, canal. Paradise Creek do 150 feet below weir at intake 17.5 July 20,1916 July 31,1916 Road crossing above E. M. W. Co's. power house. do .57 .30 .17 .07 1.17 1.06 b3.1 2.1 Aug. 15,1916 Sept. 13,1916 . . do . . do 2.5 do do 1.4 Oct, 10,1916 ... .do do 1.5 Nov. 23,1916 do .. do . 1.0 July 20.1916 East Fork of Spark- man Creek. do Pala-Rincon road crtBsLag -4 July 31,1916 do .4 Aug. 15,1915 do do Sept. 13, 1916 . do do .2 Oct. 10,1916 do do 2.5 Nov. 23, 1916 do. . - do 1.1 July 20,1916 Middle Fork of Spark- man Creek. do. . . do b.05 July 31,1916 do ... 09 Aug. 15,1916 do do b .05 Sept. 13, 1916 do do do .09 Oct. 10,1916 do 06 Nov. 23, 1016 do do .05 July 20,1916 West Fork of Spark- man Creek. do do 1.1 July 31,1916 do .5 Aug. 15,1916 do do. .. . 1 1 Sept. 13, 1916 do do do Oct. 10,1916 do 1.3 Nov. 23, 1916 do do Sept. 13, 1916 Ditch Diverts from West Fork of S^^arkman Creek .1 July 20,1916 do. . Diverts from Salmon's Spring 3 July 31,1916 do do .1 Aug. 15,1916 do. .' ....do 09 Sept. 13, 1916 do do .1 Oct. 10,1916 do do .02 Nov. 23,1916 do do .0 July 20,1916 Nigger Canyon Creek. . do. . . . Pala-Rincon road crossing 1.00 1.00 .97 .93 .4 Aug. 1,1916 do. .. 4 Aug. 15,1916 do do .4 Sept. 14, 1916 do do. . . .2 Nov. 23, 1916 do do .21 Feb. 12,1912 Pauma Creek One-half mile a]>ove Pauma Indian Reserva- tion reservoir. County highway bridge near Pala 1 ^ Apr. 20,1912 May 2, 1912 do 22. do do 6 6 May 22,1912 do do 4.1 June 15,1912 do do c .0 July 11,1912 do.. 1,500 feet above intake for Pauma Indian Reservation canal, about 2 miles above county highway bridge near Pala. County highwav bridge near Pala 1 9 Do do e Jan. 19,1913 do Near county highway ford on road from Pala to Pauma Indian Reservation. do do. ... Apr. 18,1913 May 19,1913 do do .96 8.5 c .0 Jan. 24,1914 do Near Pala .73 2 2 Apr. 25,1914 do do 10 May 14,1914 do do . 3 6 May 28,1914 do do 1.2 July 20,1916 do Just ]>elow intake of ditch 4.0 Aug. 1, 1916 do do 1.00 4.6 a Sinks into sand before reaching river. c stream dry. 232 SURFACE WATER OF PACIFIC SLOPE^ SOUTHERN CALIFORNIA. Miscellaneous discharge measurements in San Luis Rey River drainage 1894-1918— Qontumed. for Date. Stream. Locality. Gage height. Dis- charge. Aug. 15,1916 Sept. 14, 1916 Nov. 23,1916 Jan. 13, 1916 Pauma Creek Just below intake ditch Feet. 0.92 1.02 Sce.-ft. a 2. 6 do do 2. 1 do do do. 3.5 4.9 Jan. 15, 1916 do .. do do 22 July 20,1916 Oct. 11,1916 do . 1.00 1 3 do do 3.2 July 20,1916 Aug. 1,1916 Aug. 15,1916 Sept. 14,1916 Nov. 23,1916 July 20,1916 Aug. 1,1916 Aug. 15,1916 Sept. 14,1916 Oct. 11 1916 Pauma ranch ditcL.. do Intake 1.4 do 1.3 1.03 1.04 3.0 do do 1.5 do do 1.4 do do . .78 Fre7 Creek .4 do .do .2 do do . .2 do .....do 1.0 do. ... . do. . 1.3 Nov. 23,1916 do do .53 Aug. 15,1903 Oct. 9,1903 Mar. 29,1912 Apr. 20,1912 July 19,1916 Aug. 1, 1910 Sicklers ditch Bidder's ranch near Pala 2.1 do do 2.1 Agua Tibia Creek do Near mouth in sec. 3i, T. 9 S., R. 1 W 1.3 do . . 2.7 do do Above intake of ditch at mouth of canyon. . . do .48 .50 .43 .27 .67 &2.6 b2.2 Aug. 15,1916 Sept. 14,1916 Nov. 24,1916 Jan. 13, 1916 do do do do . c2. 1 do do dl.7 2.3 do. .. Pala-Rincon road crossing .6 July 19,1916 do do «.02 Oct. 11, 1916 do do c2 July 19,1916 Marion Creek Above diversion at mouth of canyon do 1.00 1.00 .97 .4 Aug. 1, 1916 Aug. 15,1916 do .4 do do .2 Sept. 14, 1916 Nov. 24,1916 July 19,1916 Aug. 1 1916 do do .3 do do .37 do Pala-Rincon road crossing e.2 do do .3 Oct. 11,1916 do do 1.1 Aug. 15,1916 Sept. 14,1916 Nov. 24-, 1916 West Fork of Marion Creek. do Mouth «.03 do C.04 do do .05 July 19,1916 Do McGee Creek Highway crossing east of Pala g .0 Jennie McGee Creek. . . Little Temecula Creek. Morena ditch Highway crossing at Pala g .0 Do . Highway crossing west of Pala C.07 June 26,1912 July 12,1912 Aug. 4,1912 Dec. 18,1912 Feb. 20,1913 2. 1 do do 1.2 .do do .9 do do :.... .4 do do .2 Mar. 13 1913 do .. do ....... .3 May 9^ 1913 June 13 1913 do do 2.1 do . .. . do .8 Oct. 6,' 1913 July 19,1916 Do.'.. do do .25 Monserate Creek Falibrook Creek Moosa Creek g .0 Mile north of Bonsall . . e.05 Jan. 27,1916 At daminNW. |sec. 1 T. 11S.,R.3 W., .. /S,346 .9 Jan. 13,1916 do half a mile below South Fork. Mouth July 19,1916 Do-. do do e.02 Gopher Creek Highway crossing southwest of Bonsall e.02 May 3, 1912 Do San Luis Rey ditch... Libby ditch One-half mile below intake, SW. i NW. \ sec. 3 T. 11 S., R. 4 W. Near intake, NE. \ NE. \ sec. 4 T. 11 S., R. 4 W., 2 miles northeast of San Luis Rey. do 1.34 .96 1.43 1.01 2.4 1.6 Jan. 17,1913 do «3.2 Feb. 1 1913 . do do .4 Apr. 8, 1913 Do do 1.8 do .. do .3 Apr. 19,1913 Aug. 5,1916 do do . - g .0 do... 2.0 a All diverted at about half a mile below. b All diverted by ditch. c All diverted except about 2 miners inches. d Most of water diverted but spilled back halfAvay down the ditch. e Estimated. / Computed by J. F. Covert. g Stream dry. SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. 233 SANTA MARGARITA RIVER BASIN. GENEBAL FEATURES. Temectila Creek, as Santa Margarita Kiver is kno^vn at its begin- ning, rises on the western slope of the San Jacinto Mountains in the northwestern part of San Diego County just north of the San Luis Key drainage basin, flows north into Riverside County, then west about 15 miles to Temecula, where it flows southwest through Temecula Canyon into San Diego County and empties into the Pacific Ocean as Santa Margarita River. The highest elevation in the basin is about 5,500 feet, on the divide between Temecula and San Luis Key. Temecula Creek has few tributaries, and the topography is rather broken, though there are several small valleys in the upper reaches. The rock formation through which it flows is a loose granite with good soil covering, and there is considerable growth of small, scrubby timber. The annual precipitation ranges from 10 to 30 inches and occurs almost entirely as rain. The discharge is heavy in the spring during the flood season, but is small during the rest of the year. GAGING- STATION RECORDS. TEMECULA CREEK NEAR TEMECULA, CALIF. Location. — In Temecula grant, at highway bridge on road from Temecula to Fall- brook and Pala, 1^ miles south of Temecula, San Diego County. Drainage area. — Not measured. Elevation. — About 1,000 feet above sea-level. Records available. — ^January,! to December 31, 1906 (gage lieiglits only.) Gage. — Vertical staff fastened to downstream pier on right bank. Discharge measurements. — ^IVIade from highway bridge or by wading. Channel and control. — Sand; continually changing; usually in two channels during low stages. Both banks are high and not likely to be overflowed. Daily discharge has not been computed on account of small number of discharge meas- urements made at times of excessive changes in channel. Discharge w.easurements of Temecula Creek near Temecula, Calif., for 1905-1908. 1905. Nov. 14 Dec. 30 1906. Jan. 12 29 Feb. 10 Mar. Made by- W. B.Clapp W.V.Hardy W.V.Hardy !!]!do;;!;!!;!;;;!;;];! ....do ....do ....do ..-.do ....do Gage height. Feet. 3. ID 2.90 2.94 2.99 3.20 3.49 3.42 3.82 Dis- charge. Sec.-ft. 5.8 4.4 4.9 4.4 3.3 6.0 5.4 16.8 12.0 1906. Apr. 13 27 May 15 June 26 Aug. 5 Oct. 10 Nov. 12 Dec. 4 29 1908. July 12 Made by— '. V. Hardy. .-do -do- C. H.Lee , R. S. Hawley. W. F.Martin. W.V.Hardy-. do do Gage iieight. Feet. 5.84 5.82 5.88 5.80 Dis- charge. Sec.-ft. 12.1 5.6 6.4 2.6 .8 3.9 7.6 7.2 14.9 234 SURFACE WATER OF PACIFIC SLOPE, SOUTHERl^ CALIFORl^IA. Daily gage height, in feet, of Teynecula Creel: nmr Temecula, Calif., for 1906. Apr. May. July. ' Dec. 2, 3. 4, 5 6. 7. 8. 9. 10. 11 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 2.9 2.9 2.9 2.9 2.9 2.9 2.9 3.1 3.0 3.0 3.0 3.0 3.0 3.0 3.0 2.9 2.9 2.9 2.9 2.9 2.8 2.8 2.8 2.8 2.8 2,9 2.95 2.95 3.0 3.0 3.0 3.0 3.0 3.2 3.2 3.25 3.25 3.25 3.25 3.25 3.25 3.25 3.25 3.3 3.4 3.4 3.0 3.5 3.45 3.45 3.5 3.5 3.55 3.5 3.6 3.9 4.9 5.0 3.7 3.7 3.65 3.3 3.4 9.6 7.6 6.0 5.5 5.5 5.9 5.9 5.9 5.8 5.8 5.8 5.8 5.8 5.8 5.75 5.75 5.75 5.75 5.75 5.75 5.75 5.75 5.75 6.75 5.75 5.7 5.7 5.7 5.75 5.75 5.75 5.75 5.75 5.75 5.75 5.7 5.7 5.7 5.7 5.8 5.85 5.85 5.85 5.85 5.85 5.9 5.9 5.85 5.85 5.9 5.85 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.75 5.7 5.75 5.8 5.75 5.75 5.75 5.75 5.75 5.75 5.75 5.75 5.75 5.75 5.75 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 5.8 6.0 6.0 6.0 6.0 5.9 5.9 5.9 5.9 6i0 5.9 5.9 5.95 6.0 6.0 6.9 5.9 5.9 5.95 5.9 6.2 6.0 6.2 6.05 6.1 6.25 Note.— No gage-height record was kept from July 18 to Dec. 2, 1906. MISCELLANEOUS MEASUBEMENTS. Measurements of discharge at points in the Santa Margarita River basin and nearby drainage other than those at which gaging sta- tions have been maintained are recorded in the following table: Date. Stream. Locality. Gage height. Dis- charge. Nov. 14, 1905 Temecula Creek do .. . Feet. Scc..ft.^ July 11,1915 Mar. 10,1914 May 8,1914 Feb. 13,1917 Mar. 7,1917 Paube grant, just below junction with Arroyo Seco, in Nigger Canyon. Old gaging station near Temecula 2.4 . ..do 7.60 10 do do . . 9.1 do 14 do do 26 27, 1917 June 3,1918 Dec. 1,1915 do do 15 do . . . do 8.4 do At head of Temecula Canyon In Sept. 26, 1915 July 11,1915 May 8,1914 Dec. 1,1915 do 2h miles above railway station at Fallbrook. Just above junction with Temecula Creek at Nigger Canyon, Pauba grant. 300 feet above mouth 3.6 .1 Murrieta Creek -do . 1.2 Near mouth 1.1 Feb. 13,1917 do do 2.1 Mar. 7, 1917 27, 1917 June 3, 1918 do ..do 3.5 do do 1.7 do do .8 May 24,1899 1.08 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. 235 SANTA ANA RIVER BASIN. GENERAL PEATUItES. Of the three important streams that traverse the valley of southern California — Santa Ana, San Gabriel, and Los Angeles rivers — the Santa Ana is the largest. Its drainage basin, lying south of the San Bernardino Mountains and the Sierra Madre and taking waters from their southern slopes, is the most eastern and comprises b}^ far the largest area, including the northern part of Orange County, the northwestern part of Riverside County, and the southwestern part of San Bernardino County. Of the total drainage area, compris- ing between 1,800 and 1,900 square miles, about two-thirds is in the valley, but only a few hundred square miles yields much run-off. The Santa Ana rises in the heart of the San Bernardino Mountains, about 30 miles east of Highland, and flows westward for about 25 miles to the mouth of its upper canyon; thence southwestward across San Bernardino Valley, through the lower canyon in the Santa Ana Mountains, and across the coastal plain to the Pacific Ocean at Newport Beach. Although the course of the stream meas- ures about 100 miles, there is continuous surface flow from mountain to sea only during winter floods. Many small streams from the southern slope of the San Bernardino Mountains and a few from the Sierra Madre west of the Cajon Pass flow toward the Santa Ana, but some of these discharge water to the main stream only in the flood seasons, the ordinary flow either being diverted or sinking into the sand and gravel of San Bernardino Valley. The principal tributaries are Bear, Alder, Mill, Lytle, and Chino creeks. Altitudes in the Santa Ana drainage area range from a few feet above sea level on the coastal plain to 2,000 or 3,000 feet on the Santa Ana Mountains, 500 to 1,200 feet in the San Bernardino basin, and 2,000 to 11,000 feet on the southern slope of the San Bernardino Mountains. The more elevated regions are rough and rugged, and the mountain sides are incised by many canyons which are the result of active stream erosion. The rocks are granitic. The mesa and valley lands at the base of the mountains are composed of granitic gravel and sand of great depth. The higher mountain slopes sup- port considerable timber; the lower slopes are as a rule covered with brush and grass. The mean annual precipitation varies considerably in different parts of the Santa Ana basin. On the coastal plain west of the Santa Ana Range it averages 10 inches or more; eastward, in the San Bernardino Valley, it amounts to 10 to 16 inches. On the mountain slopes it ranges from 20 inches at the base to 40 inches or more near the crest, and in Bear Valley north of the highest peaks, such as San Bernardino and San Gorgonio, it may be even 50 inches. 236 SURFACE WATEE OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Considerable snow falls in the region of these high peaks in winter and remains well into the summer, especially on the northern slopes, from which the headv/aters of the Santa Ana come. Irrigation in the valleys of the Santa Ana basin has attained a very liigh state of development. Probably no other stream of its size in the United States is made to serve greater or more varied uses. To begin with, a portion of the flow is regulated by artificial storage in the upper part of the basin, and the water passes successively through three hydroelectric plants before reaching the mouth of the canyon. On leaving the lower plant it is turned into high-level canals and used for municipal supply and irrigation about Redlands and Highland. The irrigation water that escapes through seepage to the body of ground water is recovered from springs and flovvdng vfells and from pumped wells and is used for irrigation around San Bernardino and Riverside, the power for pumping being generated on the upper reaches of the stream. Bedrock obstructions at Riverside Narrows, below the city of Riverside, force to the surface a part of the water in the gravel bed of the stream above this point. Only a few miles below it is again diverted and used for irrigation on the coastal plain in the vicinity of Santa Ana and Anaheim. The seepage water from irrigation is once more recovered by numerous pumping plants and flowing wells on the lower coastal plain west of Santa Ana. It is thus evident that the same v/ater, in passing from mountain to sea, a dis- tance of not more than 1 00 miles, may be used at least seven times for power and irrigation. In like manner the water in many of the tributaries may be used several times before reaching the main stream. GAGING-STATION KECOPvDS. SANTA ANA RIVER NEAR MENTONE, CAUF. Location. — In SW. I sec. 4, T. 1 S., R. 2 W., near mouth of canyon, one-fourth mile above Southern California Edison Co.'s plant, one-half mile above mouth of Deep Creek, and 3| miles northeast of Mentone, San Bernardino County. Pre^ vious to October 1, 1914, station was maintained just above ford above V/arm Spring Canyon, IJ miles above present site. Drainage area. — 189 square miles (measured on topographic map); 182 square miles at original site above Warm Spring Canyon. Elevation. — About 1, 900 feet above sea level. Records available. — July 1, 1896, to September 30, 1918. Gage. — Gurley graph water-stage recorder with concrete well and house on left bank, one-fourth mile above power house; installed September 3, 1917. (See PL XI, ^.) Vertical staff, at same site and datum was read February 11, 1916, to September 2, 1917. (See PL X, B, p. 61.) October 1, 1914, to January 17, 1916 (when vertical staff was destroyed by flood), gage was maintained at different datum, 10 feet above water-stage recorder. Original staff was on leit bank 100 feet above ford above Warm Spring Canyon. November 9, 1898, gage was moved downstream to a site 800 feet below mouth of Warm Spring Canyon. After January 1, 1901, original staff was again read. Gage datum was lowered June 30, 1903, and new datum maintained until January 1, 1910, when all station equipment was destroyed by flood. January 23, 1910, new inclined staff was installed on left bank, 50 feet ^ar-t.^s" .' , . 1 ^^^BBBJBPsl'^jIB ba '"': "^ 9 SANTA ANA RIVER BASIN. 237 above former site, at a new datum. February 25, 1910, a vertical staff was installed on right bank, 100 feet above ford, apparently at a new datum. This gage was read until October 1, 1914, when station was moved downstream to present site. Discharge measurements. — Made from cable at gage, from highway bridges near station, or by wading. At original station cable was between gage and ford. Channel and control. — Gravel and boulders; shifting during high water. Veloci- ties are very high during flood stages and large numbers of boulders are moved downstream. Extremes op discharge. — 1896-1918: Maximum stage not known, as gage was de- stroyed by flood January 17, 1916; maximum discharge January 27, 1916 (discharge, 29,100 second-feet); minimum stage, 2.3 feet during parts of every month from October, 1913, to January, 1914 (discharge, 0.6 second-foot). Diversions. — The intake of the Southern California Edison Co.'s canal is at its plant No. 2, 2i miles above the gage. From the tailrace the water is carried across Santa Ana River and used for irrigation. The Greenspot pipe line originally di- verted water for irrigation below original station, but since 1903 it has been sup- plied from the power canal. September 7, 1911, its intake was changed to the forebay at Mentone power house. The record of combined discharge of river and canals did not include this diversion from the power canal until intake was estab- lished at forebay. Regulation. — Water is stored on Bear Creek at Bear Valley reservoir. Southern Cali- fornia Edison Co.'s power plants Nos. 1 and 2 are 5iand 2| miles, respectively, above the Mentone plant at the mouth of the canyon. Accuracy. — Stage-discharge relation generally permanent except during high stages. Rating curves have usually been fairly well defined. Gage read to tenths or half tenths once daily; in 1916 and 1917 read to hundredths. Daily discharge ascer- tained by applying gage height to rating table, or for short periods not covered by rating tables, computed by shifting-control method or estimated from discharge measurements. From 1901-1904 discharge was measured over weirs at head of canals except for the period, January 1 to May 31, 1901; February 26 to April 23, 1902; and January 1 to 22, 1903. Records fair. Discharge measurements oj Santa Ana River near Mentone, Calif ., for 1896-1918. Made by- Gage height. Dis- charge. Made by- Gage height. Dis- charge. June 20 July 28 Nov. 21 Jan. 27 Mar. 4 May 3 4 June 15 July 5 July 6 Aug. 8 31 Sept. 30 Nov. 14 Jan. 8 Mar. 9 Apr. 11 29 June 12 July 23 Sept. 8 Oct. 18 J. B. Lippincott. J. H. Quinton J. B. Lippincott.. J. B. Lippincott.. do do do do.. A. Q. Campbell. do ....do ....do ....do ....do J. B. Lippincott.. H. Crowe J. B. Lippincott.. do ...-do ....do do.. F. H.Olmsted.. 1.45 1.60 1.50 1.15 1.20 1.11 1.32 1.35 1.13 1.25 1.00 1.05 1.10 1.10 1.05 .95 Sec.-ft. 61.8 59.7 31.7 43.6 lOi 64 72 60 55 60 43 40 26 44 32 30 35 42 35 23 Nov. Dec. Jan. 12 Feb. 18 Mar. 23 May 6 31 June 15 July 15 27 Aug. 24 1900. Apr, 14 May 5 July 13 Nov. 20 1901. Feb. 5 23 Mar. 4 30 July 6 F.H.Olmsted., S. G. Bennett. do.... do.. do.. do.. do.. do...., do.. do.. S. G.Bennett.. ....do ...-do ....do S.G.Bennett. ....do ....do ....do ....do Feet, a 2. 10 2.13 2.34 2.16 2.30 2.45 2.27 2.21 2.30 2.30 1.85 2.25 4.35 2.35 3.30 1.70 1.35 1.15 Sec.-jt. 22 25 38 28 30 25.8 21 19.6 25.9 23.6 10.9 22.7 244 22.3 102 101 110 102 40.6 26.1 a New gage installed 800 feet below mouth of canyon. 6 Station moved back to old gage Jan. 1, 1901. 238 SUEFACE WATER OP PACIFIC SLOPE, SOUTHERK CALIFORNIA. Discharge measurements of Santa Ana River near Mentone, Calif ., for 1896-1918 — Con. Gage height. Dis- charge. S. G. Bennett.. do do S. G.Bennett.. do ---.do W. B.Clapp... S. G. Bennett.. W. B.Clapp. — do.... — ..-.do Clapp and Clausen W. B.Clapp do ....do ..do.. Clapp and Murphy. W. B.Clapp.. ...do ...do ...do ...do do. E.G. LaRue. Clapp and LaRue E. C. LaRue -do .-do .-do ...do .do. .do. R. S. Hawley. do .-do., -do.. ..do-. ..do.- C. H.Lee ...do ...do ...do .-.do .--do ...do ...do ...do ...do ...do M. P. Beeson . --.do --.do ..-do do.. C. H. Lee M. P. Beeson . do do do do.. R, S. Hawley. W.F.Martin. ..--do W. F. Martin . . do do do W. B.Clapp... Feet. L24 L25 1.03 1.30 7.00 3.30 2.50 1.10 .85 .20 L15 L25 1.10 1.65 1.38 1.25 1.40 1.45 3.82 3.95 4.1 4.65 3.35 'ec-ft. 30. S 32 37 4,906 1,068 565 132 95 56 24 16 21 24 10 17 10 11 188 138 132 113 81 79 4 3 2. 17 87 1.51 11 I. 57 15.8 1.54 12.8 1.45 6.7 3.50 351 5.40 1,410 5.80 1,870 4.15 677 3. 85 597 3. 70 405 3. 05 156 4.90 913 6,35 2,250 5. 90 1,780 5.25 1,200 3.00 130 3. 50 214 3. 60 148 3. 60 160 3. 50 149 3.00 70 2. 55 13.1 2.31 2.9 3.85 276 501 872 184 1907. June 12 27 Juiv 30 Aug. 22 Sept. 18 1908. Jan. 29 Feb. 20 May 15 1909. Mar. 5 23 Mav 12 June 18 July 9 Dec. 31 1910. Feb. 5 24 Apr. 13 28 June 7 July 20 Sept. 14 1911. Feb. 17 21 Apr. 8 22 May 25 June 26 Aug. 29 1912. Jan. 11 Mar. 20 May 27 Aug. 27 Oct. 23 1913. Jan. 15 Mar. 4 4 Apr. 23 July 12 Oct. 7 1914. Jan. 14 15 Keb H 28 Mar. U 29 Apr. 16 May 1 7 15 June 25 Aug. 13 Nov. 20 Dec. 23 1915. Feb. 16 26 Mar. 12 25 Apr. 8 15 May 15 23 June 28 July 15 Aug. 12 Nov. 2 22 W. F. Martin . W. B.Clapp.. W. F. Martin . do - W. B.Clapp.. W.F.Martin. do W. B.Clapp-. W. B.Ciapp.. W.F.Martin. W. B.Clapp-. do do.. ...do.. R. E. Haines. J. E. Stewart. do W. B.Clapp.. do J.E.Stewart.. W. B.Clapp. .. Vv^. V. Hardy - do do do -do-. H. D. McGlashan F. C. Ebert ..do.. .-do.. F.C. Ebert.... do ...-do do ....do F. C. Ebert ....do W. H. Spear H. D. McGlashan F.C. Ebert ....do F. C. Ebert--.-.. ....do ..-.do do a Antemeridian. b Postmeridian. SAISTTA ANA EIVER BASIK. 239 Discharge measurements of Santa Ana River near Mentone, Calif ., for 1896-1918 — Con. 1916. Jan. 4 It Feb. 12 Mar. 3 8 Apr. 8 May 18 28 June 8 July 8 21 Aug. 9 Sept. 7 Nov. 15 1917. Jan. 16 Feb. 12 24 F. C. Ebert do do-... do.... do.— do.... do do.-.. .....do.... do.... Ellsworth and Ebert... F. C. Ebei do.... t do do.... F.C. Ebert » ....do ....do Gage Dis- height. charge. Feet. 1.87 1.98 3.15 3.05 3.10 2.75 2.22 2.02 1.82 1.75 1.39 1.24 1.02 .85 .55 .6.5 .61 1.35 Sec.-ff. 5.9 11 785 579 642 387 196 137 106 96 54 38 20 10 3.7 6.0 4.8 49 Date. 1917. Mar. 6 26 Apr. 25 May 18 Sept. 7 Nov. 25 1918. Jan. 6 Mar. 5 17 21 Apr. 19 May 3 June 5 July 25 Aug. 7 Sept. 4 Made by— F.C. Ebert.. do.. Ebert and Dort. F.C. Ebert .-..do ....do F.C. Ebert.. do do do do .do.. .do-. C. W. Sopp. F.C. Ebert. do do Gage height. Feet. 0.71 .82 1.24 1.19 .72 .31 .30 .34 2.16 2.03 2.00 1.00 .86 .78 .74 .76 .87 Dis- charge. Sec.-ft. 7.7 9.9 35 29 8.5 1.4 1.2 1.4 118 85 78 8.8 4.5 2.G 2.6 2.0 3.0 Daily discharge, i n second-feet, o / Santa Anxi River near Mentone, Calif, for 18.96-1918. Day. July. Aug. Sept. Day. July. Aug. Sept. Day. July. Aug. Sept. 1896. 1 53 53 58 58 58 58 49 49 63 66 72 60 69 63 66 60 79 60 60 60 69 72 69 53 53 36 63 63 60 60 11 12 13 14 15 16 17 18 19 20 1896. 63 74 78 53 63 58 69 69 69 69 63 60 63 60 60 60 41 39 69 49 27 28 43 58 58 69 76 74 69 63 21. 22. 23. 24. 25. 26. 27. 28. 29. 30- 31. 1896. 69 78 78 78 63 49 58 58 78 66 72 50 51 33 35 38 41 41 51 69 69 50 53 2 51 3 43 4 42 5 49 6 54 7 39 8 43 9 49 10 58 Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1896-97. 1 63 78 60 58 45 43 53 53 49 58 63 58 49 49 50 39 49 51 51 51 38 43 42 39 39 39 170 49 49 49 49 33 33 33 33 33 33 30 30 30 30 30 31 30 30 30 30 30 30 30 30 31 31 33 33 51 36 36 35 35 3.1=1 33 33 35 35 35 35 35 35 35 35 35 35 35 35 35 36 36 36 36 36 36 36 35 35 35 33 33 39 39 38 35 58 56 33 33 33 30 27 27 27 27 43 41 48 53 76 53 81 81 72 72 81 81 91 91 91 91 91 91 91 101 91 540 300 204 204 140 140 140 186 204 140 101 101 101 81 81 72 81 620 300 280 153 153 140 126 126 140 114 114 126 126 114 101 91 126 460 140 140 126 101 101 101 81 101 126 101 91 81 126 91 81 81 64 72 72 81 170 126 114 126 126 126 114 126 126 140 153 153 140 140 170 170 186 186 170 170 170 186 186 186 153 140 126 126 126 126 114 126 114 ini 101 101 101 101 101 101 101 91 81 64 64 64 64 64 58 58 52 46 41 41 41 41 41 46 41 37 33 33 33 29 29 60 57 60 64 60 57 57 57 57 60 60 60 64 67 67 67 67 67 67 67 64 64 64 67 67 67 60 64 64 57 60 64 60 60 60 64 67 64 67 67 64 72 64 78 67 67 67 64 60 64 64 67 67 72 85 78 78 78 78 52 61 61 61 61 52 52 61 61 61 61 70 70 70 70 52 52 52 52 61 80 45 34 45 61 61 52 2 3... . 4 5 6 7 8.- 9 10 11 12 13 14 15 16 17 18 19.. . 20 21 22 23 24.. . 25 26.. . 27 28 29 61 30 61 61 ........ 31 .... 240 SURFACE WATER OF PACIFIC SLOPE, SOUTHERl^r CALIFORNIA. Daily discharge, in second-feet, of Santa Ana River near Mentone, Calif., for 1896-1918 — Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1897-98. 1 52 36 34 34 38 45 42 52 42 32 38 38 42 250 45 34 30 24 24 24 24 24 24 25 25 28 28 30 45 45 45 36 33 28 28 28 26 25 25 33 33 32 30 30 30 30 34 34 34 34 34 34 34 34 38 38 52 52 52 48 45 45 38 38 38 38 36 34 34 34 45 34 34 34 34 34 "■■22' 22 22 22 22 22 22 22 22 22 34 28 22 22 22 22 22 22 22 34 22 30 28 28 28 28 28 28 28 28 28 28 28 28 28 34 28 25 26 26 24 23 23 24 24 26 26 26 26 26 26 26 22 22 22 22 22 22 22 22 28 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 33 33 33 33 33 33 33 33 33 100 46 46 46 46 40 40 40 40 40 40 40 46 58 40 33 33 33 36 36 36 36 22 22 22 22 22 22 22 22 22 22 34 34 34 34 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 36 36 36 36 36 76 76 58 51 46 46 40 38 36 36 36 36 40 36 36 36 33 33 33 33 33 33 33 27 30 30 30 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 34 27 30 27 27 33 33 32 30 30 33 36 36 36 36 35 38 40 33 35 36 33 28 28 27 33 26 26 26 28 36 30 S3 33 33 34 27 27 27 27 27 27 27 27 27 27 27 27 24 24 24 27 30 41 34 73 73 34 34 41 41 41 48 41 41 41 34 34 34 33 33 33 33 33 33 33 34 33 28 28 33 34 34 34 32 32 30 30 29 29 29 29 29 28 28 28 28 34 27 24 27 27 27 27 27 24 24 24 24 24 22 22 25 24 24 24 22 22 22 22 24 25 25 25 25 25 24 40 40 28 28 26 26 26 26 30 30 87 87 66 66 149 87 66 66 58 58 58 58 51 51 51 51 58 58 58 58 51 24 22 22 24 25 27 27 24 20 20 22 22 24 24 22 22 22 20 20 20 22 19 20 22 22 . 22 20 22 22 22 22 48 46 46 36 36 46 46 40 40 46 46 40 40 40 36 36 36 36 36 36 54 58 58 58 58 58 42 42 40 40 34 24 25 24 22 22 22 22 22 20 20 20 22 22 22 20 22 22 19 22 22 20 20 20 22 24 22 22 21 21 40 42 43 40 40 40 38 38 38 46 46 54 51 46 46 46 38 33 33 40 42 42 42 42 40 36 40 40 40 - 40 40 22 22 22 22 22 24 24 24 24 24 24 24 24 24 22 22 22 22 22 20 19 20 20 20 29 29 22 21 20 19 19 40 40 40 40 38 36 33 40 51 58 58 54 51 48 46 42 46 46 46 46 36 36 36 33 40 33 40 33 36 36 36 19 19 19 14 14 14 12 12 12 12 12 12 12 12 12 12 12 12 12 11 11 11 11 11 12 12 12 12 12 12 12 36 2 36 3 36 4 36 6 36 6 28 7 28 8 . 29 9 40 10 45 n 45 12 45 13 42 14 40 15 36 16 ... 33 17 30 18 . 35 19 38 20 33 21 36 22 ... . 36 23.. 36 24 36 25 36 26 29 27 30 28 33 29 36 30 36 31 1898-99. 1.. . - 12 2 12 3 12 4.. . . 12 5 12 6 12 7 12 8 . . 12 9 12 10 12 11 12 12.. 12 13.... 12 14 12 15 12 16 12 17.. . 12 18 10 19 10 20 10 21 10 22 10 23 11 24 11 25 11 26 12 27 .. 12 28 12 29 12 30 12 31 NOTE.— No record Oct. 16 to Nov. 9, 1898. sa:nta ae-a eiver basin. 241 Daily discharge, in second-feet, of Santa Ana River near Mentone, Calif, for 1896-1918 — • Continued. 14 14 14 15 15 19 a 32 o 62 103 fll, 564 O408 190 156 114 114 114 114 102 91 Apr. May. 40 35 32 30 250 a 225 a 219 a 132 a 62 July. 142131°— 21— wsp 447- a Estimated. -16 242 SURFACE WATER OF PACIFIC SLOPE, SOUTHERI?^ CALIFORNIA. Daily discharge, in second-feet, of Santa Ana River near Mentone, Calif .,fm' 1896-1918:— Coiitijaued. Dec. Jan. Feb. Mar. Apr. May. Juae. 24 20 20 63 42 45 32 24 22 24 485 48 44 30 24 24 22 80 48^ 43 29 24 23 25 63 48' 43 30 24 23 27 63 56 42 27 24 23 28 31 40 40 29 2r^ 21 27 56 42 39 26 25 23 27 43 46 40 26 24 23 27 187 36 38 26 24 22 27 102 36 38 32 24 23 28 72 33 37 34 2,5 23 28 72 33 34 40 24 23 28 72 31 34 39 21 23 27 72 30 38 39 22 23 28 42 30 34 47 24 23 28 29 30 35 45 25 23 28 31 29 35 45 24 23 28 31 29 35 45 2S 23 27 36 30 35 44 23 24 26 31 31 33 29 24 22 26 28 56 33 27 24 24 32 31 36, 32 27 24 24 33 36 37 33 26 24 45 30 48 54 33 39 24 41 33 56 49 32 35 23 28 240 63 47 34 30 23 25 80 72 46 31 32 22 26 63 68 43 31 31 22 25 68 46 31 23 24 21 63 44 31 23 24 21 56 31 23 20 102 36 4,910 112 79 23 20 42 36 1,060 112 79 23 20 42 36 565 112 79 22 20 36 63 345 106 79 22 16 36 125 345 100 79 22 16 36 63 200 100 79 22 16 42 48 179 95 76 21 15 42 48 169 90 76 21 15 48 48 142 90 76 21 15 48 42 112 90 73 27 15 55 36 112 90 73 21 15 55 36 112 90 70 21 10 55 38 112 90 70 22 10 55 38 106 90 65 21 10 55 42 • 106 90 62 22 10 42 42 126 90 60 19 10 42 42 179 90 58 21 10 36 42 160 90 56 24 10 36 42 142 90 56 22 10 36 36 142 90 56 24 10 42 36 142 86 56 24 10 42 36 126 112 56 2f) 15 42 36 119 86 50 23 18 42 48 126 86 50 23 20 42 150 126 86 48 24 20 42 315 126 86 48 25 20 42 125 126 82 48 21 277 42 125 126 82 46 24 63 125 112 80 46 21 63 150 112 79 55 20 63 2,450 79 July. 47.5 46.5 51.5 47.5 50.0 48.0 48.0 44.5 50.0 50.0 54.5 61.5 50.0 60.0 47.5 48.0 49.5 52.5 54.0 54.0 52.0 50.5 51.0 51.0 53.5 53.5 53.5 53.6 53.5 56.5 56.0 SANTA AISTA RIVER BASIN. 243 Daily discharge, in second-feet, of Santa Ana River near Mentone, Calif ., for 1S96-1918 — ■ Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1903-4. 1 45.5 45.0 30.0 38.0 36.5 35.0 33.5 35.0 39.0 49.0 44.5 38.5 39.0 42.5 49.0 47.5 51.0 55.5 51.0 53.0 50.5 51.0 54.5 54.0 54.0 54.0 56.5 56.0 54.0 55.5 55.5 49 56 56 52 50 51 50 48 46 44 37 54 48 43 43 43 44 50 50 52 54 56 52 56 49 46 45 49 41 45 22 51.5 37.0 32.5 . 32.0 28.0 27.0 28.5 29.5 31.5 29.5 30.0 29.0 29.0 29.0 29.0 29.5 29.5 29.5 29.5 29.5 29.5 27.5 27.5 27.5 27.5 27.5 27.5 27.5 27.5 28.0 22 20 20 21 21 22 20 20 19.1 19.6 19.5 20 20 21 21 19.6 20 20 17.7 18.6 19.8 19.8 19.8 19.5 18.0 19.3 19.3 22 19.3 29.5 27.0 27.0 27.0 26.5 27.0 27.5 29.0 27.5 28.5 27.0 26.0 25.5 25.5 24.5 26.5 27.5 26.5 26.5 26.5 27.5 27.5 27.0 27.5 27.5 27.5 27.5 27.5 27.5 27,5 27.5 19.3 19.1 21 21 20 20 19.8 22 20 20 20 19.8 19.5 20 18.4 19.9 22 21 20 20 19.3 19.7 19.7 20 21 21 20 20 20 19.9 23 27 27 27 27 25 24 24 26 26 26 26 26 27 26 26 26 26 26 26 26 25 27 28 28 27 28 28 28 27 26 26 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 80 5 1.5 1.5 1.5 1.5 1.5 1 1 1 1 1 42 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1 1 1 26 26 27 27 32 31 28 29 29 29 29 28 28 28 29 29 28 28 31 31 31 29 30 29 29 29 29 94 92 1 154 122 202 234 68 68 52 29 29 20 14 10 8 8 202 93 35 35 25 17 17 6 1 30 2 1 37 38 36 34 28 30 29 30 30 30 54 48 38 33 30 32 33 45 45 69 35 36 280 95 96 93 79 91 162 161 109 1 321 185 143 151 168 185 168 185 168 151 92 80 80 80 68 51 36 92 68 106 81 80 80 80 80 52 53 41 38 38 43 42 43 43 43 42 41 42 36 36 44 43 48 49 52 52 52 52 52 56 99 99 24 24 24 24 24 24 24 24 24 20 20 20 20 120 92 106 13 10 13 28 28 20 20 20 16 13 13 48 48 48 48 45 43 43 42 42 42 37 36 34 36 36 37 37 40 39 40 40 42 39 40 40 46 46 44 44 41 41 20 120 92 92 80 80 92 135 120 120 120 120 120 168 168 185 185 168 185 185 168 120 120 106 135 120 120 151 151 151 151 42 42 46 46 48 49 50 50 48 43 44 40 38 37 42 43 43 43 44 45 46 46 45 46 46 45 43 44 44 45 94 94 94 94 94 86 86 78 78 78 70 11 21 11 4 4 11 11 8 8 4 4 4 4 4 4 4 3 3 3 45 45 47 49 50 52 47 42 41 46 45 45 45 47 46 48 48 48 47 45 45 45 45 40 37 43 43 43 37 39 41 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 2 2 2 2 2 2 2 2 44 44 44 46 46 48 48 44 41 43 44 46 41 35 41 45 45 45 46 52 54 56 48 48 47 49 51 46 45 46 46 4(> 2 42 3 42 4 49 5 47 6 52 7 58 8 51 9 . ... 51 10 50 11 52 12 51 13 51 14 51 15 51 16 53 17 53 18 55 19 57 20 56 21 57 22 56 2\ 50 24 49 25 ^ 26 47 27 46 28 42 29 40 30 40 31 1904-5. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 IS 19 20 21 22 23 24 25 26 27 28 29 30 31 244 SURFACE WATER OF PACIFIC SLOPE, SOUTHERIT CALIFORNIA. Daily discharge, in second-feet, of Santa Ana River near Mentone, Calif., for 1896-1918- Continued. Oct. Nov. Dec. Jan. Feb. 6 6 3 3 3 1 3 2 3 3 3 2 3 1 1 1 1 1 1 1 1 1 1 3 3 3 3 3 3 3 3 3 11 122 2 78 88 3 11 25 1 2 6 10 44 2 6 10 63 2 6 63 2 6 63 25 6 63 128 6 63 200 6 63 17 48 6 11 6 10.5 2.5 2.5 27 181 10.5 2.5 2.5 18 181 10.5 2.5 5 10 241 10.5 2.5 26 10 275 10.5 2.5 26 10 275 10.5 2.5 2.5 69 275 10.5 2.5 2.5 69 155 10.5 2.5 2.5 69 155 10.5 2.5 2.5 69 108 10.5 2.5 2.5 775 88 10.5 2.5 2.5 210 88 10.5 2.5 800 210 69 10.5 2.5 100 241 69 10.5 2.5 52 275 69 10.5 2.5 2.5 241 62 10.5 2.5 5 275 52 10.5 2.5 5 275 88 10.5 2.5 1 400 69 10.5 2.5 1 330 52 10.5 2.5 210 52 2.5 2.5 210 210 2.5 2.5 210 700 2.5 2.5 210 700 2.5 2.5 210 475 2.5 2.5 69 400 2.5 2.5 52 400 2.5 2.5 100 52 400 2.5 2.5 151 52 155 2.5 2.5 151 52 2.5 2.5 155 2.5 38 69 Apr. May. July. 44 44 25 16 10 10 5 5 5 5 5 2,400 800 268 145 1,130 600 385 286 217 182 170 160 860 1,090 1,775 1,280 1,050 155 210 108 131 1,375 700 475 775 700 241 5-50 475 400 400 155 155 155 181 475 700 1,900 1,075 1,000 850 1,000 424 203 183 203 183 165 149 133 133 133 120 120 133 120 120 120 120 120 133 550 625 700 625 550 550 550 625 625 625 625 625 625 925 243 925 276 775 276 700 192 625 276 550 203 210 210 210 210 170 170 133 115 115 97 97 97 97 97 133 150 150 97 97 115 536 370 340 258 150 150 115 115 115 97 97 97 97 133 97 97 97 97 97 85 85 85 85 85 85 85 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 116 100 85 85 85 SANTA ANA RIVER BASIN". 245 Daily discharge, in second-feet, of Santa Ana River near Mentone, Calif ., for 1896-1918— Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1907-8. 1 4 4 4 4 9 9 4 4 4 4 4 4 4 4 4 22 15 15 15 9 9 4 9 50 22 15 15 40 40 40 40 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 40 40 40 72 72 72 31 9 4 31 72 72 72 72 72 72 72 72 60 60 60 60 60 50 4 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 4 4 2 2 2 2 2 2 2 2 2 2 2 I 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 120 195 91 43 120 155 120 120 2 2 2 2 2 2 2 2 2 2 2 2 2 33 2 2 2 2 2 2 2 1,335 206 97 52 29 81 29 19 11 11 9 105 105 240 91 54 33 24 16 24 24 24 16 9 78 66 66 66 66 66 66 66 66 66 66 66 78 ■ 78 174 6 2.5 1 81 29 19 575 381 180 135 157- 267 632 340 302 206 180 157 157 157 157 115 115 115 97 81 81 66 120 105 105 120 120 54 43 43 16 9 9 9 9 9 24 24 24 105 120 120 120 120 120 105 105 33 43 43 66 78 78 66 66 66 52 52 62 52 52 40 40 40 29 29 19 19 19 19 97 97 97 115 115 135 235 235 206 267 302 235 235 235 78 66 43 24 16 9 9 9 5 5 5 16 24 16 16 16 16 9 16 9 9 78 33 33 24 24 16 24 16 135 135 235 235 235 235 135 66 66 66 66 66 52 66 81 97 97 135 135 135 97 157 157 157 157 157 157 157 157 157 9 9 43 24 16 16 9 5 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 157 180 157 135 135 135 157 157 81 97 97 97 97 97 81 81 66 52 52 52 40 40 40 40 66 52 40 52 29 29 19 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 19 19 19 19 29 157 157 157 40 40 40 40 40 40 40 29 11 6 19 11 6 2,5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2 2 2 2 2 2 2 2 I 2 2 2 2 2 2 2 1 2 2 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 6 2.5 6 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2 2 2 3 . 2 4 2 5 2 6 2 7 2 8 2 9 10 2 11 2 12 . 2 13 2 14 2 15 2 16 2 17 2 18 2 19 2 20 2 21 2 22... 2 23 2 24 2 25 .. . 2 26 2 27 2 28 2 29 2 30 2 31 1908-9. 1 2.5 2 . . .- 2.5 3 2.5 4 2.5 5 2.5 6 2.5 7 2.5 8 2.5 9 2.5 10 2.5 11 2.5 12 2.5 13 2.5 14 2.5 15 2.5 18 2.5 17 2.5 18 2.5 19 2.5 20 2.5 21 2.5 22. . . . 2.5 23 2.5 24. 2.5 25 2.5 26 2.5 27 2.5 28. . 11 29 2.5 30 2.5 31 246 SURFACE WATER OF PACIFIC SLOFE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Santa Ana River near Mentone, Calif., for 1896-1918— Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug, Sept. 1909-10. 1. 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2,5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 4 4 4 4 4 4 4 4 4 4 4 15 15 15 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 29 2.5 2.5 2.5 2.5 19 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2 2 2 2 2 2 2 2 2. 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 425 575 97 66 19 6 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 81 81 2.5 2.5 2.5 827 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 o8j500 ]!!!!!! '"'ios' 63 154 123 103 103 103 85 85 3 3 3 3 3 3 3 3 3 175 62 16 1 1 74 62 32 3 1 113 127 32 6 1,160 193 158 38 38 38 48 26 48 38 38 63 103 103 103 63 63 26 26 26 26 26 26 26 26 26 26 26 26 26 26 193 158 127 360 213 158 142 142 127 113 99 99 99 158 158 158 99 86 86 86 74 74 86 86 74 86 26 26 26 26 26 26 26 26 26 26 26 26 109 109 26 26 26 26 26 26 26 26 26 26 43 43 26 26 63 48 48 86 86 86 290 158 142 142 290 690 1,840 1,400 900 570 435 435 375 325 325 325 280 240 240 240 240 240 240 240 240 240 240 240 48 74 43 26 26 18 11 11 11 11 53 63 63 63 63 63 53 53 fs 11 11 6 6 11 6 6 6 11 11 240 240 240 240 240 202 202 168 137 137 168 168 137 137 137 137 111 111 111 89 89 89 89 89 89 89 89 89 89 89 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 6 11 11 11 11 11 11 11 11 2 2 2 2 2 2 89 89 89 89 89 89 89 71 71 55 41 41 41 41 71 55 55 55 41 41 41 41 41 41 41 41 41 41 41 41 29 2 2 2 2 2 2 2 2 2 2 2 2 2 6 6 6 6 6 6 2 2 2 2 2 2 2 2 2 2 29 29 29 29 29 29 29 29 29 29 137 29 29 29 29 29 29 29 29 29 29 29 29 29 29 19 19 19 19 19 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 85 85 74 74 63 63 63 26 18 11 6 6 2 2 2 2 19 19 19 19 12 12 12 12 12 7 7 7 7 12 29 19 19 12 89 89 111 111 111 111 29 12 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 33 15 2 15 3 15 4 4 5 4 6 4 7 4 8 4 9 4 10 8 11 8 12 15 13 15 14 8 15 4 16 15 17 18 . . 19 20 21 22 23 24 25 26 27 28 29 30 31 1910-11. 1 . . 2 3 4 5 6. 7 8 9 10 11 12 13... 14 15 16 17 18 19. . 20 21 22. 23 24 25 26 - . 27 28 29 30 31 a Computed from cross-section and slope data obtained after the liigh water. SAHTA A2TA RIVEE BASIF. 247 Daily discharge^ in second-feet ^ of Santa Ana Eiver near Mentone, Calif., for 1896-19 IS— Continued. ]>ay. 11... 12... 13... 14... 15. . . 16... 17... 18... 19... 21.. 22.. 23.. 26.. 27.. 29.. 30.. 31.. 8.. 9.. 10.. 11.. 12.. 13.. 21.. 22.. 23.. 24.. 26.. 30.. 31.. 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 2.4 2.4 2.4 2.4 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 2 2 2 2.4 2.4 2.4 1.2 1.2 1.2 1.2 1.2 1.2 • 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 4.5 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 4.5 4.5 4.5 2.4 8.5 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 8.5 2.4 2.4 2.4 2.4 2.4 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 Apr. 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 14 8.5 71 42 55 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.8 1.8 8.5 8.5 14 8.5 8.5 8.5 4.5 4.5 4.5 . 4.5 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 July. 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 Note. — Daily discharge determined from a well-defined rating curve. 248 SUEFACB WATEE OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Santa Ana River near Mentonc, Calif., for 1896-1918 — Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1913-14. 1 0.9 .9 .9 .9 .9 .9 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .8 .6 .6 0.6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 31 1.2 9 .6 .6 .6 12 12 4.5 1.2 1.2 .9 .9 .9 .9 .9 .9 .9 0.9 .9 .9 .9 .9 .9 .9 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .9 .9 .9 .9 .9 .6 .6 .6 .6 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 3.0 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 3.0 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 0.6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 .6 171 325 50 32 156 118 15 12 7 7 97 1,020 760 315 204 170 138 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 46 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 330 198 198 110 84 53 37 18 14 10 10 10 10 7 4 4 4 2 2 2 30 355 1,320 2,190 624 388 206 27 27 132 132 198 121 121 121 121 121 121 121 144 870 870 510 510 510 144 144 144 100 100 100 100 100 100 100 100 100 100 100 119 108 108 96 76 76 76 68 68 68 68 67 60 51 50 50 49 48 48 47 46 46 45 39 38 37 37 40 40 36 28 100 100 100 100 100 100 64 64 64 64 64 64 64 64 64 64 100 100 100 100 100 100 144 144 170 144 121 121 198 170 144 27 24 24 23 40 40 59 40 40 39 38 46 45 45 44 38 31 32 34 36 37 61 38 39 35 31 28 24 200 142 121 144 144 170 .70 144 121 121 121 121 144 170 170 170 144 144 144 144 170 170 228 170 170 170 170 170 170 170 228 198 108 108 108 96 96 86 86 76 76 68 68 60 60 60 60 59 58 58 57 66 55 48 47- 46 45 39 38 38 37 48 48 198 200 198 198 198 198 198 198 198 228 228 260 295 260 260 228 260 260 260 260 260 269 260 198 198 198 198 198 198 198 198 47 59 58 58 58 57 56 55 48 36 29 28 26 26 26 26 26 25 25 25 25 25 22 22 22 18 18 18 18 a 18 198 228 228 190 170 170 170 170 170 170 170 170 144 144 144 144 144 144 144 121 • 121 121 121 121 121 121 121 100 100 100 18 13 13 13 13 13 13 10 10 10 10 10 10 10 3 3 3 3 3 2 2 2 2 2 2 2 2 2 2 2 2 100 100 100 100 100 100 100 100 100 100 100 100 100 81 72 72 64 64 64 64 57 57 50 64 64 57 50 38 38 38 38 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 29 29 29 29 29 21 21 21 21 18 18 18 18 18 18 15 15 15 15 10 5.5 5.5 5.5 6.5 5.5 5.5 5.5 5.5 5 5 4 2 2 2 3 . 2 4 2 6. .. 2 6 2 7 8 9 10 11 12 13 14 15. 16 17 18 19 20 21 22 23 24 25 26 ... 27 28. ..;... . 29 30 31 1914-15. 1 2 3 4 . . 5 6 3 7 3 8 3 9 2.5 10 2.5 11 2.5 12 2.5 13 2 14 2 15 2 16 2 17 2 18 2 19 2 20 1.5 21 1.5 22 1.5 23 24 25 26 27 28 29 30 81 a Interpolated. SANTA ANA RIVER BASIN. 249 Daily discharge, in second-feet, of 8anta Ana River near Mentone, Calif., for 1896-1918 — Continued. Apr. May. July. Aug. 1.0 1.0 1.0 1.0 1.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.5 2.5 2.5 2.5 2.5 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.3 2.3 2.3 2.3 2.3 2.f 2.3 2.3 2.3 2.3 26 2.7 3.5 3.1 2.7 2.7 2.3 2.3 2.3 2.3 2.5 3.1 15 15 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 3.1 3.5 3.5 16 2.7 41 5.5 6.5 228 163 15 22 5 2.5 47 35 935 700 700 700 700 700 700 700 835 700 700 835 835 835 700 595 595 595 595 595 595 595 . 1, 300 . 1,000 700 700 700 700 700 700 700 640 640 640 640 595 640 1,090 1,000 1,090 1,090 1,000 1,000 910 835 700 440 410 410 410 410 410 410 385 385 360 360 385 385 385 360 360 360 338 338 338 338 315 315 275 200 200 200 200 200 200 200 200 200 187 200 187 187 187 187 187 187 187 187 187 187 142 153 187 187 341 142 136 136 136 130 130 126 126 113 113 109 109 104 80 82 84 101 91 91 88 87 87 87 87 85 64 60 36 34 34 43 39 31 29 25 24 23 23 23 23 21 19 18 20 22 23 18 20 20 20 20 20 19 18 17 19 20 20 20 19 18 28 31 26 18 7.5 7.5 31 29 29 28 24 21 18 17 17 18 18 18 15 13 18 18 18 18 18 16 6 4.2 2.3 1.1 3.9 3.8 3.S 3.8 3.8 3.8 3.8 3.8 3.8 3.6 3.( 3.< 3.6 3.6 3.6 3.4 3.4 3.4 3.4 3.4 3.6 3.6 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4 3.4 20 11 6 5 4.2 4.2 9 6.5 6.5 4.5 4.5 4.{ 4.8 4.5 5 4.5 6 6.5 62 17 5 5 5 5 5 4.5 4.5 4.5 4.5 4.5 4.8 4.8 5.5 5.5 9.5 113 51 164 6.5 6.5 14 13 10 9.5 8.5 7.5 6.5 6 7 9.5 10 10 9 7.5 12 16 25 32 18 18 07 26 31 24 24 35 32 29 25 25 26 27 29 32 37 64 72 73 43 41 34 31 34 24 15 14 14 18 6.5 5.5 5.5 4.5 4.5 3.9 3.9 3.9 3.6 3.6 .3.0 3.0 3.0 3.0 3.0 2.9 2A 3.3 3.3 3.3 18 4.2 3.9 3.6 3.6 4.2 6 7.5 7 6.5 5.5 5 4.2 4.2 5 5.5 5.5 5 4.5 3.3 3.3 3.3 5 6.5 6 5.5 14 4.2 11 10 12 14 14 17 19 39 29 19 17 5 3.9 4.5 4.2 10 9.5 250 SURFACE WATEE OF PACIJFIC SLOPE; SOUIJHEIIN CALirORNIA. Daily discharge, in second-feet, of Santa Ana River, near Mentone, Calif ., for 1896-1918— - Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1917-18. 1 9.5 10 9 8.5 6.5 4.5 8 6 6 6.5 3.9 4.8 9.5 9.5 5.5 6 6 4.2 3.0 2.4 2.0 1.8 3.0 3.2 4.8 5 3.6 3.3 2.2 1.8 1.8 1.6 1.6 1.7 2.0 1.6 4,2 2.0 1.6 1.6 1.4 1.4 1.3 1.3 1.2 1.1 1.2 1:1 1.4 1.3 1.4 1.4 1.4 1.4 1.3 1.3 1.3 1.3 1.2 1.2 2.5 4.5 5.5 10 44 21 2.6 2.3 1.8 1.6 1.5 1.4 1.4 1.4 1.4 1.5 1.5 1.4 1.3 1.3 1.^ 1.5 1.4 1.4 1.4 1.3 1.3 1.3 1.2 1.3 1.4 1.4 1.4 1.5 1.5 1.4 1.2 1.2 1.2 1.3 1.4 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.4 1.2 1.1 1.1 1.3 1.1 1.2 1.4 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.3 1.3 1.3 1.3 1.3 1.3 1.4 1.4 1.4 1.4 1.8 6 20 1.8 1.7 37 11 2.0 1.6 1.6 1.4 1.4 1.3 1.3 1.4 1.4 1.6 19 2,390 545 123 1,860 1,770 3,970 1,810 495 278 184 123 80 112 109 80 80 78 70 68 62 62 49 39 39 40 39 42 39 32 23 21 20 20 19 16 15 16 29 25 16 12 10 8.5 8.5 9 9 11 7.5 8.5 8.5 9 9 8.5 8 7.5 6.5 5.5 5.5 4.5 6 7.5 7.5 9.5 10 6 4.5 3.8 3.8 6.5 7 6 7 6.5 7 4.8 4.0 3.2 3.2 2.8 2.8 2.8 3.5 6,5 6.5 4.2 3.0 2.8 11 2.8 2.8 2.7 2.6 2.4 2.2 2.2 2.2 2.4 2.6 2.7 2.8 3.8 17 20 6.5 4.5 3.2 2.2 2.1 2.1 2.1 2.1 2.2 2.2 2.4 2.4 2.7 2.8 3.2 3.0 2.8 3.0 2.8 2.7 15 18 7 6 4.0 2.2 2.1 2.0 1.8 1.6 1.5 1.5 1.6 1.8 2.0 2.1 2.0 2.1 2.4 4.0 1.5 1.5 1.8 2.2 2.2 2.4 5.5 3.5 2.2 2.0 2.8 5.5 9 10 8 4.5 3.8 3.2 3.0 2.8 2.8 2.6 2.7 2.4 2.0 1.8 6 15 6 2 3.1 3 3.1 4 2.9 5 2.2 6.. 2.2 7... 2.2 8.;. 2.2 9 2.2 10 22 11.. 6 12 .3.3 13... 3.6 14. 4.6 15 6.5 16 8 17 7.5 18. 7 19.. 6 20. .;.: 4.3 21... 4. 22. . .. 6.5 23 5.5 24 4.0 25. 2 2 26 2.0 27 2.2 28 2.2 29 2.0 30 2.0 31 Note.— No record: Sept. 1-30, 1897; Oct 16 to Nov. 9, 1898. Interpolated June 30, 1914; Jan. 18 to Feb. 10, 1916 (gage out). Sept. 4-6,1917, no record— disetiarge interpolated. Discharge estimated from discharge measurements Oct. 1, 1914, to Jan. 28, 1915. No gage height record July 10-12 and 26, 1918— discharge esti- Monthly discharge of Santa Ana River near Mentone, Calif ., for 1896-1918 1896. July August September.. The period. 1896-97. October November December January February March April May June July August September Discharge in second- Maxi- Mini- mum, mum. 170 51 39 101 620 460 186 101 67 85 56 55 54 33 35 63 181 67 58 47 Run-off (total in acre- feet). 3,935 3,443 3,273 3,320 1,964 2,152 3,874 10, 052 7,194 8,688 3,751 3,749 4,120 3,566 2,797 55, 200 1897-98, October November. . . December . . . January February March April May June July August September... The year. 1898-99, October November. . . December . . . January February March Discharge in second- feet. Maxi- Mini- mum, mum. 250 52 34 100 76 40 34 149 42 38 27 40 40 32 31 55 26 28 34 Run-off (total m acre- feet). 2,582 2,261 1,660 2,460 2,221 1,968 1,845 3,382 2,618 2,521 2,582 2,442 28,500 1,59* 1,309 1,353 1,599 1,555 2,091 SANTA ANA BIVER BASIN. 251 Monthly discharge of Santa Ana River near Mentone, Calif., for 1896-1918 — Continued. Month. Discharge in second- Run-off (total in acre- feet). Month. Discharge in second- leet. RunK)fl (total in Maxi- mum. Mini- mum. Mean. MaTd- mum. Mini- mum. Mean. acre- feet). 1898-99-Con. April 34 27 34 29 19 12 22 19 19 19 11 10 25 22 22 22 13 12 1,488 1,353 1,309 1,353 799 714 1906-7. October 10.5 2.5 800 775 ..700 2.5 2.5 .0 10 52 108 192 116 72 40 9 2 7.66 2.50 47. 8 166 216 608 476 170 101 66.2 21.2 10.0 471 May November December January 149 2,940 July 10,200 February 12,000 September 1,900 700 276 116 85 40 132 37,400 28,300 10,500 6,010 4,070 1,300 April The year 73 10 22.6 16,500 May..!'!!!!!"!! 1899-1900. 19 49 36 36 23 28 43 250 25 25 12 16 12 17 18 19 20 20 19 20 19 11 9 11 16 21 23 23 21 23 25 57 22 19 11 12 984 1,250 1,414 1,414 1,166 1,414 1,488 3,505 1,309 1,168 676 714 Jllly October . August November December January September The year 1907-8. October 595 1,900 .0 157 114,000 Februai-y March 50 72 4 195 240 120 78 43 2 2 2 2 4 4 1 9 9 5 2 2 2 2 2 13.9 45.0 1.68 31.1 65.8 67.7 22.3 5.81 2.00 2.00 2.00 2.00 April 855 May November December January 2,680 103 July 1,910 February March 3,780 September 4,160 April 1,330 357 Theyeai'..... 250 9 22.9 16, 500 May 119 1900-1901. 16 1,564 32 600 540 114 107 68 44 42 200 60 12 14 25 31 48 45 39 35 30 34 31 42 13 107 28 78 194 68 43 42 37 38 50 49 799 6,367 1,772 4,796 10,774 4,181 2,559 2,582 2,202 2,337 3,074 2,916 July 123 October August 123 November December January . September The year 1908-9. October 119 240 21.6 15,700 February March. . . 2 2 2 1,335 575 302 235 180 157 2.5 6 11 2 2 2 2 1 19 52 19 2.5 2.5 2.5 2.5 2.00 2.00 2.00 62.7 171 107 133 84.2 32.0 2.50 2.73 2.78 April 123 May November December 119 June 123 July 3„860 August February 9j,500 September 6,580 April 7,910 5, 180 The year 1,564 12 62.3 44,400 May.!!!!!!!!!!!! 1,900 154 1901. 96 36 2S 24 22 21 48 26 24 2,951 1,547 1,476 July October 168 November December September The year 1909-10. October 185 1,335 1 49.4 35,800 The Deriod 5,790 2.5 29 827 154 103 109 74 11 6 85 33 15 2.5 2.5 2.5 63 26 26 6 2 2 2 2 4 2.50 3.93 72.0 102 41.9 35.1 29.4 9.1 2.9 19.7 3.0 6.6 1906. 80 234 321 120 185 94 3 1 1 1 10 20 3 1 1 1 5.32 53.0 79.9 35.4 131 35.7 2.23 1.00 1.00 327 2,940 4,910 2,110 8,050 2,120 137 61.5 59.5 154 January November December January 23-31.... February March 234 February March . . . . 4,430 1,820 April 2,330 Mav ^ 2,160 June April 1,750 July. May .... 5G0 August 173 September July 1,210 184 The period . . 20,700 September 1910-11. October 393 1905-6. October 1 200 78 122 63 2,400 424 536 258 69 69 10.5 1 1 3 1 1 5 120 97 69 18 1 1.0 13.8 8.6 9.3 15.8 488 209 179 102 48.2 11.7 4.45 61.5 821 529 572 877 30,000 12,400 11,000 6,070 2,960 719 265 15 2 2 1,160 360 1,840 240 89 137 111 1 19 1,840 2 2 2 74 86 89 29 19 1 1 1 4.0 2.0 2.0 72.4 125 381 141 56.2 30.9 30.2 1.0 2.2 246 November December January November December January 119 123 4,450 February March February March 6,940 23, 400 . April April 8,390 3,460 May May Jiuie June 1,840 July July 1,860 August 61.5 September September The year 131 The year 2,400 91.6 66,300 70.6 51,000 252 SUEFACE WATER OF PACIFIC SLOPE, SOUTHEMsT CALIFORNIA. Monthly discharge of Santa Ana River near Mentone, Calif., for 1896-1918 — Continued. Discharge in second- feet. Maxi- Mini- mum, mima. Run-off (total in acre- feet). Discharge in second- feet. mum. mxxra. Run-off (totalin acre- feet). 1911-12. October November December January February March April May June July August September The year.. 1912-13. October November December January February March April May June July August September The year.. 1913-14. October November. . . . December January February March April May June July August September The year.. 1914-15. October November. . . . December...* January February March 3 1 1 1 1 280 71 14 2.4 1.2 8.5 2.4 1 1 2.4 2.4 1.2 1.2 1.2 1.2 1.0 1.0 1.0 1.0 30.8 23.9 8.36 1.28 1.20 1.83 1.64 61.5 61.5 58 1,890 1,420 514 76.2 73.8 113 97.6 1.2 2.4 1.2 2.4 4.5 2.4 1.8 1.8 1.8 89 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.8 1.2 1.2 1.2 .9 1.20 1.36 1.20 1.32 1.71 1.35 1.52 1.80 1.36 25.1 1.20 1.04 74 81 74 81 95 83 90 111 81 1,540 74 62 31 c ,020'' 2,190 119 200 108 59 18 2 2 2 28 23 37 18 2 2 1 45.7 64.3 33.3 6.6 2.0 1.2 41 157 44 7,130 11,600 3,630 2,720 3,950 1,980 406 123 71 2,190 31,900 1.7 1.7 3.0 1.7 1.7 1.8 1.8 100 64 1.70 1.70 1.88 26.5 214 103 105 101 116 1,630 11, 900 330 1914-15. April May June July August September... The year. 1915-16. October November... December . . . January 1-17. February 11-29. March April May June July August September. . . 2.0 2.5 26 935 835 1,300 410 241 109 66 25 1916-17. October November December . . . January , February March April May June July August September. . . , 31 18 20 73 73 18 The year . 1917-18. October November... December . . . January February March April May June July August September. . . 10 4.2 44 , 1.5 '37 3,970 42 10 20 18 15 22 The year.... 3,970 121 198 100 38 4.0 1.0 160 226 150 75.2 15.0 2.18 9, 520 13,900 8,930 4,620 922 130 1.0 58,200 1.0 2.0 2.3 2.5 595 410 200 113 • 77 26 17 1.84 2.27 4.16 90.9 726 763 331 170 89.4 46.5 20.2 17.4 113 135 256 3,060 27,400 46,900 19, 700 10, 500 5,320 2,860 1,240 1,040 7 1.1 3.4 4.2 4.5 6 18 4.5 2.8 3.3 3.9 3.0 19.6 6.15 4.49 8.40 25.6 13.6 32.7 39.5 4.63 5.41 1,210 366 276 516 1,420 836 1,950 2,430 276 333 775 404 1.1 10,800 1.8 1.1 1.2 1.1 1.2 1.3 7.5 2.8 2.1 1.4 1.5 2.0 5.22 1.52 4.03 1.25 3.85 469 16.9 5.42 4.06 3.43 3.91 4.58 321 90.4 248 76.9 214 , 28,800 ■ 101 ! 333 ' 242 ; 211 • 240 ; 273 44.3 31,200 Note.— For records 1902-1904, see monthly discharge of Santa Ana River and canals near Mentone, Calif., p. 258. SAISTTA AI^A EIVEK BASIN. 253 Combined daily discharge, in second- feet, cf Santa Ana River and canals near Ilentone, Calif., for 1909-1918. Day. Jan. Feb. Mar. Apr. May. June, J aiy. Aug. Sept. 1909. 1 42 40 40 40 39 41 82 78 75 157 105 95 651 437 256 211 233 313 632 340 302 282 256 233 233 233 233 191 191 191 173 157 157 142 142 142 142 128 - 128 128 128 128 116 116 116 ■ 105 105 95 95 95 95 173 173 173 191 191 211 311 311 282 343 378 311 311 311 211 211 311 311 311 311 211 142 142 142 142 142 128 142 157 173 173 211 211 211 173 233 ■ 233 233 233 233 233 233 233 233 233 256 233 209 208 208 230 230 154 170 170 170 170 170 154 154 139 125 125 125 113 113 113 113 139 125 113 125 102 102 92 92 92 92 92 102 157 157 157 ]00 100 105 105 105 105 105 94 89 82 97 89 82 84 82 82 82 80 80 78 76 76 76 74 76 72 72 72 72 73 Go 72 66 66 66 63 66 62 62 64 64 64 62 64 64 78 74 70 70 70 66 70 78 76 62 58 58 58 62 61 66 64 64 58 58 64 62 64 62 72 70 69 64 64 62 64 70 70 68 70 62 60 60 66 66 2 . 58 3 66 4 54 5 56 6 -- 53 7 8 39 39 37 65 51 58 58 9 56 10 11 58 66 12 50 68 101 66 62 60 51 50 48 79 L380 282 173 128 105 157 105 95 87 87 66 13 62 14 62 15 60 16. 62 17 56 18. ... 62 19 66 20 68 21 62 22 62 23 60 24 64 25 60 26 66 27 60 28 80 29 68 30 66 31 Day. Oct. Nov. Dec. Jan. Feb. Mar. J Lpr. M ay. June. July. Aug. Sept. 1909-10. 1 64 64 68 62 56 56 50 50 62 60 58 62 62 60 62 62 60 58 58 58 60 52 48 54 56 56 56 58 54 56 54 58 58 54 54 52 52 50 48 52 85 56 50 52 60 77 62 56 56 54 54 3 3 54 52 48 60 66 48 56 60 52 54 56 44 46 52 52 54 497 641 173 142 93 79 76 74 68 62 40 68 74 66 70 80 80 158 160 76 72 72 897 a 8, 500 ■"i67" 129 219 185 165 181 181 164 164 112 110 110 121 99 116 114 111 139 179 177 166 131 136 94 94 94 94 99 90 99 98 92 92 92 90 88 90 90 92 98 100 102 98 98 98 98 94 94 94 109 109 99 103 105 104 103 104 104 105 105 100 108 114 96 98 131 119 118 122 140 107 98 97 90 89 90 89 90 132 137 141 141 142 141 131 130 103 95 88 88 79 79 84 84 79 84 90 89 89 89 89 89 89 90 87 77 89 87 87 87 87 87 S4 87 79 88 89 88 87 87 87 87 85 80 75 76 76 75 75 75 74 74 74 57 76 74 74 73 74 70 65 73 77 79 79 77 72 70 71 68 62 66 62 62 59 61 61 61 fi2 59 60 59 58 58 65 61 61 61 58 57 64 58 66 68 85 85 74 74 63 63 63 69 72 66 60 60 68 70 65 65 57 59 60 58 59 61 61 64 60 57 58 61 57 58 60 59 70 68 70 68 66 64 62 61 65 64 65 62 95 73 2 73 3 74 4 58 5 55 6 59 7 59 8 64 9 . .. . 60 10 68 11 66 12 75 13 73 14 66 15 64 16 77 17 64 18 56 19 56 20 63 21 63 22 59 23 66 24 68 25 62 26 63 27 64 28 64 29 64 30 74 31 254 SURFACE WATER OF PACIFIC SLOPE, SOUTHERInT CALIFORl^IA. Combined daily discharge, in second-feet, of Santa Ana River and canals near Mentone, ' Calif., for 1909-1918.— Continued. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. 72 54 45 44 261 158 313 159 103 96 63 48 44 45 230 158 313 160 103 95 61 47 46 43 198 158 313 161 103 95 62 50 44 43 431 362 313 161 103 95 61 46 46 44 284 231 312 163 101 86 . 55 47 45 44 229 215 275 163 101 88 59 46 43 44 213 214 275 163 101 86 62 44 43 43 213 362 239 145 102 86 61 45 43 43 199 761 209 145 101 88 62 43 44 248 185 1,900 210 129 101 83 66 44 45 130 172 1,470 241 115 137 83 73 43 43 84 171 972 241 115 107 83 73 44 44 59 171 642 209 115 105 83 71 50 43 56 231 508 210 115 105 80 60 54 43 146 230 507 208 145 106 81 56 50 43 133 230 448 207 129 106 86 56 47 43 90 171 397 182 131 106 105 59 47 46 74 158 398 183 129 103 93 53 46 46 65 159 398 182 115 106 95 48 46 47 62 159 353 161 114 106 88 61 45 45 59 146 312 161 115 106 89 66 47 44 57 146 312 160 115 105 89 56 46 46 55 159 312 161 115 105 111 56 46 45 62 158 313 160 115 106 111 60 44 43 186 146 313 159 115 106 ill 65 53 45 127 146 313 160 115 96 111 67 50 45 103 158 313 160 114 95 73 61 50 44 76 158 313 160 113 95 78 61 45 44 1,220 313 160 114 96 73 60 44 45 263 313 160 115 96 67 58 43 230 313 103 71 79 52 45 47 44 39 68.4 93 71.4 63.2 63 50 47 49 43 44 73.4 96 71.4 52.2 60 50 39 46 43 44 73.4 93 69.7 55.2 59 55 49 46 40 54 75.4 87.5 67.7 55.2 57 55 46 46 43 50 73.4 87.5 64.7 52.2 55 52 48 46 42 351 75.4 88.5 64.7 48.2 55 50 47 46 42 112 73.4 85.5 64.7 47.2 51 50 48 49 42 83 75.4 88.5 62.7 59.2 52 51 48 47 40 66 92 94 60.7 60.4 53 51 48 45 40 311 86.5 94 61.2 60.4 52 61 42 45 40 142 150 94 59.2 59.4 64 52 . 48 46 40 88 120 94 63.2 63.4 66 51 46 46 42 126 132 94 55.2 62.4 66 51 44 44 40 102 135 94 61.2 66.4 64 50 46 44 40 104 135 94 59.2 65.4 66 50 45 44 40 102 137 89 59.2 64.4 66 50 46 46 42 89 135 88.5 54.2 68.4 68 50 48 43 42 78.5 121 88.5 54.2 61.4 63 50 48 43 40 75.4 121 88.5 54.2 62.4 65 51 46 44 40 65.4 110 84.5 61.2 56.4 62 50 46 42 41 73.4 104 84.5 61.2 59.7 60 47 46 42 38 73.4 94 81 61.2 58.7 59 48 46 43 41 68.4 94 76 63.2 61.7 55 50 46 42 41 65.4 94 78.9 65.2 61.7 61 48 47 42 38 67.4 94 78.9 63.2 65.7 64 48 45 42 38 67.4 94 78.9 65.2 65.7 72 48 45 43 40 68.4 102 75.9 68.2 65.7 58 48 46 44 40 68.4 101 75.9 68.2 63.7 57 48 51 43 39 68.4 96 78.9 65.2 65.7 55 48 47 44 79.5 93 78.9 73.2 65.7 52 47 44 75.4 77.4 63.7 SAKTA AN-A RIVEK BASIN. 255 Combined dedly discharge, in second-feet, of Santa Ana River and canals near Mentone, Calif., for 1909-1918— Gonthmed. Apr. May. July, 62 53 57 49 45 44 48 52 55 58 58 55 51 49 53 52 57 62 59 62 59 56 56 63 37 34 50 40 40 35 34 37 34 34 34 37 42 42 41 45 36 33 36 31 31 33 33 41 41 41 36 33 36 36 34 35 34 34 36 37 37 16 17 32 32 31 31 33 50 43 42 38 36 36 36 36 36 36 36 35 37 35 35 35 37 40 41 65 48 42 38 38 36 38 38 41 67 67 72 75 55 53 53 52 52 52 46 52 49 57 54 52 56 56 •56 56 58 58 61 65 64 65 59 56 60 56 56 51 54 56 56 54 56 59 51 58 62 66 64 61 61 63 63 62 60 59 60 55 55 55 55 53 53 57 56 59 54 62 62 57 54 52 53 58 56 61 63 66 61 57 61 56 51 61 62 62 60 64 64 66 64 60 60 56 52 30 62 54 99 57 52 47 57 53 58 56 58 61 61 59 49 56 54 56 59 57 59 55 50 52 31 29 22 22 22 18 24 21 105 36 31 29 30 31 32 30 30 30 30 27 30 30 30 27 27 27 27 27 27 29 29 26 26 26 27 27 27 27 35 35 32 32 . 30 30 30 30 27 27 27 250 404 130 104 236 192 94 84 74 68 176 1,060 830 392 281 247 217 184 158 129 113 90 85 79 79 79 73 68 96 435 1,370 2,240 665 429 258 108 108 213 213 177 157 157 157 149 149 148 148 147 140 131 130 130 129 128 128 127 126 126 125 119 118 120 120 116 108 107 104 104 103 120 120 139 120 120 119 118 126 125 125 124 118 109 110 112 115 116 132 119 119 115 111 108 104 276 221 187 186 186 174 174 164 164 154 154 146 146 138 138 138 138 136 136 136 134 134 134 126 124 124 122 116 116 116 114 126 126 124 136 136 136 136 136 134 134 132 120 112 112 110 110 110 110 110 109 109 109 109 109 104 105 105 101 101 101 101 102 97 97 97 97 256 SURFACE WATER OF PACIFIC SLOPE, SOUTHERliT CALIFORNIA. Combined daily discharge, in second-feet, of Santa Ana River and caiials near Mentone, Calif. , for 1909-1918— Contmued. Day. Oct. Nov. Dee. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1914-15. 1 67 78 78 57 57 57 57 62 55 55 55 55 62 62 62 62 62 62 57 50 51 47 58 58 58 58 58 58 58 58 57 70 70 70 65 65 C8 68 73 73 68 79 79 73 79 73 73 73 73 73 73 73 73 74 74 74 74 68 66 66 66 66 48 48 48 46 46 46 46 46 48 59 59 52 52 52 48 46 48 46 46 48 46 48 48 45 45 44 45 47 47 43 66 68 73 73 73 71 77 71 66 72 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 62 66 66 43 47 43 47 47 43 43 43 43 43 44 47 43 43 43 43 76 70 61 56 56 60 59 54 49 49 54 45 45 45 41 66 62 62 90 67 68 64 64 64 63 63 63 63 64 46 58 58 64 64 64 64 64 64 64 64 60 60 60 60 60 60 47 47 47 66 47 47 45 47 47 45 45 45 45 45 47 46 45 45 47 45 49 59 49 47 78 59 54 78 406 274 279 60 92 90 79 79 122- 86 82 304 239 91 98 81 78 123 111 950 279 202 202 202 202 202 202 202 225 951 936 571 571 582 216 216 216 172 172 172 166 166 166 166 172 172 172 166 ....... 700 700 700 700 700 700 700 835 835 835 700 700 835 835 835 700 595 595 595 172 172 172 163 168 168 138 132 129 144 144 144 144 144 144 144 189 180 180 180 180 181 225 228 254 228 204 204 282 254 228 595 595 595 595 1,300 1,000 760 700 700 700 700 700 700 640 640 640 640 640 595 640 1,090 1,000 1,060 1,090 1,000 1,000 910 835 738 500 470 204 228 228 253 253 227 204 204 204 204 227 254 254 256 230 230 230 230 253 256 276 256 256 254 254 254 245 245 303 273 466 470 470 471 471 446 446 426 426 451 451 457 426 435 429 407 407 407 407 384 384 407 384 344 305 279 279 275 282 282 273 335 273 273 273 273 273 273 273 303 312 339 379 344 344 312 344 344 344 344 344 344 344 282 282 282 283 283 283 283 283 288 282 282 282 274 294 274 274 274 274 274 274 274 274 274 274 230 240 274 274 241 228 222 222 222 218 218 214 214 200 200 283 313 313 283 255 255 255 255 255 255 255 255 229 229 229 229 229 229 229 206 206 206 206 206 206 206 206 185 185 185 202 202 198 194 192 192 178 176 174 176 178 194 188 184 184 182 182 180 180 180 180 180 180 180 178 178 176 174 170 170 185 185 185 185 185 185 185 185 185 185 185 185 185 166 157 157 149 149 149 149 142 142 135 149 150 143 136 124 124 124 124 160 158 158 158 154 152 148 148 148 142 140 142 138 152 148 144 144 144 132 132 130 128 128 136 132 130 124 122 122 122 120 115 115 115 115 115 107 107 107 107 104 104 104 104 104 104 101 99 99 99 94 90 90 90 90 90 90 90 90 90 90 89 118 82 110 110 110 no 108 106 112 114 116 110 72 110 112 114 114 114 114 108 108 106 106 104 104 106 108 108 108 106 106 89 2 89 3 89 4 89 5 89 6 88 7 88 8 83 9 82 10 82 11 82 12 82 13 82 14 82 15 ... 82 16 82 17 82 18.: 82 19 78 20 78 21 72 22 72 23 71 24 71 25 77 26 82 27 84 28 84 29 76 30 70 31 1915-lG. 1 106 2 . 104 3 104 4 102 5.. 100 6 100 7 100 8 100 9 . .. 104 10 104 11 104 12 104 13 104 14.... 108 15 108 16 106 17 112 18 112 19 112 20 122 21 112 22 110 23 104 24 110 25 112 26 114 27 114 28 114 29 114 30 114 31 SANTA ANA EIVEE BASIN. 257 Combined daily discharge, in second-feet, of Santa Ana River and canals near MentonCf Calif., for 1909-1918— ContinMed. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. 114 112 79 85 67 114 118 164 87 92 98 122 106 79 85 67 112 110 160 86 92 105 124 106 79 90 67 104 110 158 86 91 103 114 106 79 88 67 102 110 162 86 90 107 106 104 79 82 78 98 110 166 86 87 105 122 94 79 82 78 98 110 166 86 87 104 111 94 79 81 78 96 110 162 82 92 106 109 94 79 80 68 96 69 166 82 92 108 110 92 79 80 73 96 111 154 82 92 108 104 90 79 81 73 104 118 152 82 92 111 99 89 79 83 73 104 114 146 86 92 113 98 92 79 83 73 102 112 142 81 92 133 98 92 79 84 73 100 112 142 81 92 123 94 92 79 83 74 99 112 138 82 93 113 105 86 79 83 74 98 118 136 91 94 111 117 82 79 83 74 97 122 136 91 93 109 115 86 79 73 72 96 126 134 18 92 106 115 82 79 84 73 96 122 128 72 92 104 114 82 79 144 82 96 118 124 86 91 93 110 82 79 99 86 99 118 128 86 91 92 107 82 79 95 93 100 120 112 91 91 92 104 82 79 93 202 100 120 102 92 91 92 103 82 79 85 178 100 122 102 94 91 94 103 82 79 84 140 98 126 102 95 92 109 104 82 100 84 254 97 130 106 94 94 110 108 82 86 84 180 102 136 102 94 94 106 111 79 86 83 148 106 136 96 93 93 106 106 79 81 73 122 114 158 100 92 102 104 104 79 86 73 122 166 99 92 98 104 109 79 86 90 130 166 93 88 96 103 112 86 72 126 92 93 103 104 81 70 60 51 51 126 88 76 84 88 104 90 70 65 51 49 130 84 84 89 88 103 90 74 66 51 51 126 84 76 87 90 102 90 33 70 51 49 120 100 77 87 88 100 85 44 69 56 49 108 92 81 89 86 98 83 21 69 61 104 110 96 81 89 86 96 90 51 60 65 2,480 110 94 80 89 86 94 85 66 60 61 545 112 96 80 101 86 94 70 66 60 61 184 106 98 80 104 86 94 69 66 51 57 1,930 104 92 80 93 92 92 69 60 65 57 1,770 102 88 83 87 88 93 74 60 65 65 3,970 106 85 87 89 86 98 74 60 69 65 1,810 120 80 89 88 86 98 69 60 65 69 570 112 90 89 88 89 94 60 65 65 74 358 104 91 90 86 92 94 60 60 60 74 264 100 90 106 83 95 94 69 60 60 74 210 98 91 109 86 96 92 69 60 60 70 168 96 90 96 83 94 91 65 60 60 20 100 96 91 94 86 90 90 65 60 60 59 196 94 89 92 82 88 90 69 65 60 65 166 94 88 86 86 87 90 80 60 60 125 168 96 84 83 88 84 91 74 69 60 99 166 92 84 80 86 84 91 80 60 60 71 160 98 84 80 88 87 93 80 55 69 62 156 94 81 75 86 87 93 80 51 60 59 150 93 84 72 83 87 92 80 55 55 57 136 93 88 83 79 80 91 74 60 55 51 126 92 90 83 85 83 90 74 60 55 126 92 90 83 85 83 90 74 60 51 126 88 88 84 87 92 85 55 51 128 81 85 104 Note.— See pp. 262-270 for tables of daily discharge of Southern California Edison Go's, canal near Mentone and pp. 273-278 for tables of Greenspot pipe line. Previous to September 7, 191K discharge of Greenspot pipe line was not included in combined discharge tables. 142131°— 21'— wsp 447- -17 258 SURFACE WATER OF PACIFIC SLOPE, SOUTHERISJ' CALIFORNIA. Monthly of Santa Ana River and canals near Mentone, Calif., for 1896-1898 and 1902-1918. [Drainage area, 182 square miles. «J July August .... September . Discharge in second-feet. October November. . December. . January February . . March April May June July August September . The year.. October November . . December. . January February. .. March April May June July August September . October November. ■ December. . January February. . March April May June July August September . The period.. October November. December. . January February . . March April May June July August September. 104 585 405 190 113 8vil 3, 154 May .":::.::: : 2,, 521 2,618 Jmy 2,767 2,828 2,975 The veiii' . 280 24 42.2 .232 3.14 30,600 1904-:.. October . 56 22 23 108 234 321 120 256 94 69 82 79 22 17.7 18.4 22 26 48 • 63 91 64 57 52 52 48 20 20 36.6 97.6 130 90.5 172 ^ 62! 9 66.8 68.3 .26 .11 .11 .201 .536 .714 .497 .945 .427 .346 .367 .375 .30 .12 .13 .23 .56 .82 .55 1.09 .48 .40 .42 .42 2,951 1,180 1,230 2,251 5,420 March 7,993 April . . * 5,385 May 10,580 4,624 July 3.867 4,107 4,064 The year 321 17.7 74.2 .408 5,52 53, 700 1905-6. 67 250 107 181 121 2,440 495 536 329 140 111 74 42 30 31 34 33 51 186 163 135 90 67 58 49.2 47.5 38.4 46.8 63.1 530 274 245 172 119 80.5 64.1 .270 .261 .211 .2.57 .347 2.91 1.50 1.35 .945 .654 .442 .352 .31 .29 .24 .30 .36 3.36 1.67 1.56 1.05 .75 .51 .39 3.025 2:827 2,362 2,880 3,500 32,600 April 16,300 Mav 15,100 June 10,200 7,320 Julv August 4,950 September 3,810 2,440 30 144 .793 10.79 105,000 19IW-7. October . 71 69 859 851 776 1,960 776 352 186 154 109 132 66 54 56 86 128 184 265 186 142 109 78 62 71.4 60.3 111 239 292 681 552 236 171 135 90.2 73.2 .392 .331 .610 1.31 1.60 3.74 3.03 1.30 .940 .742 .496 .402 .45 .37 .70 1.51 1.67 4.31 3.38 1.50 1.05 .86 .57 .45 4,390 3.590 6,820 14,700 16,200 41,900 December Februarv March April 32,800 14,500 Mav 10 200 July 8,300 5 550 August September 4 ZGQ The year 1,960 54 226 1.24 16.82 163 000 1907-S. October 126 148 74 267 252 198 155 120 69 71 70 68 64 55 53 73 83 79 63 55 58 54 44 84.2 119 60.4 82.1 135 125 98.9 76.3 61.6 64.3 63.8 58.8 .463 ,654 .332 .451 .742 .687 .543 .419 . 338 . 3.53 .351 .323 .53 .73 .38 .52 .80 .79 .61 .48 .38 .41 .40 ..36 5,180 7,080 3,710 5,050 7 760 November December January.. February March 7 690 April.. 5' 880 4,690 3,670 3,950 3 920 May Juiie July August . . September 3,500 The year 267 44 85.8 .471 6.39 62, 100 260 SURE ACE WATER OF PACIFIC SLOPE, SOUTHER]^ CALIFORNIA. Monthly discharge of Santa Ana River and canals near Mentone, Calif., for 1896-1898 and 1902-1918— Conthmedi. 1908-9. October November December.. January February March April May June July August September The year 1909-10. October November December Jan. 23-31 February March April May Jime July August September The year 1910-11. October November December January February March April May June July August September The year 1911-12. October November December January February March April May June July August September The year 1912-13. October November December January February March April May June July August September The year Discharge in second-feet. 67 58 L,383 651 378 311 256 157 78 85 897 219 179 131 142 90 79 85 95 77 54 47 1,220 431 1,900 313 163 137 111 71 92 61 51 49 44 351 150 63 50 45 50 78 75 75 66 66 101 68 65 Minimum. Mean. 92 76 3 40 129 88 90 79 75 57 57 53 55 43 43 43 146 158 159 103 95 67 58 57 43 51 47 39 42 38 39 68.4 75.9 54.2 47.2 53.2 50.4 16 35 46 51 45 42.8 43.4 120 238 183 209 158 97.3 69.0 64.2 61.8 112 57.9 53. 1.38 173 112 103 105 84.9 69.4 65.0 62.5 65.0 61.4 47.0 44.4 12S 197 453 213 130 104 89 64.5 65.8 133 50.5 46.3 44.6 40.7 93.6 101 86.5 63.1 60.7 60.2 59.2 54.8 39.1 36.6 34.2 44.6 54.3 61.4 58.4 57.5 66.3 58.5 57.7 52.0 Per square mile. 0.318 .235 .238 .659 1.31 1.01 1.15 .868 .535 .379 .353 .340 .616 .318 .291 .747 .951 .615 .566 .577 .466 .381 .357 .343 .357 .337 .258 .244 .703 1.08 2.49 1.17 .714 .571 .489 .354 .362 Depth in inches on drainage area. 0..37 .26 .27 .76 1.36 1.16 1.28 1.00 .60 .44 .41 .38 .37 .33 .86 .32 .64 .65 .43 .41 .40 .40 .29 .28 .81 1.12 2.87 1.30 .82 .64 .56 .41 .40 SANTA ANA RIVER BASIN. 261 Monthly discharge of Santa Ana River and canals near Mentone, Calif., for 1896-1898 and 1902-1918— Continued. Discharge in second-feet. Run-off. Month. Maxi- muju. Minimum. Mean. Per square mile. Depth in inches" on drainage area. Total in acre-feet. 1913-14. 61 105 37 1,060 2,240 200 276 187 136 102 79 77 39 18 26 27 66 108 103 114 101 78 69 56 53.8 33.5 28.8 170 275 139 125 142 115 87.3 71.1 63.8 0.30 .18 .16 .93 1.51 .76 .69 .78 .63 .48 .39 .35 0.35 .20 .18 1.07 1.57 .88 .77 .90 .70 .55 .45 .39 3,310 1,990 1,770 . 10,500 15,300 8,550 February March 7,440 8,730 6,840 5,370 4,370 3,800 May July September 2,240 18 108 0.59 a 8.01 78,000 1914-15. October 78 59 76 406 951 282 303 379 313 185 115 47 43 41 45 166 129 204 273 185 124 89 70 59.1 47.9 49.2 76.5 287 181 242 307 235 160 100 81.3 .31 .25 .26 .40 1.52 .96 1.28 1.62 1.24 .85 .53 .43 .36 .28 .30 .46 1.58 1.11 1.43 1.87 1.38 .98 .61 .48 3,630 2,850 3,030 4,700 15,900 11, 100 December April... 14,400 18,900 14,000 9,840 6,150 May June July August 4 840 The year 951 41 151 ffl.80 a 10. 84 109 000 1915-16. October 79 73 90 950 835 1,300 471 294 202 160 118 122 65 62 46 60 595 470 275 200 170 120 72 100 71.4 67.5 63.1 163 726 768 399 254 183 140 108 108 .378 .357 .334 .862 3.84 4.06 2.11 1.34 .968 .741 .571 .571 .44 .40 .39 .54 2.71 4.68 2.35 1.55 1.08 .85 .66 .64 4,390 4,020 3,880 5,500 iMovember December ... February 11-29 27,400 47,200 23,700 15,600 10,900 8,610 6,640 6,430 March April May July September 1916-17. October 124 112 100 144 254 130 166 166 95 102 133 106 94 79 79 72 67 96 69 92 18 87 92 97 109 89.0 80.9 85.5 99.5 103 121 131 84.8 92.4 106 101 .577 .471 .428 .452 .526 .545 .640 .693 .449 .489 ..561 .534 .67 .53 .49 .52 .55 .63 .71 .80 .50 .56 .65 .60 6,700 November 5,300 4,970 January 5,260 5,530 6,330 March April 7,200 May 8,050 5,050 5,680 6,520 6,010 Jtrae July September . . The year 254 18 -100 .529 7.21 72,600 1917-18. October 104 90 74 70 125 3,970 130 100 109 104 104 103 85 60 21 51 20 49 88 81 72 79 83 83 94.2 75.7 58.6 61.1 63.6 536 104 88.7 84.6 87.4 88.5 89.2 .498 .401 .310 .323 .337 2.84 .550 4.69 .448 .462 .468 .472 .57 .45 .36 .37 .35 3.27 .61 .54 .50 .53 .54 .53 5,790 4,500 3,600 3,760 3,530 November Decem-ber January February March 33,000 6,190 5,450 5.030 April May June July . 5; 370 5,440 August September 5,310 The year 3,970 20 120 .635 8.62 87,000 o Drainage area 189 square miles for new site, beginning Oct. 1, 1914. Note.— For discharge January, 1899, to December, 1901, see tables of monthly discharge of Santa Ana River near Mentone. Discharge of Greenspot pipe line not included prior to September 7, 1911. 262 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORISTIA. SOUTHERN CALIFORNIA EDISON CO.'S CANAL i AND GREENSPOT PIPS LINE. NEAR MENTONE, CALIF. Location.— At Southern California Edison Co.'s power plant at mouth of canyon, 2| miles below intake on Santa Ana River, and about 3 miles northeast of Mentone, San Bernardino County. Records available. — 1896 to September 30, 1918 (not complete). Gage.— Hook gage above weir at end of flume below tailrace, on right bank of Santa Ana River about 300 feet west of power plant. Discharge. — Determined from gage heights which give head on 10-foot rectangular weir. The flood of January, 1916, destroyed flume and weir. Since that time discharge has been computed from records showing kilowatt output of power plant. Extremes of discharge. — 1896-1918: Maximum mean daily discharge recorded, 97 second-feet March 16, 1905; no flow during short periods in nearly every year. Diversions.— Since 1903, Greenspot pipe line has diverted water from this canal for irrigation, but the discharge was not included in record for canal. September 7, 1911, the intake was changed to forebay of canal, and since this date a record of the diversion has been reported. Accuracy. — Discharge determined from power-plant record, computed on the assump- tion that 1 second-foot develops 18.9 kilowatts. Record excellent when weir was used; remainder of record good. The intake of the canal is at Southern California Edison Co.'s power plant No. 2, 2| miles above the Mentone plant at the mouth of the canyon. All the water except that taken by the Greenspot pipe line is first used for development of power; after it leaves the Mentone power house it is conducted across Santa Ana River in a flume and discharged into a lined canal, from which it is distributed for irrigation. Before it enters the irrigation canal it passes through three power plants. Daily discharge, in second-feet, of Southern California Edison Co.^s canal near Mentone^ Calif., for 1901-1918. Day. Mar. Apr. May. Day. Mar. Apr. May. Day. Mar. Apr. May. 1 1901. 4.6 4.6 4.6 4.6 4.6 4.0 4.0 4.0 4.0 3.8 1901. 11 6.0 6.0 6.0 6.0 6.0 5.0 4.0 4.0 3.5 3.5 3.0 3.0 3.0 3.0 3.0 3.0 2.5 2.5 2.5 2.5 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 1901. ■ 21 3.5 3.5 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 4.6 3.8 2 12 22 3 8 3 . - 13 23 3.8 4 14 24 3.8 5 15 25' 3.8 6 3.0 3.0 3.0 3.0 3.0 16 26 3.8 7 17 27 .... 3.8 8 18 28 3.8 9 19 29 . 3.8 10 20 30 3.8 31 3.8 Day. Mar. Apr. Day. Mar. Apr. Day. Mar. Apr. 1902. 12 11 15 15 15 15 15 15 15 15 15 11.. 12 1902. 15 15 15 i 15 » 21 1902. 13 14 14 13 2 22 13 Q 13 13 15 15 13 14 14 14 14 23 12 I 14 24 5 12 11 15 25 6 16 26 7 17 27 g 18 28 9 19 29 10 20 30 .... 31 1 Published in early reports as Santa Ana canal and Mentone Power Co.'s canal and later as Pacific Light & Power Corporation's canal. SAKTA ANA EIVEPv BASIN, 263 Daily discharge, in second-feet j of Southern California Edison Co.^s canal near Mentone, Calif. , for 1901-1918— Gontimied . Day. Jan. Feb. Mar. Apr. May. Day. Jan. Feb. Mar. Apr. May. 1903. 3 3 3 3 4 10 9 9 3 3 3 3 3 3 3 3 3 3 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1903. 16 9 9 9 9 9 9 9 5 5 5 4 4 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 17 3 18 4 19 5 20 6 21 ... 7 22 8 . . . 23 9 24 10 25 11 26 12 27 13 28 14 29 15 30 31 Day. Apr. 25.3 23.5 23.5 23.5 23.5 21.6 23.5 24.4 24.4 24.4 24.4 25.3 24.4 23.5 23.5 24.4 24.4 24.4 24.4 25.3 23.9 25.6 24.4 25.3 24.4 25.6 23.5 23.5 23.5 23.5 23.5 22.5 22.5 23.5 24.4 32.3 27.5 25.6 25.6 25.3 27.5 27.5 27.5 25.6 25. f 25.6 26.6 30.4 29.4 28. ( 32.3 27.5 25.6 25.6 25. ( 25. ( 25.6 25.3 .0 .0 13.3 14.0 13.3 11.8 12.5 12.5 12.9 10.3 10.3 10.3 18.1 18.1 13.3 13.3 11.8 11.8 13.3 15.2 14.8 33. 18.1 19.8 .0 .0 .0 .0 .0 .0 18.1 .0 18.1 0.0 24.4 23.5 22.5 22.5 22.5 22.5 24.4 21.6 19.8 19. J 19. i 14.8 21. ( UA 14.8 14.0 .0 .0 .0 32.3 32.3 19.8 17.3 17.3 16.4 11.8 14.0 10.3 10.3 11.8 11.8 11.8 9.6 10.3 9.0 9.0 10.3 10.3 10.3 7.0 21.6 21.6 19.8 19.0 20.1 21.6 23.5 23.5 25.3 21.6 22.5 20.1 22.5 22.5 25.3 22.5 21.6 23.5 22.5 22.5 21.2 22.5 25.3 25.3 28.4 27.5 39.5 28.4 27.5 27.5 22.5 21. ( 21. ( 21.1 23.5 25.3 23.5 23.5 23.5 23.1. 23.5 23.5 23.5 23.5 23.5 21.6 21.6 .0 .0 .0 .0 .0 10.3 23.5 25.3 25.3 25.3 25.3 25.3 25.3 25.3 23.5 23.5 23.5 23.5 23.5 21.6 21.6 21.6 21.6 23.5 23.5 25.3 25.3 264 SUKFACE WATER OF PACIFIC SLOPE, SOUTHERiq- CALIFORNIA. Daily discharge, in second-feet , of Southern California Edison CoJs canal near Mentone, Calif., for 1901-1918— Continued. Apr. July. Aug. 59 58 59 37 49 47 38 37 38 38 51 47 47 18.] 18.] 18.] 18.] 18.] 18.1 18.] 18.] 18.1 18.] 18.] 18.] 18.] 18.] 18.] 18.] 18.] 17. J 18.1 17.5 17.5 17. c 17. 16. 19. 17. 19. 22 21 21 21 31 31 33 25 40 31 29 27 25 25 25 25 25 64 64 22 42 37 43 26 29 35 32 42 70 70 70 74 74 58 51 57 57 54 51 97 78 78 66 78 78 85 85 5? 63 72 78 78 43 71 56 58 73 51 56 76 76 76 71 71 71 32 29 61 58 58 61 63 63 63 63 61 61 61 61 61 53 53 51 61 61 61 63 63 63 63 81 66 73 73 73 76 76 76 73 73 51 51 56 56 46 46 61 56 51 43 41 41 46 46 41 32 32 32 32 41 29 29 30 32 29 29 34 32 30 29 30 30 41 50 34 32 34 32 32 32 32 32 32 30 32 32 29 29 32 32 25 25 25 25 25 29 28 30 29 27 34 34 34 34 34 35 45 37 59 30 37 37 41 38 35 35 33 33 33 32 32 32 32 35 35 35 44 41 42 52 53 51 49 52 51 50 50 40 27 43 55 71 35 34 25 55 34 21 27 56 55 52 65 70 70 73 74 71 72 71 70 71 71 71 71 70 71 71 71 70 72 71 70 70 71 71 71 64 70 70 70 70 70 70 70 71 70 72 71 72 72 72 72 72 72 72 70 71 71 72 72 72 72 72 72 70 70 66 SANTA ANA RIVER BASIN. 265 Daily discharge, in second-feet, of Southern California Edison Co.'s canal near Mentone, Calif., for 1901-1918— Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1906-7. 1 64 64 64 63 63 63 61 61 61 61 61 61 61 61 61 61 61 64 63 63 67 67 67 67 67 67 66 64 68 67 67 64 64 63 68 77 73 73 69 64 66 64 64 64 64 67 72 72 73 71 71 64 70 74 76 76 76 76 76 76 76 76 67 60 60 62 64 66 66 56 60 60 60 60 58 54 57 54 54 56 56 54 57 53 53 53 52 52 59 56 57 62 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 70 70 65 64 60 64 62 61 70 71 71 72 67 60 60 68 61 59 74 72 72 65 68 65 65 59 59 59 56 61 59 76 74 74 74 73 74 60 60 60 59 57 59 67 62 59 60 72 62 61 61 60 60 60 59 59 59 56 56 55 54 55 55 54 . 55 55 55 55 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 '"'76' 76 76 76 76 76 76 76 76 76 76 76 55 55 55 55 53 53 53 53 53 53 53 53 55 63 63 61 61 61 61 55 55 57 57 70 72 70 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 » 76 76 76 76 76 76 76 76 64 76 78 78 78 78 76 76 78 78 76 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 77 58 56 66 68 72 72 74 66 77 77 76 78 78 78 78 78 76 ?^ 77 77 76 74 76 77 77 77 77 74 74 77 77 77 77 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 73 76 77 77 77 77 77 77 i 74 74 77 77 74 77 77 77 77 77 74 77 77 77 77 77 77 77 77 77 77 76 76 76 76 74 74 74 74 74 74 74 74 74 74 74 74 74 74 68 70 70 70 70 70 70 70 70 70 77 77 77 77 77 77 77 77 76 77 74 77 76 73 71 73 72 66 66 64 66 64 61 63 61 63 64 62 61 67 71 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 67 62 62 62 62 60 60 58 57 57 62 65 62 02 58 57 56 56 53 56 56 56 56 56 57 60 64 64 64 62 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 60 57 57 56 57 57 58 61 63 63 66 68 68 64 66 64 64 64 59 59 56 58 61 63 67 63 61 64 69 69 68 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 69 60 61 56 62 62 63 66 52 66 62 66 60 68 68 68 64 62 59 63 63 58 59 62 62 61 61 61 61 60 60 60 69 2 69 3 69 4 69 5 69 6 7 8 69 69 65 9.. 65 10 65 11 60 12 58 13 62 14 62 15 62 16 62 17 64 18 66 19 66 20 21 66 22 64 23 ... 66 24 65 25 68 26 64 27 66 28 64 29 68 30 64 31 1907-8. 1 . . 59 2 60 i.............. 60 60 5 58 6 59 7 .. 59 8 59 9 ... ... 59 10 59 11 59 12 59 13 59 14 69 15 59 16 59 17 . . 69 18 60 19 59 20 58 21 58 22 56 23 56 24 75 25 55 26 49 27 44 28 43 29 42 30 44 31 266 SURFACE WATER Or PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Southern California Edison Co.'s canal near Mentone, Calif , for 1901-1913— QovAinued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. 58 65 40 40 76 76 76 76 73- 74 73 59 48 38 38 76 76 76 76 73 72 60 60 45 56 38 74 76 76 76 73 73 56 60 41 56 38 76 76 76 74 73 70 55 59 40 50 37 76 76 76 73 73 70 55 45 40 47 39 76 76 76 73 70 60 45 40 41 37 76 76 76 73 70 62 53 40 43 37 56 76 76 73 73 63 48 39 43 35 76 76 76 73 60 64 61 66 39 43 63 76 76 76 73 60 70 61 61 40 . 41 49 76 76 76 73 65 64 55 59 40 41 48 76 76 76 73 65 64 55 62 37 41 66 76 76 73 65 64 61 66 39 40 68 76 76 73 65 63 60 66 38 40 64 76 76 73 65 63 61 63 40 40 60 76 76 76 73 65 59 60 62 38 40 58 76 76 76 73 78 59 66 64 40 37 4,9 76 76 76 73 76 62 68 54 38 36 48 76 76 76 73 78 62 63 46 37 36 46 76 76 76 73 78 62 62 46 37 40 77 76 76 76 73 76 60 61 52 38 41 48 76 76 76 73 81 61 60 45 38 41 76 76 76 76 73 80 61 61 52 49 41 76 76 76 76 73 80 75 68 48 39 40 76 76 76 76 73 80 71 67 48 39 41 76 76 76 76 73 78 67 65 50 40 39 76 76 76 76 73 78 68 67 53 41 38 76 76 76 76 73 75 67 59 57 38 38 76 76 76 73 74 64 57 62 41 37 76 76 76 73 74 68 57 61 38 76 76 73 73 64 62 56 50 74 64 74 78 73 57 55 61 55 51 72 66 66 78 72 58 57 65 52 54 72 72 64 78 72 57 68 59 52 41 73 74 72 78 72 56 51 53 50 44 73 76 71 78 55 56 55 54 50 50 68 72 72 79 74 63 56 47 48 50 76 72 78 76 72 59 57 47 46 51 73 72 79 66 72 59 59 59 49 72 39 76 72 78 78 71 59 59 57 56 66 45 76 68 79 76 72 56 62 56 53 76 57 74 68 79 76 6S 55 58 59 47 76 52 63 68 74 76 63 62 55 60 49 74 58 68 78 76 71 56 56 58 57 73 54 73 78 76 71 64 59 59 58 73 58 68 73 79 73 73 68 55 60 59 71 49 68 77 78 76 73 56 58 58 65 66 68 79 78 76 71 58 56 53 59 62 68 78 77 77 66 57 56 51 38 55 73 77 77 78 64 68 55 51 65 55 64 78 77 77 65 66 57 .8 71 57 73 78 77 76 66 68 49 .8 63 57 72 79 77 76 60 66 45 51 68 64 66 79 73 76 64 43 64 51 49 78 66 66 74 73 76 60 54 62 54 46 78 65 66 65 73 74 60 55 60 54 57 77 62 64 71 78 78 57 54 59 54 63 79 62 62 70 73 73 59 54 63 55 46 74 78 64 72 78 74 59 66 62 52 5.3 70 78 68 79 74 59 68 63 54 58 70 79 71 78 73 60 63 60 51 70 79 70 73 63 62 SAN^TA ANA KIVER BASIN". 267 Daily discharge, in second-feet, of Southern California Edison Co.'s canal near Mentone, Calif. , for 1901-1918— Gontinued. Day. Oct. Nov. 68 52 59 46 57 45 f.S 48 57 44 51 45 55 44 5H 42 57 43 58 41 62 42 58 41 58 42 56 48 58 52 54 48 54 45 57 45 51 44 46 44 59 43 64 45 54 44 54 44 58 42 63 51 65 48 59 48 59 43 58 42 56 70 51 56 49 59 49 58 54 56 54 54 50 54 42 50 42 50 43 50 43 45 54 57 45 58 44 59 44 56 43 59 43 58 49 65 49 59 49 &6 50 60 49 59 46 58 40 54 42 60 40 m 40 71 40 57 40 56 40 54 40 51 Jan. Feb. Mar. Apr. May. June. July. Aug. 41 68 72 73 70 74 77 G4 42 72 72 73 71 74 76 70 40 71 72 73 72 74 76 66 40 71 72 73 72 74 76 65 41 71 73 72 74 72 74 65 41 71 73 73 74 72 76 65 41 71 72 73 74 72 74 6-1 40 71 72 71 74 73 74 63 40 72 71 72 74 72 76 62 73 72 60 73 74 72 76 60 68 73 73 73 74 76 6.5 68 72 72 73 74 78 76 66 58 72 72 72 74 76 76 m 55 73 73 73 74 76 73 66 72 72 72 71 74 77 74 66 71 72 73 70 74 77 74 66 58 72 72 71 76 77 76 6o 71 72 73 72 74 74 74 65 64 73 73 71 74 77 76 58 62 73 73 72 73 77 76 59 59 72 72 72 74 77 n 3.8 5.1 5.4 4.8- 5.1 5.1 4.8 5.1 5.1 5.1 5.1 5.4 5.4 5.7 5.7 5.4 5.1 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 6.0 7.0 July. 7.3 7.3 6.6 6.6 7.3 7.0 5.7 5.1 3.9 3.9 4.2 4.2 4.2 3.7 3.7 3.7 4.5 4.5 4.8 4.8 4.8 3.2 3.4 3.4 3.4- 3.4- 3.4 3.4 3.0 Aug. 3.0 2.8 3.0 3.0 3.0 3,0 4.2 4.2 3.4 5.7 6.0 4.2 3.7 2.6 .0 .0 2.6 2.6 6.0 5.2 5.1 5.4 5.1 5.1 4.8 4.8 4.8 1.1 1.7 .3 1.1 5.1 5.7 5.4 5.1 4.5 4.5 3.4. 4.8- 4.8 4.8 4.8 4.& 4^8 4.8 4.8 4.8' 6.0 6.0 4.5 5.1 5.4 5-.». 5.» 5.* 5.8 SANTA AJSTA KIVEE BASIK. 275 Daily discharge, in second-feet, of Greensfot pipe line near Mentone, Calif., for 1900- 1901, 190S-1904, ajid 1911-1918— Continued. Day. 1904. 1 2 3 4 5 6 7 8 9 10 Oct. Nov. Dec. 5.8 0.9 l.S 5.1 1.8 i.a 5.H .9 1.3 5.1 .7 .6 5.8 .7 7.2 .8 1.5 5.8 .6 1.3 5.8 .9 1.5 1.1 .8 1.3 4.4 1.3 1.3 Day. 1904 11 12 13 14 15 16 17 18 19 20 0.8 1.3 2.4 1.5 Day. 1904, 21 22 23 24 25 26 27 28....... 29 30 31 0.8 1.2 1.1 1.9 2.2 2.2 Day. Sept. Sept. Sept. 9.. 10.. 1.3 1.6 1911 11 12 13 14 15-. 16 17 18 19 20 1.8 .0 .0 .0 .0 .0 1.0 2.0 9.0 7.5 9.0 9.0 7.0 Day. 1911-12. 1 2 3 4 5 6 7 8 9 10 11 12.. L 13 14.... 15. 16 17 18 19 20 21.. 22 23 24 2^ 26 27 28 29 30 31..... 6.0 6.0 .0 .0 .0 .0 .0 .0 1.0 2.3 6.5 7.5 1.5 3.0 1.0 1.0 .0 .0 .4 .0 .0 .0 .0 .0 .0 .0 0.0 .0 .0 .0 .0 7.0 7.0 7.0 6.0 6.0 6.0 6.0 6.0 6.0 .0 .0 .0 .0 .0 ■ .0 i 7.3 i 7.3 ! 7.3 I 7.3 7.3 7.3 i 7.3 I 7.3 6.0 5.0 5.0 4.0 4.0 4.0 .0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 3.0 3.0 3.5 3.5 3.5 3.5 .0 .0 .0 .0 1.0 1.0 2.0 2.0 3.0 3.0 3.0 3.0 .0 .0 .0 .0 .0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 4.0 4.0 4.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 4.0 4.0 4.0 5.0 5.0 5.0 5.0 5.0 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4,5 4.5 2.5 2.5 2.5 2,5 3.0 3.0 3.0 3.0 3.0 5.0 5.0 5.0 4.0 Mar. Apr. May. June. July. 4.0 4.0 4.0 3.0 4.0 5.0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 0.0 .0 .0 .0 .0 .0 .0 .0 .0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 4.0 4.0 4.0 3.5 3.5 3.5 3.5 3.5 3.5 3.5 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 2.0 2.0 2.0 2.0 2.0 2.0 6.0 3.2 3.2 3.2 3.2 3.2 5.2 5.2 5.2 5.2 5.2 5.2 5.2 3.5 3.5 4.5 4.5 4,5 4.5 4.5 4.5 4.5 4.5 4.5 Aug. 4.5 4.5 4.5 3.0 3.0 3.0 3.0 5.0 5.0 5.0 5.0 5.5 5.5 2.5 3.0 3.0 3.0 3,0 3.0 5. a 5.0 5.0 5.0 5.0 4.0 4.0 4.0 1.0 5.0 5.0 5.0 Sept. 5.0 5.0 3.0 3.0 3.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 5.5 5.5 5.5 5. 5 5.5 5.5 4.5 4.5 4.5 4.5 4.5 2.5 2.5 2.5 2.5 2.5 276 SURFACE AVATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Greenspot pipe line near Mentone, Calif., for 1900- 1901, 1903-1904, and 1911-1918— Gont'mued. Apr. May. July. 4.5 4.5 6.5 6.5 6.5 6.5 6.5 2.0 2.0 2.0 2.0 2.0 2.0 3.0 3.0 3.0 3.0 3.0 3.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0 3.5 3.5 5.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 1.2 2.2 1.5 1.5 1.5 1.5 1.0 1.0 1.0 4.0 1.5 1.5 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 .0 1.4 1.4 1.4 1.4 1.9 1.1 1.9 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 8.5 6.5 6.5 6.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 2.5 2.5 2.5 2.5 6.5 6.5 6.5 6.5 6.5 2.5 2.5 2.5 2.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 S.l 3.5 3.5 3.5 2.0 2.0 2.0 4.0 4.0 5.0 5.0 5.0 6.0 .5 .5 .5 .6 6.0 6.0 6.0 4.0 4.0 2.0 2.0 2.0 2.0 2.0 6.0 6.0 6.0 6.0 6.0 6.0 3.0 3.0 3.0 6.0 6.0 6.0 6.0 4.0 4.0 4.0 2.0 2.0 2.0 6.0 6.0 6.0 6.0 6.0 4.0 4.0 1.5 1.5 1.5 6.0 6.0 6.0 6.0 6.0 2.0 2.0 3.0 3.0 3.0 5.0 5.0 5.0 5.0 5.0 1.3 1.3 1.3 1.3 5.0 5.0 5.0 .0 .0 .0 .0 .0 .0 4.0 4.0 4.0 4.0 4.0 4.0 1.5 1.5 2.5 2.5 4.5 4.5 4.5 4.5 4.5 4.5 2.0 2.0 4.5 4.5 4.5 4.5 2.5 .5 .5 3.0 3.0 3.0 2.0 2.0 2.0 1.4 1.4 1.4 2.9 2.9 2.9 2.5 2.5 2.5 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 1.5 1.5 1.5 1.5 1.5 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 .0 .0 .0 .0 2.0 2.0 2.0 2.0 2.0 5.7 5.7 5.0 5.0 5.0 5.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 4.0 4.0 4.0 1.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0 3.2 7.0 7.0 3.6 3.6 3.6 3.6 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.C 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0 7.( 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.f 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.6 7.( 7.6 7.6 7.6 7.6 7.6 7.6 7.6 5.0 5.0 SANTA ANA RIVEK BASIN. 277 Daily discharge, in second-feet, of Greenspot pipe line near Mentone, Calif., for 1900- 1901, 1903-1904, and 1911-1918— Continued. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 6.0 6.0 6.0 5.0 5.0 5.0 5.0 5.0 3.0 3.0 3.0 3.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 3.0 4.0 4.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 5.0 5 5 5 5 5 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7.5 7.5 7.5 7.5 7.5 5 5 5 5 5.0 B.O 5.0 5.0 5.0 5,0 5.0 5.0 5.0 5.0 5.0 6,0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5,0 5.0 5.0 6.0 6.0 3.0 4.0 4.0 4,0 4,0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4,0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4,0 4.0 4.0 4.0 4.0 2,0 2,0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2,0 2,0 2,0 .0 2.0 2.0 2.0 2,0 2,0 2.0 2.0 2.0 2.0 2.0 2,0 2.0 2.0 2,0 2,0 2.0 2.0 2.0 2,0 2.0 2,0 2.0 2.0 2.0 2,0 2,0 2.0 2.0 2.0 2.0 2.0 2,0 2.0 2,0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2,0 2.0 4.0 4.0 4.0 4.0 4.0 1.0 1.0 1,0 1.0 1.0 1,0 1.0 1,0 1,0 1,0 1.0 1.0 1.0 2.0 2.0 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 0.6 1 1 4.5 4.5 4.0 4.0 4,0 4,0 4,0 4.0 4.0 4.0 5.0 5.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0 7,0 7,0 5.0 5.0 5,0 5.0 5.0 5,0 5.0 5,0 5,0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5,0 5,0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 6.0 6.0 6.0 6.0 6.0 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8,5 8.5 8.5 8.5 8.5 8,5 8.5 8.5 8,5 6.0 6.0 6.0 6.0 6.0 6,0 6.0 6,0 6,0 6.0 6,0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6,0 6.0 6.0 6.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8,5 8.5 8,5 8.5 8.5 8.5 8.5 8.5 8.5 8,5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 278 SURFACE WATER OF PACIFIC SLOPE, SOUTHERI^ CALIFORNIA. Daily discharge, in second-feet, of Greenspot pipe line near Mentone, Calif., for .1900- 1901, 1903-1904, a7id 1911-1918— Gontinued. Apr. May. July. 8.5 8.5 5.0 5.0 5.5 5.5 5.5 5.5 5.5 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 5.1 8.0 6.0 6.0 6.0 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 4.5 4.5 4.5 4.5 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 .3.0 3.0 4.5. 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 i.i 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4,5 4.5 4.5 4.5 4.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 2.1 5.7 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.( 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5' 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 9.0 9.0 3.0 .0 .0 6.4 9 4.6 4.6 4.6 4.6 4.( 4.6 5.5 8.5 8.5 8.5 8.5 8.5 8.5 .0 4.6 4.6 4.6 4.6 4.( 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6 .0 .0 .0 .0 .0 .0 .0 .0 .0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 4.5 4.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 8 SANTA AKA RIVER BASIN. 279 Monthly discharge o/Greenspot inpe line near Mentone, Calif., for 1897-1901, 1903-1904, and 1911-1918. Discharge in second- Maxi- mum. Mini- mum. Run-oflE (total in acre- feet) . Discharge in second- feet. Maxi- Mini- mum, mum. 1897. August September . . . 1897-98. October 1-21.. April May June July August September... October November December January 1-9 . . February March April May June July August September... 1899-1900. October November December January February Ivlarch April May June July 1-15 August September... 1900-1901. October November December June July August September . . . 1901. October November December 1903. April May June July August September The period . 1903-4. October November December January February March April May June July August September 9.0 10.7 9.0 6.5 3.8 5.7 4.8 3.7 5.1 5.4 8.0 7.3 21.5 15.8 13.2 17.0 17.2 13.2 9.1 9.1 8.2 9.0 10 10.7 11 11.6 12.2 11.8 11.2 5.4 8.6 9.5 2.1 2.5 1.5 2.3 1.9 .4 1.1 1.5 2.3 2.7 5.5 5.7 1.7 1.2 4.24 6.43 2.6 .0 .0 1.3 5.1 3.0 .0 .3 3.44 5.75 4.62 3.81 4.36 550 1,010 1.060 786 560 560 553 595 658 196 644 750 702 689 300 312 312 244 406 512 584 129 139 92 137 117 24 33 166 327 350 101 74 261 383 2.21 131 2.13 131 2.97 183 3. 10 178 2.37 146 3.12 186 212 342 284 234 259 1904. October November. . December.. The period . 1911. September 7-30. 1911-12. October November December January February March April May June July August September The year. .. 1912-13. October Novem])er December January February March April May Jime July August September The year. 1913-14. October November December January February March April May June July August September. . . 1914-15. October November. . . December... January February March April May June July August Septemberr. . The year. The year. 1915-16. October November December January February March. 8.4 1.9 2.4 7.5 7.3 6.0 5.0 5.0 5.0 1.0 5.5 4.0 6.0 5.5 5.5 3.5 2.5 4 2.5 8.5 6.5 4.5 2.9 2.5 2.5 6.0 6.0 7.0 7.0 7.0 7.6 6.5 6.0 6.0 6.0 4.0 2.0 2.0 4.5 7.0 6.0 6.0 7.0 7.0 8.5 .0 .0 .0 .0 2.5 .0 .0 1.0 3.5 2.0 1.0 2.5 2.0 2.5 .8 .0 1.4 2.5 2.5 .5 1.5 .0 1.5 1 .5 1.2 1.5 .0 1.0 4.0 3.2 3.6 5.5 5.0 4.0 3.0 3.0 3.0 2.0 .0 2.0 1.0 4.0 5.0 6.0 6.0 5.3 5.0 280 SURFACE V/ATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Monthly discharge of Greenspot pipe line near Mentone, Calif., for 1897-1901, 1903-1904 ^ and 1911-1918— QojitinuQdL. 1915-16. April May. June July August. September. . The year . 1916-17. October November December January February March April May June July Discharge in second- feet. , mum. mum. 8.7 5.5 4.5 4.5 6.6 8.6 8.5 S.5 9.0 8.5 8.6 8.5 1.3 5.5 2.0 2.0 3.0 4.5 2.1 8.5 .0 8.5 3.83 8.03 8.50 8.50 8.50 8.50 5.13 8.27 5.05 2.87 4.12 4.63 7.73 8.50 8.22 8.53 Run-ofl (total in acre- feet). 494 506 523 523 506 285 492 311 176 229 285 460 523 1916-17. August September.. The year. 1917-18. October November December January February March April May June July August September... The year Discharge in second- feet. mum. mum. 9.0 9.0 .0 .0 2.5 9.00 9.00 9.0 9.0 8.06 8.72 5.48 2.11 6.90 9.0 9.0 9.0 9.0 9.0 .0| Run-off (totalin ,acre- feet). 553 536 653 536 130 411 553 536 553 563 536 MILL CHEEK III CAITYOIT AT HSADWORKS OF CRAFTON CAHAL, CALIF. Mill Creek is one of the larger tributaries of Santa Ana River. It rises on the western slope of the San Bernardino Mountains, draining the area immediately south of the headwaters of Santa Ana River. Mill Creek appears from its canyon about 5 miles east of Redlandis. The Crafton Water Co. diverts practically all the water of this creek at the mouth of the canyon. The water passes over a weir, and the volume was therefore determined v/ith considerable accuracy. The records have been furnished by Mr. Herbert Garstine, president of the Crafton Water Co. They are particularly accurate for low-water measurements. Discharge measurements of Mill CreeJc at headworJcs of Crafton canal, Calif., for 1896-1905. July 29 1898. Apr. 12 29 June 12 July 23 Sept. 8 Oct. 18 Nov. 9 Dec. 8 1899.- Jan. 12 Feb. 18 Mar. 23 May 6 31 June 15 July 15 27 Aug. 24 1900. Apr. 14 May 5 July 13 Oct. 2 Made by— J. H. Quinton.. J. B. Lippincott.. .do. .do. .do. .do. F. H. 01m.sted., ....do ....do S.G.Bennett.. do do ..do.. ..do.. ..do.. ..do.. ..do., ..do.. S.G.Bennett do do W. W. Cockins, jr.. Dis- charge. Sec. -feet. 14.2 15.7 18.9 18.1 11.8 13.1 15.3 15.2 12.6 10.8 10.4 15.6 7.4 4.3 7.2 10.8 47 1901. Mar. 30 July 6 Dec. 5 1902. Apr. 5 May 31 July 10 Sept. 3 Nov. 5 Apr. 1 24 May 16 Jxme 9 July 1 Sept. 1 1904. Sept. 21 Nov. 11 1905. Sept. 23 Made by- . G, Bennett.. ...do ...do S.G.Bennett.. do do W. B. Clapp.. S. G.Bennett.. W.B. Clapp Clapp and Clausen.. W. B.Clanp.... do do do W. B. Clapp.. E.G. LaRue.. Dis- charge. c.-feet, 20 23.3 14.5 21 19.2 10.8 5.3 12.3 1,280 39 29 22 15.2 14.1 Note. — Measurements include the total flow at this point. SANTA ANA RtVER BASIN. 281 Daily in second-feet, of Mill Creeh in canyon at hcadivorJcs of Crafcon canal, Calif., for 1897-1902. Day. July. Aug. Sept. Day. July, Aug. Sept, Day. July. Aug. 9A 22 21 21 22 21 28 22 21 27 20 27 20 24 20 24 20 Sept. 7. 8., 9. 10.. 1897. 21 22 23 24 25 26 27 28 , 29 30 31 20 27 19 19 18 18 19 19 Day. Apr. May. July. Aug. Sept. 21.. 22.. 23.. 27.. 28.. 29-. 17 I 17 I 17 17 16 17 17 s Not entire flow of creek. 282 SUKFACE WATER OF PACIFIC SLOPE, SOUTHERIT CALIFORNIA. Daily discharge, in second-feet, of Mill Creek in canyon at Jteadworks of Crafton canalj Calif. , for 1897-1902— Contmued. Day. Oct. Nov. Dee. Jan. Feb. Mar. Apr. May. JUBO. July. Aug. Sept. 1898-99. 1 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 8 9 8 9 9 9 10 10 4.8 5.3 .5.3 4.3 4.6 6.3 5.6 4.8 5.6 5.2 5.7 6.1 6.2 8.5 7.8 7.8 7.8 7.2 7.8 7.2 7.2 7.2 7.8 6.6 6.6 7.8 7.2 7.2 7.2 7.2 7.2 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 7.2 7.2 6.8 6.8 7.2 7.2 7.2 7.2 6.1 6.1 6.8 6.8 6.4 11.2 11.2 9.8 9.8 9.8 9.8 9.7 9.7 9.6 9.7 9.8 10.4 10.0 9.8 9.8 9.8 9.8 10 10 10 10 10 10 10 10 10 11 11 11 11 11 12 11 12 11 11 11 11 11 10 10 11 11 10 11 11 11 11 9.8 9.5 9.4 8.8 8.0 7.8 8.0 5.3 9.0 8.8 9.0 8.2 9.8 9.6 9.6 7.8 14.6 13.0 12.6 9.8 9.4 11.0 9.6 9.8 9.8 10.0 10.0 8.5 9.4 9.8 10.0 11 11 11 11 11 12 11 10 11 11 11 11 11 11 11 11 11 12 12 12 12 11 11 W 11 11 11 11 10 10 10 10 10 10 13 13 11 15 14 12 12 16 16 16 12 12 16 16 14 9.8 9.8 9.8 11.9 10.2 10.2 10.2 10.2 10.2 9.8 9.8 9.6 9.6 9.8 9.8 9.8 9.8 9.8 9.8 9.8 10.2 10.2 13.2 10.6 9.8 10.2 10,2 11.6 10.2 9.8 9.8 13 13 12 12 12 11 12 12 12 12 12 11 11 11 11 12 12 13 12 11 11 12 11 12 12 12 12 12 12 12 9.0 9.1 10.0 9.8 9.2 9.3 9.8 9.8 9.7 8.9 8.9 9.3 9.3 8.9 8.9 9.8 8^9 8.9 8.9 8.9 10.2 13.3 10.8 10.8 10.2 10.2 10.2 10.8 13.0 3.0 12 11 11 11 11 11 12 12 12 12 12 12 12 11 12 12 12 11 11 11 11 11 11 10 10 10 11 10 11 11 11 13.0 13.0 12.1 12.1 "is.'s' 14.6 16.4 17.0 12.0 12.0 12.0 13.0 12.0 12.0 10.1 12.0 10.1 10.1 9.9 9.9 8.4 8.6 8.6 8.2 17 13 12 11 10 11 10 10 10 8 8 8 8 7 7 8 9 8 8 8 8 8 7 7 8 8 6 4 8.2 8.2 7.6 7.8 8.0 8.0 8.0 8.0 8.0 8.0 8.0 8.0 8.2 8.0 8.0 8.2 7.2 4.8 6.8 7.6 7.6 6.5 6.5 ""5.'4' 5.4 5.3 5.6 6.2 6.2 6.2 4.9 6.7 6.7 6.7 6.7 6.2 6.2 6.2 4.8 4.8 5.1 7.2 6.3 4.9 6.2 4.9 5.1 5.8 6.2 6.5 5.4 5.4 4.8 4.8 5.5 5.5 5.5 5.5 5.5 5.6 5.6 6.3 6.3 5.1 4.3 4.3 4.5 4.5 5.5 5.5 5.5 5.5 4.5 3.8 3.3 4.4 4.0 5.4 5.4 4.8 5.0 5.0 5.0 5.0 5.0 5.0 4.7 4.7 7.1 6.2 5.8 6.7 7.2 6.9 6.7 6.2 6.2 6.2 6.2 6.2 5.6 5.3 6.2 5.6 5.3 6.0 6.0 5.3 S'.9 5.9 5.3 5.2 5.3 5.3 5.8 4.3 4.3 5.3 2.9 4.9 4.9 5.1 5.7 5.7 5.5 5.5 5.5 5.1 5.1 5.4 5.5 5.5 6.5 5.5 5.5 5.5 6.5 5.5 5.5 5.5 5.5 4.9 5.5 4.9 4.9 4.3 4.3 4.3 5.1 5.1 5.5 2 5.6 3 5.4 4 5.4 5 5.5 6 5.6 7 5.6 8 5.3 9 5.7 10 5.3 11 5.3 12 4.9 13 4.9 14 12 12 12 4.9 15 . 5.2 16 4.8 17 . .. . 3.2 18 12 12 12 3.0 19 3.0 20 2.8 21 - ... 2.8 22 11 11 13 11 12 12 11 2.8 23 2.8 24 . . 2.8 25 2.8 26 2.8 27 2.9 28 2.0 29 2 7 30 2.8 31 1899-1900. 1 9.8 10.0 10.2 10.6 10.0 10.2 10.6 10.6 10.6 10.2 ..10.6 5.1 2 5.6 3 5.5 4.... 5.7 5 : 5 5 6 5.5 7 5 8 5.0 9 5.0 10 ■"9."8' 10.0 10.0 10.6 10.4 10.6 10.6 10.6 10.4 10.4 10.4 10.4 10.6 10.2 10.2 10.2 10.2 10.0 10.0 10.0 10.0 10.0 10.0 10.2 10 2 10.2 10.2 10.2 10.2 10.2 10.2 9.8 9.8 5.5 11 5.5 12 5.5 13 5.5 14 5.5 15 4.5 16 4.5 17 4.3 18 5.1 19 4.5 20 4.1 21 5 1 22 ... 5 1 23 4.9 24 5 3 25 5.3 26 5.3 27 4 9 28 4,9 29 4.9 30 4 9 31 SAiSTTA AISTA RIVER BASIK. 28^ Daily discharge, in second-feel, of Mill Creek in canyon at headicorJcs of Crafto7i canal. Calif., for 1897-1902— GoJitiniied. Day. 1900-1901 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 June. ! Jiil^" I 19.00 19. 12 19.00 19.00 18.00 16.96 16.96 16.80 16.80 16.00 16.00 16.00 18.00 15. 04 15.04 Aug. ! Sept. 50.00 30.00 20.00 20.00 20.00 19.10 19.10 18.00 16.08 16.08 16.08 18. 24. 16.98 16.96 16.96 16.00 16.00 16.00 16.58 16.58 16.58 16.58 16.00 16. 60 14.04 14.00 14.00 14. 00 14.00 13.18 1900-1901, 16 17 18 19 20, 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. i 20.08 20.08 21.00 20. 90 20. 40 20.08 20.08 20.00 19.80 19.80 19. 50 19. 40 15. 04 15. 04 15. 04 14. 40 13. 94 14.40 14. 40 13. 94 13. 94 14.40 14.40 16.96 15.04 15. 04 15. 04 15.04 Aug. 16.00 16.00 15.04 15.04 15. 04 16.00 16.00 16.00 Sept. 13.18 13.18 12.30 12.30 12.30 11.42 11.42 12.30 12.30 14.58 13. 18 13.18 13.18 13. 18 13.18 'Day. 9.. 10.. 13.18 13. 18 13. 18 13. 18 13.18 13.18 13. 18 13. 18 12.80 12.64 12.30 12.30 12.30 12.80 12.30 12. 30 12.30 12. 30 12.30 12. 30 11.70 10.26 11.10 12.28 12.28 12.10 12.10 12.10 12. 10 12.10 Da J'. 1901 11 12 13 14 15 16..... 17 IS 19 20 12. &4 12.64 12.30 12.30 12. 30 12.30 12.30 12.30 12.30 12.30 12.30 12. 30 12.30 12. 30 12. 30 12.30 12 30 12.30 12. .30 12.30 12. 10 12.10 12.10 12.10 12. 10 12.10 12.10 12. 10 12.10 12.10 1901 21 22 23 24 35 26 26 28 29 30 31 12.30 12. 30 12. 30 12.30 12. 30 12.30 12. 30 12. 30 12. 30 12. 30 12.30 12. 30 12.30 12. .30 12. 30 12.30 12.30 12. -30 12.30 12. 30 11. GO 12.10 12.10 12.10 12.10 12,10 12.10 12. 10 12.10 12. 10 12.10 12.10 24.. 25.. 26.. 27-. 28.. 29.. 30.. 31^.. Day. 1902. 1.. . . 12.14 2 12. 14 3 12.14 4. 12.14 5- 12.14 6. 12.14 7. . 12.14 8. 12.. 14 9 12. 14 10. 12.7 11.. 12.74 12. 12.78 is:::: : : : : 12.74 14. 12. 74 16. 12. 74 10. 12 74 17. 12 74 18.. 12. 74 19". 12.74 20. 12 74 21 12.71 22 23;:::::::::::::::::;; ::: Jan. Feb. May. June. July. Aug. 11.42 11.42 11.42 11.42 12.3 12.3 21.02 22.0 22.0 22.0 22.0 24.6 24.6 24.6 24.26 24.26 24.26 24.0 24.0 20.6 23. 18 23.18 23.18 21.02 21. 02 21.02 21.02 19. 48 19.48 18. 96 18.96 20.0 20.0 19.48 19.48 17.78 17.92 16. 48 17.54 17.54 15. 52 14. .56 15. 52 15. 52 15.04 15.04 14.14 14.14 14.14 14.14 14.4 13.60 13.60 13.60 13.60 13.60 14.14 14.14 14.14 14. 14 13. 60 9.36 13.60 9.36 1.3.60 9.36 13. 60 9.36 13.60 9.36 13.60 9.36 13. 60 9.36 13. 18 9.36 13,18 9.76 12.30 9.76 12; 30 9.36 12.30 9.36 12; 30 9.36 11.86 9.36 11.86 9.36 11. 86 9.36 10.80 7.96 11.0 9.36 11.0 9.36 10. 38 9.36 9.96 9.36 10: 39 6.80 10. 16 8.80 10.16 8.80 11.86 8.80 10.8 8. SO 10: 16 8.80 10.16 8. SO 10: 58 8.80 10; 16 8.80 9.48 8.80 8.96 8.96 8.96 8.96 9.76 10.40 10. 40 9.82 10. 40 10. 58 10. 58 10. 58 10.0 9.0 9.0 8.0 8.0 8.16 8.16 8.16 8.80 8.16 8.16 8,96 8.96 8.16 8.16 8.16 8. 16 8.96 8.96 8.98 8.96 8.96 8.96 9.76 9.76 14.14 11.86 11.86 11.42 11.22 11.22 11.22 11.22 16.80 13.18 11.42 12.74 12. 74 16.0 16.0 16.0 16.0 16.0 16.0 14,4 13.8 13.8 13.8 12.74 12.74 12.74 a. On Aug. 16 a cloudburst iu Mill Creek canyon and Crafton Hills filled zanja and supply canal with sand. Note.— No record Jan. 22 to Feb. 17 and Feb. 24-28, 1902, Nov. 24-25, 1903, and after Dec. 10, 1903. 284 SUEFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA, Daily discharge, in second-feet, of loater pumped from Mill Creeh at Crafton headvjorJcs, Calif, for 1900. Day. 7.. 8.. 9.. 10.. 11.. 12.. 13.. 16.. 17.. 18-. 19.. 20.. 21.. 22.. 23.. 24.. 25.. 29.. 30.. 31.. Mar. Apr. May. June. July. Aug. Sept. Oct. Nov. 1.0 1.5 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 2.0 2.0 2.0 2.0 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2 2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2 2 2.2 2.2 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.7 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.3 3.5 3.5 3.5 3.5 3.3 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.3 3.3 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.8 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.2 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.9 2.9 2.9 2.9 2.9 2.9 2.9 Note. — No record from Nov. 17 to Doc. 31. Monthly discharge of Mill Creeh canals in canyon at Crafton headwords, Calif. , for 1895-96 and 1899-1902. [Drainage area, 47 square miles.] • Month. Discharge in ? econd-feet Run-off. Maximum. Minimum. Mean. Per square mile. Depth in inches on drainage area. _ Total in acre-feet. Aueu.st 1895. 27.6 26.5 24.5 21.4 16 16 13.2 15 13.1 24.0 19.5 17.0 9.4 5.1 6.1 8.7 7.4 9.0 24.5 20.0 19.6 13.4 10.3 11.5 11.6 11.5 10.5 0.52 .47 .42 .28 .22 .24 .25 .24 .22 0.60 .52 .48 .33 .25 .28 .28 . 27 .26 1 505 fceptember 1,310 October 1895-96. 1,205 May... 825 June. . 615 July 709 August 716 September. . 687 October. 1896. 637 1899. February . . 13 16 13 12 17 7.2 7.2 11 10 11 10 4.8 2.9 2.0 n.6 12.2 11.8 11.2 8.7 5.8 5.8 4.1 .25 .26 .25 .23 .19 .12 .12 .09 .26 .30 .28 .26 .21 .14 .14 .10 644 March... 750 April 702 May 689 Jime. 518 July 357 August 357 September 244 ^riod Thep 4,260 — SA:^TA ANxl EIVER BASIl^. 285 Monthly discharge of Mill Creek canals in canyon at Crafton headworhs, Calif., for 1895-96 and 1899-1902— QontmuQd. Discharge in second-feet. Eun-off, Month. Maximum, Minimum. Mean. Per square mile. Depth in inches on drainage area. Total in acre-feet. 1899-1900. October 8.5 11.2 14.6 10.6 10.6 13.2 13,3 17.0 8.2 6.3 5.7 5.7 4.3 6.1 5.3 9.8 9.8 9,6 8,9 8.2 6.3 3.3 4.3 4.3 6,5 8.6 9.5 10 10 10 10 12 7 5 5 5 0.14 .18 .20 .22 .22 .22 .22 .27 .16 .11 .11 .11 0.16 ,20. ,23 .13 ,23 .25 .25 .31 .18 .13 .13 .12 400 November 612 December 584 817 February 555 March 615 April 595 May 738 June 417 July 307 August. ... 307 September 298 The period 17.0 3.3 8,22 .175 2.32 5,640 1900-1901. October 5.8 8.5 19.12 3.8 . 5,1 13. 94 5 15.86 19.07 14.04 12.58 12.28 12.00 .11 .11 .34 .41 .30 ,27 ,26 ,26 .13 .07 .39 .35 .33 .31 .29 .30 307 November 1-17 169 July 975 867 September 16,58 13.18 12. 30 12.28 11.42 12.30 11.60 10.26 833 1901. October. . 774 November 732 December. 738 1902. January 1-21 . . 12.78 12.3 24.6 19.48 13.60 9.76 10.58 12.14 11.42 18,98 13,60 9.48 6.8 8.0 12.5 11.7 22.0 15.6 11.7 9,10 9.61 521 FebiTiary 18-23.. 139 May&-31 1,180 June. . 928 July 719 August 560 September 1-7, 9-30 553 1902-3. October 9.76 16.80 16.0 8.16 9,36 12.74 8.62 12,2 13.6 ■ 530 November 1-23, 26-30 678 December 1-10 .... 270 a Partial month. MILL CREEK AT FOREST HOME.i CALIF. Location.— In NW. \ NE. \ sec. 13, T. 1 S., R. 1 W., a! Forest Home, San Bernardino County, 2\ miles below Falls Creek, 4 miles above Mountain Home Creek, and 14 miles east of Redlands. Drainage AREA, — Not measured. Elevation. — About 4,900 feet above sea level. Records available. — September 22, 1903, to September 30, 1918. Discharge. — Obtained by combining results of current-meter measurements in power canal with flow over diverting dam. The flow over the diverting dam is only roughly determined. Extremes op discharge. — 1903-1918: Maximum mean daily discharge reported, 2,200 second-feet March 7, 1918 (no record for flood of January, 1916); minimum mean daily discharge reported, 7.0 second-feet November 19 and 20, 1904. Diversions. — None. Regulation. — None. Accuracy. — Daily discharge is mean of two observations recorded each day at 6 a. m, and 6 p. m. Records good for periods in which total flow of creek is diverted into power canal; subject to error for higher stages. Cooperation. — Record furnished by Southern California Edison Co., through H. W. Dennis, constructing engineer. 1 " Akers Camp" on San Gorgonio topographic map, U. S. Geological Sm-vey. 286 SURFACE WATER OE FACIFiC SLOFE^ SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Mil Qreeh at Forest Home^ Cdlif.^fw^ 190$-1M8. Day. Sept. Mar. Apr. May. June. July. Aug. 11 14 17 15 11 11 10 14 17 14 11 11 10 (a) 16 14 11 11 9.8 18 16 14 11 12 9.5 18 16 14 11 11 9.fi 21 16 14 10 (&) 9.5 20 16 14 TO 11 9.5 21 16 14 10 10 9.4 20 16 13 10 10 11 20 16 13 10 10 11 20 16 13 ID 10 10 20 16 13 9.9 11 10 20 16 13 9.9 11 1] 20 16 13 9.8 11 11 18 16 13 9.7 11 11 17 16 12 9.7 12 10 16 15 12 9.6 10 10 16 15 12 9.6 10 10 18 15 14 9.5 10 26 18 15 11 9.4 10 11 IS 15 12 9.4 10 11 17 15 12 9.4 11 50 26 15 12 9.3 10 13 16 16 12 9.0 10 12 17 16 12 10 11 15 17 16 12 12 11 17 17 15 11 12 11 18 16 15 11 11 10 48 15 15 11 11 10 19 16 15 11 11 10 14 15 11 9.8 Sept. 1... 2... 3... 9.. 10 . . 12., 13 . . 14., 15., 21. 22. 23. 24. 25. 26. 27. 28. 29. 30, 31- 10 9.2 9.0 9.6 9.7 8.7 8.7 8.7 8.7 8.7 8.6 8.5 8.4 Apr. May. July. Sept. 11.. 12.. 13.. 22.. 23.. 24.. 25.. 8.3 8.2 8.2 8.4 8.3 S.2 8.2 8.3 8.3 8.2 8.2 8.1 8.1 (a) 8.0 8.0 8.0 7.0 7.0 8.0 7.9 7.9 7.8 7.7 7.6 7.6 7.6 7.6 7.6 7.5 7.5 7.5 7.5 7.5 7.5 7.6 7.5 7.5 7.5 7.5 7.4 7.4 8.0 8.0 8.1 &1 8.2 12 66 26 30 27 23 22 23 26 23 23 24 24 24 41 50 (6) 74 73 74 20 19^ 19 19 19 18 19 18 19 19 18 18 18 17 18 17 17 18 14 17 17 17 18 17 i No record reported. b Discharge over 100 second-feet at time of one daily observation. SAHTA. AISA RIYER BASiH. 287 Dai^ discharge, in seeond-feet, of Mill Creek at Forest Home^ Calif, y for 1903-1918— ■ May. July. Aug. 23 23 23 23 23 {^) (6) (&) 23 22 22 22 22 17 17 17 24 23 26 22 20 20 60 36 32 fa) (a) 37 50 45 38 30 30 30 30 30 («) C«) (a) 60 60 50 50 50 50 50 55 60 60 65 70 70 70 70 70 70 70 70 70 45 .45 40 40 80 80 80 80 70 65 70 69 70 70 70 70 70 70 65 58 52 50 50 50 50 45 50 50 50 50 50 50 45 35 45 37 35 (a) 34 65 32 55 a Discharge over WO seeond-feet at time of one da% observaition. & No record reported. 288 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. discharge, in second-feet, of . ill Creek at Forest Home, Calif, for 1903-1918- Continued. Day. Oct. Nov. Dee. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1907-8. 1 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 23 45 22 22 22 22 22 22 22 22 12 12 12 12 13 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 13 17 20 18 13 19 14 12 12 12 12 22 22 22 21 21 21 22 21 21 21 20 20 20 20 20 20 20 19 19 19 19 19 19 19 18 18 18 18 18 18 12 12 12 12 12 12 12 ^ 12 12 12 11 11 11 11 11 12 11 11 11 11 11 11 16 11 11 11 11 11 11 11 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 17 17 17 17 17 17 17 11 12 15 13 12 12 12 11 11 11 11 11 11 11 11 11 11 11 11 11 12 12 12 12 12 12 12 12 12 12 12 17 17 17 17 17 16 16 16 16 16 15 14 14 16 15 15 14 14 14 24 14 14 18 20 18 17 15 16 16 16 16 12 12 11 11 11 11 11 11 20 11 12 14 38 45 17 13 12 12 12 12 (a) '""45' 12 14 14 14 14 14 14 15 15 16 19 18 16 16 15 15 15 15 15 15 15 16 16 17 16 17 16 16 16 16 16 16 14 20 22 22 21 15 16 18 18 17 18 25 18 29 18 24 25 22 22 20 21 24 24 24 24 24 24 24 24 24 24 24 24 20 18 17 16 17 29 16 16 17 19 20 21 22 26 26 29 32 32 32 32 32 32 32 32 32 32 31 32 32 32 32 23 24 24 24 23 27 1 28 28 28 28 28 28 28 28 28 28 28 28 28 28 ' 28 28 28 28 28 28 28 28 28 32 32 32 32 32 32 32 32 32 32 32 33 34 34 34 34 34 34 36 34 34 34 34 37 40 40 40 40 40 40 29 30 43 32 30 29 28 28 29 29 31 32 32 35 36 36 36 36 36 36 36 36 36 36 38 39 40 40 40 42 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 42 45 48 50 50 50 50 50 50 50 50 47 47 47 44 44 44 44 44 44 44 44 44 44 44 44 44 43 42 42 41 40 40 40 38 36 40 40 38 36 36 34 32 32 31 30 39 30 29 28 28 28 27 26 22 22 22 22 22 22 40 40 39 39 39 38 38 38 38 38 34 34 34 34 34 34 33 33 32 32 32 32 32 31 31 30 30 30 29 29 22 21 21 21 20 19 18 20 20 20 19 19 19 19 19 28 21 20 16 20 19 19 30 20 19 19 19 19 18 18 18 29 29 29 28 28 28 28 28 28 28 28 27 27 27 26 26 26 26 26 25 25 25 32 28 28 25 25 25 25 25 25 28 16 16 17 18 28 20 16 55 29 16 16 16 16 15 16 16 19 17 14 14 14 14 14 14 15 15 15 15 15 14 24 24 24 24 24 24 24 23 23 22 22 22 22 24 (a) 29 26 22 23 23 22 22 22 22 23 22 22 22 22 14 2 .... 14 3 16 4 . . 15 5 14 6 14 7 16 8 14 9 10 ^"'is 11 14 12 14 13 . .. 14 14 15 15 14 16 13 17 13 18 13 19 12 20 12 21 12 22 12 23 12 24 30 25 14 26 12 27 12 28 11 29 12 30 13 31 1908-9. 1 22 20 3 20 4 20 5 21 6 20 7 20 8 25 9 20 10 20 11 20 12 20 13 20 14 20 15 20 16 20 17 19 18 19 19 19 20 19 21 19 22 19 23 18 24 18 25 18 26 18 27 18 28 18 29 18 30 18 31 I Discharge over 100 second-feet at time of one daily observation. SANTA ANA BIVER BASIN. 289 Daily discharge, in second-feet, of Mill Creeh at Forest Home, Calif, for 1903-1918 — Continued. Day. Oct. Nov. Dec. Tan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1909-10. 1 19 19 18 14 18 18 18 18 18 18 18 17 17 17 17 17 18 18 17 17 17 17 17 17 16 16 16 16 16 16 16 22 22 22 22 22 22 22 22 22 22 23 23 23 26 27 27 28 24 23 22 23 23 22 22 22 22 22 22 22 22 22 16 16 16 16 16 16 16 16 18 16 16 16 16 17 10 18 17 10 16 16 16 10 16 16 16 18 18 16 16 16 22 22 25 24 23 23 22 23 22 22 22 22 23 25 25 25 23 23 23 23 22 22 22 22 22 23 23 22 22 22 16 16 15 15 15 24 16 17 ...... 24 16 16 16 10 16 15 15 15 15 15 16 16 16 16 16 16 16 16 18 (a) 22 22 22 22 21 21 21 21 21 21 21 21 21 21 21 21 22 21 22 23 23 22 22 22 21 21 21 21 21 21 20 50 54 56 56 53 54 54 54 54 55 55 52 54 53 62 46 46 46 48 48 48 49 50 50 50 50 50 20 19 20 20 20 20 20 20 25 31 22 21 20 48 27 23 22 20 20 20 20 20 29 37 27 25 27 50 50 51 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 52 53 52 52 52 52 52 52 52 70 54 46 75 55 50 50 40 42 43 45 46 44 48 45 45 45 43 42 41 42 40 % 42 42 45 48 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 SO 50 50 50 50 50 50 50 50 60 60 50 49 59 74 61 52 66 (o) 60 60 60 60 60 GO 60 60 60 56 56 60 60 57 54 53 53 53 53 53 54 55 56 56 56 56 56 56 56 60 60 59 58 59 60 CO 58 58 57 57 56 56 55 55 55 55 55 54 54 52 51 51 48 49 49 48 48 48 46 44 44 45 45 45 45 44 44 42 42 42 42 42 42 42 42 42 41 41 40 39 39 38 38 38 37 37 37 37 37 36 81 81 81 81 81 80 80 80 80 80 80 78 77 77 77 77 76 76 74 72 70 68 66 65 64 64 62 62 36 36 35 35 33 33 33 33 32 32 32 32 32 33 36 40 36 36 35 43 41 40 38 37 37 30 36 35 35 36 35 62 60 58 56 55 53 52 50 50 50 48 48 47 44 46 52 55 56 53 50 52 52 52 49 48 48 48 46 45 44 42 33 33 33 32 32 30 30 30 29 29 29 29 29 27 27 28 27 27 27 28 28 27 27 26 27 26 26 25 25 25 . 24 40 40 40 39 38 37 37 36 36 35 37 36 35 34 34 34 34 34 33 33 33 33 32 32 32 32 32 32 32 31 31 25 2 25 3 25 4.. 25 5 25 6 24 7 24 8 23 9 24 10 24 11 24 12 24 13 24 14 24 15 24 16 23 17 . 23 18 23 19 23 20 22 21 22 22 22 23 22 24 24 25 22 26 22 27 22 28 22 29 22 30 22 31 .. 1910-11. 1 30 2 30 3 . 29 4 30 6 ... 30 6 30 7 30 8 30 9 30 10 30 11 29 12 29 13 29 14 .... 29 15 30 16 28 17 28 18 1 27 19 27 20 27 21 27 22 27 23 26 24 26 25 26 26 97 95 92 90 88 86 26 27 27 28 32 29 37 30 80 (a) 45 31. a Discharge over 100 second-feet at time of one daily observation. Note.— For days on which no record is given, and not otherwise noted, the discharge was over 100 second- feet. 142131°— 21— wsp 447- -19 290 SURFACE WATER OE PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge^ in second-feet, of Mill Creek at Forest Home ^ Calif., for 1903-1918 — « Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. Juae. July. Aug. Sept. 1911-12. 1 37 35 34 34 33 33 32 32" 32 31 31 30 29 29 30 29 28 28 27 27 26 27 27 27 27 28 32 30 29 29 28 28 27 27 26 26 26 26 26 26 26 27 28 27 26 26 26 25 25 25 25 25 25 25 26 25 25 25 29 24 25 ...... 25 24 25 24 24 25 26 25 25 24 24 24 24 24 24 24 26 24 24 24 24 24 23 23 . 23 23 22 23 24 23 23 23 23 23 23 23 22 22 23 22 22 23 22 22 22 22 22 22 26 22 22 21 21 21 22 21 21 23 22 22 21 21 22 21 21 21 21 21 21 21 21 21 21 21 20 20 20 20 20 20 19 19 19 19 19 19 19 19 19 19 19 26 21 20 25 23 46 37 29 44 64 39 46 34 36 32 33 29 28 28 31 30 27 25 27 27 27 25 25 27 26 25 26 28 29 28 27 28 60 32 34 31 31 30 30 32 34 34 35 36 36 36 35 36 38 36 37 40 37 38 38 39 40 40 40 38 39 39 40 40 40 39 39 40 40 40 43 42 43 43 46 46 47 44 47 44 45 45 46 44 46 46 45 46 44 46 45 45 45 43 42 42 41 40 40 45 37 35 34 34 34 34 34 33 34 33 33 33 32 31 31 32 32 31 31 31 31 31 30 30 30 29 28 29 29 29 28 30 29 29 31 29 27 27 27 25 26 25 25 25 25 28 26 26 26 25 24 24 24 23 23 23 22 22 22 22 22 21 21 21 21 21 21 21 21 20 20 20 19 19 19 20 19 20 19 20 2 20 3 29 4 20 5 2a 6 20 7 20f 8 20 9 20 10. 19 11 18 12 18 13 18 14 18 15 18 16.. . 18 17 18 18 18 19.. 18 20 17 21 17 22 18 23 17 24. 17 25 16 26 16 27 16 28 16 29 IS 30 16 31 Note, — Discharge estimated Sept. 28-30. 11., 12.. 16.. 17.. 18.. 19.. 20.. 23.. 24., 25.. 16 19 18 16 16 18 28 29 21 15 12 29 19 18 16 16 19 29 28 21 14 12 38 20 18 18 16 19 26 30 20 .14 12 26 20 18 16 16 19 27 28 20 14 12 25 19 18 16 16 20 27 27 20 14 12 24 19 18 16 16 20 26 28 22 14 14 24 19 18 14 17 20 27 28 21 13 15 24 19 18 15 21 20 26 29 20 13 13 24 19 17 16 18 20 28 28 19 13 13 23 21 17 16 17 20 28 29 19 13 12 22 22 ■ 17 16 17 20 28 28 18 13 12 20 20 17 16 17 20 28 28 18 15 12 23 20 17 16 16 20 28 28 18 13 12 21 19 17 16 16 20 28 23 18 13 12 20 19 17 17 16 19 27 24 17 13 12 20 19 17 17 16 19 26 21 17 12 11 20 19 17 17 16 20 26 24 17 12 11 20 19 17 17 16 21 27 24 16 13 11 20 18 16 16 16 20 26 24 16 13 11 21 18 16 16 16 20 28 24 16 14 11 21 18 16 16 16 21 26 24 16 15 11 21 18 16 16 16 21 27 24 16 14 20 18 16 16 16 21 28 24 16 14 14 20 18 16 16 22 21 28 24 15 13 11 19 17 16 16 21 21 28 23 16 13 11 19 18 16 16 20 22 28 23 16 13 15 20 18 16 16 19 22 28 23 16 13 14 20 18 16 16 19 23 28 23 15 13 12 ■19 18 16 16 24 29 23 15 12 13 19 20 16 16 28 29 24 15 12 22 1 IS 16 16 29 22 12 13 Note.— Discharge is mean of two observations daily except for Jan. 18, 27, and July 21, 1913, when obser- vations were made only in the morning. A cloudburst Aug. 22, 1&13, piled debris on weir; no observations. SANTA ANA EIYER BASIS". 291 Daily discharge, in second-feet, of Mill Creelc at Forest Home, Calif, for 1903-1918- Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1913-14. 1 10 10 10 10 10 10 10 10 10 10 10 10 10 10 9.9 9.8 9.8 9.7 9.7 9.7 9.6 9.6 9.6 9.6 9.6 9.6 9.6 9.6 9.6 9.6 9.6 9.6 11 10 9.6 9.6 9.6 9.5 9.5 9.5 9.2 9.5 9.5 12 9.8 9.7 9.6 9.6 9.3 11 10 10 10 9.9 9.6 9.4 9.6 9.4 9.4 9.4 9.4 9.5 9.4 9.4 9.4 9.4 9.4 9.4 9.4 9.2 9.2 9.2 9.2 9.2 9.2 9.2 9.2 9.2 9.2 9.2 9.2 9.1 10 9.5 9.4 9.6 9.5 9.4 9.4 9.. 4 14 18 10.5 9.6 9.6 9.4 9.4 9.4 9.3 9.3 9.2 9.2 9.2 9.2 9.2 9.3 86 48 18.3 17.5 15.3 12.8 12.9 al2.6 12.1 13.1 21 34 24 21 19.6 21 21 22 22 22 22 22 21 21 21 21 21 21 22 23 23 23 23 23 26 36 368 152 50 49 48 47 46 46 46 46 48 50 50 50 52 55 55 55 55 55 55 55 55 55 55 55 55 52 50 50 50 50 50 48 45 45 45 45 45 44 45 45 45 45 46 46 45 45 45 45 46 48 48 48 49 52 52 52 52 52 52 50 50 50 50 «50 50 50 42 44 44 44 54 55 55 55 52 52 52 52 52 55 56 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 58 54 58 58 58 55 52 52 50 50 50 48 45 45 44 42 40 40 40 40 40 40 39 37 36 38 38 37 37 37 37 36 36 36 37 37 37 35 35 34 34 34 33 33 32 32 33 33 33 31 31 30 30 30 29 28 29 29 29 29 29 28 28 28 2S 28 27 28 27 27 27 27 27 27 26 26 26 26 26 26 26 25 25 25 25 24 24 23 22 22 22 22 22 22 22 2 22 3.. . 22 4 22 5 21 6 21 7 21 S 21 9 21 10 21 11, 20 12 20 13 20 14 20 15 20 16 19.6 17.. 19.5 18 19.4 19 19.0 20 18.8 21 . . 18.6 22 18.1 23 17.8 24 17.8 25 17.9 26 18.0 27 18.0 28 22 29 19.4 30 18.5 31 Note. — Daily discharge Dec. 16 interpolated by U. S. Geological Survey. 9.. 10.. .6.. 7.. 8.. .9.. 20.. 21.. 22.. 23.. 24.. 25.. 29.. 30.. 31.. 18.1 16.0 14.8 14.6 19.5 30 40 54 144 87 42 18.6 15.9 14.6 14.7 21 30 41 54 150 84 39 22 15.7 14.8 14.6 20 30 43 54 150 87 38 18.8 15.5 14.7 14.7 19.2 30 48 56 144 87 40 18.6 15.4 14.7 14.6 18.2 30 72 54 154 80 40 18.4 1.5.4 14.5 14.6 17.8 30 52 54 144 82 38 18.1 15.4 14.5 14.5 17.9 30 52 54 144 74 38 17. 8 15.4 14.6 14.3 17.9 30 50 54 124 72 38 17.5 16.0 14.4 14.3 34 30 50 57 124 70 38 17.4 19.5 14.4 14. 3 131 30 52 61 130 67 37 17.3 17,3 14.9 14.2 40 30 52 72 124 64 36 16.9 16.2 14.6 14.2 30 30 54 80 124 62 34 16.8 IG. 1 14.7 14.2 29 30 54 84 124 58 33 16.5 15.9 14, 7 14.2 26 30 54 87 109 55 36 16.5 15.8 14,6 14.4 2.S 31 56 90 104 54 33 i 16.5 15.8 14.5 13.5 30 32 50 86 113 54 32 16.4 15.7 21 13.6 32 32 54 108 104 52 32 16.3 15.5 17.6 13.9 32 33 54 129 102 52 31 16.2 15.4 15.6 13.8 31 33 54 84 106 52 30 16.3 15.4 15.0 13.8 31 36 54 84 91 51 30 17.1 15.3 14.7 14.1 30 36 56 94 102 50 29 17.0 15.3 16.2 15.1 30 37 56 104 102 50 29 16.6 19.0 15.4 14.8 30 48 54 99 97 84 29 16.2 15.1 15.1 15.1 30 39 54 99 89 54 29 16.2 14.9 14.8 17.3 30 40 56 109 92 50 29 15.8 15.0 14.9 14.7 30 40 56 114 92 50 30 16.0 15.0 14.8 14.4 30 40 56 124 87 54 30 15.8 14.8 14.8 17.7 30 40 57 124 84 55 29 15.8 14.9 14.6 33 40 60 152 90 48 29 19.0 14.9 14.5 17.1 40 56 144 87 45 28 16.3 14.5 18.2 40 144 44 28 Note. — Dec. 9 and 10, gage read in morning only; Felx 11,/in evening only ; Aug. 10 and 18, no record; discharge interpolated by the U. S. Geological Survey. a From mornittg readings only. 292 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Mill Creek at Forest Home, Calif., for 1903-1918 — ■ Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1915-16. 1 23 22 22 23 22 22 22 22 22 22 22 22 22 21 21 21 19.8 19.8 21 19.7 19.6 19.3 19.1 18.9 18.9 18.7 18.7 18.6 18.6 18.4 18.4 24 47 25 24 24 26 25 24 24 24 22 24 23 23 23 22 23 22 22 21 20 20 20 19 20 20 19 19 19 19 19 18.3 18.2 18.0 17.9 17.9 21 19.5 18.8 19.0 19.1 19.1 19.0 18.7 18.5 18.4 18.3 18.1 17.9 17.7 17.6 17.3 17.2 17.1 17.1 17.1 17.1 17.0 16.9 16.9 16.8 19 19 19 19 19 19 19 19 18 18 18 18 18 18 17 17 17 17 17 17 17 17 17 17 16 16 16 16 16 16 16.7 16.6 16.5 18.6 17.4 18.4 19.6 17.8 17.2 16.7 16.6 16.6 16.6 21 17.1 16.9 17.1 16.9 16.8 16.9 17.4 17.0 17.0 16.8 16.1 15.5 15.3 15.5 15.3 14.5 14.4 16 16 16 16 16 16 16 16 15 15 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 15 15 14 14 14 14 15.6 18.6 16.8 17.6 17.5 16.7 16.3 16.3 92 19.5 16.8 16.2 15.4 17 9 16.0 28 ""96"' 80 76 80 130 300 115 125 140 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 16 15 14 14 14 14 14 14 14 14 14 15 14 115 80 90 90 90 90 95 90 95 100 100 100 100 100 100 100 98 98 95 95 116 100 100 100 100 112 115 110 110 14 14 14 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 18 17 15 29 18 16 15 120 110 110 110 125 118 110 no no no 115 115 115 115 115 118 118 118 118 158 180 145 140 140 130 130 130 130 130 130 130 15 15 16 16 16 16 16 16 16 16 16 17 16 16 16 15 17 18 23 23 21 22 26 27 26 25 25 25 24 130 130 130 130 125 125 125 120 120 120 120 120 120 120 120 120 120 120 117 116 116 116 114 112 108 110 no 110 no 105 22 22 23 23 23 23 23 . 23 22 22 22 23 22 22 22 22 23 27 28 28 29 29 29 29 30 30 30 30 30 30 105 105 105 105 105 105 105 105 105 105 105 105 105 105 102 100 98 95 100 95 95 95 92 90 90 90 90 .90 88 85 85 30 34 30 30 29 29 29 30 30 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 28 28 28 28 28 28 28 82 80 78 72 72 72 72 72 70 68 68 62 48 42 42 42 42 42 40 40 40 37 37 38 38 38 34 38 48 38 28 28 27 28 27 27 28 28 27 27 27 27 27 26 26 26 26 25 25 25 25 25 24 ■ 24 23 24 23 23 24 23 37 35 34 34 34 32 32 32 32 31 30 30 32 30 30 31 30 30 30 30 29 29 28 29 29 28 28 28 28 28 28 22 22 21 21 21 21 21 20 20 20 19 19 19 19 18 17 17 17 17 16 17 19 18 18 17 29 112 26 22 22 21 27 27 27 26 26 26 26 26 26 26 26 26 26 26 26 25 24 23 24 24 24 23 23 23 32 31 30 28 28 26 25 20 20 24 20 18 18 18 18 18 18 19 18 19 18 18 17 17 17 17 17 17 17 17 16 16 16 16 16 16 15 15 26 26 28 2 3 4 25 5 24 6 24 7 24 8 23 9 23 10 23 11 22 12 23 13 22 14 22 15 21 16 21 17 .. . 23 18 23 19 . . .. 23 20 21 21 19.8 22 20 23 20 24 19.6 25 18.8 26 18.8 27 18.8 28 18.8 29 18.8 30 24 31 1916-17. 1 15 2 15 3 15 4 14 5 . ... 14 6 14 7 14 8 14 9 14 10 14 11 14 12 14 13 14 14 14 15 14 16 13 17 13 18 13 19 13 20 14 21 13 22 13 23 13 24 13 25 13 26 13 2? 13 28 13 29 13 30 13 31 SANTA ANA RIVEH BASIN. 293 Daily discharge, in second-feet, of Mill Creek at Forest Home, Calif., for 1903-1918- Continued. Day. Apr. May. Jtrne. July. Aug. Sept. 7.. 8.. 9.. 10.. 11.. 12.. 13.. 14.. 15.. 18.. 19.. 20.. 21.. 22.. 23.. 24.. 25.. 12.4 12.4 12.4 12.2 12.2 12.2 12,2 12.2 12.2 12.3 12.2 12.2 12.5 12.3 12.2 12.3 12.1 12.1 12.2 i: 29.. 30.. 31.. 11.3 11.2 11.0 11.0 11.0 11.0 10.8 10.8 10.8 10.8 10.8 10.8 10.8 10.8 10.8 10.8 10.8 10.8 10.8 10.6 10.4 10.4 10.3 10.4 10.3 10.4 10.3 10.2 10.2 10.1 10.0 10.0 10.0 10.0 10.0 9.9 10.0 9.6 9.6 9.6 7.5 9.3 9.6 9.8 9.4 9.1 11.3 9.1 9.1 10.5 10.2 9.2 9.6 9.6 9.6 9.5 9.4 9.4 9.3 9.2 9.2 9.1 9.8 9.2 9.0 9.1 9.1 9.1 9.1 9.1 9.1 9.1 9.0 8.0 8.4 9.7 10.7 27.0 10.4 10.3 10.2 10.5 10.5 10.7 10.7 10.7 32.5 2,200 70 13.3 755 320 ,750 120 110 75 60 50 45 37 37 37.5 37.5 37.5 37 37 37 37 37 37 37 39 40 39 39 a 3,9 40 39 38 38 38 38 37.5 37.5 37.5 37 37.7 37.5 37.2 36.5 38.5 36.5 36 5 35 38.5 35 35 34.5 34 34 34 34 34 34 32.5 o32 31.5 f'31.5 40 39 39 38 37 35 35.5 35 33.8 33.8 32 30 29.5 28.2 27 26.5 25.8 29.5 23.2 30.9 22.8 23.2 24.8 29.5 30 27 27.5 27.8 27.5 26.5 26.5 26.2 26 25.5 24.5 24 24 24 24 24 22.6 23.1 22.2 21.6 21.5 21.2 21.2 21.2 20.6 20.6 20.7 20.6 20.5 121 21.6 21.8 20.5 20.4 20.4 J 20. 3 20.2 20.1 20.1 19.8 19.4 18.9 18.3 18.1 18 17.6 17.9 18.2 18.6 18.5 25.9 22 17.8 17.0 15.7 15.9 22.3 15.9 16.2 15.9 16.0 16.1 15.8 15.8 16.1 15.7 15.7 15.6 15.4 15.5 15.5 15.2 14.2 15.5 15.9 15.2 15.6 15.6 15.2 15.6 15.4 15.6 15.2 a Interpolated. ^ Estimated same as day before. Monthly discharge of Mill Creek at Forest Home, Calif., for 1903-1918. Discharge in second- Maxi- Mini- mum, mum. Run-off (total in acre- feet). Discharge in second- \ feet. Maxi- Mini- Mean, mum. mum. 25 14 15.0 24 13 14.0 20 13 14.5 60 14 27.8 60 40 50.4 65 40 43.4 60 29 43.1 35 26 30.4 29 28 28.1 28 24 26.8 23 20 21.2 24 16 17.9 42 16 19.3 27 16 21.1 50 22 29.5 60 30 39.8 80 50 69. 80 45 62.8 54 38 43.5 38 30 33.5 30 30 30.0 48 22 27.0 45 22 22.8 22 18 19.8 18 17 17.8 24 14 16.1 22 14 16.6 32 16 26.1 40 32 34.6 Run-off (total in acre- feet). 1903. September 23-30. 1903-4. October November December January February March April 1-2,4^30... May June.. July August 1-5,7-31. September 1904-5. October November 1-14, 16-30 December January February 1-15, 17-28 March 1-11, 13-31, April May 1-14,18-31.. June July August September 1905-6. October November 19 12 50 26 15 12 9.5 8.2 31 78 54 17 21 12 11 10 9.0 11 9.0 7.0 7.4 7.4 18 20 36 39 . 24 19 14 14 15 1.3.7 842 11.4 678 10.5 646 9.50 584 9.76 561 14.4 885 18.1 1,040 15. 7 965 12.7 758 10.2 627 10.6 631 9.07 540 7.98 7.55 13.0 23.8 29.0 52.6 44.6 29.7 21.5 18.0 15.6 15.8 459 464 497 1,420 1,730 2,920 2,650 1,830 1,320 1,070 1905-6. December January February March 1-15, 18-23 28-31 April May 1-27,30-31.. June July August September 1906-7. October 1-5, 9-31 . November December 1-27, 29-31 January February March 1-19, 2.3-31. April 1-18,20-30. May 1-6,8-31.... Jime July August September 1907-8. October. November December January February March Anril 805 1,320 3,000 2,500 2,560 1,870 1,730 1,590 1, 180 1,070 1,150 1,300 1,640 2,210 3,970 3,740 2,590 2,060 1,840 1,610 1,400 1,180 1,090 990 955 1,600 2,060 294 SUEFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Monthly discharge of Mill Creek at Forest Home, Calif ., for 1903-1918 — Continued. 1907-8. May June July August September 1-8 10-30 19G8-9. October........ Noveniber December January 1-20, 23-31.... Tebmary March April May June July... August 1-14, 18-31 September 1909-10. October November December 1-8, ■ 10-30 January 4-31 Februarj' March April.... May June July August September : 1910-11. October November. December J-aiiuary 1-9, 11-28,30 February 1-22, 23-28 March 1-7...... April May 26-31 . . June 1,3-30 July i August September 1911-12. October November. December ...... January February....... March April May..... June July August September The year . 1912-13. October....... November December. . .. January February March April May..- Jime Discharge in second- feet. Maxi- Mini- mum, mum. 40.0 30.8 20.0 18.2 14.1 13.0 11.5 1L7 16.0 21.9 27.3 34.5 45.7 34.2 26.9 23.1 19.5 17.1 16.3 17.0 51.5 51.9 50.6 57.0 53.9 40.8 35.5 28.2 2.3.3 21.4 25.8 47.0 58.7 91.3 74.9 50.6 34.6 29.4 30.0 25.9 24.0 22.2 20.1 31.0 34.4 42.5 37.7 28.3 21.5 18.0 21.8 18.9 16.8 16.0 17. 1 20.9 27.4 25.5 17.7 Run-oS (total in acre- feet). 2,460 1,8.30 1,230 1,120 811 1,220 1,680 2,050 2,810 2,040 1, 650 1,280 1,160 1, 0,50 970 978 2,860 2,880 3,110 3,390 3,310 2,430 2,180 1,730 1,390 1,400 1,360 1,320 2,520 815 1,090 4,310 3, 110 2, 130 1,750 1,840 1,540 1,480 1, 360 1,160 1,910 2,050 2,610 2,240 1,740 1,320 1,070 20,300 1,340 1,120 1,030 984 950 1,290 1,630 1,570 1,050 1912-13. July September 1913-14. October November December January February March April May June July... August September The year . . 1914-15. October November. . . . . December . . . . . January ... February March April May. June July August September The year . 1915-18. October November December January February March April May June July.... August , , September 1916-17. October. November December January February March April May .Tune July August September. . . The year . . 1917-18. October November. December January , February March April May June July August September The year . Discharge in second- feet. Maxi- Mini- mum, mum. 58 37 28 22 19.5 21 33 131 48 72 152 154 87 42 29 23 21 116 180 130 105 82 9.6 9.2 22 17.8 15.8 14.8 14.4 13.5 17.8 30 40 54 84 44 28 22 13.5 18.4 16.8 14.4 110 105 85 47 19 27 30 28 112 12.8 15.0 11.3 11.3 27.0 2,200 25.9 22.3 2,200 11. 8 11.3 10.0 10.5 37 35 27 21.2 13.3 10.1 9.81 9.77 9.77 17.4 40.0 50.8 48.0 55.4 44.0 32.1 25.4 19.9 30.6 17.2 15.8 15.1 15. 4 30.9 34.1 53.2 89.1 114 63.2 33.4 20.6 18.0 16.9 124 119 26.0 22.0 22.8 17.5 14.6 14.1 15.7 19.0 25.4 29.1 25.8 22.8 17.6 13.6 19.9 10.2 200 38.8 37.9 34.1 25.3 20.0 15.9 35.9 Note.— All montloly tables computed by United States Geological Survey. SANTA AIvA RIVER BASHST. 295 HIGHLANDS CANAL AT IHTAKE WEIK, NEAR MEKTONE, CALIF. Highlands or North Fork canal diverts water from Santa Ana Eiver at the mouth of the canyon, opposite the Mentone Power Co.'s power house. Discharge measurements of Highlands canal at intake vjcir, near Mentone, Calif., for 1896-1904. Made by— Dis- charge. Date. Sec-feet, 1901. 8.50 July 6 Aug. 20 11.91 10.76 12.40 Oct. 8 Dec. 5 May 31 17.03 11. 37 13.29 9.85 8.12 6.95 1902. May 31 July 10 Sept. 3 Nov. 5 1903. 8.07 Apr. 24 11.78 May 16 7.70 Aug. 31 6.74 10.30 1904. 13.14 Jan. 29 11.92 May 14 4.28 28 June 29 7.48 (o) Sept. 21 Nov. 11 5.61 Made by- Dis- charge. 1896. Nov.. 21 1898. Jan. 8 Mar. 9 Apr. 12 29 June 12 Sept. 8 Oct. 18 Nov. 9 Dec. 8 1899. Feb. 18 Mar. 23 May 6 31 June 15 July 15 27 Aug. 24 1900. Apr. 14 July 13 Oct. 2 J. B. Lippincott J. B. Lippincott H. Crowe J. B. Lippincott do-..: do do F.H. Olmsted do do S. G. Bennett do do do do... do do.. , do , S, G, Bennett do. W. W. Coekins.jr-. . G. Bennett. ...do ...do ...do ...do S. G. Bennet.., do , W. B. Clapp.- S. G.Bennett. W. B. Clapp. do do W. B. Clapp.. do do do ..-.do E. C. .r,a Rue. . See. -feet. 13.28 15.79 14.30 8-53 7.90 7.90 11.50 11.10 10.02 6 18 15. G 10.7 11.4 12.0 13.5 16.4 7.8 n Water not going through weir basin; weir was being repaired. Dailif discharge, in second-feet, of Highlands canal at Sand Box weir, near Mentone, Calif., for 1901 and 1903-1904. Day. July. Aug. Sept. 1901. 1. . . 12.7 2 11.7 11.3 4. . 12. 1 1L4 6 11.5 7 12.2 8... 12. 3 9..-. . . 11. 1 10 11. 9 11 . . . 12.7 12 12. 7 13-. 12 14.. 12. 15 . - - . 10 16 11.3 17 11 1 18 11. 1 19 11. 1 20 14. 6 21 14 6 22 14.0 23 13, 9 24 14 ] 25 14. 4 26 13 9 27 14 9 28 ... . 14 29 14.3 30 14 1 31 14.7 14.2 12.5 12.0 12.6 13.9 13.8 14.6 14.7 15.3 15.3 14.7 15.4 12.9 12.8 12.3 14.6 15.3 14.2 14.2 15.0 14.6 14.4 15.1 14.4 14.2 14.6 13.6 13.0 12.4 14.1 15.8 14.4 14.5 14.5 15.4 14.6 1.5.3 15.4 16.0 19.4 'ii'o" 13.1 12.0 6.0 12.0 17.5 17.5 17.5 17.5 17.5 17.5 17.5 16.5 16.5 16.5 16.5 16.5 15.4 16.5 15.8 12.8 16.2 16.1 16.1 15.2 15.4 14.5 15.4 16.1 15.8 16.5 16.4 14.3 15.4 14.5 14.6 16.3 16.3 16.5 ia5 13.9 16.3 .16.3 15.9 14.4 14.4 14.3 14.1 13.8 14.3 14.5 14.1 14.3 14.3 13.4 12.1 14.3 13.1 13. 3 15.0 14.5 14.2 14.5 12.0 12.1 14.3 12.0 12.1 11.0 9.0 8.8 11.2 12.0 8.2 8.4 10.5 10.5 9.5 9.2 10.3 10.8 10.0 9.2 9.5 10.4 9.5 9.5 7.7 8.9 7,9 9.5 n.i 9.7 9.2 10.0 8.2 8.2 9.2 7,7 8.2 8.2 10.0 7.4 7.4 7.0 7.4 7.2 6.7 6.7 7.0 7.0 7.2 7.2 7.2 7.0 7.0 7.2 7.2 296 SUKFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. DoAly discharge, in second-feet, of Highlands canal at Sand Box weir, near Mentone, Calif ,forl901 and 1903-1904— Continued. Day. 1903. 1 2 3 4 5 7 8 9 10 11 12....... 13 14 15 May. June. July. Aug. Sept. 7.9 20.9 17.6 17.2 16.3 12.2 20.9 18.9 16.3 17.2 12.2 20.9 17.6 16.9 15.3 12.2 20.9 16.3 17.2 16.3 12.2 19.6 16.3 17.2 16.3 12.2 19.6 16.9 17.2 16.3 13.4 19.6 16.9 17.2 16.3 13.4 19.6 16.0 17.2 16.3 13.4 16.9 16.0 17.2 16.3 13.4 14.4 16.3 16.3 16.3 13.4 16.9 16.3 17.2 16.3 13.4 16.9 16.3 16.3 16.3 13.4 18.2 16.3 16.3 16.3 13.4 18.2 16.3 16.3 16.3 13.4 16.9 16.3 16.3 16.3 Day. May. June. July. Aug. Sept. 1903. 16 17 18 19 20 21 22 23 24 25 26 27 28....;.. 29 30 31 13.4 13.4 13.4 13.4 13.4 13.4 13.4 13.4 21.0 21.0 21.0 21.0 21.0 21.0 21.0 21.0 18.2 17.6 17.6 17.6 16.9 16.9 16.9 16.9 16.9 16.9 16.9 16.9 16.9 16.9 16.9 16.9 14.4 14.4 16.9 16.9 17.6 16.9 17.2 17.2 17.2 17.2 17.2 17.2 17.2 16.9 16.3 17,2 17.6 17.2 17.2 17.2 17.2 17.2 16.3 17.2 16.9 16.9 15.6 15.6 15.6 15.6 15.6 Day. Apr. May. July. Aug. 1903-4, 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17......... 18 19 20 21. 22... 23 24. 25 26 27 28 29 30 31.. 13.6 13.6 11.0 11.0 11.0 11.0 11.0 11.0 11.0 12.2 12.2 12.2 12.2 13.6 13.6 13,6 13.6 14.7 14.7 15.3 15.3 15.3 15.3 15.3 15.3 15.3 15.3 15.3 15.3 11.8 11.8 11.0 11.0 11.0 11.0 11.0 11.0 10.2 11.0 11.0 10.2 11.0 10.2 10.2 10.2 10.2 10.2 9.4 9.4 9.4 9.4 9.4 9.4 9.4 9.4 9.4 11.0 7.9 7.9 7.9 7 9 7.9 7.9 7.9 7.9 7.9 7.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 8.9 12.1 12.1 8.6 8.6 8.6 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 14.4 14.4 14.4 14.4 14.4 14.4 14.4 16.9 16.9 16.9 16.9 16.9 16.9 16.9 13.2 13.2 13.2 13.2 13.2 13.2 13.2 12.7 12.7 12.7 12.7 13.5 13.5 11.2 11.0 11.0 11.0 11.0 10.7 10.7 10,7 10.7 11.5 11.5 11.5 11.5 12.4 11.5 13.2 11.5 11.5 13.2 13.2 13.2 13.2 13.2 13.2 13.2 14.1 14.1 14.1 14.1 14.1 14,1 14,1 13.2 13.2 13.2 13.2 13.2 13.2 13.2 13.2 13.2 13.2 13.2 13,2 13.2 13.2 13.2 13.2 13.2 15.3 15.3 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 15.0 14,1 14.1 14.1 14.1 14,1 15.3 15.3 15.3 15.3 15.3 15.3 15.3 15.3 15.3 15.3 16.3 15.3 15.3 15.3 1.5.3 16.6 16.6 16.6 16.6 16,6 16.6 16.6 16.6 16.6 16.6 15.6 15.6 15.6 15.6 15.6 Day. Oct. Nov. Dec. j 1 16.0 8.4 8.4 14.1 8.4 6.0 14.1 8.4 6.0 14.1 8.4 6.2 14.1 8.4 6.2 14.1 8.4 6.2 14.1 8.4 6.2 13.5 8.4 6.2 14.1 8.4 6.2 14.1 8.4 6.0 Day. Day. Oct. Nov. 14.1 8.4 14.1 8.4 14.1 8.4 14.1 8.4 14.1 8.4 13.5 8.4 13.5 8.4 13.5 8.4 12.2 8.4 10.0 8.4 9.6 1904-5, 1 2. 3 4 5 6 7 8 9 10 1904-5. 11 12 13 14 15 16 17 18 19 13.8 13.8 13.5 13.5 13.5 14.1 14.1 14.1 14.1 14.1 6.0 6.0 6.0 6.2 6.4 5.5 1904-5. 21 22 23 24 25 26 27 28 29 30 31 6.0 6.0 5.8 6,0 6.0 6.0 6.0 6.0 5.8 5.8 5.8 SANTA AKA RIVER BASIN". 297 REDLAK^DS CANAL NEAR MENTONE CALIF. Redlands or South Fork canal diverts water from Santa Ana River at the mouth of the canyon opposite the Mentone Power Co.'s power house. Discharge measurements of Redlands or South Fork canal at Sand Box iveir, near Mentone, Calif., for 1896-1904. July 29 Nov. 21 1S98. Jan. 8 Mar. 9 Apr. 12 29 June 12 July 23 Sept. 8 Oct. 18 Nov. 9 Dec. 8 1899. Jan. 12 Feb. 18 Mar. 23 May 6 31 June 15 27 July 15 Aug. 24 1900. Apr. 14 Made by— > J. H. Quinton — J. B. Lippincott. J. B. Lippincott. H. Crowe ^ - - - J. B. Lippincott. do do do F. H. Olmsted. do..... ....do , . G. Bennett., ...do , ...do ...do ...do ...do ...do ...do , ...do Dis- charge. Sec-feet. 40.62 12.00 21,32 22.22 16.70 13.00 18.40 15.00 15.40 7.26 10.20 12.00 15. 10 15.70 17. 00 15.49 14.67 7.76 12.40 12.70 5.71 1900. July 13 Oct. 2 1901. Mar. 30 May 31 July 6 Aug. 20 Oct. 8 Dec. 5 1902. Mav 31 July 10 Sept. 3 Nov. 5 1903. Apr. 24 May 16 Aug. 31 1904. Jan. 29 May 14 28 June 29 Nov. 11 S. G. Bennett W. W. Cockins, jr.. . G. Bennett.. ...do ...do ...do ...do ...do S. G. Beimett.. do W. B. Clapp... S. G. Bcnnott.. W. B. Clapp. do ....do W. B. Clapp.. do do do E.C. La Rue. Sec-feet. 10.65 6.25 30.00 19.60 19.91 16.75 24.10 14.27 19.60 10.06 14.60 7.55 9.6 29.0 28.0 12.3 23.8 26.0 22.0 9.6 Daily discharge, in second-feet, of Redlands canal at Sand Box iveir, near Mentone, Calif, for 1901 and 1903-4. Day. 1901. 1 20.0 2 24.6 3 24.0 4 22.0 5 23.3 6 22.7 7 20.8 8 19.5 9 20.6 10 2L4 11 20.7 12 . 17 i 13 17.7 14 18.3 15 18.9 16 . ... 20 1 17 20.7 18 27.3 19 28.6 20 24.6 21 22.6 22 27.3 23. 28 6 24 26.6 25 23.3 26 23.3 27...* 22 6 23 20.7 29 18 3 30 18.9 31 June. July. Aug. Sept. Oct. Nov 22.7 18.9 18.9 20.7 23.7 22.8 20.7 18.9 18.3 19.5 20.7 19.5 18.9 18.9 19.5 19.5 19.5 18.3 21.4 22.6 22.6 23.3 24.6 23.9 20.7 20.7 21.4 20.7 18.9 22.6 24.6 23.9 3L4 23.3 22.0 27.9 25.2 20.7 22.0 17.1 18.9 14.8 25. 2 23.3 24.6 27.4 .0 .0 11.6 9.3 34.3 1L6 28.0 28.0 30.0 28.0 32.9 28.6 31.4 34.3 36.4 37.3 30,0 29.3 30.2 27.3 29.3 23.3 25.3 23.3 21.4 2.5.9 27.3 28.0 28.0 27.3 27.3 27.3 30.0 30.0 28.6 30.0 34.3 28.6 30.0 27.6 24,6 24.6 28.6 27.9 30.0 28.6 32.9 30.0 30.0 28.6 28.0 26.6 28.0 26.6 25.3 2L4 23.3 26.6 29.5 30,0 30.0 31.4 30.0 30.0 28.0 29.4 27.0 29.4 25.8 26.0 28.0 17.0 12.0 9.0 9.0 30.0 22.0 24.0 17.1 15.3 14.0 16.6 16.9 14.1 13.8 18.6 16.1 13.0 12.5 11.4 10.9 12.0 13.8 14.1 14.1 17.8 16.4 14.9 11.2 1L2 12.2 12.0 12.0 14.4 14.4 13.6 Dec. 14.9 14.9 14.4 13.8 13.8 12.0 16.4 16.4 15.2 14.7 15.2 16.6 16.4 12.8 14.1 15.8 15.8 15.2 14.1 14.1 14.9 14.9 16.4 16.6 16.4 15.8 15.8 15.2 14.9 13.8 13.8 298 SUEFACE WATER OE PACIFIC SLOPEj. SOUTHERN CALIFORE'lA. Daily discharge, in second-feet, of Redlmids canal at Sand Box iveir, near Mentone, Calif .^ for 1901 and 1903-4— Gontm\xed. Day. 12.. 13.. May. June. Jialy. Aug. Sept. 15.9 17.1 21.7 10.6 23.7 12.1 47.1 54.3 24.6 22.0 30.0 30.0 30.0 32.9 32.9 36.5 36.5 36.5 36.5 36.5 35.1 38.1 38.1 29.8 29.8 33.8 31.2 33.8 31.2 31.2 28.4 33.8 33.8 38.1 35.1 33.8 33.8 31.2 39.5 39.5 39.5 33.8 33.2 33.2 35.1 3.5.8 29.8 27.2 28.4 28.4 33.8 35.1 35.1 Day. 1903. 16 17 18 19 20 21 22 23 24.. 25 26 27 28 29 30 31 May. June. July. Xw'i.. Sept, 36.5 36.5 35.5 33.8 33.8 33.8 31.2 31.2 31.2 31.2 3.5.1 38.1 37.3 37.3 34.5 33.8 33.8 33.8 36.5 36.5 36.5 36.5 36.5 39.5 39.5 Day. Oct. Nov. Dec. 27.2 33.8 17.1 26. 6 20.4 17.7 14.4 15.4 17.7 22.8 18.2 17.7 21.0 14.4 17.7 19.8 14.4 17.7 22.3 16.6 17.7 24.4 16.6 17.7 27.2 18.7 17.7 25.4 17.7 18.2 24.8 17.1 16.6 24. 8 17.1 14.4 25. 4 17.1 15.4 27. 8 17.1 15.4 30.6 17.1 14.4 29.2 17.7 16.6 30. 6 17.7 16.6 31.9 18.2 15.4 27.8 18.2 15.4 30.6 18.2 15.4 28.4 18.2 15.4 29. 8 16.6 15.4 33.2 16.6 15.4 32. 5 16.6 16.6 32.5 16.6 16.6 3;i2 16,6 16.6 33. 8 16.6 16.6 33. 2 16.6 10.6 31.9 16.6 16.6 36.5 17.1 16.6 36.5 16,6 Mar. Apr. May. 18.7 14.4 31.2 23.5 14.4 31.2 22.3 16.6 31.2 21.0 16.6 31.2 17.1 18.7 28.4 17.1 18.7 26.0 18.7 18.7 26.0 18.7 18.7 26.0 18.7 21.0 26.0 17.7 18.7 26.0 14.4 18.7 21.0 10.3 23.5 21.0 17.7 23.5 18.7 17.7 23.5 23.5 18.2 23.5 23.5 17.7 23.5 23.5 16.6 23.5 23.5 14.4 23.5 26.0 16.6 23.5 26.0 14.4 16.6 26.0 18.7 18.7 27.2 18.7 26.0 27.2 .0 26.0 24.2 .0 28.4 24.8 .0 28.4 24.8 .0 31.2 29.8 12.3 31.2 27.8 14.4 31.2 27.2 6.7 31.2 26.0 14.4 31.2 24.8 14.4 24.8 Fuly. Aug. 24.2 25.4 24. 2 26.0 24.8 25.4 27.2 27.2 27.2 27.8 29.8 29.2 26. 28.4 22. 3 24.8 22. a 22. a 26.0 22.3 26.0 22.3 26.0 26.0 26.0 .0 27.8 14.4 26.9 14.4 29.2 23.5 29.8 27.2 29.8 26.0 27.8 27.2 25.4 26.6 24.8 35.5 24.8 33.8 24.8 26.0 21.6 26.0 18.7 24.8 24.8 27.2 25.4 sae 25. 4 26.0 19.8 24 8 21.6 26.6 2.3.5 29.8 17.. 18.. 19.. 20.. 21.. 22.. 23.. 24.. 25.. 29.. 30.. 31=. 16.6 16.6 16.6 16.6 14.4 13.3 13.3 15.4 15.4 15.4 14.4 14.9 16.0 15,4 15.4 15.4 1.5. 4 15.4 14.4 14.4 13.8 S 13.3 1 13.3 1 13.3 i 13.3 14.4 14.4 j 14.4 14.4 ! 13.3 ! 13.3 ! 14.4 14.4 15.4 15.4 18.7 18.7 16.6 17.7 17.4 17.7 17.7 17.1 17,1 17.1 17.7 17.7 16.0 16.0 19.3 19.3 19.3 17.7 17.7 17.1 17.1 16.6 17.7 15.4 15.4 24.2 ■ 24. 2 27.8 27.8 29.8 31.2 30.6 28.4 22.3 19.8 17.7 17.7 22.3 24.8 24.8 24.8 25.4 27.2 27.2 26.6 26.6 26.6 26.0 24.2 23.5 23.5 24.2 Day. Oct. Nov. Dec, 12.3 10.3 10.8 12.3 11.3 10.8 9.6 11.8 14.0 13.8 12.5 12.3 12.3 13.8 12.8 13.1 Day. 1904. 11 12 13 14....... 15 16....... 17 18 i9'. ,. 20....... 18.7 38.1 29.8 24,8 24.8 23.5 24.8 31.9 31.2 33.2 10.1 10.3 10.8 10.8 10.8 11.3 10.1 10.8 10.3 8.7 13.6 12.5 11.1 12.3 13.3 13.3 15.1 12.5 14.0 13.1 Day. 1904. 21 22....... 23 24 25 26 27 28. 29....... 30 31 33.8 35.1 29.8 33.2 28.4 24.8 23.5 28.4 23.5 33.2 11.3 8.9 10.1 10.1 10.1 9.2 8.7 9.4 12.5 12.5 12.8 12.3 12.8 12.8 12.0 11.8 ►13.6 12.8 15.7 SA:NrTA AKA EIVER BASIIS". 290 WATERMAST CAHYOH CHEEK HEAE, SA^ BEBITAKDIHO, CAMF. Location.— In SW. i SW. i sec. 2, T. 1 N., R. 4 W., above old toll bridge at moutli of canyon, abont 6 miles north of San Bernardino, San Beniaidino County. Drainage area. — -1.55 square miles (measured on topographic map). Elevation. — ^About 2,100 feet above sea level. Records available. — November 2, 1911, to October 30, 1914. GrA.GB, — Vertical staff fastened to an alder tree on left bank about 300 feet above bridge. I>iscHARGE MEASUREMENTS. — Made fi'om foot plank 15 feet below gage or hj wading. Channel and control. — Boulders and gravel; shifts during high water. (See PI. XYI, A, p. 451). Extreme of discharge, — 1912-1914: Maximum stage occurred durlog January or February, 1914; stage and discharge unknown; no flow September 15 to 17, 1913. Accuracy. — Stage-discharge relation not permanent. Rating cunres well defined except for high stages. Gage read to hundredths once daily. Daily discharge ascertained by applying gage height to rating table or for days on which gage was not rea-d, estimated by comparison with record of flow on De^il Canyon Creek. Records for 1^11 and 1912, good* for other periods, fair. Discharge measurements of Waterman Canyon Creek near San Beimardirao, Calif., for 1911-1915: Gage height. Dis- charge. Date. FeeL SeC'ft. 1913. 1.62 L8 July 11 Oct. 6 8 1.72 2.1 L70 2.1 1914. L65 2.1 Jan. 13 L62 1.8 14 L94 8.2 16 L88 4.5 16 2,01 9.2 Feb. 6 1.78 2.8 27 1.6? LO Mar. 11 L64 1.0 29 L64 LO Apr. 16 L66 .9 " 30 1, 81 1.7 Maj' 1 8 16 1. SI L4 June 26 L83 2.8 Aug. 13 L82 2.5 Sept. 21 2.01 4.8 L89 2.0 1&15. LS5 2.0 Apr. 14 L74 1.5 Made by- Gage height. Dis- charge. 1911. Nov. 2 1912. Jan. 10 12 30 Feb. 18 Mar. 9 19 Apr. 19 May 28 Amg. 3 28 28 Oct. 22 Dec. 10 1913. Jan. 14 Feb. 10 11 Mar. 4 Apr. 4 23 May 30 F.C. Ebert. do. ....do....... ....do.. ....do....... .do ...do.. ...do.. ..do.. H. D. McGlaslian. F.C. Ebert....... do...... .....do... F. C. Ebert .....do. do...... do do H. D. McGlashau F.C. Ebert F.C. Ebert. do, do. F.C, Ebert ....do ....do. do... -...do -...do .^..do- .li. D. McGlashan. F.C. Ebert ....do.... ....do ....do ..ao. ..do ..do..... ..do Sec. -ft. 1. 63 0. 3 1.63 .3 L72 I .5 LI L2 11 9.5 10 27 14 9.5 7.6 14 13 8.4 8.3 3.4 300 SUEFACE WATER OF PACIFIC SLOPE^ SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Waterman Canyon Creel near San Bernardino, Calif., for 1911-1914. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1 1911-12. 1 ... !... . 1.7 1.7 1.8 1.8 2.0 1.8 1.9 2,0 2.0 2.0 2.4 2.1 2.1 2.1 2.1 2.4 2.5 2.6 2.6 2.5 2.6 2.6 2.6 2.6 2.6 2.6 2.6 2.6 2.8 2.8 2.8 2.9 2.9 2.9 2.5 2.5 3.4 3.1 2.9 2.9 2.5 2.3 2.3 2.4 2.4 2.3 2.9 2.9 2.6 2.6 2.6 2.8 2.9 2.8 2.8 2.8 2.8 3.1 3.1 3.4 3.1 2.9 2.7 2.7 2.8 2.8 2.8 2.8 2.8 2.8 2.8 2.6 2.4 2.2 2.2 2.2 2.2 2.1 2.1 2.1 2.1 2.1 2.1 2.0 2.0 2.1 2.1 2.1 2.1 2.0 2.0 2.0 1.9 2.0 2.1 2.2 2.1 2.1 2.1 2.1 2.1 2.0 2.0 2.0 2.1 2.1 2.1 2.1 2.1 1.8 1.8 1.9 1.7 1.7 1.7 1.8 1.8 1.8 1.8 1.8 1.6 2.0 1.8 1.8 2,5 ■■"8:2' 57 30 47 22 18 14 12 8.8 7.8 5.9 6.8 5.9 6.2 5.2 5.0 7.8 7,8 8.2 6.5 5.9 6.5 6.4 6.2 5,9 5,5 5.2 5.2 5.2 5.2 5.5 20 10.0 24 16.7 13.4 13.4 13.4 12.4 11.4 11.0 9.5 8.2 7.8 7.2 6.8 6.5 6.5 6.2 6.5 5.9 5.2 6.0 5.0 4,7 4.5 4.3 4.0 4.5 4.5 4.7 4.7 4.5 4.3 4.3 4.0 ,4.0 4.0 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.6 3.6 3.6 3.1 2.9 2.9 2.9 2.9' 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.9 2.8 2.8 2.4 2.2 2.2 2.4 2.2 2.6 2.9 2.9 2.6 2.6 2.8 2.8. 2.8 2.9 2.6 2.6 2.6 2.3 2.3 2.4 2.4 2.2 2.2 2.2 2.0 2.0 1.8 1.8 1.8 1.7 2.0 2.0 2.2 2.0 2.0 2.0 2.2 2.2 2.2 2.2 2.0 2.0 2.0 2.0 2.2 2.2 2.2 2.0 2.0 2.0 1.2 1.1 1.2 1.2 1.1 1.0 1.0 .9 .9 .9 1.0 1.1 1.2 1.2 1.1 1.0 1,0 1,0 1.0 1.0 1.0 ,9 1.0 1.0 1.3 1.2 1.3 1.3 1.2 1 2 2 1 3 4 1 2 5 1 3 6 i 1 3 7 1,3 8 1,3 9 1 1 10 1,2 11 1.1 12 .9 13 .9 14 1.0 15 1,1 16 1.3 17 1.2 IS 1.1 19 1.1 20 1.1 21 1.0 22 1.0 23 .. . 1,0 24 1,3 25 .9 28 .8 27 .9 28 .. .9 29 1.2 30 ... .. 1.3 31 .. 1 Note.— Daily discharge determined from a fairly well defined rating curve applicable Nov. 2, 1911, to Mar, 4, 1912, and Mar. 19 to Sept. 30, 1912. Indirect method for shifting channels used Mar; 9-18, 1912. No estimates have been attempted for the flood period Mar. 5-8, 1912. Discharge value for Mar. 31, 1912, in- terpolated. 1912-13, 1 2 3 5 6 7 8 9 10 , 11 12 , 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 2 1.5 2 1.5 1.0 1.0 2 1.5 2 2 1.5 2 2 1.5 1.5 2 1.5 1.5 1.5 1.5 1.5 2 2 2 2 2.5 2.5 2 2 2 1.5 2 2 2 2 2 2.5 2 2 1.0 1.5 1.5 2 1.5 1.5 1.5 1.5 1.5 1.5 2 2.5 2 2.5 2.5 3.5 2.5 2 1.5 1.5 3 2.5 2 1.5 1.5 4 3 2.5 2.5 3 2.5 2 2 2 2 2.5 2.5 2 3 3.5 25 43 12 5 5 5 4.5 5 A 3.5 3 3 2.5 2.5 2.5 3 2.5 3.5 2.5 3 4 3.5 3 2.5 2.5 2.5 2 2.5 2.5 2.5 2.5 2.5 2.5 2 2.5 2 2 2 1.5 2 2 1.5 2 1.5 2 2 2 2.5 2.5 2.5 2.6 2 2 1.5 2 1 1.5 1.5 1.0 1.5 1.5 1.5 1 1 1.5 1.5 1.5 1 1.5 1 1.0 1.5 1 ,7 1.5 1.5 2.0 2 2 2 1.5 1.6 2 1 2 1.5 1 1.5 .9 1.5 2 2 2 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1 1 1.5 1.5 .9 ,9 1,5 2 2.5 3.0 1.5 3 1.5 .2 .1 1 1,5 1.5 1 1 .7 1 .0 .0 ,2 1 1.5 1.5 Note. — Daily discharge determined from fairly well defined rating curves applicable as follov/s: Oct. I to 3, 1912 same as for Mar. 19 to Sept. 30, 1912; Oct. 4 to 21, 1912, and Feb. 26 to Aprill9, 1913; Nov. 12, 1912, to Feb. 8, 1913, and Apr. 20 to May 25, 1913; Feb. 9 to 25, 1913, and May 26 to Sept. 30, 1913. Dis- charge estimated Oct. 22 to Nov. 9, 1912, because of uncertainty in gage-height record; that tor other periods for which record is not given estimated by comparison with record of Devil Canyon Creek near San Ber- nardino. SANTA AN-A RIVEE BASIN". 301 Daily discharge, in second-feet, of Waterman Canyon Creek near San Bernardino, Calif., for 1911-1914— Continued. Day. Oct. Nov. Dec. Jan, Feb. Mar. Apr, May. June. July. Aug, Sept. Oct. 1913-14. 1... 0.8 1.0 1.2 .4 .3 1.1 1.2 .5 2.0 .3 .4 .3 .4 1.2 .3 .3 .2 .2 .6 .5 .7 .3 .3 .2 .6 .5 .3 .4 .5 .8 .5 0.6 2.9 1.1 1.2 .8 .5 .8 .8 .6 .5 .8 2.2 2.0 1.4 1.2 1.5 1.4 1.2 4.8 3.4 2.2 1.9 1.6 1.3 1.6 1.6 1.4 i.O 1.2 1.3 1.4 1.2 1.2 1.3 1.5 1.3 1.3 1.5 1.1 1.5 1.5 i.e 1.6 1.8 1.6 1.8 1.6 1.9 2.0 1.9 2.0 4.4 3.0 2.9 3.0 2.5 2.9 2.2 2.2 3.4 3.6 2.7 2.4 2.1 3.6 1.9 2.0 1.9 1.8 1.9 1.9 2.0 1.9 1.2 1.1 12 5.5 7.5 54 34 24 18 17 15 17 46 150 75 40 30 25 20 20 15 14 13 12 11 10 10 9 8.5 8 8 6.5 7.5 7 7 7.5 12 15 125 175 100 60 45 37 92 25 30 30 28 23 22 23 24 25 19 17 17 17 13 14 12 12 11 10 9.5 11 10 10 9.5 9.5 9.5 9 9.5 9.5 11 9.5 11 9.5 9 9 8 8.5 11 10 10 9 8.5 9.5 9.5 9 8 8 7.5 7.5 7.5 7 7.5 6.5 9 8 10 7.5 8 7 7.5 28 38 13 12 10 12 10 9.5 I 9 7.5 7.5 8 7.5 7 8 7.5 8.5 7 7 7.5 6.5 6.5 7 ? 7 7 7 7.5 I 6 6 7 6.5 6 7 6.5 9 8.5 9 6 6 6.5 5.5 5.5 5 5.5 6 5.5 5.5 6 5 5 5.5 4.6 5 3.5 3.1 3.9 4.6 4.4 4.2 4.6 3.1 3.5 3.9 3.9 3.5 3.5 2.9 3.3 3.3 3.1 3.9 4.6 3.1 3.5 3.9 2.9 3.5 2.9 3.3 4.4 4.0 3.5 3.1 2.6 3.9 2.8 3.3 3.5 3.5 3.5 2.1 3.3 2.9 2.1 2.3 3.1 1.5 1.7 2.1 1.5 1.3 1.3 2.3 1.8 2.3 1.3 2.3 .8 1.7 2.1 3.7 1.2 2.1 1.2 .9 2.3 2.1 1.3 2.3 1.8 2.0 2.3 2.1 1.7 1.3 1.3 1.8 2.0 1.8 ,8 1.5 1.7 1.3 .8 2.0 2.1 1.7 2.3 2.5 1.3 2.1 2.3 2.1 1.3 1.2 1.8 1.6 1.3 2.1 2.0 1 7 2 7 3 3.5 4 2 8 5 3.1 6 2.5 7... . 2.8 8 2.8 9 1.8 10 2.1 11 2.3 12 1.8 13 1.3 14 ...... 1.2 15... 1.3 16 .... 1.4 17 2.6 18 1.1 19 2.8 20 2.9 21 4.4 22. . . 2.8 23 2.9 24.. . .. 3.1 25 2.8 26 2.6 27 2.0 28. 1.8 29 2.8 30 3.1 31 Monthly discharge of Waterman Canyon Creeh near San Bernardino, Calif., for 1911-1914. 1911-12. November December January February March (27 days) April May June , July August September 1912-13. October. , November , December January , February , March April May June July Discharge in second- feet. Maxi- Mini- mum, mum. 2.i 3.4 2.9 2.2 57 24 5.0 2.9 2.6 2.2 1.; 2.5 2.5 3.5 43 7 2.5 2 2 1.5 1.7 2.3 2.0 1.6 1.8 5.0 2.1 2.2 1.7 1.5 .6 1 2 1 .5 .8 .3 2.28 2.78 2.35 1.94 11,7 9.03 3.96 2.74 2.12 1.19 1.12 1.77 1.47 1.84 1.62 5.34 3.50 1.48 1.05 Run-off (total in acre- feet). 136 171 144 112 627 537 243 163 130 73.2 66.6 109 87 113 100 297 215 118 77 1912-13. August September The year 1913-14. October November December January February March April May June July August September The year 1914. October 1 to 30.. Discharge in second- feet. Maxi- Mini- mum, mum. 2.0 4.8 4.4 150 30 4.6 3.7 2.5 0.1 1.1 6.5 3.1 2.6 .2 .7 0.97 1.01 1.49 2.02 19.9 31.8 14.7 10.2 7.90 5.77 3.52 2.01 1.74 8.32 Run-off (total in acre- feet). 33 89 124 1,220 1,770 904 607 485 343 216 12i 104 302 SUREACE WATER OE PACIFIC SLOPE, SOUTHERN CALIFORIsriA. DEVLL CAIIYOM" CBSEK 2JEAH. SAIT BERHABDINO,, CALIF. Location. — In SE. {: NE. I sec. 6, T. 1 N"., R. 4 W., in Angeles National Forest, at mouth of canyon, 200 feet below ford, and 7 miles northwest of San Ber- nardino, San Bernardino County. Dbainagb AifEA. — 6.16 square miles (measured on topographic map). Elevation. — ^About 1,800 feet above sea level. Records available. — November 1, 1911, to September 30, 1912, and October 1, 1913, to September 30, 1914. (Discharge measurements only for year 1912-13.) Gage. — Vertical staff fastened to alder tree on left bank about 200 feet below ford; weii* gage was a vertical staff in pool directly above weir, 500 feet above original staff. Disci-iARGE MEASUREMENTS.— Made from foot plank about 100 feet below gage or by wading. Channel and cgnthol. — Boulders and gravel; somewhat shifting during high stages. Extremes of discharge. — 1912-1914: Maximimi stage recorded, 4.31 feet at 8 a. m. January 26, 1914 (discharge, 204 second-feet); minimum stage recorded, 1.28 feet August 21 and 22, 1912 (discharge, 0.08 second-foot). Diversions.— Severance canal, which has its intake on left bank at weir 500 feet above original gage, occasionally diverts a small amount of water for irrigation. This diversion, whenever reported, has been combined with discharge of creek to give total run-off from drainage area. Accuracy. — Stage-discharge relation not permanent. Eating curves fairly well defined. G-age read to hundi^edths usually twice daily except for periods when no observations were made. Daily discharge ascertained by applying mean daily gage height to rating table discharge. August 28 to September 30, 1912, and (October 1, 1913, to January 24,^ 1914, determined by means of a 30- inch Cippoletti weir; discharge for days when gage was not read, estimated by comparison with record of flow of Waterman Canyon Creek. Records fair. Cooperation. — Gage-height record furnished by United States Forest Service. Discharge measurements of Devil Canyon Creek near San Bernardino, Calif., for 19 ll- 1914. e by- Dis- charge. Giage height. Dis- charge. 1911. Nov. 1 1912. Jan. 12 rel>. 19 Mar. 10 19 Apr. 19 May 28 Aixg. 3 26 Oct. 24 Dec. 10 1913. JaH. 14 Feb. 10 Mar. 3 Apr. 4 F. C. Ebert ....do.... ....do.... ....do ....do.... ....do.... ....do.... ....do.... do ....do F. C. Ebert. do ....do ....do....... Feet. L48 1.55 1.51 2.15 L63 1.43 1.37 1, 5.9 1,61 L54 L62 L86 Sec-ft. 2,1 2.9 2.0 18 4.5 7.2 2.5 .4 1.2 LI L7 1913. Apr, 23 July 11 Oct. 8 1914, Jan. 13 16 16 Feb. 6 27 Mar. 11 29 Apr. 16 May 1 8 16 June 26 Aug. 13 Sept. 21 H. D. McGlashan. F.C. Ebert .....do ....do ....do ....do...... ..do.. H. T>. McGlashan. , F.C. Ebert ....do , ....do ....do.... ....do ....do ,.do.. Feet. 1.68 1.43 L33 L59 L97 LSI L74 2.20 L86 1.79 1.68 L88 1.77 1.75 L58 L50 L40 Sec-ft. 2.0 .4 08.P a5.2 7..& 25 12 9.6 6.3 12 7.5 7.1 3.e 2.1 La a Measured by weir. hANTA A:NA EIVER BASII!^, 303 Dcdiy discharge, in second-feet, of Devil Canyon Creek near San Bernardino, Calif., for 1911-1914. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1911-12. 1 2.0 2.1 2.1 2.2 2.2 2.2 2.2 2.3 2.3 3.8 2.6 2.3 2.3 2,3 2.2 2.2 2.2 2.2 2.2 2.2 2.3 2.4 2.4 2.6 2.6 2.4 2.4 2.5 It 2.4 2.4 2.3 2.6 2.4 3.0 2.9 2.7 '' 2.3 a 2! 4 a2.5 2.6 2.5 2.5 a 2. 5 a 2. 5 a 2. 5 a2.5 2.5 a2.4 2.3 o2.3 o2.3 02.3 a 2. 3 a2.3 a2.3 2.S 02.3 a 2. 3 a 2. 3 a2.3 a2.3 a2.3 2.3 a2.3 02.3 a 2. 3 6 2.3 2.1 2.1 2.0 1.9 1.7 1.7 1.7 1.7 6 1.7 6 1.7 61.7 1.7 6 1.7 9.5 11.0 9.0 50 6 30 11.0 7.0 6v0 5.5 6.5 29 147 66 25 21 a 2. 3 02.3 a2.3 2.2 02.2 a 2. 2 a2.2 ff2.3 ffl2.3 a 2. 3 2.3 tt2.3 «2,3 a2.3 ffi2.2 02.2 02.2 2.2 2.3 a2.3 02.2 2.2 a 2. 2 a 2. 2 2.2 a2.2 02.2 a 2. 2 2.2 14 12 10 8.5 8.5 8.5 68 7 7 7 7 7 7 7 67 6 7 610 98 164 6 90 56 38 30 28 25 25 2.8 a 5.0 37.2 9.4 i9 9.4 16 a 14 0512 all a 10 8.4 06.4 4.5 5.3 «5.0 04.7 a 4. 4 4.2 a4.4 a4.6 a4.8 a5.0 5.2 a5.1 5.0 6 21 17 17 17 15 15 15 614 14 14 12 10 10 10 6 10 10 10 69 8.5 10 10 &1G 10 10 10 10 10 12 12 i 10 |I0 a4.6 4.1 a4.0 a3.9 3.9 «3.9 3.9 3,8 6.9 9.7 18 20 10 11 11 10 9.4 8.4 7.8 7.3 6.5 5.7 5.2 5.0 4.8 5.7 5.2 4.8 4.4 4.2 10 10 10 10 10 10 10 ■ 8.5 8.5 10 10 8.5 8.5 8.5 7 : 7 7 7 6 6 7 8.5 8.5 8.5 8.5 7 8.5 19 16 4.2 a 4. 2 4.2 04.1 4.0 4.2 a 4. 6 5.0 4.4 4.0 3.8 4.0 3.8 3.4 p. 2 2.9 2.6 2.4 2.2 2.2 a2.2 2.2 2.1 a2.1 2.1 2.1 1.9 1.9 1.8 1.8 1.8 16 16 14 14 12 10 12 8.5 10 8.5 8.5 8.5 8.5 12 10 10 8.5 7.5 8.5 7.5 7.5 8.5 7.5 10 8.5 8.5 8.5 7.5 6 6 5 1.8 1.8 «1.8 al.8 cl.S al.8 1.8 1.7 1.8 1.8 1.8 1.8 1.8 1.8 0I.8 1.8 1.6 1.6 1.6 1,5 1.5 1.6 1.4 1.3 1.1 1.1 1.0 .9 .8 .8 6 ■ 6 6 6 7.5 7.5 8.5 8.5 6 7.5 6 5 . 5 5 5 5 4 4 4 4 4 3 3 3 3 3 3 3 3 3 .0.7 j 'A .6 .6 .6 .5 .5 05.4 .4 .4 .4 .4 .4 .4 .5 0.3 .3 .4 .4 .4 .4 .3 .3 .3 a. 3 .3 .3 .3 .3 3 3 . 3 3 2 2 2 2 2 2 1.5 1.5 1.5 2 1.5 1.5 1.5 1.5 2 2 2 1.5 1 1 1 1 1.5 1.5 1 .7 .7 0.3 .3 .4 .3 .3 a. 4 .4 0.4 .3 .4 a. 4 .4 0.4 .3 .3 .3 .3 .3 .3 .08 .08 .3 .3 .1 .2 a. 2 .30 .40 a. 52 .65 1.0 1.0 I.O .7 .7 1.0 1.0 1.0 .7 .7 .7 .7 1.0 .7 .7 .7 .4 .4 .'4 .4 .7 .7 .7 .7 1.0 1.0 i!o 1.0 0.75 2 .87 3.. .99 4 1.2 5 " 1.1 6 .87 7 .87 8 .87 9 .87 10 ■■ .59 11 .75 12 -.. .49 13 a. 52 14 .54 15 .54 16 .49 17 . .49 18 19 _ .49 .44 20. .44 21 .44 22 .44 23 .;... .44 24 ...J .49 25 .49 26 '■ .49 27 ..1 . .. .49 28 .49 29 .49 30.. .49 31 1913-14. 1... 0.5 .4 .2 .2 .3 .35 .35 .25 .2 .2 .2 .35 .35 .25 .3 .2 •J .2 ,2 .35 .4 .45 .5 .55 .55 6.5 b. 5 &.5 .5 .5 .5 1.5 1.4 .7 .75 .65 .65 .6 .5 .45 .6 1.0 3.9 &1.5 6L5 6 1.5 6 1.5 6 1.5 6 5.0- 6 3.5 62.a 1.8- 2. a 1.5. &1.5 6 1.5 1.5 1.5 6 1.5 6 1.5 1.7 6 1.7 1.7 1.7 1.7 6 1.6 1.6 6 1.6 1.6 1.5 6 1.5 1.5 6 1.4 1.4 1.4 6 1.4 61.4 1.4 1.4 .61.4 1.5 2.3 6 1.4 2.3 2.1 6 2.5 6 3.0 2.0 2.0 6 2.5 2.5 .7 2 .7 3 .7 4 . .7 5 .7 6 .7 7 .7 8 .7 9 .7 10 ....... .7 11.. .7 12 .7 13 1.0 14 .7 15 16 .7 .7 17 .7 18 .7 19 7 20 .7 21 1.0 22 1.0 23 1 24 1,0 25. 1 26 1 27 1.0 28.... 1 0* 29 1 30... 1.0 31 a Gage not read, discharge interpolated. 6 Gage not read, discharge interiiolated or estimated by co.mpaiison with record of flow on Waterman Caaiy on Creek. Note.— No record Dec. 9-31, 1911, and Mai'. 5-19, 1912. 304 SURFACE WATER OF PACIFIC SLOPE, SOUTHERI^ CALIFORITIA. Monthly discharge of Devil Canyon Creel near San Bernardino, Calif., for 1911-1914, Discharge in second- feet. mum. mum. Run-off (total in acre- feet). Discharge in second- feet. Maxi- Mini- mum, mum. Rtm-ofl (total in aere- feet). 1911-12, November. . December 1- January February. . . April May June July August 3.8 3.0 2.6 2.3 20 5.0 1.8 .7 .65 1.2 2.0 2.3 2.3 2.2 3.8 2.35 2.59 2.37 2.24 7.10 3.08 1.55 .42 .32 .63 140 41.1 146 129 422 189 92.2 25.8 19.7 37.5 1913-14. October November. . December.. January February. . . March April May June July.: August m The year 0.55 5.0 3.0 147 164 21 19 16 8.5 3.0 1.0 1.0 0.2 .45 1.4 1.7 7.0 8.5 6.0 5.0 3.0 .7 .4 0.34 1.52 1.76 16.3 25.4 12.0 4.92 1.72 .77 .81 184 ;.8i 21 90 108 1,000 1,410 738 537 583 293 106 47 . 48 LYTLE CREEK AT MOUTH OF CANYOIT NEAR RIALTO, CALIF. Lytle Creek drains the southern slope of the Sierra Madre and discharges its waters upon the plains northwest of San Bernardino. Although it drains a comparatively small area of 54 square miles, at the mouth of the canyon its waters are important for irrigation. Owing to the controversies which have arisen over its diversions, a number of lawsuits for the settlement of the claims have been insti- tuted from time to time. A number of measurements of this stream at the mouth of the canyon from 1892 to 1896, inclusive, are given below. They are copied from court records of proceedings in which the water supply of this creek was involved. These cases were tried in the San Bernardino courts by Judge A. W. McKinley. The measurements were made by A. H. Koebig and G. O. Newman, on weirs, and are believed to be accurate. Discharge vieasuremerits of Lytle Creek at mouth of canyon near Rialto, Calif, for 1892-1896. Date. Discharge. Date. Discharge. Date. Discharge. 1892. June 3 Second-feet. 35.58 18.70 22.04 20.64 22.04 20.68 49.20 49.20 46.34 45.30 1894. June 6 Second-feet 17.96 15.50 13.22 13.22 13.36 11.44 12.32 16.20 56.10 40.78 1896. Mar. 3. Second-feet. 18.08 Sept. 20 8 Apr. 23 19.14 30..... July 10 24 18.60 Oct. 28 ^ 11.... 25 20.52 JSfov. 21 25 May 3 18.52 27 Aug.l9 17.26 ^ 25 . 10 18.16 1893. Oct. 3 1895. Sent 2 25 15.32 Sept. 7 26 12.84 ^ 18 25 Oct. 4 ^ so".:;: Beginning in 1894, measurements of Lytle Creek were also made by H. D. Sibley, who was zanjero of the Lytle Creek canals at that time. The measurements were usually made because the discharge of the SANTA AFA KIVER BASIN. 305 stream was below normal. In the winter and spring only the quan- tity of water needed for irrigation was turned into the ditches, but later in the summer the entire flow was diverted. These measure- ments also were made over weirs, and are believed to be fairly accurate. During 1898 trouble was experienced by miners taking the water from the natural channel and turning it into dry channels, sluice boxes, weirs, mill races, etc., thereby causing a loss of from 20 to 25 per cent of the total flow of the creek. Only a portion of these diversions were returned to the creek. The measurements of Mr. Sibley would not show the full flow of the Lytle Creek at all times, and sometimes show less than the full discharge, for the reasons mentioned above. During 1899 the quantity of water which was diverted into the main canal was measured daily by the Anglo- American Canaigre Co., at a weir erected near the head of its cement ditch. The volumes given have been occasionally checked by visit- ing the canal and making meter measurements. It is believed that during 1899 practically all of the water of the stream was diverted into the canal. Daily discharge, in second-feet, of Lytle Creeh main canal above Rialto, Calif , for 1894- 1901. Day. Apr. May. June. July. Aug. Sept. Day. Apr. May. June. July. Aug. Sept. 1894. 1 15.5 1894. 16. 22.6 'ig.'i' 14.4 2 17 3 24.1 17.2 10.9 18. . 16.0 'ii'i" 13.7 11.5 4 19 22.6 5. 16.1 10.8 20 6 22.6 21 14.8 12.7 7. 14.1 22. 24.9 11.9 12.7 8 19.9 10.8 13.0 23 14.6 14.9 9. 24 18.2 10 25 25.4 11. 17.8 18.5 14.3 10.8 26 12 27 15.0 13^ . 21.8 13.4 28. 16.6 14 14.3 13.2 29 15 30 31 11.7 13.4 142131°— 21— wsp 447- -20 306 SUEFACE WATER OF PACIFIC SLOPE ^ SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Lyile Greek main canal above Rialto, Calif., for 1894- 1901 — Continued. Day. Oct. Not. Apr. May. June. July. Aug. Sept. 1894-95. 1 54.4 2 3 13.5 I 4 68.0 61.4 5 6 1 7 11.4 14.5 8 33.9 9 .... 13.7 10... 48.8 11 . 13.7 12 50.8 13.. I 14 . ' i 15 16 . ' 50.4 17 1 i 44.8 18 li. 5 26.4 43.8 1 19 i 20 i 21 ! 57.5 22 1 ... . 12.9 23 37.4 52.5 24 47.1 25 14. 2 ! 28 1 . 54.4 27;...:: i.;.:.:.. 28 '' 36.5 29 30 12.5 31 ....' . 1 Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. ; Sept. 1895--95. 1 17.8 ; 13.2 2 22.2 14.1 11 1 3 36.9 4 " 1 i ° 6 ... 20.0 ! 6 11 4 i 12.2 30.5 11.5 8 31.5 19.2 11.1 9 13 12 t^ 10 ^ . 12.2 11 24.9 i 1 1 12 ! 11.9 10.5 13 22.0 18.4 14 12.2! 12.2 15 24.9 16.. 21.4 17.1 13. 7 10.8 17 19.8 18 41.9 19.7 11.3 19 ... 11.8 20 1 10.5 21 36.5 34.1 12.0 22 24.0 23 i2.5 12.5 24 1 22.4 25 20 . 11.8 27. 10.7 28... 34.5 13.5 29 17.5 30 15.0 31 34.5 SANTA AKA KIVER BASIl^. 307 Dailij discharge^ in second-feet, of Lytle Creek main canal above Rialto, Calif., for 1894- -? 9(97— Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. Aug. 1896-97. 1 2 3 60.0 4 30.0 5 12.2 6 60.0 7 24.0 8 9 11.6 16.0 50.0 30.0 10 16.0 11 12 10.6 13 14 16.0 60.0 15 16 17.0 24.0 34.0 17 18 1 80.0 1 19 60.0 20 21 50.0 22 16.0 23 11.1 24 50.0 25 28.0 " ■ ' 20.0 60.0 26... . 20.0 27 ::::::::::::: 28 56.0 70.0 40.0 29 28.6 30 24.0 31 1 Day. May. Jime. July. Day. May. June July. Day. May. June. July. 1898. 1 10.9 1 1 1 i 1 1 1 1 2 1898. 1 1898. 21 2 2 ' 1 22 .. . 11.7 3 1 3 ::::::i::;;::i 23 4 .|... i 1 i 24 5 ..} ' :l::::: f; 13.9 25:::::::::':: """■"■ 6 1 1 3 26 7 1 7 27 8 ! 28 14.6 9.0 9 i 9 29 10 i 11.5 30 31 308 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Lytle Creeh main canal above Rialto, Calif, for 1894- i 9 W— Continued. Day. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. Oct. Nov. Dec. 1899. 1 11.1 12.1 12.1 11.4 11.7 11.6 11.6 ia.6 11.6 12.0 16.1 13.1 12.2 12.0 11.9 12.0 12.0 12.0 11.9 11.8 11.7 11.8 11.7 11.6 11.6 11.6 11.6 11.6 11.6 11.6 11.7 11.8 12.1 12.1 12.4 12.4 12.5 12.6 12.4 12.1 11.8 11.8 11.8 11.8 11.6 11.5 11.5 11.5 11.3 11.4 11.3 11.3 11.3 11.3 11.8 11.4 11.4 11.3 11.3 11.2 11.1 11.2 11.1 10.8 10.6 10.4 10.4 10.9 10.6 10.6 10.6 10.7 10.7 10.7 15.3 14.7 13.7 12.3 13.7 13.1 12.9 12.8 13.2 14.8 13.5 13.4 13.6 13.6 13.5 13.5 9.7 8.9 8.5 12.6 12.5 12.1 11.9 11.8 11.7 11.9 11.7 11.7 11.0 10.6 10.6 10.7 10.6 10.7 10.2 10.8 9.9 9.9 10.3 10.6 10.5 10.4 10.4 10.4 11.0 11.2 11.2 10.9 10.9 10.5 10.5 10.5 10.5 10.2 11.8 9.5 9.5 9.2 9.6 9.5 9.8 9.4 9.4 9.4 9.7 9.8 9.5 9.4 9.4 9.2 9.2 9.0 9.0 9.0 9.4 9.3 12.2 10.4 9.7 9.5 9.4 9.6 9.2 9.0 '"7.'2" 7.5 8.2 8.1 7.8 7.6 7.8 7.9 7.7 7.3 7.5 7.6 7.4 7.1 7.2 7.4 7.3 7.2 6.7 6.4 6.3 6.8 6.4 6.4 6.4 6.4 6.3 6.2 6.2 6.0 5.9 6.0 5.9 5.9 6.0 6.0 5.8 5.4 5.6 5.6 5.8 7.2 8.6 9.3 8.9 9.2 9.4 9.5 9.7 9.6 10.0 9.4 10.4 9.6 10.7 12.2 11.0 10.8 11.0 11.0 8.7 12.0 12.0 12.2 12.1 12.3 12.3 12.2 12.6 13.0 13.0 12.5 12.4 12.4 12.5 12.4 12.6 12.5 12.2 12.3 12.2 12.1 14.5 15.1 16.6 16.7 16.0 16.0 16.0 15.9 16.5 16.1 16.0 15.8 15.3 15.4 16.0 15.5 15.3 14.3 15.7 14.9 15.2 16.1 10.8 10.4 10.3 10.3 10.5 10.5 10.6 10.6 10.9 10.8 10.8 10.8 10.7 10.6 10.1 9.9 10.2 10.8 11.7 a 72.1 12.4 13.5 12.7 13.0 13.0 12.3 12.0 11.4 11.2 11.6 11.9 10.3 10.7 11.4 11.3 11.1 11.0 11.4 11.3 10.5 10.3 10.3 10.6 10.5 10.6 10.6 9.9 9.9 10.0 10.2 10.5 10.9 11.0 11.3 11.7 11.5 12.0 11.9 11.8 12.2 12.7 12.1 12.0 13.8 H:'5 11.5 11.4 11.2 11 1 2 11 3 3 11.4 4 11 1 5 11.3 6 11.3 11.3 8 11.6 9 11.4 10 11.5 11 11.4 12 11.3 13 11.2 14 11 1 15 11.2 16 12.9 17 11.8 18 - ... 11.8 19 11.6 20 11.6 21 11.3 22 11 1 23 11.1 24 11.1 25 10.9 26 11.2 27 11.1 28 11.1 29 11.2 30 11.1 31 11.3 Day. Apr. May. June. July. Aug. Sept. Oct. Nov. 1 1901. 21.7 20.4 19.8 18.5 13.8 14.9 15.2 15.1 14.3 12.1 12.7 13.5 14.0 14.3 14.3 16.1 16.1 16.1 16.1 16.1 15.8 14.9 14.9 15.8 18.5 16.7 16.1 16.1 16.1 16.1 15.2 14.0 15.2 14.6 14.3 13.2 13.2 13.2 14.6 13.2 12.4 12.9 12.7 12.7 11.3 11.6 11.3 11.1 10.5 10.2 10.5 10.2 10.2 10.0 9.7 9.5 9.5 9.5 9.5 9.5 9.5 9.5 8.7 9.0 9.5 9.2 9.5 10.5 10.0 10.2 10.8 10.8 11.0 11.3 11.3 11.0 10.5 10.2 10.5 10.5 10.5 10.5 10.2 10.2 10.0 10.0 10.2 10.5 10.8 10.5 10.5 10.0 10.2 10. 2 10. 10.0 10.0 9.7 9.5 9.5 9.2 9.2 9.5 9.7 9.7 9.7 10.0 9.7 9.5 9.5 9.2 9.2 9.0 9.0 8.7 9.0 9.2 9.5 9.7 11.3 11.5 11.0 10.8 10.5 10.5 10.2 10.8 11.3 11.0 10.8 10.8 10.8 10.8 10.5 10.5 12.6 12.4 12.1 11.8 12.1 12.4 12.4 12.6 13.2 12.6 13.2 13.2 12.6 12.6 13.5 14.0 14.0 15.8 17.6 2 17.3 3 18.5 4 18.8 5 18.5 6 18.5 7 . . 8 9 10 . . 11 14 15 . .. 12.9 12.1 12.1 12.1 12.1 12.4 12.4 11.6 11.8 12.9 12.7 12.1 11.6 11.0 11.0 10.5 17 18 21 22 23 24 25 26 27 16.1 16.1 16.1 16.1 28 29 16.1 16.1 15.8 31 1 a Rain in mountains. SANTA ANA EIVER BASIN. 309 Monthly discharge of Lytle Creek canals at intake for 1899. [Drainage area, 54 square miles.] Discharge in second-feet. Run-ofi. Montli. Maximum. Minimum. Mean. Per square mile. Depth in inches on drainage area. Total in acre-feet. 1899. 16.07 12.60 15.29 12.55 11.78 12.20 10.02 12.60 16.68 72.14 12.69 12.93 11.07 11.29 10.37 8.47 8.98 6.39 5.41 8.68 10.29 9.85 9.90 10.94 11.90 11.74 12.23 10.83 9.81 8.14 7.06 11.76 14.30 13. 30 11.20 11.30 0.220 .216 .226 .200 .181 .150 .131 .218 .265 .246 .207 .209 0.25 .23 .26 .22 .21 .17 .15 .25 .30 .29 .23 .24 732 650 March 750 April 643 May 603 482 July 437 726 September 851 October 818 666 Decembe*" 695 8,050 Monthly discharge of Lytle Creek at headgates of Rialto canals for 1901. [Drainage area, 52 square miles.] 1901. May June July 1-23 August September October 1-25, 29-31.. Discharge in second-feet. 21.7 15.2 11.3 11.5 12.1 10.5 9.7 8.7 i 15.8 12.6 10.0 10.4 9.8 12.7 Per square mile. 0.30 .24 .19 .20 .19 .24 Depth in inches on drainage area. 0.35 .27 .16 .23 .21 .25 Total in acre-feet. 971 750 456 639 583 705 LYTLE CREEK NEAR SAN BERNARDINO, CALIF. Location.— In NW. \ sec. 26, T. 2 N., R. 6 W., at Southern California Edison Co.'s diversion dam, below junction oi North and Middle forks of Lytle Creek, in Angeles National Forest, about 3 miles above mouth of canyon, and 14 miles northwest of San Bernardino, San Bernardino County. Drainage area. — Not measured. Elevation. — About 2,800 feet above sea level. Records available. — September 18, 1904, to September 30, 1918, Gage. — Watson water-stage recorder in pool above weir in power canal. Discharge. — Computed by combining flow in power canal with flow over diverting dam ; discharge of power canal is measured near intake by an 8-foot steel plate rec- tangular weir; flow over diverting dam is estimxated. Extremes OP discharge. — 1904-1918: Maximum mean daily discharge reported, 4,750 second-feet January 18, 1916; minimum mean daily discharge reported, 5.1 second-feet September 30 and October 3, 1904. Diversions. — No information. Regulation. — No information. Accuracy. — Daily discharge is mean of two observations recorded each day at 6 a. m. and 6p.m. Records are good for periods during which total flow of creek is di- verted into power canal; for discharges above 23 second-feet (capacity of canal) they are subject to error. Cooperation.— Daily discharge record furnished by Southern California Edison Co., through H. W. Dennis, construction engineer. 310 SURFACE WATER OF PACIFIC SLOPE ^ SOUTHERN CALIFORI-TIA. Daily discharge, in second-feet, of Lytle Creek ryear San Bernardino^ Calif ..for 1904-1918, Day. Sept. Oct. iNOV. Dec. Jan. Feb.' Mar. Apr. May. June. July. Aug. Sept. 1904-5. I 5.3 6.2 5.1 7.5 7.6 8.2 8.5 8.6 8.8 8.7 8.6 8.6 8.4 8.3 8.5 8.4 8.4 8.4 8.2 8.3 8.4 8.4 8.7 7.7 8.0 7.8 7.8 7.8 7.8 7. '?,\\ 1^'eb. T^ ?A Mar. 9 10 2\ Apr. 10 2>< May. 6 2« 19: 7 Jan. 17 F. C. Ebert do... do... do... do... do .....do... do... do... do... McGlashan and Ebert. F.C. Ebert Gage Dis- heiglit. charge. Feet, a 10. 40 a 10. 32 8.40 2.97 3,30 3.20 2.74 2.37 1.83 1.42 1.38 1.19 Sec. -ft. 680 651 376 236 349 324 180 115 32 9.3 5.4 1.3 1917. Feb. 13 24 Mar. 7 16 27 Apr. 21 May 20 Dec. 20 1918. Mar. 5 17 Made hy- F. C. Ebert ....do ....do ....do ....do McGlashan and Ebert. F.C. Ebert ....do ....do ....do ....do Gage Dis- height. charge. Feet. 1.16 1.68 2.33 2.02 1.33 1.27 1.09 1.19 1.17 1.98 2.00 Sec.-ft. 0.9 19 95 47 4.7 2.7 .4 a Original gage at railroad bridge. Daily discharge, in second-feet, of San Jacinto River near Elsinore, Calif, for 1916-1918. Date. 21. 22., 23. 24.. 25., 2C.. 27., 28., 29., 30.. 31., Nov. Dec. Jan, 2 3 3 3 2 2 2 2 2 730 830 1,760 0,800 1,750 1,010 580 680 730 580 1,010 14, 000 6,800 ol, 750 ol, 350 al, 170 a 1,120 agio o730 G060 610 a 570 a 510 O430 387 350 350 315 315 282 251 251 251 251 251 223 223 223 251 251 251 315 350 350 350 350 315 350 425 350 315 282 251 251 223 223 195 169 146 158 169 195 251 251 350 332 315 J* 283 251 223 195 Apr. 6 34 29 S2 b2S 6 25 May. 9.5 9 6.5 6. 5 6 4 2.8 6 2.2 June. July. 1.6 1.5 1.4 1.0 Aug. 60.0 b .0 .0 6.0 6.0 6 6.0 .0 .0 3.5 6 3.8 6 4.0 6 4.3 4.6 2.6 6 2.4 6 2.1 61.8 1.6 6 1.6 Sept. 61.5 6 1.5 61.4 61.4 61.3 61.3 1.2 6 1.2 6 1.2 6 1.2 6 1.3 6 1.3 1.3 61.3 6 1.2 6 1.1 6 1.0 6.9 6.9 6.9 6.9 I Estimated, backwater at gage. 6 Gage not read, discharge interpolated. 320 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of San Jacinto River near Elsinore, Calif., for 191&- 1918— Gontmued. Date. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1917. 1 1.6 2.1 2.1 a 2. 2 a 2. 2 2.3 o2.2 2.1 «1.8 1.6 1.6 2.6 2.1 a 2. 4 2.6 a 2.0 1.5 2.6 15 10 olo 20 15 10 6.5 4.6 3.5 o3.5 3.5 2.6 2.1 1.2 61.2 1.2 61.3 1.4 61.4 1.4 1.4 61.4 1.4 1.6 61.3 61.0 .7 .5 .6 .5 6.5 .5 6.5 6.6 .6 6.6 .6 ,7 2.1 62.1 62.1 2.1 1.6 1.2 2.1 2.1 1.6 a 1.5 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.2 1.4 1.2 a 2. 9 4.6 6.5 11 11 11 15 ' 30 a 74 119 126 alio 94 84 80 a 82 84 84 94 66 58 a 58 58 58 58 58 a 56 53 a 49 a 45 42 40 38 36 35 33 a 19 5 4.6 4.0 5 2.6 a 20 1.2 1.2 6.8 .4 .4 C2.0 C4.0 6.5 c20 c40 61 750 750 705 266 158 49 31 6141 251 146 51 47 46 627 8.5 6.5 63.6 .7 6.6 C.5 a 40 58 63 27 25 10 8 a 7. 5 7 3.0 2.6 1.6 1.6 6.5 a 12 17 16 6 10 3.5 6.5 4.6 o7 9.5 9.5 a8 7 8 a 20 32 0.5 .4 .4 6.4 .4 6.4 .4 6.4 .3 6.2 .2 6.2 :l 6.2 .2 6.4 .6 6.4 ,3 .3 .2 6.2 .2 6,2 .2 6.2 6'. 2 .2 35 21 a 12 2.6 a 2.0 1.4 16 3.0 a 2. 2 1.4 1.4 1.4 a 1.1 a. 8 .5 .5 «. 4 .4 .4 .5 .5 .5 .5 a. 6 a. 6 .7 '.2 .9 al.2 1.6 60.2 .2 b.2 6.2 .2 6.2 .2 .2 .2 6.2 6.2 6.2 '.2 b'.2 6.2 6.2 .2 '.2 6.2 .2 6.2 .2 6.2 .2 .2 6.2 6.2 1.4 1.3 1.2 .9 «1.0 1.2 a 1.0 .7 «.6 ,4 .5 .4 a. 3 a. 3 .2 a.l .0 o.O .0 «.0 .0 .4 a. 4 .4 a. 4 .3 .2 a. 4 .7 a. 6 0.2 .2 .2 .2 .2 .2 .1 .1 0.4 0.2 .0 a.O .0 .0 .0 a.O .0 .0 a.O o.O a.O l-.t a.O a.O o.O o.O o.O o.O o.O o.O o.O o.O o.O o.O .6 a3.4 .7 .4 O0.3 0.2 .1 2. 3 4 5 6 7 8 9.. 10 11. 12 13.. 14 15 16 17... . 18 19 20.. . 21... 22 23=.... 24.. 25 26. 27 28.. 29 30 31. 1917-18: 1 0.3 6.4 .4 .4 .4 A 6.4 .4 6.4 .4 .5 6.5 .5 .5 6.5 6.6 6.7 .7 6.7 .7 .7 .7 .7 61.0 1.2 1.2 1.2 61.2 1.2 1.2 1.2 1.6 1.6 61.5 61.3 1.2 1.2 1.6 61.5 1.4 61.5 1.6 1.6 61.6 1.6 61.6 1.6 63.3 5 63.5 2.1 1.6 61.6 1.6 61.6 1.6 1.0 61.5 61.3 2 3 4 5 6 7 8... 9 10 11 12... 13 0.2 h.2 .2 .2 &.2 6.2 .2 6.2 .3 6.3 .3 6.3 .3 6.3 .3 6.3 .3 6.3 14 15... 16 ■ 17... 18 19 20... 21 22... 23. 24 25... 26 27 28 29 30 31 a Gage not read, discharge interpolated. 6 Interpolated. Note.— River dry on all days for which no discharge is given. SANTA ANA RIVER BASIN. 321 Monthly discharge of San Jacinto River near Elsinore, Calif., for 1916-191 S. Month. Discharge in second-feet. Run-off (total in Maximum. Minimum. | Mean. aere-feet). 1916. JanTiary 14,000 1,170 425 188 21 1.6 .3 10 1.5 2 1. 300 79.900 Februai y 223 146 25 2.2 !o .0 .9 482 270 87.9 7.00 .39 .15 3.40 1.11 27,700 March 16,600 April 5,230 May. 464 June 23 July ) Aui?ust 209 September 60 The period 130,000 1910-17. January 20 126 94 63 35 1.4 6 .3 1.5 1.2 2.6 1.6 .2 .0 .0 .0 4.80 19.5 48.5 14.6 3.60 .510 .358 .019 295 February 1,080 March 2,980 April 869 May . 221 June 30.3 July 22.0 August 1.2 The year. 126 0.0 7.60 5,500 1917-18. November .3 1.2 2.1 5 750 .6 .2 .2 .0 .3 d .4 .2 .2 .0 .15 .09 1.14 1.80 115 .29 .20 .05 8.9 December 42.4 January 70.1 Febniary 100' March..... 7,070 April 17.3 May 12.3 Ju«e 3.0 The year 750 .0 10.2 7, .320 Note.— No Aoav in months for which record is not given. ELSINORE LAKE AT ELSINORE, CALIF. Location, — A short distance southeast of outlet, at Elsinore, Riverside County. Records available. — December 1, 1915, to September 30, 1918. Gage, — Vertical staff in several sections on northeast shore of lake, a short distance above outlet. The temporary staff, read January 31 to February 13, 1916, was destroyed before it could be referred to gage datum. May 10, 1918, gage datum was raised 0.06 foot. Add 1,200 feet, to published elevations, to reduce to mean sea level. History. 1 — Apparently the earliest specific reference to the amount of water in Elsi- nore Lake is contained in the notes of a traveler through southern California about 1810, who mentions "Laguna Grande," the original Mexican name for the lake, as being little more than a swamp about a mile 1 ong. For the period between that time and 1 862 data as to its rise and fall are not available, but in 1862 it was very high and probably overflowed. During the succeeding dry period, especially during the years 1866 and 1867, when practically no rain fell on the drainage area tributary to the lake, it receded very rapidly, but was full again in 1872 and over- flowed down its outlet through Temescal Canyon. After this it again evaporated to a level probably as low as it has ever been since, but the great rains of the winter of 1883-81 filled it to ovei*flowing in three Aveeks. • Prepared by Francis R. Schanck, assistant inspector of irrigation, United States Indian Service, Los Angeles, Calif. 142131°— 21— wsp 447 21 322 STJEEACE WATER OF PACIPIC SLOPE j SOUTHERN CALIFORNIA. Americans had settled around it by this time and their descriptions of condi^- tions say that large mllow trees surrounding the low-water shore line were of such si:^e that they must have been 30 or more years old. The rainfall in the next 10 years was excessive, and the lake stayed high and overflowed naturally during three or four years of the decade. It was purchased by the Temescai Water (b. for the irrigation of lands at Corona, Calif., and its outlet channel was deepened, permitting gravity flow to Corona for a year or more after the lake level had sunk below the elevation of its outlet. As the surface still receded a pumping plant was installed and the water was raised a maximum of about 10 feet and then flowed down the natural channel of Temescai Canyon. Pumping was continued a couple of seasons, but the concentration of salts in the lake, due to the evaporation and low rainfall, soon made the water unfit for irrigation. After 1893 the level sunk almost continuously for nearly 10 years, ivith, 'A course, a slight rise every winter. The heavier precipitation beginning in 1 903, gra,dually filled the lake about half the depth between its minimum level since ^ 1883 and its high level or overflow point. The flood of January, 1916, rapidly raised the level to overflowing, although the run-off from its drainage area int:^ the lake appears to have been considerably less than that of the wet years of 1883- 84 and 1888-89. The fact that large trees were growing 20 feet or more below the high-vv-ater level when the lalje filled in 1883-84 indicates that the high water of the sixties and seventies must have been of very short duration. The stumps of the trees Vv^ere still visible in 1888 and 1889 many hundred feet from shore, 'out bj^ the time the lake receded in the middle nineties these had disappeared. Daily elevations, in feet ^ af Elsinore Lake at Elsinore, Calif., fcr 1915-19 IS. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1315-16. • 45.2 45.4 45.3 45.3 45.3 45.3 4.5. S 45.3 45.3 45.4 45. 4 45.4 45.4 45.4 45.4 45.4 45.4 46.7 47.2 48.7 50.2 51.2 52.2 52.7 62.-9 53.2 54.0 54.5 55.5' 57.5 58.5 O22.0 022.2 a22.5 22.8 O23.0 a 23. 3 023.5 C23.5 «23. 7 «23. 9 a2L\ fl24.2 B24.4 «24. 5 : 03.5 63.6 63.9 63.8 63.8 §3.9 63.9 63.9 64.0 64.1 64.2 64.2 64.3: 64.3 64. 3 64.4 64. 5 : 64.5 64.6 64.7 64.8 64.9 65.0 65.1 65.2 05.2 65.3 65.3 65.3 65.3 6.5.3 65.3 65.3 65.3 65. 8 ■ 65.6 65.6 65. G 65.6 65. G 65.6 65.5 65.5 65.5 65.5 ■SS. 5 : 65.5 "65." 5 " 65.5 65.5 65.5 65.5 65.4 65.4 65.3 65.3 "es.'s"; "65." 5" 65.2 "65." i" 65. 1 65.0 65.0 65.0 61.8 61. 7 64.7 64.6! 64.6 64.6 64.6 €4.5 64.5 ; "64." 5' 64.4; 64. 4 64.8 84.3 64. 2 •6-12 64.2 64.2 64.1 64. 1 G4.0 64.0 64.0 64.0 64. 63.-9' 63.8 "63.6" "63." 6" 63.5 '"ei's" 63.4 "63." 4" 63.4 63.3 6^.3 63.3 63.2 63.2 '"6;3."2" 63.2 "63." i" 62.6 62.5 62.5 62.5 62.5 61.6 61.2 2 3 45.2 A. 61.6 81.0 6 45.2 7... . 62.4 62.4 62.4 62.4 62.4 62.0 61.6 61.0 8 :...::: 9 10... 45.2 61.5 61.4 61.4 11 12 13 45,2 14 61.4 61.4 15 63. 63.0 62.0 60.8 16 45.2 45.2 17 18 62.9; 62.9 ' 62.9; 62.8 62.8 62.8 62.8 62.0 "ei'o" "hi'.b'. ' "ei.'s" "6i."3" 61.3 ""ei.'s" 60.8 19 20 45.2 21 22 60.8 23 24 45.2 25 61.3 : 26 62. 7 ! 62.7 «2.7; 62.6 62.6 60 8 27 61.8 "eiJs" 28 61.2 29 60 6 30 45.3 45.3 31 » I^CTSjpeartsa-y gage, a©* refesntsd. SANTA AI^A RIVEE BASIN. 328 Daily elevations, infect, of EUinore L&he at Elsinore. Calif., for 191 5-19 IS — Continued. Day. 1 Oct. Nov. Dec. Jan. Fob. Mar. Apr. May. Jun? . July. Aug. Sept. 191G~17. 1 GO. 6 60.2 60.4 51 6 2 60.4 60.0 §0.5 60.0 60.0 59.7 3. . .. 60.6 60.7 4 60.4 . 60.0 59. G 5 GO.G. '"60^7' m.s 59.7 6 60.6 , 00.2 . 60.4 60.6 59.6 "m.Q g 6a4 : "'go.'o' 60.2 "60." g' 60.4 59.8 59.6 9 10 eo.6 60.3 60.4 11 60.2 59.6 12 60.0 60.2 60.8 60.6 60.7 60.4; 59.8, 13 60.6 14 60.3 m.8 69.4 59.8 "59.6' 59.6 15 60.2 60.0 00.2 16 GO. 3 60.8; 59.8 17 60.7 60.7 59. G 18 60,2 60.0 ■ "■60.' 4' 60.4 60.4 59.8 19 60.3 ; 20 60.6 60.4 60.8 60.6 21 60.2 59.8 59.G ■ 22 60.0 60.8 60. G 60.2 23 ■ 60.5 , 59. G 24 60.0 "eo.'o" 60.4 60.8 60.8 ""go." 6' 60.0' 25 60.4 GO.l 2G 60.6 60.2 60.2 27. 60.0 ; 60.4 60.8 60.6 59.7 28 00.4 59.6 29 .60.2 60.4 60.0 , 59.7 30 : 60.6^ 31 60.8 60.0 58.2 1917-18. 1 57.1 57.0 I 57.8 2 56.6 S 57.1 58.5 4 57.0! 58.2 57.7 57.7 57.2 57.1 57.2 58.6 56.0 6 57.2 57.2 56.5 7 57.0; 57.7 55.9 8 57.1 58.6 58.2 9 57.0 1 57. 4 57.2 57.2 56.5 ; 10 58.5 58.2 57.6 65.9 11. 57.0 57.0 57.2 12 58.5 "58.'4' 57.0 5G.4 13 5>;.o 58.1 55.8 14 57.0 15 57.1 57.6 16 57.0 57.0 58.2 58.4 57.0 50.4 17 58.0 55.8 18 . 57.5 19 57.0 57.0 58.4 57.9 56.9 56.2 20 57.2 57.0 21 57.5 56.9 '"5G.'2* 55.7 22 ... 58.6 58.6 23 57.1 58.3 21 55.6 25 57.2 58.7 58.3 57.9 57.4 56.8 26 57.2 57.1 55.5 27 58.7 58.1 28 57.0 67.2 57.8 57.8 29 57.1 57.1 57.3 53.7 30 57.0 58.8 56.1 31 324 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. TEMESCAL CREEK NEAR ELSINORE, CALIF. Location. — In La Laguna grant at private bridge 1^- miles northwest of Elsinore, Riverside County, and 2 miles below outlet of Elsinore Lake. Drainage area. — Not measured. Elsinore Lake overflows only during years of heavy rainfall. Elevation. — About 1,250 feet above sea level. Records available. — April 10, 1916, to September 30, 1918. Gage. — Vertical staff fastened to left bridge abutment near downstream end. Discharge measurements. — Made from bridge at gage or by wading. Channel and control. — Sand; not permanent. Banks are high and not subject to overflow. About January 20, 1917, the channel at outlet was deepened, per- mitting more water to leave Elsinore Lake. March 8 to June 30, 1917, weeds and moss were growing in channel. Diversions. — See San Jacinto River near Elsinore. Water is pumped from wells in Ferris Valley for irrigation. Regulation. — Water is stored in Hemet reservoir on South Fork of San Jacinto River. Accuracy.— Stage-discharge permanent during 1916 but not in 1917 on account of growth of weeds and moss in channel. Well-defined rating curve used April 10, 1916, to March 7, 1917. Gage read to hundredths, but not every day. Daily dis- charge before March 7, 1917, ascertained by applying gage height to rating table; after March 7, by shifting-control method. Results for 1916, good; 1917, fair. No flow during 1918. Discharge measurements of Temescal Creek at Elsinore, Calif., for 1916-17. Date. Made by— beight. Dis- charge. Date. Made by- Gage height. Dis- charge. 1916. Feb. 13 F. C. Ebert FccL Scc.-ft. a 48 71 M43 179 170 126 99 52 42 20 16 1916. Aug. 10 Dec. 7 1917. Jan. 17 Feb. 13 Mar. 7 16 26 Apr. 21 May 20 F. C. Ebeirt... .. . Feet. .81 .79 .50 1.04 L30 L43 1.51 L56 1.28 ^■t. 24 Mar. 9 do McOlasban and Ebert .....do F. C. Ebert... 2.4 22 F.C. Ebert Apr. 10 28 May 6 26 June 9 do do do McGlashan and Ebert.. F.C. Ebert 3.90 3.31 2.82 1.99 1.75 1.29 L19 c .2 do.... do do do 1 McGlashan and Ebert.. F. C. Ebert 6.0 It 13 .13 July 11 20 do do 9.1 3.5 « Measured 1,000 feet below Lake Elsinore. fc Measured 1 mile below Lake Elsinore. c Estimated. SANTA ANA KIVER BASIN. 325 Daily discharge, in sccond-fect, of Tcmcstal Creek near Elsinore, Calif., for 1916-17. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July.^ Aug. Sept. 1916. 1 113 112 112 106 104 102 a 93 84 82 82 84 73 72 69 a 68 67 63 a 62 61 60 a 58 56 54 54 53 53 50 49 48 46 8.5 08 8 o8 8 a8 8 8 7 7 o7 6.5 6.5 06 6 5.5 5 05 5 3.5 3.0 2.5 2.5 a 2. 5 2.5 02.4 a 2. 2 2.0 01.5 1.0 .8 45 44 44 43 42 41 41 40 40 40 38 o38 37 37 30 35 34 32 31 30 29 28 28 27 26 25 25 24 23 22 .8 0.9 ol.l 1.2 .8 .5 «22 21 20 21 21 21 20 23 «22 20 20 19 19 18 17 17 17 17 17 17 16 15 ol5 15 15 15 13 .012 12 11 010 010 9.5 9.0 8.0 7.0 4.9 4.5 o 4.0 3.5 3.0 «2.6 2.2 2.0 1.7 01.4 1.2 1.-1 1.0 4".l o2.2 .3 .3 .3 .3 .3 .2 .2 .2 .2 .2 fflO.2 2 .1 3 0.2 4 .4 .5 .4 Q .4 7 .2 8 .2 9 143 i67'" J166 ]66 159 159 159 1154 150 148 146 142 139 139 140 138 136 135 129 129 128 al20 .2 10 a.2 11 a. 2 12 .2 13 48 ;2 14 .2 15 .3 16 .3 17 0.3 18 1 .3 19 1 .3 20 .3 21 .3 22 179 .3 23 .3 24 71 a. 3 25 .3 26 .3 27 .3 28 0.3 29 .3 30 .3 31 191&-17. 1 O0.4 ,4 .4 .4 .4 .4 a. 4 a .4 .4 .4 ft. 4 .4 .5 .5 a. 5 .5 .5 .5 is .9 a 2.0 3.1 3.7 5 5 4.9 a 4. 8 4.6 4.6 3.1 3.1 4.0 4.0 a 4. 2 4.3 4.3 3.4 3.4 a 3. 2 3.1 a 3. 2 a 3. 3 3.4 4.0 4.0 4.0 4.0 4.4 4.0 4.3 4.3 3.7 3.7 3.7 a 3. 5 a 3. 3 3.1 3.2 2.8 2.8 2.8 3.0 3.1 3.1 3.1 2.3 2.3 2.3 a 2. 2 2.1 2.1 2.1 2.1 2.1 2.1 «2.0 1.8 1.8 1.6 1.6 .8 1.0 a. 9 .8 .2 .2 .2 .2 .2 a. 2 .3 .3 .3 .3 .2 .2 a. 2 .2 .2 .2 .2 .3 ft. 3 .3 .3 .2 .3 a 3. 4 6.5 a 6.5 6.5 6.5 6.5 6.5 6.5 6.5 a 6. 5 6.5 6.5 6.5 6.5 6.5 n 6.5 a 6.5 6.5 6.5 6.5 6 6 6 a& 6 6 6 a? 7.5 7.5 a7.5 7.5 7.5 o8 8.5 8.5 ag 9.5 9.5 10 10 alO 10 9.5 a 10 11 11 12 a 12 13 13 13 12 12 12 13 13 a 14 14 14 ol4 13 13 13 ol3 13 13 13 13 13 12 ol2 11 11 11 11 oil 11 all 11 11 11 11 11 a 10 olO 10 10 10 9 a9 9 a9 9 9 a9 9.5 10 a 10 o9 9 2... 1 3 ! 4. 6 i 6.. I 7 a. 4 .2 a. 2 a. 2 .2 .3 0.3 .3 1 8 9 1 10 11 12 13 14 15 .... .3 .4 a. 4 0.3 .3 .2 0.2 .3 .2 0.2 .2 16 17 18 19 20 21 22 23 24 25 26 27 28 . . 29 30 31 o Gage not read, discharge interpolated. Note.— No fiow July 1, 1917, to Sept. 30, 1918. 326 SURFACE WATER OE PACIFIC SLOPE, SOUTHERN CALIFORE"IA. Monthly discharge of Temescal Creels near Elsinore, Calif., for 1916-17. Month. Discharge in second- Run-off (total in acre- feet). Month. Discharge in second- feet. Run-off (total in Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1916. April 10-30..-. May 167 113 1.5 23 10 .4 120 46 22 10 .2 .1 145 73.1 34.2 17.4 2.78 .27 6,040 4,490 2,040 1,070 171 16 1916-17. December January February March 3.1 6.5 10 14 12 8.5 1.2 .0 .0 .0 .2 .2 6 9.5 9 .8 .1 .0 .0 .0 1.71 2.77 7.18 12.3 10.2 5.08 .363 .00 .00 .00 103 170 399 July. ■ 750 April 607 September 312 21.6 The poriod 13,800 July August September The year . . .0 .0 1916-17. (Jctober November 4.4 .4 2.S 1.71 3.67 105 218 14 .0 3.73 2,690 NoTS. — No flow during year 1917-18. TEMESCAL CREEK NEAR RINCON, CAIilF. Temescal Creek rises in the extreme southwest corner of Eiversido County, flows in a general northerly direction, and enters Santa Ana River 2 i miles above Rincon and just above the lower narrows of the Santa Ana. Its smaller tributaries have their sources on the eastern slope of the Santa Ana Mountains. San Jacinto River discharges into Lake Elsinore. During years of heavy rainfall this lake over- flows and the surplus water finds its way into Temescal Creek. The water of Temescal Creek and of its tributary, Coldwater Creek, is used for irrigation in the vicinity of Corona. A series of measure- ments of Temescal and Coldwater creeks have been made by F. Rolfe and are given below. During the dry years covered by the following measurements, there was no surface flow of Temescal Creek. The water flow- ing in the upper pipe line of the Temescal Land & Water Co. in- cludes the principal part of the flow of Coldwater Creek and Temescal Hot Springs, augmented by water pumped from wells in Temescal Valley. Discharge measurements of Temescal Creek at upper pipe line, Temescal Land & Water Co., Temescal, Riverside County, Calif., for 1899. Date. Made ])y— Dis- charge. Date. Made by — Dis- charge. Jan. 4 S. G. Bennett Scc.-fect. 0.99 .74 Apr. 29 May 6 13 18 30 June 9 16 Julv 10 21 F. Rolfe Scc.-fect. 3.22 27 F. Rolfe... . . ..do 2.80 Feb. 4 ..do do 4.02 11 do 1 .87 do 3.f.7 do 4.21 18 do 4.01 24 ...do 3.37 .do 3-36 Mar. 3 12 do .....do 3.87 5.10 3.56 3.74 4.16 2.93 3.71 do do 3.52 3.21 16 do .do 3.20 25 .do .do 3.67 31 Apr. 14 22 do do do do 1.48 4.26 do do 3.84 SANTA AIsTA EIVBR BASIIsT. 327 Discharge measurements of Temescal Creek at lower jApe line, Temescal Land & Water Co., Temescal, Riverside County, Calif., for 1899. (Made by F. Roife.] Date. Dis- charge. Date. Dis- charge. Date. Dis- charge. Scc.-feci. Sec-feet. Sec-feet. Jan 28 0,66 Mar 25 2.91 Juno 9 3.10 Feb 1 .00 31 3.42 15 2.36 11 .31 Apr 14 .89 July 4 2.87 15 1.39 22 2.28 19 2.03 20 1.56 29 2.28 25 2.49 Mar 4 4.22 May 6 4.48 Aug 5 1.12 12 3.55 13 2.55 11 2.40 18 2.69 30 3.08 21 2.65 COLDWATER CREEK. Discharge measurements of Coldwater Creek, Riverside County, one-fifth mile ahove dam., for 1899. [MadebyF.Rolfe.] Date. Dis- charge. Date. Dis- charge. Date. Dis- charge. Sec-feet. Sec. -feet. Sec. -feet. Jan 4 18 0.82 1.43 Mar 12 0.71 1.60 May 13 0.37 17 .21 27 .84 25 1.18 17 .21 Feb 3 .99 31 .84 29 .27 11 .97 Apr 14 0.68 31 .38 18 .78 15 .62 31 .30 21 ; . 94 21 .26 June 5 .39 Mar 11 .92 26 .38 7 .22 SAN ANTONIO CREEK NEAR CLAREMONT, CALIF. Location.— In NW. \ SE. \ sec. 36, T. 2 N., R. 8 W., at highway bridge about half a mile above Southern California Edison €o. 's power house (Sierra plant), about 4 miles above mouth of canyon, and 8 miles northeast of Claremont, Los Angeles County, Braixage area. — 16.9 square miles (measured on topographic map.) Elevation. — ^About 3,200 feet above sea level. Records available. — January 25, 1917, to September 30, 1918, (Discharge meas- urements only May 31 to September 4, 1916.) Gage. — Gurley graph water-stage recorder on left bank at north end of highway bridge. Discharge measurements. — ^Made from highway bridge or by wading near gage. Channel and control. — Coarse gravel and sm^all bouldere; shifting during high stages. One channel except at extremely high floods when left bank is over- flowed. Extremes of discharge. — 1917-1918; Maximum stage recorded from water-stage re- corder, 4. 00 feet at 3 p. m. March 7, 1918 (discharge, 362 second-feet); minimum stage recorded from water-stage recorder, 0.93 foot at 4 p, m., August 26, 1918 (discharge, 0. 5 second-foot). Diversions. — The Southern California Edison Co. diverts v/ater for power devel- opment above the station. (See record, p. 346. ) Regulation. — None, except as indicated above. Accuracy. — Stage-discharge relation not permanent during period. Rating curves fairly well defined. The operation of the water-stage recorder was satisfactory during the period. Dail}^ discharge ascertained by applying to the rating table mean daily gage height determined by inspecting recorder graph. Records good. 328 SUKFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Cooperation. — Southern California Edison Co. furnished ohserver for water-stage recorder. Cucamonga and San Antonio creeks rise in the San Antonio Mountains, Sierra Madre, and flow southward into the Santa Ana Valley, where they are lost in the sand. Discharge measurements of San Antonio Creek near Claremont, Calif., for 1916-1918. 1916. May 31 June 13 27 July 3 Aug. 12 Sept. 4 Oct. 11 1917. Feb. 19 24 Mar. 8 30 5 10 21 2 9 26 July 19 Aug. 28 Apr. May Made by— J. C. Dort do H. J. Tompkins. . J. C. Dort H. J. Tompkins. . do J.C. Dort do H. J. Tompkins. . ,do- Dort and Tompkins.. J. G. Dort H. J. Tompkins do J.C. Dort H. J. Tomukins do.... do Tompkins and Campbell H. J. Tompkins Gage height. 0.69 .84 1.48 1.53 1.36 1.40 1.40 1.19 .56 Dis- charge. Sec-ft. 14 7.7 4.4 3.4 1.0 1.0 2.1 4.5 5.2 17 20 25 15 18 1917. Sept. 18 Oct. 25 Dec. 15 1918. Mar. 9 May 14 23 June 1 21 July 19 Aug. 25 Sept. 18 H. J. Tompkins . do do H. J. Tompkins. . C. W. Sopp H. J. Tompkins. . do F.C. Ebert H. J. Tompkins.. C. W. Sopp H. J. Tompkins.. C. W. Sopp H. J. Tompkins. . do C. W. Sopp H.J. Tompkins. . do C. W. Sopp H. J. Tompkins. . F.C. Ebert Gage Dis- height. charge. Feet. 0.52 .56 .58 .72 2.47 2.02 3.14 2.39 2.08 2.06 1.90 1.82 1.73 1.60 1.48 1.34 1.04 .98 .94 .96 Sec-ft. 0.6 39 41 I 35 . I 28 '■ 19 i 15 11 5.8 1.8 .85 .7 . Daily discharge, in second-feet, of San . intonio CreeJc near Claremont, Calif, for 1917-18. Day. Oct. Nov. Dec, Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1917. 1 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.2 2.2 2.1 2.1 2.5 2.3 2.1 2.1 2.2 4.3 4.4 4.0 7 7 7 6 6.5 6.5 6.5 6 6 6 6 6 6.5 7 8 6.5 6 6.5 6.5 6.5 7 7 7.5 7.5 8 8.5 9 8.5 9 10 11 13 15 17 20 20 20 21 21 21 21 21 22 25 24 22 22 21 21 21 27 22 21 20 18 16 16 16 19 22 22 24 22 22 21 22 20 19 20 19 18 18 18 18 18 17 15 15 15 15 14 14 18 16 15 13 12 12 12 12 12 11 10 10 9.5 9 8 8 8.5 8.5 7.5 7 7 7 6.5 6.5 6 5.5 .5.5 6 5 5 4.5 4.0 3.5 3.3 3.2 3.0 3.0 2.9 2.8 2.6 2.3 2.2 1.8 1.8 1.8' 1.8 1.5 1.4 1.3 1.3 1.3 1.3 1.3 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.1 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.7 1.3 1.3 1.2 1.2 1.2 1.1 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 .9 .9 .9 .9 .9 .9 .9 .9 .9 0.9 2 . ... .9 3 .9 4 .9 5 .9 6 .9 7 .9 8 .9 9 .9 10 .8 11 .8 12 .8 13 .8 14 .7 15 .7 16. . .8 17 .9 18 .8 19 .8 20 .9 21 .9 22 .9 23.. .9 24 1.0 25 2.5 2.5 2.5 2.4 2.4 2.4 2.3 1.0 26 1.0 27 .9 28 .8 29 1 " .8 30... j 1.0 31 1 Note,— Water-stage recorder not in operation Jan. 25 to Feb. 18— discharge estimated from record of flow COD San Dimas Creek, SANTA ANA EIVER BASIN. 329 Daily discharge, insccond-ffct, of San Antonio Creek near Claremont, Calif. Jor 1917-18— Continued. Day. Oct. Nov. Dee. Jan. Feb. Mar. Apr. Mtiy. June. July. Aug. Sept. 1917-18. 1 l.G 1.1 1.1 1.1 1.1 1.2 1.2 1.1 1.1 1.0 1.1 1.1 1.2 1.2 1.1 1.1 1.1 1.1 1.0 1.0 .9 .9 .8 .8 .7 .8 .8 .8 .9 .9 .8 0.9 .9 .9 .9 1.0 1.2 1.1 1.1 1.0 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 0.9 .9 .9 .9 .9 .9 .9 .8 .8 .8 .8 .7 .7 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 0.8 .8 .8 .8 .8 .8 .7 .7 .8 .8 .8 .8 .8 .9 .9 .9 .9 .9 .9 .9 .9 .8 .8 .8 1.1 1.0 1.0 .9 .8 .8 .8 0.8 .8 .8 .8 .8 .8 .8 .8 .9 .9 .9 .9 .9 .9 .9 .9 1.1 1.1 1:J 2.8 10 7 3.6 3.. 3.8 3.4 2.7 2.2 1.8 1.8 1.7 1.8 2.4 133 96 45 94 179 184 175 165 150 130 110 96 89 88 69 65 61 57 53 50 49 46 45 43 43 42 41 41 41 41 40 37 35 32 31 30 30 31 30 29 27 ■ 26 25 26 25 25 24 24 24 24 24 24 25 24 24 22 22 22 20 21 21 20 20 20 20 23 18 17 15 15 14 \l i? 11 11 10 10 10 9.5 9 10 9.5 8.5 7.5 6.5 6 5.5 4.9 4.5 4.3 3.9 3.7 3.5 3.0 2.5 2.3 2.1 1.7 2.0 1.7 1.7 1.7 1.7 1.5 1.4 1.2 1.2 1.1 1.1 1.0 .9 .9 .9 0.9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .9 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 0.8 .8 .•8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .7 .6 .6 .6 .7 .7 .7 0.7 2 .7 3 .7 4 .7 5 .7 6 .7 7 .7 8 .7 9 .7 10 .7 11 - .. .7 12 .7 13 .8 14 .8 15 .8 16 .8 17 .8 18. .8 19 .8 20 .8 21 .8 22 .8 23 .8 24 .. .8 25 .8 26 .8 27 •t) 28 .9 29 .9 30 .8 31 - Monthly discharge of San Antonio Creek near Claremont, Calif., for 1917-18. 1917. January 25-31... February March April May June July August September The period. Discharge in second-feet mum. mum. 2.5 7 20 27 22 8.5 1.8 1.2 1.0 2.3 2.1 6 16 9 1.8 1.0 2.43 3.11 8.42 21.0 15.0 4.95 1.24 .98 .87 Run-off (total acre- feet). 33.7 173 518 1,250 922 295 76.2 60.3 51.8 3,380 1917-18. October November. . . December... January February March April May June July August September . . The year. Discharge in second-feet Maxi- mum. 1.2 1.2 .9 1.1 10 184 42 23 7 Mini- mum. 0.8 .9 .7 .7 .8 1.7 24 7.5 9. .8 .6 .7 1.00 .93 .82 .85 1.95 75.1 30.1 1.5.0 2.71 .84 .77 .77 11.0 Rim-oiI (total acre- feet). 61.5 65.3 50.4 52.3 108 4,620 1,790 922 161 51.6 47.3 330 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORl^IA. Daily discharge, in second-feet, of San Antonio Creeh and Southern California Edison Co.^s canal near Claremont, Calif., for 1917-18. Apr. May. June. July. 43 29 21 41 29 21 40 30 20 41 30 20 40 28 20 39 28 20 39 28 20 39 28 20 39 28 19 39 28 19 38 27 19 36 26 19 36 26 19 36 27 19 36 26 18 35 26 18 35 24 18 39 23 18 37 22 18 36 22 17 34 22 17 33 22 17 33 22 17 33 22 17 33 22 16 33 22 17 32 21 20 31 21 19 31 21 18 30 21 18 30 18 41 26 20 41 26 20 41 25 19 39 25 19 40 24 19 40 24 19 39 24 19 39 23 19 39 23 18 39 23 18 42 22 18 37 22 18 36 22 18 34 22 18 34 21 18 33 21 17 33 21 17 32 21 17 31 21 17 30 21 17 30 21 16 30 21 16 29 20 17 29 20 16 29 20 16 29 20 16 28 20 16 29 20 16 29 20 16 28 20 15 27 15 Aug. 11 I 10 j 10 10 10 10 10 10 10 10 10 10 9.5 10 9.5 9.5 9.5 10 9.5 9.5 9.5 8.5 9 8.5 8.5 8.5 9 8.5 8.5 8 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 9 153 116 199 204 195 185 170 150 130 116 109 108 Note.— See page 346 for daily discharge of Southern California Edison Co.'s canal. SANTA ANA RIVER BASIN. 831 Monthly discharge of San Ardmiio Creek and Southern California Edison Co.^ 7iear Claremont, Calif., for 1917-18. canal Discharge in second- feet. Run-off (total in acre- l Maxi- Mini- Mean. feet). mum. mum. 16 15 15.6 217 28 15 18.0 1,000 11 27 29.5 1,810 46 37 42.0 2,500 43 30 36.0 2,210 30 21 25.0 1,490 21 16 18.6 1,140 17 13 15.2 935 13 11 12.3 732 12, 000 Discharge in second- | feet. Maxi- Mini- mum. mum. 12 10 11.0 12 10 10.1 10 9 9.53 9 8.5 8.87 26 8 10.6 201 11 93.1 61 43 40.1 42 27 34.1 26 20 22.0 20 15 17.4 16 12 14.0 12 11 11.7 201 8 24.4 Run-Off (total in acre- feet). 1917. Jamiary 25-31 — February March April May June July August September. . Tho period 1917-iS. October November December January February March April May Juiie July August September The year, 676 601 586 545 589 5, 720 2,920 2,100 1,310 1,070 861 SAJSr AHTONIO CREES: lyTEAB UPLAND, CALIF. Location. — In SW. ^sec. 30, T. 2 N., R. 8 W., below Southern California Edison Co.'s power house, about 4 miles above mouth of canyon, and 8 miles norfhwest of Upland, San Bernardino County. Drainage area. — Not measured. Elevation. — About 2,700 feet a]x)ve sea level. Records available. — March 11, 1901 to Januaiy, 31, 1917. Discharge. — Determined from gage-height record obtained at 10-foot rectangular weir in tailrace; excess water flowing over diverting dam is estimated. Extremes op discharge. — 1901-1917: Maximum mean daily discharge reported, 607 second-feet February 21, 1914 (no record for flood of January, 1916); minimum mean daily discharge reported, 3.4 second-feet February 29, 1904. Diversions. — No information. Regulation. — No information. Accuracy. — Capacity of power canal is about 21 second-feet. Records excellent when flow of creek does not exceed capacity of canal. Cooperation.— Daily discharge record furnished by Pacific Light & Power Corpora- tion, through H. A. Barre, chief engineer, and Southern California Edison Co. 332 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of San Antonio Creek near Upland, Calif., for 1901-1917, Day. Apr. May. June. Juiy. Aug. 18 17 14 10 18 17 14 10 17 16 14 9.6 17 16 13 9.9 16 16 14 9.6 13 16 14 9-9 17 16 14 9.9 17 16 13 9.9 17 16 13 9.7 16 16 13 9.7 16 16 13 9.6 16 16 12 9.9 16 16 12 9.7 16 16 12 9.7 16 16 12 9.G 16 16 12 9.3 16 12 9.3 16 12 9.3 16 12 9.3 16 12 9.3 16 12 9.3 16 12 9.3 15 12 9.3 16 12 9.3 16 12 9.3 ol7 14 12 8.7 14 12 8.7 14 11 8.7 14 11 8.7 a 17 14 11 8.7 11 8.7 1901. 1 2 3 4 . ... 6. . . . . . 7 8 9 10 n . . 5.4 12 5.6 33 5.6 14. . 5.6 15 5.4 16 5.7 37 5.4 18 5.6 19 . . .. 5.4 20 5.4 21 5.6 22 : 5.6 23 5.6 24...... 5.6 25 5.6 26 5.6 27 5.6 28 .... . 5.4 29 5.6 30 5.5 31 5.4 5.6 5.6 5.5 5.4 5.6 5.3 5.5 5.4 5.4 5.4 5.4 5.4 5.4 5. 5 5.5 5.0 5.0 5.0 5.1 5.1 5.3 5.2 16 16 16 16 16 16 16 16 Day. 9.. 10.. 19.. 20.. 22.. 23.. 28.. 29.. 30.. 31.. 6.8 6.8 7.2 7.2 7.2 7.2 7.2 8.7 7.7 7.7 7.7 7.4 7.2 ■7.2 7.2 7.2 7.2 7.2 7.2 7.7 7.2 7.2 7.2 6.8 6.8 6.5 6.5 6.5 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.3 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0. 6.0 6.0 6.0 6.0 6,0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.3 6.0 6.0 6.0 6.0 6.3 6.3 6.3 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 5.7 5.7 5.7 5.7 5.7 5.7 5.7 5.7 5.7 5.7 5.7 5.7 5.7 5.7 7.1 6.8 6.8 7.1 7.4 7.4 7.4 7.4 7.4 7.4 7.4 7.4 7.4 7.7 7.7 7.7 7.4 7.4 8.3 8.3 8.3 8.3 8.3 8.3 8.3 Apr. 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 8.3 9.0 9.0 9.0 9.0 9.0 9.3 9.3 9.0 9.0 9.0 8.7 8.3 8.0 8.0 8.0 7.7 7.7 6.5: 6.5 6.5 July. 6.5 6.6 6.6 6.6 6.6 6.6 6.6 6.3 6.3 6.3 6.3 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 Aug. 6.1 5.7 5.7 5.7 5.7 5.7 5.4 6.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.4 5.2 5.2 5.2 5.2 5.2 5.2 5.2 « Interpolated by United States Geological Survey. SANTA ANA KIVER BASIN. 333 . Daily disdmnje^insecmid-feety of San Antonio Creek near Upland, Calif., for 1901-1917-^ Continued. Da3^. )et. Xov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 4.6 4.2 4.4 4.4 6.3 6.3 200 16 16 18 12 ^.9 4.6 4.2 4.4 4.4 6.3 6.3 160 16 16 18 12 9.9 4.6 4.2 4.4 4.4 6.0 6.0 16 16 17 12 9.7 4.6 4.2 4.4 4.4 6.0 6.3 16 16 17 12 9.7 4.6 4.2 4.4 4.4 6.0 7.4 14 16 16 17 12 9:7 4.6 4.2 4.4 4.4 6.0 7.1 16 16 16 17 12 9.3 4.6 4.2 4.4 4.4 6.0 7.1 16 Ifl 16 17 11 9.3 4.6 4.2 4.4 4.4 6.0 7.1 16 16 16 17 11 9:3 4.6 4.6 4.4 4.4 6.0 7.1 16 16 16 17 11 9.3 4.6 4.4 4.4 4.4 6.0 7.1 16 16 20 17 11 9.3 4.6 4.4 4.4 4.4 6.0 7.1 16 16 20 16 11 9.3 4.6 4.9 4.4 4.4 6.0 7.1 16- 16 20 16 11 9:3 4.6 4,4 4.6 4.4 6.0 7.1 16 16 20 16 11 9.3 4.6 4.4 4.4 4.4 6.0 7.1 16 16 20 16 11 9.3 4.6 4.4 4.4 4.4 6.0 7.1 16 16 20 Ifi 11 9.3 4.6 4.4 4.4 4.4 6.0 7.1 16 16 20 16 11 9;- 3 4.4 4.4 4.4 4.4 6.0 7.1 16 16 20 16 11 9.0 4.4 4.4 4.6 4.4 6.0 7.1 16 16 20 16 11 9:0 4.4 4.4 4.6 4.4 6.0 7.1 16 16 29 16 11 9.3 4.4 4.4 4.6 4.4 6.0 7.1 16 20 16 11 9.0 4.4 4.4 4.6 4.4 6.0 9.0 16 20 16 11 9.0 4.4 4.4 4.6 4.4 6.0 7.1 16 20 16 . 11 9:0 4.4 4.4 4.6 4.4 6.0 7.1 16 20 15 11 9:0 4.4 4.4 4.6 4.4 6.0 7.1 16 20 14 11 9.0 4.4 4.4 4.6 4.4 6.0 9.0 16 16 19 13 11 9:0 4.4 4.4 4.4 4.4 6.0 9.0 16 16 19 13 11 9.0 4.4 4.4 4.4 5.7 6.0 8.7 16 16 19 13 11 9.0 4.4 4.4 4.4 5.7 6.0 8.7 16 16 19 13 11 9.-0 4 4 4.4 4.4 4.4 4.4 4.4 6.3 6.3 6.3 16 16 16 16 16 19 19 13 13 13 10 10 9.9 9.0 4 4 9.0 4.4 8.7 7.4 7.1 6.6 6.3 7.4 11.0 15.0 14 9.3 7.4 6.8 H.7 7.4 7.1 6.6 6.3 7.4 11.0 15.0 14 9.3 7.1 6.6 8.7 7.4 7.1 6.6 6.3 7.1 11.0 15. 14 9.3 7.1 6.6 8.7 7.4 7.1 6.6 6.3 7.1 11.0 15.0 14 9.3 7.1 6.6 8.7 7.4 7.1 6.6 6.3 7.1 11.0 15.0 13 9.3 7.1 6.6 8.7 7.4 7.1 6.6 6.6 6.8 11.0 15 13 9.3 7.1 6.6 8.7 7.4 7.1 6.6 6.3 6.8 11.0 15 • 12 9.3 7.1 6.6 8.7 7.4 7.1 6.6 6.3 6.8 11.0 15 12 9.3 7.1 6.C 8.7 7.4 7.1 6.6 6.3 6.8 11.0 15 12 9.3 7.1 6.0 8.7 7.4 7.1 6.6 6.3 6.8 11.0 16 12 9.3 7.1 6.6 8.7 7.4 7.1 6.6 6.3 8.0 11.0 17 12 9.3 7.1 6.6 8.7 7.4 7.1 6.6 6.3 7.1 11.0 17 12 9.3 7.1 6.S 7.4 7.4 7.1 6.6 6.3 7.1 11.0 17 11 9.0 7.1 6.6 7.4 7.4 7.1 6.6 6.3 7.1 11 17 11 7.7 7.1 6.6 7.4 7.4 6.8 6.6 6.0 7.1 11.0 16 11 7.7 8.0 6.3 7.4 7.4 6.8 6.6 6.6 7.1 13.0 16 11 7.7 8.3 0.3 7,4 7,4 6.0 6.6 6.6 7.1 13.0 16 11 7.7 8.3 6.C 7.4 7.1 6.8 6.6 6.6 7.1 13.0 16 11 7.7 8.0 6.C 7.4 7.1 6.8 6.6 6.6 7.1 13.0 16 11 7.7 8.0 6.i 8.0 7.1 6.8 6.6 6.3 7.1 15.0 16 11 7.7 7.7 6:3 8.0 7.1 6.8 6.6 6.3 7.1 15.0 16 11 7.7 7.7 6.3 ".4 7.1 6.8 6.6 6.3 7.1 15.0 15 10 7.7 7.7 6.i 7.4 7.1 6.8 6.6 6.3 17.0 15.0 15 10 7.7 7.7 b.c V.4 7 1 6.8 6.6 6.3 10.0 14.0 15 10 7.7 7.5 6.£ V.4 /.I 6.8 6.6 6.3 10.0 14.0 15 10 ■ 7.7 7.5 6.3 7.4 7.1 6.8 6.6 6.3 9.3 14.0 15 10 7 5 7.5 6.3 7.4 7.1 6.8 6.3 6.3 9.3 14.0 15 11 7.5 7.5 6A V.4 7.1 6.6 6.6 8.4 9.3 14.0 15 11 7.5 7.5 6.C 7.4 7.1 6.6 6.6 3.4 9.7 14.0 15 a 10 <.o 7.5 6. J 7.4 7.1 6. '6 6.0 9.7 14.0 15 a 10 7.5 6.8 6.( 7.4 CO 6.3- 11.0 15 7.5 6.8 o Interpolated by United States Geological Survey. 334 SURFACE WATER OE PACIFIC SLOPE, SOUTHERN C^ALIFORNIA. Daily discharge, in second-fed, of San Antonio Creek near Upland, Calif. , for 1901-1917- Continued . 11 11 all 19 120 280 280 200 a300 400 300 16 17 17 16 16 16 16 16 60 300 160 160 160 160 240 200 200 180 180 160 160 160 240 260 300 260 250 1 Apr. 240 220 180 170 160 160 160 160 140 130 120 120 120 110 100 100 100 100 90 90 90 90 :May. 80 80- 100 110 110 110 «34 34 32 32 32 32 32 32 32 100 100 100 100 100 100 100 100 90 90 Aug. a Interpolated bj United States Geological Suryey. SAITTA AE^A EIVEK BASIN, 335 Dailri dischurge, in second-feet, of San Antonio Creel: near Upland, Calif., for 1901-1917- Continued . Apr. Jvily. 16 17 17 17 18 a 18 18 18 11 11 11 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 9.9 9.7 9.7 12 13 17 15 60 160 160 140 130 130 120 120 120 110 100 100 100 100 100 100 100 160 140 140 140 160 160 160 150 150 140 130 130 130 130 130 130 130 130 130 130 120 120 120 110 110 110 110 110 110 110 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 a luterpolated hy United Slates G«otogic3i Sarvey. 3^86 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge , in second-feet, of San Antonio Creek near Upland, Calif, for 1901-1917 — Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1908-9. 1 9.0 9.0 9.0 9.0 9.0 9.0 9.0 9.0 8.8 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 S.5 8.5 8.5 8.5 8.5 8.5 12 12 12 12 12 12 12 12 12 12 12 12 12 11 11 11 11 11 11 11 12 12 12 11 11 11 11 11 11 11 11 8.5 8.5 8.5 8.5 8.0 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7,9 7.9 7.9 7.9 7.9 7.9 11 11 11 11 10 10 10 10 10 11 11 11 11 11 12 11 11 11 11 11 11 11 11 u 11 11 11 11 11 7.9 a 8.2 8.5 8.5 8.2 8.2 8.2 8.2 8.2 8.2 7.9 8.4 8.4 8.4 8.4 8.4 8.4 8.5 8.5 8.5 8.5 8.5 8.4 8.4 8,2 8.0 7.9 7.9 7.9 7.9 7.9 11 11 11 11 11 11 11 11 15 23 21 18 18 18 18 18 18 a 18 18 18 20 19 20 20 20 18 18 17 17 17 27 7.9 7.9 7.9 7.9 7.9 7.9 7.9 7.9 8.0 8.0 8.0 8.1 8.2 8.2 8.1 8.1 8.0 8.0 8.0 8.0 8.7 121 51 130 45 45 45 45 37 35 35 '2ii"" 211 211 211 211 201 201 201 181 171 171 151 141 131 121 91 81 71 71 81 81 81 71 71 61 35 33 31 35 35 35 41 61 61 61 61 81 101 101 101 101 101 101 101 91 91 91 81 81 81 81 81 81 51 51 51 51 51 50 50 50 49 49 49 49 49 49 47 46 45 45 45 46 46 37 36 35 35 34 34 33 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 80 81 101 101 101 101 101 101 101 101 101 101 33 31 28 28 26 25 25 25 25 25 24 24 24 24 24 24 24 25 24 25 24 25 25 25 25 25 25 27 27 27 27 101 101 101 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 27 26 26 26 2« 26 26 26 25 25 25 26 26 26 25 25 25 25 25 24 24 24 23 23 22 22 22 22 22 22 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 81 22 22 22 22 22 22 22 21 21 21 21 20 20 20 20 20 20 20 19 19 19 19 19 19 18 71 71 61 61 57 67 57 57 57 57 51 51 51 51 51 45 41 41 41 41 41 39 39 33 33 31 31 31 29 16 16 16 16 16 16 16 16 16 16 15 16 15 16 16 16 15 15 15 15 15 15 15 15 15 15 14 14 14 14 27 27 27 27 27 27 27 27 27 27 26 25 23 23 22 23 23 23 23 23 22 21 21 21 21 21 21 21 21 20 18 14 14 14 14 14 13 13 13 13 13 13 13 13 13 13 12 12 12 12 12 12 12 12 12 11 11 11 11 11 11 11 19 19 18 17 17 17 17 17 17 17 17 17 17 17 16 16 16 16 16 16 16 16 16 16 15 15 15 15 15 15 15 11 11 11 11 11 10 10 10 10 10 10 10 10 10 10 10 10 10 9.6 10 9.9 9.9 9.9 9.9 9.9 9.9 9.9 9.9 9.9 8.6 9.0 15 2 15 3 15 4 15 5 15 6 15 14 8 13 9 13 10 13 1] 13 12 13 13 13 14 13 1,5 13 ]() ■14 • 17.. 12 18 12 19 . .. 12 20 12 21 12 22 12 23 12 24. 12 25 12 26 12 27 12 2S . -. 12 29 12 30 12 31 1909-10. 1 9.0 2 9.0 3 . .. 9,0 4 9.0 5 9.0 6 9.0 7 9.0 8 8.0 9 8.0 10 8.0 11 8.4 12 8.4 13 8.4 14 .... 8.4 15 ■ 8.4 16 ■ 8.4 17 8.4 18 8.4 19 8.4 20 a4 21 . . 8.4 22 7.8 23 7.8 24 7.4 25 7.8 28 . 7.8 27 7.8 28 7.8 29 7.4 30 7.8 31 interpolated by United States Geological Survey. SANTA ANA EIVEE BASIN. 337 Daily discharge, in s(cond-fcct, of San Antonio Creeh near Upland, Calif., for 1901-1917- Continued. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. 7.8 7.2 7.4 7.0 33 35 41 36 29 23 19 7.8 7.6 7.4 7.0 31 37 43 36 29 23 19 7.8 7.6 7.4 7.0 27 39 41 36 29 23 19 7.8 7.6 7.4 7.0 39 43 41 36 29 23 19 7.8 7.4 7.4 6.0 41 45 41 35 29 22 19 7.4 7.6 7.4 6.6 37 45 41 35 29 22 18 7.4 7.2 7.4 6.6 31 43 41 35 29 21 18 7.6 7.2 7.4 6.6 27 45 41 35 29 21 18 7.6 7,6 7.4 6.6 25 49 41 34 29 21 18 7.6 7.6 7.4 14 25 321 41 34 29 21 17 7.8 7.8 7.0 10 25 a261 41 34 29 21 17 7.8 7.6 7.0 8.8 25 201 41 34 27 21 17 7.8 7.4 7.0 8.5 25 181 41 33 27 21 17 7.4 7.8 7.0 8.5 27 161 41 33 26 21 17 7.6 7.9 7.0 9.9 25 141 41 33 26 21 17 7.6 7.8 7.2 12 25 121 41 33 26 21 17 7.6 7.8 7.2 12 25 101 39 33 26 21 16 7.6 7.8 7.2 11 25 101 39 32 26 21 a 16 7.6 7.8 7.2 11 25 81 39 32 25 21 16 7.6 7.8 7.2 11 25 71 39 32 25 21 16 7.6 7.8 7.4 11 25 61 39 31 25 21 16 7.6 7.6 7.4 11 25 61 37 31 2.5 21 15 7.6 7.6 7.4 11 25 51 37 30 25 21 15 7.0 7.6 7.4 11 25 51 36 30 25 21 15 7.6 7.6 7.4 13 25 51 36 30 25 21 15 7.6 7.6 7.4 15 25 51 36 30 25 21 15 7.6 7.6 7.4 15 25 47 36 30 24 21 15 7.6 7.4 7.0 15 33 45 36 30 24 20 15 7.6 7.4 7.4 61 41 36 30 24 20 15 7.6 7.4 7.4 61 41 36 29 23 20 15 7.2 7.4 41 41 29 20 14 13 11 9.5 8.8 7.8 7.4 16 27 31 25 16 13 11 9.5 8.8 7.8 7.6 16 28 31 25 16 13 11 9.5 8.8 7.8 7.3 16 34 31 25 15 12 10 9.2 8.8 7.8 7.8 16 34 30 25 15 12 10 9.2 8.8 7.8 9.7 16 33 30 23 15 12 10 9.2 8.8 7.8 17 16 33 30 21 14 12 10 9.2 8.8 7.8 12 16 33 29 21 14 12 10 9.2 8.8 7.8 11 16 33 29 21 14 12 10 9.2 8.6 7.7 11 17 33 29 20 14 12 10 9.2 8.2 6.9 20 17 33 29 18 13 12 10 9.2 8.2 7.8 18 20 35 28 18 13 12 10 9.2 8.2 7.8 a 16 20 35 28 18 13 12 10 9.2 8.2 7.8 15 20 35 28 18 12 12 . 10 9.2 8.2 7.8 17 20 35 28 18 12 12 10 9.2 8.2 7.8 17 21 34 28 18 12 12 10 9.2 8.2 7.8 18 21 34 28 18 12 12 10 9.2 8.2 7.7 18 22 34 28 18 12 12 10 9.2 8.2 7.6 18 22 34 28 18 12 12 10 9.2 8.2 7.6 18 23 34 27 17 12 12 10 • 8.8 8.2 7.6 17 24 34 26 17 12 12 10 8.8 7.9 7.6 17 24 34 25 17 12 12 10 8.8 7.8 7.6 17 25 34 25 17 12 12 10 8.8 7.8 7.6 17 24 34 25 17 12 12 10 8.8 7.8 7.6 17 26 34 25 16 12 11 10 8.8 7.8 7.6 17 27 34 25 16 12 11 10 8.8 7.8 7.6 17 27 34 25 16 12 11 10 8.8 7.8 7.4 17 28 33 25 16 12 11 10 8.8 7.8 7.4 17 27 32 25 16 12 11 9.5 8.8 7.8 7.3 16 27 31 25 16 12 9.5 8.8 7.8 16 27 31 25 16 12 11 8.8 7.8 17 31 16 12 a Interpolated by United States Geological Survey. • Note.— The following notes accompanied the records as furnished to the Survey: Apr. 3 and 4, 1903, plantshut down; Apr. 20-24, 1903, changing transformers; Nov. 26, 1904, to Feb. 26, 1905, no record, addition being made to power house; beginning Aug. 25, 1907, measurements were made below intake instead of above as heretofore. 142131°— 21— M^SP 447- -22 338 SURFACE WATER OF PACIFIC SLOPE, SOUTHEPv:>sr CALIFORNIA. Baihf discharge, in second-feet, of San Antonio Creek near Upland, Calf,, for 1901-1917 — Continued. Jiiiy. Aug. Sept. 1912-13, 1 s'.'.'.'.'.'.'i'.l. 6 S.]...."l 9 10 11 12 , 13 14 15 16.......... 17 18.......... 19 20 21 22 23 24... 25. 2G 27 28.. 29 30 31 9.6 9.6 9.0 11.0 11.0 11.0 10.0 9.5 9.5 9.5 9.5 9.0 9.0 9.0 9.0 9.0 9.0 9.0 9.0 9.0 9.0 8.6 8.6 8.6 8.6 8.6 8.6 8.0 8.6 8.0 8.6 8.6 8.6 8.7 6.5 6.5 0.5 6.5 6.5 6.8 6.8 6.8 6.8 6.8 6.8 y.u 9.0 8. Y 8.7 9.0 8.7 9.0 8.7 9.0 8.7 «.o 8.7 9.0 8.7 9.0 8.7 8.7 8.7 8.7 7.6 7.6 7.6 11.0 8.7 8.2 7.8 7.8 7.8 7.8 7.8 7.6 7.« 11.0 12.5 12.3 10.9 10.9 10.0 9.5 9.5 9.0 9.0 9.5 9.5 9.5 9.5 9.5 9.5 9.5 9.5 9.5 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.8 10.8 10.8 11.0 11.9 12.5 12.7 12.7 13.6 15.0 15.0 15.0 16.2 16.9 16.9 16.9 17.4 17.4 16.9 16.9 16.9 16.9 16.5 16.5 16.5 16.0 16.0 16.0 16.0 16.0 16.0 16.4 16.4 16.4 16.4 16.4 16.0 16.0 15.4 15.4 15.2 15.0 14.5 14.5 14.0 14.0 13.5 13.5 13.0 13.0 13.0 14.3 15.1 15. G 15.6 16.0 15.6 15.6 15.6 15.1 15.1 15.0 14.5 14.5 14.3 14.3 14.3 13. 7 13.4 ; 13.4 13.2 13.2 12.9 12.9 12.4 12.4 12.4 12.0 12.0 11.7 11.7 11.7 11.4 11.4 11.4 11.4 11.4 11.1 11.1 10.6 10.4 10.4 10.2 10.2 10.2 9.0 10.2 9.9 9.9 9.4 9.4 8.1 8.1 8.8 8.9 8.7 8.7 9.2 9.2 9.0 8.7 8.7 8.7 8.7 8.4 8.4 8.3 8.3 8.3 8.0 8.2 8.0 7.0 7.6 7.6 7.5 7.5 7.4 7.5 7.4 7.4 7.1 7.2 7.1 7.1 7.1 7.2 7.1 7.0 7.0 7.0 7.0 6.9 7.0 7.0 7.0 7.0 6.8 0.5 6.7 6.7 6.7 6.7 6.7 Note.— No record Nov. Survey. 20, 21, 28, 29, Dae. 1. and May 13; discharge interpolated by U. S. Geol. 1913-14, 1 4... 5 6. S.......V. lO'.'.'.'.'.'.'.'.'. 11 12 13 14 15.. 18 17 18 19 20 21 22 23 24 25..... 26 ., 27 , 28 29 30 31.... 6.7 6.2 6.6 6.6 39 199 36 35 32 27 23 6.7 6.0 6.6 6.5 37 179 36 35 32 26 23 6.7 6.6 6.6 6.5 35 159 36 35 32 28 22 6.7 6.2 6.6 6.5 35 139 36 35 32 26 22 6.7 6.6 6.6 6.5 34 119 36 35 32 26 22 6.7 6.6 6.5 6.5 33 109 35 35 32 26 21 6.7 6.2 6.5 6.5 32 99 35 35 32 26 21 6.7 6.0 6.5 6.5 31 89 35 35 32 26 20 6.7 6.2 6.5 6.5 30 79 34 34 32 26 20 6.7 6.2 6.5 6.5 30 69 34 34 32 . 26 20 6.6 6.2 6.5 6.6 30 59 34 34 31 26 20 6.6 6.8 6.5 6.5 30 55 33 34 31 26 20 6.7 6.6 6.5 6.5 30 49 39 34 31 26 19.1 6.7 6.6 6.5 6.6 29 43 33 34 31 26 19.1 6.6 6.5 6.5 9.4 27 43 33 34, 31 26 18.6 6.6 6.3 6.5 9.4 27 43 33 34 31 26 18.6 6.6 6.3 6.5 8.8 27 43 33 33 30 26 18.6 G.2 6.3 6.5 21 27 43 33 33 30 26 18.6 6.6 7.7 6.5 14 47 43 33 33 29 26 18.6 6.6 7.0 6.5 9.9 507 41 33 33 29 25 18.6 6.0 6.6 6.5 11.6 607 41 33 33 29 25 18.3 6.6 6.6 6.5 13.2 567 41 33 33 28 25 18.3 6.6 6.6 6.5 13.8 527 41 33 33 28 25 18.3 6.6 6.6 6.5 21 487 41 33 33 28 25 18.3 6.0 6.5 6.5 25 427 39 33 33 28 25 18.3 6.0 6.6 6.5 108 387 39 33 33 28 25 18.3 G.6 6.6 6.5 58 339 36 33 33 27 24 18.3 7.0 6.6 6.5 61 258 37 33 33 27 24 18.0 6.6 6.6 6.5 51 37 33 33 27 24 18.0 6.0 6.6 6.5 51 37 35 33 27 24 17.7 6.0 6.5 43 m S3 23 17.7 17.5 17.0 16.5 16.5 15.6 15.6 15.6 15.6 15.6 15.5 15.5 15.5 15.1 15.3 15.5 15.3 15.1 15.1 15.1 15.1 14.7 14.7 14.7 14.7 14.5 14.5 14.5 13.9 SANTA A>TA RIVER BASIIT. 339 Daily discharge, in second-feet, of San Antonio Creeh near Upland, Calif ., for 1901-1917 Continued . Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1914-15. 1 14.5 14.3 15.3 13.9 13.1 14.3 13.9 13.9 13.9 13.9 13.9 13.2 13.2 13.2 13.2 12.9 12.9 12.9 12.6 12.6 12.6 12.1 12.6 12.6 12.6 12.4 12.4 12.6 12.4 12.6 12.6 13.8 13.8 13.5 13-2 13.5 13.8 13.8 13.5 13.5 13.5 13.5 13.2 13.2 13.2 13.2 12.9 12.9 12.7 12.7 12.7 12.4 11.9 11.5 11.5 11.5 11.5 11.5 11.5 11.7 11.5 11.3 12.4 12.4 12.4 12.1 12.1 12.1 12.1 11.8 11.8 11.8 12.1 12.1 11.8 11.8 11.8 11.4 11.4 11.0 11.0 11.0 11.0 11.0 10.8 10.8 10.8 10.8 10.5 10.8 10.8 10.8 10.7 1L5 il.7 iLS 11.5 11.9 11.7 11.5 11.9 11.9 11.8 11,7 11.2 11.5 11.5 11.5 11.5 11.5 11.5 11.2 11.2 11.2 11.0: 11.0 11.0 11.0 11.0 11.0 10.7 10.7 10.8 10.8 10.8 10.8 10.8 10.8 10.8 10.8 10.5 10.5 10.5 10.8 10.8 10.5 10.5 10.3 13.6 12.3 10.9 10.5 10.9 10.9 10.5 m.5 10.5 10.5 10.9 10.9 10.9 10.9 10.9 10.7 10.7 10.7 11.9 10.7 11.0 10.7 10.7 10.7 10.7 10.7 10.7 10.7 11.9 11.4 10.7 m.7 10.3 10.3 10.3 10.2, ]0.2 10,2 9,9 10.2 10.2 10.2 9.9 9.9 9.9 9.9 10.9 10.9 10,9 10. 9 10.9 10.9 10.9 10.9 10.9 10.9 10.9 10.9 10.3 10.3 9.8 10.3 9.8 9.6 9.8 9.8 9.6 10.3 9.8 9.6 9.8 9.8 9.8 9.8 42 39 16 9.9 12.9 11.9 m.3 11.0 11.0 10.7 10.3 11.5 11.5 11.9 11.2 11.2 11.2 11.7 1L5 18.6 '306"' 200 150 150 150 150 200 150 150 120 . 18.0 23 29 25 23 23 21 21 22 118 108 108 108 99 79 79 79 69 69 69 65 65 65 65 65 65 59 59 100 100 100 100 80 80 70 60 60 51 40 30 20 30 30 25 25 22 41 41 39 , 39 : 39 37 ^ 37 41 \ 49 41 : 41 \ 59 59 59 59 59 59 54 53 53 49 49 49 47 47 45 45 43 39 39 39 39 35 35 3S 35 35 35 35 36 36 35 41 41 41 39 39 39 39 38 40 40 41 41 41 42 42 41 42 42 42 43 49 49 49 49 49 49 47 47 47 47 45 31 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 43 45 45 45 41 41 39 39 37 37 37 37 37 37! 35 35 31 31 31 29; 29 29 29 29 29: 27 ' 27 27 i 27 25 25; 43 46 46 46 46 46 46 46 43 43 43 43 43 43 43 43 43 43 47 47 47 45 45 45 45 45 45 45 45 45 43 25 25 25 25 25 25 25 25 25 25: 23 23 23 23 23 23 23 22 22 23 23 23 23 22 22 i 22 : 22! 22 22 22 22 43 45 43 43 43 43 43 43 43 43 41 41 41 39 39 39 39 37 37 37 37 37 37 37 37 37 35 35 33 33 22 22 22 22 . 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 19.6 19.6 19.6 18.6 18.6 18.6 : 18.6 18.6 18.6 18.6 33 33 33 33 33 31 31 31 31 29 29 27 27 27 27 27 27 26 26 26 26 25 25 25 24 24 24 23 23 23 23 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.6 18.0 18.0 18.0 17.7 17.7 17.7 17.7 17.4 17.4 17.4 17.4 17.4 17.4 23 22 22 22 22 22 22 21 21 21 21 21 19.6 19.6 19.6 19.6 19.6 19.6 19.6 19.1 19.1 19.1 18.9 19.1 18.6 18.0 21 19.6 19.1 19.1 19.1 17.4 17.4 17.4 17.4 17.4 15.1 17.4 15.2 14.3 15.0 16.0 15.2 15.2 15.0 15.0 14.7 14.6 14.7 14.7 14.7 14.5 14.1 14.1 13.8 13,8 13.8 13,6 13.5 13,2 13,5 13.5 19.1 2 19.1 3 19.1 4 18.6 18.6 r, 18.6 7 18.3 8 18.0 9 17.7 10 17.7 11 17.4 12 17.1 13 17,1 1-1 17.1 15 17.1 16 16.7 17 - . 16.0 IS 16.0 19 14.7 20 14.3 21 15.2 22 15.2 23 15.0 24 15.3 25 16.0 26 15.2 27 14.7 28 14.1 29 14.3 30 14.1 31 1915-lG. 1 13.5 2 13.2 12 9 4 12.9 5 12.7 c> 12.9 7 12.9 s 12.9 9 12.4 liO 12.9 11 12.4 12 12,4 13 12.2 14 11.4 15 IG 11.1 12.2 17 12.1 18 19 12.2 11.9 20 11,9 21 11.9 22 23 11.9 11.9 24 11.9 o^ il 5 25 27 28 11.5 11.2 11.2 29 11 2 3o:::::. :::::::: 11.7 31 340 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in sccond-fcet, of San Antonio Creek near Upland, Calif., for 1901^19 17- Contimied. Da3^ Oct. Nov. Pec. Jan. Day. Oct. Nov. Dec. Jan. 1916-17. 1 11 14 14 14 14 15 15 15 15 15 15 \l It 13 13 13 12 14 14 13 13 13 13 13 13 12 12 12 11 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 1916-17. 16 14 14 14 14 14 14 14 14 14 12 12 12 12 13 13 14 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 11 17 17 14 12 12 12 12 12 12 2 17 12 3 18 12 4 19 . 14 5 20 13 6 21 13 7 22 14 8 23 14 9 24 14 10 25 13 11.. 26 13 12 27 13 13.. ............ 28 13 14 29 13 15 30 13 31 . 13 Monthly discharge of San Antonio Creeh near Upland, Calif., for 1901-1917. Discharge in second- feet. Maxi- Mini- mum, mum. Run-off (total in acre- feet). Discharge in second- feet. Maxi- Mini- mum, mum. Run-off (total ina;cre- feet). 1901. March 11-31. April May June July August September. . The period . 1901-2. October November December January February March April May June July August September The year. . . 1902-3. October November December January February March 1-28 April (23 days). May June July August September 1903-4. October November December January February 8.7 7.7 6.3 6.3 6.8 8.3 9.3 11 9.7 6.8 6.1 5.3 4.6 4.9 4.6 6.3 6.3 9.0 200 16 20 18 12 9.9 8.7 7.4 7.1 6.6 8.4 5.4 5.0 6.3 6.0 6.0 5.7 6.3 8.3 9.3 6.5 6.0 6.2 4.6 4.2 4.4 4.4 6.0 6.0 14 16 16 13 6.0 3.4 5.53 8.19 16.7 15.7 12.4 9.42 8.11 7.22 6.91 6.23 6.04 5.90 7.43 8.60 10.6 8.07 6.29 5.45 4.90 4.50 4.37 4.46 4.67 6.02 7.30 30.2 16.0 18.6 15.6 11.1 9.25 7.94 7. 27 6.90 6.56 6.31 230 487 1,030 934 762 579 483 4,500 444 411 383 371 328 457 512 652 480 387 335 292 5,050 277 260 274 287 330 404 1,385 984 1,110 959 682 550 433 424 403 363 1903-4— Contd. March April May June July August September. . . . The year 1904-5. October. .. — November 1-25 March April May 1 June July August September 1905-6. October November December January February. . March April : . . . May June July August September The year. . 1906-7. October November December January February March .:.. April , May 17.0 15.0 17 14 9.3 8.3 6.3 5.4 400 70 36 34 32 20 14 12 13 12 15 22 300 240 110 100 80 30 22 15 13 18 32 60 160 11.0 15.0 10 7:5 6.8 6.0 8.11 12.5 15.5 11.5 8.32 7.41 6.39 5.4 5.4 18 30 30 30 20 14 12 10 10 11 9. J 13 16 90 80 80 30 22 16 32 60 100 5.63 5.40 106 ?9.8 33.9 32.4 24.0 16.6 12.8 11.2 11.3 11.0 11.1 13.8 146 122 84.5 88.3 47.4 28.2 17.3 13.5 12.0 13.4 25 4 47.0 121 113 499 744 953 684 512 456 380 6,340 6,520 2,370 2,080 1, 930 1,480 1,020 , 762 672 676 682 766 8,980 7,260 5,200 5,250 2,910 1,730 1,030 35, 800 714 824 1,560 2,610 7,440 6,720 5,520 SANTA ANA EIVER BASIN, 841 Monthly discharge of San Ardonio CraJc near Upland^ CGlif..j'(i 1901 -19 j7 — ('ontmr.ed. Discharge in sceond- fect. raum. mum. 19O0>-7— Contd, JxHie... July August September The year . 1907-8. October November... December... January February — March April May June July Augast September... The year. 1908-9. October November... December... January February March April May June July Augast September... The year. .. 1909-iO. October November — December January 7-31.. February March April May June July August September — 1910-11. October November — December January February March April May June July..... August September.... The year.. 1911-12. October November December January February March AprO 15 14 1-2 17 16 31 35 36 22 16 14 10 9.0 8.5 -8.5 130 101 101 101 81 71 27 19 15 27 211 51 33 27 22 16 14 11 9.0 7.9 7.4 61 41 S21 43 36 29 23 19 15 13 11 9.5 20 28 21 15 12 11 9.7 14 15 27 22 16 12 10 9.0 57.7 28.7 21.7 17.3 16.7 14.8 13.1 11.2 11.2 15.5 18.5 29.7 26.6 19.4 13.7 11.7 9.22 9. j 16. 2 31 80 81 81 29 18 8.64 7.98 8.25 24.4 72.7 87.4 83.0 81.0 46.9 23.6 16.4 13.0 39.2 14 11 7.0 7.2 7.0 6.6 25 35 36 29 23 20 14 12 9.5 8.8 7.8 6.9 7.3 16 11.5 10.9 16.8 139 45.1 25.6 24.6 19.7 15.3 12.4 10.0 8.29 7.60 7.59 7.29 14.3 27.7 85.9 39.3 32.6 26.6 21.2 16.6 13.2 Run-off (total in acre- feet). 3,430 1,760 1,330 1,030 33, 800 1911-li-Contd. May June July August September 689 689 892 1,140 1,770 1,640 1,150 842 719 549 11,800 531 475 507 1,500 4,040 5,370 4,940 4,980 2, 790 1,450 1,010 774 28,400 707 649 1,030 6,890 2,500 1,570 1,460 1,210 , 910 762 615 493 25.0 11.9 10.1 9.07 8.23 7.66 15.1 21.2 467 452 448 879 1,540 5,280 2,340 2,000 1,580 1,300 1,020 786 18, 100 732 601 558 506 441 928 1,260 The year. . 1912-13. October November... December . . . January February March April May June July August September... The year... 1913-14. October November... December . . . January February — March April May June July Augu.st September... The year . 1914-15. October November... December . . . January February March April May June July August . . September... The year.. 1915-16. October November — December. . . . January February March April May June July August September The year. . 1916-17. October November December January Discharge in second- feet. Maxi- mum. 35 31 25 16 12 12.5 10.0 17.4 16.4 15.1 10.6 8.7 7.2 17.4 15.3 12.4 13.6 42 118 59 43 47 45 33 23 19.1 13.8 11.9 11.9 100 49 45 25 22 18.6 17.4 13.5 Mini- ' mum, I 16 12 9.0 8.6 8.7 6.5 7.1 9.0 10.0 13,0 11.1 33.1 27.5 18.7 12.9 10.3 15.5 9.36 8.65 8.70 7.24 8.45 9.56 14.7 15.1 12.8 9.33 7.76 6.87 6.0 . 6.0 6.5 6.5 27 36 33 33 27 23 17.7 13.9 12.1 10.5 10.3 9.6 18.0 35 31 43 33 23 18.0 14.1 9,6 11.3 10.7 22 38 25 22 18.6 17.4 13.2 11.1 6.54 6.50 6.52 19.7 168 68. 34.1 33.8 30.0 25.5 19.5 15.4 35.3 13.2 11.5 10.9 12.5 60.6 45.0 35.1 44.6 39.3 27.5 20.2 16.6 27.8 12.7 11.4 10.5 51.0 43.3 33.7 23.3 21.0 18.2 15.0 12.2 13.5 12.4 12.3 12.5 Note.— Tables of monthly discharge computed by U. S. Geological Survey. 342 SUEFAGE WATEE OF PACIFIC SLOPE, SOUTHEEIST CALIFORNIA. MISCELLANEOUS MEASUREMENTS OF SAN ANTONIO CREEK. DiscJiarge rneasuremenU of San Antonio Creeh at dircrdon dam near Claremont^ Calif., for 1888-19 IG. {Made by F. E, Trask] Dis- charge. Dis- charge. July IG July 15.. Aug. 1.. 15.. Sept. 2.. 16.. Oct. 1.. 17.. Nov. 2.. Dec. 2.. July 15.. Aug. 1.. 15.. Sept. 6.. 15.. Jaiy 15.. Aug. 1.. Sept. 1.. Sept. 15. . July 15.. Sept. 15.. Not. 19.. June 20.. July 15.. Aug. 15.. Sept. 15.. Oct. 15.. Nov. 12.. Dec. 16.. Mar. 24.. May 11.. July 16.. July 15.. Aug. 22.. Sept. 7.. June 25., July 15.. Sept. 15. . Nov. 2.. Dec 26.. Jan. 25.. Feb. 8.. 22.. July 6.. 19.. Aug. 2.. 16.. Oct. 4 Mar. 16.. AIM". 4., my 4.. 24 33 38 32 27 22 19 20 15 13 11 11 11 6.0 5.8 5.4 6.4 6.0 10 9.2 : 13SS, June 6 Jaly 5 Aug. 15 Sept. 5 Oct. 2 No\'. 6 Dec. 5 1899. Jan. 3 Feb. 6 Mar. 6 Apr. 5 Mav 1 July 3 Aug. 7 Sept. 3 Oct. 2 wm. .Tan. 1 Feb. I Mar. 5 Apr. 1 May 7 June 4 .Tuir 1 Aug. 6 Sept. 1 Oct. 8 1902. June 2S Julv 5 Aue;. 2...... Sept. 6 Oct. 4 1903. Jan. 19 Mar. 16 Apr. 24 June 25 July 29 Aug. 24...... Oct. 6 Dec. 1...... 1904. Jan. 22 Feb. 8 Mar. 5 Apr. June 4 July 8 Aug. 11...... Sep't. 7 Oct. 7 Nov. 5 Dec. 9 1905 Jan. 19 Mar. 6 Apr. 4 May 8 June 10 July 15 Aug. 8 Sept. 11 Oct. 11...... Nov. 9 .. Dec. 9 Scc.^t. 6.1 4.6 5.1 5.4 4.9 5.7 5.1 3.3 4.3 4.5 3.7 5,3 6.1 6.4 5.1 6.1 5.5 4.8 3.9 3.6 3.1 6.8 7.3 5.2 4.3 4.4 9.2 72 26 14 11 9.7 7.9 7.8 7.7 7.9 15 14 10 7.6 6.7 6.3 5,8 5,8 7,; 18 80 58 42 24 19 14 12 15 13 1906. .Tan. 17 Feb. 9 Mar. 5 Apr. 9 May 3 June 2 July 10 Aug. 9 Sept. 8 Oct. 5 Nov.2 Dec. 14 1907. Jan. 14 Feb. 11 Apr, 13 May 11 June 6 July 10 Alls. 7 Sept. 6 Oct. 5 Nov.8 Dec.7 1908. Jan. 11 Feb. 22 Mar. 16 Apr. 6 Mays June 6 Ju]y6 , Aug. 6 Sept.4 Oct.9 Nov.8 Dec.3 , 1909. Jan. 10 Feb. 13 Mar. 14 Apr. 11 May 10 June 5 July 12 Aug.3- Sept. 13 , Oct. 12 Nov. 5 Dec. 13 1910. Jan. 19 Feb. 14 Mar. 9 Apr. 10 May 7 June 10 July 10 Aug. 9 Sept.4 Oct. 8 Nov. 5 Dec. 10 1911. Jan. 14 , Feb. 6 , Mar. 16 , Mav 2 , SAKTA AISTA EIVER BASI]!T, 843 Discharge raeasuremients of San Antonio Creel- at diversion, dam upar Claremont Calif., for 1888-1916— Continued. 1911. June 5 Jiily 10 Aug. 8 Sept. 11 Oct. 12 Nor. 3 Dec. 10 1912. Jan. 7 Feb. 10 Mar. 17 Apr. C) May 4 Junes July 6 Aug. 3 Sept. 3 Oct. 20 Nov. 16 Dec.8 Dis- charge. Sec. -ft. 6G 24 16 13 13 13 13 10 19 22 16 Dis- charge. 1913, Jan. 19 Feb. 5 Mar, 2 Apr. 10 May 6 June 9 July 13 Aug. 1 Sept. 8 Oct. 3 Nov. 10 Dec.3 1914, Jan. 13 Feb. Mar. 4 Apr. 11 June 4 July 11 Aug. 11 Sept. 12 Scc.-ft. 11 10 14 18 19 IG 7.4- 7.2 8.6 72 133 51 29 1914. Oct. 10 Nov, 14 Dec. .5 1915, Jan. II.. Feb. 8 Mar. 8 Apr. 10 May 10 June 8 10 A.ug. 12 Sept. 4 Oct.G Nov. 8 Dec. 7 1916, Jan. 8 Feb. 7 Mar. 8 Apr. 7 Dis- charge. Scc.-ff. 15 14 13 96 112 Note. — Measurements made by F. E. Trask furnished in miner's inches: coaverted by U. S. Geological Survey engineers, assuming on basis that 50 miner's inches equal 1 second-foot. Discharge measurements of San Antonio Creel', San Bernardino County, Calif., for 1896-1903. Date. Made by- Locality. Dis- charge. July 23, 1896 Sec-feet. 7.9 'Do do l.SS July 2 1898 F. H. Olmsted do Mouth of canvon G.59 Do 3.36 Aug 26, 1898 do 6.18 \ug 25 1899 S. G. Bennett Mouth of canvon 4.48 Julv 11,1900 do do . 4.07 Sept 25,1900 AV. W. Cockins,jr S. G. Bennett do 3.72 Oct 7 1900. do... do 5.99 Apr. 3,1902 11.4 Apr. 1,1903 W. B.Clapp.. Mouth of caifvon 854 Do Clapp and Clausen "w.B.Clapp.! do 57 Do Mav 25,1903 Mouth of canvon 34 *Do do ...do Julv 3,1903 19.5 Sept. 13 1903 .do -do .. .■ 11 Sept. 23,1904 do do 6.4 1902. June 28 J. B. Lippincott do 7. 69 July 12,11.40 a.m.... 12,1.13 p.m Aug. 2,11.15 a.m -do . ... G.88 do do do .do .... 6.58 6,15 9,lla.m 9, 1.12 p.m 29,11.45 a.m ... ...do do. . G. 15 .do do 5.99 do .do 5.61 Sept. 29, 12.30 p.m Oct. 18,12.30 p.m... do . .do do do 4.88 4.74 .....do Jvme 28 6.56 28 .do Gird v.ater .42 do 6.98 Julv 12,10.58a. m... 5.76 12 .do Gird vf ater .35 -do.. 6.11 12,2.40 p. m. .. 5.20 12 do .35 5.55 S44 SURFACE WATEE OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Discharge jncasurcments of San Antonio Creek, San Bcnia>-dino Countif, Calif., for 1896- jS>0^— Continued. r>ate. Made by— Locality. Dis- charge. 1902. A-Qf. 2, 10.30 a. m 2 J. B. Lippincott . .do Sec-feet. 4.83 .36 ll 1 i ^ilU 1 1 1 1 1 '1 1 < < < 1 < < SANTA ANA EIVER BASIN. 359- ^ i 'i ^ g 1^ ^ 3 8 2.68 7.90 1.45 1.20 d 3.13 ?15. 49 3.91 3. SI § 8 o c3 ^ S 3 1 ^ 8 ^ 8 5' Si So" 3I £11 res < 1 lo ,0 g S * P.O TSt^* P* P-5 360 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Discharge measurements of Bedlunds or Bolen tunnel for 189&-J905. Date. Made by- Dis- charge. Date. Made by — Dis- charge. 1896. Nov. 21 J. B. Lippjncott . ... Sec-feet. 1.00 1.24 1.24 .67 1.03 1.10 .88 .84 .85 1901. July 6 Dec. 5 1902. July 10 1903. Aug. 31 1904. May 28 June 29 Sept. 21 1905. Sept. 22 S- G. Bennett Sec-feet. 1.40 J. B. Lippincott do .90 1898. June 12 S. G. Bpnnott- Sept. 8 1899. June 15 do .90 S. G. Bennett.. W. B. Clapp-- 1.8 July 15 Aug. 24 do..... W. B. Clapp.. .do ... S. G. Bennett 1. 69 1900. do 1.55 Apr. 14 do 1.04 July 13 Oct. 2 do W. W. Cockins, jr 1.10 WATER ABSORBED IN SAND AND GRAVEL. Dimng the winter of 1902-3 the precipitation in southern Cali- fornia was greater than at any time during the preceding 10 years. This condition led to heavy irrigation during the spring of 1903, many irrigators taking advantage of it to thoroughly saturate the soil at a time when water was plenty and cheap, thereby saving much expense and contention, which always accompanies a later irrigation when water is scarce and expensive and. the demand is greater than the supply. Immediately after the rain of April 16, 1903, a series of meas- urements were made by W. B. Clapp under the direction of the United States Geological Survey to determine the quantity of water being absorbed in the sand and gravel washes of the larger tributary streams of the three principal river basins of southern California — - Santa Ana, San Gabriel, and Los Angeles rivers. Measurements were taken at the mouths of the canyons where the streams leave the mountains, at all canal diversions, and at such intervals along the streams as time and the available force detailed for this work would allow, the location of the point where the stream entirely disappeared or left the valley being noted. These measurements show the quan- tity of water taken up in the sand and gravel wash of this stream on the days given, and the following tables give this quantity in second- feet and acre-feet for a period of 24 hours: SANTA ANA KIVER BASIN; 361 Water discharged froon tributary streams and sinking in the Santa Ana River, hasin above Colton, Calif. Second -feet. Acre-feet. stream. Diver- sion. Waste. Total. Diver- sion. Waste. Total. APR. 24, 1903. 16 5 116 34 23 22 10 8.6 56 132 39 23 22 10 8.6 63 32 10 230 67 46 44 20 17 111 262 Mill Creek 77 Plunge Creek 46 City Creek 44 East Twill Creek 20 West Twin Creek 17 Lytle Creek 7 125 28 270 298 56 535 591 MAY 16, 1903. 47 49 6 7 2 2 15 48 19 3 4 3 2 14 95 ♦38 9 11 5 4 29 93 97 12 14 4 4 30 95 38 6 8 6 4 28 188 Mill Creek 136 Plunge Creek 18 City Creek ... 22 East Twin Creek 10 West Twin Creek 8 Lytle Creek . ... 68 128 93 221 254 185 439 RETURN WATERS IN SAN BERNARDINO COUNTY. Natural Jiow, in second-feet, of return water compared with developed ivater in San Bernardino Valley above Colton, Calif , for 1898-1907 . [By K. Sanborn, engineer Riverside Water Co.] Date. location. De- veloped. Natural. Total. Sept. 4, 1903 Bambill pumping plant 0.80 .85 .77 1.10 .80 1.30 1.50 1.70 1.30 80 May 12,1904 Aug. 15,1904 June 9, 1905 do 85 . . . . do. .77 ..do 1 10 Sept. 27,1905 June 23,1906 do... 80 .... do 1 30 Aug. 27,1906 . ..do do .. do.-.. . 1.50 June 25,1907 1.70 Sept. 18,1907 1 30 June —,1898 Beam ditch 0.67 .65 .72 .52 .40 .68 .50 .33 .22 .08 .02 .00 .00 .00 .00 .00 .00 .00 .67 Sept.— ,1898 Mar. —,1899 .... do .. . .65 do-.- 72 June —,1899 do .52 Aug. —,1899 Mjir. —,1900 .... do 40 do. . . . 68 June —,1900 do ' M Sept.— ,1900 Oct. 13,1902 .... do . 33 do.... •22 Ausr. 17,1903 ...do: ... .€8 June 4, 1904 .. do . .. 02 Aug. 20,1904. ...do .00 June 10,1905 do .bo Sept. 2,1905 do 00 June 18,1906 do .00 Aug. 23,1906 .... do - 00 June 21,1907 do.... 00 Sept. 28, 1907 June —,1898 do .00 Bloomington pumping plant 5.20 5. 49 .00 5.93 3.05 3.80 3.68 3.28 2.28 8.82- .00 5.61 5.26 Sept. -, 1898 Mar. —,1899 do. ... . 5 49 do ,00 June —,1899 do.... 5.93 Aug. -,1899 Mar. —,1900 do.... 3 05 do do do 3.80 June —,1900 3.68 Sept. — , 1900 3.28 Oct. 7, 1902 .... do 2.28 Sept. 4,1903 do. 8.82 May 12,1904 .....ao..... .00 Aug. 17,1904 ....do. 6.61 362 SURFACE WATER OE PACIFIC SLOPE, SOUTHERN CALIFORNIA. Natural flow, in second-feet, of return water compared with developed water in San Bernardino Valley above Colton, Calif , for 1898-1907 — Continued. Date. Location. De- veloped. Natural. Total. June 16 lonr. 6.62 7.20 10.50 6.70 5.60 6.50 .11 .61 1.20 2.13 1.63 1.02 2.55 2.60 1.67 1.70 2.20 2.50 2.60 2.60 1.20 2.70 1.94 6.62 Sept. 27 June 20 1905 1906 1906 1907 1907 1903 1898 1898 1899 1899 1899 1900 1900 1900 1902 1903 1904 1904 1905 1905 1906 1906 1907 1907 1904 1905 1905 1906 1906 1907 1907 1906 1907 1907 1904 1904 1905 1905 1906 1906 1905 1905 1906 1906 1907 1907 ,1898 1898 1899 1899 1899 1900 1900 1900 1902 1903 1904 1904 1905 1905 1906 1906 1907 1907 1898 1898 1899 1899 1899 1900 1900 1900 1902 1905 190G 1906 1907 1907 1903 do . . -. . . 7 20 do ^. .... do *. 10.50 Sept. 20 June 21 6.70 do do 5.50 Sept. 26 Sept. 9 June — 6.50 .11 Camr» Carlton ditch 61 Sept. — Mar. — do 1.20 do--.- 2.13 JXXXXQ — do 1 63 Mar. — ...do 1.02 . do..-- . - 2.55 June — do. 2 60 Sept. — Oct. 7 ...do 1.67 . do---- 1.70 Aug. 22 do 2.20 do 2.50 Aug. 19 May 31 Aug. 14 June 20 do.--- 2.60 do 2 60 .. do 1.20 do.--- 2.70 Sept. 7 June 20 do 1.94 . .. do 4.40 4.40 Sept. 25 Aug. 12 do.... 3.10 .72 .72 .60 .40 .70 .00 .00 1.50 4.00 2.00 .82 1.02 3.10 .72 June 10 .do - - .72 Aug 14 do. .60 Juno 19 .... do .40 Aug. 24 June 22 do-.-- .70 do .00 Sept. 20 Sept. 20 June 25 do .00 1,50 do 4.00 Sept. 26 May 31 Aug. 17 do 2.00 City of Pan Bernardino- . . . 1.87 1.79 2.04 1.90 1.90 2.00 2.69 do City of San Bernardino, Lytle Creek 2.81 2.04 Sept. 27 June 20 do .-- - 1.90 do 1.90 Sept. 20 Jtme 10 do 2.00 City of San Bernardino, Sixth Street pumping plant do. 1.99 4.80 2.00 4.80 4.00 2.30 6.82 7.40 3.20 5.49 3.89 4.94 1.99 Sept. 27 Jvine 29 4.80 do 2.00 Oct. 23 do-... 4.80 June 20 do 4.00 Sept. 28 do 2.30 6.82 Sept. — Mar. - do- 7.40 do 3.20 do.--- 5.49 Mar. — do 3.89 do . do..-- - - 4.94 June — 3.21 3 54 3.21 Sept. — Oct. 7 do.. 3.54 do 3.53 3.17 3.00 2.06 3.81 2.70 2.40 3.50 4.50 4.50 1.97 1.61 1.69 1.30 1.30 1.09 1.54 1.53 1.08 1.20 .70 1.60 1.20 .00 2.70 3.53 Sept. 4 May 12 . .. do..-- . . .. 3.17 do do dO---- 3.00 Aug. 19 2.06 June 9 3.81 Sept. 27 June 19 do.-- 5 2.70 do ..do ... 2.40 Aug. 27 3.50 June 25 City of Colton pumping plant (total) 4.50 Sept. 18 do 4.50 June — City of Colton (water used for irrigating) 1.97 Sept. — Mar. - .do 1.61 do do 1.69 June — 1.30 Mar. — do 1.30 do. 1.69 June — do 1.54 Sept. — Oct. 7 do 1.53 do 1.08 1.20 .70 1.60 1.20 .00 2.70 Sept. 27 June 19 . .. do do . - Aug. 27 June 25 do do Sept. 18 Sept. 7 . do Cooley tract, artesian welL SANTA ANA RIVER BASIN. 363 Natural flow, in ^ecoTid-feet, of return water compared with developed water iyi San Bernardino Valley above CoUo7i, Calif., for 1898-1907 — Continued. Date. Location. De- veloped. Natural. Total. June — , 1R9S Daley ditch 0-63 .67 .71 .51 .51 .72 1.12 .54 .00 .00 .00 .00 .00 .00 .00 .00 .00 0.63 Sept. -- Mar. — 1898^ 1899 1899 1899 1900 1900 1900 1902 1903 1904 1904 1905 1905 1906 1906 1907 1907 1905 1905 1906 1908 1907 1907 1898 1898 1899 1899 1899 1900 1900 1900 1902 1903 1904 1904 1905 1905 1906 1906 1907 1907 1898 1898 1899. 1899 1899 1900 : 1900 1900 1902 1903 1904 1904 1905 1905 1906 1906 1907 1907 1903 1904 1904 1905 1905 1906 1906 1907 1907 1898 1898 1899 1899 1899 1900 ,1900 1900 1902 1903 1904 do .- . .67 do .71 do .51 Aug. - Mar. — ... do .51 do . .72 do - 1.12 Sept- — Oct. 13 ...do .54 do .00 Sept. 9 June 4 do .00 do .00 Aug. 20 June 10 do .00 do - .00 Sept. 4 do .00 June 25 . ...do.... .00 Oct. 24 do .00 June 20 do .00 Sept. 25 do. 0.00 .05 .40 .GO .75 .65 .05 .00 May 30 Excelsior Land & Water Co .65 Sept. 28 do..-. .40 June 27 do .60 Aug. 24 do .75 June 19 do .65 Sept. 18 do Gage canal intake, Santa Ana River do .65 June — Sept. — i.ie Lie .72 .24 .u .395 .29 ;J5 .00 .00 .00 .00 .00 8.30 .00 .00 .40 1.16 1,16 Mar. — do : .72 June — . do .24 Aug. — do -64 Mat. - do -395 June — do .29 Sept. — do .17 Oct. 7 do .00 Aiig. 21 do .00 May 31 do... .00 Aug. 15 ... do .00 May 26 do... .00 Sept. 4 do .00 June 19 .....do .00 Sept. 7 do-..r . .00 June 20 .... do ! .00 Sept. 20 do .40 June — Gage canal, Palm Avenue weir. . 26.26 25.07 26. 68 25.22 23.47 21. 96 22.23 27.85 30.17 30.82 27.80 31.96 28,83 32.70 22.90 38.00 26.26 Sept. — do. - do... .....do... do 25.07 Mar. - 26.68 June — 25.22 Aug. — 23.47 Mar. - do do.. do do do 21.96 June — Sept. — 22.23 27.85 Oct. 11 30.17 Aug. 21 30.82 May 31 do... 27.80 Aug. 19 do :.:.::::::::::::::::::::::;:: do do... do 31.96 May 31 28. S3 Sept. 2 32.70 June 20 8.30 31.20 Sept. 7 do... 38.ffl) June 20 do 50.16 .40 50.10 Sept. 20 do... 33.20 .77 .34 ,34 .54 .00 .30 .35 .70 .00 33.60 Sept. 9 Garner tract, artesian well .77 May 12 Grand Terrace pumping plant do ,34 Aug. 17 .34 May 31 do : do .54 Aug. 14 ,00 June 9 do .30 Sept. 7 do... .35 June 20 do -70 Sept. 20 do .09 June — Haws & Talmadge ditch .84 .00 .28 .00 .00 .00 .00 .09 .00 .00 .09 .84 Sept. — do... .00 Mar. - do ,. .28 June — do.. .00 Aug. — do .00 lul - do... .00 June — do .00 Sept. — do... .00 Sept. 30 do.. .00 Aug. 17 do........ .00 May 13 do.. .09 364 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Natuml flow, in second-feet, of return water compared with developed water in San Bernardino Valley above Colton, Calif., for 1898-1907 — Continued. Date. Location. De- veloped. Natural. Total. Aug. 15,1904 June 2, 1905 Sept. 5,1905 June 14,1906 Aug. 23,1906 June 21,1907 Haws & Talmadge ditch 0.00 .00 .00 .05 .08 .08 0.00 do .00 do 00 do .. 05 do .08 do 00 Sept. 28,1907 Sept. 4, 1903 do 0.00 1.79 1.82 1.54 1.09 1.60. 1.90 1.50 1.50 1.50 .21 .42 .67 .39 .59 .30 .52 .48 .40 .00 .24. .25 .25 .30 .00 .00, .00 .00 .00 .59 .65 .50 ,.62, '.60, .60 .70 .90 .90. -00 Hunter pumping plant 1.79 June 2, 1904 Aug. 17,1904 June 0, 1905 Sept. 4,1905 June 19,1906 Aug. 27,1906 June 25,1907 Sept. 18,1907 Sept. 9,1903 Sept. 4,1903 June 2,1904 Aug. 17,1904 June 9, 1905 Sept. 4,1905 June 23,1906 Aug. 27,1906 June 25,1907 Sept. 18,1907 Sept. 4,1903 May 12,1904 Aug. 15,1904 June 9, 1905 Sept. 27,1905 June 23,1906 Aug. 27,1906 June 25,1907 Sept. 18,1907 Sept. 4,1903 June 12,1904 Aug. 15,1904 June 9, 1905 Sept. 27, 1905 June 23,1906 Aug. 27,1906 June 25,1907 Sept. 18,1907 June — 1898 .... do 1 82 do 1.54 do 1.09 do. . 1 60 do 1.90 do 1.50 do 1 50 .....do 1.50 Hurd tract, artesian well .21 Johnson & Hubbard pumping plant .42 do .07 do .39 do : .59 do .30 do .52 do .48 do .40 do 00 Lamb pumping plant .24 ..do .25 do ? .25 do .... .30 do .00 do .00 do . . .00 do .00 do .00 Lawson Well Co., pumping plant .59 do .65 do - . .50 do .62 do .60 ... do .60 do • .70 do .90 do Logsdon & Farrell ditch .90 .72 .63 1.61 1.15 .54 1.26 .49 .20 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .72 Sept. — ', 1898 Mar — 1899 do .63 do 1.61 June —,1899 do 1.15 Aug. —,1899 Mar. —,1900 do .54 do 1.26 Jmie —,1900 do .49 Sept. —,1900 Oct. 13, 1902 Aug. 22,1903 June 4, 1904 Aug. 3, 1904 June 10,1905 Sept. 2,1905 June 18,1906 Oct. 24,1906 June 20,1907 Sept. 25, 1907 Aug. 17,1904 June 10,1905 Sept. 27, 1905 June 20, 1906 Sept. 20, 1906 June 22,1907 Sept. 20, 1907 June — 1898 do . . .20 do .00 ... do .00 do .00 do ■ .00 . do .00 do .00 do .00 .. do .00 do .00 do - .00 Lj^le Creek Water & Improvement Co. pumping plant . . . .do.. . . 4.00 .00 .00 .00 .00 .00 .00 4.00 .00 -do. . .00 do .00 .do .00 do .00 do .00 Mclntyre ditch .37 .038 .82 .15 .00 .14 .01 .00 .00 .00 .37 Sept. -1 1898 Mar. — 1899 do . . . . . .038 ...do .82 .do .15 Aug. -' 1899 Mar 1900 do .00 do .14 June ' 1900 ..do .01 Sept. — ' 19Q0 Oct. 7,1902 Sept. 9,1903 Aug. 15,1904 .do .00 do .00 .do .00 do .00 .00 SANTA AFA KIVER BASIN. 366 Natural flow, m second-jeety of return water compared ivith developed ivaier in San Bernardino Valley above Colton, Calif. Jor 1898-1907— Gontmue^, Date. Location. De- veloped. Natural. Total. June 16.1905 0.00 .00 .00 .00 .00 .00 2.54 2.08 9.40 3.86 2.00 2.30 1.57 1.69 .00 .00 0.00 Sept. 28'l90.'i ..do .00 June 22 1906 ,1906 1907 1907 1898 1898 1899 1899 1899 1900 1900 1900 1902 1903 1904 1904 1905 1905 1906 1906 1907 1907 1898 1898 1899 1899 1899 1900 1900 1900 1902 1903 1904 1904 1905 1905 1906 1906 1907 1907 1904 1904 1905 1905 1906 1906 1907 1907 1904 1904 1903 1904 1904 1905 1905 1906 1906 1907 1907 1898 1898 1899 1899 1899 1900 1900 1900 1902 1903 1904 1904 1905 1905 1906 1906 1907 1907 .do .00 Sept. 20 June 25 do .00 ... .do .00 Sept. 18 .(Jo .00 McKenzie ditch •. 2.54 Sept. - Mar. — do 2.08 .do 9.40 do 3.86 Aug. - Mar. — ..do . 2.0O do '. 2.30 do 1.57 Sept. — Sept. 30 do . 1.69 .....do .00 Aug. 17 May 13 . .do . .... .00 do.. .. do .do 0.67 .58 .67 Aug. 12 June 2 .58 .00 .00 .00 .00 .00 .00 8.42 17.00 17.00 15.48 10.45 13.94 13.78 14.68 13.40 12.87 16.30 16.75 15.70 15.50 16.90 17.10 22.30 17.10 .00 Sept. 5 do .00 June 18 ..do ' .00 Aug. 23 do .00 June 21 do .00 Set)t. 28 do . . . .00 Meeks & Daley ditch 8.42 Sept. — .do 17.00 Mar. — do 17 00 ..do 15.48 Aug. — Mar. - .do. . 10.45 do 13.94 June — .do 13.78 Sept. — do 14.68 Sept. 30 . ..do 13.40 Sept. 1 .do 12 87 May 31 do 16.30 16 75 Aug. 3 ..do L. June 9 do, 1 15.70 Sept. 2 . . .do i . . 15.50 June 28 .do. ' 16 90 Aug. 31 do ' 17. 10 June 19 .do . 22,30 Get. 3 do 17.10 May 12 Merryfield pumping plant .90 .80 .67 .40 .80 .79 .70 .70 .90 Aug. 5 .do 80 May 30 ::::.dS::..; :;:: .. .do .do. . .67 S^t. 28 .40 June 28 SO Aug. 24 do .79 June 19 . ..do 70 Sept. 18 do .70 May 21 Mount Vernon Water Co .91 .91 91 Aug. 17 do .91 Sept. 4 Orange Land & Water Co. pumping plant 1.08 1.14 1.12 .00 1.60 .00 .00 .00 .00 lies May 12 ..do 1 14 Aug. 17 do 1.12 June 9 do .00 Sept. 27 do 1.60 June 23 do .00 Aug. 27 do 00 June 25 do .00 Sept. 26 do 00 June — Rabel ditch. 5.37 3.07 2.26 1.54 .94 .54 .35 .07 .00 .00 .00 .00 .00 .00 .00 .00 .60 l.OO 5 37 Sept. — do 3.07 Mar. - do 2.26 June — do 1.54 .94 Aug. — do Mar. — do 54 June — do 35 Sept. — do. .07 Sept. 30 do 00 Aug. 17 do OO May 13 do . .00 Aug. 15 do. .00 June 2 .....do vOO Sept. 5 do . . ^fid June 14 do .00 Aug. 23 do .00 June 21 do .60 Sept. 28 do l.iOO 366 SURFACE WATER Oi' PACIFIC SLOPE, SOUTHERN CALIFORNIA. Natural flow, in se<;07id-feet, of return water compared ivith developed water in San Bernardino Valley above Colton, Calif., for 1898-1907 — Continued. Date. Location. De- veloped. Natural. Total. June —.1898 Ranchero ditch 1.75 1.64 1.64 1.00 .41 .24 .55 1.33 1 75 Sept. — Mar. — 1898 1899 1899 1899 1900 1900 1900 1903 1904 1904 1905 1905 1906 1906 1907 1907 1898 1898 1899 1899 1899 1900 IGOO 1900 1903 1904 1904 1905 1905 1908 1906 1907 1907 1904 1904 1905 1905 1906 1906 1907 1907 1898 1898 1899 1899 1899 1900 1900 1900 1902 1903 1904 1904 1905 1905 1906 1903 1907 1907 1898 1898 1899 1899 1899 1900 1900 1900 1902 1904 1904 1905 1905 1906 1908 1907 1907 1898 1898 do ... 1 64 -do. . 1 64 June — do 1.00 Aug. — .. -do. . 41 Mar. — do .24 do ... .55 Sept. — .. -do. . 0.80 1.09 1.46 1.30 1.24 1.10 2.00 1.90 2.00 2.00 4.40 4.43 4.25 2.08 2.00 6.59 5.38 3.70 8.98 7.92 2.00 7.05 8.00 3.60 6.10 4.20 5.40 .00 6.43 6.36, 7.60 l.SO 6.90 2.50 3.60 18.00 17.54 18.04 17.50 27.50 24.54 52.38 27.00 26.08 23.89 29.44 19.85 25.33 21.20 2.90 23.65 2 13 Sept. 7 i.09 May 12 .. ..do. 1 46 Aug. 17 do 1.30 June 16 do 1.24 Sept. 27 .do. . 1 10 June 20 ...do 2.00 Sept. 20 do . ] 90 June 25 do 2.00 Sept. 26 do 2.00 June — Riverside Highland Water Co. pumping plant, liytle Creek 4.40 Sept. — Mar. — do 4.43 -do ... 4 25 June — do 2.08 Aug. — . .do. ... 2 00 Mar. — .....do 6.59 .. ..do.. 5.38 Sept. — -do 3.70 Sept. 4 do 8.98 May 12 .do 7.92 Aug. 17 June 16 do 2 00 .. ..do 7.05 Sept. 28 June 20 do. - . - . . . . 8.00 do 3 60 Sept. 20 .do G.10 June 25 do 4.20 Sept. 26 do Riverside Highland Water Co., Santa Ana River. . 5.40 May 12 .00 Aug. 19 do .42 C.85 May 31 .do 6.36 Sept 4 do .40 2.50 8.00 June 20 do 4.30 Sept. 7 .do 6.90 June 20 do . . 1.60 4.10 Sept. 25 June — Sept — do 3.60 Riverside Water Co. upper canal -do 41.04 43.80 42.49 36.42 24.54 37.40 20.58 34.02 21.89 32.01 12.96 18.28 24.85 12.90 38.60 26.35 63.00 30,00 59.04 01.34 Mar. — do 60.53 JxiXif^ — .do 53.92 -do 52.04 Mar. — ..do 61.94 June — .do. . . . 52.94 Sept. — do G1.02 Sept. 30 .do 47.97 Sept 1 do 55.90 May 31 ..do 42.40 July 29 .do 38.13 May 31 do 50.18 Aug. 31 .do 34.10 Jun'^ 19 .do . . . . 41.50 Aug. 31 .Tune 19 do. . . do 50.00 63.00 Sept 26 do 16.00 1.94 2.04 .00 1.77 1.67 .00 1.88 1.52 1.20 1.32 1.38 .92 1.30 .00 .00 .00 .00 46.00 Riverside Water Co mill pumping jDlant 1.94 Sept — ... do 2.04 Mar _ do ,00 juti^ — do. -. 1.77 do 1.67 Maf - . . do .00 .Tiine — do . 1.88 Sept — do 1,52 Sept. 30 May 31 July 29 do do 1.20 1.32 do ... 1,38 May 31 do . . do .92 Aug. 31 1.30 .Tune 23 do .00 Aug. 31 June 27 do .00 do .00 Sept. 20 .Tune — . do .00 Riverside Water Co. liiune 3.12 3.36 3,12 Sept. — do.... 3.36 SANTA ANA RIVER BASIN. 367 Natural flow, in second-feet, of return water compared with developed water in San Bernardino Valley above Collon, Calif., for 1898-1907— Gontmued. Date. Location. De- veloped. Natural. Totai. Mar 1899 Riverside Water Co flume 5.30 7.29 2.56 2.67 2.17 .94 .50 .00 2.68 .00 2.24 .00 16.70 .00 .00 .00 5.30 June ' 1899 do 7.29 Aug. —,1899 Mar 1900 do . 2.55 do 2.67 June ', 1900 .. . do 2.17 Sept. — , 1900 Sept. 30, 1902 Aug. 18,1903 May 31 1904 do... .94 do .50 . . do .00 do 2.68 July 29,1904 May 31 1905 do - - .00 do.... 2.24 Aug. 31,1905 June 20,1906 Aug 31 1906 do .00 do 10.70 do .. .00 .Tune 19,1907 Sept. 20, 1907 Oct 11 1902 do .00 do .00 Riverside Water Co Hum'* purnp No. 1 2.95 4.08 1.79 2.99 3.95 3.60 .00 .00 .00 .00 2.08 2.63 1.76 2.52 3.18 3.00 .00 .00 .00 .00 5.79 9.33 9.14 4.38 4.44 .00 .00 2.95 Aug. 18,1903 May 31,1904 July 29 1904 do do--.. 4.08 1.79 do 2.99 May 26^905 Aug. 31,1905 June 25 iQ08 do do 3.95 3.60 do .00 Aug. 31,' 1906 June 27 1907 do do . . . - -00 .00 Sept, 20']907 Oct 11 1902 ...do .00 Riverside Water Co 15 ume pump No. 2 2.08 Aug. 18,1903 May 31,1904 July 29,1904 May 26,1905 Aug. 31,1905 June 25,1906 Aug. 31,1906 June 27,1907 Sept. 20, 1907 Aug. 19,1903 May 21,1904 Aug. 23,1904 Oct. 11,1902 do 2.63 .. . do 1.76 do 2.52 do - 3.18 do do 3.00 .00 do .00 do.... . - . - .00 do . .00 5.79 do 9.33 do 9.14 4.38 Aug. 19,1903 May 31,1904 Aug. 15,1904 June 6,1905 Aug. 31,1905 June 19,1906 Sept. 7,1906 June 19, 1907 Sept. 18, 1907 do do 4.44 00 . . do .m do .00 .00 do .00 1.60 2.40 .00 2.20 .60 .50 .30 .00 .50 .00 .00 ,40 .00 do.... 1.60 do--. 2.40 do .00 do 2.20 May 21,1904 Aug. 12,1904 June 6, 1905 Sept. 28, 1905 June 28,1906 Aug. 24,1906 ,60 ,. . do .50 do. .. 30 do .00 do .50 do do . .00 June 19,1907 Sept. 26, 1907 Juno — 1898 ,00 do .40 Shay or Stout dam ditch 2.30 2.08 2.23 1.13 .90 .507 .40 .16 .00 ,00 .09 .00 .00 .00 .00 .24 2.60 1.30 1.00 1.02 .85 '.m 2 30 Sept. — , 1898 Mar, —,1899 do 2.08 do---- 2.23 June —,1899 do 1.13 Aug. —,1899 do .90 Mar — , 1900 do 507 June —,1900 do .-W Sept. — , 1900 do .16 Sept. 30, 1902 Aug, 17,1903 May 13,1904 do-..- 00 do .00 do .00 Aug. 15,1904 do .00 June 2, 1905 Sept. 5,1905 June 25,1906 do .00 do .00 do .. 00 Aug. 23,1906 do . - . - .24 June 21,1907 .. do 2.60 Sept. 28, 1907 do 1.30 June —,1898 ■Swamp ditch 1.00 Sept. — , 1898 ... do 1.02 Mar. —,1899 do- . .85 June —,1899 do-...-.. Aug. —,1899 do .69 36B SUEFACE WATER OF PACIFIC SLOPE J SOUTHERIT CALIFORNIA. Natural flow, in second-feet, of return water compared with developed water in San Bernardino Valley above Colton, Calif, for 1898-1907— Contmxied. De- veloped. 1899 1»99 1900 1900 1900 1902 1903 1904 1904 1905 1905 1906 1906 1907 1907 1903 Swamp ditch.. do do do.--. ..do.. ..do.. ..do.. ..do-. ..do-, -do.. .do-. ..do-, .do.. Ward & Warren ditch . . .do do ..do-. ..do.. ..do.. ..do-. ..do-. ..do.. .do.. ..do.. .do.. 1.60 .615 1.56 1.60 1.60 .53 .30 1.44 ..do.. ..do.- . . do. - .do.. ..do.. .do-. West Riverside Water Co. 350-inch pinnping plant. do ....do . ...do . ...do ...do .... ...do : ...do ...do do W^hiting ditch do ; 5.94 3.41 6.52 5.35 2.00 5.60 6.00 6.50 do do do ....do ....do ....do do do ....do do do ....do do do Whiting ditch... Whitlock ditch.. do .do ..do.- ..do-. -do-. .-do.. ..do-, -do.. .do., .do. -do-- .do.. .do. .do., .do., .do-. .42 .51 .47 .47 .40 .80 .64 2.20 1.00 .72 .72 1.49 .95 .10 1.58 .17 .00 .00 .00 5.10 .06 2.10 .00 Wozencraft tract, artesian well . . .01 .76 .246 .01 1.12 .13 .00- .00 .00 .00 .00 .00 .00 .00 .00 .00 .34 .38 .47 .28 .00 .00 .00 .00 .00 .00 .00. .00 .00 .00 .00 .00 SANTA AKA RIVER BASIN. 369 Return waters, in second-feet, in San Bernardino Valley below Slover Mountain and above Riverside Narrows, Calif., for 1898-1907, [By K. Sanborn, engineer Riverside Water Co.] Date. J..ocation. De- veloped. Natural. Total. Sept. 29, 1902 Alvitrez diteh at headgate, east end of West Riverside Bridge Sec.-ft. Scc.-ft. 1.96 3.10 1.63 2.23 3.00 1.30 5.20 5.00 .70 2.50 Sec.-ft. 1.96 Aug. 20, 1903 May 13,1904 Aug. 8,1904 May 27,1905 Aug. 11,1905 June 27 1906 . .do 3.10 do 1.63 do 2.23 .do . . 3.00 do 1.30 do 5.20 Aug. 28,1906 June 24 1907 . .do 5.Q0 do.... .70 Sept. 19, 1907 June 29, 1906 do 2.50 California Orange Co., pumping plant. 1.30 1.40 .00 1.50 2.45 2.50 2.25 2.50 2.50 .00 2.50 1.30 Sept. 7,1906 June 24 1907 .do 1.40 do . .00 Sept. 20, 1907 Aug. 18,1904 June 6, 1905 do 1.50 Cuttle's pumping plant 2.45 .do 2.50 Oct. 4 1905 do . 2.25 June 29, 1906 do 2.50 Sept. 7,1906 June 24,1907 .do 2.50 do .00 Sept. 20, 1907 Sept. 29, 1902 .do 2.50 Evans Island or Jansen ditch, under west end of West Riverside Bridge 5.35 4.71 3.43 .00 .00 .00 .00 .00 4.70 .00 2.17 .81 2.53 .00 .00 .50 1.90 .00 .00 .00 .53 .70 2.03 1.31 2.30 .00 1.70 .00 5.70 .00 5.35 Aug. 20, 1903 May 13,1904 Aug. 8,1904 May 27,1905 Aug. 11,1905 June 29 1906 do . 4.71 ..do.. = .. 3.43 .do .00 ....do.... .00 .do .00 do .00 Sept. 3,' 1906 June 24,1907 .do.... .00 do.. . ... 4.70 Sept. 19,1907 Sept. 29, 1902 Aug. 21,1903 May 16,1904 Aug. 11,1904 .do .00 Evans ditch near Riverside County line. . . 2.17 do .81 do 2.53 do .00 May 29,1905 Aug. 11,1905 Jime 26,1906 .do - .00 do - .... .50 .do 1.90 Sept. 3,1906 June 19 1907 do .00 do .00 Sept. 20' 1907 Sept. 29, 1902 Aug. 22,1903 May 16,1904 Aug. 11,1904 May 29,1905 Aug. 14,1905 June 25 1906 do.. . .00 Evans or Smith ditch, 1 mile below Riverside County line. . .53 do ' '. .70 ....do 2.03 do 1.31 do 2.30 .do .00 do ..." . . 1.70 Sept. .3,1906 .Tune 19,1907 .do .00 .do.... 5.70 Sept. 20, 1907 June 2, 1904 do .00 Evans well ditch, Santa Ana Street : .51 .04 .00 1.70 .51 Aug. 8,1904 May 29,1905 Aug. 9,1905 June 23.1906 do .04 . .do .00 do ... 1.70 ...do .00 .00 .00 .00 Sept. 3; 1906 June 19,1907 .do.... .00 do .00 Sept. 23,1907 June 3 1904 .do.... .80 .80 Evans pipe line to China Gardens at headworks 1.41 .00 .00 .00 .00 .00 1.40 .00 1.S Aug. 8,1904 May 30,1905 Aug. 11,1905 June 29,1906 .do .00 do . . . .00 ...do .00 .do .00 Sept. 13,1906 June 24,1907 do .00 ..do 1.40 Sept. 19,1907 Aug. 8, 1904 do .00 Evans pumping plant, 1,000 feet south of west end of West Riverside Bridge. . . 3.03 2.87 4.20 3.60 5.53 .00 3.03 May 27,1905 Sept. 5,1905 Jime 27,1906 do 2.87 .do.-.. 4.20 do 3.60 Aug. 28,1906 .do...... 5.53 June 24,1907 do .00 Sept. 19, 1907 do .66 .00 142131°— 21— wsp 447- -24 370 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Return waters^ in second-feet^ in San Bernardino Valley below Slover Mountain and above Riverside Narrott's, CttUf^y for 1898-1907— Continued. Date. Location. De- veloped. Natural. Total. Aug. 18,1964 Evans Jurupa pumping piant Sec.-ft. 2.00 2.00 .00 .00 .00 8ec.-ft. Sec. ft. June 19 1905 1905 1908 1907 1907 1904 1904 1905 1905 1906 1906 1907 1907 1904 1904 1905 1905 1906 1906 190f7 1907 1904 1904 1905 1905 1906 1906 1907 1907 1898 1898 1899 1899 1899 1900 1900 1900 1900 19m 1904 1904 1905 19(6 1906 1906 1907 1907 19015 1906 .1906 1906 ,1907 ,1907 1904 1904 ,1905 ,1905 1906 1906 1907 1907' 1905 1905 1906 1906 1907 1907 1906 1907 1907. 1902 1903 1904 1904 1905 1905 1908 do „ 2.00 Oct. 4 ....do 09 June 29 do.-... .00 June 24 do 00 Sept. 19 June 3 .do 0.00 1.72 1.71 2.20 2. CO 2.90 3.25 .00 1.10 .8G .92 .00 1.20 .76 .00 1.60 .00 00 Ferris Gailasier ditc^i near headworlcs... . 1 72 Aug. 8 .do i 71 Mav 30 do 2 20 Aug. 14 do ■^.00 June 30 .do 2 90 Sept. 13 June 24 do- 3 25 ..do .G& Sept. 19 June 3 do..-. 1 10 Galls c:ber ditch .86 Aug. 18 May 30 .do...- . ... 92 do .00 Aug. 14 .do 1 20 June 30 do .76 Sept. 13 June 24 .do .00 do... 1 W Sept. 19 June 3 ...do .00 Jurupa pumping plsnt, to supply Rub^doux ditch .00 4.35 2. 10 4.80 2.30 5.20 .00 4.80 00 Aue;. 11 do .do 4. 35 May 59 Aug. 15 June 26 2.10 do.... 4 80 -do 2.30 Sept. 3 June 22 do--- - . .. - . 5 20 do .00 Sept. 23 June — .do 4 80 Lower ^nal, RrpBrside Water Co. . . 10.3 7.70 16.20 9.09 7.38 8.00 7.16 7. 13 6.69 3.07 2.05 3.15 .39 2.20 .00 3.10 .00 1L70 .00 10 30 Sept. — -do 7.7a Mar. — do---. 16 20 June — do 9.09 Aug. — do . 7.38 Mar. - do 8,00 .do 7.16 July 27 do 7 13 Sept. - Sept. 29 Aug. 21 .. ..do 6.69 do 3,07 do . 2 05 May 21 .. .do 3.15 Aug. 11 May 30 do ... .39^ do.... :.... 2.20 Sept. 5 June 27 .do .00 do 3 W Sept. 3 June 19 do .00 do - 11 70 Sept. 23 June 6 do .oa 2.hb 2.25 1.30 2. .50 2. 50 1.50 2.50 Oct 4 do 2. 25 ...do 1.30 Sept. 7 June 24 do do 2.50 2 50 Sept. 23 May 16 Am. 18 do Riverside Power Co. canal at Pedley crossing 1.50 38,30 29.50 30.60 27.00 27. 70 35.00 49. 50 36.09 38.30 do 29.50 Jime 15 do 30.60 Sept. 22 June 21 do 27.80 do 27.70 Sept. 29 June 26 do 35.00 do ... - 49.50 Sept. 19 June 19 do 36.00 .89 .60 .80 .70 L35 1.00 .83 2.30 .00 .80 Oct. 4 do . . ^ ... . . .§0 TuHft 99 Rivino Land Co. pumping plant No. 1 .m Sept. 7 June 24 .do .70 do .. 1.35 Sept. 23 Sept. 13 Jime 26 do i.m .83 do 2.30 Sept. 23 Sept. 29 Aug. 21 May 16 do .00 7.19 4.78 6.49 2.82 4.92 7.20 4.40 7. 19 do .. .. . 1.74 6.52 do 8.4& Aug. 8 do 2.82 May 29 Aug, 15 do 4.^ do : 7.3a June 26 do 4.40 SAIS" GABRIEL. EIVEE BASIK. 371 Return ivaters, in second feet, in San Bernardino Valley belotv Slover Mountain and above Riverside Narrows, Calif., for 1898-1907 — Continued. Date. Location. J^e- veloped. Natural. Total. Sept. 3,1906 June 19,1907 Sept. 23, 1907 Oct. 10,1902 Aug- 25,1903 Aug. 8,1904 May 29,1905 Aug. 11,1905 June 26,1906 Sept 3,1906 June 22,1907 Sept. 24, 1907 Aug. 8,1904 May 27,1905 Aug 11,1905 Ponbidoux ditch at measuring box Sec.-ft. Sec.-ft. 2.00 9.80 1.60 43.25 40.70 Sec.-ft. 2.00 .do 9.80 do 4.80 6.40 Santa Ana River at Riverside Narrows 43.25 do 40 70 Spanishtown, ptinQ)ing plant at wier at end of main do ... . 3.22 4.17 2.60 4.60 .00 .00 .00 3.22 4.17 .do 2.60 do A. 60 . ..do .00 do .09 do .00 Springbrook, pumping plant at weir at end of main 4.84 5.58 3.60 4.84 do 5.58 .. .do 3.60 June 23 1906 do .09 .00 .00 .00 Sept. 3,1906 June 22,1907 Sept. 24, 1907 Ausj. 8, 1 904 do. .00 do .00 do .00 1.49 3.20 2.70 6.60 5.30 1.90 3.70 .00 1.08 1.40 1.20 2.20 .00 .00 .00 .00 Soquel ditch 1.49 May 27,1905 Axig. 11,1905 June 27,1906 Aug. 28,1906 June 24,1907 Sept. 19, 1907 June 3,1904 Ang. 8,1904 May 30,1905 Aug. 14,1905 June 30,1906 Sept. 13, 1906 June 24,1907 Sept. 19,1907 do 3.20 ....do 2.70 do 6.60 do 5.30 do L90 do 3.70 Zimmerman pipe line .00 do 1.08 do 1.40 do 1.20 do 2.20 do .00 do ... .00 do .00 SAN GABKIEL, RIVER BASIN. GENERAL FEATURES. San Gabriel River is one of the three most important streams traversing the valley of southern California, Its drainage basin lies wholly in Los Angeles County west of the Santa Ana basin and east of the Los Angeles basin and stretches from the crest of the Sierra Madre to the Pacific, a distance of about 50 miles. Its total drain- age area is about 700 square miles, about one-third of which consists of mountain slopes, which contribute practically all of the run-off except in heavy storms. The remaining two-thirds is em- braced in the San Gabriel Valley at the base of the mountains and in the coastal plain southeast of the city of Los Angeles. The mountainous part of the basin is somewhat rectangular in shape. Its length east and west is about 25 miles and its width about 10 miles. It lies on the southern slope of the vSierra Madre, opposite the basins of Rock and Little Rock creeks, at the north, and on the southern slope of the San Gabriel Range, through which the river breaks near Azusa and enters the San Gabriel Valley. The main stream is formed by the junction of two principal forks, one from the north and east and the other from the west. Each of the branches receives many tributaries from the crests of the sur- 372 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. rounding ranges. The headwaters come from the western slope of San Antonio Peak (Old Baldy), altitude 10,080 feet, and from the southern slope of other high peaks at the north, such as North Baldy and Islip mountains. The west fork drains the northern slope of Mount Wilson, the eastern and northern slopes of San Gabriel Peak, and a portion of the southern slopes of the main range to the north. It joins the main stream about 8 miles above the mouth of the can- yon. The general course of the stream is southwestward. After leaving the mountains it traverses San Gabriel Valley in a wide wash of sand, gravel, and bowlders, then breaks through the range of foothills separating San Gabriel Valley from the coastal plain at a point called The Narrows, about 5 miles northwest of Whittier, and enters the coastal plain, across which it flows to its mouth in Alamitos Bay, a few miles east of Long Beach. The total length of the stream is about 65 or 70 miles. The principal tributaries of vSan Gabriel River are Fish Fork and Cattle Creek from the east and Iron and West forks from the west. Altitudes in San Gabriel basin range from 20 to 200 feet on the coastal plain, from 200 to 900 feet in San Gabriel Valley, and from 1,000 to 10,000 feet in the mountains. The range of foothills near Whittier has an altitude of about 1,250 feet. The topography is rough and rugged in the mountains, especially in the upper part, where deep and narrow canyons exists The geologic formation is granitic, with a light soil covering The San Gabriel Valley is more or less rolling and is composed of granitic wash from the mountains. The basin is rather poorly forested, having a sparse timber growth on the higher slopes and brush and some scattering timber on the middle and lower elevations. The mean annual precipitation in this basin varies from 15 to 20 inches in the valley area and from 20 to 40 inches in the mountains. It occurs almost entirely as rain except on the higher peaks, where snow falls during the winter. On the northern slopes snow remains for several months. The total summer flow of the stream is used for irrigation, and the same water may be put to use several times in its journey from moun- tain to sea. About 5 miles above the mouth of the canyon a power canal, with a capacity of about 100 second-feet, takes water from the left bank of the stream and delivers it to irrigation canals below the wheels near the mouth of the canyon for irrigation in San Gabriel Valley. Some other small diversions are made in the spring months at and below the mouth of the canyon for the same purpose. Most of the excess water issuing from the canyon sinks into the sands and gravels of San Gabriel Valley to augment the underground basins, which are drawn upon for irrigating the lower part of the valley. SAN GABRIEL RIVER BASIlSsT. 373 Above The Narrows at the lower end of the valley the underground flow is forced to the surface by a bedrock obstruction, and this water, with additional water developed from many w^ells, is diverted through ditches for irrigating the higher parts of the coastal plain. The seepage loss from irrigation joins the body of underground water and is recovered from pumped and flowing wells in the lower coastal plain. Storage sites are practically lacking in this basin and opportunities for power development are not great. Probably not more than one-fifth as much power could be obtained in this basin as in the basin of the Santa Ana. GAGING- STATION RECORDS. SAN GABRIEL RIVER ABOVE FISH FORK, NEAR AZUSA, CALIF. Location.— About 300 feet above junction of Fish Fork with San Gabriel River, in NE. I sec. 32, T. 3 N., R. 8 W., in Angeles National Forest, about 15^ miles north- east of Azusa, Los Angeles County. Records available.' — 1900, 1901, 1910, and 1912 (low-water record only). Elevation. — About 3,300 feet above sea level. Drainage area. — 20.7 square miles. Discharge.' — Computed from gage-height record giving head on weir. Cooperation. — Record furnished by Pacific Light & Power Corporation, through G. O. Newman, engineer. Low-water record of daily discharge, in second-feet, of San Gabriel River above Fish Fork, near Azusa, Calif ., for 1900, 1901, 1910, and 1912. ray. ' 1900 1901 1910 1 • 1912 July. Aug. Sept. Oct. Aug. Sept. July. Aug. Sept. July. Aug. Sept. 1 . . ...... 2.2 2.5 2.5 2.4 2.3 2.3 2.1 2.1 2.1 2.2 2.1 2.2 2.1 2.1 2.0 2.1 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.2 2.0 2.0 2.0 1.8 1.8 1.7 1.7 1.7 1.8 1.8 1.8 1.7 1.7 1.7 1.7 1.8 1.8 1.9 11 10 10 10 9.9 9.9 9.9 9.8 9.5 9.6 9.5 9.4 9.4 9.4 9.3 9.2 9.2 9.2 9.1 9.1 9.0 """s.'e" 8.4 8.4 8.3 .8.3 8.3 8.2 7.9 7.5 7.5 7.5 7.5 7.3 7.3 7.2 7.3 7.2 7.2 9.8 8 1 2 6.7 6.7 6.0 6.0 5.5 5.6 5.6 5.3 5.5 5.6 5.4 5.5 5.8 5.8 5.5 5.5 5.4 5.5 5.2 5.4 5.4 4.9 4.5 5.1 3 1.7 1.8 1.8 1;8 1.8 1.8 1.8 1.8 1.8 2.0 1.9 1.9 1.8 1.7 1:? 1.7 1.6 1.7 1.7 1.7 1.7 1.7 1.7 1.6 1.6 1.7 1.7 2.0 "i.'s" 1.8 1.7 1.8 1.7 1.8 1.8 1.8 1.7 1.7 1.7 1.7 1.6 1.6 1.8 1.9 1.8 1.8 1.6 1.6 i;7 1.8 5.2 5.2 5.3 5.0 5.0 4.8 5.0 5.0 5.0 4.9 4.9 4.9 4.7 4.7 4.7 4.7 4.8 4.8 4.9 4.9 4.7 4.5 4.4 4.4 4.4 4.4 10 13 12 12 12 12 12 12 12 12 13 12 12 12 12 12 12 12 11 11 11 11 4 5 6 7.8 7 9.8 8 9 10 7 7 11 9.1 12 6.9 6.8 6.8 6.8 7.0 7.1 7.1 7.0 7.0 7.0 7.0 7.1 6.8 6.8 6.8 6.7 6.7 6.7 6.8 10 13 14 15 16 7 5 17 9.3 18 19 10 20 21 8.9 22 6.8 23 10 24 . . . 25 10 8.4 26 6 6 27.... 28 29 30 4.9 4,9 10 31 374 SUEFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. SAN GABRIEL RIVER AT HEADWORKS WEAR AZUSA, CALIF. Location.— In SE. i sec. 31, T. 2 N., K. 9 W., at foTd 500 feet above intake of South- ern Califoraia Edison Co.'s canal, and about 6 miles northeast of Asusa, Los Aagele? County. Drainage area. — -Not measured. Elevation. — Abont 1,200 feet above sea level. Records available. — -December 9, 1912, to January 14, 1914. Gage. — Vertical staff bolted to granite cliff on right bank Just above ford. This gage was destroyed by the flood of February, 1914. Discharge measurements. — ^Made from cable at gage or by wading. Channel and control. — Gravel and boulders; shifts during high water. Extremes of discharge. — 1912-1914: Maximum stage recorded, 15.0 feet Feb- ruary 20, 1914 (discharge unknown); minimum stage recorded, 4.95 feet October 1, 2, 18 to 21, 26, and 27 (discharge, 14 second-feet). x\ccuRACY. — Stage-discharge relation not permanent. Rating curves fairly well defined. Gage read to hundredths twice daily; more frequently during floods. Daily discharge ascertained by applying mean daily gage height to rating table. Records fair. Cooperation. — Gage-iieight record furnished by Pacific Light & Power Corporation. Discharge measurements of San Gabriel River at headivorks near Azusa. XMif.,for 1912- 1914. Date. Made by— Gage hcigbt. Dis- cbarge. Date. Gage height Dis- charge, 1912. Nov, 27 F. C.Ebert Feet. 4.68 4.71 4.74 5.49 5.42 Sec.-ft. 31 31 44 175 100 May 28 ^ July 3 Aug. 11 Sept. 27 1914. Jan. 12 F. C.Ebert Feet. 5.36 5.16 5.00 4.97 5.15 Sec.-fL '70 1913. Jan. 11 F. C. Ebert do V^V.dol'//""".'.'".'.'.'. F. C. Ebeit..-. 34 18 Feb. 5 9 Apr. 22 do do H. D. McGlashan 15 39 Daihj discharge, m second-feet, of San Gabriel River at headworks near Azusa, Calif., for 1912-1914. Day. ;c. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 31 28 40 250 160 90 60 37 18 18 Hi) 28 40 230 155 90 60 37 18 18 30 28 40 220 150 90 52 37 18 18 30 28 40 225 145 90 52 37 18 18 30 28 40 220 145 90 60 37 18 18 29 28 40 215 140 90 52 30 18 18 28 28 60 230 135 90 52 30 18 18 28 28 417 215 135 85 62 30 18 18 28 33 177 210 135 85 52 30 18 18 28 33 143 195 130 85 52 30 18 18 28 33 112 200 130 85 52 30 18 18 2K 33 93 190 130 85 44 24 18 18 28 33 84 180 130 80 44 24 18 18 28 33 75 175 130 80 44 24 18 18 28 75 75 165 120 80 44 24 18 18 28 132 68 160 115 80 44 24 18 28 132 68 150 H)G 75 44 24 18 18 28 84 68 155 115 80 44 24 18 18 28 68 60 155 115 75 44 24 18 28 CO 60 ISO 100 70 37 24 14 28 53 60 150 100 70 37 30 18 28 46 75 145 100 75 37 30 18 28 40 60 145 100 70 37 24 18 28 40 i 1,160 140 100 65 37 24 18 28 40 1,150 140 100 65 44 24 18 28 40 580 135 95 65 44 24 18 28 40 370 133 95 65 60 30 18 28 40 235 130 95 69 60 30 18 28 40 130 95 60 44 24 18 28 40 145 95 60 44 24 18 28 40 155 60 24 18 25-. 26.. SAN GABRIEL EIVEE BASIIT. a75 Daily discharge, in second-feet, of San Gabriel River at headworl-s near Azusa, Calif., for Bay. Oct. ; Nov. Dec. Jaa. Dajr. 0«t. ■ Nov. Dee. Jan. 1913-14:. 1 1.4 M 18 18 18. 18 18 18 18-. 18. 18 18 18 18 18 18 24 18 18 18 IS 18 IS- IS IS- IS 24 110 69 44 37 37 37 37 a7 30 30 30 30 30 30 44 44 44 ! M 3.7 37 3T 37 37 37 37 ; fa m3-I4. 16 18 18 14 14 14 • 14 18 IS 18 18 14 14 18 '. 18 18 18 37 37 44 177 78 60 &2 52. i 44 44 44 44 37 ; 37 37 30 30 30 30 30 30 44 60 44 44 44 44 44 44 44 44 2 17..:- 3 18 4 19 5. : 20-.. S 21 7 22:. 8 ! ^ 9 ■ 2#..... 10 25 11 23 12 27 13 28 14 '29 15 30 zi N"OTE.— Daily cHscliarge Dec. 9, 1912, to Feb. 24, 1913^ determined from rating curve poorly defined above 300 second-feet; May 28 to Sept. 30, 1913, froHi fairiy welt defined curresr Nov. 27 to Dec. 8, Pacific Light & Power Corp.'s record used; Feb. 25 to May 27, 1913, by Sbifting-coiattrol method. MomtMy: diseharge of Sun Gahriel B iver at headworhs near Azusa, Calif .y for 1B12— 1914. Month. Discharge in second- 1 feet. \ Run-off eoNTROL.— Gfavei and beutldem; shift® during' high water. Left bank is M^ and rocky; right bank low and e&vered with bru-sh. One channel at all 376 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Extremes op dischakge. — 1894-1918: Maximum stage recorded, 12.0 feet January 18, 1916 (discharge, 40,000 second-feet) ; no flow for several months each year. Diversions. — Power canal of Southern California Edison Co., which heads about 5 miles above station, was completed in 1898. Water is occasionally diverted through tunnel, about 500 feet above ford, for irrigation. When it is measured, the discharge is included in tables of combined daily and monthly discharge. Regulation. — None. Accuracy. — Stage-discharge relation not permanent. Rating carves fairly well de- fined. Gage read to hundredths once daily; water-stage recorder used in 1918. Daily discharge ascertained by applying daily gage height to rating table or for periods not covered by rating curves, by shifting-control method. Records fair; those obtained previous to completion of Southern California Edison Co.'s canal, unsatisfactory. Discharge measurements of San Gabriel River near Azusa, Calif., for 1895-1918, Date. Made by- Gage height. Dis- charge. Date. Made by — Gage height. Dis- charge, 1895. Nov. 5 J. B. Lippincott do .....do J. B. Lippincott '!!!!do!!!!!"!!!!!!!!!! do . Fed. 1.5 "'i'b" 1.35 2.27 Sec-ft! 10.4 b.O 27.3 4.9 69.9 fc.O 19.9 b.O b.O 4.5 57.8 1,725 422 410 162 76.0 6.0 6.0 6.0 6.0 6.0 7.6 3.5 1901. Jan. 7 Feb. 4 5 22 Mar. 5 29 July 11 Sept. 19 1902. Jan. 25 Feb. 26 Mar. 6 Apr. 8 June 12 Sept. 1 1903. Jan. 29 Feb. 5 Mar. 23 25 May 23 June 10 13 Sept. 14 1904. Mar. 18 Apr. 8 19. 1905. Feb. 10 17 Mar. 12 14 16 24 31 Apr. 13 19 May 2 9 June 5 23 July 5 Nov. 4 1906. Jan. 19 20 20 Feb. 10 15 15 17 S. G. Bennett Feet. 6.16 2.30 7.6 4.1 3.0 2.25 Sec.-ft. o2, 710 Dec. 11 21 1896. Feb. 19 Mar. 22 Apr. 30 do '. '. ". ". '. do.'. . . .' .' ." .' ." ." .' ." ." .' ! .' .' ! 112 a6,250 700 248 96.5 6.0 15.6 Jiine 17 W. B.Clapp... July 22 J. H. Quinton Nov. 22 J. B. Lippincott 6.0 1897. J. B. Lippincott .....do... ::;::t.;:::;::::::::::: .....do do .....do A. S. Campbell 1.28 2.00 5.1 3.4 3.3 2.6 2.08 J. B. Lippincott J. Ahern 2.05 1.57 1.4 . 126 46.2 Jan. 10 25 Feb. 1 S. G. Bennett , ' W.B . ciapp '.....'. '. .... 26.0 6.0 2 Mar. 12 Apr. 29 May 24 June 30 C.A.Miller 3.20 1.70 1.05 3.50 7.95 2.20 1.70 1.50 467 AV. B.Clapp 56 ".'.'.'.do..............'.'.'.. 11 July 5 Aug. 7 Sept. 1 29 Nov. 13 27 j'.'b. Lippincott. . "..'.. ■*"2.*33' 2.2 2.1 570 8,430 97 38 20 28 ....do 1898. J. B. Lippincott H. F.Crowe 1.38 23.3 6.0 6.0 6.0 1.5.4 6.0 6.0 '""b'.b 6.0 15.9 12.0 16.0 2.0 1.0 6,0 Jan. 12 W. B.Clapp 1.30 1.58 2.20 3.50 9.30 5.30 5.80 4.20 3.80 3.45 3.30 4.12 3.50 2.91 2.60 2.28 14 Mar. 8 Clapp and Webb E. C. La Rue 38 Apr. 2 May 10 17 J. B. Lippincott ... do do F. H. Olmsted 1.03 190 July 1 21 II S Hawley 560 J. B, Lippincott 11,055 2,030 3,225 611 400 Aug. 16 21 y/^'Ao'^v//^v.'.'^'.'.'.'.'^ W. B.Clapp R.S. Hawley 22 23 do do '.'.'.'.'.do'.'..'.'.'.'.'.'.'.'.'.'.'.'.'.'.'. '.'.'.'.'.do..'.'.'.'.'.'.'.'.'.'.'.'.'.'.'.'. do W. B.Clapp 1899. Jan. 11 12 J. B. Lippincott 1.16 1.08 .90 .78 .70 262 190 553 13 288 14 41 15 16 Aug. 26 Oct. 14 'h." F.* Parkinson .'.' "'.'.'. Hawley and Clapp W. B.Clapp 17 6 00 *"i."i6' 13". 49.0 19.0 38.0 26.0 9.0 6.0 M P Beeson 3.88 2.90 2.95 1.70 2.70 2.70 2.60 1900. H. F. Parkinson 375 ".'do. ........'.'.'.'.'. 104 4 110 May 5 do do do do......: 3.5 60 11 69 Nov. 21 S. G. Bennett a Computed by Kutter's formula. 6 Stream dry. SAN GABRIEL RIVER BASIN. 377 Discharge measurements of San Gabriel River near Aziisa, Calif., for 1895-1918 — Goii. Date. Made by — Gage height. Dis- charge. Date. Made by- Gage height. Dis- charge. 1906. Feet. Scc.-ft. 1911. Feet. Sec.-ft. Mar. 12 M. P. Beeson 6.60 4,940 Feb. 14 W. V.Hardy 4.12 503 13 .....do 5.90 3,360 18 do : 3.90 371 13 do 5.40 2,530 Mar. 14 do 5.52 2,110 14 do 4.40 1,210 23 do 5.10 963 17 do 5.28 2,190 Apr. 16 do 4.60 .580 17 do 5.15 2,140 21 do 4.20 350 18 do 4.70 1,440 May 16 do 4.10 214 21 do 4.00 666 June 2 do 3.90 121 21 do 4.00 688 22 do 3.70 76 30 do 5. 10 1,380 Nov. 4 Ebert and Lee do Apr. 4 do 4.50 757 18 do 3.80 394 1912. 18 do 3.80 436 Mar. 19 F. C. Ebert 3.73 132 May 11 do 3.30 209 21 do 3.82 109 11 do 3.30 212 Apr. 9 do 4.13 183 June 1 do 3.55 292 May 17 do 3.70 82 1 do 3.55 273 29 do 3.53 43 29 C.H.Lee 2.90 2,20 157 25 1913. July 30 W. B.Clapp Dec. 28 W.B.CIapp andR.S. Hawley Feb 10 F. C. Ebert 3.07 54 5.20 1,500 11 25 do do 2.98 5.25 25 1,880 1907. Max. 3 do 3.59 124 Jan. 2 Clapp and Martin W. F. Martin .... 3.03 169 4 W. H. Spear 3.59 137 9 4.88 4.3 1,110 706 Apr. 2 22 F C Ebert 3.38 3.07 64 19 do H. D. McGIashan 27 Feb. 7 do do 4.8 4.2 1,020 618 May 7 F. C. Ebert 2.91 18 28. Mar. 5 do 7.4 5,980 1914. 5 do 7.0 5,060 Jan. 12 F.C. Ebert d.O 6 do 6.5 3,660 Feb. 10 do a 1,46 288 6 do 6.4 3,310 15 do al.l7 205 8 do 6.0 2,590 19 do 6 7.90 4,560 8 do 6.0 2,630 Apr. 14 do M.94 294 13 do 5.2 1,400 30 do &4.93 277 13 do 5.15 1,350 May 7 do M.89 221 27 .....do 6.3 2,020 16 do 6 4.87 197 27 .....do.. 6.2 1,900 June 2 . do 6 4.71 132 Apr. 5 do 5.4 1,240 24 do cl.65 65 5 .....do 5.4 1,290 29 do cl.57 53 15 do 5.0 893 July 6 do cl.20 19 30 W.B.CIapp 4.4 460 13 do cl.02 12 May 24 do....:.. 3.9 258 20 do C.87 5.7 June 13 do 3.6 192 27 do C.70 3,0 28 do 3.35 141 Aug. 3 do d.O July 11 .....do 3.1 88 Dec. 23 do .94 23 29 W.F.Martin 2.8 2.1 53 2.8 28 do 2.1 Aug. 22 do 1915. 1908. Feb. 18 F. C.'Ebert 5.95 420 Jan. 27 AV. F. Martin 3.8 5.6 271 1,885 22 25 do do 5.80 5.85 351 Feb. 3 do 404 19 do 3.35 127 Mar. 13 do 5.56 256 Apr. 14 28 W. B. Clapp ... . 3.2 80 17 do 5.62 274 do 3.1 73 22 do 5.54 262 May 18 W.F.Martin 2.85 47 24 do 4.73 262 26 W. B.Clanp 2.55 31 Apr. 9 do 4.67 220 June 13 do....:.. 4 25 May 13 . .do 4.52 4.84 166 do 286 1909. June 15 do 4.13 69 ' Feb. 26 Clapp and Martin W.F.Martin 4.5 307 28 do 1.48 23 Mar. 22 4.95 697 July 5 do 1.48 27 Apr. 28 May 14 W.B.CIapp 4.4 296 17 .do. . . . ... 1.16 3.5 do 4.2 230 June 3 do 3.62 110 1916. 22 do do 3.4 3.1 62 27 Jan. 3 4 F.C. Ebert 1.82 1.62 63 July 8 do 39 . 21 do 1.8 12 do 2.03 107 Dec. 18 J. E. Stewart 3.28 24 13 do 1.88 76 15 2.08 117 1910. 17 do. 10.30 18,400 Jan. 3 J. E. Stewart 5. 10 1 870 18 do 11 50 32,400 4,300 29 B. E.Haines 3.60 267 19 do 7.38 Feb. 28 Clapp and Stewart W.B.CIapp 3.15 80 19 do 7.10 3,750 Mar. 30 3. .30 108 20 do 6.62 2,380 Apr. 12 J.E.Stewart 3.10 84 21 do 6.34 1,570 29 W.B.CIapp 2.80 43 24 do 5.80 848 May 5 do....*.^ 2.63 23 Feb. 10 do 5.07 638 13 do 2.24 6 14 do 4.98 541 June 3 do 1.85 do 25 do 4.62 346 a Temporary gage installed Feb. 10, 1914. 6 Old gage at original section at the ford. c Temporary gage installed June 11, 1914. d Stream dry. 31 S SURFAC]-: WATER 0¥ PACIFIC St.OPE,, SOUTHERN CALIFORNIA. Discharge vieasurements. of San Gabriel River neax' Azusa.^ Calif., Jqj' 18.9.5-1918 — Gomtd.. Made by- Gage height. Bis- cfiarge. Made by^ — height. Dis- charge. 1916. Feb. 26 Mar. 2 Apr. 25 May- 1 19 31 June- 5 10 30 Oct. 25 1917. Jan. 3 26 Feb. 9 15 1'. C. Ebert-. do do .do. . H. J. TompM-as F..C. Ebert. Dortand TompMns.. do - F. C. Ebert .do-- H. J. Tompkins. . F. C. Ebert 7.G. Bort... F,C. Ebert J. C. Bert -. H. J, Tompkins. . do F.C. Ebert H..J. Tompkins.. F. C. Ebert ....do H. J. TomT>kLns. . je. e. Bort: H. J. Tompkins^ . F. C. Ebert do do H. J. Tompkins. . F. C. Ebert do.—. Feet. 4.92 4. 90 4.92 4.74 4. 45 L34 .92 .59 .52 .40 .19 ~.ia S£C.-ft. 525 335 283 104 92 54 m 36 22. 582 74B. 173; 133: 92 1917. Mar. 26 Apr. 7 19: 25 May 17 Apr. F. C. Ebert. . .do-- H. J. Tom,pkiH,s. . do F. C. Ebert .-..do. F. C. Ebert . ....do-- do do do e.w. sopp.- -do. . .do.. H.. J. Tompkixis. . do.-...^ P. C. Ebert H. J. Tompkins. ....do.. .do.. F:.C. Ebert. C. W. Sopp . F. C. E.bert. G. Vv\ Sopp. _-..do F. C. Ebcr Feet.. 3-. 80 3.55. 3u50 3.50 1.02 58 43 1, 730 487 322 50 542 356 317 m> 11* 119 77 72 53 4S 20 3.0 .3 Note.-— 1^15: Measurements beginEmg Mar. 24 referred toaiew gage; beginning Jun.e 28 relerred t© tem- porary gage. 1916: Lower gage read .Tan. 3 to 15. Gage aliove ford read 5.15 feet .Tan. 12.. New g.ag.o- read Apir. 7 to. June 10; old gage read 4.35, Apr. 7; old gage read 4.32 Apr. 11. Measurements, on Jan. 17 and 18 were mad©-- bv floats; coefEcient of 0.80 used to reduce S:Urface velocities to m«an velQcities. ■l917: Upper gage read Jan. 9 and 26, Feb. 9-'and- 15,.am II m 13. 13 B 14 .. 13 13 la 13 13 15. 27 1# la 13 13 13 13 13; m ta 13 14 m SAINT GABRIEL RIVER BASIN. 379 Daily disckarge, in second-feet, oj San Gabriel River near Azusa, Calif .^jor 1894-1918 — Con. Oct. Nov. Aug. Sept. 10 14 39 15 14 3S 14 13 36 1-i 13 30 13 13 36 13 13 30 14 13 36 14 13 47 35 13 13 47 34 14 13 47 34 14 13 40 33 14 13 46 32 13 13 46 32 13 13 45 32 13 13 44 32 Day. iS94-95. 16 17 18 19 20 21 22 23 24 25 26 27. 28 29 30 31 Oct. Nov. Aug. 13 13 13 13 13 42 41 ■:o -10 39 39 i 38 33 39 39 40 40 lO Sept. 32 31 31 31 31 30 29 10.3 a 9. 8 8.8 2.3 I>ay. 1-^9: 21 22 23 21 25 26 27 28 29 30 a 24. 4 22.8 21.2 a 20 18. G a 12. 7 all. 4 a 10. 2 2.3 36 101 134 a 127. 2 a 1 20. 3 a 113. 4 O106.5 99.7 Apr. 21..^ 24.5 14 10.4 Day. a 15 21.2 21.2 a 18. 6 16 a 18. 6 21.2 a 22. 4 a 23. 7 a 2.5 6.3 5.0 3.1 a3.1 «3. 1 3.1 a3.1 a 3.1 a 3.1 a3. 1 "82 78 G68.5 07 59.4 x\pr. Note.— No flov/ Apr. 19 to Sept. 30. 380 SURFACE WATER OF PACIFIC SLOPE, SOUTHER!^ CALIFORNIA. Daily (Hsckarge, in second-feet, of San Gabriel River near Azusa, Calif., for 1894-1918— Con, Day. Dec. Jan. Feb. a 0.5 ! 1,710 a. 5 750 a. 2 275 «.2 243 «.l 5 142 0.2 5 155 0.3 130 0.4 119 .4 108 a. 3 6 99 a. 2 36 82 .0 73 «1.6 67 a3.3 59 "5 59 6.6 46 a 4. 5 59 2.3 46 1,600 C2.3 688 2.3 520 .5 345 .5 46 275 ".5 46 259 a. 5 243 .5 275 .5 292 .5 44 275 ".5 ; 275 fl.5 0.5 59 12 52 Apr. May. 1896-97, 1 2 3..... 4 5 6.. 7... 8........ 9 10 11 12 13 14 15 16 17 18 19 20 21..... 22 23 24 25.... 26 27 28....: 29...... 30.-..: 31 177 142 31.7 14 7.5 8.8 1.3 2.0 1.3 rU.7 2.0 0.3 ".3 0.3 «.3 a. 3 0.3 0,3 0.3 0.3 a.3 0.3 0.3 0.3 16 10 8.7 «7.5 275 275 ! 310 j 292 1 292 : 1,210 ' 1,765 965 625 470 445 420 382 345 345 345 470 .275 345 328 310 . 275 275 275 310 310 310 275 310 310 310 310 275 310 275 275 310 310 310 310 328 310 .328 345 345 345 300 292 292 275 243 243 214 185 170 Day. Feb. Mar. May. ' Day. May. 9 26 10 31 11 26 12 24 13 24 14 24 15 21 31 26 1898.b 16 17.... 18 19 20 21 22 23 24 25 26 27 28 29 30 31 21 31 19 31 17 11 17 11 Day. Day. 7-. 8.. fl.. 10.. a Estimated. ' River was dry on all other days during 1898. Note.— No fiow during year, except Jan. 11-15. SAK GABRIEL PJVER BASIK. 38 1 Daily discharge, in second-feet, of San Gabriel River near Azusa, Calif., for 1894-1918 — Con. Day. Oct . Jan. May. Day. Oct. Jan. May. Day. Oct. Jan. May. 1899-1900. 1. s 11 12 13 14 15 16 17 18 19 20 1899-1900. 9 1899-1900. 21 2 22 . . 3 49 . 19 23 4 13 24 5 3 25 6 . 26 7 27 8. 28 9 29 10. 30 31 Day. Jan. Feb. Mar. Apr. May. June. Day. Jan . Feb. Mar. Apr. May. June. 1901. 1 1,450 410 145 103 80 70 52 44 37 70 70 70 115 2,600 1,450 930 1,010 770 590 450 410 370 410 540 370 370 3.35 3.35 248 235 222 200 180 180 170 152 145 130 115 75 70 70 70 70 00 60 60 56 56 56 56 52 52 48 200 103 98 145 80 75 70 60 56 52 44 40 37 37 37 27 24 24 27 24 18 13 11 11 11 10 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1901. 3e 2. \i If li 18( 12i 7^ 6( 6C 6C 7( IOC 8( 7( 7C ) 540 645 645 645 708 ) 708 770 708 645 ) 540 450 ) 410 370 103 103 98 98 98 109 92 92 86 86 80 80 109 109 80 80 44 37 37 30 30 28 27 16 16 16 16 16 13 13 44 34 30 27 24 24 21 18 1» 24 103 60 44 44 37 30 30 2 3.. .. . 4 5 6 7. 8 9 10 11 12 •- 13. 14 15 1 Day. Oct. Feb. Mar. Ap. Day. Oct. Feb. Mar. Apr. 1901-2. ] 6 318 77 40 30 42 18 18 147 85 52 37 30 24 IS 13 37 13 12 11 10 18 18 16 13 12 10 10 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1901^2. 13 10 8 21 12 7 4 7 48 30 24 16 13 12 18 13 2 3 4 5 6 10 12 4 8 9 10 11 57 27 12 12 20 12 8 13 14 15 _ i _ 1 Note. — River dry on i 21-30, 1900. days for which discharge is not given. No recordof daily discharge Nov. 382 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of San Gabriel River 7iear Azusa, Calif, for 1894-1918— Con. ^ Day. Nov. Jan. Feb. Mar. Apr. May. June. 1902-3. 1. 134 125 65 78 54 50 45 50 34 30 34 34 41 34 34 24 18 13 10 7 1 10 350 310 273 310 273 211 164 144 125 107 92 78 54 37 30 24 18 13 12 144 594 292 164 164 164 273 1,348 6,844 1,917 1,398 945 868 652 472 417 370 286 250 286 220 205 220 323 1,156 590 590 652 590 590 590 528 472 472 444 323 288 286 286 268 268 250 250 250 250 220 190 190 164 164 139 139 139 139 118 98 98 98 98 98 98 108 83 83 83 68 55 55 55 55 2 50 3 .... 50 4 44 40 G 35 35 8 35 9. . . 35 10 35 11 18 27 12 21 13.. . 21 14 20 1-5 18 15 16 17 ... . 15 18 14 19 12 20 ... 10 21 10 22 10 23 . . . 6 24 4 25 4 2G 27 28 2,936 438 144 144 29 30 31 Day. Feb. Mar. Apr. May. i Day. Feb. Mar. Apr. May. 1904. 1 ... 24 13 72 IS 7 54 45 41 37 30 30 27 24 18 13 3 37 34 30 30 27 24 21 IS 15.5 13 10 4 1 ] 1 ] 190^ \. 1,068 164 92 65 54 54 92 7,8 65 50 54 37 30 27 24 18 37 34 30 30 30 2 3 8 -1 .... 9 . . 5 6 I 7 2 8......... ^ 9 4 10.. 5 11 6 • . 12 7 13 8 438 54 14 9 10 1 ! Note.— River dry on all days for which discharge is not giveu. ^ SAN GABRIEL EIVER BASIN. 383 Daily discharge, in secand-feet, o/SanGahriel River near Azrtsa, Calif,, for 1894-1918 — Con, Day. Jan. Feb. Mar. Apr. May. Jane. July. 1905. 1 130 13,0 130 130 185 165 76 76 70 70 76 11,058 6,533 2,030 1,040 3,145 1,640 1,160 1.040 762 687 616 616 616 616 616 550 492 492 441 394 394 372 372 351 351 331 331 311 311 292 292 273 273 265 237 237 237 220 202 202 202 202 170 170 170 170 140 140 140 126 HO 351 237 202 170 170 170 493 311 273 237 237 202 202 202 202 202 202 202 170 170 170 170 155 140 140 140 140 140 126 113 102 102 102 90 90 90 80 80 80 71 71 71 71 71 63 55 55 55 48 42 42 42 42 42 37 37 37 32 28 28 24 2 231 2,940 1,68.S 870 351 259 207 165 147 115 101 88 88 351 560 560 390 351 289 259 207 185 165 147 147 147 147 21 3 21 4 ... 21 5 16 6 16 7 14 8 . . . 12 9 . 12 10 12 11 37 12 12 13 . 12 14 10 15 . : 10 16 8.5 17 7 18 4.5 19 . 2.5 20 21 22 41 23 24 25 26 . . . • . . . 27 28 29 30 31 Day. Jan. ■ Feb. Mar. Apr. May. Jime. July. Aug. Sept. 1906. 1 1,030 940 940 770 940 700 585 585 585 585 5S5 535 485 485 485 435 390 390 390 390 350 310 310 310 310 275 275 350 275 245 245 245 245 245 260 245 245 245 245 245 245 218 218 218 218 218 218 195 195 195 195 195 195 175 175 245 218 1,030 535 370 350 310 310 275 275 245 245 245 218 218 195 195 195 175 175 175 165 155 155 155 155 145 145 135 135 135 135 145 145 135 126 116 116 116 107 107 98 107 98 98 98 81 81 81 81 81 81 73 73 73 73 73 65 65 ■ 50 50 44 44 37 31 25 21 17 12 8 8 6 5 4 4 3 2 2 2 2 1 1 2 3 4 " 52 67 5. C . 8 9 10 4 11... 12 7,950 6,240 1,020 1,200 1,590 2, 190 1,590 1,590 1,320 970 770 770 2,110 7,080 9,350 6,080 4, 250 4,140 1,340 1,340 13. 67 67 67 07 52 13 10 10 7 23 10 7 7 5 J4 15. IG 17 18 19 430 102 67 23 10 4 2 20 21 22 23.. 24 25 26 27 28 29 30 31 Note.— P.iver dry en all days for which discharge is not given. 384 SUKFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in sccond-ject, ofSanGahriel River near Azusa, CaliJ.Jor 1894-1918 — Con. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1907. 1 i 225 190 130 130 12 225 380 1,400 1,760 4,595 2,060 1,760 1,400 820 890 820 820 890 820 710 610 560 560 510 610 060 610 610 710 820 760 660 660 890 890 960 960 820 760 710 710 660 660 610 610 610 610 1,110 1,110 890 660 660 1,110 890 710 710 660 660 660 174 174 202 690 401 309 202 174 174 270 202 202 174 174 126 126 126 126 126 126 126 126 126 105 105 105 105 105 149 600 610 610 610 6,730 4,200 3,000 2,800 2,800 2,800 2,600 1,630 1,510 1,350 1,200 925 820 760 710 760 2,140 1,630 1,070 1,510 1,760 2,500 1,740 1,740 1,740 1,740 1,560 149 126 126 105 105 105 105 87 87 71 56 56 87 87 87 174 202 202 202 202 202 174 126 126 174 174 149 126 126 126 126 1,470 1,470 1,470 1,380 1,290 1,210 1,130 1,130 1,050 1,050 1,050 1,050 1,050 1,050 1,050 890 890 810 730 655 655 585 585 585 585 515 415 460 460 460 126 126 149 126 105 105 87 , 71 71 56 56 71 71 71 87 87 71 71 71 56 56 56 71 71 71 56 71 71 71 71 415 374 374 336 336 336 302 302 302 270 270 270 255 255- 255 255 255 255 240 240 240 240 240 240 240 240 240 226 226 226 226 71 87 87 71 71 71 71 56 56 105 56 56 56 56 43 43 43 32 32 32 32 10 10 10 10 10 10 6 6 6 10 212 212 212 212 212 212 212 212 199 199 199 199 186 186 188 186 ' 174 174 174 163 163 153 153 143 143 143 134 134 125 125 6 4 4 4 4 4 4 , 4 2 2 51 77 108 125 108 108 108 108 92 77 ■ 77 ■ 77 63 51 51 51 51 41 41 41 41 32 32 32 32 32 32 32 32 32 32 32 32 24 24 24 24 24 17 17 17 17 17 11 'I 6 6 6 6 6 3 3 3 3 3 3 3 3 3 3 6 23 6 3 2 1 3 3 4 3 5 1 6 1 7 1 8 9 10 . *■ 11 12 13 14 15 16 .... 17 18 19 20 21 22 23 24 25 - - 26 27 28 29 30 3J . 1907-8. 1 3 1 2 3 4 5 6 7 8 9 .. 10 . 11 12 , 13 14 15 6 2 16 . 3 6 3 1 1 17 18 - 19 . 20 21 22 23 24 1 3 1 11 24 17 6 3 765 1,165 560 309 234 270 202 174 25 26 27 28 29 30 31 56 Note,— River dry on all days for -which discharge is not given. SAN GABRIEL EIVEE BASIN. 385 Daily discharge, in secomi-feet, of San Gabriel River near Azusa, Calif., for 1894-1918 — Con. Day. : Oct. Nov. Dec. Jau. Feb. Mar. Apr. May. June. July. Aug. Sept. 1909. i 1 ■ ! ' 242 242 242 242 242 242 7,030 3,120 1,015 710 1,140 2,090 2,690 1,910 1,140 905 710 620 538 462 393 333 333 283 283 283 283 283 253 200 200 200 200 153 153 153 153 153 153 119 119 119 119 119 119 119 119 119 96 96 96 96 96 96 78 78 242 242 242 242 242 242 242 242 242 242 205 205 205 205 205 205 172 172 172 142 1,430 710 462 393 333 538 710 620 620 538 538 78 78 78 78 78 78 78 78 78 78 78 63 63 63 63 63 63 78 63 63 63 176 96 96 78 78 78 119 119 119 119 538 620 620 710 620 538 538 462 462 462 393 393 393 333 333 393 393 333 333 333 333 333 333 333 283 283 283 283 283 242 96 96 96 96 78 78 78 78 78 78 78 78 78 63 63 63 63 63 63 63 50 50 50 50 50 50 50 50 39 30 242 242 242 242 242 205 205 205 205 205 205 205 226 225 216 215 213 210 206 242 242 242 224 216 208 200 193 186 178 170 162 30 30 30 30 30 22 22 22 16 16 16 7 7 7 7 4.5 4.5 4.5 4.5 4.5 4.5 4.5 2.5 2.5 2.5 2.5 2.5 2.5 1 1 .5 114 112 108 106 104 102 100 97 95 92 90 87 85 83 80 78 75 73 71 68 65 63 61 59 56 54 52 50 48 45 S 38 36 34 32 30 27 25 23 21 19 17 15 13 11 9 7 5 3 2 2 1.5 1.5 1.0 1.0 .5 .5 .0 .0 2 1 3 i . 4 ! 1 5 ! 6 - ' 7 ' 8 i : 9 ! 10 . . 11 ! I2 !*;■■■" 13 ' 2 23 23 10 4 2 2 2 2,690 4,050 1,580 538 393 283 393 333 283 242 242 12,400 3,090 1,850 1,440 1,070 1,070 1,070 733 733 634 634 634 541 541 541 541 455 455 455 455 455 379 379 379 312 312 312 312 253 253 200 14 15 16 17 18 . 19 20 21 22 ... 23 24 25 i 26 .. . 27 28 29 30 31 1909-10. 1 2 i . 1 . .! 3 . ! ! . ! . 4 i i •■ 5 : . ' . 1 . - 6 ' . 1 7 i 8 i. 9 1 1,430 462 142 93 44 44 33 33 24 2i 24 24 74 44 58 44 33 33 33 24 24 24 5,610 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 10 28 29. 30 31 Note.— River dry on all days for which discharge is not given. 142131°— 21— wsp 447 25 386 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of San Gabriel River near Azusa, Calif , for 1894-1 9 18— Con, Day. Apr. May, July. Sept. 1911. 1 2 3 . . 4 5 6 7 8 ... 9 100 10 1,070 11 200 12 50 1.3 . 16 14 2 15 1,440 455 16 17 153 18 . . . . 78 19 50 20 39 21 30 22 22 23 16 24 11 25 1,070 541 26 27 312 28 253 29 5,190 1,680 4,150 30 31 1,540 900 1,140 3,180 2,140 1,400 1,020 785 900 500 420 350 290 235 235 185 185 140 140 140 235 235 235 235 585 2,470 1,830 1,540 1,540 3,560 7,660 9,100 4,500 3,430 2,300 2,060 1,780 1,570 1,520 1,470 1,270 1,200 1,020 963 840 850 730 740 640 650 560 570 580 680 690 590 500 510 520 430 440 370 375 325 350 375 325 350 345 345 340 340 335 335 330 250 248 246 245 243 241 234 232 231 229 227 175 217 217 217 168 280 168 168 128 128 128 128 128 128 128 128 Note.— Daily discharge for 1910-11 determined from fairly well defined rating curves applicable as fol- lows: Jan. 1 , 1910, to Jan. 29, 1911; Jan. 30 to Mar. 10, 1911, and May 16 to Dec. 31, 1911; Mar. 11 to May 15, 1911, determined by the indirect method for shifting control. Discharge estimated Sept. 29, 1911, Jan. 14, 1912, and Mar. 4, 1912. Mar. 5 to Apr. 20, 1912, determined by the indirect method for shifting control. Apr. 21 to June 13, 1912, fairly well defined. No flow Oct. 1 to Jan. 8 and Aug. 1 to Sept. 28. Day. Oct. Jan. Mar. Apr. May. June. Day. Oct. Jan. Mar. Apr. May. June. 1911-12. 1 7 45 45 45 45 45 45 40 40 170 170 650 415 245 320 320 217 217 168 168 128 128 128 217 168 128 128 128 128 98 98 41 41 28 28 28 28 19 19 19 12 12 12 3 1911-12. 16 320 2G0 205 205 165 98 95 70 70 70 65 65 65 65 60 45 320 320 315 310 440 355 355 355 355 355 355 280 280 217 217 98 76 76 76 76 76 57 57 57 57 57 41 41 41 41 41 2 . ... 17 3 18 4 19 5 . . . 290 1,170 310 90 50 2,950 750 360 660 380 390 20. . . 6 21 7 . 22 8 23 9 24 .* 10 25. . 11 26 12 . . .. 27 13 28 14 29 15...._ 30 31 Note.— Daily discharge determined from fairly well defined rating curves applicable as follows: May 16 to Dec. 31, 1911; Apr. 21 to June 13, 1912. River dry on days for which no discharge is given. Mar. 5 to Apr. 20, 1912, determined by the indirect method for shifting control. SAN GABRIEL RIVER BASIN. 387 Daily discharge, in second-feet, of San Gabriel River near Azusa, Calif, for 1894-1918 — Con. Day. Jan. Feb. Mar. Apr. May. Day. Jan. Feb. Mar. Apr. May. 1913. 1 175 130 130 130 130 130 130 130 130 112 130 95 95 82 70 82 82 70 62 62 53 53 53 46 40 40 40 40 40 40 26 23 18 18 18 18 18 18 18 18 14 10 10 6 3 1913. 16 17 18 19 20 21 80 55 35 25 3 70 70 70 70 62 62 62 53 53 53 40 35 30 30 152 95 35 30 40 30 30 30 30 30 30 30 32 35 35 30 30 2 3 4 5 6 . . 7 22 g 210 75 54 25 14 8 23... . 9 24 1,210 1,880 750 425 230 10 25 11 26 12 27 13 28 14 29 15 30. 31 Note. — Daily discharge for period Feb. 24 to May 15, 1913, determined from a fairly well defined rating curve. Discharge Jan. 16 to 21 and Feb. 8 to 14 estimated from discharge measurements and record for San Gabriel River at headworks near Azusa. No flow on days for which discharge is not given. Day. Nov. Jan. Feb. Mar. Apr. May. June. July. 1913-14. 1 685 685 625 625 625 598 598 545 390 285 270 240 240 240 225 215 255 1,720 4,490 11, 800 8,480 6,620 4,710 4,180 2,950 2,840 2,500 2,200 2,100 1,910 1,730 1,560 1,480 1,480 1,400 1,250 840 730 620 620 520 472 425 425 425 472 425 425 425 425 425 382 382 382 382 340 340 425 382 340 340 302 302 340 302 302 302 302 302 302 302 302 294 293 292 291 290 289 287 286 285 284 283 282 281 280 279 278 277 269 261 253 245 237 229 221 219 216 213 210 208 205 202 200 197 194 190 186 182 178 174 170 166 163 159 155 151 147 143 139 135 132 129 125 121 117 113 109 105 101 98 83 70 70 70 64 64 64 64 64 64 58 58 58 52 52 52 52 52 37 34 2 30 3 ... 27 4 24 5 21 6 21 7 21 8 15 9 12 10.. . . . . . . 12 11 10 12.. 10 13 10 14 10 15 230 850 300 5,050 1,640 750 470 425 380 380 3,160 9,150 2,460 1,880 985 820 820 10 16 8 17 8 g 18 19 40 4 20 6 21 6 5 22 23 24 3 25 2 2 26 27.. . 2 2 1 28 29 30 31 1 Note.— Channel dry Oct. 1 to Nov. 18, Nov. 21 to Jan. 14, and Aug. 1 to Sept. 30; discharge Jan. 26 esti- mated. Discharge Apr. 14 to June 10 determined by indirect method for shifting control; discharge July 1-4 interpolated. 388 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, ofSanGabriel River near Aziisa, Calif., for 1894-1918— Con. Day. Dec. Jan. Feb. Mar. Apr. May. June. July. 1914-15. 1 j 65 i 400 230 230 250 250 250 230 230 212 212 212 194 194 212 212 194 178 178 178 178 178 194 178 178 178 162 162 162 194 230 230 270 270 270 270 270 270 270 270 270 270 270 270 270 270 250 250 270 250 230 230 230 212 212 212 212 212 212 194 194 194 178 178 162 147 132 119 106 106 106 94 94 82 82 72 72 72 54 48 48 48 48 48 48 42 40 37 37 32 22 18 18 18 2 1,000 510 275 150 120 90 65 1,000 1,110 1,000 900 730 580 510 450 450 425 378 450 378 335 295 400 378 355 315 275 355 315 275 275 275 258 240 240 240 225 210 256 256 256 256 274 274 256 256 259 262 262 262 262 262 262 290 270 250 250 54 3 32 4 27 5 . 27 6 22 7 18 8 14 9 11 10 ..., 8 11 5 12 5 13 5 14 5 15 5 16 . - 3 17 50 25 20 15 25 15 23 15 15 10 4 2 ■"mso" 240 120 3 18 3 19 3 20 - 3 21 3 22 3 23 3 24 3 25 1.5 26 1.5 27 28 29 . . 30 31 Note. — Discharge determined from rating curves as follows: Jan. 29 to Mar. 12, fairly -well defined above 200 second-feet; Mar. 28 to June 15, well defined; and June 16 to July 26, well defined. Discharge Dec. 17-28, estimated from current meter measurements and observer's notes; Mar. 13-27, estimated from measurements. No flow Oct. 1 to Dec. 16, Dec. 29 to Jan. 28, and July 27 to Sept. 30. Day. Jan. Feb. Mar. Apr. May. Jinie. Day. Jan. Feb. Mar. Apr. May. .Tunc. 1910. 1916. 1 1, 220 525 384 172 44 16 99 495 412 246 63 4.4 2 19 1,020 495 374 165 42 17 17,100 495 3S.5 246 63 4.1 3 79 930 495 365 169 28 18 22,300 468 385 240 63 3.2 4 37 845 495 356 160 16 19 3,900 440 385 234 74 2.6 5 99 765 620 346 96 14 20 2,380 440 765 222 69 .8 6 62 690 555 331 96 11 21 1,570 440 655 216 63 .6 7 37 690 555 299 93 10 22 1,330 412 ooo 214 57 .6 8 22 655 525 285 89 9.0 23 ],170 385 555 211 .54 .6 9 400 620 495 285 86 7.5 24 ■ ■ 848 360 525 202 57 .4 10 740 588 495 278 82 7.5 25 760 335 495 200 57 .0 11 400 555 495 285 79 7.0 26 620 495 290 151 53 .0 12 110 555 46S 278 109 7.0 27 7,860 930 440 130 52 .0 13........ 79 555 468 272 107 6.0 2S 4,240 555 440 126 49 .0 14 55 555 440 259 72 5.5 29 2,160 555 412 122 45 .0 15. 135 495 440 252 66 5.0 30 31 2,000 1,710 402 3» 174 44 44 .0 .0 Note.— No fiow Oct. 1 to Jan. 1, and June 25 to Sept. 30. SAN GABRIEL RIVER BASIN. 3^9 Daily discharge, in second-feet, of San Gabriel River near Azusa, Calif , for 1894-1918— Con. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. 1916-17. 1 17 17 48 37 32 28 26 27 26 27 26 28 29 43 50 11 145 215 190 140 120 100 80 67 62 57 55 52 49 .8 45 43 40 41 41 40 39 38 37 34 31 29 26 25 20 19 58 63 73 77 182 590 355 270 730 490 380 332 290 252 218 200 176 165 147 135 165 165 135 115 115 110 110 104 100 100 100 100 100 96 94 92 90 90 90 90 100 110 110 87 77 71 66 63 66 58 53 63 48 44 43 41 39 104 107 63 48 39 36 36 37 39 41 44 50 53 50 48 43 41 2 320 80 30 25 55 50 35 25 35 40 30 30 25 15 10 10 8 6 3 3 2 2 1 1 1 39 3 37 4 37 5 31 6 - - 30 7 30 8 31 9 31 10 31 11 30 12 27 13 24 14 24 15 22 16 20 17 19 18 35 19 31 20 24 21 20 22 18 23 19 24 . 3,900 310 165 90 56 42 24 20 22 25 20 26 17 27 28 4 29 30 31 Day. Feb. Mar. Apr. May. June. Day ' Feb. 1 Mar. Apr. May. June. 1918. 1 100 64 52 44 42 184 4,120 2,030 870 1,810 4,940 4,100 3, 520 1,950 1.250 410 388 367 348 328 310 310 292 292 292 276 259 259 229 175 76 72 70 69 75 75 66 58 55 53 51 49 47 44 43 0.7 '.& .4 .2 1:1 1 .9 ! .4 191S. 16 1,050 S50 720 790 690 630 500 .=>30 505 480 455 432 410 388 348 348 164 142 132 124 124 115 115 115 114 112 112 103 99 89 78 42 36 20 18 15 13 11 4.2 2.4 2.4 2.1 1.6 2.8 4.9 3.7 1.0 2 17 3 l.S . . 19 5 .. .. 20 6 21 200 1,5.S0 400 184 241 292 207 148 22 ... R 23 9 24 10 25 n . . 26 12 27 13 2S 29 14 15 30 31 ;1 Note. — River dry on all days for which discharge is not given. 390 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Monthly discharge of San Gabriel River near Azusa, Calif., for 1896-1918. Discharge in second- feet. Run-off (total in acre- Maxi- Mini- Mean feet.) mum. mum. 25 0.0 10.6 652 27.5 3.1 11.7 673 134 2.3 74.6 4,590 46 .0 11.1 660 6,580 177 .0 12 738 16 .0 3 179 12 .0 2 123 130 5 40 2,484 1,710 46 329 18, 272 1,765 275 434 26,686 345 141 259 15,417 141 28 82 5,042 28 .2 5 274 1,765 1,600 .0 69,200 .0 72 4,458 15 .4 8 475 5 3.0 4 221 31 14 863 41 11 622 1 .03 2 1,600 .0 9.46 6,920 16 1.2 123 16 .1 123 13 .42 26 49 2 123 38 2 123 49 .37 272 5,168 172 10,235 1,450 111 6,825 2,600 70 630 34, 988 370 80 158 9,715 75 13 43 2,559 200 18 55 3,382 27 417 5,168 68, 100 70 3 184 57 3 167 318 4 38 2,337 37 7 417 318 4.25 3,100 18 .0 .60 35.7 2,936 .0 118 7,260 134 .0 32.7 1,820 1,348 .0 186 11,400 5,844 205 741 44, 100 286 55 148 9,100 55 .0 20.7 1,230 5,844 .0 104 74,900 438 .0 17.0 978 1,068 .0 60.2 3,700 Discharge in second- feet. Maxi- Mini- mum, mum. Run-off (total in acre- feet). January February March April The period. 1896-97. October November December January February March April May Jxme The year. .. 1897-98. October November December January February March The year. .. January The year . 1899-1900. October January May...' The year . . . 1900-1901. November... January February March April May June The year. 1901-2. October February March April The year 1902-3. November January February March April May June The year... 1903-4. February March April . . May... The year. 1904-5. January February March April May June July The year. 1905-6. January February — March April May Jmie July August The year . 1906-7. January February March . .". April May June July Aue:ust September..., The year 1907-8. October November January February March April May , June July Augxist The year . 1908-9. January February March ... April May June July The year. 1909-10. November December January February March April May The year. 41 2,940 11,058 394 492 102 37 11,058 430 67 9,350 1,030 1,030 310 116 17 350 4,595 1,110 6,730 1,470 415 212 125 24 3 1,165 690 202 149 105 4,050 7,030 1,430 710 242 114 43 7,030 10 5,610 12,400 253 176 0.0 .0 1,450 596 6,720 70 126 113 1.32 398 1,150 249 199 61.9 8.79 172 245 175 126 21 20.6 14.9 2,030 188 75, 2.48 610 610 415 226 125 32 3 873 772 1,810 906 274 178 60.2 11.7 293,000 105 56 2.58 .13 119 184 131 80.0 42.4 1.27 1.81 .74 46.4 242 142 242 162 45 358 1,000 361 406 214 79.1 14.8 197 200 78 63 30 .33 270 ,060 135 83.3 66.5 11.0 137 81.2 22, 100 70, 700 14,800 12, 200 3,680 540 124,000 1,270 828 125,000 30, 200 10,400 11,200 4,650 152 190,000 53,700 42, 900 111,000 53,900 16,800 10,600 3,700 719 35.7 159 7.7 7,320 10,600 8,060 4,760 2,610 75.6 111 45.5 33, 700 22,000 55,500 22,200 24,200 13, 200 4,710 910 143,000 19.6 16,600 65,200 7,500 5,120 3,960 676 99,100 SAIT GABKIEL RIVER BASIN. 391 Monthly discharge of San Gabriel River near Azusa, Calif., for 1896-1918 — Continued. Month. Discharge in second- feet. Run-off (total in acre- feet). Month. Discharge in second- feet. Run-off (totalin Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1910-11. January February 5,190 3, 180 9,100 690 360 128 28 50 140 235 248 128 28 1 546 724 1,910 401 201 55. 1 14.4 2.6 33, 600 40, 200 117,000 23.900 12:400 3,280 885 155 1914-15. December January February March 50 1,350 1,110 400 250 270 178 54 65 210 162 178 18 7.1 55.2 464 267 202 243 73.7 9.23 437 3,390 25,800 16,400 May Apri! 12. 000 May 14,900 4,390 JuV^ September July 568 The year. . . 1915-16. January February March The year. . . 9,100 321 231,000 1,3.50 108 77, 900 1911-12. October 7 2,950 650 217 41 40 41 .2 301 249 104 9.7 12 18, 500 14, 800 6,400 577 22,300 1,220 765 384 172 44 335 290 122 44 .0 2,330 605 488 253 82.2 7.89 143,000 34,800 29,900 April Mav April 15 100 May 5,050 489 •The year. . . 2,950 55.5 40,300 The year. . . 1916-17. October. . .. 22,300 .0 315 228,000 80 1,880 175 82 26 30 30 6.4 174 90.5 42.7 7.6 394 9,660 5,560 2, .^40 467 1912-13. January . 320 3,900 215 730 290 107 41 17 19 90 36 27.2 149 62.7 148 131 55.2 23.5 1,670 9,160 February March December January February March April May 8,220 8,050 1,880 25. S 18, 600 April 3 280 May 1,440 1913-14. November January Fobruarv March " 40 9,150 11,800 2,100 340 269 135 34 215 340 277 139 37 1 1.5 960 2,140 761 296 196 81.1 10.6 89 .59,000 119, 000 46,800 17,600 12. 100 4;,,170 781 360 275 161 90.6 59.1 45.8 .067 .173 .159 4.50 9.78 3.52 1.62 1.24 .725 .408 .266 .206 40 38 49 57 145 290 252 268 138 90 52 45.0 41.0 69.7 120 544 350 290 332 192 114 64.8 54.9 .203 .185 .114 .541 2.45 1.58 1.31 1.50 .865 .514 .292 .247 42 48 63 415 370 212 134 90 61 45.0 50.6 58.2 !,410 685 566 335 169 98.0 77.5 58.0 47.2 .203 .228 .262 10.90 3.09 2.55 1.51 .761 .441 .349 .261 .213 384 0.27 .24 .24 .23 .19 1.92 1.52 .92 .42 .26 .17 .13 6.51 .15 .15 .15 .25 1.11 .86 .60 .42 .24 .14 .19 .18 5.19 10.18 4.06 1.81 1.43 .81 .47 .31 .23 24.94 .13 .62 2.55 1.82 1.46 1.73 .97 .23 .25 .30 12.57 3.33 2.94 1.68 .40 .30 .24 142131°— 21^ wsp 447- -26 402 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. i Combined monthly discharge of San Gabriel River and canals near Azusa, Calif., for 1894-1918— Contmued. Discharge in second-feet. Depth in inches on drainage Total in acre-feet. 1916-17, October November December January February March April May June July August September The year 1917-18. October November December January February March April May June July August September The year 62 107 109 180 161 116 63 42 27 23 221 176 140 88.6 51.0 35.7 25.4 0.514 .313 1.07 .995 .793 .631 .399 .230 .161 .114 0.59 .35 1.15 .78 1.11 1.15 .88 .73 .45 .27 .19 .13 3,990 32 40 34 38 1,670 5,030 410 203 129 83 53 56 22 24 32 30 31 132 203 129 81 50 25.3 31.0 32.5 32.9 168 1,190 286 163 101 64.5 46.2 39.2 .114 .140 .146 .148 .757 5.36 1.29 .734 .455 .291 .208 .177 .13 .16 .17 .17 .79 6.18 1.44 .85 .51 .34 .24 .20 5,030 183 .824 7,010 4,130 13, 600 9,280 13, 200 13,600 10, 500 8,610 5,270 3,140 2,200 1,510 92, 000 1,560 1,840 2,000 2,020 9,330 73,200 17,000 10,000 6,010 3,970 2,840 2,330 Note.— Seepages 417-419 for monthly and yearly discharge of Southern CaUfornia Edison Co.'s canal near Azusa. There is no separate table of tunnel diversion, when discharge is reported, except for years 1917-8. FISH FORK OF SAN GABRIEL RIVER NEAR AZUSA, CALIF. Location. — ^About 300 feet above junction with San Gabriel River in NE. I sec. 32, T. 3 N., R. 8 W., in the Angeles National Forest, and about 15J miles north- east of Azusa. Records available. — 1900, 1901, 1910, and 1912 (low-water record only). Elevation. — About 3,300 feet above sea level. Drainage area. — 10 square miles. Discharge. — Computed from gage-height record, giving head on weir. Cooperation. — Record furnished by Pacific Light & Power Corporation, through G. 0. Newman, engineer. SAI^ GABRIEL RIVER BASIN. 403 Low-water record of daily discharge, in second-feet, of Fish Fork of San Gabriel River near Azusa, Calif., for 1900, 1901, 1910, and 1912. Day. 1900 1901 1910 1912 July. Aug. Sept. Oct. Aug. Sept. July. Aug. Sept. July. Aug. Sept. 1 1.4 1.7 1.7 1.7 1.3 1.2 1.2 1.2 1.1 1.0 .95 1.0 1.0 1.0 1.0 1.2 .95 1.0 1.0 1.0 1.1 1.1 1.1 1.1 1.0 .9 .9 .9 .9 .85 0.95 .90 .95 .96 .93 .93 .93 .93 .90 .89 .95 .95 1.01 4.0 3.9 3.8 3.7 3.6 3.6 3.6 3.5 3.5 3.4 3.5 3.4 3.3 3.3 3.2 3.2 3.1 3.1 3.1 3.1 3.1 ""3."6' 3.0 2.9 2.8 2.8 2.8 2.7 2.8 2.8 2.8 2.9 2.9 2.7 2.7 2.7 2.7 2.6 2.6 2.7 2.5 2.6 2.7 2.9 2.8 2.7 2.6 2.5 2.5 2.4 2.4 2.4 2.4 2.4 2.4 2.3 2.3 2.3 2.4 6.8 2.7 2 4.9 4.7 4.7 4.5 4.4 4.1 3.9 3.8 3.4 3.3 3.8 3.6 3.7 3.4 3.4 4.0 3.6 3.4 3.3 3.2 3.2 2.9 2.7 3.0 2.8 2.8 3 1.0 .95 1.0 1.1 1.1 .9 .95 1.0 1.0 1.1 1.1 1.0 1.0 .9 .9 .85 .85 .95 .9 .9 .9 .9 .9 .9 .9 .9 1.0 .95 1.1 "i.'s"' .9 .95 1.1 1.1 1.1 1.1 .9 .9 .9 .85 .85 .85 .8 1.0 1.0 1.0 1.0 .8 .8 .8 .85 2.3 2.2 2.2 2.2 2.2 2.0 2.1 2.1 2.1 2.1 1.9 1.9 1.9 2.0 2.0 2.1 2.0 2.0 2.1 2.1 2.4 2.3 2.2 2.1 2.1 2.0 2.1 2.3 4.4 '"i'.o 5.1 5.0 5.0 5.2 5.1 5.1 5.1 5.1 4.8 6.2 5.3 4.9 4.6 4.6 4.6 4.5 4.5 4.5 4.2 4.3 4.1 4 5 6 2.7 7 4.1 8 9 . 10 2.6 11 '"5.9 3.6 12 13 14 15 16 17 3.7 2.6 18. 19 6.0 20 21.. 3.2 22:::::::::::::: 2.3 23 5.1 24 25 26 2.9 2.2 27 28 29 2.7 2.6 2.8 30 4.3 31 IRON FORK OF SAN GABRIEL RIVER NEAR AZUSA, CALIF. Location. — About 300 feet above junction with San Gabriel River, in the Angeles National Forest, in SE. 1 SW. i sec. 32, T. 3 N., R. 8 W., and about 14^ miles northeast of Azusa. Records available. — 1900, 1901, 1910, and 1912 (low-water record only). Elevation. — ^About 3,000 feet above sea level. Drainage area. — 13.7 square miles. Discharge. — Computed from gage-height record, giving head on weir. Cooperation. — Record furnished by Pacific Light & Power Corporation, through G. 0. Newman, engineer. 404 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Low-water record of daily discharge, in second-feet, of Iron Fork of San Gabriel River near Azusa, Calif , for 1900, 1901, 1910, and 1912. Day. 1900 1901 1910 1912 July. Aug. Sept. Oct. Aug. Sept. Ju]y. Aug. Sept. July. Aug. Sept. 1 2.0 2.0 2.1 2.1 1.9 1.9 1.8 1.7 1.6 1.6 1.5 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.3 1.3 1.4 1.2 1.3 1.2 1.3 1.2 1.1 1.1 1.2 1.0 1.1 1.0 1.1 1.2 1.1 1.1 1.2 1.1 1.1 1.2 1.2 1.2 1.3 5.0 4.9 4.8 4.7 4.6 4.6 4.5 4.5 4.5 4.4 4.5 4.5 4.6 4.5 4.4 4.4 4.3 4.3 4.3 4.3 4.3 4.2 4.0 4.0 3.9 4.0 4.0 4.0 3.9 3.8 3.8 3.8 3.9 4.0 4.0 3.6 3.6 3.5 3.4 3.4 3.4 3.4 3.5 3.6 3.6 3.7 3.6 3.6 3.4 3.4 3.4 3.3 3.3 3.3 3.3 3.3 3.2 3.2 3.2 3.2 3.3 6.3 4.2 2 1.1 1.1 1.1 1.2 1.2 5.1 5.4 5.^ 5.8 5.4 4.9 4.8 4.8 4.9 4.6 4.5 4.1 4.2 4.2 4.4 4.6 4.7 4.4 4.2 4.2 4.2 4.2 3.9 3.8 3.7 3.9 3.4 3.8 3.8 3.8 4.5 3.3 3.2 3.2 3.0 3.2 3.3 3.3 3.3 3.3 3.3 3.2 3.2 3.1 3.1 3.0 3.0 3.0 3.1 3.2 3.3 3.9 3.9 3.7 3.2 3.2 3.1 3.1 3.2 4.6 4.9 5.8 5.7 5.7 5.7 5.7 5.6 5.5 5.5 5.5 5.6 5.4 5.4 5.4 5.3 5.3 5.3 3 4 5 6 4.3 7 5.6 8 1.2 1.1 1.2 1.2 1.1 1.1 1.2 1.2 \.\ 1.1 1.1 1.2 1.1 1.1 1.0 1.0 .95 .95 .95 1.0 1.1 1.1 1.1 "i.'i" 1.1 1.1 1.1 1.1 1.1 1.2 1.1 1.2 1.1 1.1 1.0 .9 .85 1.1 1.3 1.2 1.2 1.0 1.0 1.0 1.2 9 . . 10 4.2 11 ■■"7."3' 5.4 12 13 14 15 16 3.7 17 5.2 18 19 7.3 20 . 21 4.8 22 3.5 23 21 25 6.7 4.6 26 3.4 27 28 29. 30 6.8 31 ! COLDWATER CREEK ABOVE MOUTH, CAUF. Daily discharge, in secondfeet, over iveir on Coldwater Creeh, Calif., 2\ miles from mouthy for 1900. Day. July. Aug. Sept. 1 Oct. Day. July. Aug. Sept. Oct. 1 0.43 0.52 .58 .62 .57 .55 .56 .51 .51 .56 .50 .55 .52 "'o.m .62 .61 .63 .61 .58 .58 .58 .55 .60 .60 .64 21... 0.56 .51 .49 .45 .44 .45 .42 .42 .41 .40 .56 2 22 3 .49 .46 .54 .53 .50 .50 .53 .56 .53 .51 .46 .47 .45 .45 .47 .47 .52 ..55 23 4 24 5 25 6 26 7 27 .37 .49 .50 .47 .46 8 28 .... 9 29 10 30 31 11 Mean 12 .46 .48 0.55 0.60 13 14 15 16 17 18 19 20 SAN GABRIEL RIVER BASIIST. 405 WEST FORK OF SAN GABBIEL RIVER ABOVE NORTH FORE, CALIF. Daily discharge, in second-feet, over tveir on West Fork of San Gabriel River, Calif, above North Fori, for 1900. Day. July. Aug. Sept. Oct. Day. July. Aug. Sept. Oct. 1 0.55 .62 .68 .62 .53 .55 .55 .55 .44 .34 .29 .26 .24 .20 .13 .12 .16 .16 .12 .12 0.05 .02 "".'os' .07 .08 .08 .12 .10 .12 .10 .12 0.12 .12 .12 .12 .08 .ll" .16 .12 .12 .16 .16 .12 .12 .16 .16 .16 .16 .11 .12 .12 0.16 .16 .16 .16 .15 .20 .20 .16 .16 .13 .20 .20 .20 21 0.07 .12 0.12 .10 .07 .08 .08 0.16 .16 2 22 3 23 4 24 5 25 .08 .12 .20 .16 .16 .13 .14 6 26 7 27 .08 .08 .10 .12 .10 8 28 .05 .08 .05 .05 9 29 10 30 31 Mean 12 .29 .09 .14 0.17 13 14 15 16 17 18 19 20 WEST AND NORTH BRAN CHES OF NORTH FORK OF SAN GABRIEL RIVER AT WEIR, CALIF. The following tables are prepared from measurements made three times daily for the San Gabriel Electric Co. and filed in a suit before the United States land office at Los Angeles, Calif. The mean of the three daily measurements is here given. Daily discharge, in second-feet, over weir on the west branch of North Fork of San Gabriel River, Calif , for 1900. Day. July. Aug. Sept. Oct. Day. July. Aug. Sept. Oct. 1 0.23 .23 .23 .26 .17 .23 .23 .22 .12 .12 .19 .19 .19 .19 .15 .26 .23 .23 .23 .22 0.19 .19 .17 .22 .12 .12 .22 .18 .20 .22 .22 .22 .22 .18 .18 .12 .12 .25 .15 .12 0.20 .12 .18 .18 .23 .23 .19 .19 .19 .19 .19 .19 .22 21 0.39 .24 .26 .26 .28 .37 .37 .26 .23 .23 .23 0.22 .22 .22 .22 .22 .23 .18 .18 .25 .20 0.15 .12 .15 .22 .27 .26 .26 .22 .20 .17 2.... 0.28 .27 .27 .26 .28 .24 .23 .25 .23 .25 .25 .22 .27 .27 .31 .31 .27 ,31 .39 22 3 23 4 24 5 25 6 26 7 27 8 28.. . . 9 29 10 30 31 11 Mean 12 .28 .21 -19 0.19 13 14 15. . . 16 17 18 19 20 406 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, over weir on the north branch of North Fork of San Gabriel River, Calif, for 1900. Day. July. Aug. Sept. Oct. Day. July. Aug. Sept. Oct. 1 0.89 .89 .89 .95 .95 .74 .74 .74 .77 .77 .74 .74 .77 .68 .74 .62 .65 .65 .62 .60 0.62 .62 .62 .62 .60 .65 .61 .61 .83 .61 .61 .63 .61 .63 .63 .59 .59 .59 .59 .59 0.65 .72 .68 .68 .68 .68 .56 .56 .56 .57 .59 .59 .59 21 0.97 .96 1.07 .95 .95 .96 .68 .68 .89 .86 .68 0.60 '"".'55' .52 .52 .56 .57 .57 .57 .74 0.53 .53 .53 .81 .68 .65 .65 .68 .68 .68 0.92 .92 .92 .89 .89 .89 .82 .80 .70 .81 .83 .86 .95 .97 .97 .97 .97 .97 .97 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29 10 30 31 11 Mean 12 .89 .70 .63 0.62 13 14 15 16 17 18 19... 20 SOUTHERN CALIFORNIA EDISON CO.'S CANAL 1 NEAR AZTJSA, CALIF. LOCATION. — At Southern California Edison Co.'s power house, about 5 miles south- west of intake on San Gabriel River, and 1^ miles north of Azusa, Los Angeles County. Records available.— 1896 to September 30, 1918. Discharge. — Computed from record showing kilowatt output of power plant, on the assumption that 1 second-foot develops 25 kilowatts. Low-water record at power plant not reliable ; discharge computed from weir records obtained at sand box about one-fourth mile below intake. Extremes of discharge. — 1896-1918. Maximum mean daily discharge recorded November 27, 1906 (discharge, 97 second-feet); canal usually dry for a few days each year. Accuracy. — Records good. Diversion dam for canal is on San Gabriel River in SE. ^ SE. J sec. 31, T. 2 N., R. 9 W., about 5 miles above gaging station on San Gabriel River, at the mouth of the canyon near Azusa. The water is used for power development at a point about 1| miles north of Azusa, and after leaving the power plant is divided and used for irrigation; part is discharged into Azusa-Covina canal and the rest into Duarte canal. During the rainy season part of the water from the power plant is wasted back into San Gabriel River below the gaging station. 1 Published in early reports as San Gabriel power canal, and later as Pacific Light & Power Cor- poration's canal. SAN- GABKIEL RIVER BASIN. 407 Daily discharge, in second-feet, of Southern California Edison Co.'s canal near Azusa, Calif., for 1898-1918. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept, 10 10.5 9 8.5 8.5 7.5 7.5 7.9 8.2 8.4 8.4 10.1 10.5 10.5 10.5 11.2 11.2 10.5 10.5 10.5 11 11 5 11.5 11.8 11.9 11.9 12 12 12 12.2 12.5 12.6 12.6 12.6 18.2 15.2 15 15 14.4 14.5 14.5 14.5 14.5 14.5 14.8 14 14.3 14.8 24.2 20.3 19 18 18 19.7 19.3 20.4 21.6 22.8 23.6 24 24 24.1 23.5 23.2 24.2 26.2 26.2 24.2 23.5 23.5 23.5 23.5 23.4 23.4 23.4 23.4 23 21.8 21.6 20.3 20 20 19.7 19.7 19.7 19.7 20.3 22.4 21.8 21.2 21.2 21 34 32.5 34 33.5 33.5 21.5 19.4 18.7 18.5 18 18.5 18.7 18.7 19 19 19 19 19 31.2 36.4 39.5 37.4 32.7 31.7 32.5 35.5 35.4 32 32 31.6 30 29.5 37 37 37.5 36.5 36 35 35 35 34 32.5 32.5 25.3 25.3 27 30 35.5 28 27.5 25.2 24.8 24.8 25 24 22.2 22 23.5 23.5 22.2 21 21 20.5 20 19.7 19.5 19.5 18.5 17 16.5 16.2 17.5 19.3 21 21.3 20.5 18 17.5 31.5 32 31 25 25.5 20 27.5 45.5 40 38.5 33.5 37 36 35 32.5 30.5 30 30 30.5 29.5 30.5 30 17.5 17.5 17 17 15.5 17.5 17.5 16.5 15.5 14 13 13 12.5 12 12.5 14.1 13 13 13.5 11.5 11.5 11.5 11.5 12 12 12 11.5 11.5 12.7 12 13.5 23.5 22.8 21 20.2 20 20 21.5 21.4 21 20.2 18 17.5 16.2 15.2 17 16 17 17.3 17 16 16 16 15.8 15 14.5 22.2 20 17 15 14.8 13.5 12 14.5 13 13.5 13 13 12 14 12.5 11.5 11.5 11 11 10 10 10 10 11.5 11.5 11.5 9.5 9.5 4.2 4.2 3.5 3.4 3.4 3.5 3.4 3 3.4 3.5 3.5 3.3 3 3 3 3 3.3 3.5 3.5 3.5 408 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Southern California Edison Co.'s canal near Azusa, Calif, for 1898-1918— Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1899-1900. 1 3.7 4 4 4 4 4 4.3 3.7 3.7 4.4 8.5 9 22 22 26 19 16 15 13.5 1.3.5 13 1.3.5 14 14 12.5 12 12 12.3 11.5 13 12.3 3.7 4.2 4.7 4.8 4.9 4.9 4.5 4.3 4 4 4.4 4.7 5.6 6.4 5.8 5.3 5.2 5.5 5.6 6 5.7 5.5 5.5 5.8 5.8 5.8. 5.3 5.8 6.2 5.7 5.7 12 11.5 11.5 11.7 10.1 10.2 10.2 10.2 10.3 12 12 12 12 14.5 15 15 15 14 14 14 16 23.5 20 18.3 18 17.2 17 17 16.7 16.3 5.3 5.5 5.5 5.5 5.6 5.8 5.8 5.8 5.8 5.9 5.5 5.7 5.7 5.9 6.2 7.1 13.4 15.6 13.2 1G.7 bSl.S 16.2 16 16 16 16.3 16 16 15.7 15.5 15.5 15.5 15.5 15.5 15.5 16 23 39 30 28 25 23 22.5 21.5 20.7 20.7 20.7 20.7 21 23 23 22 52.6 49.6 48.7 46.2 44.3 42.9 43.5 42.3 35.6 35.6 34.5 31.4 33.6 32.9 32.3 32.4 022 a22 40 50 O50 O40 40 a38 a34 a31 32 a31 O30 30 029.2 a28.5 a2S 21. b a21 026.5 26 a25.4 a24.8 a24.2 24.5 024.4 024.3 24.2 a23.8 23.4 23 28 28 28 28 28 "'35'"' 90 78 71 70 69 69 68 68 67 66 66 66 77 73 70 69 68 68 68 71 70 67 67 a22.8 a22.7 022.6 22.5 23 o22. 5 022.2 21.8 21.5 20.8 20.6 20.5 20.4 20.4 20.3 20.3 19.5 19 19 19 18.7 18.7 17.5 18 18 18 18 17.5 67 67 67 67 5 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 17 17 al7.5 a27.5 a30 a24.5 23 a22 21 20 20 19.5 19.3 20 18 18 18 17.6 18.4 18.2 18.1 18 25 23 20 20 19.5 17.5 17 15.5 15.5 70 70 70 70 70 70 70 69 69 69 69 69 69 69 68 68 68 68 35 57 57 57 57 57 57 39 39 55 55 15.5 16 17 16 16 15.5 20 17.6 16.3 16.1 15 al4.6 ol5 ol5 al4.6 al3. 5 al.3. 5 al3 al3 ol4 fl26 o22 al9 18.5 18.5 19.7 21 21.5 20.6 18.5 55 55 55 55 68 60 56 56 56 56 56 56 59 63 63 70 70 70 70 71.5 71.5 82 82 82 82 82 82 82 84 17 17 16.2 25 a48 54 054 a49 «43 a43 a56 56 52 47 41.6 40.3 39 a38.5 a36.5 «31 a30.5 a29 O30.5 a29.5 027 024 a23.5 a22.5 022 a21 al9.5 72 72 59 59 59 59 59 67 67 67 68 68 68 68 68 68 68 68 68 65 65 65 65 66 66 66 66 66 66 66 66 21 21.5 19.4 018.5 18 17.5 al7.5 al7.5 "'i7.'i' 17.5 17.1 18.1 17.5 16 15.4 14.3 13.7 12.3 11.5 11.7 10.9 10.1 11 10.8 10.1 9.6 9.6 9.1 8.3 66 66 66 63 63 63 63 63 63 63 63 62 62 60 60 60 55 54.5 54 53.5 50 49.5 49.5 49.5 52 48.5 46.5 43.5 41 41 9.9 10.1 9.6 8.4 8.9 7.8 7.4 7.6 7.2 6.6 6.2 5.6 5.1 5.1 7.2 5.9 5.6 5.3 5.3 5.9 5.4 5.4 4.8 4.6 4.3 4.3 4.6 4.2 4.9 4.5 4.1 41 41 41 40 38 36 34 33 33 32.5 32 32 31.5 30 30 30 29 28 27 28 29 27 26 25 24.7 24.2 24.2 24.2 24.2 25 24.2 3.5 .3.5 3.5 3.5 4.4 4.6 4.4 4.3 4.5 4.7 4 4.6 4.3 4.5 4.1 3.9 3.7 4.3 4.6 4.5 4 3.6 3.6 3.6 3.6 3.6 3.7 3.6 3.5 3.9 4.3 23.5 24.2 25 25 26.8 24 23.4 23 22 21 20 20 21 19.5 19.5 19.5 19 21 19.3 19 19 18.5 18 17 15.7 15 15 15 15 15 15 4.5 2 4.7 3 5.2 4 5 5 4.6 6 4.3 7 4.1 8 4 9 4.2 10 4.3 11 4.5 12 4.5 13 4.6 14 4.8 15,. . . 4.5 16 4.1 17. 3.7 18 3.5 19 3.3 20 3.4 21 3.3 22 3.1 23 3.8 24 5.2 25 5.7 26 5.2 27 4.7 28 . 4.3 29 4.2 30 3.9 31 1900-1901. 1 15 2 15 3 . 18.7 4 19 5 18.8 6 19.2 7 19 8 17.9 9 17.3 10.. 17.2 11 16.8 12 13.. 16.6 16.4 14 16.4 15 15.9 16 16 17 15.7 18 15.8 19 15.6 20 15.7 21 16.5 22 /... 18.6 23 19.6 24 . 20.4 25 « 19.1 26 17.9 27 17.5 28 45.2 48 54.8 17.3 29 .. 18.7 30 20.4 31 b Power conduit washed out soon after noon. SA]^ GABRIEL RIVER BASIN. 409 Daily discharge, in second-feet, of Southern California Edison CoJs canal near Azusa, Calif, for 1898-191S— Continued. 21 20 20 20 20 20 17 15.5 16 10 15.5 14.5 14.5 14. 5# 15 15.5 15.5 15.5 14.5 14.5 16 17 18 34 33 32.5 32 32 31 31 31 30 29 29 30 30 29 29 29 29 28.5 28,5 28.5 28.5 30.5 30 29 28.5 27 27.5 25 24.5 24.5 24 23.5 23 22.5 22 22 22.5 23 Mar. Apr. 58 62 60 62 60 62 60 62 61 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 46 62 62 62 62 62 62 62 62 62 60 62 61 62 61 62 62 62 62 62 60 62 60 62 56 62 54 62 52 62 50 62 48 55 48 62 59 72 57 22 57 20 70 20 72 52 72 54 72 54 72 62 72 62 72 62 72 62 72 62 72 62 72 62 72 6? 72 62 72 62 72 62 72 16 72 18 72 40 72 52 72 62 72 62 72 62 72 72 68 72 68 72 68 72 68 72 July. 46 23 46 21 45 20 43 20 43 22 43 25 42 25 40 22 44 22 42 21 40 20 40 20 37 19 37 18 37 16 37 16 36 16 35 14 34 14 34 14 34 14 32 14 30 15 30 15 30 14 30 70 70 70 70 70 70 70 70 70 68 70 70 70 70 70 68 70 68 70 70 70 84 70 84 70 81 70 84 70 84 70 83 70 82 70 81 70 80 70 79.5 70 79 70 79 70 81 50 80 70 73 60 66 60 64 6X 63 70 63 70 62 70 53 52 50 50 49 47 46 43.5 43 43 37.5 37 36.5 36 36 35.5 35.3 34.8 Aug. 34.8 34.8 34.5 32.5 31.5 30.7 30.7 30.7 30.2 30 30 30 26.7 25.8 26.3 26.3 25.8 25.3 27 24.5 27 29 26 34.5 25 31.5 25 31.5 24.5 410 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALirOR:N^IA. Daily discharge, in second-feet, of Southern California Edison Co.'s canal near Azusa, Calif. Jor 1898-1918— Contmued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1903-4. 31.5 31 30 29 26.5 26.5 26 26 26 27.8 24.8 22.8 22.5 22.5 22.5 22 21.6 20.5 21.5 21.5 21 21 21 21 21 21 21 21 21 21 21 10.5 9 10 10 11 12 12.5 15 15.5 15.5 15.5 14.5 13.5 13 13.5 13.5 12 11.5 10.5 9.5 10 10.5 11 11 11 11.5 11.5 11.5 12 12.5 12.5 21.5 22.5 22.5 22.5 22.5 23 23 24.5 24 24 24 24 25 25 25.5 25.5 25.5 24.5 24.5 24.5 25 24.5 23.4 24 24 23.3 23.3 23.3 23.3 21.5 12.5 12.5 12.5 12.5 12.5 12.5 12.5 12 11 11 11.5 12 12.5 12.5 12.5 12.5 12.6 13.3 13 13.5 13.5 13.5 13.5 13 13 13.5 14 14 14.5 14.5 21.5 24 24 23 22.5 24 23.5 24.5 24.5 24.5 24.7 25.5 25 25 25 25 24.5 24.5 24.8 24.8 24.8 24.8 24.5 24.5 24.5 24.5 24 24 24 24 24 15 15.3 15.3 15.3 15.3 14.7 15.2 15.3 16 16 16 16 16 16 16 >s 16 16 16 16 15.5 15.7 16.3 16.8 17 16.7 16 16.7 16.5 16 16 48 24 24 24 24 24 23.5 23.3 24 24.5 24.5 24.5 24 24 23.5 23.5 23.5 23.5 28.2 27.4 27.4 25.5 25.2 24.6 24.5 24.5 24.5 24 23.5 23.5 23.5 23 30 23 21 20 19.5 19 18.5 18.5 41 59 40 35 31 29 27 30 30 28 28 27 55 67 67 57 46 41 40 37 36 34 23 23.5 23.5 2-3.5 59 37 31.5 31 30 30 30 28 28 28 28 40 41 38 34.5 33 31.4 30.8 30 29.5 29.5 29.5 30 38 34 67 70 78 68 78 69 86 74 66 66 66 66 66 66 67 66 68 69 68 68 68 68 67 68 67 67 67 47 51.5 47 42 40 38 37.5 35.5 35 35.5 60 60 56 51 49 46 44.5 42.6 41.5 50 48 46 62 62 62 62 62 62 66 66 66 67 67 67 67 67 72 72 72 72 72 72 70 79 80 80 80 79 80 80 78 57 54 69 80 80 80 80 80 80 66 66 66 66 66 66 66 68 68 68 68 68 66 64 64 61 58 57 66 66 66 66 67 67 67 67 67 67 67 67 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 67 67 67 67 67 67 67 67 67 67 67 66 65 64 61 59 56 55 53 51 49 48 44.5 44.5 46 51 46.5 40 40 37 38 80 80 80 80 80 80 80 48 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 38 36.5 35.5 32.5 32 31 30 30 29 28 26.5 25.2 25.2 23 « 24 23 22.5 22 22 22 25 23 23 23 22 19 18.5 18.5 18.5 17.5 80 80 80 80 80 80 80 80 80 80 73 73 76 76 78 78 78 78 78 78 88 84 84 84 84 84 84 84 84 18 17.5 17 17 16.5 16 16 15.7 15.5 15 13.8 14 14.3 15.5 15 15 14 14 13 12.5 11.8 12 12 11.1 11 11 12 11.5 12 12 11 85 85 86 85 85 86 86 85 85 85 71 74 75 74 74 74 74 74 73 73 70 69 68 67 64 62 64 62 60 68 56 10 9.5 10 10 10 10 12 12.7 11.5 11.5 11 10 29 15 14.5 14 14 13.7 13.7 13.7 13.5 15 15 14.5 14.5 13 12.5 11.5 11.3 11 11 55 54 54 53 52 50 47 46 45 45 46 44 44 43 43 42 41 40 41 41 40 40 39 38 38 36 36 35 34 33 33 11 2 10.5 3 10.5 4 10.8 5 11 6 9 7 8.5 8 7.5 9 8.5 10 9.5 11 9.5 12. .. 9.5 13 12.5 14 11.5 15 11 16 10 17 11 18 12 19 12 20 12 21 12 22 12 23. 11 24 12 25 12.7 26 13.5 27 12.5 28 12 29 10.5 30 10.5 31 1904-5. 1 34 2 33 3 32 4 33 5 34 6 35 7 34 8 33 9 32 10.. 32 11 32 12 32 13 32 14 31 15 31 16 30 17 31 18 31 19 30 20 29 21 29 22 28 23 30 24 30 25. . . 30 26 29 27 30 28 31 29 32 30 31 31 SAN GABRIEL RIVER BASIN. 411 Daily discharge, in second-feet, of Southern California Edison Co.^s canal near Azusa, Calif , for 1898-1918— Gontinned. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1905-6. 1 30 29 28 28 28 28 28 28 27 27 27 27 28 29 29 29 30 30 30 29 29 31 32 31 30 29 29 28 28 29 28 42 42 42 42 41 40 40 40 40 40 40 40 40 39 38 38 39 39 40 41 40 40 40 40 40 40 39 38 38 38 38 29 29 29 29 29 32 44 95 53 42 38 36 36 34 34 45 53 43 40 42 41 39 38 37 37 37 97 87 62 53 38 38 38 38 38 39 39 39 38 38 38 38 38 38 38 38 38 37 37 38 41 45 47 45 45 46 46 45 45 45 50 47 45 44 44 42 42 41 39 37 37 37 38 39 39 39 39 39 38 46 42 39 38 37 38 38 38 38 37 37 38 45 46 68 64 51 51 47 47 50 76 60 75 76 76 76 76 76 76 76 72 65 62 59 58 58 76 76 76 76 76 76 37 37 37 37 37 37 37 37 37 36 36 37 37 49 52 41 41 42 76 76 76 76 76 66 66 61 57 58 54 52 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 50 50 49 50 63 63 56 47 47 57 72 69 15 15 15 15 40 74 74 74 75 74 74 74 70 70 73 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 75 68 65 20 20 74 70 70 71 64 56 74 74 74 77 78 78 78 77 75 72 71 65 78 76 78 78 78 76 76 78 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 78 52 58 76 74 76 78 78 77 76 65 74 78 76 76 76 72 76 76 76 76 76 76 76 76 76 76 76 78 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 53 48 60 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 54 52 54 65 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 72 68 68 68 68 68 66 64 60 60 59 59 58 57 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 54 2 55 3 53 4 52 5 52 6 50 7 50 8 49 9 49 10.. 49 11 49 12 49 13 50 14 50 15 52 16 51 17 50 18 46 19 45 20 45 21 44 22 44 23 43 24 43 25 .... 43 26 43 27 43 28 43 29 42 30 42 31 1906-7. 1 76 2 76 3 76 4 76 5 76 6 76 7 72 8 67 9 59 10. 59 11 57 12 57 13 57 14 57 15 57 16 57 17 57 18 . 57 19 57 20... 56 21. 53 22 51 23 50 24 50 25 50 26 50 27 50 28 50 29 50 30 51 31 412 SUEFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Southern California Edison Co.^s canal near Azusa, Calif, for 1898-1918— Contijiued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1907-8. 1 51 50 50 50 58 63 60 56 54 50 50 50 50 50 66 76 76 75 70 67 61 66 76 76 76 76 76 76 76 76 76 30 31 38 36 35 34 32 30 30 29 29 30 32 32 32 34 40 40 39 39 38 36 34 34 34 32 33 32 32 32 32 76 76 76 71 69 66 65 66 67 76 73 66 64 ea 62 61 58 59 59 61 61 61 61 58 57 57 57 57 56 55 32 32 32 32 32 31 32 32 32 32 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 36 35 34 34 54 54 53 54 54 54 76 76 67 63 66 62 58 57 57 57 57 57 57 57 56 55 55 54 54 54 54 65 67 57 57 34 57 80 80 81 67 47 44 44 43 43 43 41 41 43 40 40 40 40 40 40 40 40 40 40 39 39 39 39 56 54 54 52 52 51 51 50 50 50 50 48 49 76 76 66 58 56 56 56 54 54 65 76 76 76 76 76 76 76 76 39 39 39 39 39 39 39 39 62 82 58 58 76 69 62 62 62 62 59 58 69 32 63 62 64 62 62 62 62 62 62 76 76 76 76 76 76 76 76 76 76 76 76 76 76 i?6 76 76 76 76 76 76 76 76 76 76 76 76 76 66 67 67 67 67 67 67 67 67 67 66 65 66 66 66 66 67 67 67 67 67 67 67 67 67 67 67 67 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 1? 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 76 76 76 76 76 76 76 76 76 76 It 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 76 76 76 76 76 76 76 76 76 27 76 76 76 76 76 76 76 7C 76 76 76 76 76 76 76 76 76 76 76 76 76 67 67 67 67 67 67 67 67 67 67 62 62 34 30 39 40 40 40 40 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 56 54 53 52 51 50 49 40 40 65 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 66 67 67 68 67 67 69 69 68 69 66 48 47 45 44 45 43 43 42 42 42 42 42 42 41 40 39 39 39 39 38 37 37 36 36 36 36 36 36 35 34 33 66 68 68 69 68 68 09 69 69 69 68 68 68 68 68 68 68 68 68 67 67 66 66 67 67 67 68 67 64 62 61 37 42 43 42 40 40 39 39 37 42 41 39 38 37 37 37 35 34 34 32 32 31 30 30 30 30 30 29 29 29 29 59 59 58 56 56 55 55 52 53 52 51 50 49 48 48 48 49 56 56 53 49 48 47 45 44 43 43 43 42 52 51 29 2 29 3....: 28 4. . 26 5 26 6 26 7 26 8 28 9 :. 29 10 32 11.... 30 12 28 13 27 14 26 15 26 16 26 17. 27 18 19 28 27 20 26 21 28 22 28 23 26 24 62 25 54 26 39 27 36 28 33 29 32 30 31 31 1908-9. 1 52 2 . . 48 3 45 4 45 5. . 43 6 42 7 43 8 42 9 40 10 40 11 38 12 39 13 38 14. 37 15 37 16 36 17 36 18 36 19.... 35 20 35 21 35 22 35 23 . 35 24 36 25 37 26 38 27 38 28 37 29 36 30 37 31 SAN GABRIEL EIVER BASIN. 413 Daily discharge, in second-feet, of Southern California Edison Co.^s canal near Azusa, Calif., for 1898-1918— Continued, Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. Jxine. July. Aug. Sept. 414 SURFACE WATER OF PACIFIC SLOPE, SOUTHER!^ CALIFORNIA. Daily discharge, in second-feet, of Southern California Edison Co.^s canal near Azusa, Calif., for 1898-1918— Gontmued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1911-12. 1 67 70 66 60 56 55 52 51 52 51 51 50 48 47 45 44 45 45 45 44 44 44 44 44 44 45 53 55 53 53 51 24 25 32 37 39 35 34 34 33 32 30 30 30 29 29 28 28 27 27 26 26 26 28 27 26 26 30 32 32 32 30 49 49 45 45 46 47 47 46 47 49 52 51 50 50 49 50 47 46 47 47 47 47 47 46 46 43 44 44 44 44 29 27 28 28 28 28 28 27 28 31 35 32 30 31 30 30 30 30 30 30 28 28 29 28 28 28 28 27 27 30 44 43 43 44 45 50 56 49 47 46 46 45 45 46 46 46 48 48 47 47 47 45 46 45 45 45 46 47 54 50 48 31 30 30 30 30 29 28 28 28 28 28 27 26 26 27 27 29 29 28 29 28 28 29 30 30 29 29 29 29 29 29 48 53 49 48 49 49 48 48 47 47 48 48 47 45 45 45 45 45 45 44 44 42 42 42 42 44 44 42 41 42 29 28 28 28 27 25 25 28 .30 32 32 32 32 32 51 68 68 69 68 60 51 47 45 43 42 42 42 42 42 42 41 42 42 41 i\ 40 40 40 41 40 40 40 40 40 38 38 39 38 38 36 36 38 37 36 37 37 37 37 35 40 40 40 40 39 40 56 73 73 73 73 73 73 72 70 68 64 64 64 61 59 68 59 77 77 77 77 77 40 42 39 56 72 72 71 74 74 74 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 30 77 75 75 75 75 75 75 75 75 74 74 73 75 75 75 75 75 75 74 74 18 24 37 44 51 77 77 77 77 77 77 77 ?? 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 54 58 59 69 75 77 63' 57 60 76 76 76 76 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 76 76 75 74 74 73 73 72 70 68 67 66 66 70 68 64 59 77 77 77 75 77 77 77 77 77 77 77 77 77 77 77 77 77 77 76 75 72 72 73 75 71 69 67 66 63 63 59 59 57 60 62 58 56 54 55 54 53 51 48 46 46 44 44 42 40 39 37 34 35 36 38 42 57 61 50 42 61 61 64 69 62 58 57 56 54 53 52 50 49 49 48 48 50 50 48 46 44 43 44 42 42 41 41 40 41 41 41 39 38 35 35 34 31 31 29 28 27 25 25 26 25 26 24 23 22 22 24 28 27 25 24 24 26 29 26 26 25 24 39 40 39 37 36 34 34 33 32 32 32 32 32 32 31 32 32 34 33 32 30 30 29 28 28 28 27 27 28 28 28 23 22 20 18 17 17 16 16 17 19 17 17 17 17 17 17 17 17 16 15 16 16 18 16 17 16 17 16 16 20 20 28 2 28 3 . 28 4 30 5 31 6 30 7 28 8 29 9 29 10 28 11 27 12 28 13 26 14 25 15 25 16 26 17 25 18 24 19 25 20 24 21 24 22 23 23 23 24 25 25 25 26 24 27 24 28 23 29 23 30 23 31 . . 1912-13. 1 20 2 21 3 21 4 17 5 16 6 16 7 16 8 17 9 16 10 15 11 15 12 15 13 14 14 14 15 14 16... . 13 17 13 18 13 19 13 20..... 13 21 13 22. 13 23 14 24 16 25. 15 26 14 27 14 28 14 29 13 30 13 31 Note.— Mar. 30, 1913, water out of canal 6 a. m. to 7 p. m.r mean discharge for day estimated. SAN GABKIEL RIVER BASIl^. 415 Daily discharge, in second-feet, of Southern California Edison Co.'s canal near Azusa, Calif., for 1898-1918— Continued. Day. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 416 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Southern California Edison Co.^s canal near Azusa, Calif., for 1898-1918— Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1915-16. 1 48 47 48 47 46 45 45 45 44 45 46 47 47 47 48 48 46 46 45 44 44 44 44 43 43 42 42 42 41 42 43 82 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 85 80 76 78 77 76 74 43 43 43 42 44 54 60 56 57 61 57 68 54 52 52 52 51 50 50 50 49 49 50 49 48 49 49 49 49 49 73 72 72 72 77 75 75 73 72 71 70 71 70 68 68 68 68 67 68 .68 67 66 66 66 67 67 66 67 67 66 49 48 48 69 67 60 58 58 55 56 55 56 55 72 76 65 62 61 60 59 58 56 56 54 54 53 53 54 53 61 62 66 67 76 79 73 71 70 70 70 68 67 66 65 64 63 63 65 65 65 65 65 65 62 90 90 90 90 82 87 90 90 63 74 80 80 80 80 80 80 80 80 80 80 80 80 80 80 15.9 .0 80 70 80 80 80 80 80 80 80 52 80 80 80 90 90 90 90 90 90 84 84 84 84 84 84 84 84 87 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 90 90 . 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 45 45 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 45 45 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 88 87 84 83 76 74 72 71 70 69 68 67 67 66 67 65 62 02 63 90 90 90 90 90 90 84 81 79 79 80 80 80 80 80 80 80 79 77 76 73 72 72 70 70 67 67 67 65 61 62 60 59 59 58 67 57 66 55 54 52 51 51 50 50 48 46 45 45 43 42 44 42 42 43 44 42 44 76 57 57 51 59 68 61 58 62 61 59 55 62 62 61 60 58 57 60 59 61 61 60 58 60 57 53 57 57 56 55 54 54 62 52 50 48 44 45 44 43 40 39 38 38 37 37 37 36 34 34 33 33 32 32 32 31. 34 32 32 30 30 29 28 27 27 51 2.. 48 3 .... 60 4 49 5 49 6. 49 7. 50 8 48 9 48 10. 47 11.... 47 12 45 13 45 14 44 15 42 16 43 17 43 18 45 19 45 20 47 21 47 22 48 23 49 24 48 25 49 26 49 27 48 28 46 29 44 30 54 31 1916-17. 1 29 27 3 27 4 28 5 27 6 27 7 27 8 27 9 25 10 24 11 24 12 ..... 24 13 24 14 24 15 24 16... 24 17 24 18 24 19 2S 20 24 21 24 22 24 23 27 24 27 25 27 26 27 27 24 28 26 29 24 30 ... 24 31 SA:N- GABRIEL RIVER BASII^. 417 Daily discharge, in second-feet, of Southern California Edison Co.^s canal near Azusa, Calif. Jor 1898-1918— Gontmned. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1917-18. 1 24 24 23 23 22 22 22 22 22 22 22 24 27 28 29 31 32 31 27 28 27 26 25 24 24 23 24 26 27 27 26 24 24 24 24 26 37 40 36 34 33 32 32 32 32 32 32 32 32 29 29 29 30 31 32 32 32 32 32 32 32 32 32 32 34 34 33 33 32 32 32 32 32 33 33 33 32 32 32 32 32 32 32 32 33 33 33 33 33 32 32 32 32 32 32 32 32 31 31 31 32 31 30 31 33 33 33 33 33 33 32 32 32 32 32 32 38 38 36 35 35 35 35 35 34 34 33 32 32 34 33 32 32 32 31 31 32 32 32 32 61 46 64 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 "■"52" 90 90 90 90 * 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 80 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 88 89 88 87 84 82 83 81 83 81 76 78 74 73 72 71 70 69 70 69 68 68 65 65 62 61 60 58 57 57 57 57 58 58 55 53 52 51 50 52 52 49 46 48 48 50 49 47 48 47 47 46 48 50 53 51 49 47 47 46 44 42 42 40 39 41 40 43 41 41 42 2 41 3... 39 4.. 40 5 39 6 35 7 37 8 36 9 36 10 35 11 34 12 34 13 . 34 14 38 15 39 16 41 17.. 40 18 37 19 37 20 38 21 35 22 38 23 38 24 38 25. 37 26 36 27 56 28 55 29 48 30 . 43 31 Note.— No flow Apr. 1-13. Monthly of Southern California Edison Co. 1896-1918. s canal near Azusa, Calif, for Discharge in second-feet, Maxi- Mini- mum, mum. Run-off (total in acre- feet). Discharge in second-feet Maxi- Mini- Run-off (totalin acre- feet). 1896. January February... March April May June July August September.. 1,599 1,726 2,214 2,559 2,214 1,131 738 861 774 The period.. 13,800 1896-97. October November... December. .. January February March April May June July August September... 17 1,012 20 1,230 17.56 1,072 13.10 726 17.14 1,051 35.30 2,102 62.97 3,810 63.20 3,759 38.13 2,343 26.45 1,613 20.66 1,226 The year. . 28. 5 20, 1897-98. October November. . . December... January February March April May June July August September... The year. 1898-99. October November. . . December... January February March April May June July August September... The year 10 16 25 23 10 28 25.3 20.0 14.5 9 5 6.1 18.03 23.30 26.84 26 29 35 33 32 19 11 7 1,106 1,385 1,648 1,591 1,618 2,129 1,950 1,947 1,159 672 456 467 16, 100 11.7 15 20 18 16 12 5 533 580 832 1,340 1,244 1,623 1,262 842 565 221 295 220 9,560 142131°— 21— wsp 447- 418 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Monthly discharge of Southern California Edison Co.''s canal near Azusa, Calif ., for 1896-1918— Continued. Month. Discharge in second- feet. Run-off (total in acre- feet). Month. Discharge in second- feet. Run-off (total in Maxi- mum. Mini- mvun. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1899-1900. October 26 24 39 50 23 30 26 56 22 10 5 6 4 10 16 22 18 16 13 16 8 4 4 3 11.1 14.0 20 30 20 20 17 35 15 6 4 4 683 847 1,247 1,845 1,111 1,230 1,012 2,152 893 369 246 238 1904-5. October 15.5 14.5 48 67 86 80 80 80 88 86 55 35 ' 9 11 14.7 18.5 34 80 80 56 33 28 12.0 12.8 16.9 35.2 67.8 68.8 80.0 80.0 77.5 74.2 42.8 31.4 738 November December November December January 762 1,040 2,160 February March February March 3,770 4,230 April April 4,760 Mav May 4,920 June 4,610 July- July 4,560 August 2,630 September September The year 1905-6. October 1,870 The year... 56 3 16.3 11,900 88 49.8 36,000 1900-1901. October 6 55 53 90 70 70 84 72 66 41 27 20 4 5 31 5 35 55 59 41 24 15 15 5 14 40 58 67 63 67 66 56 30 20 17 307 833 1,269 3,566 3,721 3,874 3,987 4,058 3,332 1,845 1,230 1,012 32 97 50 76 76 78 78 76 76 76 76 55 27 29 37 15 20 52 48 52 76 57 42 28.8 44.7 40.1 48.3 56.5 69.8 74.3 73.8 73.4 76.0 70.5 47.7 1,770 November December November December 2,660 2,470 2,970 February February March 3,140 4,290 April April 4,420 May May.:::;:::::::: 4,540 June June 4,370 July July .. . . 4,670 4,330 September September The year..... 1906-7. October 2,840 The year.... 90 41.9 29,000 97 68.7 42,500 1901-2. October 64 50 30 51 63 62 62 48 29.5 17 8.5 6 29 26 24 27 55 46 30 13.5 7.5 6 4.5 21 32 27 28 34 61 59 39 20 11 7 5 1,291 1,904 1,660 1,722 1,888 3,750 3,510 2,398 1,190 676 430 298 42 47 76 76 76 76 76 76 76 76 76 76 38 37 45 76 76 76 76 76 76 76 50 39.8 40.4 65.5 76.0 76.0 71.1 76.0 76.0 76.0 76.0 76.0 59.6 2,450 November December January November December January 2,400 4,030 4,670 February March February March 4,220 4,370 April April 4,520 MSy.:::::::::::: May 4,670 4,520 July July 4,670 August 4,670 3,550 September September The year 1907-8. The year 64 28.7 20, 700 76 67.3 48,700 1902-3. October 10 62 68 68 74 72 72 70 84 58.5 34.8 34.5 6 8 16 22 61 57 50 62 34.8 24.5 21 7.1 18.9 31.8 30.2 69.6 70.5 52.0 68.6 74.2 43.4 28.6 24.6 437 1,120 1,960 1,860 3,870 4,330 3,090 4,220 4,420 2,670 1,760 1,460 76 76 76 76 76 76 76 76 76 48 43 62 50 55 53 48 76 76 76 27 49 33 29 26 64.0 63.8 58.6 61.0 76.0 76.0 76.0 74.4 70.4 39.8 35.3 30.6 3,940 3,800 3,600 3,750 4,370 4,670 November December January November December February March February March April April 4,520 4,570 May May June June 4,190 July July 2,450 2,170 1,820 August September September The year 1908-9. The year 84 43.1 31. 200 76 26 60.4 43,800 1903-4. October 31.5 25.5 25.5 28.2 59 66 68 67 38 18 29 13.5 20.5 21.5 21.5 23 35 57 37 17.5 11 9.5 7.5 23.7 23.8 24.3 24.4 30.7 50.8 65.7 56.5 25.5 14.0 12.9 10.8 1,460 1,420 1,490 1,500 1,770 3,120 3,910 3,470 1,520 861 793 643 40 36 81 82 67 67 67 67 69 69 59 • 52 29 31 34 39 65 67 40 61 42 35 33.6 32.9 46.7 56.3 66.7 67.0 64.8 34.1 64.8 67.2 50.7 39.0 2,070 1,960 2,870 3,460 3,700 4,120 3,860 2,100 November December January November December February March February April April .... May May June 3,860 July July 4,130 August 3,120 2,320 September September The year.... The year 68 30.2 22,000 82 51.9 37,600 SAN GABRIEL RIVER BASIN. 419 Monthly discharge of Southern California Edison Co.^s canal near Azusa, Calif., for 1896-1918— Continued. Discharge in feet. Maxi- Mini- mum, mum. Run-ofl (total in acre- feet). Discharge in second- feet. Maxi- mum. Mini- mum. Run-off (total in 37.5 48.0 70.0 67.5 72.5 73.0 72.3 71.1 59.8 39.9 27.8 23.1 25.4 31.4 32.8 59.4 72.9 66.1 73.1 69.5 71.4 70.7 58.7 45.0 56.4 50.8 47.0 46.7 44.1 38.8 70.6 53.1 73.0 74.2 49.8 31.9 26.0 50.6 29.8 29.0 28.6 41.0 63.1 75.5 77.0 73.2 48.6 27.5 17.4 15.0 2,310 2,860 4,300 4,150 4,030 4,490 4,300 4,370 3,560 2,450 1,710 1,370 39,900 1,560 1,870 2,020 3,650 4,050 4,060 4,350 4,270 4,250 4,350 3,610 2,680 40, 700 3,120 2,800 2,870 2,710 2,230 4,340 3,160 4,490 4.420 3,060 1,960 1,550 36,700 1,830 1,730 1,760 2,520 3,500 4,640 4,580 4,500 2,890 1,690 1,070 14.8 910 36.8 2,190 35.3 2,170 39.0 2,400 33. 4 1,850 19.7 1.210 63.5 3,780 1913-14. May June , . . July August September. . . The year 1914-15. October November. . . December... January February March April May June July August September. . . The year 1915-16. October November. . . December... January February March April May June July August The year 1916-17. October November. . . December... January February March April May June July August September. . . The year 1917-18. October November. . . December... January February March April May June July August September. . . The year. 78.5 80.0 80.0 59.1 45.8 45.0 41.0 62.7 65.1 80.0 82.6 88.0 89.4 90.0 90.0 64.8 54.9 71.1 45.0 50.6 58.2 73.4 80.0 80.0 82.3 87.1 90.0 77.5 58.0 47.2 87.0 69.4 72.9 88.4 90.0 90.0 87.0 90.0 78.4 51.0 35.7 25.4 72.0 25.3 31.0 32.5 32.9 51.6 90.0 49.7 90.0 88.7 64.5 46.2 39.2 53.5 420 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. TUNNEL DIVERSION NEAR AZTJSA, CALIF. Location.— About on line between sees. 22 and 23, T, IN., R. 10 W., at weir box where water is divided between Azusa and Duarte canals, 1,000 feet northeast of Southern California Edison Co.'s power plant, and 1^ miles north of Azusa, Los Angeles County. Records available. — October 1, 1917, to September 30, 1918. Dischargemeasure- ments only. May 31, 1916, to May 28, 1917. Gage. — Gage heights are determined by measuring distance to water surface from ref- erence point on north wall of weir box. (See PI. X, C, p. 61.) Read by B. Bunje. Discharge measurements. — Made by wading near reference point. Channel and control. — Concrete weir box. Accuracy. — Stage-discharge relation permanent. Rating curve well defined. Gage read to half-tenths daily. Daily discharge ascertained by applying daily gage height to rating table. Records good. The intake of this canal is on San Gabriel River about 600 feet above gaging station of the United States Geological Survey on San Gabriel River near Azusa. Water is used to augment the irrigation supply obtained from the tailrace of the Southern California Edison Co.'s power plant and to provide a supply if the water is shut out of power canal. Discharge measurements of tunnel diversion tiear Azusa, Calif., for 1916-1918. Date. Made by- Gage height. Dis- charge. Date. Madeby- Gage height. Dis- charge. 1916. May 31 J.C.Dort Feet. Sed.-fi. 36 54 48 16 12 7.6 1.2 .7 33 : 20 1918. May 28 Apr. 7 13 19 May 1 10 17 18 24 June 5 6 15 21 F.C.Ebert Feet. Sec.-ft. 28 June 5 F. C. Ebert do H. J. Tompkins 1.36 22 10 J.C.Dort 40 30 H. J. Tompkins Sopp and Tompkins F.C.Ebert i.29 1.24 1.15 1.24 .98 .95 1.28 1.37 1.69 25 July 8 12 F. C. Ebert ■ 28 J.C.Dort do C, W. Sopp 34 21 F. C. E bert 30 Aug. 12 H. J. Tompkins Sopp and Tompkins... C. W. Sopp 48 F.C. Ebert .... 49 1917. Apr. 7 25 Ebert and Sopp F. C. Ebert 28 22 H. J. Tompkins do H. J. Tompkins 8.6 May 17 F.C.Ebert 4.8 Daily discharge, in second-feet, of tunnel diversion near Azusa, Calif., for the year ending Sept. 30, 1918. Day. Apr. May. June. Day. Apr. May. June. Day. Apr. May. June. 1 15 20 20 20 22 25 25 40 11 35 35 12 29 29 29 ■ 29 32 38 1 37 35 32 29 , 26 i 20 ! 16 i 16 14' 11 45 CO 40 29 10 7 7 35 35 42 32 32 38 38 42 42 49 49 32 35 14 12 12 8.5 8.5 8.5 7 6 5 4 21 23 29 29 29 29 29 29 37 35 35 35 38 42 46 48 49 49 46 46 43 38 3 2 12 «. 22 2 3. . 13 23 4 14 24 5 15 . 25. 6 16 26 7 17. 27 8 18 28 9 19 29 10 20 30 31... Note.— No flov; Oct. 1 to Apr. 2 and June 23 to Sept. 30. Discharge for Apr. 3-6 and 8-12 estimated by observer; Jime 17-22 interpolated. SAN GABRIEL RIVER BASIN. 421 Monthly discharge of tunnel diversion near Azusd, Calif., for the year ending Sept. 30, 1918. Discharge in second -feet. Maximum. Minimum. Mean. 60 49 38 12 26.7 37.8 11.8 60 6.37 Rvm-ofl (total in acre-feet). April , May , June The year. 1,590 2,320 702 4,610 ROGERS CREEK NEAR AZTJSA, CALIF. LocATiON.^ — In southwest corner of sec. 14, T. 1 N., B. 10 W., half a mile above mouth of creek, and 2\ miles north of Azusa, Los Angeles County. Drainage area. — 6.4 square miles (measured on topographic map). Records available.— October 1, 1917, to September 30, 1918. (Discharge measure- ments only May 8, 1916, to June 11, 1917.) Gage. — Stevens water-stage recorder on left bank at mouth of canyon, one-half mile above junction with San Gabriel River. (See PI. XI, B, p. 236.) Discharge measurements. — Made by wading or from cable about 150 feet below gage. Channel and control. — Boulders, gravel and solid rock; fairly permanent. (See PI. XIII, A.) Extremes op discharge. — Maximum stage during year from water-stage recorder, 5.25 feet at 11.30 p. m. March 10 (discharge, 332 second-feet); stream dry October 1 to November 10 and July 20 to September 30. Diversions. — None above. Regulation. — None. Accuracy.— ^Stage-discharge relation not permanent throughout year. Rating curve well defined below 150 second-feet. Daily discharge ascertained by applying to the rating table mean daily gage height determined by inspecting recorder graph, except March 7, 10, anl 11, when hourly discharge was averaged. Records good. Discharge measurements of Rogers Creek near Azusa, Calif., for 1916-1918. Made by- Gage height Dis- charge. Made by— Dis- charge. 1916. May 8 June 10 29 July 12 Aug. 12 1917. Jan. 9 Feb. 15 Mar. 15 Apr. 17 25 June 11 Dec. 27 1918. Feb. 19 22 23 H. J. Tompkins. . J. C. Dort H. J. Tompkins. . J. C. Dort H. J. Tompkins. . H. J. Tompkins ...do ...do ...do ...do do E. Tompkins.. H. J. Tompkins. . F. C. Ebert do 2.63 1.66 Sec-ft. 2.9 3.0 2.6 1.6 5.9 3.3 1.7 1.1 1918. Feb. 25 11 15 21 23 30 Apr. 8 13 19 26 May 7 21 June 6 21 July 13 C. W. Sopp F.C. Ebert H. J. Tompkins. F.C. Ebert.... C. W. Sopp do .....do F.C. Ebert do do H. J. Tompkins. do C. W. Sopp H. J. Tompkins. C. W. Sopp H. J. Tompkins. do ...-do ...-do Feet. 1.71 1.70 1.18 1.11 2.37 3.55 2.32 L90 1.80 1.60 L46 1.50 1.29 1.28 1.18 1.11 1.00 .82 .72 Sec-ft. 8.4 7.9 1.6 1.4 27 103 27 15 12 7.9 5.1 6.1 3.6 3.2 2.5 2.0 .9 .33 .13 422 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Rogers Creek near Azusa, Calif., for the year ending September 30, 1918. r>ay. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1 0.2 .2 .1 .1 .1 .1 .1 .1 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 0.1 .1 .1 .1 .1 .05 .05 .1 .1 . .1 .1 .1 .1 .2 .2 .1 .1 .1 .1 .1 .1 .1 .1 .1 .2 .2 .1 .1 .1 .1 .1 0.1 .1 .1 .1 .1 .1 .2 .2 .2 .1 .1 .1 .1 .1 .1 .1 .2 1.2 .4 .8 6.4 28 8 3.2 9 7.5 5.6 3.2 2.4 1.8 1.6 1.3 1.5 5 96 32 16 45 144 89 65 41 28 22 19 16 19 17 15 13 12 12 11 10 10 9 8.5 8 7.5 7.5 7.5 7.0 6.5 6.0 5.5 5.5 5.0 4.8 4.8 4.6 4.6 5.5 4.8 4.3 4.1 3.8 3.3 3.0 ,3.0 3.0 3.0 3.0 3.0 3.1 3.1 3.0 2.8 2.8 2.6 2.3 2.2 2.1 2.2 2.3 2.4 2.3 2.3 2.3 2.3 2.1 2.0 1.8 1.7 1.8 1.8 1.9 1.9 1.8 1.8 1.8 1.7 1.6 1.7 1.7 1.7 1.7 1.8 1.8 1.7 1.6 1.6 1.4 1.2 1.2 1.2 1.0 1.0 .9 .8 .8 .8 .8 .7 .7 .6 .6 .6 .5 .6 .6 .5 A .5 .6 .5 .5 .4 .4 .4 .5 0.6 .4 .3 .3 .2 .2 .2 .2 .1 .1 .1 1 .1 .2 .2 .2 .1 .04 .02 2 3 . 4 5 6 7 8 9 10 11 0.05 .1 .3 .3 .3 .3 .3 .2 2 .2 .1 .2 .2 .2 .2 .2 .2 .2 .2 .2 12 13 14 15 16 17 18 19 20 21 22 23 ■ 24 25 26 27 28 29 30 31 Monthly discharge of Rogers Creek near Azusa, Calif., for the year ending September SO, 1918. Discharge in second- feet. Maxi- Mini- mum, mum. Run-off (total in acre- feet). Discharge in feet. Maxi- mum. Mini- mum. Run-off (total in acre- feet). November. December . January . . . February. . March April 0.3 .2 .2 144 7.5 0.0 .05 .05 .1 1.3 2.6 .110 2.69 8.21 5.04 6.76 149 1,540 259 May June July The year 1.94 .743 .118 119 44.2 7.26 2,140 Note.— No flow in months for which record is not given. SAN DIMAS CREEK NEAR SAN DIMAS, CALIF. Location.— In SW. \ NE. I sec. 25, T. 1 N., R. 9 W., at mouth of San Dimas Canyon, 3 miles northeast of San Dimas, Los Angeles Connty. Drainage area.— 18.3 square miles (measured on topographic map). Elevation. — About 1,250 feet above sea level. Records available. — December 3, 1916, to September 30, 1918. (Discharge measure- ments only Apr. 14 to Sept. 4, 1916.) Gage. — 'Gurley graph water-stage recorder, on left bank at mouth of canyon, just above concrete control. (See PL XII, ^, p. 237.) U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 447 PLATE XIII ^^ ^i B^^pHK ^m 3 S S-^^^m ^^V Tf '^m 1 k |. :.V..- W*. ^-| HI *^'T- ' ^S 4. '- -^^-j^^' -^^^^ k. - ^H ^H9 ^^^^ H^^B l^^l^R^^Hp 6' J ^j^tej'^^c^^HB ^^^ra ^' ■'^'^'.^'' - .'j>^'-. "'^'"'''^^Sji^^^a *t 'x\ ' . ^ . .^ ...^^hI CONCRETE WELL AND HOUSE FOR WATER-STAGE RECORDERS. A. Rogers Creek near Azusa, Calif.; B. Fish Creek near Duarte, Calif.; C, Little Santa Anita Creek near Sierra Madre, Calif. U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 447 PLATE XIV A. CONCRETE WELL AND SHELTER ON SAWPIT CREEK NEAR MONROVIA, CALIF. B. DOUBLE CONCRETE-BOULDER CONTROL ON EATON CREEK NEAR PASADENA, CALIF. C. CONCRETE WELL, HOUSE, AND CONTROL ON ARROYO SECO NEAR PASADENA, CALIF. SAl^ GABRIEL RIVER BASII^. 423 Discharge measurements.— Made from cable 50 feet above gage or by wading at various sections above gage. Channel and Control. — Sand, gravel, and boulders; shifting. Control is low con- crete dam built across channel just below gage well. Janaary 18-23, 1918, this dam was raised about 2 feet. Gravel fills in above and below dam affecting stage-dis- charge relation. Left bank is steep and not subject to overflow; right bank is brushy and will be overflowed during high stages. Extremes OF DISCHARGE. — 1916-1918: Maximum stage recorded, 4.90 feet at 4 p. m. December 24, 1916 (discharge, 770 second-feet); stream dry during a part of Octo- ber and November, 1916. Diversions. — None above. The San Dimas Water Co. diverts water for irrigation 150 feet below gage. Accuracy. — Stage- discharge relation not permanent, due to deposits of gravel above , and below concrete control. Rating curve fairly well defined. There were several short periods when water-stage recorder was not in operation; discharge interpolated. Daily discharge ascertained by applying to the rating table mean daily gage height determined by inspecting recorder graph, except March 12-18; April 5-17; and May 8 to June 27, 1918 when discharge was computed by shifting- control method. Records good. Cooperation. — San Dimas Water Co. furnished observer for water-stage recorder. Discharge measurements of San Dimas Creeh near San Dimas, Calif., for 1916-1918. Date. Made by- Gage height. Dis- charge. Date. Made by- Gage height. Dis- charge. 1916. Apr. 14 26 May 13 H. J. Tompkins Feet. 13 10 9.1 5.6 4.4 4.7 1.5 1.9 5.2 3.6 8.6 18 5.0 12 81 21 22 11 10 8.9 6.0 5.7 5.5 5.8. 5.8 .97 .75 1917. Sept. 18 Oct. 22 Dec. 7 1918. Jan. 21 25 Feb. 18 21 22 23 25, Mar. 7 15 18 20 22 29 Apr. 4 8 18 May 7 17 28 Jime 28 July 19 26 Sept. 4 H. J. Tompkins do do C. W. Sopp Feet. .62 .68 .76 Sec.-fi. .21 do J.C. Dort .37 1.5 31 June 16 do do 27 H. J. Tompkins 1.4 July 12 J.C. Dort E.Tompkins 2.53 2.68 3.05 3.85 3.10 2.95 4.90 3.80 3.22 3.32 3.15 2.90 2.88 2.76 2.71 2.67 2.66 2.68 2.30 2.20 2.20 2.18 2.4 Aug. 12 Sept. 4 Oct. 11 Dec. 16 30 H. J. Tompkins C. W. Sopp 3.3 J.C. Dort F. C. Ebert 7.1 do do do J.C. Dort ""l.bi 1.80 1.94 L64 L74 2.27 1.83 1.80 1.74 1.74 1.72 1.66 1.19 1.15 1.20 1.18 .82 .78 do do C. W. Sopp .. . . 31 9.7 6 9 1917. Jan. 20 do H.J.Tompkins. C. W. Sopp 302 25 17 Feb. 15 H.J.Tompkins J.C. Dort F. C. Ebert . . 15 20 do do C. W. Sopp 12 22 24 do H.J.Tompkins do J.C. Dort 6.8 6.8 28 Mar. 7 H. J. Tompkins C. W. Sopp 4.1 4 12 17 Apr. 5 19 do H.J. Tompkins J. C. Dort do do do do do H. J. Tompkins Ellsworth and Ebert. 3.8 2.9 2.8 7 26 July 12 29 H.J.Tompkins do do do do .14 .19 «.l 424 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of San Dimas Creek near San Dimas, Calif., for 19,16-1918.^ Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1916-17. 8.5 8.5 11 10 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 9 10 8.5 9 24 20 15 14 12 14 13 11 7 7 6.5 6.5 6.5 6 6 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 4.9 4.9 4.9 4.9 4.9 13 8.5 7 13 18 58 31 24 36 29 25 19 16 13 11 11 11 11 11 11 12 11 11 11 11 11 10 10 9 8.5 8.5 7.5 7.5 7 7 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 o6.5 6.5 6.5 6 6 6 6 6 8 7 6.5 6 5.5 5 5.5 5.5 6 4.6 5 6 8 a7.5 7 6 5.5 5.5 5.5 4.6 4.3 4.3 5.5 6.5 6.5 5.5 4.3 4.3 4.8 4.8 4.8 4.6 13 12 8.5 7 6 7.5 8 8 7.5 5.5 5.5 5.5 6.5 6.5 5 4.8 4.6 4.6 4.6 4.6 4.5 4.0 3.7 a3.7 a3.7 3.7 3.5 3.2 2.9 2.4 1.8 1.6 1.5 1.5 1.5 1.5 1.6 1.7 1.7 1.7 1.7 1.6 1.5 1.4 l!l i.o .9 .8 .8 .8 a. 8 a. 8 a. 8 a. 8 a. 8 a. 8 a. 8 a. 8 .8 .8 .7 .7 0.7 .7 .7 .7 .6 .6 .6 .6 .5 .4 a. 4 0.4 .4 .4 .4 .4 .4 .3 .3 .3 .3 .3 .3 .3 0.3 0.3 a. 3 C.3 a.3 a. 3 a.3 0.3 2 3 3 5 4.2 3.7 3.7 3.6 3.6 3.6 3.6 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.7 250 73 23 20 15 8.6 8.5 8.5 3 4 .3 5 .3 6 .3 7 .3 8... .3 9 .3 10 .4 11 .4 12... ,4 13 .3 14 ' .3 15 a.3 16 • 0.3 17 0.2 18 .2 19 0.2 20 a. 2 21 a.3 22 0.3 23 0.3 24 0.3 25. . a.3 26 a.3 27 c.3 28 0.2 29.. 0.2 30 a. 2 31 . .. a No gage-height record; discharge interpolated. 1917-18. 1 0.2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .3 .3 .3 .3 .4 .4 .4 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 .3 0.3 .3 .3 .3 .4 .9 .9 .8 .8 .8 .8 .7 .6 .6 .6 .6 .5 .6 .7 .8 .8 1.0 1.1 1.3 1.3 1.3 1.3 1.3 1.3 1.2 1.3 1.3 1.4 1.4 1.4 1.4 1.5 1.4 1.4 1.5 1.5 1.5 1.6 1.7 1.7 1.7 1.7 1.6 1.5 1.5 1:? 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.8 1.8 1.8 1.8 1.9 1.8 1.6 1.5 1.4 1.6 1.8 2.1 2.4 1.9 1.8 1.7 1.6 1.6 1.7 1.7 1.7 1.7 1.6 1.5 1.5 1.9 1.8 1.7 1.7 1.4 1.4 1.5 1.5 1.5 1.5 1.9 3.5. 2.5 2.6 7 29 12 6 8 10 7.5 5.5 4.0 3.8 3.4 3.1 3.4 9.5 142 54 31 37 104 80 50 31 24 25 22 18 20 18 14 12 11 11 9.5 9 8.5 8 7.5 6.5 6.5 7 6.5 6.5 5.5 5 4.7 4.4 4.3 4.4 4.8 4.9 6 5.5 5 4.8 4.6 4.1 3.8 3.8 3.8 4.0 4.2 4.7 5 5.5 5.5 4.8 4.0 3.7 3.5 3.1 2.9 3.0 3.4 3.5 3.5 3.8 3.8 3.6 3.4 3.2 2.7 2.6 2.8 2.9 2.9 2.7 2.7 2.8 2.8 2.8 2.7 2.6 2,6 2.6 2.6 3.1 3.5 3.4 3.2 3.0 2.8 2.7 2.5 2.3 2.1 1.9 1.8 1,7 1.7 1.8 1.7 1.6 1.5 1.5 1.5 1.4 1.3 1.3 1.2 1.1 1.0 1.0 .9 .8 .8 .7 .7 .7 .7 0.6 .6 .6 .6 .5 .5 .5 .5 .4 .4 .4 .4 .3 .3 .3 .3 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 0.2 .2 .2 .2 .2 .2 .2 .2- .2 .2 .2 .2 .2 .2 .3 .3 .4 .3 .2 .2 .2 -.1 .2 .2 .2 .2 .1 .1 .1 .1 ai 2 3 4 6 7 8 9 10. 11 12 . . 13 14 .2 15. . . .2 16 .2 17. . .. .2 18 .2 19 ,1 20 .2 21 .3 22 .3 23 .3 24 .4 25 .4 26 .5 27 .5 28 .6 29.. .6 30 .6 31 Note.— No gage-height record Oct. 1-10, 14-21, 28-31; Nov. 1, 2, 11; Jan. 18-25; May 9-10, 19-21, June 1-7, 16-31; July 1-18; Aug. 3, 4, 25-30; and Sept. 15-17, 29-30— discharge estimated. SAN GABRIEL RIVER BASIN. 425 Monthly discharge of San Dimas Creek near San Dimas, Calif., for 1916-1918. Month. Discharge in second- feet. Run-off (total in acre- feet). Month. Discharge in second- feet. Run-ofl (total in Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1916-17. December, 3-31 January February March 250 24 58 16 8 13 5 1.4 !4 3.5 6.5 4.9 6.5 4.6 4.3 1.4 .7 .3 .2 16.7 10.2 13.1 9.32 6.24 6.27 2.86 .99 .42 .29 961 627 728 573 371 386 170 60.9 25.8 17.3 1917-18. October November December January February March 0.4 1.3 1.7 2.4 29 142 7 3.8 3.0 .6 .4 .6 0.2 .3 1.3 1.4 1.4 3.1 3.7 2.6 .7 .2 .1 .1 .28 .81 1.57 1.74 4.32 25.4 4.93 3.05 1.52 .33 .20 .24 17.2 48.2 96.5 107 April... 240 May . . . 1 560 April 293 July... May... 188 August... September 90.4 July 20.3 August September The year.. 12.3 14.3 The period. 3,920 142 .1 3.71 2,690 FISH CREEK NEAR DUARTE, CALIF. Location.— In SW. I SW. I sec. 15, T. 1 N., R. 10 W., about thi-ee-fourths mile above mouth of canyon and 4 miles northeast of Duarte, Los Angeles County. Drainage area. — 6.5 square miles (measured on topographic map). Elevation. — ^About 1,000 feet above sea level. Records AVAILABLE. —July 23 'to September 30, 1916, and July 28, 1917 to September 30, 1918. GAGE.^Gurley graph water-stage recorder, installed July 28, 1917, on left bank three- fourths mile above mouth of canyon, at same site and datum as vertical staff. (See PI. XIII, B, p. 422.) Discharge measurements. — Made by wading near gage. Channel and control.— Gravel and boulders; apparently permanent. Both banks are high and not subject to overflow. A concrete control has been built at an out- crop of bedrock a short distance below gage. Extremes of discharge. — 1916-1918: Maximum stage recorded 4.50 feet at 4 p. m. March 10, 1918 (discharge, 330 second feet); minimum stage, 1.59 feet September 12 and 13, 1918 (discharge, 0.1 second-foot.). Diversions. — None above. Regulation.— None. Accuracy.— Stage-discharge relation not permanent on account of changes in control. Rating curves fairly well defined. Staff gage read to hundredths once daily in 1916. Daily discharge ascertained by appljdng to the rating table mean daily gage height obtained by inspecting recorder graph or from staff records. Records good. 426 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Discharge measurements of Fish Creek near Duarte, Calif., for 1916-1918. Date. Made by- Gage height. Dis- charge. Date. Made by- Gage height. Dis- charge. 1916. Apr. 12 24 May 2 19 H. J. Tompkins Feet. sec,,. 7.2 6.2 6.4 2.7 3.0 1.6 1.8 2.4 4.4 2.8 21 8.6 5.6 3.7 3.2 2.3 .3 .35 .65 1917. Dec. 19 1918. Jan. 18 Feb. 7 21 23 25 Mar. 6 7 20 21 29 30 Apr. 4 18 May 3 21 June 7 21 July 13 27 E. Tompkins Feet. 1.78 1.82 1.86 2.71 2.37 2.48 2.28 4.00 2.52 2.48 2.26 2.22 2.22 2.11 2.03 2.00 1.92 1.S2 1.72 1.70 Sec.-ft. 0.5 do do J. C. Dort '.'.'.'.'.'/.'. Ebert and Sopp H. J. Tompkins F.C. Ebert .65 June 10 28 do H.J.Tompkins "'b'.hi' .86 .80 .89 1.02 .90 1.70 1.18 1.06 .94 .96 .88 .53 1.74 1.82 .75 21 July 14 J. C. Dort do H.J. Tompkins C. W. Sopp 8.4 Oct. 25 H. J. Tompkins 14 Dec. 5 do H. J. Tompkins. 6.9 1917. do F.C. Ebert 231 18 Jan. 9 C W. Sopp . . . 15 Feb. 15 do.... do do do do do do do E. Tompkins H. J. Tompkins.. F.C. Ebert 7.2 28 Mar. 15 H.J. Tompkins C. W. Sopp 7.0 5.3 Apr. 17 25 do do . .. 4.0 2.3 May 26 June 11 do ... do 1.9 1.4 Julj 28 Oct. 15 Nov. 8 H. J. Tompkins do do .42 .16 .15 Daily discharge, in second-feet, of Fish Creek near Duarte, Calif., for 1916-1918. Day. July. Aug. Sept. Day. July. Aug. Sept. Day. July. Aug. Sept. 1916. 1 a 1.0 .9 .9 a 1.0 1.2 1.1 1.0 o 1.0 1.0 1.2 1.2 1.1 1.1 1.2 a 1.3 1.4 1.4 a 1.4 1.5 1.4 a 0.8 .9 .9 .9 «1.0 1.0 1.0 a 1.0 .9 1.0 1.0 a .9 .8 .8 a .8 .8 .8 .9 a .8 .8 1916. 21 1.3 a 1.2 1.0 .9 a .9 .9 .9 .9 a .9 .9 .8 .3 .3 .3 .2 .2 .2 .2 .2 .2 .2 0.9 a 1.0 1.2 1.2 1.1 a 1.2 1.2 .9 6 .8 6 1.5 .2 .2 .2 .2 .2 .2 .2 .2 .2 '.2 ^ 1917. 11 0.3 .3 .3 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 0.2 2 22 12 .2 3 23 1.6 a 1.6 a 1.5 1.5 a 1.4 1.3 1.2 1.2 1.1 13 2 4 24 14 .2 5 25 15 .2 6 26 „. 16 . .2 7 27 17 .2 8 28 18 .2 9 29 . 19 .2 10 30 20 .2 31 21 11 1917. 1 .2 12 22 .2 13 23 .2 14 2 24 .2 15 3 25 .2 4 26 16 5 .2 17 6 27 .2 18 28 0.3 .3 .3. .3. .2 19 7 29 . -. .2 20 8. 30 .2 9 31 10 a No gage-height record; discharge interpolated. b No gage-height record; discharge estimated from rainfall records; SAI^ GABRIEL RIVER BASIN. 427 Daily discharge, in second-feet, of Fish Creek near Duarte, Calif., for 1916-1918- Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1917-18. 1 2. . 0.2 .2 .2 .2 .2 .2 .2 .2 .3 .3 .3 .3 .3 .3 .3 .4 .4 .4 .2 .2 .1 .1 .1 .1 .1 .1 .2 .2 .3 .3 .3 0.2 .1 .1 .1 .2 1.3 .8 .6 .6 .6 .5 .5 .5 .5 .5 .5 !5 .5 .5 .5 .5 .5 .5 .6 .7 .7 .6 .6 .6 0.6 .6 .7 .7 .7 .6 .6 .6 .6 •6 .6 .6 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 .5 0.4 .5 ^5 .6 .7 .7 .6 .5 .6 .6 .6 .6 .6 .6 .5 .5 .5 .5 .5 .6 .7 .7 .6 .6 .6 .6 0.6 .6 .6 .6 .6 .6 1.0 .9 .8 .7 " .6 .6 .6 .7 .7 .7 1.3 2.9 1.3 2.3 10 85 13 6.5 17 11 7 5.5 4.1 3.2 3.0 2.6 3.1 7.5 151 43 20 84 193 137 98 47 34 23 19 16 24 18 16 12 12 10 9.5 9 8.5 8 7.5 7 6.5 6.5 6.5 6.5 6.5 6 6 5.5 5.5 5 4.9 4.7 4.5 4.3 4.1 3.8 3.6 3.4 3.4 3.2 3.2 3.2 3.2 3.4 3.4 3.2 3.4 3.1 3.0 2.8 2.6 2.4 2.0 2.0 1.9 2.2 2.4 2.2 2.2 2.2 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.9 1.9 1.9 1.9 1.7 1.8 1.8 1.8 1.9 1.9 1.9 1.8 1.7 1.7 1.6 1.4 1.5 1.4 1.3 1.1 1.1 1.0 1.0 1.0 .8 .7 .7 .7 .7 .6 .5 .5 .6 .7 .5 .5 .6 .7 .7 .5 .5 .5 .5 0.6 .6 .3 .3 .2 .2 .2 .2 .2 .2 .1 .2 .3 .4 .4 .3 .2 .1 .1 .1 .1 .1 .1 .1 .1 .1 .2 !l .1 0.1 .2 .2 .2 .2 .1 0.1 3. 4.. '. 5. . 6 7 . 8 9.. . 10 11 12 13 14 15 16 17 18 .2 19 .2 20 .3 21 .3 22 .2 23 .2 24 .2 25 .2 26 .1 27 .2 28 .3 29 .2 30 .2 31 . Note. — No gage-height record Oct. 4-14 and Dec. 9; discharge interpolated. Indirect method for shifting control used Feb. 21. Monthly discharge of Fish Creek near Duarte, Calif, for 1916-1918. « Discharge in second-feet. Run-off (total in acre- feet). Month. Discharge in second-feet. Run-oflf (total Month. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. in acre- feet). 1916. July 23-31 1.6 1.5 1.5 1.1 .8 .8 1.38 1.09 .96 25 67 57 1917-18. October 0.4 1.3 .7 .7 85 193 6.5 2.4 1.7 .6 .2 .3 0.1 .1 .4 .4 .6 2.6 2.6 1.7 .5 .1 .1 0.23 .51 .53 .55 6.20 33.4 4.28 1.98 .85 .21 .11 .15 14.1 August . . November "December 30.3 September 32.6 33.8 344 The period. 149 February March 2,050 255 1917. 0.3 .3 .2 0.3 .2 .2 0.30 .21 .20 2.4 12.9 11.9 April . July 28-31 May :::::::::::: 122 50.6 September July 12.9 6.8 8.9 The period. 27.2 September The year 193 '' 4.10 2,960 SAWPIT CREEK NEAR MOMHOVIA, CALIF. Location. — In SE. J NW. i sec. 13, T. 1 N., R. 11 W., at highway bridge just below junction of two main branches, about 2 miles north of Monrovia, Los Angeles County. Drainage area. — 5.3 square miles (measured on topographic map). • Elevation. — About 1,050 feet above sea level. Records available. — November 8, 1916, to September 30, 1918. 428 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Gage. — Gurley graph water-stage recorder, with concrete well and shelter, on Ifeft bank at east end of highway bridge. (See PI. XIV, A.) Discharge measurements. — Made from bridge or by wading near gage. Channel and control. — Coarse gravel and boulders; apparently permanent. Channel is straight for 25 feet above gage and curved below; both banks are high. A concrete boulder dam was built across channel just below gage for an artificial control. Lowest point in this control is at elevation 0.70 foot on gage. Extremes of discharge. — 19] 6-1918: Maximum stage recorded by water-stage recorder, 2.65 feet at midnight March 10-11, 1918 (discharge from extension of rating curve, 256 second-feet) ; stream dry for several months each year. Diversions. — Part of the water supply for Monrovia is obtained from the two branches of Sawpit Creek above gage. (See record for Monrovia pipe line near Monrovia, Calif., p. 43.) Regulation. — None. Accuracy. — Stage-discharge relation not permanent. A fairly well-defined rating curve, averaging all measurements obtained at this station, was used throughout 1918. The curve for 1917 was fairly well defined. Daily discharge ascertained by applying to the rating table mean daily gage heights determined by inspecting recorder graph, except for December 24, 1916, and March 7, 10, and 11, 1918, when hourly discharge was averaged. Records for 1917 fair; for 1918 good. Cooperation. — City of Monrovia furnished observer for water-stage recorder. Discharge measurements of Savrpit Creek near Monrovia, Calif., for 1916-1918. Made by- Gage height. Dis- charge. j Date. Feet. Sec.-ft. 1918. 1.05 2.6 Feb. 25 Mar. 11 15 1.16 6.4 20 .96 1.4 29 1.05 3.4 Apr. 4 1.75 46 1.75 45 1.32 9.5 1.08 3.6 1.03 2.3 Made by— Gage height. Dis- charge. 1916. Dec. 30 1917. Jan. 20 Feb. 15 20 22 22 24 Mar. 15 .28 J. C. Dort J. C. Dort H. J. Tompkins. J. C. Dort ....do ....do ....do H. J. Tompkins. do F.C. Ebert.. E. Tompkins C. W. Sopp. . F.C. Ebert.. do C. W. Sopp.. Feet. 1.02 1.74 1.20 1.20 1.05 1.07 Sec.-ft. 1.5 54 7.0 5.6 1.6 2.3 Daily discharge, in secondfeet, of Sawpit Creek near Monrovia, Calif., for 1916-1918. Day. Nov. Dec. Jan. Feb. Mar. Apr. Day. Nov. Dec. Jan. Feb. Mar. Apr. 1916-17. 1 0.9 1.1 3 2 3.0 2.7 2.3 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 3.0 3.4 40 3.4 3.0 2.9 2.9 2.9 2.9 2.7 2.5 2.7 2.5 2.5 2.9 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.3 1.5 1.5 1.5 1.6 1.6 1.6 1.5 8.5 8 6.5 6 _ 4.8 4.0 3.6 4.0 4.2 4.0 4.0 4.0 3.8 3.6 2.1 2.1 2.0 1.5 .8 .2 .0 .0 .0 .0 .0 .0 .0 .0 .0 1916-17. 16 1.3 1.1 .9 1.1 1.0 .8 .8 .9 .9 .9 1.0 1.0 .9 .9 .9 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.5 74 14 6.5 4.5 4.0 4.0 3.0 3.0 3.0 2.9 3.2 5 5.5 4.5 4.0 3.8 3.6 3.4 3.2 2.9 2.9 2.7 2.7 2.7 1.7 2.5 2.3 2.3 3.8 14 36 17 12 17 14 10 9.5 3.4 3.2 3.2 3.0 3.0 3.0 3.0 2.9 2.9 2.9 2.9 2.7 2.7 2.5 2.3 2.1 .0 2 17 1.4 3 18 2.1 4 19 2.1 5 20 .7 6 :... 21 7 22 8 2.1 2.1 2.1 2.1 2.1 2.1 2.1 1.6 23 9...:.:. . 24 10 25 11 26. 12 27 13 28 14 29 15 30 31 Note.— No flow Apr. 21 to Sept. 30. SA^ GABRIEL RIVER BASIN. 429 Daily discharge ^ in second-feet, of Sawpit Creek near Monrovia, Calif ., for 1916-1918, Day. Feb. Mar. Apr. Day. Feb. Mar. Apr. Day. Feb. Mar. Apr. 1918. 1 1.4 1.4 1.4 1.4 1.4 2.1 49 14 7 22 3.2 3.4 3.2 2.9 2.5 2.3 2.3 2.1 1.1 .4 1918. 1] 88 34 21 12 9 8.5 8.5 8 8 6.5 .4 .4 1.8 2.0 1.8 .8 .05 .03 .04 1918. 21. 5 4.6 3.7 3.4 3.4 3.2 3.0 2.9 2.5 2.7 2.9 2. . . . 12 22 8.2 2.5 2.1 2.9 1.5 1.4 1.6 3. 13 23. 4 14. 24. 5 15 25 6 16. 26 . 7 17 27 8. - . - 18 28 9 19 29 10 20. 30. 31 Note.— No flow Oct. 1 to Feb. 21 and Apr. 20 to Sept. 30. Monthly discharge of Sawpit Creek near Monrovia, Calif, for 1916-1918. Discharge in second-feet. Run-off (total in acre- feet). Month. Discharge in second-feet. Run-off (total Month. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean . in aere- feet). 1916-17. November 8-30.. December 2.1 74 5.5 36 8.5 2.1 0.8 .9 2.5 1.5 2.1 .0 1.33 5.24 3.23 6.17 3.88 .50 60.7 322 199 313 239 29.8 1,190 1917-18. February March 8.2 88 3.4 .00 1.4 .00 .721 11.0 1.02 40.0 676 January April 60 7 February March The year .... 88 .00 LOS 777 April The period . . Note.— No flow May to December, 1917, January, 1918, and May to September, 1918. Record for 1917-18 represents full year. Combined daily discharge, in second-feet, of Sawpit Creek and Monrovia pipe line near Monrovia, Calif., for 1916-1918. Day. 9.. 10.. 11.. 12.. 13.. 14.. 15.. 18.. 19.. 20.. 21.. 22.. 23.. 24.. 25.. 30-. 31.. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.5 3.5 3.3 3.1 3.3 3.2 3.0 3.0 3.1 3.1 3.1 3.2 3.2 3.1 3.1 3.3 5.5 4.7 4.4 4.0 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8 4.2 76 16 8 6 5.5 5.5 4.5 4.5 4.4 4.4 4.4 4.4 4.2 4.0 4.2 4.0 4.0 4.4 4.5 4.4 4.7 6.5 7 6 5.5 5.5 5 5 4.8 4.5 4.4 4.2 4.2 4.2 4.0 4.0 4.0 4.0 4.0 4.0 4.0 4.0 3.7 3.8 3.8 3.8 3.6 3.5 4.0 3.8 3.8 5.5 16 38 19 14 19 16 12 11 7.5 7 6.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5 4.9 4.9 4.7 4.7 4.7 4.7 4.6 4.6 4.6 4.6 4.4 4.4 4.2 4.3 4.5 4.5 4.7 5 4.9 4.5 3.8 3.4 3.6 3.9 3.7 3.4 3.4 3.4 3.4 3.4 4.0 4.2 4.2 4.2 3.3 3.1 3.7 3.9 3.6 3.4 3.7 4.0 4.6 4.0 3.7 3.4 3.4 3.4 3.4 3.1 3.1 3.1 3.4 3.6 3.4 3.1 3.1 3.1 3.1 3.0 2.8 3.1 3.4 3.4 3.4 3.4 3.4 3.4 3.4 2.7 2.6 2.7 2.7 2.8 3.1 3.1 3.1 3.1 3.1 3.0 2.8 2.8 2.8 2.8 2.8 2.7 2.6 2.5 2.5 2.4 2.4 2.4 2.2 2.4 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.1 2.1 2.1 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.9 1.8 1.8 1.8 1.8 l.S 1.8 1.8 1.7 1.7 1.7 1.7 1.7 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.5 1.5 1.5 1.5 1.5 1.5 1.6 1.6 1.5 1.5 1.5 430 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Combined ( ' discharge, in second-feet, of Sawpit Creek and Monrovia pipe line near Monrovia, Calif., for 1916-1918 — Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1917-18. 1 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.5 1.6 1.6 1.7 1.7 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1,9 1.7 1.7 1.6 1.6 1.5 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.5 1.5 1.5 1.5 1.9 1.6 1.8 1.9 10 4.0 3.4 5 3.7 3.0 3.2 3.0 3.0 3.0 2.9 2.9 4.0 51 15 8 23 89 35 22 13 11 12 12 11 11 8 6.5 6.5 6 6.5 6.5 6 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 4.9 4.5 4.4 4.7 4.5 3.9 3.7 3.7 3,7 4.4 4.1 3.9 3.4 3.0 3.0 2.8 2.8 2.8 2.8 2.8 3.3 3.1 3.1 3.1 2.8 2.8 2.8 2.7 2.7 2.7 2.7 2.6 2.6 2.6 2.6 2.6 2.6 2.6 2.4 2.4 2.4 2.4 2.7 2.6 2.5 2.4 2.4 2.4 2.4 2.4 2.4 2.1 2.1 2.1 2.1 2.4 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.0 2.0 1.9 1.9 1.9 2.1 2.1 \l 1.8 1.8 1.8 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.6 1.6 1.6 1.7 1.6 1.6 1.5 1.5 1.5 1.5 1.5 1.5 1.4 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.3 1.3 1.3 1.3 1.2 1.2 1.2 1.2 1.2 1.2 1.2 2... 1 2 3 1.2 4 1.2 5 1.2 6 1.2 7 1.2 8 1.2 9 1.2 10 1.2 11 1.2 12 1.2 1.2 13 14 1.5 15 1.4 16 1.4 17 1.4 18 1.3 19 1.3 20 1.3 21 1.3 22 1.3 23 1.3 24 1.3 25 1.3 26 1.3 27... . 1.5 28 1.4 29... . . 1.3 30 1.3 31 Note. — See pages 431, 432 for daily discharge of Monrovia pipe line. Combined monthly discharge of Sawpit Creeh and Monrovia pipe ^ Calif., for 1916-1918. '■ near Monrovia, 1916-17, November. . . December... January February March A pril May June July August September... The period Discharge in second- feet. Maxi- mum. 3.8 76 7 38 10 5 3.9 3.1 2.0 1.8 . 1.7 Mini- mum. 3.0 3.1 4.0 3.5 4.2 3.1 2.6 2.1 1.8 1.7 3.37 6.97 4.74 7.99 5.57 3.89 3.21 2.54 1.92 1.73 1.57 Run-off (total in acre- feet). 154 429 291 444 342 231 197 151 118 106 2,560 1917-18. October November. . . December... January February March April May June July August September... The year Discharge in second- feet. Maxi- mum. 5.5 2.7 2.1 1.7 1.4 1.5 Mini- mum. 1.4 1.5 1.5 1.5 1.5 2.9 2.8 2.1 1.6 1.4 1.2 1.2 Run-off (total in acre- feet). 1.57 1.51 2.37 13.1 3.71 2.45 1.85 1.44 1.30 1.28 91.0 95.2 96.5 92.8 132 805 221 151 110 88.5 79.9 76.2 MONROVIA PIPE LINE NEAR MONROVIA, CALIF. Location. — Near southeast corner sec. 14, T. 1 N., R. 11 W., 300 feet above settling reservoir at mouth of Sawpit Canyon, and 1^ miles north of Monrovia, Los Angeles County. Records available. — May 18, 1916, to September 30, 1918. Gage. — Vertical staff in weir box. Discharge. — ^Measured by two rectangular weirs with end contractions. Left weir, 2.25 feet long; right weir, 2.26 feet long. Crest of left weir is at zero gage height; crest of right weir is 0.02 foot lower at one end. Weir table has been checked by current-meter measurements made at mouth of intake pipe in weir box. SAN GABRIEL RIVER BASHST. 431 Extremes of discharge. — 1916-1918: Maximum stage recorded, 0.49 foot May 18-19, 1916 (discharge, 5.0 second-feet); minimum stage, 0.18 foot August 26 to Septem- ber 13, 1918 (discharge, l,.l second-feet). Accuracy. — Stage-discharge relation considered permanent since conditions of back- water for any stage are probably constant. Gage read to hundredths twice daily. Daily discharge ascertained by applying mean daily gage height to rating table. Records excellent. Cooperation. — Gage-height record furnished by city of Monrovia. The Monrovia pipe line furnishes part of the water supply of Monrovia. It obtains its water from two branches of Sav/pit Creek. Most of this water is collected by tun- nels driA^en into the sides of the canyon. The following discharge measurement was made by J. C. Dort: May 19, 1916: Gage height, 0.49 foot; discharge, 5.1 second-feet. Daily of Monrovia pipe line near Monrovia, Calif .,Jor 1916-1918. Day. 12.. 13.. 14.. 15.. May. June. July. Aug. Sept. 4.4 4.4 4.4 4.2 4.2 4.2 4.2 4.2 4.2 4.2 3.9 3.9 3.9 3.6 3.6 3.6 3.6 3.6 3.4 3.4 3.4 3.3 3.3 3.3 3.3 3.3 3.3 3.3 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.7 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.4 2.4 Day. May. June. July. Aug. Sept. 5.0 a 5. 4.8 4.7 4.7 4.7 4.7 4.7 4.7 4.6 4.4 4.4 4.4 4.4 3.9 3.9 3.9 3.9 3.9 4.0 3.9 3.9 3.9 3.6 3.6 3.6 3.6 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Day. 7.. 8.. 9.. 10.. 11.. 12.. 13.. 14.. 15-. 18.. 19.. 20.. 23.. 24.. 25-. 27.. 28.. 29.. 30.. 31.. 2.4 1.8 1.8 1.9 1.9 1.9 1.9 1.9 1.9 1.8 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.8 1.9 1.9 1.8 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.9 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2. 2.2 2.2 2.2 2.2 2.1 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7. 1.7 1.7 1.7 1.7 1.7 1.7 1.7 2.1 1.5 1.5 1.5 1.5 1.6 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.7 2.1 2.2 2.2 2.2 2.2 2.2 2.1 1.7 1.7 1.7 1.7 1.7 1.7 1.7 2.0 2.0 1.7 1.7 1.7 1.7 1.7 1.7. 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 2.0 2.4 Apr. 2.4 2.6 3.0 3.4 3.7 3.4 3.6 3.9 3.7 3.4 3.4 3.4 3.4 3.4 4.0 2.8 2.1 2.1 2.6 3.1 3.7 3.9 3.6 3.4 3.7 4.0 4.6 4.0 3.7 May. June. July. 3.4 3.1 2.0 3.4 3.1 2.0 3.4 3.1 2.0 3.4 3.1 2.0 3.1 3.1 2.0 3.1 3.0 2.0 3.1 2.8 2.0 3.4 2.8 2.0 3.6 2.8 2.0 3.4 2.8 2.0 3.1 2.8 2.0 3.1 2.7 1.9 3.1 2.6 1.9 3.1 2.5 1.9 3.0 2.5 1.9 2.8 2.4 1.9 3.1 2.4 1.9 3.4 2.4 1.9 3.9 2.2 1.9 3.7 2.4 1.9 3.4 2.2 1.9 3.4 2.2 1.9 3.4 2.2 1.9 3.4 2.2 1.9 3.4 2.2 1.9 3.4 2.2 1.9 2.7 2.2 1.8 2.6 2.1 1.8 2.7 2.1 1.8 2.7 2.1 1.8 2.8 1.8 a Gage not read; discharge estimated. 6 Gage not read; discharge interpolated. 432 SURFACE WATER OF PACIFIC SLOPE j SOUTHERN CALIFORNIA. Daily , in second-feet, of Monrovia pipe line near Monrovia, Calif ., for 1916- 1918— GoJitiBued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1917-18. 1 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.5 1.6 1.6 1.7 1.7 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.9 1.7 1.7 1.6 1.6 1.5 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.6 1.6 1.6 \:l 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.5 1.5 1.5 1.5 1.9 1.6 1.8 1.9 2.1 1.5 1.3 2.1 2.2 1.6 1.6 1.6 1.6 1.6 1.5 1.5 1.9 1.7 1.3 1.2 1.3 1.3 1.3 1.2 1.3 2.4 3.3 3.1 3.1 3.0 1.6 1,7 1.7 2.4 3.1 3.1 2.6 2.4 2.6 2.8 2.8 2.8 2.5 2.1 2.1 2.0 2.0 2.1 2.4 2.4 2.8 3.3 3.3 3.3 2.6 2.1 2.1 2.6 3.0 3.0 2.8 2.8 2.8 2.8 2.8 3.3 3.1 3.1 3.1 2.8 2.8 2.8 2.7 2.7 2.7 2.7 2.6 2.6 2.6 2.6 2.6 2.6 2.6 2.4 2.4 2.4 2.4 2.7 2.6 2.5 2.4 2.4 2.4 2.4 2.4 2.4 2.1 2.1 2.1 2.1 2.4 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.0 2.0 1.9 1.9 1.9 2.1 2.1 1.9 1.9 1.8 1.8 1.8 i!6 1.6 1.6 1.7 1.6 1.6 1.5 1.5 1.5 1.5 1.5 1.5 1.4 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.3 1.3 1.3 1.3 1.2 1.2 1.2 1.2 1.2 1.2 1.2 2 1.2 3 1 2 4 1.2 5 1.2 6 1.2 7 1.2 8 1.2 9 1.2 10 1.2 11 1.2 12 1.2 13 1.2 14 1.5 15 1.4 16.. 1.4 17 1.4 18.. 19 1.3 1.3 20 1.3 21 . ... . ... 1.3 22 1.3 23 1.3 24.. 1.3 25 1.3 26 1.3 27 1.5 28 1 4 29 1.3 30 1.3 31 Monthly discharge of Monrovia pipe line near Monrovia. Calif., for 1916-1918. Month. Discharge in second- feet. Rim-ofi (total in acre- feet). Month. Discharge in second- feet. Run-off (totalin Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. acre- feet). 1916. May 18-31 June 5.0 4.4 3.6 2.8 2.5 4.4 3.6 3.0 2.5 2.4 4.66 3.98 3.27 2.69 2.47 129 237 201 165 147 1916-17. August September The year. . 1917-18. October November December January February March . 1.8 1.7 1.7 1.5 1.73 1.57 106 93.4 July... . 4.6 1.5 2.08 August 1,510 September 1.7 1.9 1.6 1.6 2.2 3.3 3.3 2.7 2.1 1.7 1.4 1.5 1.4 1.5 1.5 1.5 1.3 1.2 2.0 2.1 1.6 1.4 1.2 1.2 1.48 1.60 1.57 1.51 1.66 2.09 2.69 2.45 1.85 1.44 1.30 1.28 The period 879 91.0 95.2 1916-17. October November December 3.4 2.2 2.2 1.7 2.2 2.4 4.6 3.9 3.1 2.0 1.7 1.7 1.5 1.5 1.5 1.7 2.1 2.6 2.1 1.8 1.91 1.98 1.72 1..54 1.76 1.75 3.39 3.21 2.54 1.92 117 118 106 94.7 97.7 108 202 197 151 118 96.5 92.8 92.2 129 April 160 January mSv 151 February March June... 110 July August September The y^ar. . May 79.9 76.2 July 3.3 1.2 1.74 1,260 SAN GABRIEL RIVER BASIN. MISCELLANEOUS MEASUREMENTS. 433 Measurements of stream flow in the San Gabriel River basin at points other than those at which gaging stations have been main- tained are recorded in the following table : Miscellaneous discharge measurements in San Gabriel River drainage basin for 1896-1917, Dale. Stream. Tributary to — Locality. Dis- charge. JyfQy __ 1895 San Gabriel River do Pacific Ocean Above Iron Fork Scc.-ft. 7 7 Dec. —,1896 .do .do 7 4 Jan — 1897 do do do 2S 4 Feb — 1897 do .... . . do ... do 42 Mar. —,1897 do do do Apr. —,1897 May -1897 June —,1897 do . . do do 27.9 24 7 do . . do . . • - - - do do ... do do 25 4 July —,1897 Aug. -, 1897 Sept. — , 1897 Apr. —1900 Aug. 23,1898 Aug. 22,1912 Sept. 1,1913 June 17,1896 .do do do 17.8 do do do 16 4 do .do .do 16.5 .do do do 5 76 .....do do do do Above junction with West Fork. Just above junction with West Fork of San Gabriel River, inNE.i sec. 29, T. 2N., R. 9W. Diverting dam of Pacific Light & Power Corporation. Mouth of Vineland tunnel 7.11 21 '^ do do .do 55 do 1 54 Do do 2 1] Apr. 29,1897 Do do do Mouth of Vineland tunnel.. . - - Same; shaft No. 2 Mouth of Vineland tunnel, at head of fiume, between shafts Nos. 3 and 4. Same; right fork, above shaft No. 4. Mouth of Vineland tunnel Azusa irrigators' development tunnel. Same place: river being divert- ed through power company 's conduit. Irrigators' development tun- nel, pumped; additional. Junction of East and West forks. Head works of San Gabriel Power Co. 2 23 do do 2 11 Do do do 2 13 Do do do 1.07 1.88 3.99 .22 .3 9.87 8.42 May 24, 1897 June 17,1896 do do do .-do Aug. 24,1898 Do-- do do do Aug. 23,1898 Do- do do do do July 3, 1898 do do Do do do Channel No. 2; Baldwin ranch house road. Channel No. 3; Campers sta- tion. El Monte Bridge 8.79 3.36 50 Do. do do Apr. 15,1903 -....do do -----do do Apr. 26,1903 do 2 29 May 26,1903 do .do do 47 Apr. 13,1905 do do do Apr. 15,1903 May 26,1903 do do -....do do Lexington wash at El Monte. . Total at head of Lexington wash. Upper road crossing, Duarte to Azusa. Opposite Alamitos 3 66 264 311 Apr. 14,1903 Apr. 23.1903 do do do.... do .do Apr. 24,1903 Do do Southern California Ry. at Rivera. Southern California Ry. at Studebaker. Whittier road crossing do 365 364 106 361 do do Dec. 5, 1897 do do Apr. 25,1903 do do ^ Do- do do --- . Road crossing east of Durfee's ranch. Mouth 264 5 6 Nov. -, 1896 Iron Fork of San Gab- riel River. ^ do I San Gabriel River do Dec. —,1896 do 3 Jan. —1897 .....do -....do do 10 1 Feb. —,1897 .....do do do 18 3 Mar. —1897 .....do do do 18.9 142131°— 21— wsp 447- -28 434 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN" CALIFORNIA. M'scellaneous discharge measurements in San Gabriel River drainage basin for 1896-1917— Continued. Date. Stream. ) Tributary to— Locality. Dis- charge. Apr. —,1897 Iron Fork of San Gab- riel River. .do San Gabriel River . . . do Mouth Sec.-ft. 10 2 May —,1897 do 8 9 June —,1897 do do do 7 7 July —,1897 Aug. -1897 Sept. — , 1897 do do do 8.6 3.9 4 1 .do do do do do do Apr. -1900 Do. Nov — , 189fi ....do do ... do 1.69 .32 4 1 Cattle Canyon Creek-. Cold water Creek . . do do Cattle Canyon Above Coldwater Canyon. . . . . Dec. —,1895 ... do / 4 2 Jan. — , 1897 ..do do 11 3 Feb. —,1897 do do 19 1 Mar. —,1897 do .... do - 17 8 Apr. —,1897 May —,1897 do do* 11 3 do do 9 8 June —,1897 do do 8.3 July —1897 Aug. —,1897 Sept. —,1897 do do 6 5 do do 5 1 do do 5 Apr. —1900 Apr. —,1900 do .... do 1 46 West Fork of San Gabriel River. do San Gabriel River do Above Bear Creek 1.8 June 20, 1910 100 feet above jvmction with North Fork. Near mouth 8.5 Aug. 23,1898 do . . .. . do 26.7 Aug. 22,1912 do do Just above mouth in NE. \ sec. 29T.2N.,R.9W. 11 Nov. —,1896 West Fork of San Gabriel River, do 3 3 Dec — 1896 do 3 4 Jan. —,1897 do do 9 1 Feb. —,1897 do do 24.7 Mar. —,1897 do do 23.9 Apr. —,1897 May —1897 June —,1897 do do 17 3 ...do do 14.1 do do 6.3 July —,1897 do do 6.2 Aug. —,1897 do do. . 4.4 Sept. -1897 Apr. —,1900 Nov. —,1896 do do 4.5 do do 2.42 North Fork of West Fork of San Gabriel River, do do ... 3.7 Dec. —,1896 do 3 6 Jan. —,1897 do do 10.8 Feb. —,1897 ... do do 17 Mar. —,1897 do .. do 19 4 Apr. —1897 May —1897 Jime — ,1897 do do . . 13 8 ...do do 11.2 do . do 7 1 July -,1897 Aug. —,1897 Sept. -,1897 Apr. —1900 June 20,1910 Apr. 20,1903 do do 5 9 do do 4 1 do do 3 9 do do 1.43 do do 500 feet above mouth .. 7 2 San Dimas Creek do San Gabriel River do Mouth of canyon 19 May 22,1903 do ... 2.5 Sept. 14,1903 do do do Apr. 20,1903 Apr. 20,1903 May 22,1903 do... do Dalton Creek San Dimas Wash ....do Mouth of canyon 9 do do 2.7 Sept. 14,1903 do do .do May 22,1903 do do 1 mile below mouth of canyon. Southern California Ry ...... . Old dam, 1 mile above mouth of canyon, including 1.5 second-ifeet diverted by pipe line at dam. Just below old dam near mouth of canyon. 100 feet above old dam Apr. 20,1903 do do May 13,1916 do do : ; 1.6 Feb. 20,1917 do do 2 3 Feb. 28,1917 do do a. 6 Mar. 17,1917 do do 2 9 Apr. 26,1917 May 13,1916 do do 600 feet below intake of pipe line. Pipe line, below tun- nel, diverting 1.3 second- feet. Private bridge at mouth of canyon. do 01 Little Dalton Creek... do Dalton Creek 1.2 Feb. 20,1917 1 SAI^ GABRIEL RIVER BASIN. Miscellaneous discharge measurements in San Gabriel River drainage Continued. 435 vr 1896-1917— Tributary to- Locality. Dis- charge. Feb. 28,1917 Mar. 17,1917 Apr. 26,1917 Apr. 25,1903 May 31,1916 June 27,1916 Feb. 20,1917 Mar. 17,1917 Apr. 26,1917 Apr. 26,1916 May 15,1916 May 15,1916 Feb. 20,1917 17,1917 26,1917 1, Mar. Apr. July Aug. Oct. Oct. Oct. 7, 1900 3. 1903 5. 1904 6. 1905 Little Dalton Creek . do do San Jose Creek Thompson Creek. . ..do. ..do. do do Liveoak Creek . ....do ..-.ao do do., do Sawpit Creek . Sheep Creek . . do do do Dalton Creek . do do San Gabriel River.. San Jose Wash ..do. ..do. .-do. ..do., ..do. do do do do do San Gabriel River. . do do do do 100 feet above concrete check dam. do do Whittier-Puente road One-fourth mile above mouth of canyon. do Just above junction with North Fork. Mouth of canyon below forks. . do Above Morris Camp, 1.1 miles above mouth of canyon (estimated). do Mouth of canyon do Below Camp Eno do Near mouth of canyon Whittier flume crossing . do do '..-ft. 4.2 .45 .5 .7 .4 .28 .5 .26 1.33 2.46 4.6 1.4 4.6 Miscellaneous discharge measurements of diversions in San Gabriel River drainage basin for 1898-1918. Date. Name. Locality. Dis- charge. Aug. 8, 1900 Do Sec.-ft. .0 Arrovo ditch 21.1 July 25,1902 do Dam 21.7 June 15,1904 do do 20.6 July 8,1904 Aug. 31,1904 do do... 19.7 do do 18.6 Sept, 24, 1904 Oct. 15,1904 do do . 17.9 do do 20.8 Sept. 27, 1902 .do Intake 24.6 Oct. 11,1902 do do 24.2 June ^1,1904 Sept. 8,1902 Oct. 11,1903 do do 21.7 do Los Angeles & Salt Lake Ry 19.6 do. do 20.5 June 15,1904 do do 17.5 July 8, 1904 do do 17.9 Aug. 18,1904 do do 20.6 Aug. 31,1904 do do . 16 4 Sept. 24, 1904 Sept. 27, 1904 Oct. 15,1904 do do 17.0 do do 18.8 do do 18.5 June 21,1904 do do 19.4 Aug. 18,1902 Sept. 8,1902 June 21,1904 do Point of diversion 23.7 do do 23.2 .. ..do Head of flume . . 16.7 Aug. 31,1904 do do 16.2 Sept. 24,1904 do do 15.5 Oct. 10,1904 do do 18.6 Apr 25,1903 do Southern California Ry. 21 Jan. 30 1912 Azusa canal 1,000 feet below power house near Azusa 300 feet below power house near Azusa .. -do... 32 Jan. 21,1918 Jan. 30,1918 do . ..do 20 22 Jan. 30 1912 Azusa-Covina canal .... 300 feet below tailrace of power house near Azusa. Point 1 27 July 29,1902 Baldwin ditch (Rio Hondo) do 3.2 Aug. 18,1902 do 3.7 Sept. 8,1902 do *, do. .91 Sept. 27, 1902 do 'i do 2 Oct. 15,1902 . ..do do.. 1.6 June 15,1904 do do 3 July 8, 1904 do do 3.4 Aug. 31,1904 do do... . 3 Sept. 24, 1904 do do 2.8 436 SURFACE WATER OF PACIFIC SLOPE, S0UTHER:N^ CALIFORNIA. Miscellaneous discharge measurements of diversions in San Gabriel River drainage basin for 1898-1918— Continued. Date. Name. LocaUty. Dis- charge. Oct. 5, 1904 Baldwin ditch (Rio Hondo) do Point 1 ''.9 Oct. 15,1904 do July 20,1902 ...do. ... Point 3 1 "^ Aug. 18,1902 do do .7 Sept. 8,1902 do . .do.... 72 Sept. 27, 1902 do do .63 Oct. 11,1902 do do .75 Sept. 24, 1903 .do do .. 94 Oct. 15,1903 do do .78 June 8, 1904 do do 96 June 15,1904 do. . do. .. 1 4 Aug. 31,1904 do do .... .8 July 29,1902 Ausr. 18,1902 ... .do do Point 4 1 9 do ... 1 2 Sept. 8,1902 Sept. 27, 1902 do do .99 do do Oct. 11,1902 do . do ... 81 June 15,1904 July 8, 1904 do do • .0 ...do do Aug. 31,1904 Oct. 15,1904 do do 62 do do .* .0 Oct. 6, 1905 .do Old Mission Bridge- 3 May 23,1903 Sept. 9,1903 Aug. 7,1900 July 15,1902 Baldwin division (Santa Anita Creek), do Heading . 3 do . 1 4 15.4 . do 16.5 Oct. 2, 1903 do Heading 28 Oct. 5, 1904 do 19. 5 Oct. 6, 1905 Aug. 7, 1900 do Below headgate of Ranchito ditch 16.8 Gate ditch Near head 8.7 July 15,1902 Oct. 2,1903 do In flume at road crossing. 10.6 do do 5 5 Oct. 11,1904 do do 11. 1 Oct. 6, 1905 Jan. 30,1912 Aug. 9,1912 Jan. 30,1918 Oct. 3 1903 do. . .do.... 11.2 Duarte canal About one-fourth mile below tailrace of Pacific Light & Power Corporation's power house at Azusa, Calif. do .. ..do 9 9 do . .do .'-.. 7.8 8 Durfee ditch ... . . Road crossing above ranch house 1.6 Oct. 5,1904 do .0 Aug. 7,1900 Aug. 8,1900 Oct. 9, 1898 Killon's pumping plant 4 wells near El Monte 10.2 Little Lake .22 1.64 Sept. 23, 1899 July 3,1898 July 7, 1898 Oct. 3,1903 Oct. 5, 1904 Oct. 6, 1905 do . Alhambra water 1.38 Puente ditch SOper cent of usual head in ditch. . 1.''2 Rincon ditch 2.47 do Rincon road crossing 3.4 do do 1.0 ...do do 3.4 Aug. 8,1900 June 2,1911 Rodriguez ditch Near Old Mission 2 San Gabriel Water Co. 's canal do 100 feet above U. S. G. S. gaging station on San Gabriel River near Azusa, Calif 6.2 June 22,1911 Sept. 1,1902 Jan. 21,1918 do . . . 15 .9 Southern California Edison Co.'s canal. do Tunnel 4 A 29 Jan. 30,1918 do 31 July 18,1918 Aug. 7,1900 July 15,1902 Oct. 2, 1903 Oct. 5,1904 Oct. 6,1905 July 3,1898 Aug. 7,1900 July 3,1898 Aug. 7,1900 Oct. 3, 1903 do do 47 Standiferd ditch . . . 14.6 do 19.1 .....do 14 . . do do 12.9 do do 15.6 Temple ditch 9.1 do 1.2 Whittier ditch . El Monte road crossing 2.52 do 5.71 do Pumping plant east of El Monte, developed water. 5.1 SAN GABRIEL RIVER BASIN. 437 Discharge measurements of miscellaneous water supplies at points in San Gabriel Valley, Calif., for 1900. [Made by W. W. Cockins.] Date. Locality. Dis- charge. Date. Locality. Dis- charge. 1900. Sept. 17 17 Bradbiory ranch, Santa Anita and Rose avenues. San Gabriel Sanitarium tunnel. W. A. Highland Rose avenue, Lamanda Park. Chapman ranch, two wells pumped; 1 artesian well. Chapman ranch, four wells pumped. Chapman ranch, natural flow of ci^naga. Chapman ranch dairy Sec-feet. 1.44 .04 .10 1900. Sept. 21 21 13 13 13 13 14 14 14 14 17 17 14 14 15 15 15 15 15 Duarte Mutual Improvement & Canal Co. Beardsley Water Co Sec-feet. .78 .44 18 Morengo Water Co., Southern Pacific Co. 's Garfield station (weir). Morengo Water Co.'s weir in Morengo Canyon (weir). Los Robles Water Co.'s reser- voir (weir). Reservoir at junction of Glen- arm and Los Robles avenues, Pasadena (weir). L82 19 19 20 20 1.01 1.90 .07 .72 .46 .31 .068 Chapman ranch, total. . . Alhambra Water Co., weir No. 1. Alhambra Water Co., weir No. 2. Total 1 10 3.70 Brick kiln between Molino and Hope streets, Padadena. Oak Knoll Park, Pasadena Patton tunnel, near Kewen Lake. Patton 's east canyon. . .02 20 20 2.58 .34 .34 .18 1 48 Patton's east canyon, natural flow ; pump not running. Mission ditch, Patton ranch. . . Winston ranch ... .37 2.92 Santa Anita Canyon, natural flow. Sierra Madre Water Co.(weir) Remamettes east of Sierra Madre. Monrovia Water Co., 3 wells pumped. Monrovia Canyon, to Monrovia Water Co. (weirs). To Bradbury .20 .56 24 .22 .145 .09 3.24 Shorbes ranch ( weir) .18 24 24 18 Yoakham-'s ranch (weir) Robert Liddel, San Pasqual and Shorb (weir). R. W. Scoville (weir) .12 .10 .07 Mrs. Black. San Pasqual and Craig streets (weir). Momingside ranch (weir) .07 24 .428 .116 .04 Total .544 Discharge measurements ofivater supplies in San Dimas Wash, Calif, for 1900. [Made by Irwin F. Daniels.] Date. Well. Dis- charge. 1 Date. Well. Dis- charge. Sept. 27 27 Daty & Sons Sec-feet. L80 1.20 .80 .30 .70 .50 L60 i 1 Sept. 27 27 27 1 27 1 27 \ 27 j A.zusa city well Sec-feet. 20 San Dimas Irrigation Co., F. D. Smith well. Thacker well Walker well .90 27 Citizens' Water Co. (Covina)... Covina plant, Deacon well Natural flow, San Dimas Can- yon. Spark's well .10 .44 27 Smith well (privatp) .04 27 Chapman well 27 Ruddock well .40 27 Artesian Belt Co. , 2 wells 1L38 438 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Discharge measurements in SanGabriel Valley at wells on Lordsburg Mesa, Calif., for 1900. [Made by Irwin F. Daniels.] Date. Well. Dis- charge. Date. Well. Dis- charge. Sept. 27 27 Sec.-fect. L52 .48 .30 .70 .10 .16 .24 .20 .16 .30 .76 .30 .80 Sept. 27 27 27 27 27 27 27 27 27 27 27 Kulp (Intermittent) south of Mesa Avenue. D. Fulton Sec-feet. 0.20 SnTTITlPr. . 27 Sheldon Bros .50 27 La Verne Land & Water Co. . . Rodgers Steves .20 27 Daniels & Overholtzer 1 34 27 True (5 days in 30) .54 27 Rodney Roper . Hauser Bros .76 27 Hayes & Stratton .50 27 Wallace ... Sleider .88 27 Milliard Rutherford & Co .40 27 New Deal Water Co. . . .40 27 N orris Kiser .90 27 WilUamsBros 12.64 WATER ABSORBED IN SAND AND GRAVEL. During the winter of 1902-3 the precipitation in southern Cahfornia was greater than at any time during the preceding 10 years. This condition led to heavy irrigation during the spring of 1903, many irrigators taking advantage of it to thoroughly saturate the soil at a time when water was plenty and cheap, thereby saving much expense and contention which always accompanies a later irrigation when water is scarce and expensive and the demand is greater than the supply. Immediately after the rain of April 16, 1903, a series of measure- ments were made by W. B. Clapp under the direction of the United States Geological Survey to determine the quantity of water being absorbed in the sand and gravel washes of the larger tributary streams of the three principal river basins of southern California — Santa Ana, San Gabriel, and Los Angeles rivers. Measurements were taken at the mouths of the canyons where the streams leave the mountains, at all canal diversions, and at such intervals along the streams as time and the available force detailed for this work would allow, the location of the point where the stream entirely disappeared or left the valley being noted. These measurements show the quantity of water taken up in the sand and gravel wash of this stream on the days given, and the following tables give this quantity in second-feet and acre-feet for a period of 24 hours: LOS ANGELES RIVER BASIN. 439 Water discharged from tributary streams and sinking in the San Gabriel River basin above El Monte, Calif., for 1903. stream. Second-feet. Acre-feet. Passing El Monte. Diver- sion. Waste. Total. Diver- sion. Waste. Total. Second, feet. Acre- feet. APR. 26. San Gabriel 40 285 19 9 40 29 325 19 9 40 29 79 565 38 18 79 57 644 38 18 79 57 229 454 San Dim as Dalton. Santa Anita Eaton Canyon . 40 382 422 79 757 833 229 454 MAY 23. San Gabriel . 70 2 1.3 3 3 97 .5 1.4 10 3 167 2.5 2.7 13 6 139 4 26 6 6 192 1 2.8 20 6 331 5 5.4 26 12 SanDiTTias. Dalton. Santa Anita Eaton Canyon 1 79 112 191 158 222 380 . 1 .. 1 LOS ANGELES RIVER BASIN. GENERAL FEATURES. Los Angeles River is formed by Tujunga, Pacoima, and other small creeks, whose sources lie in the Sierra Madre northeast of the city of Los Angeles. These streams leave the mountains at a point about 25 miles above the city and enter the comparatively flat country of the San Fernando Valley, where, except at times of excessive flood, the waters disappear in the sand and gravel washes. At the lower end of this valley is a secondary range of hills, extending from east to west, and bedrock obstruction forces the water to the surface to form what is known as Los Angeles River. Below this point the river flows through the flat country of the Los Angeles Valley and enters the Pacific near the town of Long Beach. During the summer the entire flow of Los Angeles River is diverted at a point about 5 miles above Los Angeles for the supply of the city, only a small amount of water passing this point except during flood periods. At the city of Los Angeles the river is joined by Arroyo Seco, which drains an area of 21 square miles in the Sierra Madre. This stream issues from the mountains on the west side of Pasadena Mesa and passes through an opening in a granite spur known as Devils Gate. Between the point where it leaves the mountain and Devils Grate lies a broad river bottom 2 miles long, composed of coarse material. In passing over this the water sinks rapidly, diminishing in volume of flood water from the mouth of the canyon to Devils Gate. 440 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. LOS ANGELES RIVER ABOVE LOS ANGELES, CALIF. Discharge of Los Angeles River at weirs above Los Angeles, Calif., for 1896-1897. Weir No. 11, 9.88 miles above city limits. Discharge in second-feet. Maximum. Minimum. Mean, August September. October November.. December. . Weir No. 1, 9.79 miles above city limits. 1896. August 21 21 26 24 23 19 19 19 19 19 20 20 20 21 20 1 230 September l' 190 October . . 1 230 November 1 250 l'230 Weir No. 4, 7.27 miles above city limits. August September.. October November . . December. . January.. 46 41 44 44 41 43 56 41 44 52 43 46 55 43 47 47 44 46 Weir No. 5, 4.87 miles above city limits. August September . October November . . December.. January... February. 77 67 71 76 63 71 82 65 69 76 68 70 96 67 72 96 G7 73 96 71 77 Weir No. 8, 3.65 miles above city limits. August September. October Noveniber.. December.. January. . 73 67 70 73 65 69 83 65 69 74 67 71 93 08 73 79 -■^ 73 LOS ANGELES RIVER AT THE NARROWS, CALIF. The streams entering San Fernando Valley have brought down immense quantities of sand and gravel from the mountainous area, and thus have formed the San Fernando Plains. This coarse deposit acts as a natural regulator, absorbing the flood waters, which grad- LOS ANGELES EIVEE BASIN. 441 ually appear lower down. The rainfall of southern California was deficient for the few years prior to 1902, but the discharge of Los Angeles River at The Narrows remained exceptionally constant, the decrease in 1900 being not more than 20 per cent of the average. On account of the numerous law suits which have arisen regarding water rights on this river, a thorough study of its discharge was in- stituted by the city of Los Angeles, the work being under the direc- tion of J. B. Lippincott, as consulting engineer for the city. The majority of the measurements were made by C. A. Miller, although a number of them were made by F. H. Olmsted, city engineer. Sev- eral weirs were placed in the river where the measurements are made. The points of measurements are as follows, in order downstream: Weir A, at the intersection of Pacoima Avenue with Los Angeles River, in the Lankershim Rancho subdivision. Weir B, at the intersection of Vineland Avenue with Los Angeles River. Weir C, at the intersection of Fernando Avenue with Los Angeles River. Weir E, at the southwest corner of block 73, Providencia Rancho. Weir G, at the intersection of the east line of block 71, Providencia Rancho, with Los Angeles River. Weir L, 770 feet above weir H. Weir H, approximately 300 feet east of the intersection of Buena Vista Street with Los Angeles River. Weir I, 2,543 feet below weir H, Weir J, 600 feet east of the west line of block 69, Providencia Rancho. Weir K, in block 79, Providencia Rancho, 300 feet west of center. Measuring bridge P, near the southwest corner of block 81, Providencia Rancho, in the head works site of the city of Los Angelos, commonly known as the Pomeroy & Hooker tract, where river turns to the east at angle of 90 degrees. Measuring bridge Q, about 400 feet above the junction of the Verdugo Wash with Los Angeles River. Measuring bridge No. 2, about 600 feet above the head of the power ditch of the Los Angeles City Water Co., in the so-called Crystal Springs tract. Weir No. 7, 1 mile below the head, in the main supply ditch, sometimes called the Woolen Mill ditch, in the headworks site. Measuring point No. 7B, at a 3-foot cement pipe in the same ditch, west of bridge No. 2 and at the Los Felix ranch house. Weir No. 17, opposite bridge No. 2, on what is called the Glassell tributary. (To get the total flow of river at bridge No. 2, there should be combined the flow at bridges No. 2, No. 17, and No. 7B. In case measurements were not taken on the main supply ditch at No. 7B, the measurement observed at weir No. 7, above No. 7B on the main supply ditch, was used, and the loss between No. 7 and No. 7B, 2.49 second-feet, was deducted. This is shown in detail in the table for bridge No. 2. For bridge Q a similar process is followed, omitting No. 17. For bridge P the observed flow at the bridge is combined with either the flow at No. 7 or at No. 7B.) Weir No. 9, at the mouth of Tujunga Creek, near the western end of the headworks site, and near the intersection of Buena Vista Street with Los Angeles River, Weir No. 10, approximately 200 feet west of weir No. 9, at the outlet of a small cut which was run into the gravel bed for the development of water. Weir M, block 67, Providencia Rancho, on a small stream entering the river in the headworks tract. 442 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Discharge measurements of Los Angeles River, Calif., for 1899-1900. Weir A. Date. Dis- charge. Average for month. Date. Dis- charge. Average for month. 1899. Aug. 14 Sec.-ft. 0.565 .660 .500 .500 .687 .725 .721 .678 .768 Sec.-ft. 1 0. 612 } .500 .687 .723 .723 1900. May 17 Sec.-ft. 0.461 .461 .402 .310 .368 .372 .430 .378 .400 .328 .380 Sec.-ft. 0.461 ^ 19 June 12 } .431 Sept. 20 29 26 Aug. 1 Oct. 24 s::::::::::::::::::;:::: Nov. 24 15 .370 28 31 Dec. 7 Sept. 8 28 11 . . ... .368 27 Nov. 10 .380 Mean .649 .402 1899. Aug. 14 0.500 .500 .500 .755 .937 .941 .864 .982 } ! 0.500 .500 .755 .939 .923 1900. May 17 0.482 .430 .280 .160 .180 .197 .219 .209 .223 .176 .260 0.482 Sept. 20 Jime 12 } .355 .160 ^ 26 29 Oct 24 July 27 Nov. 24 Aug. 1 . . . ] 28 15 [ .198 Dec. 7 31 1 28 Sept. 8 1 ^ u:':....::;:::::;::.;;:: [ ."203 27 1 Nov. 10 ' .260 Mean Mean .723 .276 1899. Aug. 14 2.88 2.88 2.69 2.26 2.88 2.98 3.45 3.42 3.44 } 2.88 2.48 2.93 3.43 3.44 1900. May 17 2.98 2.91 2.45 2.50 2.48 2.48 2.55 1.58 2.38 1.63 2.42 2.98 ^ 28 June 12 2.91 Sept. 20 July 27 2.45 26 Aug. 1 Oct. 9 8 . 24 15 Nov. 24 . 31. . 28 Sept. 8 Dec. 28 ^ 11 I 1.86 27 . Nov. 10 2.42 Mean Mean 3.03 2.52 1899. Aug. 14. 5.55 5.55 5.35 5.25 5.99 6.53 6.24 6.24 6.24 6.30 } 5.55 } 5.30 5.99 } 6.38 6.26 1900. May 15 5.45 5.18 4.81 4.80 4.80 4.53 4.47 4.88 4.49 4.65 4.30 ■ 4.67 5.45 ^ 28 Jtme 12 Sept. 20 29. . . 4.99 ^ 26:::::.;.:::::::::::::: July 12 } 4.80 Oct. 25 ^27 Nov. 17 Aug. 1 28 15 I 4.63 Dec. 13 31 21 Sept. 8 ] 26 11 [ 4.48 27 J Nov. 10 ' 4.67 Mean 5.89 4.84 LOS ANGELES RIVEE BASIN. 443 re measurements of Los Angeles River, Calif ., for 1899-1900 — Continued. Weir G. Date. Dis- charge. Average for month. Date. Dis- charge. Average for month. 1899. Aug. 14 Sec.-JL 7.92 7.92 7.60 7.60 7.66 8.60 9.17 8.99 8.90 8.90 8 92 Sec.-JL \ 7.92 j. 7.60 } 8.13 1 9.08 8.90 1900. May 15 Sec.-jt. 7.94 7.63 7.00 6.45 6.45 6.80 6.87 6.72 7.00 6.68 6.99 Sec.-Jt. 7.94 28... . June 12 } 7.31 Sept. 20 29 26 July 27 6.45 Oct. 9 Aug. 1 25 15 .. 6.70 Nov. 17 31 28. . Sept. 8 1 Dec. 13 11 V 6.80 21 27 1 26. Nov. 13. 6.99 8.33 7.03 28 Sept 20 26 Oct. 9 25 27 Nov 17 28 Dec. 13 21 26 9.08 8.03 9.00 8.59 8.89 8.74 8.59 9.58 9.22 9.48 10.15 9.93 . 10.04 10.02 10.02 10.11 10.30 9.42 May 15. 23. June 12.. 29. July 27. Aug. 1. 8. 15. 31. Sept. 8.. 8.85 8.73 8.62 8.30 7.53 7.53 7.59 7.69 8.02 7.82 8.20 7.76 8.34 1899. Aug. 14. . . 11.88 12.19 11 60 12.03 11.60 12.66 12.66 13.73 13.47 13.42 13.64 13.80 12.04 11.82 12.31 13.60 13.62 1900. May 15 11.42 11.21 11.01 10.68 9.96 9.96 10.16 10.13 10.57 10.15 10.39 10.03 10.54 • 1 1 28 23 11.31 Sept. 20 June 12 "^ 26 29 Oct. 9 July 27. 9.96 25 Aug. 1 27 8 Nov. 17 .. .. 15 10.20 28 31... . Dec. 13 Sept. 8 21 11 10.19 26 27 Nov. 10 10.54 Mean Mean 12.68 10.51 1899. Aug. 14. . . 17.18 16.91 17.15 17.32 17.19 18.33 19.04 18.72 18.93 18.99 } } 17.04 17.23 17.76 18.88 18.96 1900. May 15 16.25 16.05 15.66 15.49 15.58 14.74 14.37 14.94 14.69 14.80 14.54 14.74 14.31 14.92 16. 15 15.57 15.16 28 23 Sept. 20 June 12 26 29 Oct. 9 July 12 25 27 Nov. 17 Aug, 1 28. . 8 14.70 Dec. 13 15 26 31 Sept. 8 11 14.53 27 Nov. 10... . 14.92 Mean 17.97 15.17 444 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Discharge measurements of Los Angeles River, Calif., for 1899-1900— Qontmuedi. Weir J. [Total discharge of river at weir J equals discharge over weir + discharge at No, 7, or + No. 7B + 2.49.] Date. Discharge at No. 7, or N0.7B+2.49 Discharge over weir. Total dis- charge for weir. Average for month. 1899. Aug. 14 . . . Second-feet. 18.59 17.90 17.90 18.28 48.08 17.45 18.02 13.78 13.90 13.66 Second-feet. 0.55 .49 .49 .49 .44 1.85 2.91 6.71 6.34 6.73 Second-feet. 19.14 18.39 18.39 18.77 18 52 19. 30 20.93 20.49 20.24 20.39 Second-feet. 18. 76 18.58 18.91 20.71 20.31 28 Sept. 20 26 Oct. 9 25 . . Nov. 17 28 Dec. 13 26 Mean 19.45 1900. May 15 20.00 16.37 19.81 16.31 18.49 19.25 1.39 1.67 .86 .86 .41 .46 .42 .52 .39 1.49 21.48 18.04 20.67 17.17 18.90 19,71 } n.n 23 June 12 29 > 18.92 Aug. 15 31 Sept. 8 11 19.81 17.59 14.84 20.33 17. 98 16.33 1 19. 15 16 33 27 Nov. 10 . Mean... 18. 69 Weir K. [Total discharge of river at weir K equals discharge over weir + discharge at No. 7, or + No. 7B+ 2.49.] 1899. Aug. 14 18.59 17.90 17.90 18.28 18.08 17.45 18,02 13. 78 13 90 13.66 4.13 3.92 3.91 3.98 4.13 5.70 6.97 10.69 10.69 10.92 22.72 21.82 21 81 22.26 22.21 23.15 24.99 24 47 24.59 24.58 ! 22.27 28 Sept. 20 ■ 26 22.03 Oct. 9 25 Nov. 17 . 28 Dec. 13 26 ... 24.58 Mean ... 23.26 . 1900. May 15 20.09 16.37 16.32 4.94 4 94 2.93 2,55 2.71 2.55 2.81 2.80 2.50 4. 12 25 03 21.31 19 25 } ^ 23::;:::::;:::;;;;::::;:;:::;::;;::::;:::::::::::: July 2 19.25 Aug. 1 15 18.49 19.25 21 20 21,80 } 31 21 50 Sept. 8 ^ 11 19.81 17.59 14.84 22.61 20 09 18.96 } 27 . 21.35 Nov. 10 18.96 Mean 20.85 LOS ANGELES RIVER BASIN. 445 Discharge measurements of Los Angeles River, Calif., for 1899-1900 — Continued. Bridge P. [Total discharge of river at bridge P equals discharge at bridge + discharge at No. 7, or + discharge at No. 7B.] Date. Discharge at No. 7 or No. 7B. Discharge at bridge. Total dis- charge at bridge. Average for month. 1899. \ne. 25 Sccond-fcct. 18.66 17.90 18.66 18.08 17.45 17.45 18.02 13.18 13.90 13.66 Sccond-fcct. 20.22 19.36 21.08 19.81 17.62 21.06 25.73 27.75 31.94 27.67 Sccond-fcct. 38.88 37.26 39.74 37.89 35.07 38.51 43.75 40.93 45.84 41.33 Second-feet. 38.88 Sept. 20. 1 38. 50 Oct. 10. . 25 37. 16 28 Nov. 17... 42.34 } 43.58 28 . Dec. 13 . 26. ... Mean .... 40.09 1900. May 15 17.60 13.88 17.32 13.83 14.00 14.00 14.00 16.00 21.22 20. 28 18.59 19.51 16.99 17.04 18.71 19.94 19.26 19.67 18.38 38.82 34.16 35.91 33.34 30.99 31.04 32.71 35.94 } 36.49 35.91 23 June 12 . . July 2 1 32.16 12.. Aug. 1 8 33. 23 15. Sept. 8 ^ 11. 17.32 15.10 36.99 33.48 } 35.23 28 Mean. 34.60 1 Bridge Q. [Total discharge of river at bridge Q equals discharge at Q + discharge at No. 7-2.49, or + No. 7B.] Discharge at 7-2. 49, or 7B. Discharge at bridge. Total dis- charge at bridge. Average for month. Sept. 20.. 27.. Oct. 10.. 25.. 28... Nov. 17.. 29. Dec. 13 . . 26.. May 15.. 23. Jtme 12 . . July 2 . . . 12. Aug. 1... Sept. 8... 11. 28 Mean. Second-feet. 15.41 16.17 15.59 8.21 8.23 9.36 12.20 11.41 11.17 17.60 13.88 17.32 13.83 14.00 14.00 "17." 32' 15.10 Sccond-fcct. 28. 12 27.99 27.77 27.66 36.48 39.71 33.89 35.99 31.86 28.42 27.97 27.64 26.20 24.79 24.48 27.09 26.22 29.33 Second-fcct. 43.53 44.16 43.36 35. 87 44.71 49.07 46.09 47.40 43.03 46.02 41.85 44.96 40.03 38.79 38.48 "43." 54" 44.43 Second-feet. I 43. 84 47.58 45.21 43.93 44.96 39.41 446 SURFACE WATER OF PACIFIC SLOPE, SOUTHERIsr CALIFORITIA. Discharge measurements of Los Angeles River near bridge No. 2. Calif., for 1889-1. Date. Hydrographer. Locality. Dis- charge. 1889. June 15 Wm. Mulholland River Sec-feet. 36.7 15 do Power ditch 11.1 15 do Main supply ditch . . . 11.2 Total at bridge No. 2 59.0 July 15 Wm. Mulholland River .. 33.3 15 do Power ditch . . , . 11.0 15 do Main supply ditch 14.1 Total at bridge No. 2 . . . 58.4 1891. Nov, 18 Wm. Mulholland River . , 68.0 18 do Power ditch 10.0 18 do 3.0 Total at bridge No. 2 81.0 1893. Nov. — Wm. Mulholland River . 58.8 do Power ditch 15.0 do... Main supply ditch (?) 1898. Feb. 28 do 51.8 28 do Glassell tributary ... .7 28 do 15.0 28 do Total at bridge No. 2 67.5 Discharge measurements of Los Angeles River at bridge No. 2, Calif ., for 1899-1900. [Total discharge of river at bridge No. 2 ectuals discharge at No. 2+discharge at No. 7B, or No. 2+No. 7— 2.49.] Date. Discharge at No. 7- 2. 49, or No. 7B. Discharge at No. 17. Discharge at bridge. Total dis- charge at bridge. Average for month. 1899. Aug. 19 Sec-feet. 15.59 16.17 15.41 16.17 15.59 8.21 8.23 8.78 9.36 12.20 11.41 11. 17 Sec-feet. . 0.06 .06 .06 .06 .05 .05 .05 .05 .06 .06 .07 .07 Sec-feet. 41.29 42.41 40.23 40.07 39.35 48.88 44.45 48.73 49.71 43.40 46.69 46.89 Sec-feet. 56.94 58.64 55.70 56.30 54.99 57.14 52.73 57.56 59.13 55.66 58.17 58.13 Sec-feet. 57.79 Sept. 20 . . 56.00 27 Oct. 10 25. 28 31 Nov. 17 . 57.39 29 .... Dec. 13 58. 15 26. Mean . 56.99 1900. May 16... 17.60 13.88 17.32 13.83 15.32 14.00 14.00 16.00 16.76 .14 .14 .14 .10 .14 .10 .10 .10 .10 39.61 38.46 39.23 35.38 40.10 34.62 34.77 38.58 35.36 34.27 35.56 34.28 39.45 57.35 52.48 56.69 49.31 55.56 48.72 48.87 54.68 52.22 1 54. 91 23 June 12 56.69 July 2 } 52.43 13 Aug. 1 1 15 31 1 Sept. 8 . . . 11 17.32 15.10 14.84 .20 .08 .10 53.08 49.46 54.39 \ 51.27 54.39 28 Nov. 10 Mean 53.46 LOS AISTGELES RIVER BASIN. 447 Average discharge of Los Angeles River at weir 9, Calif ., for 1899-1900. Month. January. . February. March April May June Sec-feet. 1.17 1.00 1.16 1.10 .71 Sec-feet. 0.52 .49 .39 .38 .30 .24 July August — September October . . . November. December . Sec-feet. 0.55 .56 .52 Sec-feet. 0.15 .18 .20 Average discharge of developed water at weir 10. January . . . February. . March April May June Sec-feet. 6.'%' .93 Sec-feet. 0.89 .79 .82 .79 July August September. October . . . November. December . Sec-feet. 0.79 .79 Sec-feet. 0.74 Average discharge of small tnhutary of Los Angeles River at iveir M, Calif., for 1899. January. . February March April May Jime Dis- charge. Sec-feet. 0.29 .20 .20 .14 .07 .06 July August September October... November December. Dis- charge. Sec-feet. Dry. Do. Do. Do. Do. Do. Average discharge of cut of West Los Angeles Water Co., from gravel beds of Los Angeles River, in San Fernando Valley, Calif., for 1899-1900. Month. 1899 1900 Month. 1899 1900 May Sec-feet. Sec-feet. 5.79 5.85 5.75 5.87 Sec-feet. 6.02 5.94 6.07 6.08 Sec-feet. June October . July 6.01 448 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Average discharge of Los Angeles River, Calif., for 1899-1900. Measuring point. Interven- ing distance along river. Average discharge, August to December, inclusive, 1899. Rate of growth per 100 feet, 1899. Average discharge, May to November, inclusive, 1900. Rate of growth per 100 feet, 1900. Weir A Feet. Sec.-fcct. 0.649 Sec-feet. 0.402 10,280 0.001 .066' 0.001 Weir B .723 .276 3,486 .064 Weir C 3.03 2.52 7,069 .039 .033 Weir E 5.89 4.84 4,585 .053 .048 Weir G.. 8.33 7.03 1,041 .105 .105 Weir L 9.42 8.12 770 .424 .310 Weir H 12.68 ia5i 2,543 .210 .183 Weir I 17.97 15.17 3,926 .038 .089 Weir J 19.45 18.69 3,600 .100 .060 Weir K 23.06 20.85 6,345 .268 .217 Bridge P ' 40.09 34.60 4,629 .095 .163 Bridge Q 44.49 42.15 6,756 .185 .167 Bridge No. 2 56.99 53.46 DIVERSIONS FROM LOS ANGELES RIVER. During the summer the amount of water in the 44-inch conduit and in the main-supply conduit of the city of Los Angeles has been measured to determine the amount of water diverted from Los Angeles River for domestic supply. The water is taken from the river near Burbank and the measurements show the entire surface flow and underground development of the river at this point during the summer. Some return seepage water appears again in the river channel near Huron Street, Los Angeles, near which point the city has an underground gallery or tunnel for collecting an auxiliary supply which is pumped into the reservoir and used in the general distributing system. LOS ANGELES RIVER BASIN. 449 Discharge measurement; of Los Angeles River and diversions at Los Angeles, Calif., for 1904-5. 1904. Apr. 15 May 25 June 18 24 27 Julv 19 Aug. 9 18 Sept. 7 20 Oct. 20 25 Nov, 18 Dec. 28 1905. May 15 June 22 July 28 Sept. 19 Made by — F. B. Cook Clapp and Cook. F.B. Cook Clapp and La Rue. . La Rue and Cook.. P. B. Cook La Rue and Cook... F. B. Cook E. C. La Rue do F. B. Cook La Rue and Cook... E. C. La Rue Discharge. 44-inch conduit. Sec.-ft. 42.3 40.0 29.2 31.7 34.2 33.1 29.9 30.5 29.7 31.1 31.9 31.4 33.3 27.7 42.0 38.0 37.0 3.5.3 Main supply ditch. Sec.-ft. 4.5 8.0 10.8 10.2 10.4 10.8 10.4 11.0 11.6 11.6 11.8 10.0 11.0 9.9 8.4 River at Huron Street. Sec.-ft. 3.7 5.3 3.4 8.2 10.6 3.3 46.8 48.0 40.0 40.3 46.5 ^8.6 40.3 44.9 40.1 45.5 5L7 43.0 53.5 59.9 63.6 5L2 50.0 47.4 Measurements of flow, in second- feet, of diversions from Los Angeles River hy the city of Los Angeles for 1906-1909. Date. 44-inch conduit discharge. Main-sup- ply conduit discharge. Total. Date. 44-inch conduit discharge. Main-sup- ply conduit discharge. Total. 1906. Feb. 24 a Apr. 20 26.59 36.23 31.76 34.73 33. 95 30.49 32.86 38.11 29.48 32.73 33.61 42.50 44.96 50.46 35.13 32.24 36. 45 38.51 35.52 6.58 7.67 15.86 9.43 10.23 13.67 11.30 4.43 13.20 13.50 15.66 22.61 19.50 8.55 18.03 17.38 14.69 16.26 19.63 33.17 43.90 47.62 44.16 44.18 44.16 44.16 42.54 42.68 46.23 49.27 65. 11 64.46 59.01 53.16 49.62 51.14 54.77 55.15 1908. Apr. 29 May 21 44.44 43. .31 42.72 37.73 33.34 38.12 35.73 34. 73 38.73 40.24 35.54 36. 91 40.19 37.99 37.84 37.93 37.28 35.28 36.04 37.02 12.30 13.81 12.67 12.96 17.16 13.00 15.16 . 16. 43 16.30 14.65 21.78 22.98 25.47 24.65 23.41 23.25 21.90 22.22 21.06 22.03 56.74 57 12 June 23 June 2.5 Julv 31 55 39 July 17 50 69 20 Aug. 3 50 60 Aug. 22 5 51 12 31 7 50 89 Sept. 21 26 51.16 ^ 23 Sept.22 55 03 Nov 22 Oct 23 54 89 Dec. 18 Nov. 20 57 32 Dec 30-. 59 89 Apr. 8 1909. Mar. 16 May 9 65.66 Apr. 9 May 13 62 64 July 12 .. .. 61 25 Aug. 8 June 9 61 18 29 Julv 20 59 18 Oct. 8 Aug. 12 57.50 Nov. 9... Sept. 8 57.10 59.05 Oct. 23 o On Feb. 24, 1906, 23.9 second-feet was passing intake and is not included in above total. On Apr. 20, 7.4 second-feet was passing intake and is not included in above total. PACOIMA CREEK WEAR SAN FERNANDO, CALIF. Location.— In SE. \ NE. \ sec. 24, T. 3 N., R. 15 W., about 600 feet above mouth of canyon, and about 4 miles northeast of San Fernando, Los Angeles County. Drainage area. — 27.9 square miles (measured on topographic map). Elevation. — About 1,500 feet above sea level. Records available. — ^March 31, 1916, to September 30, 1918. (Not complete.) Gage. — Gurley graph water-stage recorder, with concrete well and house, on left bank, Bbout 600 feet above mouth of canyon, installed December 2, 1916. (See PL XV, A.) Previous gage was a staff fastened to a boulder on left bank, 216 feet above water-stage recorder. It was at independent datum and had a different control. 142131 ° —21— v,'SP 447 29 450 SURFACE WATEE OF PACIFIC SLOPE, SOUTHEPvN" CALIFORNIA. Discharge measurements. — Made from cable 20 feet above gage well or by wadiag at gage. Channel and control. — Sand, gravel, and boulders; not permanent. Left bank is steep rock cliff; right bank sloping and covered Avith brush and trees. Control ia a low boulder-and-concrete dam built across channel about 7 feet below gage well. Lowest point in control is at elevation of 1.1 feet on gage. Extremes of discharge. — 1916-1918: Maximum stage from water-stage recorder, 4.68 feet at 4 p. m. December 24 (discharge 1,440 second-feet); stream dry July 11, 1917, to January 11, 1918, and June 26 to September 30, 1918. DrvBRSiONS. — None above station. There is a diversion just below control. E:egulation. — None. Accuracy. — Stage-discharge relation not permanent on account of shifting of gravel above control. Rating curves fairly well defined. Daily discharge ascertained by applying to the rating table mean daily gage height determined by inspecting recorder graph. Records fair. Discharge measureinents of Pacoima Creeh near Stin Fernando, Calif., for 1916-1918. Date. Made "by— Gage height. Dis- charge. Date. Made by- height. Dis- charge. 1916. Mar. 31 F. C. Ebert Feet. 1.26 1.26 1.14 1.04 .85 ,82 .60 .48 .32 .24 2.05 1.98 2.04 1.98 1.95 2.13 2.18 2.49 2.60 2.37 2.16 2.03 1.96 1.92 1.90 1.76 1,75 Sec-fl. 21 21 17 12 7.1 6.5 3.4 1.7 ; 23 11 i 20 10 8.1 6.1 13 136 161 98 48 26 18 14 12 9.9 9.0 1917. May 3 ] 12 . June 8 . July 1 . Sept. 12 . 14 . 15 . Oct. 28;. Nov. 17 . Dec. 30.. 1918. Feb. 21 : 27 Mar. 7 . 8 . 13 . 20 ( 26 ] Apr. 3 , 17 . 24 . May 2 ^ 6 . 20 . June 5 ] 22 ( July 14 ] 5. J. Tompkins. Feet. 1.74 1.72 1.67 1.50 Sec.-ft, 7.3 Apr. 6 17 27 H. J. Tompkins do do J.C. Dort . , .do ...do ...do 5.8 2.5 .1 May 12 ...do ...do ...do ...do ...do ...do ■ ■ '"I "!'.".!! '"i." 23* 1.70 a.O 22 June 7 23 July 2 13 Dec. 29 do do do H, J. Tompkins do J C Dort a.Q a.O a.O a.O .03 1917. H.J.Tompkins J.C. Dort E. TompMn B. J. Tomp] ...do ...do ...do :.. W. Sopp a. J. Tomp] ...do.. ... ...do ...do :!. w. vSopp ...do ...do H. J. Tompl 1 W. Sopp [I. J. Tompl 6.3 Jan. 10 19 dns. 1.86 3.10 2.31 2.64 2. 22 13 506 Feb. 2 13 16 H. J. Tompkins Ernest Tompkins J C Dort 99 183 52 19 21 dns. 1.84 1.80 1.72 1.72 1.70 28 15 23 26 Mar. 5 do H. J.Tompkins do J. C. Dort 8.6 7.2 4.3 14 dns. 1.66 1.65 1.60 1.48 4.4 23 31 Apr. 11 H.J.Tompkins '.V^Ao'.'////.'.'.'.'.'.'.'.'.'.'.'. J.C. Dort 3.3 1.7 .12 12 dns. a.O 23 H. J.Tompkins ffl Stream dry. Daily discharge, in second-fee t, of Pacoima Creek near San Fernando, Calif, for 1916-1918. Day. Mar. Apr. , May. June. July. Day. Mar. Apr. May. June. July. 1916. 1 191^. 16 . . . . 2 0.8 17 16 16 15 15 15 13 3 18 1 4 19 1.2 . 1 5 20 6 21 21 7 3.2 22 6.6 "'i.'9' . 1 8 23 9 24 14 13 10 18 18; 25 : 11 26 12 7.3, 27 13 13 .4 28 - . 14 19. 29 15 30 ' '"**'*' ': 31 21 U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 447 PLATE XV ^" l*L ^^ CONCRETE WELL, HOUSE, AND CONTROL. A, Pacoima Creek near San Fernando, Calif.; B, Tujunga Creek near Sunland, Calif.; C, Haines Creek near Tujunga, Calif. U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 447 PLATE XVI A. WATERMAN CANYON CREEK NEAR SAN RERNARDINO, CALIF. Showing gravel and sand deposited by first high water after forest fire. B. FOUNDATION FOR GIRRALTAR DAM, ON SANTA YNEZ RIVER NEAR SANTA BARRARA, CALIF. C. CARLE SECTION ON SANTA YNEZ RIVER NEAR SANTA BARBARA, CALIF. LOS ANGELES KIVER BASIN. 451 Daikj discharge, in second-feet, of Facoima Creek near San Fernando, Calif., for 1916- 1918 — Continued. Day. Dec. Jan. Feb. Mar. Apr. May. June. July. 1916-17. 1 23 21 19 17 15 14 14 13 12 12 11 12 14 14 14 14 13 13 19 17 16 U 14 14 14 14 14 14 14 14 13 12 12 12 12 12 11 11 11 10 10 10 10 9.5 8.5 7.5 11 11 11 37 141 232 165 120 123 95 ■'88 78 68 64 57 55 53 50 46 43 39 36 32 29 26 26 25 24 22 22 21 20 19 18 17 16 18 16 15 15 15 14 14 13 12 11 11 10 9.5 9.5 10 11 11 12 10 10 10 11 \2 13 11 10 9 8.5 8.5 8.5 9 9 9 10 10 9 8.5 8.5. 7.5 7.5. 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 6.5 5.5 5.5 6.5 6.5 6.5 8.5 12 10 8.5 6.5 5.5 5.5 6.5 6.5 5.5 5.5 5. .5 4.5 4.5 4.5 4.5 4.1 3.7 3.7 3.7 3.3 3.3 3.3 2.9 2.9 3.3. 2.5 2.1 1.3 .9 .5 .4 .4. .4 .4 .4 .4 .3 .3 .3 .3 .3 .2 .1 0.1 2 2.5 4.5 5 4.0 4.0 4.0 4.0 3.0 3.0 3.0 3.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 425 114 64 37 28 27 27 25 .1 3 .1 4 .1 5 .1 6 .05 7 .05 S .05 9 .05 10. .05 11 12 13 14 15 16 . . . 17.. 18 19 20- 21 22 23 24. 25 26 27 2&.. 29 30 31 Note. — No gage-height record Dec, 31 to Jan. 5 and Jan. : record of flow oa Arr&yo Seco. Disehaa-ge interpolated Mar. 6 able. No flow July 11 to Sept. 30. 8 to Feb. 1; discharge estimated from -12 as gage-height record was not reli- Day. Jan. Feb. Mar. Apr. May. June. July. 1917-18. 1 0.1 !o .0 .0 .0 .0 .0 .0 .2 1.5 .6 1.5 .5.0 9.5 5.5 4.4 10 15 13 9.5 7.5 6.5 6 6 6.5 11 191 88 44 54 230 277 165 ' 111 85 67 61 54 56 52 46 44 42 36 32 28 25 24 22 21 19 18 17 15 14 14 13 13 12 12 11 11 10 10 9.5 9 8.5 8.5 8.5 8 8 7.5 7.5 7 7 6.5 6.5 6 5.5 5.5 5 ; 4.5 4.3 4.3 4.4 4.4 4.4 4.2 4.1 4.0 3.9 3.8 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 2.7 2.4 1.7 1.5 1.4 1.2 1.1 .9 .7 .7 .6 .4 .3 .1 .1 .1 .1 .1 .1 .1 .1 .1 .3 .1 .0 .0 .0 .0 .0 1.1 2 7 3 4 6 7 8 9 10 11 12 0.1 :o .0 .0 .0 .0 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 ;... 29 30 31 ■■ ■ 1 No flow Oct. 1 to Jan. 11 and July 3 to Sept. 30. '", Mar. 20 to May 19, interpolated between measurements on account of shifting control. 452 SUEFACE WATER OF PACIFIC SLOPB^ SOUTHEEN CALIFOElsTIA. Monthly discharge of Pacoima Creek, near Sa^i Fernando, Calif., for 1916-1918. 1916-17. December 2-31... January February March.... April May June July The period . Discharge in second-feet Maxi- mum. 425 23 232 68 13 12 4.5 2.5 11 7 14 8.5 4.5 .1 .00 27.2 14.7 45.6 30.1 10.2 6.70 1.82 .024 Run-off (total acre- feet). 1,620 904 2,530 1,850 607 412 8,030 1917-18. January February March April May. June July The year Discharge in second -feet Maxi- Mini- mum, mum. 0.1 15 277 18 4.5 3.0 1.1 277 0.0 .0 6 5 3.0 .0 .0 Run-off (t9tal acre- feet). 3.1 153 3,810 583 216 29.4 3.7 Note. — No flow August to December, 1917, and August and September, 1918. Record for 1917-18 repre- sents full year. TUJUISTGA CREEK NEAR SUNLAND, CALIF. Location. — Near center of sec. 32, T. 3 N., R. 13 W. (unsurveyed), at a partly con- structed and abandoned dam, about 2 miles above mouth of canyon, and about 4 miles northeast of Sunland, Los Angeles County. Drainage area. — 106 square miles (measured on topographic maps). Elevation. — About 1,600 feet above sea level. Records available. — October 28, 1916, to September 30, 1918. (Discharge measure- ments only, April 1 to August 27, 1916.) Gage. — Stevens continuous water-stage recorder on right bank just above dam. (See PI. XV, B.) Discharge measurements. — Made fi'om cable about 1,000 feet below gage or by wading at various sections near dam. Channel and control. — Gravel and boulders; apparently permanent. Control is concrete dam, which has a notch in center about 20 feet long and 1 foot deep, with steel angle set in the notch near downstream face. (See PI. XV, B.) Zero flow occurs at a gage height of about 0.45 foot. Extremes OF DISCHARGE. — 1916-1918: Maximum stage recorded, 3.35 feet at 4:30 p. m. December 24, 1916 (discharge from revised rating curve defined by 1918 measurements, 1,960 second-feet); minimum stage recorded, 0.47 foot at 5 p. m. August 29, 1917 (discharge, 0.2 second-foot). Diversions. — Two or three ranches divert a part of the low-water flow for irrigation above the station. There are two small diversions between gage and mouth of canyon. Regulation. — None. Accuracy. — Stage-discharge relation permanent. Frequent discharge measm-ements have been obtained and rating curA^e is well defined below 1,000 second-feet. Operation of the water-stage recorder generally satisfactory. Daily discharge ascertained by applying to the rating table mean daily gage height determined by inspecting recorder graph. Records for high water fair ; those for other stages gooda LOS ANGELES EIVEK BASIK. 453 Discharge measurements of Tujunga Creek near Sunland, Calif., for 1916-1918. Date. Made by— Gage height. Dis- charge. Date. Made by — height. Dis- charge. 1916. Apr. 1 10 F. C. Ebert H. J. Tompkins . Feet. Sec.-ft. 66 53 50 41 31 29 21 14 11 8.3 3.4 2.0 12 33 33 124 170 123 61 41 32 22 18 1917. June 10 Aug. 2 Sept. 1 12 27 Dec. 20 1918. Jan. 22 Feb. 16 22 Mar. 3 8 26 Apr. 6 17 May 2 15 27 June 7 22 July 3 Sept. ^2 H.J. Tompkins do do do do E. Tompkins. Feet. 0.74 .52 .50 .49 .49 .59 .60 .62 2.57 1.12 2.35 1.55 1.23 1.07 .90 .87 .82 .72 .64 .60 .52 .49 Sec.-ft. 11 1.7 19 28 Mav 12 do do J. C. Dort .4 .4 .4 22 do do 3.3 C. W. Sopp . . 23 . do July 2 13 Aug. 11 27 H. J. Tompkins 4.2 do do J C Dort H. J.Tompkins do C W. Sopp 4.4 576 38 Nov. 6 do H. J. Tompkins do J.C. Dort 0.77 1.86 2.09 1.84 1.38 1.16 1.06 .94 .86 H.J. Tompkins C. W. Sopp 302 82 1917. Jan. 16 Feb. 6 21 H.J. Tompkins do do do C. W. Sopp 50 33 21 17 23 do do H.J. Tompkins J. C. Dort 16 27 Mar. 6 19 do do H.J.Tompkins C. W. Sopp 9.6 6.8 3.3 31 do.. H. J. Tompkins do 1.3 Apr. 24 May 5 H.J. Tompkins .9 o Correct gage height not known, as intake pipe was covered v/ith gravel. Daily discharge, in second-feet, of Tujunga Creek near Sunland, Calif., for 1916-1918. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1916-17. 1 10 11 12 12 13 13 13 12 12 12 13 14 13 12 12 12 13 13 14 14 13 14 14 14 14 14 14 14 14 14 14 15 20 17 15 15 14 15 15 14 14 14 14 It 14 14 14 14 15 15 15 15 288 161 66 34 33 32 32 32 32 32 33 32 ■ 32 32 31 31 31 31 31 32 a2 31 31 .33 35 40 59 . 49 43 41 39 37 36 35 35 35 35 34 33 33 33 33 33 33 33 32 32 31 30 29 29 29 28 28 25 39 33 34 64 120 182 166 130 182 160 125 101 87 81 75 70 64 62 59 57 58 61 58 54 51 52 50 46 44- 42 40 40 40 38 36 35 34 33 32 32 32 32 32 30 29 28 26 25 24 24 25 29 28 26 25 24 23 23 30 37 30 28 26 24 24 24 23 21 21 21 24 24 21 20 20 19 17 17 15 16 18 20 21 20 18 17 16 16 16 16 21 23 20 18 17 19 19 19 19 17 15 15 17 17 15 14 13 13 14 14 12 12 11 10 10 10 9.5 8 7 6 5.5 5.5 5.5 5.5 4.9 4.9 4.4 4.4 4.0 4.0 4.4 4.0 3.3 3.3 3.3 3.0 3.0 3.0 3.0 3.0 3.0 2.6 2.6 2.6 2.2 2.2 2.2 1.9 1.9 1.6 1.6 1.6 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.9 1.9 1.6 1.9 1.6 1.2 1.2 .8 .8 .8 .5 .5 .4 .5 .5 .5 .5 .5 0.5 2 .5 3 .5 4 .8 5 .5 6 .5 7 .5 8.. . . .8 9 .5 10 . . .6 11 .5 12 .5 13 .5 14 .5 15 .4 16 .4 17 .4 18 .4 19 . .4 20 .5 21 .5 22 .5 23 .5 24 .5 25 .4 26 .4 27........ 28 . . : 10 10 10 .4 .4 29 .4 30 .5 31 Note.— Water-stage recorder not operating satisfactorily Dec. 1-6; Dec. 28 to Feb. 5; and Sept. 24-26. Discharge of these periods interpolated, except Dec. 28 to Feb. 5, estimated from hydrograph of Pacoima Creek and Arroyo Seco. -454 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA, Daily discharge, in second-feet, of Tujunga Creek near Sunland, Calif., for 1916-1918 — Continued. 16.. 17.. IS.. 19.. 20.. 23.. 24.. 25.. 29.. 30.. 31.. 2.2 1.9 2.2 2.2 1.9 2.2 6.0 6.5 6.0 5. 5 4.9 4.4 4.4 4.0 S.3 2.6 2.2 2.6 2.6 2.6 3.3 3.6 3.3 3.6 3.6 3.6 4.0 4.0 4.0 4.0 4.0 4.0 4.4 4.4 4.4 4.4 4.4 3.6 3.6 3.6 3.6 3.3 3.0 3.3 3.6 3.6 4.0 4.0 4.4 4.4 4.4 5.5 5.5 5.5 4.0 4.0 4.0 4.0 4.4 4.4 4.9 5.5 4.9 4.4 4.9 5.5 5.5 4.9 4.9 4.9 4.4 4.4 6 5.5 4.9 4.4 12 20 104 340 123 47 41 37 33 34 59 550 420 148 199 1,050 1,150 1,100 704 340 183 147 131 159 140 Apr. May. 10 9.5 7.5 7 6.5 6.5 7.5 8 5.5 4.4 4.0 4.0 4.0 July. 5.5 4.0 3.3 3.0 2.2 1.9 .5 .5 1.2 1.2 r.2 1.2 1.2 Aug. Sept. a 5 .5 0.4 .4 .4 .4 .4 .4 .4 .4 .4 .4 .4 .4 .4 .5 .5 .5 .5 .5 1.2 2.2 3.6 Note. — No gage-height record June 4-6 and 22; discharge estimated. Monthly discharge of Tujunga Creek near Sunland, Calif, for 1916-1918. Bischarge in seeond-feet. Run-oflf (total in acre- feet). Mcaith. Discbarge in second-feet. Run-oflr (totalin acre- feet). Month. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. 1918-17. October 28-31 .. 10 14 . 288 59 182 87 37 23 15 3.3 1.9 .8 8.5 10 14 31 25 32 21 15 3.3 1.2 .3 .4 9.62 13.0 32.8 35.3 65.2 49.3 25.6 18.0 8.07 1.99 .60 .49 76.3 774 2,020 2,170 3,620 3,030 1,520 1,110 480 122 36.9 29.2 1917-18. OctobOT 2.2 6.5 6 5.5 340 1,150 57 24 12 6 .5 3.6 0.3 1.9 3.0 3.6 4.4 33 24 14 4.0 A .4 0.74 3.67 4.14 4.64 41.4 246 35.9 19.4 7.43 1.70 .45 .82 45.5 November December January November December January 218 255 285 February March February 2,300 15,100 April April May 2 140 May 1,190 June June 442 July July 105 August 27.7 September September The year 48.8 The period... 15,000 1,150 .3 30.6 22,200 LOS AISTGELES EIVEK BASIN. 455 HAINES CREEK HEAR TUJUNGA, CAUF. Location.— In NE. i NE. i sec. 18, T. 2 N., R. 13 W., 800 feet above mouth of canyoa and 1^ miles northeast of Tujunga, Los Angeles County. . Drainage area. — 1.2 square miles (measured on topographic map). Elevation. — About 2,200 feet above sea level. Records available. — February 7, 1917, to September 30, 19l8. Gage. — Gurley graph water-stage recorder on right bank just above concrete control, about 800 feet above mouth of canyon. (See PI. XV, C.) Discharge measurements. — Made by volumetric method, when discharge was very small, and on crest of dam. A bridge ha.s been built 4 feet above dam for use during high water. Channel and control. — Boulders and gravel overlying solid rock; permanent. Both banks are high and fairly clean. A concrete dam, having a maximum height of about 5 feet above bedrock, was built across the channel at downstream face of gage well. A 12-foot concrete wing well was constructed at left end of dam. Crest of dam has a trapezoidal notch 6 inches wide on bottom and 1 foot deep, which makes conti'ol mca-e sensitive for low stages. Zero flow occurs at a gage height of 0.23 foot. Extremes op discharge. — 1917-1918: Maximum stage recorded, 1.37 feet March 10, 1918 (discharge, 6.8 second-feet); minimum stage recorded, 0.32 foot September 20-30, 1917, and August 25 to September 12, 1918 (discharge, 0.03 second-foot). Diversions.— About a mile above the station a tunnel has been driven into the stream bed and a 4-inch pipe carries the water past the gage. This water is used for domestic supply at Tujunga. A similar tunnel, a short distance below the station, develops a small supply during the greater part of the year. Regulation. — A large number of small check dams, constructed of brush and boul- ders, have been built across the stream channel in the upper portion of the drain- age basin. Accuracy. — Stage-discharge relation permanent. Rating curve well defined. Oper- ation 01 water-stage recorder satisfactory throughout the period. Daily discharge ascertained by applying to the rating table mean daily gage height determined by inspecting recorder graph. Records excellent. Discharge measurements of Haines Creek near Tujunga, Calif., for 1917-18. Date. Made by — Gage iieight. Dis- charge. Date. Made by- Gage height. Dis- charge. 1917. Feb. 16 H. J. Tompkins J.C.Dort Feet. 0.50 .50 .48 .36 Sec.-ft. 0.25 .25 .25 .06 1918. Feb. 22 Mar. 7 11 13 20 Apr. 10 Sept. 17 E. Tompkins Feet. 81 1.12 1.09 1.17 .88 .65 .34 Sec.-ft. 1.1 Apr. 2 12 cVw. Sopp 3 do 3 4 Nov. 15 H. J. Tompkins E. Tompkins H.J. Tompkins C. "W. Sopt). 3.9 1.7 .6 H. J. Tompkins .05 456. SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Haines Creeh near Tujunga, CaliJ., for 1917-18. Day. Oct. Nov. Dec. Jan. Feb Mar. Apr. May. June. July. Aug. Sept. 1917. { K. ! j 0.35 .35 .35 .37 .37 .37 .39 .39 .39 .39 .37 .37 .35 .35 .33 .33 .33 .33 .33 .31 .31 .31 .31 .31 .31 .31 .29 .29 .29 .29 .29 .45 .43 .41 .37 .31 .25 1.3 .7 .65 1.5 3.2 4.7 4.2 8.3 2.6 2.1 1.8 1.6 2.0 1.6 1.4 1.4 1.3 1.2 1.2 1.1 1.0 .95 .95 .85 .8 0.27 .27 .25 .25 .23 .23 .25 .25 .27 .27 .25 .23 .23 .23 .23 .25 .23 .23 .23 .23 .23 .22 .22 .22 .20 .20 .20 .22 .20 .18 .8 .8 .75 .7 .7 .7 .65 .65 .6 .6 .5 .5 .47 .45 .45 .45 .43 .43 .41 .39 .37 .35 .35 .35 .35 .35 .33 .31 .31 .29 0.17 .17 .17 .17 .17 ..17 .17 .17 .17 0.17 .17 .17 .17 .15 .15 .15 .15 .18 .17 .17 .17 .17 .17 .17 .17 .17 .17 .17 .17 .17 .15 .29 .31 .31 .31 .31 .31 .31 .31 .31 .29 .27 .27 .25 .23 .23 .23 .23 .23 .23 .23 .23 .23 .23 .23 .23 .23 .23 .23 .23 .23 .22 0.15 .17 .17 .17 .15 .14 .12 .12 .14 .14 .14 .12 .11 .10 a. 10 a. 09 .09 .09 .10 .10 .10 .10 .10 .10 .10 .10 .10 .09 .09 .07 .20 .18 .17 .17 .17 .17 .17 .17 .18 .23 .23 .22 .20 .20 .20 .20 .15 .17 .17 .15 .15 .17 .15 .17 .17 .14 .14 .15 .15 .15 0.10 .10 .09 .09 .09 .09 .09 .09 .07 .07 .07 .09 .07 .06 .06 .05 .05 .05 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .18 .15 .14 .14 .12 .12 .11 .11 .11 .11 .11 .11 .11 .11 .11 .10 .10 .09 .06 .06 .08 .06 .06 .08 .03 .06 .06 .06 .06 .06 .05 0.06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .08 .06 .06 .06 .06 .05 .05 .06 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .05 .04 .04 .04 .04 .04 .04 .04 .04 .04 .04 .04 .04 .04 .05 .06 .08 .08 .06 .06 .05 .05 .04 .04 .03 .03 .03 .03 .03 .03 .03 05 2 i 05 3 1 05. 4 ' .05 5. 1, . . 05 6 ' . 05 7 ! 0.33 .33 .35 .29 .29 .31 .31 .29 .27 .27 .33 .27 .29 .31 .41 .43 .35 .35 .41 .37 .35 .35 .05 8 ! .05 9. . . . i . . 05 10 ' ...... |.... .05. 11 05 12 .05 13 ........ i .05 14 05 15 .05 16 .05 17 .04 18 .04 19 .04 20 .oa 21 .03 22 .03 23 .03 24 .03 25 ...........,...._. .03 26 .03 27. 03 28 .03 29 .03 30 . .03 31 1917-18. 1 .03 .03 .03 .04 .04 .04 .04 .04 .04 .04 .04 .04 .04 .04 .04 .04 .05 .05 .05 .04 .04 .04 .04 .04 .04 .04 .05 .04 .04 .05 .05 .05 .05 .05 .05 .05 .09 .09 .07 .07 .07 .07 .07 .06 .06 .06 .06 .07 .07 .06 .06 .06 .07 .07 .07 .07 .06 .06 .06 .06 .06 .06 .06 .07 .07 .07 .07 .07 .07 .07 .07 .07 .07 .07 .07 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .06 .08 .06 .06 .08 .06 .06 .06 .06 .08 .06 .06 .07 .07 .07 .07 .07 .07 .06 .06 .06 .08 .06 .07 .07 .07 .07 .06 .07 .07 .09 .09 .07 .07 .07 .07 .06 .06 .06 .06 .06 .06 .06 .06 .06 .10 .10 .10 .12 .31 1.4 .37 .45 .6 .55 .5 .47 .03 2 .03; 3 .03 4 .03 5 .03 6 .03 7 . . .03 8 .03 9 .03 10 .03 11 .03 12.. .03 13 .04 14 .05 15 .04 16 .04 17 .04 18 .04 19 .04 20 .04 21 .04 22 .04 23 .04 24 .04 25 .04 26 .04 27 .04 28 .04 29 .04 30. .04 31 a Water-stage recorder not in operation; discharge interpolated. Note.— No gage-height record May 4-8; discharge interpolated. Feb. 21-22 and Mar. 7 and 10 hourly discharges were averaged. LOS AISTGELES RIVEPv BASIN. 457 Monthly discharge of Haines Creek near Tujunga, Calif., for 1917-18. Discharge in second-feet. Run-off (total in acre- feet). Month. Discharge in second-fcet. liun-ofl (total in acre- feet). Month. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. 1917. February 7-28... 0.43 .39 .27 .18 .17 .10 .06 .05 0.27 .29 .18 .15 .07 .05 .05 .03 0.330 .336 .232 .167 .115 .070 ;055 .042 14.4 20.7 13.8 10.3 6.84 4.30 3.38 2.50 1917-18. October 0.05 .09 .07 .07 1.4 4.7 .8 .31 .23 .18 .06 .05 0.03 .05 .06 .06 .06 .25 .29 .22 .14 .05 .03 .03 0.041 .064 .064 .064 .219 1.47 .493 .257 .175 .094 .042 .036 2.52 November December January 3.81 April 3.94 Mav 3.94 February March 12.2 July 90.4 April . . . . 29.3 September May 15.8 10 4 The period o . 76.2 July 5.78 August 2.58 September The year.... 2.14 4.7 .03 .253 183 ARROYO SECO NEAR PASADENA, CALIF. Location. — Near south line of sec. 30, T. 2 N., R. 12 W. (unsurveyed), just below trail crossing at forest ranger station in Angeles National Forest, 1^ miles above mouth of Millard Canyon, 3 miles above Devils Gate, and 5J miles northwest of Pasadena, Los Angeles County. Drainage area. — 16.4 square miles (measured on topographic map). Elevation. — About 1,450 feet above sea level. Records available, — December 1, 1910, to September 30, 1918. Gage. — Gurley graph water-stage recorder installed September 30, 1916, on right bank just upstream from staff gage. Original staff was in two sections fastened to an alder tree on right bank 300 feet southeast of ranger station. Original datum has not been maintained. (See PI. XIV, C.) Discharge measurements. — ^Made from cable 115 feet below control or by wading, Channel and control. — Solid rock, gravel, and boulders; shifts slightly during high water. A concrete dam extending to bedrock was built across channel 15 feet below recorder well in the fall of 1916. There is a notch in the crest 2 feet wide and 1 foot deep. (See PI. XIV, C.) Extremes of discharge. — 1910-1918: Maximum stage recorded, 12.5 feet February 20, 1914 (discharge, 5,630 second-feet); minimum stage recorded, 0.77 foot, Octo- ber 7, 1917 (discharge, 0.07 second-foot). Diversions. — None. Regulation. — ^None. Accuracy. — Stage-discharge relation not permanent; since construction of concrete control the gravel shifts during high water. Rating curves usually well defined for low and medium stages. Staff gage read to hundredths usually twice daily. Daily discharge ascertained by applying to the rating table mean daily gage height read from staff gage; since October 1916, mean daily gage height determined by inspecting recorder graph. Records good for low and medium stages; high-water records fair. 458 SURFACE WATER OF PACIFIC SLOPE, SOUTHERIT CALIFORNIA, Discharge measurements of Arroyo Seoo near Pasadena, Calif., for 1910-1918. Date. 1910. Dec. 1 191 . Keb. 21 Mar. 1 May 2 June 21 Nov. ;-! 3 1912. 1 .Tan. :ii Mat. 17 Apr. 6 8 Bern. 27 Dee. 24 1913. 1 Feb. ft 8 Mar. 5 Apr. ATav 31 1914. 1 Ffth. 7 16 2fi Mar. 12 30 Apr. 13 Mav 4 Jime 2 Nov. 7 1915. Feb. 18 25 Mar. 15 22 Apr. 26 June 15 July 3 Nov. 18 1 1 Made by— W. V. Hardy W.V.Hardy -...do ....do ....do F. C. Ebert.. Lasley Lee... F. C. Eber ....do. ....do. .do., .do.. F. C. Ebert ....do.. ....do.. ....do.. ....do.. ....do.. F. C. Ebert ....do... ....do... ....do... ....do... ....do.... ....do... ....do... ....do... F. C. Ebert, ....do.. ....do.. ....do.. ....do-. ....do.. ....do.. ....do.. Gage 1 eight. Feet. 3.44 3.78 3.85 3.47 3.30 3.14 3.14 3.24 3.62 3.36 3.10 3.02 3.23 3.20 3.81 3.51 3.27 3. IS 3. 15 3.93 3.74 4.50 3.97 3.81 3.58 3. .55 3.38 3.25 3.72 3.84 3.56 3.46 3.34 3.22 3.12 3, Dis- charge. Sec.-ft. 1.4 13 4.8 2.2 20 2.6 34 14 162 40 29 14 13 7.3 2 7.1 4.0 ! 1916. Jan. 12 22 Feb. 10 14 Mar. 2 30 Apr. 7 20 May 4 29 June 26 July 15 Oct. 26 1917. Jan. 5 20 Feb. 17 21 28 Mar. 6 30 Apr. 14 25 May 13 29 Au£?. 27 Oct. 16 Dec. 21 1918. Jan. 22 Feb. 21 22 Mar. 7 16 23 30 Apr. 13 May 6 10 June 5 21 July 22 Made by— F.C. Ebert... do ....do .--do -...do do-. H. J. Tompkins. do ....do J. a Dort... H. J. Tompkins. do do H. J. Tompkim, do....... do .....do J. C. Dort... H- J. Tompkins do J. C. Dort.. H. J. Tompkins .....do do ,...-do E. Tompkins-. H. J. Tompkins C. W. Sopp do do E. Tompkins.... C. W, Sopp do do H, J. Tompkins. do C. W. Sopp H. J. Tompkins. C. W. Sopp H. J. Tompkins. Feet. 3.55 4.18 3.91 3.80 3.73 3.58 3.53 3.47 3.37 3.29 3.12 3.08 1.28 1.92 2.18 1.98 2.60 2.24 2.07 1.86 1.83 1.77 1.70 1.56 .94 1.12 2.50 2.90 3.64 2.40 2.15 2.00 1.92 1.72 1.73 1.56 1.50 1.35 Sec.-ft. 14 64 35 25 21 14 13 9.3 7.7 4.8 2.4 1.4 2.2 8.( 26 31 21 10 6.2 6.0 4.8 4.7 1.0 71 129 578 46 24 14 10 4.8 4.9 2.3 1.2 .34 LOS ANGELES RIVER ifeASIN. 459 Daily discharge, in ^second-feet, of Arroyo Seco near Pasadena, Calif, for 1910-1918. '■ Day. Dec. Apr. May. June. July. Aug. Sept. 1910-11. 1 1.4 1.6 1.7 1.8 2.0 2.1 2.1 2.0 2.1 2.0 2.1 2.0 2.3 2.8 3.9 4.2 4.2 4.6 4.6 5.0 5.0 5.6 5.6 6.0 7.0 7.0 7.5 . 7.5 7.0 7.0 7.5 63 62 62 60 ^4 44 39 34 25 25 24 22 22 21 20 19 18 16 15 14 14 14 14 14 13 21 21 21 20 20 19 19 18 14 13 11 10 9.0 8.6 8.6 8.1 8.1 7.6 8.6 8.6 8.6 8.6 8.6 8.1 8.0 7.9 7.9 7.8 7.7 7.6 7.5 7.4 7.4 7.3 7.2 7.2 7.2 6.8 6.8 6.3 5.8 5.4 5.4 5.0 5.0 4.5 4.2 4.0 4.0 4.0 4.0 3.8 3.8 3.8 3.8 3.8 3.8 3.5 3.5 3.5 3.5 3.2 3.2 3.2 3.2 3.2 3.2 3.0 2.8 2.5 2.5 2.5 2.2 2.0 1.8 1.7 1.6 1.5 1.5 1.5 1.5 1.5 1.4 1.4 1.4 1.5 1.4 1.4 1.4 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.4 1.3 1.3 1.3 1.3 1.3 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 l.S 1.2 1.1 1.2 1.1 1.0 1.0 .8 .8 .8 .8 .8 .8 .8 .7 .6 .6 .6 O.S 2 .s 3 .6 4 .3 5 .5 6 .5 7. .5 8 .5 9 .6 10 .6 11 .6 12 .6 13 .6 14 .6 15 .6 16 .6 17 .6 18 .6 19 .6 20 .8 21 .6 22 . . .. .6 23 .6 24 .6 25 .7 26 .7 27 .7 28 1.0 29 60 30 31 31 Note. — Daily discharge determined from two fairlv well defined rating car\'es applicable as follows: Dec. 1 . 1910, to Mar. 10, 1911 ; and Mar. 11 to Sept. 30, 1911. No record during Jan. 1 to Mar. 31 , 1911. Dis- charge interpolated on days for which no gage height is given dui'ing Dec, 1910, and Apr. 1 to Dec. 31 , 1911 . Day. Oct. Nov. Dee. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1911-12. 1 al7 3.2 3.0 2.8 2.0 1.9 2.2 02.0 1.9 1.8 1.7 1.5 1.5 1.9 al.6 1.4 1.4 1.4 1.4 1.4 1.5 1.5 1.6 1.7 1.7 1.8 2.0 2.5 2.2 2.0 2.2 2.2 2.5 2.0 1.9 «1.9 1.9 1.8 1.8 1.7 3.0 2.5 02.4 2.2 2.0 1.9 1.9 1.8 1.8 1.8 1.7 1.6 1.5 1.5 1.5 1.4 1.4 1.5 1.5 1.6 1.5 1.6 1.6 ol. 6 1.7 1.6 2.2 2.0 2.0 2.0 a2.0 1.9 1.8 1.8 1.8 1.7 1.6 01.6 1.7 1.7 1.7 1.7 1.6 al. 6 «1.6 al.6 flL5 «1.5 01. 5 «1.5 «1.5 j 1 "14 14 14 14 13 13 12 ol2 12 12 12 12 11 10 10 9.5 9 08.7 as. 4 8.1 7.2 6.8 6.8 6.3 a6.0 5.8 5.8 5.4 5.4 5.4 5.4 5.0 4.5 4.5 4.2 4.2 4.2 4.0 3.8 3.5 3.5 3.5 3.2 3.0 2.8 2.5 2.2 2.0 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.0 .9 .8 .8 .0 0.6 .6 .6 .6 .6 .0 .6 .6 .6 .6 .6 .6 !6 .6 .5 .5 .5 .5 .5 .5 \l «.5 a. 5 a. 6 0.6 .6 .5 .6 .6 0.5 2 i.7 1.7 1.8 1.8 1.8 1.9 1.8 1.8 1.8 1.8 1.9 .6 3 .5 4 .5 6 1 1 .0 7 .0 8 .5 9 1 .6 10 .5 11 ' .5 12 .6 13 6 14 .5 15 j 1 .5 .5 16 i 17... 1 1 .5 18 .5 19 i ^ i .5 20 1.5 1.5 .5 21 ! .5 22 .5 23 1. 5 .5 24 1.5 .6 25 15 al5 15 15 15 26 1 i 27 1.5 1.5 28 29... 30 31 3.0 j 15 a Estimated. Note.— Daily discharge determined from a faiily well defined rating curve for 1911 and itoxa defined rating curve for low water for 1912. No estimates made for gage heights over 3.6 feet. a well 460 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Arroyo Seco near Pasadena, Calif., for 1910-1918 — Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1912-13. 1 0.3 .6 .8 2.8 1.8 1.0 .9 .9 .8 .9 .0 .5 .6 .5 .4 .4 .4 .4 .4 .5 .6 .5 .6 .6 .5 .G .5 .5 .6 .5 .5 0.5 .5 .6 .6 .6 .6 .6 .5 .6 1.0 .8 .8 .6 .6 .G .6 .5 .5 .6 • G .7 .7 .7 .8 .8 .8 .8 .7 .7 .8 0.8 .8 .6 .7 .7 .6 .6 .6 .8 .8 .7 .7 .6 .6 .8 .7 .6 .6 .6 .0 .6 .6 .6 .6 .6 .5 .5 .6 .6 .6 .6 0.7 .7 .7 .6« .5^ .6 .6 .8 1.2 1.6 1.0 .9 .9 .9 72 16 30 8.2 5.0 5.0 6.0 5.0 5.0 5.0 5.0 4.8 4.5 4.3 4.0 3.8 3.8 3.8 3.8 3.8 4.2 4.6 5.0 5.0 5.0 4.4 3.8 3.4 2.9 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.2 2.5 2.5 2.5 2.5 2.5 2.5 2.4 2.2 2.2 2.2 2.2 2.2 2.2 2.4 2.4 2.2 2.2 2.2 2.4 2.2 2.4 3.0 2.4 2.2 1.9 1.9 2.0 2.0 '2.2 2.2 1.9 2.0 2.0 2.0 1.8 1.9 1.6 1.3 1.3 1.3 1.0 1.0 1.0 1.2 r.3 1.0 1.0 1.0 1.0 1.0 1.8 3.8 2.5 1.6 1.0 1.2 1.2 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 .9 .7 .7 .8 .7 .7 .5 .8 1.0 1.0 1.0 1.0 1.0 - 1.0 1.0 1.2 1.2 1.2 1.0 .9 .8 .8 .9 .9 .8 .8 .8 .7 .5 .3 .3 .3 .3 .3 .3 .3 .2 .2 .2 .2 .2 .2 .2 .2 .2 7 2 1 3 1.0 4 .7 5 .3 6 .2 7 .2 8 . .3 9 .2 10 .2 11 .2 12 13 . 14 15.. 16 17 . 18 19 20 . 21 22 23 24.. . . .2 25 . . .2 26 .2 27 . . .2 28 .2 29 .2 30 .2 31 Note.— Daily discharge determined from two fairly well defin.ed rating curves applicable Oct. 1, to Jan. 15, and Jan. 16 to Sept. 30. Discharge estimated Sept. 12 to 23; discharge interpolated for other days for which record is not given. 7.. 8.. 9.. 10.. 12.. 13.. 16.. 17., 18., 21.. 22.. 23.. 24., 25.. 29.. 80.. .2 1.5 2 11 60 87 21 17 5.5 3 1.5 .2 1.5 2 8 51 95 21 16 6 2.5 1.5 .2 1.5 2 5.5 38 104 20 15 6.5 2.5 1.5 .2 1.5 2 4 36 104 20 13 7 2.5 1.5 .2 2 2 3 32 92 20 12 7 2.5 1.6 .4 2 2 2.5 29 92 19 12 7.5 2.5 1.5 .4 2 2 2.5 24 72 19 11 8 2.5 1.5 .4 2 2 2.5 23 62 19 11 8 2.5 1.5 .4 2 2 2.5 21 54 19 11 8 2.5 1.5 .4 2 2.5 2.5 20 54 18 10 8 2.5 1.5 .4 2 2.5 2.5 18 54 18 10 7.5 2.5 1.5 .4 4.5 2.5 2.5 16 47 17 10 7 2.5 1.6 .4 20 2.5 2.5 15 47 16 9 6.5 2 1.5 .3 12 3 4 14 33 15 9 6 2 1.5 .4 5.5 3 24 14 32 15 9 5.5 2 1.6 .4 4 3 67 14 31 14 9 5.5 2.5 1.5 .5 3 4 160 14 31 13 8.5 5 2.6 1.6 .4 7 4 497 684 27 13 8 5 2.5 1.6 4 27 4.5 39 712 27 12 7.5 4.5 2.5 1.5 .4 20 5 19 3,690 27 12 7.5 4.5 2 1.6 .4 8 5.5 13 1,820 26 17 7 5 2 1.6 .5 4.5 5.5 10 '852 26 21 7 5 2 1.6 .6 3.5 6 8 528 25 18 7 5 2 1.6 .7 2.5 6.5 19 349 24 18 7 4.5 2 1.5 .7 2 7 386 230 24 17 6 4.5 2 1.5 .7 2 7.5 1,750 145 24 15 6 4 2 1.6 .8 2 8 500 99 24 13 6 3.5 2 1.6 .9 2 8.5 257 79 24 11 6 3 2 1.6 1 2 9.5 132 27 18 6 3 1.5 1.5 1 2 15 87 27 18 5.5 2.5 1.5 1.5 1.5 16 65 27 5.5 1.5 2 2 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2 2 2 2 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2 2 2 Note.— Discharge determined from three rating curves fairly well defined below 400 second-feet. Daily LOS ANGELES EIVEH'BASISr. 461 in second-feet, of Arroyo Seco near Pasadena, Calif., for 1910-1918 — Con. Day. Oct. Nov. Dee. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1914-15. 1 1 1 1.5 1.5 1.5 1.5 1 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2 2 1.5 1.5 1.5 1.5 1.5 1.5 2.5 2.5 2.5 2.5 2 1.5 .8 .8 .9 .8 .8 .7 .5 .8 .3 .3 .2 .2 .3 .3 .3 .3 .3 :i .3 .3 .3 .4 .5 1 2 1.5 1 1 1 1 1 1.5 3.5 3.5 L 2.5 2.5 4 28 30 32 31 33 41 42 36 30 25 17 11 6.5 3.5 2.5 1.5 1.5 3 3.5 12 349 223 77 22 117 435 72 26 21 18 16 200 238 130 62 50 41 20 24 23 22 21 26 23 23 22 32 37 ' 26 20 22 30 29 26 25 23 23 22 21 19 18 17 16 16 16 15 15 14 14 14 13 13 12 12 11 11 11 11 16 12 11 10 10 10 10 11 12 10 9 9 9 9 9 8.5 9 10 9 8 8 7.5 7 6.5 7.5 8 8 7.5 7.5 7.5 7.5 10 17 17 17 16 17 21 22 18 16 15 14 13 12 12 12 11 11 11 11 10 10 9.5 9 9 9 9 8.5 8 8 8 7.5 7.5 7.5 7 7 6.5 6.5 6 6 6 6 6 6 6 6 5.5 5.5 5.5 5 5 4.5 4 3.5 3.5 3.5 3.5 3 3 3 2.5 2.5 2.5 2 2 2 2 2 2 2 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 .9 .9 .8 .8 .8 .8 .8 .8 .8 .8 .8 .8 .7 .7 .7 .6 .7 .6 .6 .5 .5 .8 .9 .8 .8 .8 .8 .7 .7 .7 .8 2 .8 3 .. .8 4 .8 5 .8 6 . .8 7 .8 8 .8 9 . • .8 10 .8 11 .8 32 13 . . g 14 .8 15 .8 16.... .8 17 .8 18 .8 19 .8 20 -8 21 22 .8 .8 23 .8 24 .9 25 .9 26 .9 27 .9 28 .9 29 .9 80 .8 31 Note. — Discharge determined from two rating curves as follows: Oct. 1 to Feb. 3, poorly defined; Feb. 4 to Sept. 30, well defined between 1 and 200 second- feet. 1915-16. 1 .8 .8 .8 .'s .8 .8 ;l .8 .8 .8 .8 .8 .8 .8 .8 '.8 .8 .8 .8 .8 .8 .8 .9 3 2 2.5 11 8.5 9.5 10 11 12 11 11 11 11 11 11 10 10 10 10 10 10 10 10 10 9 8 8 8 8 7.5 8 8.5 9 9 9 9 9 6 7 7 6.5 6 5.5 5.5 6 6 5.5 5.5 \ 5.5 8 6.5 6 5,5 5 6 6 5 5 5 5 5 5 4.5 4.5 4 4 4 3.5 3.5 3 3 3.5 3 3 3 2.5 2.5 2.5 2.5 2.5 3 3 3 2.5 2.5 2.5 2.5 2.5 2.5 2 2 1.5 1.5 1.5 1.5 L5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 .9 1 .8 0.8 .8 .8 .9 .6 .6 .8 .8 .8 1.5 .8 .8 .7 .6 .7 .7 0.8 2 21 3 4 6 7 8 9 3.5 3 3 2 2 2 2 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 10 35 11 12 14 13 14 25 15 16 17 1,930 18 19 20 21 22 ....... 58 42 51 65 23 24 25 .... '.'. 26 ... 27 28 29 . .. 30 14 31 Note.— Discharge estimated mostly by interpolation, Nov. 14-17, 21, 28-30; Apr. 1, 3, 4, 11-14, 21-23,5 and May 9. Discharge July 6-13 estimated from observers' notes and rainfall record. 462 SURFACE WATEE OF PACIFIC SLOPE, SOTJTHEIlJSr CALIFORNIA. Daily discharge, in second-feet, of Arroyo Seco near Pamdena. Calif. ^ for 1910-1918 — Con. Bay. Oct. Not. Dec. Jan. Feb. Mar. Apr. May. Jtme. July. Aug. Sept. 1916-17. 1 3.1 40 15 6.5 4.5 10 9 6 5 8 8.5 6.5 5.5 4.8 4.5 3.6 3.3 3.0 2.9 2.9 2.6 2.7 2.9 2.9 2.2 2.2 2.2 2.3 2.5 2.4 2.2 2.1 2.2 2.2 2.7 4.3 3.5 3.1 3.0 2.9 2.8 2.5 2.6 2.7 2.6 2.7 2.7 2.7 2.6 2.6 2.5 2.3 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.9 8 6.5 4.3 3.6 3.1 2.9 2.9 2.8 2.7 2.7 2.6 2.6 2.5 2.5 2.5 2.5 2.5 2.6 2.7 2.7 2.9 272 59 26 12 10 9 9 8.5 8.5 8 10 9 8.5 8 8 7.5 7.5 7 7 7.5 9 8 8 10 10 12 40 30 25 21 20 18 17 14 13 12 12 12 12 11 11 11 10 10 10 10 9.5 9 9 9 9 9 9 8.5 8 14 10 10 34 72 120 66 46 63 50 40 36 33 30 26 32 21 20 19 18 20 19 17 16 16 16 16 14 14 13 13 12 12 12 12 11 11 11' 11 10 10 10 10 0.5 9.5 8 7.5 7.5 7 7 I 8 7.5 7 6.5 6.5 7 8 8 7,5 7 6.5 6 6 6 6 5.5 6 6 7 6.5 6 6 5.5 5.5 5.5 5 5 5 5.5 5.5 5.5 5.5 5 5 5 5 4.9 4.9 7 6 5 5 5 5 5.5 5.5 5 5 5 4.7 4.8 4.8 4.2 3.7 3.6 3.6 3.6 3.4 3.2 2.9 2.9 2.7 2.7 . 2.6 2.2 2.0 1.6 1.4 1.1 1.0 1.0 1.1 1.1 1.1 1.1 1.0 .9 1.0 1.0 .9 .9 1.0 0.8 .8 .8 .7 .7 .7 .7 .6 .6 .6 .5 .6 .6 .6 .7 .7 .7 .6 .6 .6 .5 .5 .5 .5 .5 .5 .5 .4 .4 .4 .4 0.4 .4 .5 .5 .5 .5 .4 .4 .4 .4 .4 .4 .4 .5 .5 .4 .4 .4 .3 .3 .3 !3 .3 .3 .3 .3 .2 .2 .2 .2 0.2 2 .1 3 ,. .1 4 .1 5 .1 6 .1 7 .2 8 .2 9 .2 10... .1 11 .1 12 .1 13 .1 14 .1 15 .1 16... .1 17 .1 18 .1 19 .1 20 .1 21 .2 22 .S 23 .2 24 .2 25. .2 26 .2 27. - .. .2 28 ,1 29 .1 30 .1 31 Note.— Water-stage recorder not in operation Dec. 11-14 and Sept. 21-30; dischaige interpolated Dec. 24, hourly discharges averaged. 16.. 17.. 18.. 19.. 20,. 27.. 28.. 30.. 31.. 1.0 .9 1.0 1.0 1.0 1.0 1.0 1.3 1.1 1.1 1.1 1.1 1.0 1.1 1.0 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.5 1.1 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.7 3.4 2.4 3.9 13 246 65 32 172 342 314 160 6.5 6.5 6.5 7 6.5 5.5 4.9 4.4 4.2 4.2 4.4 4.7 4.7 5.5 5.5 5.0 4.7 3.9 3.7 3.6 3.4 3.6 3.7 3.7 3.7 3.6 3.6 3.6 3.4 3.4 3.4 3.4 3.2 2.9 2.6 2.5 2.5 2.4 2.3 2.2 2.2 1.9 1.8 1.9 1.8 1.7 1.4 1.4 1.5 1.5 1.4 1.3 1.3 1.1 1.0 1.1 1.4 1.3 1.2 1.1 1.0 .2 .2 .2 .2 .2 .2 .2 .2 1.1 .7 .6 .4 .4 HoTE.— No gage-height record Oct. 1-5, 18, 19, 26, and Sept. 24-27; discharge estimated. Mar. 7 and 10 hourly disciiarges were averaged. LOS AJN^GELES KIVER BASIIT. 46S Monthly discharge of Arroyo Seco near Pasadena, Calif., for 1910-1918. {Drainage area, 16.4 square miles.] Discharge in second-feet. Per square mile. Run-off. Depth in inches on drainage December. . April May , June July August September . 7.5 63 19 7.2 3.2 1.3 13 7.2 3.2 1.4 4.10 27.7 9.55 4.37 1.78 1.04 3.60 0.250 1.69 .582 .266 .109 .003 .220 The period. 1911-12. October November December May 25-31 June July August September 1-24 17 3.0 2.2 15 14 5.4 October., November December January 1-18. April 1912-13. June July August September . 2.8 1.0 .8 72.0 5.0 3.0 3.8 1.2 1.2 1.0 October November . . December. January February . . , March April May June July August September . 16 1,750 3,690 104 21 17 8 3 The year.. October November . . December. . January February . . March. .... . April May June July August September . 2.5 2.5 42 349 435 30 17 22 7.0 2.0 1.0 The year 1915-16. October . November . April May Jmie July August September. 3.5 12 1.4 1.4 1.5 15 5.4 .6 .5 .5 2.38 1.86 1.70 15.0 9.94 2.77 .56 .53 .145 .113 .104 .915 .606 .169 .034 .032 .3 .5 .5 .5 2.5 1.9 1.0 .5 .2 .09 .GO .64 7.66 4.08 2.36 1.62 .94 .56 .25 .042 .040 .039 .467 .249 .144 .099 .057 .2 L5 2 2.5 14 24 11 5.5 2.5 1.5 1.5 1.5 .51 5.12 4,82 132 344 46.8 16.9 9.18 5.62 2.23 1.52 1.77 .031 .312 .294 8.05 21.00 2.85 1.03 .560 .343 .136 45.5 1.0 1.0 16 10 6.5 7.5 2.0 1.0 .5 .67 12.9 22.5 64.1 16,6 9.30 11.9 4.75 1.37 .041 .787 1.37 3.91 1.01 .567 .726 .290 .084 .046 .050 726 7.5 5 .76 1.72 9.73 6.16 3.07 1.36 .89 a .83 .046 .105 .376 .187 .054 ' .051 0.29 1.89 .67 .30 ,13 ,07 .25 ,17 .13 .12 .24 .68 .19 .04 .03 .04 .04 .31 .28 .17 .11 .07 .04 .02 ,04 ,35 ,34 9.28 21.87 3.29 1.15 .65 .38 .16 ,11 .05 .91 1.58 4.07 1.16 ,63 ,84 .32 .10 .05 464 SURFACE WATER OF PACITIC SLOPE, SOUTHERN CALIFORNIA. Monthly discharge of Arroyo ISeco near Pasadena, Calif., for 1910-1918 — Continued. Discharge in second-feet. Run-off. Month. Maximum. Minimum. Mean. Per square mile. Depth ixi inches on drainage area. Total in acre-feet. 1916-17. October 40 4.3 272 40 120 33 9.5 7 4.2 .8 .5 .3 2.2 2.1 2.2 7 8 10 5.5 4.7 .9 .4 .2 .1 5.80 2.57 15.4 12.9 25.5 16.0 7.05 5.25 2.02 .590 .365 .140 0.354 .157 ,939 .787 1.55 ,976 .430 ,320 .123 ,036 .022 ,0085 0.41 .18 1.08 .91 1.61 1.13 .48 .37 .14 .04 .03 .01 357 November i53 December 947 793 February 1,420 984 March April 420 May 323 120 July 36.3 22.4 September 8.3 The vear 272 .1 7.71 .470 6.39 5,580 1917-18. October .4 1.0 1.0 1.3 107 342 14 5.5 2.9 1.4 .5 1.1 .1 .2 .8 .8 1.0 6 5.5 3.1 1.0 .2 .2 .2 .213 .540 .890 1.02 11.6 62.7 9.08 3.97 1.71 .561 .284 .403 .013 .033 .054 .062 .707 3.82 .554 .242 .104 .034 .017 .025 .01 .04 .06 .07 .74 4.40 .62 .28 .12 .04 .02 .03 13.1 32.1 54.7 January . . 62.7 644 March 3,860 April 530 May 244 102 July 34.4 17.5 24.0 The year 342 .1 7.77 .474 6.43 5,620 EATON CREEK NEAR PASADENA, CALIF. Location. — Near line between sees. 2 and 11, T. 1 N., R. 12 W., at mouth of canyon just above Mount Wilson toll bridge, about 4 miles northeast of Pasadena, Los Angeles County. Drainage area.' — 6.5 square miles (measured on topographic map.) Records available.^ — March 1 to September 30, 1918. Gage. — Gurley graph water-stage recorder with temporary well and house, on left bank just above toll bridge. Discharge measurements. — Made by wading near gage. Channel and control. — Gravel and boulders, fairly permanent. (See PI. XIV, B, p. 423.) Extremes of discharge. ^ — Maximum stage, from water-stage recorder, 3.47 feet at 4 a. m. March 11 (discharge, 168 second-feet); no flow May 13 to September 30. Diversions. — The Precipice Canyon Water Co. diverts above the station; see monthly discharge, page 465. Regulation.^ — None. Accuracy.— Stage-discharge relation permanent during period. Rating curve fairly well defined throughout. Daily discharge ascertained by applying to the rating table mean daily gage height determined by inspecting recorder graph except on March 7, when hourly discharge was averaged. Records good. LOS ANGELES RIVER BASIN, 465 Discharge measurements of Eaton Creeh near Pasadena, Calif., for the year ending Sept. 30, 1918. Date. Made by- Gage height. Dis- charge. Date. Made by— Gage height. Dis- charge. Feb 22 C W. SoBp Feet. 1.98 1.37 1.12 .88 2.44 1.66 Sec-ft. 41 8.1 2.3 .55 76 18 Mar. 23 29 Apr. 5 12 20 26 H. .T. Tomokins do.../. Feet. 1.48 1.24 1.20 1.10 .98 .98 Sec-ft, 10 25 E. Tompkins 4.2 Mar 1 C W. Sopp do . . do 3.1 4 Ebertand Sopp Sopp and Tompkins.- . . H. J. Tompkins 2.3 11 do .85 16 do 1.2 Daily discharge, in second-feet, of Eaton Creeh near Pasadena, Calif., for the year ending Sevt, 30, 1918. Day. 7.. 8.. 9.. 10.. Mar. Apr. May. 2.3 3.6 0.25 1.9 3.6 .1 1.2 3.4 .15 .6 3.4 .3 .7 3.4 .35 4.6 3.3 .25 60 3.1 .15 38 2.8 .05 19 2.4 .05 36 2.3 .04 Day. Apr. May. 0.02 .01 13 12 11 8.5 May. Note. — Gage-height record started Mar. 1. Discharge Feb. 22 and 24 same as measurements made on those dates. No flow May 13 to Sept. 30. Monthly discharge of Eaton Creeh near Pasadena, Calif., for the year ending Sept. 30, 1918. Discharge in second-feet. Run-off (total in acre- feet). Month. Discharge in second-feet. Run-ofl (total Month. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. in acre- feet). March 105 3.6 .35 .00 .00 0.6 .4 .00 .00 .00 20.9 1.87 .055 .00 .00 1,290 111 3.38 .00 .00 August 0.00 .00 0.00 .00 0.00 .00 00 Anril September The period. . 00 M^y June 1,400 July Note. — Discharge of Precipice Canyon Water Co.'s diversion should be added to above table to give total run-oft" of Eaton Creek. For monthly discharge of this diversion see following table. Monthly discharge of Precipice Canyon Water Co.'s, diversion near Pasadena, Calif, for the year ending Sept. 30, 1918. Discharge in second- feet (mean). Run-off (total in acre-feet). Discharge in second- feet, (mean). Run-off (total in acre feet). March., April.. May — Jmie..., July... 2.40 2.00 2.80 119 172 August September. . 0.54 .51 33 30 The period . Note.— Table compiled by U. S. Geological Survey from records submitted by W. I. Allen, manager of Precipice Canyon Water Co. 142131°— 21— wsp 447- -30 466 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORFIA. SANTA ANITA CREEK NEAR SIERRA MADRE, CALIF. Location.— In SW. i NE. l sec. 10, T. 1 N., R. 11 W., at head of what are known locally as "Hermit's Falls, " about 4 miles northeast of Sierra Madre, Los Angelea County. Drainage area. — 10.5 square miles (measured on topographic map). Elevation. — ^About 1,400 feet above sea level. Records available. — July 31, 1916, to September 30, 1918. Gage. — Stevens water-gage recorder on right bank of pool at head of Hermit's Falls. (See PL XI, C, p. 236.) Discharge measurements.— -Made from cable 300 feet below gage or by wading at lower end of gage pool. Channel and control. — Channel at gage is pool in bedrock; is rough and steep above and below pool. Both banks are high, clean, and not subject to overflow. Control, which is bedrock, is the same for all stages and is permanent. Zero flow, stage 0.47 foot. Extremes of discharge. — 1916-1918: Maximum stage from water-stage recorder, 4.75 feet March 11, 1918 (discharge, 248 second-feet) ; minimum stage from water- stage recorder, 0. 74 foot September 11-12, 1918 (discharge, 0. 3 second-foot). Diversions. — None above. Regulation. — None. Accuracy. — Stage- dischai-ge relation permanent. Rating curve well defined. Water- stage recorder not operating satisfactorily during November and December, 1916, and January, 1917. Mean daily gage height determined by inspecting recorder graph. Daily discharge ascertained by applying mean daily gage height to rating table. Records fair for period when water-stage recorder was not operating satisfactorily; remainder of record good. Discharge measurements of Santa Anita Creeh near Sierra Madre, Calif., for 1916-1918.. 1916. Apr. 13 18 May 3 24 June 16 29 Aug. 24 Sept 24 Oet. 24 1917. Feb. 3 Made by— H. J. Tompkins. . .do.. -do.. J.C.Dort do H. J. Tompkins. . do do do H. J. Tompkins. do.. do.... do.. ....do.. ....do.. Txage height. 1.22 1.59 2.89 2.85 2.32 2.31 Dis- charge. See. ft. 14 15 10 7.8 4.4 3.8 1.7 1.8 2.9 5.2 18 50 1917, Mar. 2 Apr. 18 Dec. 22 1918. Jan. 15 Feb. 26 Mar. 4 27 Apr. 9 June 4 July 6 Aug. 2 Sept. 3 Made by— J. C.Dort H. J. Tompkins. . do Tompkins and Sopp. . C. W.Sopp H. J. Tompkins do do do do do do Gage Dis- height. charge. Feet. 1.74 1.22 1.65 1.14 1.50 1.30 1.05 .91 .80 .77 Sec.-ff. .5 .3 19 15 1.3 .44 .55 Dailif discharge, I second-feet, of Santa Anita Creeh near Sierra Madre, CaUf., for 1916- 1918. Day. Aug. Sept. Day. Aug. Sept. Day. Aug. Sept. 1.. 1916. 2.3 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.3 L7 1.7 1.8 L8 L8 L9 1.9 l.R 1.8 L8 11. 12. 13. 14.. 15. 16. 17. 18 1916. 2.3 2.3 2.3 2.3 2.3 2.4 2.4 2.5 2.3 2.4 1.7 1.6 1.6 LS 1.6 1.6 1.6 1.6 1.6 1.6 21. 22. 23. 24. 25.. 26. 27. 28. 29. 30. 31. 1916. 2.4 2.3 2.1 1.9 1.7 1.7 L7 1.7 1.7 1.7 1.7 - 1.6 2 «1.7 3 .,. oL7 4 1.8 5 1.8 6 L9 7 1.7 8 X.ft 9 19.. 20.. 1.6 10 _ _ 3.1 o No gage-height record, discharge interpolated. LOS ANGELES RIVER BASIN. 467 Daily discharge, m second-feet, of Santa Anita Creelc near Sierra Madre, Calif. ^ for 1916-1918~Coniinued. Day Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1916-17. 1 7 32 8 5 4.5 9 5.5 4.7 4.3 6 4.7 4.3 4.2 4.2 3.8 3.0 2.9 3.0 2.9 2.8 2.8 3.0 3.0 2.9 2.5 2.5 2.6 2.9 2.9 2.8 2.8 2.8 2.8 2.8 2.8 3.0 3.0 2.8 2.8 2.8 2.8 2.8 3.0 2.8 2.8 2.7 2.7 2.6 2.6 2.5 2.5 2.4 2.4 2.3 2.3 2.2 2.2 2.1 2.1 2.0 2.0 2.1 2.5 6.5 3.6 2.9 2.8 2.8 2.8 2.7 2.7 2.7 2.6 2.6 2.6 2.6 2.5 2.5 2.5 2.4 2.4 2.4 2.4 3.0 100 25 13 7.5 6.5 6 5.5 5.5 5.5 5.5 5.5 6.5 6 5 4.5 4.5 4.0 4.0 4.5 4.5 5 4.7 6 5.5 5 7 24 20 15 12 11 10 9 8.5 8 8 7.5 6.5 6.5 6 5.5 5.5 4.8 4.8 4.7 4.5 4.5 4.5 4.3 4.3 4.3 4.2 4.0 3.8 6.5 5.5 5.5 16 43 86 56 39 56 48 40 34 29 25 22 20 19 17 16 15 17 16 15 13 13 13 12 11 10 9.5 9.5 9.5 9.5 8.5 8 8 7.5 7 7 7 7 6.5 6.5 6 6 5.5 5.5 5.5 5.5 7 6.5 6 5.5 5 5 9 7 5.5 5.5 4.7 4.3 4.3 4.5 4.3 4.3 4.5 4.8 5.5 5.5 4.7 4.5 4.3 4.3 4.3 4.2 3.8 4.0 4.5 4.5 4.3 4.3 4.2 4.2 3.8 3.6 3.6 3.6 3.6 6.5 4.8 4.2 4.3 4.7 4.7 4.3 4.0 3.8 3.8 4.0 4.0 3.6 3.2 3.0 3.3 3.2 3.0 2.9 2.9 2.8 2.8 2.8 2.6 2.4 2.3 2.1 1.9 1.7 1.7 1.8 1.9 1.9 1,9 1.9 1.9 1.8 1.8 1.7 1.6 1.6 1.5 1.5 1.5 1.4 1.6 1.7 1.7 1.6 1.3 1.3 1.3 1.4 1.3 1.3 1.2 1.2 1.0 1.0 1.0 1.0 1.0 1.0 1.1 1.1 1.1 1.1 1.0 l.l 1.1 1.0 .9 1.0 .9 .8 .8 .8 .8 .8 .8 .7 .8 .8 .8 .8 .8 .8 .8 '.8 .8 .8 .8 .8 .8 .8 .8 .8 .6 .6 .6 0.6 2 . .8 3 .6 4 .6 5 .6 <) .5 7 .5 8 .5 9.. .5 10 .4 11 .4 12 .4 IS .5 14 . . .5 15 .5 16 . 17 18 .. . 19 20 21 22 . .. 23 24 25 26.. . 27 28 29 30 .5 31 . Note.— No gage-height record Oct. 31 to Nov. 28; Dec. 7 to Jan. 12; Jan. 25-29; and Sept. 19-27. Dis- charge for these periods estimated from records of flow on nearby streams, except Sept. 19-27 which was interpolated. 12.. 13.. 14.. 15.. 16.. 17.. 18.. 19.. 20.. 21.. 22.. 23.. 24.. 25.. 26.. 27.. 30.. 31.. 6.4 5.0 4.5 4.0 4.8 13 114 154 122 8.1 7.8 7.5 7.5 8.4 7.2 7.0 5.6 5.0 5.0 4.8 5.0 5.3 5.6 5.6 5.3 5.3 5.3 4.8 4.3 4.0 4.0 4.3 4.5 4.5 4.3 4.3 4.3 4.2 4.0 3.8 3.5 3.3 3.5 3.6 3.6 3.3 3.2 3.2 3.2 3.2 3.0 3.0 3.2 3.3 3.0 2.9 2.8 2.6 2.5 2.6 2.3 2.1 2.1 1.9 1.9 1.7 1.7 1.8 1.9 1.6 1.5 1. 2 1 Note.— No gage-iieiglit record Aug. 14 to Sept. 2; discharge interpolated. 468 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA, Monthly discharge of Santa Anita Creek near Sierra Madre, Calif., for 1916-1918. Discharge in second-feet. Maxi- Mlai- mum. mum. Urni-off (total acre- feet). Discharge in second-feet. Maxi- Mini- mum, mum. Run-ofl (total acre- feet). 1916. August September.. The period . 1916-17. October November December January February March April May Jime July August September The year. . 2.5 3.1 2.11 1.75 130 104 32 3.0 100 24 86 29 9 7 3.6 1.7 1.0 .6 2.5 2.0 2.1 4.0 3.8 7.0 4.3 3.6 1.5 .9 4.92 303 2.58 154 7.54 464 7.72 475 18.2 1,010 12.7 781 5.51 328 4.31 265 2.32 138 1,24 76.2 .78 48.0 .48 27.4 1917-18. October November. . . December... January February March April May Jime July August September. . . The year. 1.0 1.3 .8 1.1 82 154 11 4.5 2.8 1.5 0.5 .4 2.9 1.4 .5 .4 .3 0.64 .76 .75 .86 8.07 36.1 7.09 3.64 1.97 .87 .63 .55 5.16 100 5. 62 4, 070 39.4 45.2 46.1 52.9 448 5,220 422 224 117 53.5 38.7 32.7 LITTLE SANTA ANITA CREEK NEAR SIERRA MADRE, CALIF. Location. — Near center of W. -| sec. 9, T. 1 N., R. 11 W., about 2 miles northeast of Sierra Madre, Los Angeles County. Deainage area. — 1.9 square miles (measured on topographic map). Elevation. — About 2,100 feet above sea level. Records available. — April 15, 1916, to September 30, 1918. Gage. — Gurley graph water-stage recorder on left bank about 150 feet below Scherer's cabin. Discharge measurements. — ^Made from wooden bridge near gage or by wading. Channel and control. — Gravel and boulders; permanent. One channel at all stages, straight for 75 feet above control. Right bank is rock cliff; left bank is stone wall 5 feet high which is probably above maximum stage. Control is low concrete dam, with triangular notch at left end, just below gage. Zero flow is at stage, 0.70 foot and top of dam at stage 1.50 feet. (See PI. XIII, C, p. 422.) Extremes op discharge. — 1916-1918: Maximum stage recorded, 2.30 feet at 12.30 a. m. March 10, 1918 (discharge, 58 second-feet); minimum stage recorded, 0.86 foot at 7.30 p. m. September 12, 1918 (discharge, 0.03 second-foot). Diversions. — None above. Regulation. — None. Accuracy. — Stage-discharge relation permanent. Rating curve fairly well defined. Mean daily gage height determined by inspection of recorder graph. Daily discharge ascertained by applying mean daily gage height to rating table. Records good. LOS ANGELES BIVER BASIN. 469 Discharge measurements of Little Santa Anita Creek near Sierra Madre, Calif., for 1916- 1918. Date. Made by- Gage height. Dis- charge. Date. Made by — Gage height. Dis- charge. 1916. Apr. 15 24 May 2 24 Feet. Sec. -ft. 2.0 1.7 1.8 1.2 1.0 ,6 1.0 .5 .4 .5 .4 1.2 1.0 2.5 .7 1917. Feb, 20 21 24 Oct. 24 Dec. 22 1918. Feb. 21 Mar. 11 28 Apr, 22 May 4 16 July 1 Aug, 2 Sept, 23 H. J, Tompkins do J. C, Dort Feet. 1,56 1.77 1.72 1.02 1,05 1.72 1.97 1.58 1.34 1.30 1.30 1.12 1.06 1.02 Secf.^ do do 6.3 6 1 J C Dort H. J, Tompkins E , Tompkins 1 do.... do .15 July 15 Oct. 10 23 C. W, Sopp do H.J.Tompkins do do do J C Dort 1.35 1.25 1.22 1.20 1.20 1.39 1.40 1.60 1.32 5,0 Nov. 12 19 H, J. Tompkins C, W. Sopp 18 2.0 26 Dec 31 H. J. Tompkins '^...do'.'^'^'.'.'..'.'^'^'.'.'.. C W Sopp .86 .58 1917 H. J.Tompkins ["ildo!!!!!"!'---""'.- .65 29 Jan. 6 20 Feb. 10 H, J, Tompkins do .19 .18 Daily discharge, in second-feet, of Little Santa Anita Creek near Sierra Madre, Calif, for 1916-1918. Day. Aug, Sept. Day. Aug. Sept. Day. Aug, Sept. 1 1916, 0,25 .25 .25 .25 .3 .3 .3 .3 .25 .25 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 1916. 0.25 .2 .2 .2 .2 .2 .2 .2 .2 ,2 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 1916, 0.2 2 .25 3 .3 4 .3 5 .3 6 .35 7 .3 8 .25 9 .25 10 -- 0.25 .25 1.0 Note.— No gage-height record Sept. 9-17 and 29-30; discharge estimated. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June, July. Aug. Sept. 0,8 .8 15., 16.. 17.. 18.. 19.. 20.. 21.. 22.. 23.. 24.. 25.. 26.. 27.. 28.. 29.. 30.. 31.. 0.4 .4 .4 0.5 .7 1.8 .7 .4 .4 .4 .4 .4 1.4 4,3 2.5 1,8 1.4 1.5 1.2 1.1 1.1 1.0 1.0 1.0 1.0 1,0 .9 1.1 2.7 2.5 2.3 1.9 1.7 1.6 1.4 1.3 1.2 1.2 1.2 1,1 1.0 .7 ,7 .7 •7 .7 1.2 .9 1.0 1.8 7.5 12 8 5.5 7,5 4.8 4.3 3,4 3.2 3.0 2.7 2.5 2,5 2,5 2.2 2.2 2.2 2.1 1.8 1.7 1.6 1.6 1.5 1.4 1.3 1.3 1.3 1,2 1.2 1.2 1.1 1.1 1.1 1.1 Note.— Water-stage recorder not in operation Oct. 2-9, 17-22, 29;Mar. 29; 29-30 — discharge interpolated. 0.3 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 .2 ,2 ,2 .1 .1 .1 .1 .1 .1 .1 .1 .1 .1 June 17-22; July 15-20; and Sept. 470 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Da/tly discharge, in second-feet, of Little Santa A^iila Cnch near Sierra Madre, Calif, for 1916-1918— Continued . Day. Apr. May. July. Aug. Sept. 1917-18. 1.. 4 5 6 7 8 9 10... 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 0.2 .2 .2 .2 .2 0.1 .1 2.7 1.9 2.0 7 3.5 5.5 4.1 3.7 3.9 3.3 2.9 2.7 2.5 2.3 2.1 2.0 2.0 2.1 2.1 2.0 Note. — No gage-height record Oct. 1-6, 18-20, and Jan. 6-16 — discharge interpolated. Monthly discharge of Litlti'e Sant-a Anitki Creek near Sierra Madre, Calif., for 1916-191S. Discharge in second-feet. Run-off (total in acre- feet). Month. Discharge in second-feet. Eun-off (total Month. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. in acre- feet). 1916. September 1.0 0.2 a 275 16 1917-18. October 0.2 .2 .2 .2 12 23 1.9 .8 .6 .3 .2 .2 0.1 '.% .8 .6 .2 .2 .05 .04 0.123 .153 .194 .165 1.14 4.72 1.15 .723 .430 .210 .126 .099 7.6 November December January 9.1 11.9 10.1 1916-17. October .8 .5 14 2.7 12 4.8 1.2 1.6 .8 .5 .3 .2 .4 .4 .4 .8 .7 1.1 .8 .7 .4 .2 .2 .1 .648 .413 1.28 1.23 2.71 2.03 .950 .871 .577 .300 .203 .110 39.8 24.6 78.7 75.6 151 125 56.5 53.6 34.3 18.4 12.5 6.5 November December February March 63.3 290 April 68.4 February March May 44.5 June 25.6 April July 12.9 May 7.7 June September The year 5.9 August 23 .04 .770 557 September The year 14 .1 .93 676 LOS ANGELES BIVEE BASIN. MISCELLANEOUS MEASXJBEMENTS. 471 Measurements of stream flow in the drainage basin of Los Angeles River at points other than those at which gaging stations have been maintained are recorded in the following table : Miscellaneous measurements in Los Angeles River drainage basin, Calif., for 1897-1917. Dale. Stream. Tributary to- LocaUty. Dis- charge. June 24,1898 Los Angeles River, do Pacific Ocean ....do Creek below Macy Street Zanja No. 7 '"^L Do 5.59 Do. do do do . .do Diversion below Zanja No. 7. New bridge, Weir B .64 Aug. 10,1898 Do do do 1.32 San Fernando road crossing.. North Cahuenga road Old bridge, No. 4 4.84 Do. ....do do 9.74 Do do ....do 14.4 Do. . . ....do do Tujunga Creek junction Bridge No. 2, at Narrows. . . Main supply ditch .87 Aug. 15, 1898 Do do do do do 38.7 16.4 Do Jan 5 3899 do do do do Total river at Crystal Springs The Narrows . 55.1 67 Feb, 14' 1899. .do ....do do 61 Feb 25 1899 do do .do . 67 Mar. 11,1899 .. .do ::do:::::::::::.- do m Mar. 25,1899 do do do . 61 Apr. 29,1899 .do do.... do 52 May 18,1899. do . . do .do. ... 58 June 7,1899 do do do 5G July 18,1899 .do .do . .do 55 Aug. 19,1899 do do do 57 Aug. 25,1899 Sept. 20, 1899 do do do do do do 59 53 Sept. 27,1899 ....do .do ...do 54 Oct. 25,1899. do do. . .do 57 Oct. 31,1899 ...do ....do ....do 58 Nov. 17,1899. . do.. do ....do .do 59 Nov. 28,1899 ...do do 56 Dec. 13,1899 do . do ...do 58 Dec. 26,1899 do do do do . ..do do .. . 58 Sept. 20,1901 Mar. 25,1903 do do .do Bridge No. 2 45.9 Los Feliz Bridge . . 109 Apr. 8,1903 . ..do 37 Apr. 13,1903. . do do.. .. !;;!!do"!!!!!!!!!!!!!!!!!!"! 28 Apr. 17,1903 . ...do ...do 64 Jan. 28,1903 do do do do Aliso street Bridge.. . . 66 Apr. 11,1903 Ninth street Bridge 20 Apr. 18,1903 Apr. 12,1905. do do do do do 106 12.7 Apr. 18,1903 do do . do do Boyle Avenue Do Opposite Bell station Above j unction of Rio Hondo Below junction of Rio Hondo J mile above Compton and Clearwater road. Opposite Clearwater . . 73 Apr. 20.1903 Do.'. do do do do . 25 54 Do do do 82 Do do do 5;? Apr. 21,1903 Do.. do do- do do do 1 mile above Cerritos road. . . ih miles below Cerritos road. Opposite Seabright 39 77 Do do 78 Mar. 13,1905 Apr. 12,1905 do do. do do Fourth Street Bridge Huron Street 4,520 43 Mar. 13,1900 Do Mar. 10,1906 Mar. 17,1906 Do Mar. 5,1907 do do do do do do do do do do do . ...do Seventh Street Bridge, a. m. Seventh Street Bridge, p. m. do Seventh Street Bridge, a. m. Seventh Street Bridge, p. m. .do 850 555 1,200 420 3,200 .6 .32 Jan. 28,1901 Do Aliso Creek do Los Angeles River, do Chatsworth road crossing . . . 2 miles below road crossing. . Oct. 9,1900 Pacoima Creek .do . .do .09 Aug. 21,1899 do 5 Jan. 9,1901 do do do do do do do do do ....do .. .do 50 July 12,1901 do do do do do 6.0 Sept. 20,1901 do b.O Apr. 9,1903 do 47 Apr. 18,1903 do 98 May 5,1903 . ...do do 24 June 5, 1903 do do do do g Sept. 26,1903 Apr. 12,1905 do do 6.§ 30 ^ Approximate. ft Stream dry. 472 SUKFACE WATEE OF PACIFIC SLOPE, SOUTHERN CALIFORITIA. Miscellaneous measurements in Los Angeles River drainage basin, Calif., for 1897-1917- Continued. Tributary to— Locality. Dis- charge. Apr. 9,1903.. Apr. 19,1903.. May 5,1903-. June 6,1903.. Apr. 12,1905.. May 5,1903.. Apr. 18,1903.. Apr. 12,1905.. Feb. 13,1917.. Feb. 16,1917.. Aug. 21,1899.. Oct. 9, 1900. . Sept. 21,1901.. Nov. 21,1900.. Nov. 22,1900.. Apr. 9,1903.. Apr. 17,1903.. May 5,1903.. June 4,1903.. Apr. 12,1905.. Nov. 22,1900.. Pacoima Creek — ....do ....do ....do ....do ....do Los Angeles River, do. do. do, Southern Pacific R. E.. ....do .do.. ..do.. ..do.- ..do.. .do.. ..do.. ....do... Maclay . . Tujunga Creek., ..do.- -do.. ,.do.. ..do.. ..do.. ....do Diverts from Pa- coima Creek, do. IJ miles below Southern Pa- cific R. R. 3 miles below Southern Pa- cific R. R. ...do Intake Los Angeles River. .do., .do., .do., .do.. .do.. ..do.. ..do.. ..do.. ..do.. ,.do.. Head works Monte Vista canal. ...-do ...-do Southern Pacific R . R ....do do. .do., .do., .do.. ..do .do., .do.- .do.. Apr. Apr. 17,1903. 12,1905.. Anr. 10,1903.. Apr. 17,1903.. May 5,1903.. June 4,1903.. Sept. 26,1903.. Apr. 12,1905.. Aug. 2,1917.. Dec. 1,1917.. Aug. 11,1898.. Aug. 21,1899-. July 12,1901.. Apr. 10,1903.. Apr. 17,1903.. May 5,1903-. June 4,1903.. Sept. 26,1903.. Apr. 11,1905.. Mar. 31,1916.. Apr. 6,1916.. Apr. 27,1916.. May 22,1916.. June 23,1910.. Feb. 13,1917.. Mar. 5,1917.. Apr. 11,1917., Apr. 24,1917.. May 3,1917.. Jan. 15, 1901.. -do.. .do.- -do-. .do-, -do.. ..do.. ..do.. ..do.. ..do.. Ditch.. ....do.. do. do. Diverts from Tu- junga Creek. do ^ miles below Southern Pa- cific R. R. 1.^ miles below Southern Pa- "cificR. R. 2 miles below Southern Pa- cific R. R. Mouth of canyon do do do do do Bryants Cold Spring Little Tujunga Creek. ....do do do do do do do do do do do do do ...do , ...do ...do -do.. Tujunga, Wash.. Bryants Cold Spring, 6 feet above sand box. ....do -do.. .do., -do-. Apr. 24, 1901.. Jime 4, 1901 . . . Mar. 1,1917... Jan. 10, 1899.. Jan. 11, 1899.. Jan. 12, 1899.. Do Feb. 1,1899.. Mar. 17, 1899- . Mar. 18,1899.. Mar. 19, 1899- . Mar. 20, 1899.. Mar, 21, 1899., Main Supply ditch plus Crystal Springs. ....do do Cook Creek Arroyo Seco.. ..do.. ..do., -do-- ..do.. ..do.. ..do.. ..do-. ..do-. ..do.. ..do.. ..do.. ..do.. ..do.. ..do.. ..do.. ..do ..do ..do -do., -do., .do.. do. ...do Mouth of canyon do !!;]do!"'!!"!!!!"!!""!!! Mouth of canyon (estimated) Mouth of canyon do. do. ..do.. ..do.. Above Bellevue reservoir diversion. Los Angeles River, ..do. ..do. ,.do.. ..do., ..do., ..do.. ..do.. ..do.. ..do.. ..do.. ..do.. ..do. ..do. ..do. ..do. ..do. ..do- ..do. .-do. ..do. Just below junction of main forks near La Crescenta. Cable station, Terminal quarries. do do do do do do do do do Sec. ft. 32 57 16 6.0 17.6 &.0 6.0 3.5 2.4 .44 .19 .22 1,060 19.2 2 124 29 .05 6.0 6.0 59 157 37 • 12 .1 61 1.1 2.0 .05 6.0 6.0 .0 3.3 3.7 4.4 2 1.2 .2 2 8.1 L6 1.8 L4 53.9 3.02 1.9 2.0 2.06 .24 3.24 1.77 .93 2.52 1.9 3 Computed from flood marks. 6 Stream dry. LOS ANGELES BIVEE BASIN. 473 Miscellaneous measurements in Los Angeles River drainage basin, Calif., for 1897-1917-— Continued. Date. Stream. Tributary to— Losality. Dis- charge. Mar. 22, 1899 Arroyo Seco do . - Los Angeles River. do Cable station, Terminal quarries. do Sec.-ft. 1.64 Mar. 23, 1899 1 56 Mar 26 1899 do ..do .. do 2 2 Mar. 28^ 1899 do do do 1.22 Apr. 2, 1899 ... do ... do do .28 Apr 12 1899 do do . ... do 08 Jan. 3, 1900 .. do do do 20 3 Jan. 4, 1900 do do ... do . 4 3 Mar. 5, 1900 do do do 7.2 Mar. 6, 1900 do do do 1 2 Mays, 1900 do do do 42 4 May 6, 1900 do do do 10 5 May 7 1900 do do do 5 4 May 14, 1900 .. do do do 2 2 Nov. 20, 1900 do ... do . do 23 Nov. 21, 1900, 11 a. m . do do do 32 Nov. 21, 1900, 12 m do do . do ... do . 35 Nov. 21, 1900, 1p.m... Nov.21, 1900, 1.30 p.m. Nov. 21, 1900,2p.m... Nov. 21,1900,3 p.m... Nov, 22, 1900, 11 a. m do do 75 do do do do .....do do 81 100 do do do 144 do . do . do 85 Nov. 22, 1900, 2p.m... Nov. 23, 1900 . . do do do .. do do . . do.. 99 31 Nov. 24, 1900 do do do 11 5 Nov. 26, 1900 do . . .- do do 8 7 Dec. 1, 1900 . do do . do 4 3 Dee. 6, 1900 .. do do do 1 4 Jan. 6, 1901 do . do . do 7 Jan. 7, 1901,9.30a. m... do do .... do do do... 172 Jan. 7, 1901, 3.45 p. ra.. Jan. 8, 1901 do do .....do do 103 28 Jan. 11, 1901 .. do. . do .do... 14 Jan. 14, 1901 do do do 7 Jan. 20, 1901 .. do . do do 5 Jan. 21, 1901 do do do 11 Jan. 23, 1901 do do do do 7 Jan. 28, 1901. . . . do . . ..do 39 Jan. 29, 1901 Feb. 4, 1901 ... do . do do ... do do do 11 29 Feb. 5, 1901, 11 a. m do do do 809 Feb. 5, 1901, 3 p. m Feb. 6, 1901 . . do do do.. 410 do do do 200 Feb. 9, 1901 do do .... do 102 Feb. 11, 1901 do do .. do 102 Mar. 16,1901 do do do 17 Apr. 29, 1901 do do do . 1 6 May 10, 1901 do do do 5 3 July 12, 1897 do .... do Near De^^ls (lateo 5 12 Aug. 9, 1897 .. do . . do do 4.63 4.13 4.16 3 6 Oct. 11, 1897 do do ..do do Nov. 8, 1897 do do Sept. 16, 1898 do do do Oct. 12, 1898 do do do 3 44 June 14, 1899 do do do 5 17 May 31, 1899 do do do.. 3 17 July 10, 1899 do - do do 2.87 3.55 17 Sept. 17, 1899 do do .. . do... Apr. 13, 1903 do do Devils Gate May 21, 1903 do do do 2 Do do do 1 mile below Devils Gate Devils Gate .0 12 5 Apr. 11, 1905 do do Apr. 18, 1906 do do do 9.2 1.69 1.48 1.43 1.36 1 62 Sept. 16, 1898 do ... do Sheep corral total Oct. 24, 1898 do do May 29, 1899 ... do do June 3, 1899 do do do ... Jione 21, 1899 do do do July 1,1899 do do ... do 1 33 July 13, 1899 do do do 1 3 Sept. 19, 1899 do do do 1 94 Sept, 21, 1899 do do do 1 37 Apr. 13, 1903 do . . do do 4 Apr. 17, 1903 do do do 80 Feb. 6, 1901 do ... do . 270 Jan. 28, 1903 do do ... do . 274 Mar. 25, 1903 do do do 128 Apr. 17, 1903 do do ....do 77 a Devils Gate developments include Richardson and Wilson tunnels. 474 SUEEACE WATEE OF PACIFIC SLOPE; SOUTHEEN CALIFOENIA. Miscellaneous measurements in Los Angeles River drainage basing Calif ., for 1S97-1917 — ■ Continued. Tributary to— Locality. Apr. 13, 1903- . Apr. 17, 1903.. May 21, 1903... Apr. 11, 1905.. Apr. 18, 1906.. Apr. 17, 1907.. May 14, 1907... Apr. 17,1908.. Sept. 16, 1898.. Do Jan. 11, 1899.. Apr. 13, 1903. Oct. 27, 1905.. Apr. 11, 1905. Apr. 18, 1906. July I'l, 1908.. Apr, 7, 1910. JuneO, 1910. June 28, 1910.. Feb. 26, 1914 . . Mar. 12, 1914 . . May 4, 1914... Apr. 20, 1916.. May 4, 1916... May 29, 1916.. Mar. 15, 1917 . . Apr. 25, 1917 . . May 29, 1917.. Aug. 27, 1917 . . Oct. 16, 1917 . . Nov. 3,1917... July 3, 1898... Aug. 8,1900... July 15, 1902 . . Aug. 18,1902.. Sept. 8,1902.. Sept. 27,1902., Oct. 11,1902.. Apr. 27,1903.. Oct. 2, 1903... June 15, 1904.. July 8, 1904 . . . Aug. 31, 1904 . . Sept. 24, 1904.. Oct. 5, 1904 . . . Oct. 15, 1904.. Oct. 6,1905-... Apr. 20, 1903 . . Apr. 27, 1903.. Do Do Nov. 14, 1898. Jan. 11, 1899.. Apr. 18, 1903.. May 21, 1903.. Do Sept. 9, 1903.. Apr. 18, 1903.. May 21, 1903.. May 20, 1916.. June 9, 1916... JuIvlO, lOlii.. Aug. 22, 1916.. Nov. 23, 1916.. Arroyo Seco - do do do do do do do do .do. .do. ..do., .do. .do. .do. .do. .do. do Millard Canyon Creek. do do do do do do do do do do do Kio Hondo no . . do do do do do do do , do do do , do do do do do ..do. ..do. ..do.. Eaton Canyon Creek. ..do ..do ..do lios Angeles River. do do do ....do ....do ....do do ....do ..do. ..do. ..do. ..do. ..do.. ..do. .do. .-do. Eaton Canyon Creek. ....do ....do ....do. --.-do. ....do. ....do. do .\rroyo Seco do do do do do do do do do do do Los Angeles River do ....do do do do do do do -..-do do do ....do do do do do ..do. .do. ..do. Mouth of canyon do do do do do do do Total flow into Osage Grove Avenue reservoir. Marengo Improvement Co. reservoir. Loughery dam site Garvanza wagon bridge Sycamore grove, near Mor- gan's south line. ^ 1.000 feet above submerged dam of Pasadena Land & Water Co. Submerged dam 1 mile above junction with Millard Canyon. Mouth of Millard Canyon, 4 miles north of Pasadena. Li flume at intake of North Pasadena Land & Water Co. Total flow of stream. do Mouth do do , Above diversion near mouth. do do Mouth do do do ....do ....do Old Mission Bridge do .--.do -..-do ....do ....do ....do ....do ....do ....do ....do ....do ....do ....do ....do do Los Angeles & Salt Lake Ry. above Workman. Wliittier road crossing Road crossing west of Rivera Southern Pacific R. R. west of DoAvney. .do. .do. .do. Near falls Mouth of canyon do Water Co.'s diversion. Mouth of canyon .do. .do. .do. .do. .do. .do. .do. Southern California Ry 1 mile above Southern Cal- ifornia Ry. Above upper dam do ....do do ....do =f Stream dry. LOS AKGELES EIVEE BASIN. 475 Miscellaneous measurements in Los Angeles River drmnage basin, Calif ., for 1897-1917-— Continued. Date. Stream. Tributary to— Locality. Dis- charge. Tan 8 1917 Eaton C a n V n Creek, do Rio Hondo do Above upper dam Sec. -ft. 4 6 Jiuie 6 1917 do 1.4 A.ug. 27, 1917 - . ...do do do .9ft June 6 1917 do . .do ... Above intake of Precipice Water Co. Above lower dam, about one-fourth mile above mouth of canyon. . ..do 1.5 Apr 15, 1916 . .. . do do 7.2 Apr 21, 1910 do do 4.$ May 3, 1910 . ..do do do 3.4 1.5 .4 .9 3.T «.o 2.S Tnnp. 9, 1910 do .do . . . ..do Jvily 10, 1910 ....do do do Nov, 23, 1916. do .... . ..do .... do Jan. 8, 1917 do do do Oct. 24, 1917 .do do .. ..do June 6, 1917 do do 500 feet below upper timnel . . iVug. 27, 1917 .do .. ..do Mount Wilson toll bridge «- Oct 24 1917 do do ..do. .OS 35 1.5 Do ..do do Air to air timnel Mouth of canyon . . . Apr 18, 1903 Santa Anita Creek. .do .. . Oct. 23, 1905 do do do Apr.18,1903: May, 23, 1903... do .do . . do .do Southern Pacific Co.'s Mon- rovia branch. White Oak Avenue Near mouth Apr 18, 1903 Little Santa Anita Creek. Santa Anita Creek. WATER ABSORBED IN SAND AND GRAVEL. During the winter of 1902-3 the precipitation in southern Cahforiiia was greater than at any time during the preceding 10 years. This condition led to heavy irrigation during the spring of 1903, many irrigators taking advantage of it to thoroughly saturate the soil at a time when water was plenty and cheap, thereby saving much expense and contention which always accompanies a later irrigation when water is scarce and expensive and the demand is greater than the supply. Immediately after the rain of April 16, 1903, a series of measure- ments w^ere made by W. B. Clapp under the direction of the United States Geological Survey to determine the quantity of water being absorbed in the sand and gravel washes of the lai^ger tributary streams, of the three principal river basins of southern California — Santa Ana, San Gabriel, and Los Angeles rivers. Measurements were taken at the mouths of the canyons where the streams leave the mountains, at all canal diversions, and at such intervals along the streams as time and the available force detailed for this work would allow, the location of the point where the stream entirely disappears or lef_t.^ the valley being noted. These measurements show the quantity of water taken up in the sand and gravel wash of this stream on the days given, and the following tables give this quantity in second-feet and acre-feet for a period of 24 hours. 476 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Water discharged from tributary streams and sinhing in the Los Angeles Biver basin above Burbanh, Calif. Jor 1903. Second-feet. Acre-feet. stream. Diver- sion. Waste. Total. Diver- sion. Waste. Total. Apr. IS. 157 27 98 157 27 98 311 54 194 311 ' Little Tujunga 64 Pacoima 194 282 282 559 559 May 5. Tujunga 37 4 24 37 4 24 73 8 48 Little Tujunga Pacoima 65 65 129 June 4. Tujunga ... . . 3 9.3 .7 5 12.3 .7 8 6 6" 18 1.4 10 24 Little Tujunga 1.4 3 16 6 15 21 12 29.4 41.4 MALIBU CREEK BASIN. GENERAL FEATURES. Malibu Creek rises in the Santa Monica Mountains and enters the Pacific Ocean about 15 miles above the town of Santa Monica. This stream is formed by Triunfo and Las Virgenes creeks, which drain the northern portion of the Santa Monica Range and the lower foothill country to the north. The rocks throughout this basin are shale,' sandstone, and conglomerate covered with good soil. A sparse | growth of timber is formed at the higher elevations but the greater part of the area supports a growth of brush and grass that is used; extensively for pasturage. Small areas of cultivated land are devoted to raising grain. A reservoir has been constructed on the upper reaches of Triunfo Creek and the waters are used for irrigation within the basin during the summer. When filled this reservoir covers an area of about 300 acres. The mean precipitation in this basin amounts to about 25 inches annually and falls wholly in the form of rain. GAGING- STATION RECORDS. MALIBU CREEK NEAR CALABASAS, CALIF. Location. — Near center of sec. 12, T. 1 S., R. 18 W. (unsurveyed), at Chapman ranch, ' one-foiirth mile below mouth of Las Virgenes Creek, and about 6^ miles south- west of Calabasas, Los Angeles County. Drainage area. — 97 square miles. Elevation. — ^About 550 feet above sea level. Records available. — ^January 1, 1903, to December 31, 1906. Gage. — Vertical staff fastened to an alder tree on right bank, one-fourth mile below mouth of Las Virgenes Creek. MALIBU CKEBK BASIN. 477 Discharge measurements. — Made by floats or by wading. Channel and control. Rock and gravel; not permanent. Both banks are high; channel straight for 600 feet above and curved for 300 feet below gage. Diversions. — No information. Kegulation. — No information. Accuracy. — Stage-discharge relation not permanent. High-water measurements were made by floats. Rating curves were not well defined. Daily discharge ascer- tained by applying mean daily gage height to rating table, except for 1905-1906, for which it was determined by shifting-control method. Conditions unfavorable for accurate determinations. Records fair. Discharge measurements of Malihu Creeh near Calabasas, Calif., for 1903-1906. Date. Made by- Gage height. Dis- charge. Date. Made by— Gage height. Dis- charge. 1903. Feet. Sec-feet. 1905. Feet. Sec.-feef. Mar. 6 W. B.Clapp L30 23 May 12 R. S. Havdey 0.82 8.5 25 J. G. Cliapman 2.45 a292 26 do 2.00 alOO 1906. 27 do L90 o72 Mar. 11 C.H.Lee .85 1.0 31 do 3.40 a956 12 do 2.30 122 Apr. 1 do 3.25 o826 25 do 2.80 O406 July 26 W.B.Clapp 1.12 2.1 Apr. 18 do 1.30 19 May 24 do 1.00 7.1 1905. Apr. 20 R. S. Hawley .9 9.3 Daily a Float measurement. discharge, in &econd-feet, oj Malihu Creeh near Calabasas, Calif, for 1903-1905. Day. 1903, 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18. 19 20 21 22 23..... 24 25 26 27 28 29 30 31 Jan. Feb. Mar. Apr. May. Jmie. 2.5 18 10 817 10 8 2.5 18 10 362 10 8 2.5 16 10 179 10 8 2.5 16 28 128 10 8 2.5 16 30 72 10 8 2.5 16 28 72 10 8 2.5 16 20 72 10 5 2.5 16 18 33 10 2.5 16 16 33 10 5 2.5 16 16 24 10 5 2.5 16 16 24 10 5 3.5 16 14 24 10 5 3.5 16 14 24 10 5 3.5 16 14 20 10 5 3.5 16 14 16 10 5 3.5 16 14 785 10 5 4.5 16 14 415 10 5 4.5 16 14 146 10 5 4.5 16 12 95 10 4.5 16 12 57 10 5 3.5 16 10 50 10 5 3.5 16 10 44 10 5 3.5 16 10 33 8 5 3.5 16 17 24 8 5 4.5 16 265 16 8 5 4.5 16 86 16 8 5 7 10 75 13 8 4 113 10 34 10 8 4 27 34 10 8 4 18 34 10 8 4 12 525 8 July. Note. — Record stopped for the summer July 31. 478 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Malihu Creeh near Calabasas, Calif., fm- 190S-190S — ■ Continued. Day. Nov. Dec. Jan. Feb. Mar. Apr. May. June. Julj. 1903-4. 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 I 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 10 8 8 5 5 5 5 5 5 5 5 8 5 5 5 5 5 5 5 6 5 5 5 33 20 8 4 4 4 4 4 4 4 4 4 4 24 8 5 5 5 5 5 5 5 5 5 2 2 2 1.5 1 1 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 4 4 4 4 4 4 ' 4 4 4 4 4 4 2 2 2 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1 1 1 1 1 1 1 L5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 2 1.5 3. 4 5.. . 6 7.. 8 9.. .. 10 11 12.. 13 14.. 15 16 17 18 19. . 20. 21 22 23 24 25 26 27 28 29 30 31 . Note.— Record stopped for the summer July 2. Day. Oct. Nov. Dec. Day. Oct. Nov. Dee. Day. Oct. Nov. Dec. 1904-5. 1 4 4 5 5 5 5 5 5 5 1904-5. 11 5 5 5 5 5 5 5 5 5 5 1904-5. 21 1 2 2 2 4 5 2 12 22 5 3 13 23 5 4 14 24 5 5 ., 15 1 25 5 6 16 26 5 7 17 27 5 8 18 28 5 9 19 29 5 10 20 30 5 31 5 MALIBU CEEEK BASIN. Monthly discharge oj Malibu Creek near Calabas&.s, Calif., for 1903-1906. [Drainage area, 97 square miles.J 479 Discharge in second-feet. Rim-off. Month. Maximum. Minimiun. Mean. Per square mile. Depth in inches on drainage area. Total in acre-feet. 1903. January 113 18 525 817 10 8 4 2.5 10 10 10 8 4 2 8.5 15.7 46.0 120.8 9.4 5.5 2.6 0.09 .16 .47 1.25 .10 .06 .03 0.10 .17 .54 1.39 .12 .07 .03 523 872 March 2,828 7,188 May. . 578 Jime 32"/ July . 160 The neriod 12,500 1903-4. November . . . 2 5 5 10 33 5 4 1.5 2 2 5 5 4 1 1 1.5 2.0 4.1 5.0 5.5 6.9 3.0 2.2 1.5 .02 .94 .05 .06 .07 .03 .02 .02 .02 .05 .06 .06 .08 .03 .02 .02 119 252 January 307 February 316 March , 424 April 179 May . . 135 June.. 89 The period 1,820 1904-5. October 15-31 1 4 5 10 560 6,800 41 24 4 3 3 3 1 4 5 2 1 8 4 3 3 3 1 a 1.0 1.2 4.9 5.4 36.1 484 14.4 7.3 3.8 3 3 2.1 .01 .01 .05 .056 .372 4.99 .148 .075 .039 .931 .031 .022 .01 .01 .06 .06 .39 5.75 .16 .09 .04 .04 .04 .02 61 November 71 Deeember 301 J anuary 332 February 2,005 March . 29,760 April. ... 8.57 May 449 June 226 July . . 184 August September . 184 125 The period 34,600 1905-6. October, . 2 4 4 3 12 2,600 62 15 7 7 4.4 4.4 1 2 3 .8 .8 .9 9 7 7 4 4.4 2 1.1 3.6 3.7 1.3 1.8 223 22.1 9.1 7.1 4.8 4.4 3.6 .011 .037 .038 .013 .019 2.30 .228 .094 .073 .049 .045 .037 .01 .04 .04 .01 .02 2.65 .25 .11 .08 .06 .05 .04 68 214 December 228 January 80 February 100 March 13,700 April 1 320 May ^560 June . 422 July 2<>5 August . 271 September 214 The vear . ... 2,600 .8 23.0 .247 3.36 17,500 1906. October 4.4 4.4 275 4.4 4.4 2 4.4 4.4 19.8 .045 .045 .204 .05 .05 .24 271 November 262 December 1,220 a Taken as mean for month. Note.— During 1905-6 discharge was determined by the indirect method for shifting control channels. Records are only approximate. 480 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN" CALIFORNIA. TItlTJNFO CREEK NEAR CALABASAS, CALIF. Location. — In NW. | sec. 12, T. 1 S., R. 18 W. (unsurveyed), half a mile above junction with Las Virgenes Creek and 6^ miles southwest of Calabasas, Loa Angeles County. Drainage area. — 72 square miles. Elevation. — About 550 feet above sea level. Records available. — January 1, 1903, to December 31, 1906. Gage. — Vertical staff bolted to rock cliff on right bank half a mile above junction with Las Virgenes Creek to form Maiibu Creek. Discharge measurements. — Made by floats or by wading. Channel and control. — Gravel and sand; shifting. Both banks are high and rocky; channel straight for 400 feet above and 800 feet below gage. Diversion.— No information. Regulation. — No information. Accuracy — Stage-discharge relation not permanent. High- water measurements were made by floats. Rating curves were not well defined. Daily discharge ascertained by applying mean daily gage height to rating table, except for 1905-1906, for which it was determined by shifting-control method. Condi- tions unfavorable for accurate determinations. Records fair. Discharge measurements of Triunfo Creeh near Calabasas Cab'/., jor 1903-1906. Date. Made by— heignt. Dis- charge. Date, Made by- height. Dis- i charge. 1903. Mar. 6 W.B. Clapp J. G. Chapman do do do do do W.B. Clapp R. S. Hawley.. . Feet. 1.15 1.75 1.15 1.05 2.75 2.35 2.30 .40 1.60 1.44 Sec.-ft. 23 155 a 40 a 13 ol,075 o625 a 551 1.0 8.0 7.1 1906. Mar. 11 11 12 25 25 25 26 Apr. 18 May 24 C. H. Leo.. Feet. 1.25 1.38 2.25 2.95 2.79 3.00 4.50 2.00 2.05 Secf.^ 25 26 27 31 Apr. 1 16 July 26 1905. Apr. 20 May 12 do do do do do do do do 1.8 98 459 313 399 o2,320 19 6.1 do a Measured by floats. MALIBU CREEK BASIN. 481 Daily discharge, in second-feet, of Triunfo Creek near Calabasas, Calif, for 1903~4- Day. Jan. Feb. Mar. Apr. May Jime July 1903. 1 1.5 1.5 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 1.5 1,5 1.5 1.5 1.5 2.0 2.0 2.0 2.0 1.5 1.5 1.5 2.0 2.0 2.0 3.0 23 12 8 8 8 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 8 8 8 8 8 28 22 16 - 16 16 16 12 12 12 12 12 12 12 12 12 12 12 8 8 8 16 102 19 12 12 12 12 373 504 90 35 26 19 16 14 12 12 8 8 8 8 8 411 250 74 60 46 35 30 26 19 14 14 12 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 8 8 8 8 8 8 8 6 6 6 6 6 6 6 6 6 6 4 4 3 3 3 3 3 3 3 2 2 2 2 2 2 2 3 2 4 2 5 2 6 2 7 . 2 8-. 2 9 2 10... 2 11 2 12 2 13... 2 14 2 15 2 16 2 17 2 18 2 19 .;.. 2 20.. 2 21 ... . .... 2 22 2 23 2 24... 2 25 2 26.. 2 27 2 28 2 29 2 30 2 31... 2 Note, — Record stopped for the summer July 31. Day. Nov. Dec. Jan. Feb. Mar. Apr. May. 1903-4. 1 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 5 4 4 3 3 3 3 3 3 3 5 8 6 6 4 4 4 4 4 4 4 6 4 4 3 3 3 3 3 3 3 2 2 26 14 4 3 3 3 3 3 3 3 3 3 3 19 6 5 4 4 4 3 3 3 3 2 2 2 2 2 2 1 .5 .5 .5 .5 .5 1 2 2 3 . 3 4 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 2 4 2 5... 2 6 2 7 . 2 8 2 9... 1 10 1 11... .5 12 13.... 14... 15 16 17 . . 18... 19 20 21 22 23... 24 25 26 27 28 .. 29 30 31 Note,— Stream dry May 12 to Sept, 30. 142131°— 21^WSP 447- 31 482 SUKEACE WATER OF PACIFIC SLOPE, SOUTHERIT CALIFORNIA. Monthly discharge of Triunfo Creeh riear Calabasas, Calif., for 1903-1906. [Drainage area,, 72 square miles,] Discharge in second-feet. Maximum. ! Minimtxm, Per square mile. Run-off. Depth in inches on January... February . March April May June ...... July., 23 12 373 510 3.3 11.6 27. .5 60.0 7.-5 3.6 2.0 .10 .05 .03 0.06 .17 .45 .93 The perici November . December. . January — February . . March April my 2.0 3 The period . January — February . . March April May June July August September . 410 5,000 40 6 2 1 .0 26.2 353. Q 11.2 1.0 1.3 .97 .0 .0 October November . December. . January — February . . March April May June July August September . 0.7 10 2,000 55 12 .0 .0 .0 .2 1.1 155 19.3 6.9 6.0 3.6 1.7 The year . October NoA-ember . December. . 4 100 1.5 10.8 .01 .03 .04 .08 .07 .02 .01 . .02 .01 .0 .364 4.90 .156 .014 .018 .013 .0 .0 .0 .38 5.65 .17 .02 .02 .02 .0 .0 .0 .0 .0 .0028 .015 2.15 .083 .060 .024 .00 .0 .003 .02 2.48 .30 .11 .09 .06 .0 .021 .150 .0 .02 .17 Note.— Discharge for 1905-6 detei'mined by the indirect method for shifting control. SANTA CLARA RIVER BASIN. GENERAL FEATURES. Santa Clara River rises in Soledad Canyon, in the northwest end of the Sierra Madre, in Los Angeles County, Calif., and flows westward through what are known locally as the Piru, Sespe, and Santa Clara valleys. The stream is augmented by live tributaries, which enter it from the north — the San Francisquito, the Castac, the Piru, the SANTA CLARA EIVER BASIN. 483 Sespe, and the Ojai. The river passes through Ventura County and empties into the Pacific Ocean about 3 miles south of Ventura. For the lower 40 miles of its course the channel of Santa Clara River is broad and sandy. A. remarkable feature is the small run-off from this large drainage basin. The flood stages of the stream occur almost wholly in the winter, and at most points on the drainage line the channel is dry during the summer. The valley through which the river flows is of a high order agri- culturally, and its products include all the citrus fruits common to California. GAGING- STATION RECORDS. SANTA CLARA RIVER AT FIIXMORE, CALIF. Location. — In NW. ^ sec. 31, T. 4 N., R. 19 W., at highway bridge 1^ miles above mouth of Sespe Creek and half a mile southwest of Fillmore, Ventura County. Drainage area. — Not measured. Elevation. — About 400 feet above sea level. Records available. — August 31, 1911, to September 30, 1912. Gage. — Vertical staff fastened to piling neai' right end of bridge. Discharge measurements. — Made from bridge at gage or l)y wading. Channel and control. — Shifting sand. Diversions. — Water is diverted for irrigation from main river and tiibutaiies above the station. Regulation. — No information. Accuracy. — Stage-discharge relation not permanent. Rating curves only fairly well defined. Daily discharge ascertained by applying mean daily gage heights to rating tables covering short periods or by shifting-control method. Records fair. Discharge measurements of Santa Clara River at Fillmore, Calif ., for 1911-12. Date. Made by — Gage height. Dis- charge. Date. Made by- Gage height. Dis- charge. 1911. Oct. 25 F. C. Ebert Feet. 2.40 2.40 2.23 2.22 2.14 2.07 Sec.-ft. 23 23 27 26 20 14 1912. Mar. 16 25 Apr. 25 May 13 June 26 Aug. 7 19 Sept. 6 F. C. Ebert Feet. 2.57 2.81 3.32 3.24 2.96 2.70 2.30 2.50 Sec.'ft. 91 25 Lasley Lee . . do.. do do do do... do do 64 1912. Jaji. 8 F. C. Ebert 40 34 18 26 Feb. 4 29 do do do 16 6.5 14 Note. — All measurements made by wading. Daily discharge, in second-feet, of Santa Clara River at Fillmore, Oalif.,for 1911-12. Day. Aug. Sept. Day. Aug. Sept. Day. Aug. Sept. 1.. 1911. - 36 36 41 43 36 36 36 39 34 39 11.. 12.. 13.. 14.. 15.. 16.. 1911. 39 39 39 39 39 41 36 36 41 45 21.. 22.. 23.. 24.. 25 1911. 41 2.. 36 3 ^3 4 43 5 43 6 26.. 27.. 28.. 29.. 30.. 31.. 43 17 43 8 18 43 9 19 . . 43 10 20 43 36 484 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Santa Clara River at Fillmore, Calif., for 1911-12 — Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1911-12. 1 43 45 45 45 39 39 45 45 45 51 47 41 41 61 41 41 41 49 49 43 43 43 49 24 24 25 25 25 25 25 25 26 26 26 26 26 26 27 27 27 27 27 27 28 28 28 28 28 28 29 29 29 29 29 29 30 30 30 30 30 30 31 31 31 31 31 31 31 31 31 ^.^ 25 25 25 25 25 25 25 25 25 25 26 26 26 26 26 26 26 26 26 26 26 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 29 25 25 25 25 25 25 29 29 29 29 21 21 25 25 25 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 25 25 25 86 112 182 70 131 245 148 50 132 52 95 93 93 109 103 85 80 75 78 72 68 63 33 32 30 53 22 50 55 53 51 42 147 143 138 135 68 66 64 62 38 36 33 52 50 48 78 95 92 80 31 31 31 31 31 31 31 34 34 31 34 34 34 34 42 46 46 46 38 34 34 34 34 34 34 34 28 28 38 38 38 38 38 38 38 38 38 38 42 42 42 38 38 38 38 42 42 42 42 38 38 38 42 42 42 38 38 38 42 42 42 42 38 38 18 18 18 18 13 20 20 21 21 21 21 21 21 22 22 22 22 22 22 23 23 24 24 24 24 25 25 25 25 25 25 26 24 24 24 24 24 25 25 25 25 17 16 15 14 14 3 12 11 10 9.7 8.9 8.1 7.3 6.5 6.5 12 12 12 12 12 12 14 14 14 14 2 14 3 14 4 14 6 14 6 14 7 15 8 17 9 18 10 18 11 19 12 20 13 20 14 21 15 22 16 23 17 23 18 24 19 25 20 25 21 25 22 25 23 27 24 27 25 29 26 30 27 31 28 21 29 ........ 32 30 32 31 Note. — Daily discharge determined from fairly well defined rating curves and by the indirect method for shifting-control channels. Interpolated between measurements Aug. 8-20, 1912. Monthly discharge of Santa Clara River at Fillmore, Calif , for 1911-12. Discharge in second-feet. Run-oft' (total in acre- feet). Month. Discharge in second-feet. Run-oflf (total in acre- feet). Month. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mni- mum. Mean. 1911. September October 45 51 30 31 29 29 245 34 24 26 25 25 21 22 39.7 39.3 28.0 27.3 28.2 22.2 81.2 2,360 2,420 1,670 1,680 1,730 1,280 4,990 1912— contd. April ... 147 46 42 26 25 32 31 28 13 20 6.5 14 62.6 36.6 36.2 23.0 13.9 22.1 3,720 May 2,250 2,150 1,410 November June December .... July August 855 1912. September The year 1,320 February March 245 6.5 35.1 25,500 PIRIT CREEK NEAR PIRTI, CALIF. Location. — In southern part of Temescal grant, below suspension footbridge in Santa Barbara National Forest, 1\ miles below Holser Canyon, 2 miles above junction with Santa Clara River, and If miles northeast of Piru, Ventura County. Drainage area. — 432 square miles (measured on topographic maps). Elevation. — ^About 700 feet above sea level. Records available. — October 28, 1911, to September 5, 1913. (Discharge measure- ments only, October 28, 1911, to February 29, 1912.) Gage. — Vertical staff in two ser^tions fastened to Cottonwood tree on right bank, about 300 feet below bridgjs. SANTA CLARA RIVER BA^m, 485 Discharge measurements. — Made from railroad bridge 1 mile below gage or by wading. Channel and control. — Gravel and sand; shifting. Diversions. — ^Water is diverted above the station through a 4-inch pipe for municipal supply at Piru. Regulation. — No information. Accuracy. — Stage-discharge relation not permanent. Rating curves only fairly well defined. Daily discharge ascertained by applying mean daily gage height to rating tables covering short periods or by shifting-control method. Records fair. Discharge measurements of Piru Creek near Piru, Calif., for 1911-1913. [MadebyF.C. Ebert.] Date. Gage height. Dis- charge. Date. Gage height. Dis- charge. Date. Gage height. Dis- charge. 1911. Feet. '-4'- 1912. Feet. Scc.-ft. 1913. Feet. Sec.-ft. Oct. 28 2.57 Aug. 19 2.88 9.3 Mar. 6 3.90 271 Sept. 6 2.88 7.5 9 4.00 281 1912. Oct. 11 2.88 9.7 31 3.55 140 Jan. 8 2.93 31 Nov. 7 2.93 15 Apr. 2 3.66 158 25 2.92 30 Dec. 4 2.74 16 28 3.76 55 Feb. 4 2.89 25 30 3.22 51 29 2.95 27 1913. May 21 2.82 24 Mar. 16 3.60 160 Jan. 6 2.71 11 23 2.80 25 25 3.36 111 8 2.72 13 June 5 3.03 48 May 12 3.49 80 29 4.23 28 24 2.62 17 16 3.30 64 31 4.22 25 26 2.63 20 June 26 2.90 18 Feb. 12 3.98 55 Aug. 13 2.40 6.6 Aug. 7 2.85 7.6 27 4.05 483 17 2.43 7.4 Note.— 1911-12: All made by wading. Daily discharge, ip, second-feet, of Piru Creeh near Piru, Calif., for 1912-13 Mar. Apr. May. June. July. Aug. Sept, 1912. 1 2 3 4 5 6 7 8 9 10 11„ 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 37 37 37 137 137 310 170 123 130 162 198 153 145 137 137 137 145 145 153 153 145 145 130 122 122 114 122 122 122 114 114 114 114 114 122 130 137 216 132 U5 115 100 100 100 100 100 100 100 85 72 78 78 78 78 78 72 72 60 124 124 115 108 10 9 9 9 7.6 7.8 8.0 8.1 8.2 8.3 8.7 8.9 9.0 8.9 8.8 8.7 8.3 8.2 8.1 Note.— Daily discharge determined from fairly well defined rating curves applicable as follows: Feb. 1 to Mar. 6; Mar . 7 to Apr. 10; and Apr. 11 to June 25. Shifting-control method from June 26 to Sept. 30. 486 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORlSriA. Ddily discharge, in second-feet, of Piru Creek near Piru, Calif., for 1912-18 — Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1912-13. 1 11 15 15 30 15 15 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 15 15 15 15 15 15 15 15 15 15 15 16 15 15 25 25 25 25 25 25 25 25 25 25 25 25 25 25 20 20 20 20 20 20 20 20 16 16 16 16 16 16 16 16 16 16 16 16 16 16 18 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 13 13 13 11 11 11 13 13 16 16 16 16' 16 16 250 220 250 215 190 155 125 no 85 60 50 42 35 32 28 28 25 30 30 35 40 45 85 260 200 255 225 165 55 55 45 45 40 35 35 30 25 25 20 50 1,250 1,100 ■650 483 450 420 390 360 330 800 271 270 280 281 274 268 262 256 250 244 238 232 228 220 214 208 202 196 190 184 178 172 166 160 154 148 157 157 154 150 146 142 138 134 130 126 122 118 114 110 106 102 98 94 90 86 82 78 74 70 66 62 58 55 53 51 48 44 43 41 40 38 37 34 34 33 31 29 29 28 28 26 • 26 26 25 25 24 24 25 25 23 22 22 21 20 20 20 20 27 29 60 67 91 148 51 37 33 29 29 26 22 22 22 22 19 16 16 16 16 16 16 16 16 22 29 22 19 9 7 7 165 130 104 82 59 37 2 28 3 19 4 13 5 7 6 7 8 9 10 11 . , 12 13 14 15 16 17 18 19... 20 21 22 23 24... . 25 26,. 27 28 29 30... 31.. Note.— Daily discharge Oct. 1, 1912, to June 4, 1913, determined by interpolation between discharge measurements and study of observer's weather notes and by shifting-control method; accuracy only approximate. Discharge June 5 to Sept. 30, 1913, determined from a rating cuv^e v/ell defined below 100 second-feet. Monthly discharge of Piru Creeh near Piru, Calif., for 1912-lS. [Drainage area, 432 square miles.] Discharge in second-feet. Rur -off. Month. Maximum. Minimum. Mean. Per square mile. Depth in inches on drainage area. Total in acre-feet. 1912. January. . . a 30 a 26 136 104 69.0 32.6 13.6 8.62 8.11 0.069 .060 .315 .211 .160 .075 .031 .020 .019 0.08 .06 .36 .27 .18 .08 .04 .02 .02 1,840 1,500 February March 310 216 124 -18 17 10 8.9 37 72 48 18 10 7.6 7.5 8,360 6,190 4 240 April... May.. . June 1'940 July 836 August September. . 530 483 The period 25,900 1912-13. October. 12.1 20.8 16.1 67.5 206 243 104 29.4 32.5 11.2 23.4 744 November ! 1,240 December 990 250 1, 250 420 157 18 148 14 165 37 11 20 148 51 20 16 9 7 7 4,150 FebiTiary .... 11,400 March 14,900 6,190 May 1,810 June 1,930 July 689 August 1,440 September 1-5 20.8 206 The period 45,700 SANTA CLAEA RIVER BASIF. 487 SESPE CSEEK NEAR SESPE, CAUF. Location. — At Bradfields Camp, in Santa Barbara National Forest, three-fourths mile below mouth of West Fork of Sespe Creek, 4^ miles above intake of Fill- more canal, and 6^ miles northwest of Sespe, Ventura County. DRi^iNAGE AREA. — 216 square miles (measured by Ralph Bennett, consulting engi- neer). Elevation. — About 1,400 feet above sea level. Records available. — October 1, 1915, to August 3, 1918. Gage. — Painted on large boulder and on rock cliff on left bank. Discharge measurements. — Made from cable 250 feet above gage or by wading. Channel and control. — Bed composed of gravel and large boulders; fairly perma- nent. Extremes of discharge. — 1915-1918: Maximum stage recorded, 18.7 feet January 17' 1916 (discharge. 18,600 second-feet); minimum stage, 4.33 feet during Sep- tember and October, 1917 (discharge, 3.6 second-feet). Diversions. — No information. Regulation. — No information. Accuracy. — Stage-discharge relation not permanent. The flood in January, 1916, caused a slight scour in channel. Several fairly well-defined rating curves have been used. Gage read to hundredths; number of readings a day not known. Daily discharge ascertained by applying gage height, as reported, to rating table. Records good, except March 8 to August 3, 1918, which are only fair on account of changes in control. Cooperation. — Gage-height record and nearly all discharge measui'ements furnished by Sespe Light & Power Co. Discharge measurements of Sespe Creek near Sespe, Calif., for 1915-1918. 1915. Sept. 7 9 Nov. 3 Dec. 4 1916. Jan. 2 3 4 17 17 18 19 21 27 Mar. 10 Apr. 4 20 May 31 June 20 July 15 Sept. 14 29 Oct. 15 Not. 5 Dec. 10 1917. Jan. 6 28 Feb. 5 12 Made by — G. H. Killgore do ....do ....do G. H. KUlgore.. do. do. ....do ....do ....do ....do ....do do ....do ....do do do do do F. C. Ebert J. F. Waggoner. do ....do ....do J. F. Waggoner.. .do. F.C. Ebert J. F. Waggoner. do do do do do do do do Gage height. 5.06 5.62 Sec-ft. 10 .508 292 L,320 ),100 -.400 5,700 1,550 218 108 66 42 23 20 9.7 8.4 131 110 416 42^ 901 905 3,970 133 108 Aug. Sept, 1917. Apr. 15 21 28 Mav 5 12 19 26 Jimc 24 30 July 1 15 28 5 11 19 26 1 8 15 22 29 1918. Fob. 2 10 15 Mar. 1 9 16 24 30 Apr. 6 Junf. 16 23 30 July 7 14 Aug. 2 Made by— J.F.Waggoner do - ....do.... ....do.... ...-do.... ....do.... ....do.... ....do.... ....do.... ....do.... ....do.... ....do.... ....do.... .do ....do.... ....do.... ....do.... ....do.... ....do.-.. ....do.... ....do.-.. ....do.... ....do.... J. F. Russeil. do.. do.. do.. do.. do.. do.. do.. do.. do.. do.. .do.. ....do ....do F. C. Ebert height. Feet. 5.32 5.21 5.20 5.10 i.44 4.47 4.48 7.20 8.20 8.40 8..T0 7.60 6.80 5.10 4.85 4.75 4.75 4.70 4.60 Dis- charge. Sec.'ft. 66 60 62 48 36 31 4.94 31 4.58 10 4.-56 8.9 4. 53 8.6 4.48 7.0 4.43 4.3 4.41 4.6 4.3H 3.9 4.39 4.4 4.37 4.4 4.36 4.5 4. 33 3.7 4. 35 3.5 4. 34 3.8 4.34 3.7 4.34 3.9 4.36 4.3 8.4 7-5 421 623 475 433 53 51 17 488 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORITIA. Daily discharge, in second-feet, of Sespe Creeh near Sespe, Calif., for 1915-1918. r>ay. Apr. July. 1915-16. 1 2........ 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 605 560 144 110 106 850 440 119 480 228 253 8,100 11, 400 2,320 1,080 615 495 390 375 360 345 6,500 1,360 900 ?05 495 442 390 360 330 275 262 250 250 238 225 215 205 195 185 185 175 185 165 156 147 156 205 1,180 460 300 275 262 250 238 390 275 250 238 225 215 205 195 185 165 165 161 156 152 147 250 195 175 161 154 147 138 132 125 119 113 110 85 116 Note. — No gage-height record Apr. 30 to May 6; discharge interpolated. 31.. 26 21 22 65 96 240 86 47 25 8.5 5.5 122 21 24 64 94 228 81 41 24 8 5.5 27 24 38 88 94 205 81 39 23 8 5.5 35 24 36 99 90 174 80 37 21 8 5.5 26 23 34 94 85 163 80 42 21 8 5 52 23 26 99 82 154 79 33 20 8 5 58 24 25 87 86 144 78 33 20 8 5 36 24 24 79 81 127 78 33 19 8 5 35 .23 24 68 80 127 76 34 18 7.5 5 34 21 24 74 76 127 75 34 17 7 4.8 47 23 24 75 73 111 71 34 16 7 4.6 40 23 24 86 72 96 67 33 16 7.5 4.8 34 22 24 330 71 91 65 29 15 7 4.8 33 22 24 315 70 90 67 29 14 7 4.8 27 23 24 315 68 90 65 30 14 6.5 4.8 26 22 24 100 68 89 67 30 12 6 4.8 25 22 24 156 74 88 68 30 10 6 4.8 25 22 24 158 68 88 65 33 10 6 4.8 24 22 24 163 72 87 61 31 9.5 6 4.8 24 23 24 425 300 86 56 30 9.5 6 4.8 24 22 24 300 420 86 53 29 9.5 6 4.6 23 22 24 161 903 85 52 28 9.5 6 4.4 24 23 24 117 440 84 53 28 9.5 6 4.4 23 23 478 107 3,830 84 62 29 9.5 5.5 4.4 22 22 1,360 103 695 83 52 30 9 5.5 4.4 22 21 23 22 425 101 106 142 370 240 82 82 52 52 30 28 9 9 5.5 5.5 4.4 4.4 20 23 86 135 228 82 52 28 8.5 5.5 4.2 20 21 20 24 23 75 63 63 132 122 108 86 90 90 50 48 28 28 26 8.5 9 5.5 5 5 4.2 4.2 4.2 Note.— Discharge interpolated Mai-. 14-26 and Sept. 30. Daily disc harge, in second-feet, of Sespe Ore 3k near Sespe, Cal ^/.,> 1915- 1918- -Con. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1917-18. 1 . . 3.8 3.8 3.8 3.6 3.6 3.6 3.8 3.8 4.0 4.0 4.2 4.2 4.2 4.2 6 6 6 6 6 5.5 6 6 6 6.5 6.5 6 6 6 6.5 7 7 25 15 615 2,320 7,500 905 370 1,800 1,020 628 480 440 440 405 370 405 1,800 6,350 1,370 623 6,350 1,940 4,130 1,700 1,070 600 475 365 335 3,220 1,450 690 645 515 433 410 385 360 340 320 303 286 269 252 235 218 201 185 195 193 192 190 191 175 165 159 155 153 149 145 135 127 127 119 111 111 104 97 97 90 94 100 Ill 111 104 97 100 97 94 94 97 90 83 83 77 77 80 80 77 74 71 71 74 77 77 74 71 74 74 71 71 74 71 7^1 74 71 71 68 68 66 64 64 61 61 57 57 57 53 ■ 57 56 56 55 . 55 54 54 54 54 53 53 53 52 52 52 52 52 52 53 53 53 53 53 53 52 17 17 17 2 3 4 . . 5 6 . - 7 g 9 10 11 52 51 51 51 51 12 13 14 ... . 15 36 49 47 45 43 41 39 37 35 33 31 29 27 25 23 21 19 17 18 19 20 ■ 21 . . . . 22 23 24 25 6 6 6.5 5.5 5.5 6 6 26 . . 27 28 29 ... 30 31 Note.— No gage-height record Oct. 15 to Jan. 24. Discharge interpolated Mar. 24 to Apr. 5 and June 16 to Aug. 3. Monthly discharge of Sespe Creek near Sespe, Calif, for 1915-1918, [Drainage area, 216 square miles.] Discharge in second-feet. Per square mile. Depth in inches on drainage area. Total in acre-feet. 1915-16, October November Decem-ber January February March April May June July August September The year 1916-17. October November December January February March April May June July August >m The year. 18 20 111 11,400 1,180 390 116 50 33 23 18 27 18 18 18 46 147 110 51 33 21 18 16 16 18 18.8 25.3 1,320 294 193 78.8 39.4 25.8 19.8 16.9 16.5 0.083 .087 .117 6.11 1.36 .894 .365 .182 .119 .092 .078 .076 0.10 .10 .13 7.04 1.47 1.03 .41 .21 .13 .11 1,110 1,120 1-560 81,200 16,900 11,900 4,690 2,420 1,540 1,220 1,040 11,400 122 24 ,360 425 47 25 8.5 5.5 4.2 20 21 22 64 48 26 8.5 32.1 22.6 105 144 319 114 65.4 32.1 14.2 6.61 4.75 3.81 0. 149 .105 .486 .667 1.48 .528 .303 .149 .066 .031 .022 .018 0.17 .12 .56 .77 1.54 .61 .34 .17 .07 .04 .03 .02 1,970 1,340 6,460 8,850 17,700 7,010 3,890 1,970 845 406 292 227 3,830 70.4 4.44 51,000 490 SURFACE WATEE OF PACIFIC SLOPE, SOUTHEEIT CALIFORlsTIA. Monthly discJiarge of Sespe Creeh near Sespe, Calif., for 1915-1918 — Continued. Discharge in second-feet. Per square mile. Depth in inches on drainage area. Total in acre-feet. October 1-14 . . January 25-31 . February Miirch April May June July August 1-3 September 7,500 6,350 53 17 3.6 5.5 5.5 286 90 71 52 19 17 3.90 5.79 564 1,240 158 83.1 59.2 42.8 17.0 0.018 .027 2.61 5.74 .731 .385 .274 .198 .079 0.01 .01 2.72 6.62 .82 .44 .31 .23 .01 108 80.4 31,300 76,200 9,400 5,110 3,520 2,630 101 SESPE CREEK AT SESPE, CALIF. Location.— In NW. i sec. 25, T. 4 N., R. 20 W., at Southern Pacific Co.'s bridge 1^ miles above junction with Santa Clara River, and half a mile southeast of Sespe, Ventura County. Drainage area. — Not measured. Elevation. — About 450 feet above sea level. Records available. — August 31, 1911, to September 30, 1913. Gage. — Vertical staff in tv»^o sections, installed January 7, 1913; lower section is fastened to boulder in center of channel just below bridge; upper section is on left abutment of bridge. Original gage, at same datum, was an inclined staff in two sections on left bank at bridge. Channel and control. — Gmvel; will shift at high stages. Discharge measurements. — ^Made from railroad bridge or by wading. Diversions. — The Fillmore Irrigation Co.'s canal, which takes out about 4 miles above the station, furnishes water for irrigation and domestic use -at Sespe and Fillmore. Regulation.— No information. Accuracy. — Stage-discharge relation not permanent. Rating curves fairly well defined except for high water. Daily discharge ascertained by applying mean daily gage height to rating table. Records good for low and medium stages; high-water records fair. Discharge measurements of Sespe Creek at Sespe, Calif, for 1911-1913. Date. Made by— hefiS. Dis- charga Date. Made by- Gage height Dis- charge. 1911. Oct. 26 Lasley Lee Feet. 4.20 4.43 4.34 4.25 4.15 6.33 5.53 4.92 4.97 4.70 4.16 Sec.-ft. 7.0 19 12 9.4 5.0 1,510 246 83 94 52 9.2 r>ry. 1912. Dec. 4 1913. Jan. 7 29 Feb. 12 27 Mar. 7 Apr, 2 29 May 21 June 5 25 Aug. 13 F. C. Ebert Feet. 3.77 3.74 4.38 4.80 5.68 5.17 4.28 .3.98 3.58 3.53 3.32 Sec.-ft. 1.2 1912. FC. Ebert F. C. Ebert 1.3 Jan. 8 do do do do do 20 26 Feb. 3 28 Mar. 12 15 .....do do do do do 62 761 417 89 24 Apr. 24 May 13 do do do do do do 49 14 10 June 26 do do 4.1 Aug. 7 ... do . - - do . . Dry. Note— Dec. 4, 1912, point of zero flow determined to be at gage height about 3.3 feet. SAlay. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. 1912-13. 1.. . 1.5 2 2 2 1.5 2 2 2 2 2 2 2 2 2 4.5 3.5 3 2 3 3 3 3 3 3 3 3 3 2 3 3 3 2.0 1.5 .7 .6 1.5 1.5 1 .9 1.5 3 4.5 5 3.5 7.5 620 1,700 200 200 98 65 38 34 31 29 23 21 21 20 20 20 20 20 20 20 20 20 21 21 1,700 200 122 80 65 53 48 40 38 36 34 33 33 50 29 98 16,300 8,200 1,220 2,480 430 380 335 335 380 430 390 405 380 335 290 290 268 213 187 146 140 140 170 140 140 140 140 115 115. 115 104 104 94 94 86 86 81 81 81 81 81 81 78 78 71 71 67 67 64 71 71 71 67 67 64 64 50 50 46 46 50 52 50 46 50 46 44 40 40 40 40 40 52 40 40 30 30 23 21 21 18 16 16 14 14 14 12 11 9.5 9.5 9.5 9.5 9.5 9.5 9.5 9.5 9.5 7.5 7.5 9.5 9.5 9.5 30 21 14 9.5 9.5 9.5 9.5 9.5 6 6 . 4 4 4 2.5 2.5 2.5 2.5 2.5 2.5 1.5 2.5 14 6 6 6 7 2 . 3 4 5 6 7 8 9 10 11 3.0 12 13 14 15 16 17 18 .3 .2 .9 3.0 - 3.5 1.5 .9 1.5 1.5 1.5 1.5 2 2 19 20 21 22.. . . 23 24 25 26 27 . ... 28 29 30 31 Note, — Daily discharge determined from well defined rating curves applicable as follows: Nov. 11, 1912, to Feb. 24, 1913; Feb. 25 to July 1, 1913. No flow July 2 to Sept. 30. Discharge Feb. 24 and 25 esti- mated from extension of rating curve; records only approximate. Monthly discharge ofSespe Creeh at Sespe, Cal if , for 1911-1913. Discharge in second-feet. Run -off (total in acre- feet). Month. Discharge in second-feet. Run-off (total Month. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. in acre- feet). 1911. September 12 7.0 8.84 526 1912-13. October November December January February March 0.0 3.5 4.5 1, 700 16,300 430 81 52 30 .7 .0 .0 0.0 .0 1.5 .6 20 86 46 9.5 1,5 .0 .0 .0 0.00 .78 2.52 103 1,120 216 64.8 22.6 7.70 .02 .00 .00 46 155 6,330 1911-12. October 17 17 23 21 11.3 2,280 1,700 80 19 2.3 .0 .0 6.4 9.2 13 11.3 7.0 7.0 58 21 2.3 .0 .0 .0 10.7 12.2 18.5 17.0 9.65 428 244 47.1 8.13 .59 .00 .00 658 726 1,140 1,040 555 26,300 14,500 2,900 484 36.3 .0 .0 November December 62,200 13,300 3,860 February March Mav . . . 1 390 458 April July 1 May August September The year... June .... July 16,300 .0 121 87,700 September The year 2,280 66.7 48,300 SANTA PAULA CREEK NEAR SANTA PAULA, CALIF. Location. — At east boundary of Ojai grant, in Santa Barbara National Forest, just below mouth of Sisar Creek, half a mile above Onlauf Canyon, 6 miles above junction with Santa Clara River, and 5| miles northwest of Santa Paula, Ventura County. Drainage area. — 33.4 square miles (measured on topographic maps). U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 447 PLATE XVII VIEWS AFTER FLOOD OF 1914. A, Arroyo Seco uear Los Augeles, Calif. ; B, Ventura River near Ventura, Calif. ; C. Santa Paula Creek near Santa Paula, Calif. U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 447 PLATE XVIII ^^^^ '^•^^^^^'SMik. .^ '■ A, SAN DIEGO RIVER AT MISSION DAM, NEAR SANTEE, CALIF., AFTER FLOOD OF 1916. B. GAGING STATION ON COTTONWOOD CREEK NEAR DULZURA, CALIF. C DULZURA CONDUIT AT BARRETT DAM SITE, CALIF. SANTA CLAEA EIVEB BASIN. 493 Elevation. — About 950 feet above sea level. Records available. — March 24, 1912, to September 30, 1913. Gage. — Vertical staff fastened to tree on left bank, about 600 feet below mouth of Sisar Creek. Discharge measurements. — Made from highway bridge 1 mile below gage or by wading. (See PI. XVII, C.) Channel and control. — Boulders and gravel ; shifts at high stages. Diversions. — No information. Regulation. — No information. Accuracy. — Stage-discharge relation not permanent. Rating curves fairly well defined except for high water. Daily discharge ascertained by applying mean daily gage height to rating table. Records good for low and medium stages; high-water records fair. Discharge measurements of Santa Paula Creek near Santa Paula, Calif. Jor 1911-1913, Date. Made by — Gage height. Dis- charge. Date. Made by — Gage height. Dis- charge. 1911. Oct. 27 F. C. Ebert Fee*. 2.40 2.40 2.43 2.41 3.07 2.70 2.88 2.62 2.39 2.27 2.27 Sec.-ft. 4.9 4.8 4.9 4.7 39 17 26 13 6.3 3.1 2.9 1912. Dec. '3 1913. Jan. 31 Mar. 1 7 Apr. 30 May 22 June 5 24 Au?. 13 F. C. Ebert Feet. 2.33 2.42 3.92 3.80 3.26 3.26 3.07 3.11 2.97 Sec. ft. 2 9 27 Lasley Lee F.C. Ebert do do do do do do do 1912. Jan 6 F. C. Ebert .... 5.2 83 Feb. 2 Mar. 14 24 Aj)r. 24 May 14 June 25 Aug. 5 20 do do do.. do do do do H. D. McGlashan 66 13 7.5 7.4 5.3 2.6 Daily discharge, in second-feet, of Santa Paula Creek near Santa Paula, Calif, for 1912-13. 11., 12., 13., 14., 15., 16., 17., 18., 19., 20.. 21., 22.. 23., 24., 25., Mar. Apr. May. June. July. Aug. Sept. 17 80 158 104 34 22 22 17 34 50 80 34 34 34 130 34 180 28 12 12 12 12 12 12 8.5 8.5 8.5 8.5 8.5 8.5 7.0 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 5.5 7.0 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 3.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 6.5 5.5 5.5 5.5 5.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 3..2 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 Note.— Daily discharge determined from a rating curve well defined between 10 and 80 second-feet. 494 SUEFACE WATER OF PACIFIC SDOPB, SOUTHERN CALIFORl^IA. Daily discharge, in second-feet, of Santa Paula Creek ne-ar Santa Paula, Calif., for 1912-13— GontimiGd. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1912-13. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 1.5 1.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 3 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 3 3 2.5 2.5 2.5 2.5 2.5 2.5 2,5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 5 5 22 22 17 17 12 8 6.5 5 5 5 5 5 5.5 5.5 6.5 6.5 12 12 168 168 152 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7 7 6.5 6.5 5.5 5.5 5.5 5.5 5.5 5.5 5 5 5 5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3 3 3 3 3 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 Note. — Daily discharge determined from rating curves applicable as follow: Oct. 1, 1912, to Feb. 23, 1913, fairly well defined below SO second-feet; Feb. 26 to May 17, fairly well defined. Discharge Feb. 24 and 25, estimated. Monthly discharge of Santa Paula River near Santa Paula, Calif., for 1912-13. [Drainage area, 33.4 square miles.] Discharge in second-feet. Rim-o3. Month. Maximum. Minimum. Mean. Per square mile. Depth in inches on drainage area. Total in acre-feet. March 24r-31 34 158 28 12 5.5 4.5 3.2 17 17 12 5.5 4.5 3.2 3 2 23.8 42.8 16.1 8.50 5.40 3.50 3.20 0.713 1.28 .482 .254 .162 .105 .096 0.21 1.43 .56 .28 .19 .12 .11 378 April.. . . 2,550 May 990 506 July . . 332 August 215 September 190 The period 5,180 1912-13. October... . 2.5 3.0 4.5 187 1,560 80 23 13 7.5 5.0 3.0 2.0 1.5 2.0 2.5 2.5 5.5 10 16 7.5 5.0 3.0 2.5 2.0 2. 44 2.52 2.53 13.4 98.1 34.2 17.4 9.29 6.37 4.13 2.60 2.00 .073 .075 .076 .401 2.94 1.02 .521 .278 .191 .124 .078 .060 .08 .08 .09 .46 3.06 1.18 .58 .32 .21 .14 .09 .07 150 November December 150 156 January 824 February . . 5,450 March 2,100 April.... 1,040 May . . 671 379 July 254 August 160 September 119 The year. 1,560 1.5 16.7 .470 6.36 11,400 SANTA CLARA RIVBE BASIN. 495 MISCELLANEOUS MEASUREMENTS. Measurements of stream flow in the Santa Clara River basin at points other than those at which gaging stations have been main- tained are recorded in the following table: Miscellaneous /neasuremenis in Santa Clara River drainage basin, 1895-1917. Tributary to— Locality. Aug. 9,1898 Aug. 19,1899 Oct. 8,1900 Apr. 30,1903 June 16,1903 Sept. 16, 1903 Oct. 19,1905 June 18,1898 Aug. 11,1898 Aug. 19,1899 Apr. 30,1903 Jiine 17,1903 Sept. 16, 1903 Oct. 19,1905 Mar. 15,1899 Aug. 18,1899 May 3, 1903 June 22,1903 July 16,1903 Aug. 13,1903 Sept. 18,1903 Oct. 21,1905 Aug. 14,1903 Sept. 18,1903 Oct. 21,1905 Jime 4, 1913 Aug. 13,1913 Oct. 21,1913 Jan. 2,1914 Sept. 18,1914 Oct. 11,1912 Nov. 6, 1912 Dec. 4,1912 Jan. 7, 1913 June 25,1913 Apr. 30,1903 Santa Clara River. . do do do do do do Pacific Ocean. do do do do -do.. ..do., -do.. ..do.. ..do.. ..do.. ..do.. ..do.. ..do.. ..do.. ..do.. ..do.. ..do.. ..do.. ..do.. ..do.. ....do ....do..... ....do ....do ....do ....do ....do ....do ....do ....do ....do ....do ....do ....do ....do ....do ....do ....do Newhall ranch. ....do ....do ....do.. ....do ....do ..ao.. .do., .do., .do.. .do., -do.. ....do ....do ....do ....do ....do -do., .do.. ..do., .do., .do.. June Sept. Oct. Aug. Aug. Oct. Jan. Apr. Mar. Jan. Jan. Aug. Mar. Mar. Mar. Aug. Oct. May 10, 16, 1903 19, 1905 11,1 — 13,1913 21,1913 2,1914 8,1914 10, 18 21,18 31,18 11,18._ 14,1899 16, 1899 19,„.. 8, 1900 1,1903 Do June 17, 1903 Sept. 17,1903 June 17, 1903 Oct. 20, 1905 Do Sept. 3,1911 Oct. 21,1913 Jan. 3,1914 Sept. 18, 1914 Dec. 25.1916 do do do do San Franeisquito . Creek. do do do do do .....do do Castaic Creek Piru Creek . ....do ....do ....do ....do ....do ....do ....do ....do do do..... do do do ....do do do do do do....... do Santa Clara. River. do do do..„... do...... do do do do .do. .do. .do. .do. .do. .do. .do. .do. .do. .do.. do. do. .do. .do- .do.. .do.. ..do.. ..do -.do ..do ..do ..do -do 1 mile east of Camulor.. do do -do.. ..do., -do.. ..do.. In cienaga, 1 mile east of Fillmore . Near Santa Paula ...-do do. ..do.. ..do-. Below head of Santa Clara Water & Irrigation Co. 's canal. do. ..do.. Above mouth of San Fran(Hsquito Creek at Castac. do !"!do!!l!;!!!!!!!!!!!!!!!!!!!!!!! Discontinued U. S. G. S. gagiag- station at Fillmore, Calif, do. -do., .do., .do.- Road crossing, Newhall ranch.. ....do ....do ....do Near mouth ....do ....do.. ....do Southern Pacific Co.'s bridge near mouth. Robertson mill Smith's ...do French house Narrov/s near Dutton's Road crossing, Piru do Head of Piiu pipe line Ditches from lower creek Dunton ranch Southern Pacific Co.'s bridge ...do do 1 mile above Esperanza ...do 1 mile above Piru 900 feet above Southern Pacific Co.'s bridge, Piru. Abandoned U. S. C S. gaging sta- tion, Piru. !!do"! N.W. i sec. 13, T. 6 N., R. 18 W., opposite U. S. G. S. benchmark "2060", about 4 miles below mouth of Canada de los Alamos. 496 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Miscellaneous measurements in Santa Clara River drainage basin, 1895-1 9 17~Cojitm\ied. Date. Stream. Tributary to— Locality. Dis- charge. Dec. 15,1896 Gorman Creek Sespe Creek Piru Creek Below Gorman Station Secf.^ Aug. 11,1898 Santa Clara River. . . 2 5 Mar. 15,1899 ....fdo Head of "Water Co.'s canal 8 3 Aug. 18,1899 do do do do do do do 1 9 May 2, 1903 Sept. 17, 1903 do do Southern Pacific Co.'s bridge Below canal intake 89 , 1 Oct. 20,1905 do do do 4.8 Oct. 21,1913 b Jan. 4, 1914 do ..do do 29 Jan. 5,1914 do do do 28 Apr. 12,1914 Mav 26,1914 do do do do do do do 1,000 feet above Southern Pacific Co.'s bridge. :■ Near Sespe 140 81 Do Sespe 57 June 11,1916 do 14 Apr. 3, 1916 do do Railroad bridge Sespe 127 May 2, 1910 June 11,1916 do Hot Springs Creek.. Alder Creek do Sespe Creek do ' Mouth 41 2 5 Do do 1.2 Mar. 2, 1916 West Fork of Sespe. Creek. ....do ....do Mouth. . 13 Mar. 13,1916 ....do ^ ....do 11 Mar. 28, 1916 .. .do . do . .do 5 9 Apr. 20, 1916 ....do ....do ....do 5.5 Apr. 24, 1916 May. 24,1916 ....do .. .do .do 5.4 ....do ....do ....do 3.4 June 20,1916 Sept. 14,1916 Jan. 4,1917 Feb. 5,1917 Mar. 3, 1916 Mar. 13,1916 Apr. 1,1916 Apr. 21, 1916 May 30,1916 Sept. 14,1916 Mar. 7, 1916 ....do .. .do.. . . .. .do.. 2.5 do . do . do 1 5 ....do ....do ...do 10 do . do do 8.9 Tar Creek ....do ....do 14 do .. do.. do . 9.8 ....do ....do ....do 5.3 ...do do..' ... . do 2 ....do ....do ...do .5 ....do Coldwater Creek ....do ....do do . ....do do 2 Mar. 14, 1916 Jan. 4,1917 Feb. 6,1917 Mar. 7,1916 Mar. 14, 1916 ....do ...do 1.6 do .. .do.. do.. 2 ....do ....do ....do .6 Pine Creek .. .do .do 6.1 do . ... do . do . 5.4 Mar. 31,1916 do ....do ....do 4.2 Feb. 6,1917 Mar. 7,1916 Mar. 14, 1916 do do . .do 1.7 Little Sespe Creek... do do do 4 ...do ....do 3.3 Mar. 23,1916 Sept. 14,1916 Jan. 4,1917 Feb. 6,1917 Aug. 18,1899 May 3,1903 Do---.-.. do . . do . do 2,1 do ....do ....do i>0 do . do ...do 2.8 do ....do One-fourth mile above mouth Above Neeper schoolhouse 5 miles above Santa Paula Santa Paula 1.3 Santa Paula Creek. . . .do Santa Clara River. . . ....do .85 28 do ....do 19 Oct. 21,1905 do ... do . . . 3 miles above Santa Paula Abandoned U. S. G. S. gaging station, Santa Paula, do 4.9 Oct. 21,1913 ....do do ....do 1.5 Jan 5 1914 do 7.3 Apr. 8,1914 May. 30,1914 Oct. 27,1911 Jan. 6, 1912 Feb. 2, 1912 Mar. 24,1912 May 14,1912 Aug. 5,1912 Aug. 20,1912 Dec. 3,1912 Jan. 31,1913 do ...do .. do 35 do . . do. do 17 Sisar Creek Santa Paula Creek . . do ... Near mouth, just above U. S. G. S. gaging station on Santa Paula Creek, SW.i NW. J sec. 16, T. 4 N., R. 21 W. ..do. 1 do 1.2 do do do 1 do do ....do 6.1 do do .do 2.9 do do ....do a. 3 do . . do . ...do .5 do do .do 05 do do ....do .9 Mar 1,1913 do do ..do 16 Mar. 7,1913 do . .do ....do 9.1 Apr. 30,1913 May 22,1913 Tune 5 1913 do do ...do 2.4 do do .do 1.4 do do do 1.6 June 24,1913 Aug. 13,1913 Oct 21 1913 do . ... do ....do .9 do do do .4 do do Near Santa Paula 09.1 Jan. 5,1914 Apr. 8,1914 May. 30,1914 do do ...do 8 do do.. ...do 10 do do do 4.2 b Stream dry. SANTA CLARA RIVER BASIF. 497 Miscellaneous measurements of diversions in Santa Clara River drainage basin for 1899-1918. Date. Name. Diverts from— Locality. Dis- charge. Aug. 19,1899 Oct, 8 1900 Camulos ditch . do ..... . . Santa Clara Pviver. . . . do 1,000 feet belov/ intake. 1 mile above Camulos. Head of wooden flume . . Sec.-ft. ■ 17.6 11.4 Tune 17,1903 ....do do Head 7.6 Sept. 16, 1903 Oct 19 1905 . do ..do do 11.6 do do 1,000 feet below head 7.6 Aug. 18' 1899 June 22 1903 ...do 16.0 -do.. . . . do 1 mile above Santa Paula .... 7.8 July 16.1903 Aug. 13' 1903 do ....do do 8.4 .. do . do do 8.6 Sept. 18, 1903 Oct. 21,1905 do do .. . . . do 8.6 . do . do do 7.2 May 13,1912 June 7, 1913 Fillmore Irrigation Co.'s ditch. .do Sespe Creek . One-fourth mile below intake, which is 4miles above U. S. G. S. gaging station on Sespe Creek, near Sespe. About 500 feet below intake, in sec. 1, T. 4N.,R. 20 W. One- fourth mile below intake At headgate near Sespe 3.5 . do . .. . . 17.0 Feb. 6, 1917 do . . .do 1.5 May 26,1914 Sept. 14, 1916 May 2,1917 Aug. 2,1918 Aug. 18,1899 June 22,1903 July 16,1903 Aug. 13,1903 Sept. 18, 1903 Oct 21 1905 Fillmore Land & Water Co.'s canal. do do . do 17.0 do . do do 12.0 . do 14 do . do 1,000 feet below intake 20 Grees ditch Santa Clara Kiver. 8.6 do do 1 mile above Santa Paula 11,0 . do do do 5.8 . do . do . do 11.1 do do do 7.4 . do . do . do 9.2 June 16,1903 Sept. 16, 1903 June 17,1903 Newha 11 ditch , do do ... .do.. Southern Pacific Co.'s bridge do 1.7 1,8 Pirn Ivand & Wa- ter Co.'s upper di- version. . do Piru Creek Near Esperanza 1.8 Sept. 17, 1903 Oct. 20,1905 .do . do 1.2 .. do do do 1.4 June 17,1903 Sept. 17, 1903 Aug. 18,1899 .Tune 22,1903 July 16,1903 Aug. 13,1903 Sept. 18, 1903 Jan. 25,1912 Piru Land & Water Co.'s lower diversion, do . do Southern Pacific Co.'s bridge .. .do 3.7 . do 1 Richardson ditch — do do Santa Clara River. .. 5.8 do . do ... . 4.2 ... do... . . 2 3 . do . .do do 1.2 . do . do . . do 1.2 Piru Creek Above Southern Pacific Co.'s bridge at Piru. .. do... 5.5 Nov 7 1912 do.. do. 4.6 Dec 4' 1912 do do do 3.1 May 23,1913 June 26,1913 July 15,1903 July 16,1903 Auo- 14 1903 . do . do... ...do 6.6 do do . .do ... 6.5 Santa Clara Water & Irrigation Co.'s canal. do Santa Clara River. . . .. .do Head 30.0 do 33.0 do. do .do 31.6 Sepi;. 18, 1903 1905 . do . do .. .do 26.7 . do do ... . Head, measured over weir Head 16.7 May 3, 1903 June 22,1903 Sept. 18, 1903 Sept. 17,1903 Oct. 20,1905 Santa Paula Water Co.'s ditch, .do .. Santa Paula Creek . . , do 5.6 . do 10.1 do Sespe Land & Wa- ter Co'.s canal. do do . ...do 2.7 Sespe Creek . One- half mile below intake .....do 4.6 do 6.6 142131 ° — 21— w SP 447- -32 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. VENTURA MVER BASIN. GENERAL FEATURES. Ventura Eiver drains a small area lying almost wholly in Ventura County. The river rises in the eastern part of Santa Barbara County and flows in general southeastward to Matilija, where it turns and takes a course more nearly south to its entrance to the Pacific at Ventura. GAG^IHG-STATION RECORDS. VEWTTJRA RIVER KEAR ]SrORBH:OFF, CALIF. Location.— In N. ^ SW. i sec. 28, T. 5 N., R. 23 W., just below junction of MatUija and North Fork of Matilija creeks and about 4 miles northwest of Nordhoff, Ven- tura Counly. Drainage area. — 19.9 square miles (measured on topographic maps.) Elevation. — About 900 feet above sea level. Records AVAILABLE. — October 23, 1911, to October 31, 1914, Gage. — Original vertical staff in three sections on right bank about 300 feet below junction of creeks; gage destroyed by flood of January, 1914. A new vertical staff, at an independent datum, installed March 17, 1914, about 50 feet betow original site. Discharge measurements. — Made from cable about 200 feet below gage or by wading; equipment washed out February 20, 1914. Channel and control. — Gravel and boulders; shifts during high water. Extremes of discharge. — 1911-1914: Maximum stage probably about 15 feet Feb- ruary 20 or 21, 1914 (discharge unknown); minimum stage recorded, 1.90 feet October 1 to 3 and 13 to 18, 1913 (discharge, 2.5 second-feet). Diversions. — Sheldon flume diverts water from North Fork of Matilija Creek above the station during the irrigation season. See miscellaneous measurements for discharge of flume. Regulation. — No information. Accuracy. — Stage-discharge relation not permanent. Rating curves well defined except for flood stages. Daily discharge ascertained by applying mean daily gage height to rating table. Records good. Flood discharge of 1914 not computed. Discharge measurements of Ventura River near Nordhoff, Calif., for 1911-1914. Made by — Oct. Dec. height. Dis- charge. Date. Feet. See-ft. 1913. 2.18 11 Jan. 30 2.18 11 Feb. 28 Mar. 8 2.27 14 Apr. 28 May 22 2.20 11 June 25 2.16 11 Aug. 14 3.32 71 Oct. 22 2.87 35 2.90 32 1914. 2.50 20 Jan. 16 2.19 10 Feb. 13 1.90 5.3 Mar. 17 1.90 4.0 Apr. 9 May 30 L90 4.1 L93 5.0 Sept. 19 Made by— F. C. Ebert. -...do.... do.... do do.... ...do.... ...do.... ...do.... F. C. Ebert ....do... ....do... ....do... ....do... ....do... Gage height. Feet. 2.28 4.54 a 86 2.83 2.62 2.40 2.07 1.94 2.67 4.93 2.67 2.28 1.67 1.17 Dis- charge. Sec.-ft. 11 183 96 20 13 7.8 4.0 2.8 14 151 178 102 Note.— Measurements beginning Mar. 17, 1914. refer to new gage at new site and datum. VENTURA RIVER BASII?". 499 Daily discharge, in second-feet, of Ventura River near Nordhoff, Calif., for 1911-1914. 21.. 22-. 23-. 2i.. 25.. 30-. 31.. Apr. 14 13 12 11 10 10 10 10 10 10 10 10 10 9.2 9.2 9.2 8.5 July. 8.5 9.2 9.2 8.5 8.0 7.6 7.& 7.0 7.0 6.4 6.0 6.0 3.0 5.7 5.7 5.7 5.7 5.7 5.7 5.7 5.2 5.2 5.2 5.2 5.2 5.2 5.2 4.8 4.8 4.8 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.3 4.3 4.0 4.0 4.0 4.0 4.0 4.0 4.0 Sept. Note.— Daily discharge determined from fairly well defined rating curves applicable as follows: Oct. to Dec. 3, 1911, and Jan. 1 to Sept. 30, 1912. 1912-13. 1 2 4 4 5 6 9 10 11 12 13 14 15 16 .. 17 18 19 20 21 22.... 23 24 25 26 27 28 29 30 31 3.5 4.5 4.5 5.5 12 170 39 20 12 8.0 5.5 3.5 4.5 5 5.5 12 155 33 20 12 7.5 6.5 4.5 4.5 5 5.5 12 128 28 20 11 7.5 5.5 4.5 4.5 5 5.5 12 109 28 20 11 7 5.5 4.5 4.5 5 5.5 12 98 28 20 11 7 5.5 4.5 4.5 5 5.5 12 93 28 20 11 6-5 5.5 4.5 4.5 5 5.5 26 93 28 19 11 6.5 5.5 4.5 4.5 5 5.5 168 88 28 19 11 6.5 5 4.5 4.5 5 6 57 88 26 19 11 6.5 5 4.5 5 5 6 40 88 23 19 10 6 5 4.5 5 5 6 32 79 23 19 10 6 4.5 4.5 5 6 28 70 23 19 10 5.5 4.5 4.5 5 6 26 62 23 19 10 5.5 4.5 4.5 5 8 24 62 23 16 10 5,5 4.5 3.5 4.5 5 56 24 58 23 16 10 5.5 4.5 3.5 4.5 5 106 22 54 23 16 10 5.5 4.5 3.5 4.5 5.5 63 20 54 28 15 10 5.5 4.5 3.5 4.5 5.5 32 20 54 28 14 10 5.5 4.5 3.5 4.5 5.5 24 20 54 28 14 10 5.5 4.5 4.5 5.5 20 20 54 28 14 10 5.5 4.5 4.5 5.5 18 20 54 28 14 10 5.5 4 4.5 5.5 18 20 50 28 13 10 5.5 4 4.5 4.5 5.5 16 26 sa 28 13 9 5.5 4 4.5 4.5 5.5 16 764 50 23 12 9 5.5 4 4.5 4.5 5.5 16 664 50 23 12 8.5 5.5 4 4.6 4 5 5 5 15 15 452 296 46 42 23 21 12 12 8.5 8.5 5.5 5.5 3.5 3.5 4.5 4.5 5.5 4 5 4.5 4 5 5.5 5.5 5 5 14 14 14 12 201 42 39 39 39 21 20 20 12 12 12 12 5.5 8 8 5.5 5.5 5.5 5.5 3.5 3 3.5 3.5 4 5 4 5 4 5 4.5 5.0 Note.— Daily discharge determined from rating curves applicable as follows: Oct. 1, 1912, to Feb. 24, 1913, fairly well defined below 200 second-feet (same as used for June 1 to Sept. 30, 1912, extending into high water); Feb. 25 to Sept. 30, 1913, well defined below 300 second-feet. 500 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Ventura River near Nordhoff, Calif., for 1911-1914- Continued. Day. Apr. July. Aug. 1913-14. 1 2 , 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 2.5 2.5 2.5 2.5 2.5 2.5 3.0 3.0 3.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 3.0 3.0 3.0 3.0 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 4.0 4.5 174 174 163 163 152 152 142 142 142 142 142 142 142 142 142 12 10 10 10 10 10 10 10 10 10 10 10 10 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 8.5 Note. — No record Jan. 17 to Mar. 16. Monthly discharge of Ventura River near Nordhoff, Calif., for 1911-1914. Discharge in second-feet Maxi- Mini- mum, mum. Run-off (total in acre- feet). Discharge in second-feet. Maxi- mum. Mini- mum. Run-off (total in acre- feet). 1911-12. October 23-31... November December January February March April May June July August September The period. 1912-13. October November December January February March April 14 13 27 14 12 395 161 29 15 9.2 5.2 4.5 106 764 170 39 12 12 10 12 27 16 8.5 5.2 4.0 3.7 3.5 4.5 5.5 5.5 12 39 20 12.6 12.2 14.7 12.9 11.5 71.3 45.8 22.0 12.0 6.48 4.40 4.18 4.18 4.53 5.23 17.8 109 71.4 25.8 225 726 904 793 662 4,380 2,730 1,350 257 270 322 1,090 6,050 4,390 1,540 1912-13— Con. May June July August September The year... 1913-14. October November December January 1-16... March 17-31.... April May June July August September 1914. October 20 12 5.5 3.5 174 142 63 34 23 5.5 3 2.5 15.9 10.0 5.97 4.48 2.95 22.5 2.5 3.5 9 34 26 16 2.68 13.5 11.5 32.0 150 88.8 52.2 29.6 18.8 13.8 10.0 367 275 176 16,300 165 803 707 1,020 4,460 5,280 3,210 1,760 1,160 848 595 VENTURA RIVER BASIN. 501 VENTURA RIVER NEAR VENTURA, CALIF. Location. — Near southeast corner of Santa Ana grant, at highway bridge in Foster Memorial Park, below Ventura Water Co.'s diversion dam, one-fourth mile below mouth of Coyote Creek, three-fourths mile above Weldon Canyon, and about 5 miles north of Ventura, Ventura County, and mouth of river. Drainage area. — Not measured. Elevation. — About 200 feet above sea level. Records available. — September 4, 1911, to January 17, 1914. Gage. — Chain gage fastened to downstream side of bridge; destroyed by flood in January, 1914. Discharge measurements. — Made from bridge (destroyed by the flood of January, 1914) at gage or by wading. (See PI. XVII, B, p. 492.) Channel and control. — Gravel and boulders; shifts during high water. Extremes of discharge. — 1911-1914: Maximum stage recorded, 9.0 feet at 11 a.m. February 24, 1913 (discharge, computed from extension of rating curve, 3,940 second-feet; undoubtedly discharge has been higher); minimum stage recorded, 1.3 feet December 30, 1912, to January 5, 1913 (discharge, 2 second-feet). Diversions. — Diversion for irrigation from main river and tributaries above the statiori. Pipe line for irrigation and municipal water supply in the vicinity of Ventura heads just above the dam. Regulation. — No information. Accuracy. — Stage-discharge relation not permanent. Rating curves fairly well defined. Daily discharge ascertained by applying mean daily gage height to rating table or by shifting-control method. Records usually good except for high water. Discharge measurements of Ventura River near Ventura, Calif., for 1911-1914. Date. Made by— Gage height. Dis- charge. Date. Made by- Gage height. Dis- charge. 1911. Oct 24 F C. Ebert Fed. 1.70 1.70 1.72 1.64 1.50 2.81 2.59 2.05 2.11 1.81 1.52 1.40 1.38 Sec.-ft. 18 18 21 16 12 220 136 50 54 25 11 5.3 4.8 1912. Oct. 8 Dec, 2 1913. Jan. 30 Feb. 28 Mar. 7 Apr. 29 M^ay 22 June 25 Aug. 14 Oct. 23 1914. Jan. 5 F.C Ebert . .. Feet. 1.35 1.37 1.52 2.84 2.23 1.74 1.73 1.63 1.52 1.40 1.48 Secf,. 24 liasley Le F. C. Ebe do F.C, Ebert. 3.4 1912. Jan. 5 rt 9 Feb. 3 28 Mar. 13 ]4 23 Apr. 23 May 15 June 24 do.... do.... do.... do.... do.... do.... do.... do.... ... do do do do .....do do do 308 106 19 14 9.3 7.5 4.3 Aug. 6 20 do.... do.... F.C. Ebert.... 7.2 Daily discharge, in second feet, of Ventura River near Ventura, Calif, for 1911-1914. Day. Sept. Day. Sept. Day. Sept. 1911. 1 1911. 11 23 23 23 23 21 20 21 18 14 20 1911. 21 18 2. . 12 . . 22 20 3 13 23 21 4 23 23 23 23 23 23 a 23 14 24 20 5 15 25 20 6 16 26 20 7 17 27 18 8 18 28 21 9 19 20 29 21 10 30 21 a Discharge interpolated. 502 SURFACE WATER OE PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Ventura River near Ventiam, Calif, for 1911-1914 — Continued, Day. 1911-12. 1.... 2 3 4 5 e. s'.'.'.'.'.'.'.'.'.. 9 ,... 10 11 12 ,. 13 11 15 16 17 18 19 29. 21 22 • 23 24 25 26 27 28 29 30 31 12 12 12 14 335 375 105 70 70 205 87 890 199 125 105 Apr, 300 162 125 105 96 96 78 70 67 62 5a 55 May 16 16 16 16 16 18 16 17 17 17 14 14 8.5 6.8 6.8 8.5 8.-5 7.7 7.7 9.0 JuJy. 8.5 6.5 6.5 8.5 6.5 6.5 5.6 5.& 5.6 5.6 5.0 5.0 5.0 5.0 5.0 5.0 5.0 6.5 Axj^., 6.5 6.5 6.5 5.0 5.0 5.0 5.0 3.8 3.8 3.8 3.8 4.5 4-. 5 5.0 5.0 5. a 5.0 5.0 4.5 3.8 3.8 3.8 3.0 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2;5 2,^ 2.5 3.8 5. a 4.5 3.8 3.8 3.8 2. 5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 a 2. 5 a 2. 5 Note. — Daily discharge determined from fairly v/ell defined rating curves applicable as follo-wsr 4 toDec. 31, 1911, and Jan. 1 to Sept. 30, 1912. 1912-13. 1 2 3. , 4 5..... 6.. 7 8. 9 10 11. 12.... 13 14... , 15 16 , 17 18 19 20 21 22 23..... 24 25 26 27 , 28.... 29 30 31 a4 r a5 2 8 220 37 21 10 12 12 a 4 5 5 2 8 186 37 21 10 12 12 a4 5 5 2 8 154 37 21 10 12 8 a 4 5 5 a2 8 125 37 21 10 12 8 a 4 5 2 8 125 37 21 10 12 8 o 4 5 5 3 8 111 37 22 10 12 8 a 4 5 5 18 111 37 22 10 12 9 5 5 535 97 37 22 10 12 9 5 a 300 97 37 24 10 12 9 5 62 97 31 24 10 12 10 5 49 84 31 23 10 12 a 10 5 33 77 31 23 10 12 a 9 5 33 72 31 22 10 12 a 9 5 5 29 72 31 21 10 12 9 5 175 25 72 31 21 10 12 a 9 5 105 25 62 31 19 10 12 a8 5 96 25 62 31 19 10 12 a8 5 55 22 72 31 17 10 12 o7 5 33 22 72 31 17 10 12 v7 5 25 22 62 31 16 10 12 aQ 5 24 22 62 31 16 10 12 6 5 22 22 52 31 13 10 12 6 5 18 25 52 25 12 10 12 6 5 18 3,200 52- 25 12 12 12 & 5 13 1,950 52 25 12 12 12 6 5 13 615 52 23 12 12 12 6 5 13 485 52 23 12 12 12 6 5 13 290 52 23 10 12 12 6 & 13 44 21 10 12 12 6 5 2 10 44 21 10 12 12 6 2 8 37 10 12 6 Sept. a Gage not read; discliarge interpolated. ISToTE. — Daily discharge determined as follows: Oct. 1, 19.12,.to Feb. 24, 1913, from: fairly well defined rating curves (same as used for Jan. 1 to Sept. 30> 1912); Feb. 25 to May 5, 1913, and June 29 to Sept. 30, 1913, from curves fairly vi^ell defined below 400 seconds feet; May 22 to June 28, 1913, from fairly well defined curves, May 6 to 21, 1913, by indirect method for shift- ing control; Oct. 1 to 7, 1912, estimated; Feb. 24 and 25 estimated by extension of rating curves; records are only approximate. Discharge interpolated for other days for which record is not given. VENTURA RIVER BASIIif. 50S Daily discharge, in second-feet, of Ventura River near Ventura, Calif ., for 1911-1914 — Con. Day. Oct. Nav. Dec. Jan. Day. Oct. Nov. Dec. .Tait-. 1913-14. 1 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 27 12 8 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 6.5 6.5 8 8 8 8 8 8 8 8 8 8 8 8 100 1913-L4, 16 5 5 5 5 5 5 5 5 5 5 5 4.5 \ 4 6.5 5 5 44 17 8 8 6.5 6.5 6.5 6.5 8.5 5.5 5 5 5 5 & 5 5 5 12 8 6.5 6,5 6.5 6.5 6.5 6.5 6.5 6.5 445 2 17 125 3 18 19 4 5 . ... 20 6.,.. 21 22 7 . .. 8 23 24 25 26 27 28 9 .. ... 10 11 12 13 14 29 15 30 31 Note.— Discharge determined from a well-defined rating curve, polated; that of Jan, 15 estimated from statioQ at Nordhofl. Discharge Dec. 25 and Jan. 1 inter- Monthly discharge of Ventura River near Ventura, Calif, for 1911-1914- 1911. September 4-30, 1911-12. October November December . . . - - January. February.. March April.. May June July. August September... -- The year... 1912-13. October November. Discharge in second-feet. Run-off (total in Maxi- Mini- Mean. acre- mum. mum. feet). 23 14 21.0 1,120 23 18 20.8 1,280 21 21 21.0 1,250 27 21 24.8 1,520 24 22 22.3 1.370 19 12 15.1 869 890 12 114 7,010 300 38 70.2 4^ 180 41 18 17 6.8 25.7 12.2 1,580 726 8 8 5 5.0 2.5 2.5 6.55 4.55 2.82 403 280 168 890 2.5 28.4 20, 100 4 4 4.0 246 5 ^ 5.0 298 1912-13. December... January February March April.. May. June July August September... The year... 1913-14. October November December January 1-17 The period . Discharge in second-feet Max-i- Mini- mum, mum. 5 175 3,200 220 37 24 12 12 12 7 3,200 5 44 12 445 2 2 8 37 21 10 10 12 Run-off (total acre- feet). 4.2 22.6 281 88.3 30.7 17.6 10.5 12.0 8.7 4.85 7.88 5.71 45.8 258 1,390 15, 600 5,120 1,830 1,080 625 738 480 339 28,000 298 469 351 L,540 504 SURFACE V/ATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. MISCELLANEOUS MEASUREMENTS. Measurements of stream flow in the Ventura River basin at points other than those at which gaging stations have been maintained are recorded in the following table: Miscellaneous discharge measurements in Ventura River drainage basin for 1902-1914. Date. Stream. Tributary to- Locality. Dis- charge. Sept. 25,1902 SeT)t. 19, 1903 Ventura River "".[doi!*;!!!!'.!;;;!! do Pacific Ocean do do .....do Below diversion of Ventura City water system. Coyote Creek. Below upper diversion Sec.-ft. 5.23 3.7 Mar. 18,1914 Apr. 9, 1914 May 30,1914 Sept. 25, 1902 Do .... 600 feet above junction with Coyote Creek. do 280 167 .do do .do 69 Nortli Fork of Ven- tura River. Matilija Creek Ventura River do In flume .33 Above junction with North Fork.. do 2 Oct. 24,1906 do do .....do North Fork of Mati- lija Creek. Vio.,,. do do 7.7 Oct 23, 1911 300 feet above junction with North Fork. 200 feet above junction with North Fork. 500 feet above junction with Mati- lija Creek. 100 feet above mouth, below Shel- don flume. do do 9 Jan. 6, 1912 do 10 Oct. 24,1906 Oct 23 1911 do . . .do 2.2 20 Jan 6 1912 do do 3 4 Feb 2 1912 do ...do 2 1 Feb 21 1912 .do do .do .... . .. 2 Mar 23 1912 do do do 6 1 Apr. 23' 1912 May 14,1912 Tune 25 1912 do!!!!!!!!....]" do do..... 7.4 do .do .. 3 do . .do Near mouth above Sheldon flume. . do Near mouth, below Sheldon flume. Near mouth, above Sheldon flume, in S W.i NW.i sec. 28, T. 5 N., R. 23 W. do 2 1 Aug. 6,1912 Aug. 21,1912 Oct 8 1912 . do Ventura River do do 1 do ...do .2 1 1 Dec 2 1912 do .....do do do do do do do do do do do do 1 5 Jan. 6, 1913 do 2.5 Jan 30, 1913 do do do do do do do do do do 2 1 Mar. 8,1913 Apr. 29,1913 May 22,1913 June 25 1913 do do do ... 21 3.6 2 8 do 2 Aug. 14,1913 Oct 22, 1914 do 100 feet above mouth .8 1.1 Mar 17 19M do 42 Apr. 9, 1914 May 30,1914 Sept. 19, 1914 Apr. 9, 1914 Oct 24 1906 do do Nordhoff 22 do do Ojai Creek San Antonio Creek. . do do do Coyote Creek do do do do do do : do do do do do do do do do do do do do do do do 9.8 3.2 11 \h miles, below Nordhoff 4.4 Mar 18, 1914 69 Apr. 9,1914 May 30,1914 Mar 23 1912 do do do do do do do do do do do do do do do do do do do do do do 46 24 .8 Apr. 23,1912 May 15,1912 Aug. 6,1912 Aug. 20,1912 Oct 8 1912 . . do 7.3 do do • do 3 1 .5 do .4 Dec*. 2, 1912 Jan. 5,1913 Jan. 30,1913 Feb 28 1913 do do do do .5 1.4 1.3 52 Mar 7. 1913 do 16 Apr. 29,1913 May 22,1913 June 25,1913 Oct. 23,1913 Mar. 18,1914 Apr. 9, 1914 May 30,1914 do do 2.1 1.5 do do 1 do 32 do do 16 6.9 SANTA BAKBARA COUNTY. 505 Miscellaneous measurements of diversions in Ventura River drainage hasinfor 1902-1914. Date. Name. Diverts from— Locality, Dis- charge. Oct. 23,1911 Flume . North Fork Intake 1.3 Sept. 26, 1902 Sept. 19, 1903 Oct. 23,1911 Aug. 6, 1912 Aug. 21,1912 Power ditch do Near intake 1 5 do Sheldon flume do do North Fork of Mati- lija Creek. do Old mill 3.3 Intake, SW.iNW.isec.28, T.5N., R.23W. do 1.3 1 do do do 1.3 Oct. 8,1912 do do do 1.1 Dec. 2, 1912 Jan. 30,1913 do.. do do do do do do Ventura Light & Power Go's, canal. do do.... «'•' May 22,1913 June 25,1913 do do 1.4 do do do do do 1.8 Aug. 14,1913 Oct 22 1913 do 1 50 feet below intake 1 Sept. 19J.914 Sept. 19, 1903 do Upper diversion city supply L6 7 STREAM FLOW IN SANTA BARBARA COUNTY. CABPINTEBIA CHEEK BASIN. GOBERNADOR CREEK NEAR CARPINTERIA, CALIF. Location.— In SW. i SW. i sec. 14, T. 4 N., R. 25 W., 1,000 feet below junction of Eldorado and Steer creeks and 3^ miles northeast of Carpinteria, Santa Barbara County. Drainage area. — Not measured. Elevation. — About 800 feet above sea level. Records available. — June 24, 1916, to September 30, 1918 (not complete). Gage. — Vertical staff in two sections on left bank. A temporary gage at datum 1.11 feet lower was used June 24 to September 11, 1916. Discharge measurements. — Made from cable 150 feet below gage or by wading. Channel and control. — Small boulders and gravel; shifts. Banks high and not subject to overflow. Extremes of discharge. — 1916-1918: Maximum stage recorded, 3.5 feet Febru- ary 21, 1917 (discharge, 200 second-feet); minimum stage, 1.26 feet August 31, 1916 (discharge, 0.8 second-foot). Diversions. — None above. The Gobernador Water Co. diverts at their submerged dam 1 mile below station. Regulation. —None. Accuracy. — Stage-discharge relation not permanent. Rating curves fairly well defined. Gage read to hundredths occasionally. Daily discharge ascertained by applying gage height to rating table. Records good but only fragmentary. Cooperation. — Gage-height record and some discharge measurements furnished by K. C. Lillingston. 506 SUBFACE WATER OF PACIFIC SL.OPE, SOUTHERN CALIFORNIA. jDischarge measurements ofGohernador Creek near Carpinteria, Calif., for 1916-1918. Date. Made bv — height. Dis- charge. Date. Made by- Gage height. Dis- charge. 1916. June 24 F.C.Ebert Feet. 1.33 1.27 1.27 1.29 1.29 1.51 1.42 1.37 1.27 1.1 1.0 .9 .9 6.4 5.8 4.9 2.2 1917. Feb. 20 22 27 Mar. 6 June 28 Nov. 30 1918. Apr. 11 May 25 Aug. 1 K. C. LilliBgston do F.C.Ebert Feet. 2. 75 2.42 1.73 1..50 1.28 1.22 1.30 1.22 1.10 Sec.'jU Sept, 12 12 do-... K.C.Lillingston do F. C. Ebert 81 23 Nov. 29 29 K. C. LilliDgton F C Fbcit 9.1 1 4 Dec. 25 1917. Jan. 4 K. C. Lillingston K C. Lillingston F. C. Ebert do F. C. Ebert .8 6.5 6 do 3.1 Feb. 8 do .do 1.2 Daily discharg e, in second-feet, ofGohernador 7ree^ near Carpinteria, Calif. , for 1916-1918. Day. Tunc. July. Aug. Sept. Day. June. July. Aug. Supt. 1916. 1 1.1 1916. 16 . . 1.1 1.0 2 17 3 1 3 38. .. 1.1 1.0 4 1.1 19 1.0 5 20 1.3 1.0 6 21...... 1.1 1.1 22 1.5 1.1 8 1.3 1.1 1.1 1.3 23..... 9 24. 1.5 10 25... 11 1.0 .9 26 1.3 .9 1 12 1.4 27 .. 1.5 13 28::::::::::::::: 14 1.3 1.1 29... . . i.5 .9 15 30 1.3 31. .- ... 1.1 .8 ! Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June: July. Aug Sept. 1916-17. 1 14 "'I'.h' 3.1 2 5 3.6 1.0 ! 1.8 1.8 3.... 4 .9 ^ ..: 6 4.3 1.8 L8 S 10 9 2.5 6 4. 6 '""2.' 3" 2.0 i 1 7 4.3 8 1.0. 1.6 3.7 3.1 2.5 1.5 1.8 1.5 9 10 13 11 4.0 1.8 12 1 13 1 1.2! 1.6 1.8 14 2.5 1.8 1.8 15 1.8 1 1,5 16 11.2 1.3 6.5 2.0 1.1 17 18 , 1.5 1.8 19 ,.. 1.3 20 11.2 1.0 112 .. 1.6 21 ' 1.6 3.7 1 22 1.0 80 5.5 1.5 23 i 1.6 1.8 .. 1.5 24 1 19 5.5 1.5 25 6 3 1 1.5 26.. 1.8 27 1.2 23 18 ■"■4:9" 3.i 1.6 28 1.6 1.8 1.8 29 .9 .9 1.5 30 -.1.0 2,8 4.9 3.1 31 1.5 Note.— Maximum stage Jan. 3, 2.11 feet (discharge, 52 second-feet). SAUTA BABBARA COUKTY. 507 Daily in second-feet, of Gobernador Creek near Carpinteria, Calif., for 19 16-' i9i.4 ^.6 &.6 .6 6.7 6.7 6.7 6.7 6.7 6.7 6.7 6.9 6.9 6.9 6.9 1.0 1.0 1.0 1.0 1.0 .7 .5 1.0 1.0 1.0 1.0 1.0 6 1.0 62 6 20 6 10 66 44 4 2.4 2.4 1.4 1.4 1.4 36 24 24 22 22 21 20 17 15 15 16 24 24 1,780 930 455 310 210 152 126 102 102 114 114 109 102 82 6 80 6 78 76 53 53 210 102 66 13 12 6 11 10 10 7.5 7.0 7.0 7.0 44 17 10 8.2 8.2 8.2 8.2 7.6 7.0 6.5 6 6.2 6.0 6.0 6.0 5.5 4.5 4.5 4.5 3.9 3.6 3.0 3.0 4.5 4.5 3.9 3.6 3.0 .8 I. 2.6 .6 2.4 .6 6 2.2 .5 , 6 2.0 .5 6 1.8 .5 1.6 .4 1.3 .4 1.3 .4 1.0 6.4 b .9 .4 .9 .4 .8 .4 .9 .4 . 1.0 .3 1.0 .3 .9 .3 .8 .3 . .8 .3 . .8 .3 . 1.1 .3 >. .9 .3 . .9 .3 . .9 6.2 . .9 .2 . .9 .2 . 6.9 .2 . .9 23 . 1.0 4.0 . 1.0 3.4 . 1.0 2.5 a Gage not read; discharge interpolated. 6 Gage not read; discharge interpolated except for Jan. 14-16 and 18-20. Note.— Daily discharge determined as follows: Oct. 1, 1912, to Feb. 8, Feb. 9 to 24, Feb. 25 to Apr.27to May 15, June 5 to Aug. 27, and Aug. 28 to Sept. 13, from fairly well defined rating curves, to 26 and May 16 to June 4, by indirect method for shifting control: Jan. 14 to 16 and 18 to 20, which intervals a rise occurred, by comparison with records of Ventura River near Nordhofif. Apr. 7, Apr. 8 during SANTA BARBARA COUNTY. 523 Daily discharge, in second-feet, of Santa Ynez River near Santa Barbara, Calif., for 1904-1918— QonihmQd. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1913-14. 0.1 0.1 345* 45 8 4 2 8 78 9 5 5 4 4 4 4 4 4 4 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 11 17 11 14 8 7 6 6 53 47 31 22 19 16 16 15 15 14 13 12 11 11 10 10 60 322 165 2,850 770 590 450 390 370 680 8,500 3,030 2,360 1,660 1,120 630 550 490 431 375 340 324 279 261 330 330 217 204 188 176 176 157 155 139 2,360 1,060 8,350 4,750 1,600 1,600 1,160 1,020 915 780 690 650 610 570 530 490 450 412 375 357 340 340 302 285 271 250 243 227 222 207 195 190 178 173 166 160 155 157 151 200 178 157 147 135 127 126 131 120 116 114 111 111 104 98 96 94 93 88 87 84 81 78 87 93 84 84 81 78 76 76 73 71 71 76 67 64 62 57 57 55 55 53 52 50 50 50 50 48 48 47 46 44 42 41 40 41 42 42 39 38 37 36 36 34 33 33 33 32 31 32 32 31 28 26 26 24 23 22 22 22 22 22 21 20 20 20 19 18 17 17 15 14 14 14 13 13 12 12 12 11 11 11 11 11 11 11 11 11 10 10 10 8.5 9 8 7.5 7.5 7.5 6.5 6 6 5.5 6 6 6 5 5 5 5 5 5 5 4 4 4 4 4 3.5 4.5 3.5 3.5 3 3 3 2.5 3 2.5 2.5 • 2.5 2.5 2.5 2.5 2 2 2 2 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2.5 9 2 10 2 11 2 12 2 13 2.5 14 2 15 2 16 2 17 2 18 2 19 2 20 2 21 2 22 2 23 2 24 2 25 2 26 2 27 2 28 2 29 2 30 2 31 .... Note. — Discharge determined from two fairly well defined rating curves. Day. Oct. Nov. , Dec. Jan. Feb. Mar. Day. Oct. Nov. Dec. Jan. Feb. Mar. . 191^15. 1 2 2 2 2 2 2 2 2 2.5 2 2 2 2 2 3 3 3 3 3 3 3 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 15 9.5 7.5 9 9 9.5 9 8 8.5 14 28 35 31 16 14 13 13 13 13 13 12 12 12 16 14 14 13 13 12 12 190 1,560 520 325 171 129 114 113 2,360 1,130 900 710 570 455 370 309 282 283 262 287 229 210 218 203 185 183 178 164 159 152 1914-15. 16 2 2 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 3 3 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 4 3 2.5 12 46 28 28 26 24 19 18 16 16 16 15 14 14 13 13 12 12 12 10 11 10 11 10 10 12 13 13 36 1,020 395 207 320 570 428 356 341 350 294 276 360 373 325 309 30i 145 2 17 130 3 18 123 4 19 120 5 20 117 6 21 117 7 22 112 8 23 106 9 24 104 10 25 102 11 26 100 12 27... 97 13 28 190 14 29 '.. 187 15 30 133 31 117 524 SUEFACE WATEE OF PACIFIC SLOPE, SOUTHEEN CALIFOENIA. Daily discharge, in second-feet, of Santa Ynez River near Santa Barbara, Calif., for 1904-1918— Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1915-16. 1 380 350 325 325 325 340 22 22 21 20 18 17 16 15 14 12 11 11 10 10 9.9 9.9 9.9 9.3 8.8 8.3 7.8 7.8 7.8 7.8 7.4 7.0 6.6 6.6 6.6 6.2 15 15 15 15 15 14 13 12 11 11 10 10 1 7 6 5 4.0 3.7 3.7 3.7 3.7 3.4 3.1 2.8 2.6 2.4 2.2 2.0 6.2 6.2 6.2 6.2 5.8 5.8 4.2 4.2 3.9 2.4 2.4 2.3 2.3 2.1 2.1 2.1 2.1 2.1 2.0 2.0 1.9 1.9 1.8 1.8 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.9 1.9 1.8 1.8 1.8 1.7 1.7 1.7 1.6 1.6 1.6 1.5 1.5 1.5 1.4 1.3 1.2 1.1 !9 1.1 1.0 1.0 1.0 1.0 .9 .9 1.0 1.0 1.0 .8 1.7 1.8 1.4 1.4 1.5 1.5 1.4 1.1 1.3 1.3 1.2 .9 .8 .7 .9 1.5 1.6 1.6 1.6 1.6 .4 .8 .2 1.0 1.5 .7 .6 .4 .2 .1 .1 .9 .8 .8 .7 .7 .7 .6 .5 .5 .5 .5 .5 .5 .6 .5 .^ .5 .5 .5 .5 .6 .5 .5 .5 .5 .5 .5 .5 .4 .4 .4 0.6 2 .9 3 310 300 .1 4 j GOO .1 .3 6 240 255 .05 7 .1 8 49 .3 9::: :::::;:::::;: 295 200 .00 10.. ■ - ' 1 .05 11 I 2S5 187 .2 12 1 1 .1 13 ' 1 i 176 176 1G4 .05 H i . ' 230 1 .2 15 ' ! 1 .00 i i ! 16 1 205 .00 17 ' 153 21 22 29 28 28 26 26 26 26 26 24 24 24 24 22 32 32 32 32 29 27 27 27 27 27 27 26 24 23 20 18 18 21 21 21 21 18 21 23 23 24 20 21 18 17 16 .05 18 2,7S0 195 .00 19 .2 20 .05 21 195 176 153 215 183 .05 22. .00 23 410 395 395 1,280 2,940 1,120 1,070 665 520 147 122 215 173 126 107 93 76 74 71 71 95 215 96 83 77 62 77 194 198 149 128 110 99 92 86 86 80 74 CS .1 24 49 155 .00 25 .00 26 45 .05 27 130 .5 28 10 .1 29 325 116 .1 30 31 10 15 60 30 26 15 10 10 10 10 10 9 9 9 9 9 9 9 9 9 9 9 30 2, 500 375 150 104 93 100 76 73 1.9 31 65 62 62 57 53 49 45 43 43 43 43 43 43 41 41 38 38 38 45 486 981 1,720 524 472 1,730 712 486 398 110 329 278 240 225 200 186 173 160 164 147 134 126 118 114 107 100 93 93 93 93 90 87 84 81 78 75 72 70 70 67 67 64 62 59 56 56 56 50 50 50 48 45 45 43 43 45 50 45 45 45 45 41 41 38 38 38 36 38 38 36 34 1916-17. 1. 5 18 12 5 6 5 5 10 25 14 10 6 6 5 4 4 4 4 4 4 4 3 3 3 3 3 3 ■"7." 5" .4 2 .4 3 .3 4 .3 5 .3 6 7 8 9 10 11 .3 .3 .3 .3 .3 .3 12 .3 13 14 .3 .3 15 .2 16 .2 17 .2 18 .2 19.... 20... .2 .2 21 .2 22 23 .2 24 .2 25 .2 26 .2 27 .2 28 .2 29 .2 30 2 31 Note.— Water-stage recorder not in operation Doc. 25-26 and Mar. 21-27; discharge intei-polated. SANTA BARBAEA COUNTY. 525 Daily discharge, in second-fret, cf Santa 1904-1918- Ynez River near Santa Barbara, Calif., for —Continued. Day. Oct.. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 191S. 1 17 17 18 16 16 19 23 18 16 14 15 15 15 15 15 30 70 70 8S0 4,810 2,750 645 455 575 425 325 257 201 190 173 166 187 455 2, 750 1,300 880 1,900 2,010 2,010 1,300 720 515 455 395 720 4,280 1,790 1,120 880 720 645 575 515 485 425 395 335 325 310 295 277 257 234 223 208 194 190 184 173 166 162 156 145 135 132 129 122 119 116 107 101 98 95 95 95 95 92 86 80 74 72 72 66 72 69 72 66 66 64 61 58 53 50 53 50 50 50 48 45 45 45 45 45 45 45 45 50 45 45 36 33 30 29 28 27 26 25 24 24 22 21 19 18 17 16 21 20 20 19 18 18 15 16 14 13 14 13 12 12 12 11 11 11 10 9 8 6.5 5.5 5.5 5 4.3 4.3 4.3 4.3 4.0 4.0 4.0 3.9 3.9 3.8 3.5 3.6 3.8 3.7 3.6 3.5 3.2 2.9 3.5 3.0 2.8 2.5 2.5 2.5 2.5 2.4 2.3 2.5 2.8 3.0 3.0 2.9 2.9 4.3 3.5 3.5 3.5 3.4 3.3 3.6 3.9 3.6 3.2 2.9 2.8 2.6 2.4 2.3 2.4 2.6 2 2..8 3 3.0 4 '' "' "■ ' 1 1 3.1 5 1 1 2.7 (■> i 2.3 1 ! 2.6 1 1 2.8 9 ' ... 1 .. , . 3.0 10 ' 1 3.2 11 ' i . 3.4 12 3.2 13 ' ..' 3.0 14 i 1 3.2 15 . 3.4 le 3.4 17 3.4 18 3.5 19 . 1.0 .9 1.0 1.0 1.2 1.2 2.4 3.0 2.0 1.7 1.8 1.8 1.8 3.4 20 3.2 21 3.2 22 3.3 23 3.3 24 3.2 2.5 3.0 26 .. . 3.0 27 38 28 20 29^ 1 13 30 i 8 31.. 1 1 Monthly discharge of Santa Ynez River above Mono Creelc, near Santa Barbara, Calif., for 1903. [Drainage area, 71 square miles.] ■ Discharge in second-feet. Month. Maximum. Mim'mum. Mean. Run-off (total in acre-feet). 457 25 111 535 31 9 2 8 8 29 9 3 19 14 20 84 17 6 1,168 February 778 March April May June 1-20 1,230 4,998 1,045 238 The period . . <') 460 526 SUKFACE WATER OF PACIFIC SLOPE, SOUTHERI^ CALIFORNIA. Monthly discharge of Santa Ynez River near Santa Barbara, Calif ., for 1904-1918. Discharge in second-feet. Maxi- mum. Mini- mum. Run-off (total acre- feet). Discharge in second-feet. Maxi- mum. Mini- mum. 1904. January, 7-31 . February March April May Jime July August September The period. 1904-5. October November December January February March April May.. Jime July August September The year... 1905-8. October November December January February March April May June — July August September — The year... 1906-7. October November... December... January February — March April 6.4 132 446 121 18.5 5.0 .1 .0 17.1 7.4 13 635 6,550 7,275 242 1 5 4 104 171 4,810 430 635 49 12 2.5 1 2.1 600 ,450 920 ,150 670 The period 1907-8. October November — December — January 315 4 The period 1911-12. October November December January February March April May , June July August September.. The year.. 6.0 2.6 .1 0.9 12 30.6 .7 .034 .0 1, 137 424 42 2 11,425 112 79 37 5 3 2 6.4 7.0 73.9 905 797 143 51.2 15.9 3.8 2.6 1.4 541 381 430 4,544 50, 260 49,010 8,509 3,14a 946 234 160 163 65 28 12 2.5 1.0 1 1.0 2.1 4.0 14.9 27.4 1,050 158 67.4 23.9 5.8 1.4 61 125 246 916 1,520 64,600 9,400 4,140 1,420 357 86 60 82,900 142 104 1.4 52.2 1,470 490 1,520 237 61 83 3,210 90,400 27, 200 93,500 14, 100 229, 000 14.4 2.7 56 267 161 344 16,400 17.800 12 18 19 15 16 4.4 1.0 .4 12 13 10 10 31 16 5.0 1.0 .4 .2 5.8 10.4 13.2 14.9 11.9 117 65.7 27.5 9.30 2.61 .65 .31 357 619 812 916 684 7,190 3,910 1,690 553 160 40.0 18.4 1912-13. October November. . December January February March.. April May Jtme July August September... The year . . 1913-14. October November. . . December... January February March April ,780 210 32 18 44 3.0 23 1.0 0.2 .4 .6 .5 1.4 30 19 7.8 3.0 .8 .2 .1 0.33 .55 .80 8.18 157 77.4 26.1 12.5 7.55 1.24 1.39 .26 June July August September The year . . . 1914-15. October November December January February March .1 345 53 ,500 8,350 650 147 76 34 14 5.0 2.5 10 139 151 71 36 14 5.5 2.0 2.0 .10 18.0 7.9 797 1,030 296 98.1 49.5 24.1 9.52 3.47 2.03 !.500 190 46 1,020 2,360 309 2.5 7.5 113 97 17.5 64.2 508 The period. 1915-16. June July August September The period. 1916-17. October November. . December.. January February. . . March April May June July August September.. 22 6.2 1.8 1.9 6.2 1.6 .1 .00 11.6 2.9 25 2,500 215 1,730 329 64 32 62 38 67 34 16 2.0 .8 .4 6.5 6.0 123 110 300 129 46.0 23.6 7.94 1.33 .55 .25 23.4 16,900 The year... 1917-18. January February March April May June July August September The period. 2,500 3.0 4,810 4,280 310 80 36 12 4.3 38 0.9 1.4 45 12 2.9 2.3 2.3 1.60 395 930 160 56.3 20.7 5.58 2.98 5.31 SANTA BARBARA COUlsTTY. 527 SANTA YNEZ RIVER NEAR LOMPOC, CALIF. Location. — Near east boundary of La Mision Vieja de la Purisima grant, at highway bridge, about 1| miles east of Lompoc, Santa Barbara County. Drainage area. — 725 square miles (measured on topographic maps). Elevation.— About 100 feet above sea level. Eecords available. — November 10, 1906, to January 9, 1907, and September 25, 1907, to September 30, 1918. (Discharge not computed for 1909.) Gage. — Vertical staff fastened to pier at right end of center span of bridge near down- stream end. Datum lowered 1.00 foot June 27, 1907. Discharged measurements. — Made from bridge at gage or by wading. Channel and control. — Bed composed of sand; shifting. Banks high and not subject to overflow. Extremes of discharge. — 1906-1918: Maximum stage recorded, 13.0 feet January 25, 1914 (discharge, 41,800 second-feet); minimum discharge, 5 second-feet October 13 to 21, 1913. Diversions. — Except for a small quantity diverted by the city of Santa Barbara at Gibraltar dam, water is not diverted above the station, but some water is pumped for irrigation from wells aloilg the banks of the river. Regulation. — None. - Accuracy. — Stage-discharge relation not permanent. Rating curves usually fairly well defined for low and medium stages. Gage read to half-tenths, sometimes to hun- dredths, once a day, more frequently during floods. Daily discharge ascertained by applying mean daily gage height to rating tables, by shifting-control method, or interpolating between discharge measurements. Records fair for periods when frequent discharge measurements were obtained ; poor for other periods. Discharge measurements of Santa Ynez River near Lompoc, Calif., for 1906-1918. 1906. Nov. 10 Dec. 12 1907. Sept. 24 Jan. 28 29 Mar. 10 191&: Jan. 30 Mar. 5 Apr. 15 Mav 4 27 June 9 9 Aug. 4 Sept. 14 1911. Feb. 27 Mar. 2 22 Apr. 11 Made by- R. S. Hawley.. L.M.Hyde... Clapp and Hyde . L.M.Hyde... do W. F. Martin. McDonald and Hyde do ....do do do do do do McDonald and Dyer. . . Donald McDonald and H.M. McDonald.... W.B. Clapp.. J. E. Stewart.. D. McDonald. do do J. E. Stewart.. do D. McDonald. C.C.Jacob.... W.V.Hardy Donald McDonald . do do Gage height. Feet. 5.02 5.88 4.80 3.85 3.28 4.25 4.15 3.85 4.35 6.65 6.9 8.15 8.5 6.25 5.95 4.10 3.84 4.00 4.85 6.50 2.80 2.90 Dis- charge. Sec-ft. 1,490 418 2,290 1,850 1,150 2,560 11, 100 10,800 15, 700 18, 500 8,040 6,640 309 112 135 1,870 765 1911. May 10 June 7 July 11 Aug. 19 Sept. 8 8 Oct. 11 Nov. 13 Dec. 7 1912. Jan. 18 Feb. 10 25 25 Mar. 6 Apr. 13 May 16 June 7 10 July 11 Aug. 10 Sept. 9 Oct. 7 Nov. 11 Dec. 6 1913. Jan. 8 Feb. 13 25 Mar. 13 Apr. 11 May 10 June 5 5 July 14 Aug. 11 Sept, Made by- Donald McDonald do do do do F.C.Ebert Donald McDori„id do do Donald McDonald . do do F.C.Ebert... Donald McDonald . do do F.C.Ebert... Don-^ld McDonald . do do ....do do do ....do Donald McDonald ..do ..do ..do ..do ..do R.C.Rice.... Donald McDonald ....do ....do ....do Dis- height. charge. Feet. 3.00 3.00 2.90 2.75 2.70 2.70 2.70 2.72 2.77 2.72 2.79 2.79 3.26 3.30 2.87 2.86 2.86 2.79 2.80 2.79 2.80 2.83 2.80 2.82 3.00 4.60 2.98 2.67 2.58 2.60 2.60 2.51 2.50 2.49 Sec.-ft. 389 243 127 55 47 48 37 45 67 61 55 42 43 199 407 89 54 44 27 21 21 21 24 6 24 6 25 17 11 10 a Measurement not reliable owing to poor measuring conditions. 6 Includes three-fourths second-foot estimated flow in secondary charmels. 528 SURFACE WATER OF PACIFIC SLOPE, SOUTHEEiq^ CALIFORNIA. Discharge measurements of 8 anta Ynez River near Lompoc, Calif ., for 19G6-19 IS— Contd, Date. Made by — Gage hoight. Dis- charge. Date. ]\Tade by- Gage lieight. Feet. Dis- charge. 1913. Feet. Scc.-ft. 1915. Scc.-ft. Nov. 12 Donald McDonald 2.61 26 June 7 Donald McDonald 0.7S 164 20 do 2.96 194 12 do .78 143 Dec. 8 do 2.eo 25 11 do .75 126 15 do 2.60 29 21 do .70 129 29 .....do .72 85 1914. July 5 do .'70 96 Jan. 6 Donald McDonald 2.79 79 10 do .70 77 13 do 2.60 54 12 do.. .68 85 15 do,.... 3.30 352 Aug. 2 do .02 57 21 do 2.25 1,230 7 do .60 44 27 do 3.25 7,920 9 do .60 46 30 do 2.05 2,540 16 do .60 46 Feb. 2 do..... 1.40 1,400 23 do .60 47 9 E,. F. Cowles 1.25 651 Sept. 6 do .60 31 19 do : 3.20 10,900 11 do .60 38 22 Donald McDonald.. 2.10 7,530 13 do .60 37 2S R. F. Cowles .70 2,280 Oct. 4 do .60 35 Mar. 9 Donald McDonald.. .50 1,010 7 do .60 34 11 do .50 861 16 do .60 35 16 do.... .50 821 Nov. 8 .....do .60 38 23 do.... .40 644 Dec. 6 do .70 129 31 do.... .50 666 Apr. 6 do.... .50 484 1916. 11 do.... .40 367 Jan. 4 Donald McDonald 1.95 2,780 13 do.... .40 368 21 do 1.10 1,490 20 do.... .30 268 Feb. 7 do 1.00 945 May 11 do.... .06 168 22 do 1.05 460 16 do.... .10 152 Mar. 6 do 1.20 754 18 R. F. CoAvl Donald Mc ;s .13 .04 154 144 21 Apr. 10 do do 1.00 .80 456 25 Donald.. 246 28 do .10 124 24 do .70 185 28 F. C. Ebert .10 119 May 8 do .60 158 June 1 Donald McDonald. . .11 126 22 do .50 93 13 do .04 108 June 6 do .50 74 July 17 do.... - .08 53 19 do .55 49 Aug. 8 do.... — .22 34 July 10 do .50 35 Sept. 12 do...- - .25 34 24 do .45 32 Oct. 5 do.... — .25 25 Aug. 7 do .45 30 10 do.... - .25 26 24 do .40 33 12 do.... — .25 21 Sept. 4 do .40 26 19 do.... - .25 29 18 do .40 25 26 do.... - .28 27 Oct. 9 do .45 37 Nov. 7 do.... — .25 31 23 do .40 56 9 do.... - .25 33 Nov. 6 do .45 38 16 do.... — .22 32 21 do .45 40 23 do.... — .22 30 Dec. 4 do .50 60 30 do.... — .22 28 18 do .45 46 Dec. 7 do.... — .10 49 12 do .00 83 1917. 14 do.... .00 83 Jan. 8 Donald McDonald 1.00 329 21 do.... .05 111 22 do 1.10 387 28 do.... — .10 85 Feb. 5 do 192 22 do 3! 10 5, 140 1915. Mar. 5 do 1.10 603 Jan. 4 Donald McDonald - .05 75 20 do .95 321 11 do — .10 73 Apr. 9 do .75 195 16 do — .10 71 23 do -.. .75 169 18 do — .10 77 30 F.C. Ebert .65 108 20 do — .12 64 May 7 Donald McDonald .65 116 20 F.C. Ebert — .12 70 21 do .60 83 25 Donald McDonald.. - .10 76 June 4 do .60 71 Feb. 1 do .75 828 22 do .60 37 6 do.... .70 837 26 F.C. Ebert 1.61 27 9 do.... 4.85 37,900 July 9 Donald McDonald 1.62 25 15 do.... 1.05 1,590 Aug. 20 do 1.50 22 22 do.... .85 1,280 Sept. 10 do 1.56 19 Mar. 6 do.... 1.10 845 Oct. 8 do i.56 18 8 do 1 10 8.50 Nov. 24 Dennis Daly 1.48 26 15 do.... 1.10 510 Dec." 16 do 1..50 22 29 do.... 1.10 522 Apr. 5 do.... .85 310 1918. 12 do.... .85 305 Jan. 1 Dennis Daly 1.50 24 17 do.... .86 267 10 F.C. Ebert 1.50 22 19 do.... .90 256 Feb. 3 Dennis Daly 1.50 25 26 do.... .82 264 24 do 2.60 3,160 May 3 do.... .95 367 Mar. 24 do 1.80 1,&50 G do.... 1.30 860 31 do 1.70 835 11 do.... 1.10 433 Apr. 8 do 1.60 554 18 do.... 1.00 304 14 do 1.60 383 21 do.... .90 245 15 do 1.60 392 June 3 do.... .80 144 May 19 do 1.05 186 3 Ewald Pyz eL!;:!::: .80 156 21 F.C. Ebert 1.03 157 SANTA BARBARA COUNTY. - 529 Discharge measurements of Santa Ynez River near Lompoc, Calif ., for 1906--191S—Contd. ' Made by- Gage leight. Dis- cbarge. Made by- Cage f)is- height. charge. 1918. June 3 9 16 23 30 July 7 14 28 30 Dennis Daly do .....do..... do do do do do F. C. Ebert Feet. 1.09 1.02 .92 .88 .88 .94 Sec.-ft. i 129 1 104 88 1918. Aug. ■ Sept. 1 Dennis Daly do.. do-. do.. do.. do.. do.. do-. do.. Feet. 0.76 Sec.-ft. 36 33 Daily discharge, in second-feet , of Santa Ynez River near Lompoc, Calif., for 1906-1908 and 1910-1918. Day. Nov. Dec. Jan. Sept. Day. Nov. Dec. Jan. Sept. 1906-7. 23 23 23 23 23 23 23 23 23 23 64 450 450 247 164 380 295 247 224 295 320 1,330 1906-7. 16 8 8 8 8 8 8 8 8 8 16 23 23 23 23 114 101 2 : 17 3 18 - 76 76 ■ - ■ 4 19 5 .: 20 21 22 23 24 25 26 27 28 29 30 31 76 i 6 64 ; 7 64 64 64 64 76 146 1,090 640 495 415 1 " ' 8 ..... » i0 .. 8 8 8 I 8 . 30 11 30 12 30 13 30 14 30 15. - . 30 1 1 Day. Oct. Nov. Dec. Jan. Feb. 30 197 67 67 950 30 155 67 67 1,390 30 122 67 67 4,630 30 122 07 67 3,860 30 122 67 67 1,890 30 90 90 67 1,680 30 90 122 67 1,300 30 90 122 67 1,300 30 90 122 67 3,200 30 90 90 67 3, 200 30 SO 90 67 2,100 30 90 67 67 1,890 30 90 67 67 1,680 30 90 67 155 1,480 30 90 67 155 1,300 30 90 90 155 1,120 30 90 90 155 790 30 90 90 122 870 30 90 67 122 870 30 67 67 122 870 30 07 67 122 950 44 67 67 90 1,210 155 67 67 90 1,120 155 67 67 155 950 197 67 67 2,210 95a 555 67 67 3,420 950 415 67 67 5,070 1,035 555 67 67 4,520 1,035 350 67 67 1,390 1,210 295 67 67 1,300 197 67 1,035 Apr. May. Sept. 1907-8. 1 2... 3 4 5 7 8 9 10 11 12 13 U.......... 15 16 17 18 19 20 21 '22 23 24 25 26 27 28 29 30 31 1,120 1,035 1,035 950 950 870 870 870 790 630 480 415 480 480 480 480 555 630 630 555 480 480 480 480 415 350 350 350 350 240 240 240 240 197 197 197 197 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 240 197 197 197 197 155 155 155 122 90 90 90 90 90 90 90 90 18 18 IS 18 18 18 18 30 122 30 18 142131°— 21— wsp 447 -34 530 SURrA€E WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Dailij discharge, in second-feet, of Santa Ynez River near Lompoc, Calif., for 1906-1908 and 1910-1918 — Continued. Day. Oct. Nov. Dec. Day. Oct. Nov. Dec. Day. Oct. Nov. Dec. 1908. 1 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 44 18 90 90 67 44 44 197 11 12 13 14 IS le ij 1£ 2C 1908. 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 44 67 30 30 18 18 18 18 44 30 1908. 21 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 3") 2 22 31 3 23 30 4 24 .... 3) 5 25 18 6 .... 26 IS 27 is J.. 28 18 9 29 18 10 30 18 31 18 Day. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1910. 1..., 11,100 1,580 1,200 750 020 620 225 225 225 225 150 150 150 90 90 90 90 120 120 90 90 90 90 90 90 150 120 90 90 150 150 150 150 740 480 375 275 270 615 1,260 ■ 785 640 fi25 550 385 380 275 275 275 275 275 197 197 197 197 197 197 138 138 138 138 138 138 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 58 58 58 38 58 58 58 58 58 58 58 57 56 54 53 52 51 49 48 47 46 44 43 42 42 42 42 42 42 42 42 36 36 36 36 36 36 30 30 30 30 30 30 30 30 30 30 30 30 30 30 26 26 26 26 26 26 26 26 22 22 22 22 22 22 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 22 22 22 22 22 22 22 22 22 2..:.. 22 3 22 4 22 5 22 6..... 22 7 620 1 150 22 8 500 500 400 310 310 225 225 500 620 1,040 750 620 500 500 400 400 400 400 400 400 310 310 310 225 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 22 9..... 22 10 22 11. . 22 12 22 13 22 14 22 15 30 IC 30 17 30 18 28 10 26 20 22 21 22 22 22 23 22 24 22 25 22 26 22 ! 22 22 j 22 20 1 22 20 1 22 20 i 22 20 22 22 27 22 28 22 29 22 30 22 31 Note.— Daily discharge determined from rating curves applicable as follows: Jan. 1 to Mar. 21, 1910, poorly defined and only approximate above 400 second-feet; Mar. 22 to Apr. 3, 1910, indirect method for shifting control. Apr. 4 to May 27, 1910, poorly defined; May 28 to June 8, 1910, interpolated; June 9, 1910, to Jan. 29, 1911, poorly defined; Jan. 30 to Mar. 9, 1911, poorly defined; Mar. 10 to June 6, 1911, indi- rect method for shifting control; June 7 to Aug. 16, 1911, poorly defined: Aug. 17, 1911, to June 30, 1912, indirect method for shifting control and rating tables covering short periods of time. SAISTTA BARBARA COUNTY. 531 Daily 'discharge, in second-feet, of Santa Ynez River near Lompoc, Calif., for 1906-1908 and 1910-1918 — Continued. Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. 1910-11. 1 22 22 22 22 22 22 22 22 22 22 22 22 26 26 26 26 22 22 22 22 22 22 22 22 22 22 22 26 26 26 26 40 40 40 39 39 39 38 38 38 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 22 22 22 26 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 37 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 42 36 36 36 30 30 30 30 30 30 30 30 37 37 37 37 37 37 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 67 30 30 30 30 30 30 30 30 30 64 335 260 260 260 335 430 195 97 64 64 64 64 42 42 430 810 430 670 17,300 3,210 7,030 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 45 45 45 45 45 45 45 45 45 2,070 790 230 4,930 2,610 1,830 970 620 620 620 1,380 1,170 790 1,170 790 620 470 470 470 620 620 620 620 620 620 470 470 790 45 45 45 45 45 t 45 45 45 45 45 45 45 45 45 45 40 35 32 30 28 25 22 45 45 45 45 45 4,750 5,290 2,070 6,430 7,030 7,030 19,000 16, 100 20,400 15,000 9,000 6,000 3,800 3,300 3,200 2,500 2,000 1,900 2,100 2,000 1,900 1,870 1,600 1,900 1,630 1,370 1,500 1,270 1,210 1,150 1,270 45 45 45 95 95 280 350 50 55 185 110 670 560 340 170 185 205 205 205 205 205 205 205 205 205 205 205 205 205 205 125 1,400 1,340 1,270 1,210 1,150 1,090 1,020 960 900 830 765 745 725 700 680 660 820 800 770 750 730 710 690 660 640 800 600 580 550 530 125 125 126 125 125 125 125 70 70 70 125 540 410 300 205 205 205 205 205 205 205 125 125 125 125 125 125 70 70 70 520 500 590 470 460 440 430 420 400 389 384 379 373 388 363 358 353 347 342 337 332 327 321 316 311 305 300 295 290 284 279 75 75 80 80 85 85 o90 a 90 o90 95 95 100 100 100 100 100 100 100 95 95 90 90 85 85 150 150 140 140 135 135 135 274 269 264 258 253 248 243 243 243 243 243 243 243 243 243 243 243 243 243 127 127 127 127* 12? 127 127 127 127 127 127 70 70 70 70 70 70 70 70 70 70 70 70 70 70 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 127 97 97 97 97 97 97 97 97 97 97 97 97 97 29 29 29 29 29 28 28 28 28 28 27 27 27 27 27 27 26 26 26 26 26 25 25 25 25 25 24 24 24 24 24 97 97 97 96 97 97 97 97 97 97 97 97 67 67 67 67 55 55 55 56 56 57 40 40 41 41 42 42 43 44 44 23 23 23 23 23 22 22 22 22 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 45 2 45 3 46 4 46 5 47 6 47 48 8 48 9 48 10 47 11 47 12 47 13 46 14 46 15 46 16 45 17 45 18 45 19 ,.... 44 20 44 21 44 22 43 23 *43 24 43 25 42 26 42 27 42 28 41 29 41 30 41 31 1911-12. 1 21 2 21 3 21 4 21 5 21 6 21 7 21 8 21 9 21 10 21 11 21 12 21 13 21 14 21 15 21 16 21 17 21 18 21 19 21 20 21 21 21 22 -. . 21 23 21 24 21 25 21 26 21 27 21 28 21 29 21 30 21 31. a Gage not read; discharge interpolated. Note.— Daily discharge determined by indirect method for shifting control and rating tables covering short periods of time. Discharge Oct. 1 to 10, 1911, interpolated. 532 SURE ACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Santa Ynez River near Lompoc, Calif., for 1966-1908 and 1910-1918— Continued, Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June. July. Aug. Sept. 1912-13. 1 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 22 22 22 22 . 22 22 22 22 22 23 23 23 23 23 23 23 23 23 21 21 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 26 26 26- 27 27 27 28 28 28 28 29 29 29 30 30 30 31 31 31 32 32 32 32 33 33 33 33 34 34 34 34 34 34 34 34 34 125 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 37 35 33 31 29 27 25 70 125 185 100 90 80 80 80 80 75 75 75 75 70 70 70 125 4,470 2,600 900 500 350 350 350 240 240 240 240 150 150 150 150 150 150 147 144 141 138 135 132 129 126 123 120 117 114 111 108 105 102 99 90 93 90 87 84 81 78 75 72 69 66 63 62 61 60 60 59 58 57 56 56 55 54 53 52 52 51 50 49 48 48 47 46 45 44 44 43 42 4l 40 40 40 39 38 38 37 36 36 35 34 34 33 32 32 31 30 30 29 28 28 27 26 26 25 25 24 24 24 24 24 24 24 24 24 24 24. 24 24 24 24 24 24 24 24 24 24 24 24 24 17 17 17 11 24 24 24 11 2..... 3 4 5 6 jj 7 . 8... 9 10 11 12 13 ... 14 15 16 17 IS. . 19 20....: 21 22 23 2f 25 26 27 28 29 30 31 Note.— , niiy discharge determined by indirect method for shifting control, interpolation between measurements, and rating curves covering short periods. Observer's measurement Feb. 25 taken as mean (iischar[e for day. ... 9.. 10.. 11-. 12.. 13.. 22.. 23.. 24.. 25.. 27.. 28.. 29.. 30.. 31.. 314 143 142 110 81 79 75 54 54 275 600 2,200 30, 800 4,250 2,200 1,230 725 500 2,800 22, 200 22,000 7,920 4, 650 3,750 2, .540 2,000 1,600 1,400 1,200 1,600 1,600 1,200 1,200 900 651 600 600 350 350 200 200 200 6,650 10,900 24,800 25, 500 7, .530 6,050 4,050 2,750 2,350 2,000 2,500 1,700 1,650 1,350 1,300 1,220 1,150 1,080 1,010 980 861 841 821 795 770 745 720 695 670 644 646 649 652 655 658 661 664 666 635 605 575 545 515 484 460 437 414 391 367 368 368 353 325 311 297 283 268 264 260 256 252 247 242 237 232 227 222 217 212 207 202 197 192 187 182 177 172 101 158 155 1.52 153 152 150 149 148 147 146 145 144 136 129 122 123 124 125 126 125 123 122 120 119 117 111 110 108 37 34 37 34 36 34 36 34 35 34 35 34 34 31 34 34 34 34 34 34 34 34 34 34 34 34 34 34 34 33 34 33 34 33 34 32 34 32 34 32 34 32 34 31 34 31 34 31 34 30 34 30 34 33 34 29 34 29 34 29 34 Note.— High-water discharge October to January read from curves or computed by shifting-control method; discharge Mar. 9 to Sept. 30 interpolated between measurements, except for slight rise Mar, 29-30, as the stage was falling gradually. SANTA BARBARA COXJiTTY. 533 Daily discharge, in second-feet, of Santa Ynez River near Lompoc, Calif., for 1906-1&0S and 1910-1918 — Continued. Day. Oct. Nov. Den. Jan. Feb. Mar. Apr. Mny. June. July. Aug. Sept. 1914-15. 1 29 28 27 26 25 25 25 26 26 26 25 24 24 25 26 27 28 29 29 29 29 28 28 27 27 27 27 27 28 28 28 29 29 29 30 30 30 31 32 33 33 33 33 32 32 32 32 32 32 31 31 30 30 30 30 30 29 29 28 28 28 85 70 50 50 70 50 49 55 62 69 76 83 83 83 85 85 270 110 165 135 111 90 80 85 70 55 80 85 84 82 81 80 78 77 75 75 75 74 74 73 73 73 73 72 72 71 71 74 77 72 67 68 70 72 74 76 76 76 160 1,760 5,300 1,480 1,080 6,100 4,880 2,170 1,080 837 837 2,950 32,500 20,200 15,500 9,200 5,700 3,100 1,590 1,500 2,100 2,350 2,000 2,250 1,900 1,280 1,500 3,450 2,200 1,700 1,600 1,300 1,550 1,650 1,350 1,050 950 845 848 850 800 1,050 850 800 600 550 510 510 510 460 460 460 460 460 410 410 410 410 410 410 522 460 365 365 365 335 335 310 310 310 335 305 305 305 305 298 290 282 274 267 262 256 260 265 250 260 290 275 264 265 265 265 320 325 400 367 460 1,720 860 830 620 530 510 433 425 415 365 325 315 310 304 295 285 275 265 255 245 235 225 215 205 195 185 175 165 155 150 153 157 160 164 160 156 152 148 143 135 126 126 127 127 128 128 129 129 124 118 113 107 102 96 91 85 86 88 90 92 94 96 92 88 84 80 77 81 85 84 83 81 80 79 77 76 75 73 72 71 69 68 67 65 64 63 61 60 59 57 55 52 49 46 44 45 46 46 46 46 46 46 46 46 46 46 46 47 47 47 47 45 44 43 42 41 40 39 38 37 2 36 3.. . 35 4 34 5 33 6 31 7 . 32 8 34 9 10 37 11 : 38 12 38 13 . 37 14 ; 37 37 16 . 37 17 , 37 18 36 19 . 36 20 36 21 . 36 22 36 23 35 24 . . 36 25 35 26 35 27 35 28 35 29 35 30 . • 35 31 Note. — Discharge interpolated between measurements Oct. 1 to Nov. 31; Dec. 7-14; Dec. 28 to Jan. 27; and May 18 to Sept. 30. Remainder of record obtained by shifting-control method, and from rating curves covering short periods. 1915-16. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 35 37 40 25 1,300 680 340 171 81 . 41 31 35 38 40 85 1,300 600 340 169 79 41 31 35 38 40 850 1,110 530 285 167 78 40 31 35 38 460 3,370 1,110 460 285 165 76 39 30 35 39 340 1,150 1,110 600 285 163 75 39 30 34 39 130 760 1,200 760 285 161 74 38 30 34 39 130 600 940 680 285 160 72 37 30 34 40 130 460 915 600 230 158 70 37 30 34 40 85 460 885 530 230 155 68 36 30 34 40 85 1,390 860 460 230 150 66 35 30 34 40 40 940 830 460 227 a 145 64 35 o31 35 40- 40 600 805 460 224 140 62 35 a 31 o35 40 40 600 775 460 221 135 60 34 a 31 35 40 230 600 750 460 217 130 58 34 a 31 35 40 180 760 720 460 214 125 56 34 a 31 35 40 130 760 695 340 211 120 54 34 «32 35 40 130 15,000 665 340 208 115 52 34 o32 35 40 40 6,660 640 340 204 110 50 33 a 32 a 35 40 40 3,340 610 340 201 105 49 33 a 32 a 35 40 40 1,690 585 460 198 100 49 33 a 32 a 35 40 40 1,490 555 460 195 95 48 33 a 33 «35 40 40 1,310 530 460 191 93 47 33 a 33 36 40 25 1,310 530 460 188 92 47 32 33 36 40 25 1,140 460 460 185 91 46 32 33 36 40 10 1,690 460 400 183 89 45 32 32 36 40 10 1,490 460 400 181 88 45 32 32 36 . 40 10 6,220 940 400 179 87 44 32 31 36 40 10 7,980 940 340 177 85 43 31 30 37 40 10 6,300 760 340 175 84 43 31 30 37 40 25 2,000 340 173 83 42 31 29 37 25 1,300 340 82 31 28 26 26 26 26 25 25 50 i Gage not read; discharge interpolated. 534 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Daily discharge, in second-feet, of Santa Ynez Bivernear Lomvoc, Calif., for 1906-1908 and 1910-1918— Qontmvmdi. Day. Apr. May. July. 1,000 4,500 750 190 140 140 140 140 250 320 400 490 320 320 250 320 320 320 O320 o400 «500 250 250 250 250 250 400 600 490 400 320 320 320 320 320 360 360 320 285 192 192 192 435 1,610 5,500 1,920 1,220 4,480 2,140 950 830 25 25 25 25 25 70 70 100 900 13,300 14, 400 6,230 3,580 2,830 2,340 2,150 2,150 1,800 710 710 600 600 600 600 550 550 a 525 «500 1475 a 450 425 a 400 o. 375 o350 320 320 320 320 320 320 285 285 285 285 285 285 252 252 220 1,500 1,200 1,200 1,200 1,350 1,420 4,300 4,020 3,350 6,750 4,500 4,020 2,830 2,520 2,150 11,700 3,800 2,520 2,240 1,980 1,650 1,530 1,420 1,300 1,180 1,070 950 835 220 220 192 192 192 192 192 192 192 192 192 192 192 192 192 190 190 190 190 190 165 165 165 165 140 140 ol32 a 124 a 116 440 411 .383 392 a 24 24 a 24 a 24 a Gage not read; discharge interpolated. Note.— No gage-height record Nov. 4-23, discharge interpolated; Apr. 21-30, discharge estimated 8 second-feet; and May 1-18, discharge estimated as 240 second-feet. SANTA BARBARA COUN^TY. 535 Monthly discharge of Santa Ynez Rivei' near Lompoc, Calif., for 1906-1908 and 1910- 1918. Discharge in second-feet Maxi- Mini- mum, mum. Run-off (total Discharge in second -feet. Maxi- Mini- mum, mum. Run-ofif (total 1906-7. November, 10-30. December January, 1-7 September, 25-30 1907-8. October November December January February March April May June July August September The year 23 1,090 1,330 30 555 197 122 5,070 4,630 1,120 295 240 90 90 30 122 5, 070 October November December The period. 1910. January February.. March April. May.. June July August September The period.. 1910-11. October November December January February March April May June July August September 11,100 225 1,260 550 95 52 30 22 30 42 17,300 4,930 20, 400 1,400 590 274 127 97 48 The year 1911-12. October November December January February March April May June July August September The year 1912-13. October November December January February March April May June July 20, 400 670 540 150 70 29 23 21 23 25 32 125 4,470 350 93 47 26 17 30 67 67 67 790 350 197 90 90 30 18 18 442 30.0 613 236 145 90 53.3 19.2 23.1 18 18 38.5 225 150 90 95 53 30 20 20 22 872 161 271 188 76.7 39.1 24.0 21.0 23.1 22 22 30 30 230 1,150 530 279 127 23.0 29.1 31.0 1,060 1,000 5,020 836 374 204 114 69.1 44.8 37.6 37.0 61.2 69.8 41.4 202 162 102 48.7 26.5 21.5 .21.0 i9. 4 21.7 24.1 27.8 47.6 365 164 63.3 36.3 23.4 13.7 479 10, 400 6,140 357 7,010 5,390 4,720 42,200 108,000 37, 700 14,000 8,920 5,360 1,110 1,070 2,370 53, 600 8,940 16, 700 11,200 4,720 2,330 1,480 1,290 1,370 102, 000 1,410 1,730 1,910 65, 200 55, 500 309, 000 49, 700 23, 000 12, 100 7,010 4,250 2,670 533, 000 2,310 2,200 3,760 4,290 2,380 12, 400 9,640 6,270 2,900 1,630 1,320 1,250 59, 400 1,330 1,430 1,710 2,930 20, 300 10, 100 3,770 2,230 1,390 842 1912-13. August September The year . 1913-14. October November December January February March April May June July August September The year . 1914-15. October November December January February March April May June July August September The year . 1915-16. October November December January February March April May June July August September The year . 1916-17. October November December January February March April May June July August September The year . 1917-18. October November December January February March April May June July August September The year.. 11 227 92 30, 800 25, 500 2,500 635 217 126 48 37 34 30, 800 29 33 270 5,300 32, 500 1,650 365 1,720 165 96 59 38 32, 500 40 460 15, 000 1,300 760 340 171 81 41 33 50 15, 000 75 44 4,500 600 5,500 710 220 116 73 26 23 20 5,500 22 26 24 25 14, 400 11, 700 800 135 87 39 47 14, 400 12.3 11.0 8.9 49.7 30.3 3,610 3,900 952 359 161 82.7 42.9 34.4 32.4 754 28 49 67 837 365 250 175 85 60 38 31 26.9 30.6 86.7 345 4,740 690 293 405 131 77.9 46.2 35.6 547 84.5 2,330 808 465 225 123 58.1 34.6 31.0 26.3 57.0 39.7 267 342 821 412 177 94.6 48.1 24.5 22.1 19.0 190 22 22 25 835 19.4 24.7 23.0 23.3 1,800 2,620 457 203 101 62.7 34.2 37.8 443 320, 000 536 STJEFACE WATEE OF PACIFIC SLOPE, SOUTHEKN CALIFORNIA. MONO CREEK NEAR SANTA BARBARA, CALIF. Location.— In S. ^ sec. 8, T. 5 N., R. 26 W. (unsurveyed), at Mono Flat dam site, about half a mile below mouth of Indian Creek, half a mile above junction with Santa Ynez River, 3 J miles east of river measurements station on Santa Ynez River at Gibraltar dam, and 8 miles northeast of Santa Barbara, Santa Barbara County. Drainage area. — 126 square miles. ^ Elevation. — About 1,400 feet above sea level. Records available. — January 1, 1903, to June 30, 1904. Gage. — Inclined staff fastened to willow tree on right bank about 500 feet below dam site, Discharge measurements. — Made from cable just above gage or by wading. Discharge. — Measured by weir November 1 to December 31, 1903. Channel and control. — Sand and gravel; fairly permanent. Both banks are high and not subject to overflow; channel slightly curved for about 500 feet above and below gage. Diversions. — No information. Regulation. — No information. Discharge measurements of Mono Creeh 7iear Santa Barbara, Calif. , for 1902-1904. [Made by H. Rankin and R. L. North.] Date. Gage height. Dis- charge. Date. height. Dis- charge. Date. Gage height. Dis- charge, 1902. Nov 11 Feet. Sec.-ft. 8.7 295 20 12.5 9.0 14.8 10.1 0.9 8.8 8.2 8.1 12.0 8.8 8.4 8.8 8.2 7.6 4.9 5.1 5.0 5.1 5.2 4.8 4.7 4.6 4.6 4.6 4.4 3.8 3.8 3.6 3.6 3.6 11.0 26 13.6 13.3 9.8 e.6 6. 3 6.6 6.5 9.2 7.5 9.8 9.9 8.2 8.0 7.1 7.1 7.2 7.2 \ 1903. ! Mar. 25 F,H. 2.50 1.90 1.70 1.60 1.61 2.05 2.80 4.50 3.00 2.50 2.40 2.20 2.00 1.90 1.85 1.80 1.77 1.73 1.70 1.65 1.63 2.20 2.40 2.30 2.35 2.10 2.00 1.90 1.85 1.80 1.75 1.70 1.70 1.67 1.65 1.60 1.58 1.56 1.55 1.52 1.50 1.50 1.50 1.48 1.48 1.48 1.47 1.45 1.45 1.43 1.43 1.43 1.42 1.42 Scc.-ft. 153 62 36 27 30 177 227 710 270 131 92 69 52 41 40 39 34 29 28 26 25 71 106 94 90 72 59 46 43 38 36 29 .28 28 27 24 21 19.2 18.9 17.2 17.0 16. 4 15. 6 14.3 14.0 13.8 13.6 13.5 11.8 11.7 11.7 11.8 10.3 10.0 1903. May 22 Feet. 1.42 1.42 1.41 1.41 1.40 1.40 1.40 1.40 1.37 1.35 1.33 1.30 1.28 1.28 1.35 1.40 1.45 1.40 1.35 1.33 1.30 1.30 1.30 1.29 1.22 .80 1.89 1.41 1.90 1.48 1.35 1.33 1.71 1.52 1.48 1.52 1.43 1.95 1.77 1.64 1.45 1.42 1.63 1.63 1.62 1.46 1.43 1.32 1.32 1.32 5«.# 2.95 1.55 1.30 1.25 1.35 1.30 1.20 1.28 1.28 1.21 1.35 1.29 1.28 1.27 1.26 1.25 1.20 1.20 1.20 1.20 1.20 1.19 1.19 1.17 1.15 1.15 1.15 L14 1.14 1.12 1.12 1.12 1.30 l.GO 1,37 1.35 1.30 1.25 1.22 1.22 1.22 1.27 1.25 1.30 1.32 1.2G 1.25 1.24 1.24 1.23 1.23 26. 23 25 26 27 28 9.1 1903. 27 8.8 Jan. 28 28 8.4 29 29 7.7 30 30 7.5 31 31 29 7 5 Feb. 1 \^^-v 30 7.4 June 1 6.2 3 3 2 5.7 4 4 3 5.7 5 4 4.4 C e::::::::: 5 3.4 8 7 6 3.?. 5.1 9 8 8 10. -- 9 9 8.J2 11 10. 10 10.6 12 11 11 8.6 13 . 12 12 4.7 14 14 13 4.4 16 15 15 3.3 17. 16 16 3.2 18 17 17 3.2 19 18 18 3.0 20":: : 19 20 2.0 21 20. July 12 .4 23 21 1904. Feb. 28 24. 22 25 23 30.0 26 24 29 3.5 27. 25 Mar. 11 32.0 28 27 12 8.0 Mar 1 28 13 2.6 2 29 14 2.3 3 30 25 18.2 4 May 2 27 . 8.2 5 3 29 7.9 6 4 Apr. 1 8.1 7 5 3 19 20 4.1 9 6 34.0 10 7 19.4 n 8 21 24 25 26 27 9.7 12 10 5.4 13 11 4.0 14 12 8.9 15 13 8.8 16 14 29 May 1 8.2 17 15 . . . 6:4 18 16 7 : : : : : : : : : 9 4.2 19 17 2.1 90 18 19. .. 2.0 21 11 2.0 22 20 23 21 'Previously pul^lished as 119 square miles. SANTA BARBARA COUNTY. 537 Daily discharge, in second-feet, of Mono Creek near Santa Barbara, Calif, for 1903-4- Jan. Feb. Mar. Apr. May. June. Day. 1903. 16 17 18 19 20 21 22 23 24 25 26 , 27 Jan, 295 20 13 9 Feb. Apr. May. June. Day. Dec. Jan. Feb; Mar. Apr. May. 0.05 0.04 0.04 0.88 7.4 5.3 .05 .04 .04 .49 5.6 5.6 .05 .04 .04 .30 4.4 6.0 .04 .04 .04 .10 3.1 6.3 .05 .04 .04 .10 3.1 4.4 .05 .04 .04 .09 3.1 2.8 .04 .04 .04 .08 2.8 1.9 .05 .04 .04 .06 2.4 1.9 .04 .04 .04 .06 2.4 1.9 .05 .04 .04 .19 2.4 1.9 .05 .04 .04 31 2.4 1.9 .05 .04 .03 6 2.4 3.3 .05 .04 .06 2.4 2.4 3.1 .05 .04 .06 2.0 2.4 3.1 .05 .04 .06 2.0 2.4 2.8 .05 .04 .23 1.9 2.4 2.8 .05 .04 .09 1.7 2.6 2.6 .05 .04 .03 1.5 2.6 2.4 .05 .07 .03 1.1 35 2.2 .05 .05 .03 1.1 21 2.2 .05 .05 .03 1.1 13.3 2.4 .05 .04 .03 1.1 10.2 2.4 .05 .04 .03 1.6 7.4 2.2 .05 .04 .03 76 5.0 2.0 .05 .04 .03 17.4 4.1 2.2 .05 .04 .03 11.2 12.8 2.4 .05 .04 285 7.4 12.8 2.2 .05 .04 30 6.6 12.8 2.0 .05 .04 3.8 6.0 12.2 1.9 .06 .04 6.6 11.2 1.7 .06 .04 7.4 1.5 1903-4. 1 2 3 4 5 6 7 8 : 9 10 11 12 13 14 15 16 17 18 19. 20 :. 21 22 23 24 25 20 27 28 29 30 31 1.4 1.4 1.4 1.4 1.4 1.3 1.0 1.3 1.3 1.1 1.1 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 .9 Monthly discharge of Mono Creek near Santa Barbara, Calif, for 1903-4. Discharge in second-feet. Rim-oii (total* in acre- feet). Month. Discharge in second-feet. Run-ofl (total Month. Maxi- mum. Mini- m_um. Mean. .Maxi- mum. Mini- mum. Mean. in acre- feet). 1903. January ......... 295 15 227 710 26 11 0.2 4 4 25 6 2 11 7 30 81 13 5 676 389 1,845 4,820 799 198 1903-4. 0.05 .05 0.04 11 6.3 7.1 2.8 1.1 3 February December 3 March 0.07 285 ' 76 35 6.3 1.4 0.04 .03 .06 2.4 1.5 .6 .2 633 387 April February May June 1-20 April .... 422 172 65 The period.. 8,730 " The period . . t 1,690 1 Note.— Discharge for 1903 obtained by interpolating between discharge measurements. 538 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. MISCELLANEOUS MEASUREMENTS. Measurements of stream flow in the basin of Santa Ynez River at points other than those at which gaging stations have been main- tained are recorded in the following table: MiscellaneoiLS measurements in Santa Ynez River drainage basin for 1903-1918. Date. Stream. Tributary to- Locality. Dis- charge. May 23,1918 June 14,1918 Santa Ynez River... . ..do Pacific Ocean ... .do 300 feet above jtmction with Mono Creek. Just above junction with Mono Creek. do 450 feet above mouth of Santa Cruz Creek. 300 feet above mouth of Santa Cruz Creek. At San Lucas Bridge, 3J miles southeast of Santa Ynez. do 7.0 Aug. 1, 1918 May 22,1918 July 30,1918 May 22,1918 July 30,1918 May 28,1914 do do do do 1.0 67 do. . do 4 6 do . . do 104 do do 9.6 do do Solvang 89 May 29,1914 Sept. 25, 1905 Apr. 19,1906 July 25,1906 do . do.... do 89 . ...do . ...do 8.8 do do . " do 358 do do do 21 Sept. 25,1906 Nov. 10,1906 do do do.... 7.1 do . do.... 10 Dec. 12,1908 do do do . . do . ' do 259 Dec. 28,1913 3 miles east of Surf 53 Jan. 5, 1914 do do do 101 Jan. 9, 1914 do . . .do do 65 Jan. 13 1914 do do do 58 Jan. 15, 1914 do do do 294 Jan. 18, 1914 do do do.... 22,700 3 420 Jan. 19 1914 do do .. do Jan. 20, 1914 do . ..do do l|440 1,060 577 Jan. 21, 1914 do. .. do do Jan. 24,1914 do do .do Apr. 10,1903 Blue Canyon Creek. . do Santa Ynez River.. . do.... Mouth . . n.i Apr. 22,1903 Apr. 29,1903 May 23,1918 do 11.7 do .do do 6.3 Mono Creek. do 50 feet above mouth . . 21 June 14 1918 do do Just above mouth. 8.3 Aug. 1, 1918 Apr. 11,1903 Apr. 15,1903 Apr. 21,1903 Apr. 23,1903 Apr. 28,1903 Mav 23,1918 do do... do 2.0 Amagusa Creek 0.... do Mouth. . 6.2 do . ...do 4.5 do .do do 7.6 do do do.... 6.9 do do do 6.3 Camuesa Creek do do do 2.2 June 14 1918 do do. . . . . .7 Aug. 1,1918 Apr. 11,1903 Apr. 15,1903 Apr. 21,1903 Apr. 23,1903 Apr. 28,1903 May 23,1918 June 14,1918 do RuizCreekf>... do do do do .4 5.4 do do do ... 4.3 . . do do . ...do 7.0 do. ... do do 5.7 do do ... do . - 4.5 Gidney Creek .. do do do Mouth. Stream enters from south 1 mile below Camuesa Creek. do 1.0 .24 Apr. 10,1903 Apr. 22,1903 Feb 1] 1914 Trail Creek do Mouth 1.4 do Devils Canyon Creek do do : do do 2.0 do Mouth, near Gibraltar dam site.... do 4.8 Feb 12 1914 do 2.9 Feb. 13^1914 do do 2.4 Feb. 17 1914 do . . do do 2.1 Apr. 2l'l914 Jan. 13,1917 do do do 1.0 do do do 2.0 Feb 7 1917 -do .... . .do do .65 Feb 9 1917 do do do .6 Feb. 10'l917 do do do .5 Feb. 28,1917 Mar 14 1917 do-..^ do do do do - do • 9.7 3.8 May 24' 1918 May 31,1918 June 14 1918 do do do . ... .6 do do ...do .3 do . . ..do ... do .13 May 22' 1918 July 30,1918 Santa Cruz Creek do do 300 feet above mouth 20 do do 2.3 a Believed to be Camuesa Creek on U. S. Geological Survey map. b Believed to be same as Gidney Creek, not named on U. S. Geological Survey map. SANTA BABBARA COUNTY. 539 MISCELLANEOUS MEASUREMENTS OF STREAMS IN SANTA BARBARA COUNTY. The following miscellaneous measurements have been made on streams in Santa Barbara County for 1889-1918: Miscellaneous measurements of streams in Santa Barbara County, Calif. Date. Stream. Locality. Dis- charge. Aug. -,1889 Aguilar Creek Sec.-ft. 0.12 .08 Do Armitas Creek. .04 Do .23 June 21,1902 do .0036 Aug. —,1889 .08 .15 Do Canada Lares .08 Do .31 Do Canada Verde .08 Do Capitan Creek .23 Do Carpinteria Creek do 1 mile above Placitas road .. .08 June 16,1900 Sept. 13, 1916 Aug. 13,1897 Sept. 6,1897 Sept. 12, 1897 Oct. 2, 1897 Dec. 8,1897 Jan. 26,1898 do .003 do Cold Spring Canyon Creek. . . do .1 Falls .08 do .06 do do.... .09 ..do ... do .09 do do.... .09 do do .11 June 10,1900 Mar. 22,1896 Aug. -,1889 Mar. 22,18% Aug. 13,1897 do do.... .00 do do do .00 .23 Cold Spring Canyon, City tunnel. do .06 .66 Sept. 6,1897 do .31 Sept. 12, 1897 do .31 Oct. 2,1897 .. ..do .28 Dec. 8,1897 do .22 Jan. 26,1898 do .22 Apr. 19,1898 June 10,1900 do .22 do Portal .41 June 14,1900 do Station 29+97 .02 Do do do .04 Aug. —,1889 .23 Do D OS P ueblos Creek .54 Do .58 Jan. 9, 1916 Do do Proposed dam site 4.2 do 4.2 June 28,1917 May 21,1918 Aug. —,1889 do West fork of Gaviota Creek. . Maria Ygnacio Creek .... 200 feet above Gobemador Water Co. 's diversion. One-fourth mile above junction with Canada de las Cruces. 1.4 1.1 .23 Jan. 15,1888 Jan. 24,1888 Feb. 7, 1888 Mission Creek . . . 200 feet above dam .93 do do do do 2.80 L37 Mar. 16,1888 July 26,1888 July 13,1889 do do do do 2.23 .36 . ..do do .43 Aug. —,1889 do do .... .46 Sept. 1,1889 June 11, 1892 June 17, 1900 do do do do do do .32 .36 .05 Aug. —,1889 Padero Creek .31 Do Rincon Creek.. .12 June 16,1900 Aug. —,1889 ..do .03 San Jose Creek .27 Do San Pedro Creek... .08 June 17,1900 Do San Roqui Creek Above tunnel .03 do Below tunnel .03 May 2, 1900 do Station 6, opposite tunnel .04 Do do Station 8^ opposite tunnel .02 Do . ...do .08 June 21,1902 do do .25 Do do TJp.lnw tnnnel .009 Do do Station 44, opposite tunnel .011 Do do Station 65^ opposite tunnel .0063 540 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. Miscellaneous measurements of streams in Santa Barbara County, Calif. — Continaed. Date. Stream. Locality. Dis- charge. Nov 2 1899 San Ysidro Creek Above dam Sec.'ft. 0.06 Dec. 3, 1899 Mar. 6 1900 ....do.. do . .. .15 do do .... 1.00 Mar. 19,1900 do....... do .35 June 16,1900 do do. . - .07 Aug. —,1889 June 16,1900 Aug. —,1889 June 16,1900 Santa Monica Creek .23 do .: .11 Tecoiote Creek .27 Toro Canyon . . . .05 SANTA MARIA RIVER BASIN. GENERAL FEATURES. Santa Maria River drains the northern slope of the San Rafael Mountains and a smaller area of foothill country north of that range. It flows westward, finally discharging its waters into the Pacific Ocean at Guadalupe, about 25 miles south of San Luis Obispo. Its flow is torrential; it is subject to floods of short duration during the rainy period, but is practically dry during the summer. It has numerous tributaries, the most important of which is the Sisquoc, which enters it about 12 miles above the town of Santa Maria. The country in this basin consists of rolling foothills, except the hi^er portions of the San Rafael Mountains, which reach elevations of 6,000 to 8,000 feet. The river breaks from the foothills at a point where it is joined by the Sisquoc and flows through the flat country of the Santa Maria Valley for about 25 miles until it joins the Pacific Ocean. The rocks in this basin consist of shale, sandstone, and conglomerate, which are covered by a heavy clay soil. There is a considerable growth of timber on the higher parts of the San Rafael Mountains, but over most of the area the growth of timber is light, and large areas are covered v/ith brush and grass. Pasturage is car- ried on extensively throughout the basin. There are no diversions along this stream for irrigation, although tunnel work has beeen attempted above Santa Maria for developing underground water, with poor results. Numerous wells in the vicinity of Santa Maria produce considerable' water for irrigating land in that locality, the soil being very deep and exceptionally good, susceptable of the highest cultivation. The mean precipitation in this basin is probably about 25 inches. The greatest rainfall occurs on the lower elevations near the coast. The higher elevations receive some snowfall, which melts early in the spring and does not tend to keep up the flow of the streams through the summer. SANTA MARIA RIVER BASIN. 541 GAGING-STATION RECORDS. SANTA MARIA RIVER NEAR SANTA MARIA, CALIF. Location. — At Dutard ranch, just below Buckhorn Canyon and above Alamo Creek, 21 miles by highway northeast of Santa !Maria, Santa Barbara County. Drainage area.— Not measured. Records available. — October 22, 1903, to December 31, 1905. Gage.— Inclined staff fastened to a rock ledge on right bank just below mouth of Buckhorn Canyon. Discharge measurements. — Made by wading at low and medium stages; high- Avater measurements by floats near gage. Channel and control. — Sand and gravel; fairly permanent. Right bank is high and rocky; left bank low and covered with scattering trees, not subject to overflow Channel slightly curved for 300 feet above and curved for 1,000 feet below gage. Diversions. — No information. Regulation. — No information. Accuracy. — Records fair. Discharge measurements of Santa Maria River near Santa Maria, Calif., for 1903-1906. Date. Made by— Gage height. Dis- j charge. Date. Made by— Gage height. Dis- charge. 1903. Aug. 26 Oct. 22 1904. Feb. 18 W. B. Clapp Feet. Sec.-ft. 15.5 a 220 499 1905. Feb. 2 Mar. 21 1906. Feb. 23 June 6 Nov. 7 E. C. La Rue Feet. 3.30 2.70 1.20 .90 b2.20 1.70 Sec.-ft. 80 .--.do- do J. A. Thompson do 1.97 2.65 3.60 4.00 0. W. Peterson do R. S. Hawley 47 67 17.9 Mar. 12 24 . do do 11.9 4.9 a Float measurements. b Zero of gage lowered 2 feet. Daily discharge, in second-feet, of Santa Maria River near Santa Maria, Calif., for 1903-4- Day. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May. June, 1903-4. 1 0.8 0.8 .8 .8 .9 1.0 L5 1.7 2.0 2.0 2.0 2.3 2.5 2.6 2.8 2.9 3.0 3.0 3.2 3.2 3.2 3.4 3.4 3.4 3.6 3.8 4.2 4.. 4 4.4 4.6 4.6 4.8 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 7 7 7 7 7 7 7 7 7 7 7 7 7 7 ■ 7 7 7 10 10 10 10 8 8 10 10 9 70 18 16 13 12 10 10 9 8 7 7 27 13 13 12 12 10 .8 7 7 6 6 6 18 220 53 140 27 16 13 10 7 10 8 8 53 27 53 18 22 13 40 18 13 14 13 8 5 4.4 3.0 2.5 2.1 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 3.0 7 5 5 3.0 3.0 3.0 5 7 6 3.0 3.0 3.0 3.0 3.0 2.8 2.5 2.5 2.5 2.5 2.0 1.5 1.0 LO 1.0 .5 .5 .4 .3 .2 .2 .3 .3 .3 .3 .3 .3 .3 .2 .2 .2 .2 0.2 2 .2 3 2 4 2 .8 .2 6... . 7 1 .2 8 - .2 9 .2 10 .8 .2 11 2 12 .2 13 2 14 15 .8 .2 16- - 17 .2 18- -. 2 19 20 .8 2 21 .2 22 6.8 ..8 .8 .8 .8 .8 .8 .8 .8 .8 ."s" ."s" .2 23. .. 2 24 .2 25 .2 26 .2 27 28- .. .2 29 ,2 30 .2 31 _ .2 Note: No record July 1 to Sept. 30, 542 SURFACE WATER OF PACIFIC SLOPE, SOUTHERIT CALIFORNIA. Daily discharge, in second-feet, oj Santa Maria River near Santa Maria, Calif., for 1903-4— Continued. Day. Oct. Nov. Dec. 450 10 11 175 10 12 175 10 12 175 10 13 175 10 13 175 10 14 242 10 14 325 10 14 84S 10 14 362 10 13 Day. Oct. Nov. Dec. 400 10 14 175 11 16 53 12 16 10 12 17 10 11 17 9 11 17 9 11 17 9 11 18 9 11 17 9 11 18 Day. Oct. 1904 1 2 s 4 5 6...... 7 8 9 10...:.- 1904, 11 12 13 14 15 IG 17 18 19 20 1904 21 22 23 24 25 26 27 28 29 30 18 18 19 18 19 20 20 18 18 18 53 Monthly discharge of Santa Maria River near Santa Maria, Calif , for 1903-1905. 1903-4. October 22-31.. November December January February March April May Juiie The period. 1904-5. October November. . December . . January Discharge in second-feet Maxi- mum. 450 12 53 122 Mini- mum. 6 1.5 0.8 .8 2.8 5.9 12.2 28.2 4.0 1.1 109 10.7 17.3 22.5 Rim-off (total acre- feet). 16 48 172 363 702 1,734 238 68 12 3,350 6,702 637 1,064 1,384 1904-5. February March April May June July August September... The year. . 1905. October November December The period. Discharge in second-foet. Maxi- mum. 1,915 10,000 18 .74 Mini- mum. 361 574 14.5 15.5 5.9 5.0 2.7 1.6 95.0 5. 4 8.6 11.7 Run-off (total acre- feet). 20,050 35,290 863 953 352 307 166 96 332 512 719 MISCELLANEOUS MEASUREMENTS. Measurements of stream flow in the Santa Maria River basin, at points others than those at which gaging stations have been main- tained are recorded in the following table: Miscellaneous tneasurements in Santa Maria River drainage basin. Date. ' Stream. i Tributary to- Locality. Dis- charge. Sept. 9, 1911 Aug. 25, 1903 Oct. 23, 1903 Santa Maria River Sisquoc River . Pacific Ocean Wagon bridge at Santa Maria. Sisquoc ranch ... Sec.-fl. Dry Santa Maria River do 1.1 do do Dry SURFACE WATER OF PACIFIC SLOPE, SOUTHERN" CALIFORI^IA. 543 FLOODS. RECORDS OF FLOODS. Southern California is subject to sudden and severe floods. The streams are comparatively short and grades are very steep from the headwaters to the mouths of the canyons. The channels from the canyons to the sea are usually broad, shallow, and comparatively flat and do not have sufficient capacity to carry the larger floods. iVs a result the streams overflow their banks and readily form new channels in the porous, sandy soil. (See descriptions of river basins.) There are three important factors depending on precipitation in the production of floods in southern California — the interval between the last rain and the flood, the intensity of the rainfall, and the total rainfall for the storm. The following table shows the frequency of floods in southern California since 1878: Floods in vicinity of Los Angeles, Calif., for the 37 years 1878-1914.^ Precipi- Date. tation in 24 hours (inches). Flood character. Remarks. Jan. 16,1878 1.16 Light Bridges washed av/ay. Do. Feb. 19, 1878 1.33 Moderate Dec. 20, 1879 4.34 do Mountain streams swollen. Bridges washed away. Rail- way travel suspended. Dec. 20, 1880 2.26 do Streets almost impassable. Feb. 17, 1884 3.56 Heavy Severe flood. Great amount of damaqe. (Harbor silted.) Mar. 9, 1884 2.67 do Los Angeles River in flood. Houses washed away. Lower portion of city under water. Flood quite severe. Jan. 19, 1886 3.77 do Several lives lost. Feb. 16, 1887 3.94 Moderate.... Severe flood, but not so bad as last year. Lower part of city flooded. Jan. 4, 1888 3.39 do Several washouts in vicinitv. Dec. 23, 1888 2.72 do Many washouts. Streets flooded. Damage not commen- surate vnt\\ severity of storm. Mar. 17, 1889 2.53 Light Washouts. Streets in bad condition. River did not overflow. Oct. 23, 1889 3.62 Moderate.... Washouts on railroads. Unprecedented rainfall for this time of year. Streets flooded. Dec. 12, 15, 1889 4.30 Heavy Traffic paralyzed by washouts. Streets flooded. Dec. 25, 1889 3.82 do The flood was scarcely less severe and disastrous than that of 1884. (Harbor silted.) Jan. 26, 1890 4.17 do Flood. Streets turned into rivers. Traffic suspended. (Harbor silted.) Feb. 23, 1891 2.75 Moderate.... Many washouts. Bridges carried awav. River high. Mar. 21, 1893 2.82 do Streets flooded. Dec. 21,1894 1.33 Light Do. Jan. 17, 18, 1895 1.73 -...do Do. Dec. 28, 1896 1.22 do Do. Jan. 14, 15, 1897 1.57 do Do. Feb. 20, 1897 2.02 do Do. Nov. 21, 1900 3.79 Moderate.... Flood. Feb. 6, 1901 2.55 Light Streets flooded. Oct. 27, 1901 1.79 do Streets flooded. Railroad traffic temporarily suspended. Nov. 11,1902 1.95 do Streets flooded. Mar. 25, 1903 3.35 Moderate Do. Feb. 4, 1905 2.25 Light Do. Mar. 13, 1905 2.41 Moderate. . . . San Gabriel and Santa Ana rivers very high. Streets flooded. Traffic interrupted. Tan. 19, 19g6 2.20 Light Streets flooded but no serious damage. Mar. 20, 1906 1.75 Moderate Los Angeles River higher than for many years. Streets inundated. Jan. 7, 8, 1907 1.64 Light Streets flooded. Jan.2i, 1908 1.76 do Do. Jan. 21, 22, 1909 3.17 Moderate. . . . Streets flooded. Traffic interrupted. Dec. 31, 1909. 1.99 do Streets flooded. Jan. 28, 1911 2.97 do Do. Mar. 9, 1911 1.99 Heavy Light Streets flooded. Traffic interrupted. (Harbor silted.) Streets flooded. Mar. 9, 12, 19"l2 2.04 Feb. 24,1913 5.12 Moderate Streets flooded. Traffic interrupted. Jan. 25, 1914 2.60 do Do. Feb. 18, 1914 4.26 Heavy Streets flooded. Traffic interrupted. Bridges washed away. (Harbor silted.) See PI. XVLI, A, p. 492. oCarpenter, Dr. F. A., Flood studies at Los Angeles: Monthly Weather Review, vol. 42, No. 6, June, 1914. 544 SIJKFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. To make the record complete the floods of January 17 and 27, 1916, should be added to the above table. Records of run-oif , precipita- tion, damage to property, and general information regarding these floods were published by the Geological Survey in Water-Supply Paper 426, ''Southern California floods of January, 1916," by H. D. McGlashan and F. C. Ebert. The following table gives the maximum discharge, for the flood of 1916 for most of the important streams in southern California: Cre&t discharges, in second-feet, of streams in southern California for January, 1916. Station. Date. Time. Gage. height (feet). Drainage area (square miles). Dis- charge. Dis- charge per square mile. Cottonwood Creek at Morena reservior . . Jan. 27 . do.. . 4-6 p. m ... 120 98.0 09.8 43.7 112 135 172 181 102 102 189 375 434 12 74.9 3.55 53.4 53.4 110 110 299 57.3 209 209 322 565 565 189 15,356 a 23, 500 18, 100 9,870 24,295 27, 530 43,002 45,500 4,710 15,800 6 36,300 70,200 75,000 2,393 18,600 668 10, 600 21,100 14, 300 28,400 72, 100 7,140 21, 400 58, 600 75, 000 40, 000 95, 600 29, 100 40,000 16, 000 30, 000 14,000 9,550 40,000 7,268 31,113 3,150 6,215 18,600 128 Otay River at Lower Otay reservoir Jamul Creek near Otay . . 238 do 259 . .. do 226 • SAweetwater River near Dehesa do . . 217 ...do 204 Sweetwater River near Jamacho do.. . 250 Sweetwater River at Sweetwater reser- ...do.... Jan. 18 Jan. 28 Jan. 27 ...do ...do.... ...do.... do .. .4.30-5.30 p. m.. 251 voir. San Diego River at diverting dam Do 6 a. m 46 155 £an Diego River at Capitan Grande dam site. San Diego River near Santee San Diego River at San Diego Boulder Creek at Cuyamaca reservoir . . 192 7 p. m 25.1 187 173 6 p. m 199 San Vicente Creek at mouth 248 Swltzer Canyon at San Diego Santa Ysabel Creek near Mesa Grande . ...do.... Jan. 17 Jan. 27 Jan. 17 Jan. 27 ...do.... ...do.... Jan. 17 Jan. 27 ...do.... Jan. 17 Jan. 27 Jan. 27 do 188 199 Do 11 395 Santa Ysabel Creek near Ramona 9 p. m 130 Do 7 p. m 258 San Dieguito River at Carroll dam site. Santa Maria Creek near Ramona 1-3 p. m 5pm 21.2 15.9 12.8 18 18.1 211 125 San Luis Rey River near Mesa Grande. Do .. . . 1.45p.m 4.30 p. m...... 117 280 San Luis Rey River near Pala San Luis Rey River at Oceanside Do 233 71 9.30 p. m 109 154 Jan. 18 9 40 a. m 108 717 65.8 222 278 San Jacinto River near Elsinore South Fork of San Jar-into River at Jan. 28 Jan. 27 Jan. 18 11 a. m 4 p. m 19 19.5 145 Hemet reservoir. 7 a. m 12 180 Los Angeles River near Dorainguez Junction. Arroyo Seco near Pasadena Jan. 17 9.30 a. m 9.3 16.4 192 Jan. 17. 1 i 18.7 216 a Reported by George Cromwell, city engineer, San Diego, Calif. (See Engineering News, vol. 75, No. i.5,p. 718.) b Mean of two estimates computed from cross sections and slope data. FLOOD OF 1914.1 DISTRIBITTION OF RAINFALL. From February 15 to 25, 1914, precipitation was general over a large part of California. In the vicinity of Los Angeles the storm period extended from February 18 to 21, the total precipitation in ' Abstracted from reports of the board of engineers for flood control to the board of supervisors, Los Angeles County, and records of the United States Weather Bureau. FLOODS. 645 the four days exceeding 19 inches at stations in the mountains and about 3 inches on the coast. This storm was preceded by heavy general precipitation in January that thoroughly soaked the ground. The monthly departure from the normal for January was much greater than that for February, but the precipitation in January covered 10 to 12 days, whereas that for February occurred within 4 days. The hourly distribution of the rainfall as recorded by the United States Weather Bureau at the station at Los Angeles and the total rainfall for the storm at 40 stations in the Los Angeles dis- trict are shown in the f ollowing^tables : Hourly precipitation, in inches, for Feb. 18-21, 1914, at Los Angeles, Calif. [From unpublished records of United States Weather Bureau.] A. M. Date. 1 2 3 4 5 6 ' 9 10 11 12 Feb. 18 0.07 .01 .07 .02 0.06 .01 .11 .06 Tr. .01 .04 .03 0.01 .02 .11 .01 0.08 .07 .04 Tr. 0.24 .03 Tr. .02 0.33 Tr. Tr. .01 0.07 0.11 0.15 0.02 Tr. Tr. 0.06 19 .01 20... 21 P. M. Feb. 18 0.50 1.49 0.29 0.28 0.35 0.04 Tr. .21 0.08 .02 .36 0.01 .02 .25 0.01 .22 .15 Tr. .25 .01 Tr. .05 .06 0.01 19 .22 20 Tr. .24 .03 .01 Tr. 21 . 1 Total precipitation for storm of Feb. 18- U, 1914, at stations in the vicinity of Los Angeles, Calif. [From flood studies at Los Angeles, l.y Dr. Ford A. Carpenter, in Monthly Weather Review, vol. 42, No. 6, June, 1914.] Station Rainiall. Station. Rainfall. Avalon Inches . 3.45 13.26 10.83 4.81 10.92 17.85 4.31 8.63 4.85 6.44 9.41 5.68 6.75 3.24 7.07 11.10 19.20 19.40 3. 55 3.90 Palo Verde Inches. 3.87 Azusa Pasadena 11.44 Bear Valley dam 9.60 Chine Redlands 4 26 Claremont 3.51 Cleghorn Canyon 2 79 Corona 12 25 Devil Canyon 4.71 East Highlands San Dim as 11 29 Fillmore 8 88 Garvanza San Pedro 2.03 Highland Santa Monica 5 50 Hollywood Sierra Madre 15.56 Long Beach 16 29 Los Angeles Tustin 3 52 Mill Creek. Valyermo, post office Venice Ventura Walnut Whittier 5.57 Mount Lowe 5 16 Mount Wilson 10 21 Orange . t) 96 Palm Springs 5.02 142131°- -35 546 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. DAMAGE DUE TO FLOOD. The storm of February 18-21, 1914, coming when the ground was already thoroughly soaked, produced a flood in the vicinity of Los Angeles that caused the most damage, but was not the greatest in history. The loss by flood in Los Angeles County in 1914 has been estimated by the board of engineers for flood control at $10,000,000, exclusive of damage to the harbor, due to silting. DETERMINATION OF FLOOD FLOW. The flood left high-water marks which were still visible when the board of engineers for flood control was organized in April, 1914, and steps were taken immediately to obtain data from which the flood flow at various points could be computed. The appearance of the streams after this flood is shown by Plate XVII (p. 492). Under the direction of J. B. Lippincott, of the board of engineers for flood control, sections were selected and data and information collected for computing flood flow. The results obtained for sections on Los Angeles and San Gabriel rivers and tributaries are shown in the fol- lowing table: Estimated flood discharge of streams in vicinity of Los AngeU uary and February, 1914. Los Angeles River basin. Calif , from storms of Jan- Location of section. Drainage area. Value, of Discharge in second-feet. Square miles. Per cent moun- tainous. Stream. Flood. Per square mile. Los Angeles River Do 200 feet below bridge on Lanker- shim Boulevard. 200 feet below filtration galleries.. Below Main Street Bridge 304.3 334.8 534.1 30 118 6.5 22.3 21.9 30.5 38.6 42.7 49.5 72.6 72.4 68 100 100 60 100 0. 0375 .0375 .025 .05 .0375 .0275 .03 .03 .025 .04 .045 .025 16,780 24,420 31,140 5,400 13, ^00 4, 620 4,100 7,700 11,400 14, 136 7,610 5,880 55.2 73.2 Do 58.2 Pacoima Creek 1,000 feet below mouth of canyon. . Mouth of canyon 180 Big Tujunga Canyon Sunland Wash 115 Below road from Sunland up big Tujunga Canyon. Below bridge on road from San Fernando up Tujunga Valley. i mile below Verdugo Park About 300 feet below Devils Gate . . About 500 feet below the Colorado Street Bridge. North end of San Pasqual Avenue. Between Pasadena Avenue and Santa Fe Ry. bridge near Ave- nue 36. 712 Little Tujunga Canyon. . Verdugo Creek 184 352 Arroyo Seco 88.5 75.2 70.3 374 Do 366 Do 178 Do 119 FLOODS. 547 Estimated flood discharge of streams in vicinity of Los Angeles, Calif., from storms of January and February, 1914 — -Continued. San Gabriel River basin. Ivocation of section. Drainage area. Value of Discharge in second-feet. Stream. Square miles. Per cent moun- tainous. Flood. Per square mile. San Gabriel River Do . 2 miles above mouth of San Ga- briel Canyon. Below mouth of Rogers Canyon. . . Dunlap road crossing, | mile be- lov/ Whittier Boulevard Brid^'e. 300 feet above point where wash begins to spread, northeast of Monrovia. 500 feet above Foothill Boulevard below junction of little Anita Canyon. Mouth of canvon . . 220 226.68 100 100 0. 035 .035 .030 .05 .045 .035 .05 .05 .035 .025 25,260 26,680 16,000 4,070 3, 168 2,950 1,070 1,018 4,590 20, 9:50 115 117 Do Sawpit Canyon 7.37 18.17 18.58 7.56 3.34 12.5 100 100 too 100 100 82.4 550 Santa Anita Cnnyon San Dimas Canvon 174 159 Big Dalton Canyon Little Dalton Canyon . . . Mouth of canyon, opposite spill- way of Glendora water supply. 142 305 Eaton "Wash. .. ". Between Foothill Boulevard and Santa Fe Ry. bridge. About 500 feet beloAv Foster Bridge on Downey Boulevard. 367 ■Rio Hondo Ballona Creek basin. Ballona Creek.. About 500 feet below the wagon bridge on Higuera or Valley road. The following measurements have recently been furnished for pub- lication by F. C. Finkle, consulting engineer, Los Angeles, Calif.: Rio Hondo at El Monte. — A measurement was made with a cur- rent meter at bridge west of El Monte January 30, 1914, discharge 476 second-feet. There was no appreciable discharge in the channel of San Gabriel east of El Monte. Rio Hondo at WJiittier Boulevard bridge. — ^A measurement was made by floats on February 20, 1914. The channel was 630 feet wide ; area of cross section, 3,377 square feet; discharge, 19,959 second- feet. The stage was about 1.1 feet lower than at maximum stage. The slope at the crest of the flood was measured from 500 feet above to 500 feet below bridge, and found to be 2.39 feet. The section of channel was described as follows : Westerly 155 feet, the channel contained considerable small brush, which v/as not washed out, but bent over by its velocity, making the tops of much of it visible in the stream. The remaining 35 feet to the span bridge was sand and gravel bottom. This westerly portion of 190 feet altogether was a pile bridge. There were three 70-foot spans beyond this, through which the water moved very freely, but the bottom of the channel was rocky and irregular and some eddies were caused by the obstruction of the bridge piers. Beyond the span the banks had washed away and there was water 130 feet wide flowing on a sandy surface. The value of ''n" in Kutter's formula was selected as 0.04, giving a discharge of 26,806 second-feet for the crest of the flood. 648 SUEFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. The following results were obtained from slope measurements and cross sections taken March 17, 1914: Flood measurements. Stream. Area (square feet). Mean hydraulic radius (feet). Slope. '•n.-' Mean velocity (feet per second.) Discharge (second- feet). San Jose Creek near Old Workman Mill ranch . . 1,162 626 585 4.8 4.6 3.4 0. 00304 . 00202 . 003998 0.03 .03 .025 7.81 6.19 8. .50 9 073 3^875 4,970 San Dimas Creek northwest of Bassett. . Lytle Creek at Foothill Boulevard. Date. Time. Discharge (second- feet). Date. Time. Discharge (second- feet). Feb. 19, 1914 4, 711 1,088 743 812 Feb. 20, 1914 Feb. 21, 1914 Do 812 Do. 8.30 a. m 12.15 a. m 15,958 Do 5 p. m 6 45 a m 1 555 Feb 20 1914 10 30 a m Do 4.30 p. m 1,003 Lytle Creek at mouth of canyon. Feb. 1,1914... Feb. 10,1914.. Feb. 19,1914.. Do. Feb. 20, 1914.. 12 a. m 10 a. m 10.30 a.m. 5 p.m.... 118 53 977 771 14, 740 Feb. 20, 1914.. Do Feb. 23, 1914.. Feb. 28, 1914.. 5p. m 10.30 p.m.. 11.30 a.m.. 12 a. m 4,313 9,562 727 299 CAJON CREEK NEAR DEVORE, CALIF. A gaging station was maintained during February, 1914, on Cajon Creek at Glen Helen farm, about a mile above Devore. At this point the stream flows near the north side of the w^ash and against the steep bank. Gage heights were observed throughout the month and dis- charge measurements made by current meter or computed from slope and cross-section data. The discharge shown in the following table was averaged over periods between which there was no radical varia- tion in flow. Discharge of Cajon Creek near Devore, Cali/., for February, 1914. Second-feet. Feb. 1, midnight to Feb. 17, noon 46 Feb. 17, noon to Feb. 19, 10.30 a. m 411 Feb. 19, 10.30 a. m. to Feb. 20, midnight.... 700 Feb. 20, midnight to Feb. 20, 2.30 p. m 1,650 Feb. 20, 2.30 p. m. to Feb. 20, 7.00 p. m 3,500 Feb. 20, 7 p. m. to Feb. 20, 11 p. m 6, 330 Feb. 20, 11 p. m. to Feb. 21, 1.30 a. m 3,360 Feb. 21, 1.30 a. m. to Feb. 21, 5 a. m 6, 330 Feb. 21, 5 a. m. to Feb. 21, 7.30 a. m 3,500 Feb. 21, 7.30 a. m. to Feb. 22, noon 1, 423 Feb. 22, noon to Feb. 28, midnight 123 Mean daily discharge 332 Total run-off, in acre-feet. - 18, 400 FLOODS. 549 FLOOD OF 1891. The following records are abstracted from notes furnished by F. C. Finkle, consulting engineer, Los Angeles, Calif. All measurements were made and data collected by Mr. Finkle or by assistants under his direction. Lytle Creek at San Bernardino, Calif. — The maximum stage at foot of F Street occurred between 8 and 8.30 a. m., February 23. As the crest of the flood was passing stakes were set along the northeast bank to mark extreme high water. On February 24 the slope was measured over a distance of 530 feet and a cross-section taken. Channel condi- tions were explained as follows: '^ Channel irregular but deepest in middle, and banks slightly crooked; much willow growth, plenty of large stones mixed with coarse gravel and large quantities of drift carried by water during flood." The discharge was computed as follows: Area, 3,617 square feet ; mean hydraulic radius, 3.2 feet; total slope of water surface, 5.49 feet; '^n" in Kutter's formula selected as 0.04; coefficient C, 45.6; mean velocity, 8.3 feet per second; discharge, 30,020 second-feet. Santa Ana River at moutli of canyon, opposite Morton Creelc, near Mentone, Calif.— In the spring of 1892 the flood marks of February 23, 1891, were still distinct. The slope was measured over a distance of 1,000 feet and a cross-section taken. The condition of the channel was described as follows : Channel irregular deepest portion shifting from left toward right bank within section 1,000 feet in length; banks not straight but well marked by driftwood on large boulders and in some sycamores and alders at margin of flood channel. Channel filled with large boulders from 1 to 4 feet in diameter and smaller rocks with much gravel packed between them; a few irregular gravel bars at upper right-hand side and lower left-hand side of 1,000-foot section, but top of these bars 2 feet or more below high-water mark indicated by drift on both sides of section. The discharge was computed as follows: Area, 4,712 square feet; mean hydraulic radius, 6.44 feet; slope, 0.01102; '^n" in Kutter's formula, selected as 0.05; coefficient C, 42.78; mean velocity, 11.4 feet per second; discharge, 53,700 second-feet. Temescal Canyon ahove Cajalco Creelc at Harrington Narrows. — On May 7, 1891, the flood marks of February 23, 1891, were exammed for a distance of 620 feet, the slope was measured, and a cross-section was taken. Channel conditions were described as follows: Channel contained a great deal of growing timber in addition to being rocky and irregular. Only the small trees and brush were washed out and none of the large trees were destroyed, as they were standing at the time this survey was made. The discharge was computed as follows: xArea, 2,636 square feet; mean hydraulic radius, 6,937 feet; slope, 0.00824; ''n" in Kutter's formula selected as 0.05; coefficient C, 43.5; mean velocity, 10.4 feet per second; discharge, 27,420 second-feet. Elsinore Lake overflowed heavily on February 22 and 23, 1891, and there was still some discharge on May 7, 1891. 550 SURFACE WATER OF PACIFIC SLOPE, SOUTHERN CALIFORNIA. San Luis Bey River 1 mile above Bonsall. — ^A few weeks after the flood the slope was measured over a distance of 1,000 feet on both sides of the stream and a cross-section was taken with a hand level. The channel was wide and had a sandy, gravelly bed. Practically all vegetation had been washed out except on a few small bars which were covered with willows and near the edge of the stream where the grass and willows had been laid down by the flood but not washed out. The flow had not been regular and parallel to the banks of the stream, but showed evidence of many cross currents and eddies. The discharge was computed as follows: Area, 17,242 square feet; mean hydraulic radius, 7.2 feet; slope, 0.0028; '^n" in Kutter's formula was selected as 0.04; coefficient C, 52.3; mean velocity, 7.43 feet per second; discharge, 128,100 second-feet. The following observations were noted by Mr. Finkle. From the 17th and 18th of February to the 21st of February, inclusive, there was considerable rain in the valley with heavy snow in the mountains, extending from the Sa,n Gabriel River to the Mexican line. The snowfall was the hea^dest at three points, namely, in the area from San Antonio Peak to San Jacinto Peak, from the Santa Ana Mountains near Corona to the San Luis Rey River, including Palomar Mountain, and in the watershed tributary to the Tia Juana River near the Mexican bound- ary. I recall distinctly that when the warm rain on February 22 began the snow cover- ed the mountains near San Bernardino and Riverside down to the very foothills, reaching, in some places, as low in elevation as 1,200 feet above sea level. On February 27, 1891, the temperature seemed to change and the rain became much warmer so that the accumulated snow was suddenly melted and brought down the great flood, the peak of which culminated on the morning of the next day. In press clippings, which I have in my scrapbook, I find that the San Bernardino and River- side papers speak of snow down to the valley line on the morning of February 19, 1891. They also mention a rainfall of 4.53 inches in San Bernardino on February 21 and 22, and 17 inches of rainfall at Big Bear Valley in 24 hours on February 22. Other press clippings show the complete isolation of San Bernardino and Riverside from outside communication for a long time after this storm, and I personally recall that all railroad and highway bridges between Los Angeles and San Bernardino were out for at least two weeks. There was an extremely violent flood on the San Gabriel River, but I have no data from which to compute its volume. I recall, however, the first trip I made to Los Angeles, after communication by rail was restored, that the debris cone of the San Gabriel was completely littered with drift of all kinds, and that a large black bear, drowned and washed down in the flood, was lodged in a large amount of debris near the Santa Fe Railway crossing over the San Gabriel, and that the new channel of the river west of El Monte was cut to a width of a great many hundred feet in that storm, where it had only been about 75 feet before. At the Santa Fe and Southern Pacific crossings the San Gabriel had completely washed them out for a long distance across the country, requiring about two weeks to be replaced. The town of Azusa was entirely washed away and was reestablished in its present location after the flood. The flood of February 23, 1891, wag not as large in the Los Angeles River as the previous flood of December, 1889, but in every stream east of the Los Angeles River it was much larger. This is due to the fact that the flood of December, 1889, was from heavy rainfall coming suddenly, while the flood of February 23, 1891, was due to accumulated snow, melted by the warm rain, having much less precipitation than the storm of 1889. This heavy snowfall was mostly wanting on the watershed of the Los Angeles River, which explains why the flood was so much less severe than on other streams lying farther east. INDEX. A. Page. Absorption 360, 438, 475 Acknowledgments 11-13 Acre-foot, definition of 13 Agua Caliente Creek near Warner Springs, Calif .- 202-203 Aguilar Creek, Calif 539 Agncultural ditch, Calif 435 Agua Tibia Creek, Calif 232 Alder Creek (Santa Ana basin) 253 Alder Creek (Santa Clara basin) 496 Aliso Creek, Calif 471 Almond, Calif. , Temescal Creek near 151-153 Alpine, Calif., South Fork of Cuyamaca Wa- ter Co. 's flume near 110-112 South Fork of San Diego River near.. . 108-110 Alvarado Creek, Calif 115 Alvitrez ditch, Calif 356 Anaheim and Santa Ana canal, Calif 356 Anaheim and Fullerton canal, Calif 356 Arlington , Calif. , Santa Ana River near 350 Armas Creek, CaMf 539 Armitas Creek, Calif 539 Arroyo Burro, Calif 539 Arroyo Carnero, Calif 539 Arroyo diich, Calif 435 Arroyo Seco (Los Angeles basin), flood rec- ords of 546 miscellaneous measurements in 272-274 near Los Angeles, Calif. , after flood of 1914, plate showing 492 near Pasadena, Calif 457-464 concrete well, house, and control on, plate showing 423 Arroyo Seco ( Santa Margarita basin) 234 Artificial controls 15-17 Azusa, Calif., Duarte canal near 436 Fish Fork of San Gabriel River near... 402-403 Iron Fork of San Gabriel River near 403-404 Rogers Creek near 421-422 San Gabriel River above Fish Fork, near. 373 San Gabriel River at headworks, near . . 374-375 San Gabriel River near 375-402 San Gabriel Water Co. 's canal near 436 Southern California Edison Co.'s canal near 406-420 tunnel diversion near 420-421 Azusa canal near Azusa, Cahf 435 Azusa-Covina canal near Azusa, Calif 435 B. Baldwin ditch (Rio Hondo) 435-436 Baldwin division (Santa Anita Creek) 436 BaUona Creek, floo,d record of 547 Banta ditch, CaUf 436 Bernardo, Calif., San Dieguito River at and uear 140-146 Bear Creek, Calif. (Santa Ana basin) 352 Bear Creek, Calif. (San Gabriel basin) 434 Bear Valley ditch, CaUf 356 Bicknell, Calif. , San Timotes ditch at 357 Big Dalton Canyon, flood record of 547 Big Lake Creek near Warner Springs, Calif. . . 230 Big Tujimga Canyon, flood record of 546 Birch Oil Co.'s diversion, Calif 355 Black Canyon Creek near Mesa Grande, Calif 148-150 Bolen tunnel. See Redlands tunnel. Bonsall, Calif., Falbrook Creek at 232 San Luis Rey River at and near. . . 192-198, 550 Boulder Creek at mouth, near Lakeside, Calif 90-93 miscellaneous measurements of 1 15 near Julian, Calif 86-90 Brea Canyon Creek, Calif 355 Buena Vista Creek at Monkey Hill, Calif 230 C. Cable Canyon Creek, Calif 354 Cajon Creek, Calif 354 near Devore, Calif 548 California, stream flow in, investigations of. . . 10-11 Campo, CaUf., Cottonwood Creek near 43 Camulos ditch, Calif 497 Canada Agua Caliente at Warner Springs, Calif 230 Canada del Corral, Calif 539 Canada del Rodeo, Calif 355 Canada Lareo, Calif 539 Canada Refugio, Calif 539 Canada Verde, Calif 539 Canada Verde Creek near Warner Springs, CaUf 202 Capitan (El) Creek, CaUf 539 Carpinteria, CaUf., Gobernador Creek near. . 505-507 Carpinteria Creek, Calif 539 Carrizo Creek near Warner Springs, Calif. . . 209-212 Castaic Creek, CaUf 495 CastiUo ditch, Calif 356 Castle ditch, CaUf 355 Cate ditch, CaUf 436 Cattle Canyon Creek, CaUf 434 Chino Creek at Rincon, CaUf 348-349 Chocolate Creek, CaUf 115 City Creek, CaUf 352-353, 361 Clapp, WilUam B., work of 13 Claremont, CaUf., E vey Creek near 354 San Antonio Creek at diversion dam, near 342-343 San Antonio Creek near 327-331, 343 Southern California Edison Co.'s canal near 346-348 Cold Creek Canyon, CaUf 539 551 552 INDEX. Cold Spring Canyon Creek, Calif. , . . . 539 Coldwater Creek (San Gabriel basin), Calif. . 434 above mouth, Calif 404 Coldwater Creek (Santa Ana basin) 327 Coldwater Creek (Santa Clara basin) 496 Colton, Calif., measurements in San Bernar- dino Valley above 3'o 1-371 Conservation Commission, members of 12 Control, definition of 14 Controls, concrete, plates showing 16, 17 Cook Creek near La Crescenta, Calif 472 Cooperation 11-13 Cottonwood Creek at Marron Valley, Calif. . , 43 at Morena reservoir, Calif 43 ■ near Campo, Calif 43 near Cottonwood, Calif 43 near Dulzura, Caiif 24-36 gaging station on, plate showing 493 Coyote Creek, Calif 504 Cuca Creek, Calif 231 Cucamonga Creek, Calif 349, 3.54 Current meters, Price, plate showing 14 Cuyamaca Water Co., aid by 12 Cuyamaca Water Co.'s flume at diverting dam, near Lakeside, Calif 93-99 at diverting dam, near Lakeside, Calif., gaging station on, plate showing. 60 at Los Coches Creek, near Lakeside, Calif., gaging station on, plate showing. 60 miscellaneous measurements in 115 near Lakeside, Calif. 99-108 South Fork of, near Alpine, Calif 110-112 Crafton canal, Calif., MiU Creek in canyon, at headworks of 280-285 D. Dalton Creek, Calif 434,439 Data, accuracy of 17-18 explanation of 14 Definition of terms 13-14 Dehesa, Calif., Sweetwater River at and near. 54-58 Del Mar, Calif., San Dieguito River near. . 146-148 Santa Fe ranch ditch near 165 Descanso, Calif., Ellis flume near 58 Sweetwater River near 44-54 Devil Canyon Creek, miscellaneous measure- ments in 354 near San Bernardino, Calif 302-304 Devore, Cahf., Cajon Creek near 548 Dinsmore Creek, Calif 539 Discharge, conversion of 18-19 Dos Pueblos Creek, Calif 539 Duarte, Calif., Fish Creek near 425-427 Duarte canal near Azusa, Calif. 436 Dulztu-a, Calif., Cottonwood Creek near 24-36 Pine Valley Creek near 36-38 Dulzura conduit at Barrett dam site, Calif., plate showing 493 near Dulzura, Calif 39-43 Durfee ditch, Calif 436 Durkee ditch, Calif 355, 356 E. East San Pasqual ditch, miscellaneous meas- urements in 165 near Eseondido, Calif 153-154 East Twin Creek. See Strawberry Creek. Page. Eaton Canyon Creek ( Los Angeles basin) . . . 474-475 Eaton Canyon Creek ( San Gabriel basin) 439 Eaton Creek near Pasadena, Calif 464-465 near Pasadena, Calif., double concrete- boulder control on, plate show- ing 423 Eaten Wash, flood record of 547 EUis flume near Descanso, Calif 58 El Monte, Calif., KiUon's pumping plant near 436 Rio Hondo at 547 Elsinore, CaUf., San Jacinto River near 318-321 Temsecal Creek near 324-326 Temescal Water Co.'s canal near 334 Elsinore I -ake at Elsinore, Calif 321-323 Equivalents, convenient 18-20 Eseondido, Calif., East San Pasqual ditch near 153-154 Guejito Creek near 155-156 Santa Ysabel Creek near 133rl40 West San Pasqual ditch near 157-159 Eseondido Creek basin 165 Eseondido Mutual Water Co.'s canal, miscel- laneous measurements in ... 231 near Nellie, Calif 215-225 E speranza, Calif. , Piru Creek at 495 Pirn Land & Water Co.'s upper diversion • • near 497 Yorba ditch at 357 Evans ditch near Temescal, Calif. 356 Evans lower ditch, Calif 366 Evans upper ditch, Calif 3.56 Evey Creek near Claremont, Calif 354 Explanation of data 14-15 F. Fallbrook Creek at B onsall, Calif. 232 Farmer's ditch at Santa Paula, Calif 497 FiUmore, Cahf., Santa Clara River at 483-484 Fillmore Irrigation Co.'s ditch, Calif 497 FUlmore Land & Water Co.'s canal. 497 Fish Creek near Duarte, Calif 425-427 near Duarte, Calif., concrete well and house for water-stage recorder on, plate showing 422 Floods, records of 543-550 Forest Home, Calif., Mill Creek at 285-29-1 Forest Service, United States, aid by 12 Foster, Calif., San Vicente Creek at. . . . 113-114, 115 Frey Creek, Calif 232 Friez water-stage recorder, plate showing 15 Fuller ditch, Calif 35.5, 356 G. Gaging station, typical, plate showing 14 Gaging stations, conditions at 15-17 list of. 20-22 Gato Creek, Cahf 511-512 Gaviota Creek, West Fork of 539 GiUiland ditch, Calif. 3-55,366 Gobernador Creek, miscellaneous measure- ments in 539 near Carpinteria, Calif 505-507 Goleta, Calif., San Jose Creek near 509-510 Gopher Creek, Cahf ". 232 Gorman Creek, Calif . 496 Greenspot pipe line near Mentone, Calif... 273-280 Grees ditch at Santa Paula, Calif 497 INDEX. 553 Grossmont, Calif., La Mesa ditch near 113 Gnmsky,C. E., work of 12 Guejito Creek near Escondido, Calif 155-156 Gurley printing water-stage recorder, plate showing 15 H. " H " ditch near Riverside Narrows, Calif 356 Haines Creek near Tujunga, Calif 455-457 near Tujunga, Calif., concrete well, house, and control on, plate showing 450 Hall, William Ham., and assistants, work of. . 12 Harrington Narrows, Calif., Temescal Canyon at 549 Highland canal at intake weir near Mentone, Calif 295-296 Hot Springs Creek, Calif 496 I. Indian Affairs Office, aid of 12 J. "J " ditch near Riverside Narrows, Calif 356 Jamacho Canyon, Calif., Sweetwater River at 58 Jennie McGee Creek at Pala, Calif 232 Julian, Calif., Boulder Creek near 86-90 Jurupa canal, Calif 356 K. Keller Creek, Calif 352 Killon's pumping plant near El Monte, CaUf . 436 L. La Crescenta, Calif., Cook Creek near 472 I^ Crosse, Calif., San Antonio Creek at 504 La Jolla, Calif., East Fork of Potrero Creek near 230 Potrero Creek near. 230, 231 W est Fork of Potrero Creek near 231 La Jolla Creek, Calif 230 Lake Hodges dam, San Dieguito River, plate showing 44 Lakeside, Calif., Boulder Creek at mouth, near 90-93 Cuyamaca Water Co.'s flume at diverting dam, near 93-99 Cuyamaca Water Co.'s flume, near 99-108 San Diego River at 65-78 San Diego River at diverting dam, near. . 59-64 La Mesa ditch near Grossmont, CaUf 115 near La Mesa, Calif 115 Libby ditch near San Luis Rey, Calif. 232 Lippincott, Joseph B ., and assistants, work of 12 Little Dalton Canyon, flood record of 547 Little Dalton Creek, Calif 434 Little Lake, Calif 436 Little Santa Anita Creek, miscellaneous measurements in 475 near Sierra Madre, Calif 468-470 concrete well and house for water- stage recorder on, plate showing.. 422 Little Sespe Creek, Cahf 496 Little Temecula Creek, CaUf 232 Little Tujunga Canyon, flood record of 546 Little Tujunga Creek, Calif 472, 476 Liveoak Creek, Calif 435 Loma Abajo River, Calif 511 Lordsburg Mesa, Calif., measurements in San Gabriel Valley...... 438 Page. Los Angeles River above Los Angeles, Calif. . 440 at the narrows, Calif .'.' 440 diversions from 448-449 flood records of 546 miscellaneous measurements of 471 Los Angeles River basin, general features of. . 439 Lusardis Creek ; 230 Lytle Creek at mouth of canyon near Rialto, CaUf 304-309 at San Bernardino, CaUf 549 flood measm-ements of 548 miscellaneous measurements in 354, 361 near San Bernardino, CaUf 309, 318 M. McGee Creek, CaUf 232 McGlashan, H. D., work of 13 Maclay Creek, CaUf 472 Main Supply ditch plus Crystal Springs, CaUf . 472 MaUbu Creek basin, gaging-station record in 476-482 general features of 476 MaUbu Creek near Calabasas, CaUf 476-479 Maps of parts of southern CaUfornia, showing location of gaging stations. . .In pocket. Maria Ygnacio Creek, CaUf 539 Marion Creek, CaUf 232 West Fork of 232 Marron Valley, CaUf., Cottonwood Creek at. . 43 Matagual Creek near Warner Springs, CaUf. 206-209 Matilija Creek, CaUf 504 North Fork of 504 Mayberry Canyon, CaUf 436 Mentone, CaUf., Highland canal at intake weir near 295-296 Redlands canal near 297-298 Santa Ana River near 236-261, 549 Southern California Edison Co.'s canal and Greenspot pipe Une near. . 262-280 Mesa Grande, CaUf., Black Canyon Creek near 148-150 San Luis Rey River at Warner dam site, near 170 San Luis Rey River near 171-178 Santa Ysabel Creek near ". 118-124 Mill Creek at Forest Home, CaUf 285-294 in canyon, at headworks of Craf ton canal, CaUf 280-285 misceUaneous measm-ements in .... 352,361 Millard Canyon Creek, CaUf 474 Miner's inch, definition of 13 equivalents of 19-20 Mission Creek, CaUf. 539 Mission tunnel near Santa Barbara, CaUf. ... 508 Monkey Hill, Calif., Buena Vista Creek at . . . 230 Mono Creek near Santa Barbara, CaUf 536-538 Monrovia, CaUf., Sawpit Creek near 427-130 Monrovia pipe line near Monrovia, CaUf. . . 430-432 Monserate Creek near Pala, CaUf 232 Moosa Creek, CaUf : . . 232 Morena ditch at Pala, CaUf 232 Morena reservoir , Calif., Cottonwood Creek at. 43 Morton Creek, Calif 352 Murray dam, at La Mesa reservoir, upstream and downstream sides, plates showing 45 Murrieta Creek, CaUf...... 234 554 INDEX. N. Page. Nellie, CaUf., Escondido Mutual Water Co.'s canal near 215-225 San Luis Key River near 180-182, 229 Nestor, Calif., Tia Juana River near 23-24 Newberry ditch, Calif 355-356 Newell, F. H., and assistants, work of 12 NewhaU ditch, Calif 497 Newton ditch, Calif 355 Nigger Canyon Creek, Calif 231 NordhoflE, Calif., Ojai Creek at 504 San Antonio Creek at 504 Ventura River near 498-500 O. Oceanside, Calif., San Luis Rey River at . . 201, 230 San Luis Rey River near 199-200 Ojai Creek at Nordhoff, Calif 504 Olive, Calif., Santa Ana Irrigation Co.'s canalnear 357 Santa Ana River at 350 P. Pacific Light & Power Corporation's tailrace (Sierra plant) 354 Pacoima Creek, flood record of — 546 miscellaneous measurements in 471-472, 476 near San Fernando, Calif 449-452 near San Fernando, Calif., concrete well, house, and control on, plate show- ing 450 Padero Creek, Calif 539 Pala, Calif., Jennie McGee Creek at 232 Morena ditch at 232 Pala Indian Reservation canal at 226-228 Pauma Creek near 231 San Luis Rey River at 191-192, 229-230 San Luis Rey River near 182-191, 229 Sicklers ditch near 232 Pala Indian Reservation canal at Pala, Calif 226-228 Paradise Creek, Calif 231 Pasadena, Calif., Arroyo Seco near 457-464 Eaton Creek near 464-465 Pauma Creek, miscellaneous measiuements in 231-232 near Pala, Calif 231 Pauma ranch ditch, Calif 232 Pine Creek, Calif 496 Pine Valley Creek near Dulzura, Calif 36-38 Piru, Calif., Sabin canal at 497 Piru Creek, miscellaneous measurements in. . 495 near Piru, Calif 484-486, 495 Piru Land & Water Co.'s lower diversion 497 upper diversion near Esperanza, Calif 497 Plunge Creek, Calif 352,361 Potrero Creek, East Fork of, near La Jolla, Calif.. 230,231 near La Jolla, Calif 230 West Fork of, near La Jolla, Calif 231 Price current meters, plate showing 14 Puente ditch, Calif 436 Ramona, Calif., Santa Maria Creek -near... 159-164 Santa Ysabel Creek near 125-133 Page. Rating tables, use of. 14 Records, computed, accuracy of 17-18 Red Hill, Calif. , measurements at 358-359 Redlands canal, miscellaneous measure- ments of 352 near Mentone, Calif 297-298 Redlands timnel, Calif 360 Rialto, Calif., Lytle Creek at mouth of canyon near 304-309 Richardson ditch at Santa Paula, Calif 497 Rio Hondo at El Monte, Calif 547 at Whittier Boulevard bridge, Calif 547 flood record of 547 miscellan eous measurements in 474 Rincon, Calif., Chino Creek at 348-349 Santa Ana River at 351 Santa Ana River near 350 San Luis Rey River at 229 Temescal Creek near 326-327 Rincon Creek, Calif 539 Rincon ditch, Calif. 436 Rincon Indian Reservation ditch near Valley Center, Calif 226 Riverside Narrows, Calif. , " H " ditch near . . 356 " J " ditch near 356 Santa Ana River at 350 Riverside Water Co 's lower canal, Calif 356 Riverside Water Co.'s upper canal, Calif. . . . . 356 Roberts ditch, Calif 355,356 Rodriguez ditch, Calif 436 Rogers Creek near Azusa, Calif 421-422 near Azusa, Calif., v/ells and houses for water-stage recorders on, plates showing 236, 422 Roubidoux ditch, Calif 357 Run-off (depth in inches), definition of 13 S. Sabin canalat Piru, Calif 497 San Antonio Creek at diversion dam, near Claremont, Calif 342-343 at division box, Calif 345 at La Crosse, Calif 504 at Nordhoff, Calif 504 miscellaneous measmements in 343-345 near Claremont, Calif 327-331, 343 near Upland, Calif 331-341 San Antonio tunnel at the portal, Calif 346 San Bernardino, Calif., Devil Canyon Creek near 302-304 Lytle Creek at 549 Lytle Creek near 309-318 Waterman Canyon Creek near 299-301 San Bernardino Valley, measurements in, above Colton, Calif 361-371 San Diego River at diverting dam, near Lakeside, Calif 59-64 at diverting dam near Lakeside, CaUf, gaging station on, plate showing . 60 at Lakeside, Calif 65-78 at Mission dam, near Santee, Calif., after flood of 1916, plate showing. . 493 at San Diego, Calif 83-86 miscellaneous measurements in 114 near Santee, Calif 7^83 South Fork of 115 South Fork of, near Alpine, Calif lOS-110 INDEX. 555 San Diego River basin, gaging-station records in 58-115 general features of 58-59 San Dieguito River at Bernardo, Calif 140-143 Lake Hodges dam on, plate showing 44 near Bernardo, Calif 143-146 near Del Mar, Calif 146-148 San Dieguito River basin, gaging-station records in 116-165 general features of 116 San Dimas Canyon, flood record of 547 San Dimas Creek, flood measmrement of .... . 548 miscellaneous measurements in 434, 439 near San Dimas, Calif 422-425 concrete well and house for water- stage recorder on, plate showing 237 San Dimas Wash, Calif., measurements in.. 437 San Elijo dam site near San Marcos, Calif 165 San Fernando, Calif., Pacoima Creek near. . 449-452 San Francisquito Creek, Calif 495 San Gabriel River above Fish Fork, near Azusa, Calif 373 at headworks near Azusa, Calif 374-375 Fish Fork of, near Azusa, Calif 402-403 flood records of 547 Iron Fork of, at mouth 434 near Azusa, Calif. 403-404 miscellaneous measurements of 433,439 near Azusa, Calif 375-402 concrete wells and houses for water- stage recorders on, plates showing 237 wading measurement on, plate showing. 17 North Fork of West Fork of 434 North Fork of, West and North branches of, at Weir, Calif 405-406 West Fork of, CaUf 405,434 San Gabriel River basin, gaging-station records in 373-439 general features of 371-373 San Gabriel Valley, measurements in, on Lordsburg Mesa, Calif 43S miscellaneous measurements in 437 San Gabriel Water Co.'s canal near Azusa, Calif 436 San Jacinto River near Elsinore, Calif 318-321 San Jose Creek, flood measurement of 548 miscellaneous measurements in 435, 539 near Goleta, Calif 509-510 San Juan Capistrano, Calif., Trabuco Creek near 234 San Luis Rey, Calif., Libby ditch near 232 San Luis Rey ditch near 228 San Luis Rey ditch, miscellaneous measure- ments in , 232 near San Luis Rey, Calif 228 San Luis Rey River at Bonsall, Calif. . . 192-196, 550 at diversion flume, Calif 178-180 at Oceanside, Calif 201,230 at Pala, Calif 191-192, 229-230 at Rincon, Calif 229 at Warner dam site, near Mesa Grande, Calif 170 miscellaneous measurements of 229-230 near Bonsall, Calif 196-198 near Mesa Grande, Calif. 171-178 San Luis Rey River near Nellie, Calif.. 180-182,229 near Oceanside, Calif 199-200 near Pala, Calif 182-191,229 concrete control on, plate showing.. 16 near VaUey Center, Calif 229 near Warner Springs, Calif 166-170 West Fork of, near Warner Springs, CaUf 203-206 San Luis Rey River basin, gaging-station records in 166-232 general featin-es of 165-166 San Marcos, Calif., San EUjo dam site near. . 165 San Pedro Creek, Calif 539 San Roqui Creek, miscellaneous measure- ments in 539 near Santa Barbara, Calif 508 San Timoteo Creek, Calif 352 San Timoteo ditch at Bicknell, Calif 357 San Vicente Creek at Foster, Calif 113-114, 115 San Ysidro Creek, Calif 540 Sand and gravel 360, 438, 475 Santa Ana Irrigation Co.'s canal at Yorba, CaUf 357 near OUve, Calif 357 Santa Ana River at Ohve, Calif 350 at Rincon, Calif 351 at Riverside Narrows, Calif 350 at Yorba, Calif 350 miscellaneous measurements of — 350,355,361 near Arlington, Calif 350 near Mentone, Calif 236-261, 549 gaging station on, plate showing 61 well and house for water-stage re- corder on, plate showing 236 near Rincon, Calif 350 Santa Ana River basin, gaging-station records in 236-371 general features of 235-236 miscellaneous low-water measurements in 357 Santa Anita Canyon, Calif., flood record of. . . 547 Santa Anita Creek, Calif., miscellaneous measurements in 439,475 near Sierra Madre, CaUf 466-468 well and house for water-stage re- corder on, plate showing 236 Santa Barbara, CaUf., Mission tunnel near. . 508 Mono Creek near 536-538 San Roqui Creek near 508 Santa Ynez River near 513-526 Santa Barbara County, CaUf., stream flow in 505,540 Santa Clara River at FiUmore, Calif 483-484 misceUaneous measurements in 495 Santa Clara River basin, gaging-station records in 483-497 general features of 482-483 Santa Clara Water & Irrigation Co.'s canal. . 497 Santa Fe ranch ditch near Del Mar, Calif 165 Santa Margarita River basin, gaging-station records in 233-234 general features of 233 Santa Maria Creek near Ramona, Calif 159-164 near Ramona, CaUf., gaging station on, plate showing 61 556 INDEX. Page. Santa Maria River at Santa Maria, Calif 542 near Santa Maria, Calif 541-542 Santa Maria River basin, gaging-station records in. 541-542 general features of 540 Santa Monica Creek, Calif 540 Santa Paula, Calif., Farmer's ditch at 497 Grees ditch at 497 Richardson ditch at 497 Sisar Creek near 496 Santa Paula Creek at Santa Paula, Calif 496 near Santa Paula, CaUf 492-494, 496 after flood of 1914, plate showing. 492 Santa Paula Water Co.'s ditch 497 Santa Ynez River near Lompoc, Calif 527-535 near Santa Barbara, Calif . 513, 526 cable section on, plate showing 451 foundation for Gibraltar dam on, plate showing 451 Santa Ynez River basin, gaging-station records in 512-513 general features of 512-513 Santa Ysabel Creek near Escondido, CaUf . 133-140 near Mesa Grande, Calif 118-124 control of concrete and solid rock on, plate showing 17 near Ramona, Calif 125-1 33 concrete control on, plate showing . . . 16 near Santa Ysabel, Calif 116-118, 165 Santee, Calif., San Diego River near 79-83 Sawpit Canyon, flood record of 547 Sawpit Creek, miscellaneous measurements in 435 near Monrovia, Calif 427-430 concrete well and shelter on, plate showing 423 Second-feet, definition of 13 Second-feet per square mile, definition of 13 Sespe Creek at Sespe, Cahf 490-492 miscellaneous measurements in 496 ]iear Sespe, Calif 487-490 West Fork of 496 Sespe Laiid & Water Co.'s canal, Cahf 497 Seecher ditch, Calif 357 Sheep Creek, Calif 435 Sheldon flume, Calif 505 Sicklers ditch near Pala, Calif 232 Sierra Madre, Calif., Little Santa Anita Crek near 468-470 Santa Anita Creek near 466-468 Sisar Creek, CaUf 496 Sisquoc River at Sisquoc ranch, Calif 542 Slauson well, Calif 436 South Fork flume, Calif 115 Southern CaUfornia Edison Co.'s canal, Calif 352, 354, 436 near Azusa, Calif 406-420 near Claremont, Calif 346-348 and Greenspot pipe line near Mentone, Cahf 262-280 Sparkman Creek, East Fork of 231 Middle Fork of 231 West Fork of 231 Page. Spring Brook, Cahf 354 Stage-discharge relation, definition of 14 Standiferd ditch, Cahf 436 State Water Commission, members of 12 Stevens continuous water-stage recorder, plate showing 15 Strawberry Creek, Cahf 353; 361 Stream flow in Cahfornia, investigations of. . 10-11 Sunland, Calif., Tujunga Creek near 452-454 Sunland Wash, flood record of ^ 546 Susanna Creek near Warner Springs, Cahf . 212^215 Sweetwater dam, September 17, 1918, plate showing 44 Sweetwater River at Dehesa* Cahf 58 at Jamacho Canyon , Calif 58 at Sweetwater dam, Cahf : . 58 at Sweetwater reservoir, Cahf • 57 near Dehesa, Cahf 54-57 concrete control on, plate showing . . . 16 near Descanso, Cahf , :44-54 concrete control on, plate showing.,.: ■ ■ 17 near Sweetwater dam, Calif 58 Sweetwater River basin, gaging-station rec- ords in : 4'4-58 general features of. 44 Sweetwater Water Co., aid by 12 T. Tar Creek, Cahf 496 Tecolote Creek, Calif „ 540 Temecula Creek, miscellaneous measurethen'ts of 234 near Temecula, Cahf 233-234 Temescal, Cahf., Evans ditch near 356 Temescal Canyon at Harrington Narrows, Calif 549 Temescal Creek near Almond, Calif 151-153 near Elsinore, Cahf 324-326 near Rincon, Cahf 326-327 Temescal Water Co.'s canal near Elsinore, Cahf 354 Temple ditch, Calif 436 Terms, definition of 13-14 Thompson Creek, Cahf 435 Tia Juana River at mouth 43 at Tia Juana, Mexico 43 near Nestor, Calif 23-24 Tia Juana River basin, gaging-station records in ., 23-43 general features of 22-23 Toro Canyon, Cahf 540 Townsend ditch, Calif 357 Trabuco Creek near San Juan Capistrano, Cahf 234 Triunfo Creek near Caiabasas, Calif 480-482 Trujillo ditch, Calif 357 Tujunga, Calif., Haines Creek near 455-457 Tujunga Creek, Cahf 472, 476 near Sunland, Cahf 452-454 near Sunland, Cahf., concrete well, house, and control on, plate shov/ing. . . 450 Tunnel diversion near Azusa, Cahf., plate showing 61 INDEX. . 557 17. Page. Upland, Calif., San Antonio Creek near — 331-341 V. Valley Center, Calif., Rincon Indian Reserva- tion ditch near 226 San Luis Rey River near 229 Velocity in feet per second, table for convert- ing, into velocity in miles per hour 19 Ventura Light & Power Co.'s canal 505 Ventura River, miscellaneous measurements in 504 near Ventura, CaUf 501-503 after flood of 1914, plate showing 492 North Fork of 504 near Nordhoff, Calif 498-500 Ventura River basin, gaging-staticn records in 498-505 general features of 498 Verdugo Creek, flood record of 546 Volcan Land & Water Co., aid by 12 W. Walnut Creek, flood measurement of 548 Warner Springs, Cahf., Agua Cahente Creek near 202-203 Big Lake Creek near 230 Canada Agua Caliente at 230 Canada Verde Creek near 202 Carrizo Creek near 209-212 Matagual Creek near 206-209 Warner Springs, Calif., San Luis Rey River near 166-170 Susanna Creek near 212-215 West Fork of San Luis Rey River near. 203-206 Waterman Canyon Creek, Calif 353-354, 361 near San Bernardino, Calif 299-301 plate showing gravel and sand de- posited by first high water after forest fire 451 Water-stage recorders 17 plate showing 15 well and house for, plate showing 236 Weather Bureau, United States, aid by 12 West Potrero ditch, Cahf 231 West San Pasqual ditch, Cahf 165 near Escondido, Cahf 157-159 West Twin Creek. See Waterman Canyon Creek. Whittier Boulevard bridge, Cahf., Rio Hondo at 547 Whittier ditch, Cahf 436 Wilbur ditch, Cahf 355,357 Y. Yorba, Calif., Santa Ana Irrigation Co.'s canal at 357 Santa Ana River at 350 Yorba ditch at Esperanza, Cahf 357 " Z. Zero flow, point of, definition of 14 ADDITIONAL COPIES OF THIS PUBLICATION MAY BE PROCUEED FROM THE SUPERINTENDENT OF DOCUMENTS GOVERNMENT PRINTING OFFICE WASHINGTON, D. C. AT 65 CENTS PER COPY A M WAT] R. 2 E. 45' R. 3 E. MAP OF A PART OF '' I SOUTHERN CALIFOENIA SHOWING GAGING STATIONS PART B O o Gaging'.tation * 1 |i^=:^'£^""""' I i:E"HEE.fE:«„ >?^ ii S:ES^'"""""" V '"-■.: V ^ ii=~::: '^'" ';,=^,,::,^f -- - a w. s. „.. d« „ , i . • '■ • [ r I 1 .; .... '' 1 V ■■■"'■ ' " .X . .'. ■ K :;„ i: - 1 ^ 1 ■ '" :^ 1 • - ■?•. '^ ^ ^^^ r 4 J, . < '' * -' A' ,, ■ ; ■- ■1" V, 1 MAP OF A PART OF SOUTHEKN CVLIFORM V. ^riOWING GAGING STATIONS (PART A) ,C3M 019 953 861 5