The Sewerage of Geneva, N. Y \ J, JAMES R. CROES, Civil Engineer, No. 63 Bleecker Street, New York, » t u r I The Sewerage of Geneva, N. Y. REPORTS TO THE Board of Trustees of the Village GENEVA, N. Y. • i » 7 THE COMMITTEE OF CITIZENS AND J. JAMES R. CROES, M. Am. Soc. C.E. JANUARY ist, 1884. New York: The Sanitary Engineer Press 140 William Street. r 1 : / f~f uit 01 \ I » The Sewerage of Geneva, N. Y. i & ■9— ST UT o To the Honorable the Board of Trustees of the Village of Geneva : At the Tax Meeting held May 15, 1883, the following resolution, offered by A. L. Chew, Esq., was adopted : *Whereas, It is desirable in providing sewerage for the Village of Geneva, that for efficiency and economy in construction it be done in conformity to intelligently devised plans and specifications ; therefore, Resolved , That it be referred to a committee of five citizens, tax-payers of the village, to consist of F. O. Mason, Hamilton L. Smith, S. H. Parker, Peter Rich¬ ards and P. N. Nicholas, to devise such plans and specifications, and report the same for approval to the Board of Trustees of the village ; and such committee is empowered to employ a competent sanitary engineer and a competent aid and draughtsman for the purpose ; and that they be also authorized, in case want of power in the Village Charter be found to exist, to apply to the next Legislature for such further grant of power as will enable the Trustees, or any body appointed therefor, to construct from time to time such sewers as may be deemed important to the public health and convenience, and to regulate the connection of private drains therewith ; the expense of carrying this resolution into effect not to exceed five hundred dollars. In accordance with the foregoing resolution, the undersigned, members of said Committee, respectfully report : That they employed the services of Mr. J. J. R. Croes, Civil Engineer, of the city of New York, in whose skill and knowledge of matters relating to sewerage they had reason to feel confidence, and whose report to the Trustees is herewith presented. The Committee also employed Mr. Geo. Root, of Geneva, to take the elevations required by Mr. Croes, who has expressed his approval of this portion of the work. The map used in this survey was an old village map, the accu¬ racy of which Mr. Root does not vouch for, but the data furnished are doubtless sufficiently accurate to justify the estimates in the report. In submitting the report of Mr. Croes and the accompanying map, the Committee feel that their confidence has not been mis¬ placed ; and that whatever action may be taken in the matter the village will be in possession of a valuable acquisition to the public records. n 4 THE SEWERAGE OF GENEVA, N. Y. They respectfully suggest that the report be carefully preserved, and that the map be framed and hung in some safe place where it will be accessible for reference. Mr. Croes’ estimates of cost for the sewerage of the entire vil¬ lage are very large, and the Committee fully realize that it would be entirely impracticable to entertain any such outlay at present. Indeed, the report does not contemplate such an expenditure at any one time, and suggests that of the ten districts for which specifications are given, three only will probably require immediate attention. The first includes the part of the village from Main Street to the Lake between Hamilton and Lewis Streets. The second, between Main and Pulteney from Hamilton to Lewis Streets. The third, between Hamilton Street and Mile Point. The estimates for these three districts aggregate about $52,000 for 37,000 feet of sewers. This, even, is a very large sum, in view of the limited resources and present liabilities of the village, though as an important proportion of the cost would doubtless be assessed upon the frontage along which the sewers are laid, the genet'al tax would not be so largely increased as might at first appear. Of these districts the first and second are already partially, although, as the Committee believe, very imperfectly, provided for by the Cemetery Creek sewer, and though this by no means conforms to the plan recommended in this report, as it has been so recently con¬ structed at large cost, it will reasonably be expected that ample time should be given to test its efficiency. Mr. Croes’ opinion, however, that natural water-courses should in no case be used for the conveyance of sewage, seems to be sup¬ ported by the best sanitary authorities. To cover the channel so used is simply to hide the evil, not to remedy it. The third district named in the report, though last in order, is perhaps at this time the first in importance. No one familiar with this section would question (apart from any considerations of comfort or convenience) that it cannot be left in its present condition without peril to the public health. Indeed, the Board of Health have, within a few months, notified all residents draining to the open ditch between Pulteney and Main Streets, to cut off their connections, “ as its use for sewerage purposes has been declared a nuisance detrimental to the public health ”—an order which cannot properly be enforced in the absence of any other provision for this drainage. The report suggests three methods for the sewerage of this THE SEWERAGE OF GENEVA, N. Y. 5 district, and estimates the cost, including the preparation of the land for irrigation, at about $17,000. But as the east side of Main Street has the advantage of drain¬ ing to the Lake, it could perhaps be safely left for the present, and a sewer simply laid through Pulteney Street to the Mile Point ravine, taking the entire drainage of the village flowing south. Mr. Croes approves of this suggestion, and submits a supplemen¬ tary plan in conformity therewith. His estimate for the work, exclu¬ sive of irrigation, is $5,760 ; and the Committee feel authorized to state that his estimates throughout are intended to be over rather than under the probable cost. As a large amount of bonds issued for cemetery and railroad pur¬ poses will be paid off within the next two years, it may reasonably be hoped that this section of this district at least could be prudently undertaken. In the opinion of the Committee there is an imperative neces¬ sity for this sewer, and its construction cannot safely be delayed. In regard to the other two districts (Nos. 1 and 2) named in the report as requiring immediate attention : aside from the question of relative importance and the partial relief afforded by the Cemetery Creek sewer, they probably could not be so well treated separately, and would in any case involve a much larger expenditure, the estimate for No. 1 being about $19,000, and for No. 2 $16,000. The Committee, however, would not be understood as underrating the importance of these districts ; they would prefer that the entire plan should be acted upon at once ; but inasmuch as that is not prac¬ ticable, they would make this beginning in the third district, where immediate relief is needed and would be attended with so moderate an outlay, rather than wait indefinitely to do more ; and they would respectfully submit this recommendation to the impartial consideration of the Trustees and tax-payers of the village. For the disposal of the sewage of district No. 3, the report recommends sub-surface irrigation at Mile Point, for which the land would seem admirably adapted. This method has been adopted with apparent success in many European cities and in several places in our own country, and appears to be steadily growing in favor. Certainly the advantage of protect¬ ing the Lake to this extent from further pollution alone entitles the plan to favorable consideration. Mr. Croes’ estimate of the cost of preparing the land for this purpose is $3,000. And in this connection the Committee would call attention to the suggestion in the report, that for the sewage flowing north, if it must be discharged into the Lake, only one outlet should be 6 THE SEWERAGE OF GENEVA, N. Y. provided, and that this should be located “ where the slight current of the Lake will carry it away from the town and not allow it to remain stagnant within the breakwater.” The Committee entirely coincide with the opinion expressed in the report, that whatever is undertaken, whether in whole or in part, to carry out this or any other plan for the sewerage of the village, should be under the direction of a competent engineer ; and the esti¬ mates given in the report are intended to cover the expense of such supervision. They would also urge the importance of interdicting private connections with the mains, except by official permit and prescribed methods. The report provides for the use of automatic flush tanks for cleansing the sewers, and Mr. Croes estimates that 5,000 gallons a day, were the entire system in operation, would be ample for this purpose. Very little water seems requisite under this “ separate sys¬ tem and in the town of Nahant, Massachusetts, where it has been adopted, and which has no public water supply, the pipes are flushed through the manholes with salt water supplied by the town water cart; and Mr. Bowditch, sanitary engineer, reports that this primitive method has been thus far so successful and has so seldom to be applied that it is quite possible the special flush tanks may be omitted entirely. The ordinary house supply is thought sufficient for private drains, and it will be noticed that the report deprecates even the discharge of rain water from the roof into the sewers, except under rigid restrictions. But whatever may be thought of the public water supply with reference to sewerage, the two systems are so intimately related that the Committee would submit whether they should not be under one ownership and control. It would seem that the White Springs should be a source of profit rather than a burden to the village, and that a negotiation from year to year with a private company for the amount of water required for public uses should not be necessary. The resolution referred to authorizes the Committee to apply to the Legislature for such grant of power as may be necessary to give effect to their recommendations if adopted. There has been no oppor¬ tunity for action in this matter, and it is still held under consideration. Respectfully submitted, (Signed,) F. 0 . Mason, . . -> * \ V \ , "'•v" . - - ^ - • \* • • “-V. H. L. Smith, a. ■ A P. Richards, „’ ’ •; \ ) -j , v ' ... Geneva, January 1, 1884. S. H. Parker, P. N. Nicholas. THE SEWERAGE OF GENEVA, N. Y. 7 REPORT ON A PLAN OF SEWERAGE For the Village of Geneva, N. Y. To the Honorable the Board of Trustees of the Village of Geneva, N. Y. Gentlemen : I have the honor to submit a plan for the sewerage and sewage disposal of the village of Geneva, prepared at your request. In considering a plan for sewerage, it is first necessary to deter¬ mine what shall be allowed to enter the sewers. In some localities and under some circumstances it is necessary that all the water which falls on the surface of the ground should be carried off. In others, the conformation of the ground is such that no provision is necessary for removing rain water, and it is only requisite to carry off the water fouled by domestic uses, in addition to the animal excreta. A perfect system of sewerage is one in which only these foul domestic wastes are admitted to the channels provided for their con¬ veyance, and they are removed, before they have begun to decompose, to some point far enough distant from human habitations to preclude the possibility of their giving offence or producing disease. In practice, it is found necessary to provide for the introduction of additional water into sewers designed only to remove house waters, in order to facilitate the prompt removal of the foul matter and to cleanse the sewer channels. It is also found that even where • r- ' ; ■ ' ' ^.• 4 an entire exclusion of rain water from the sewers is aimed at, if no separate provision is made for carrying off rain water from the roofs of houses, some of it will be carried into the sewers in spite of the most stringent prohibitory ordinances. The sewers must, therefore, in any case, be made somewhat larger than is necessary for the simple removal of house wastes, and the amount of excess over this minimum size is to be determined in every locality by the conditions existing there. In a street, the dwellings on which are detached and are sur¬ rounded by open grounds, the sewer need not be proportioned to carry off more than the house discharge at the time of greatest flow, when running half full. ‘If a householder desires to carry off 8 THE SEWERAGE OF GENEVA, N. Y. the rain water from the roof in the sewer, he should be required to provide a cistern of sufficient capacity to hold three inches of rainfall on his roof, furnished either with an automatic flush tank, which will discharge the water collected in the cistern, in periodical flushes into the sewer, or, if there is no flush tank, the outlet from the tank to the sewer should be so small that it will take two days to empty the cistern. In large, closely built towns, it becomes necessary to provide underground channels for removing the rain water which falls on the streets and houses some distance from the natural water-courses, and in such cases, storm water may be properly admitted to the sewers, but in general and as a matter of principle, sewers intended for the removal of fouled waters from dwellings should be restricted absolutely to conveying them alone, as quickly as possible, to a point far distant from all residences. In the case of the village of Geneva, which was settled nearly one hundred years ago, I do not understand that any inconvenience has been experienced from permitting rain water to flow in the streets and into the natural water-courses which traverse the village and empty into Seneca Lake. The filthiness in and the stench arising from those water-courses, are caused by their having been used to carry off foul matters which never should be permitted to enter any natural stream, whether covered or open. It is proper that these water-courses should be retained for carry¬ ing off the natural flow of the territory they drain, and the work which has been done on the straightening and arching of Cemetery Creek and the stream which flows from North Street across the blocks to Exchange Street, at the New York Central Railroad, are steps in the right direction ; but every kind of filth and domestic waste waters should be carefully excluded from these channels, for the reason that any natural water-course should be kept as a drain, into which the water from the ground can percolate ; while a sewer must be made water-tight to keep the filth from leaking out into the surrounding soil. Castle Creek is another natural water-course of considerable importance, which flows through the centre of the blocks and ought to be kept free from all pollution by excremental matter and house wastes. Between Castle Street, where the creek crosses it, and Main Street, this stream occupies the only route by which the drainage of a large district west of the ridge which runs parallel to the Lake can be brought to the Lake without deep cutting. It would .be advisable to acquire a strip of land along its course and wall up the channel and lay, either under or along side of it, a pipe sewer to carry off the sewage from the district along the western part of Castle Street. THE SEWERAGE OF GENEVA, N. Y. 9 East of Main Street the sewer can very well be placed in the street, but the stream channel should still be continued in or near its natural course to the Lake. The small stream which passes through the blocks north of Castle Creek, may also be preserved as a water-course. . At the southerly end of the village, the natural drainage is to the south, by two streams which flow through ravines separated for some distance by high ridges parallel to the Lake shore, but uniting at Mile Point and emptying into the Lake there. The most westerly of these streams passes through a region where the population is scanty at present, and afterward through the Cemetery. I would advise that a strip of land along its course be acquired by the village, and the stream straightened where necessary and kept clean. If the population should grow in that direction, it maybe necessary, eventually, to arch it over, but this will probably not be needed for some time. It would be well, however, to acquire the land soon, and as soon as it becomes needed it will be well to lay a sewer along the course of the stream to Mile Point, independent of the water-course itself. It will be seen that by its topography the village is divided natur¬ ally into two main districts, the sewage of which must be discharged in different directions. The territory north of Hamilton Street all drains to the north and west, and has two or three natural outlets. If the sewage is to be discharged into the Lake it is very desirable that only one outlet should be provided for all the sewage from north of Hamilton Street, and that the outlet should be where the slight current of the Lake will carry it away from the town and not allow it to remain stagnant inside of the breakwaters. It is practicable to carry all this sewage to one outlet at the mouth of Marsh Creek. The territory lying south of a line drawn across the village near Hamilton Street has its natural outlet at Mile Point Creek, at the south end of the village. The peculiar topography of this section makes the arrangement of its sewers a difficult problem to solve satisfactorily. Main Street, on which a majority of the dwellings front, lies on the summit of a narrow ridge, on each side of which the ground falls off rapidly, so that the basements and cellars of the houses, which are set back from the street, are so far below the level of the street that a sewer in Main Street, which would be low enough to drain them, would necessarily be put very deep, probably 14 to 16 feet below the surface. IO THE SEWERAGE OF GENEVA, N.Y. On the east side, the slope to the Lake is steep, the bank is irreg¬ ular in its contour, and for the most part thickly wooded. At its base, along the Lake shore, a railroad runs. A sewer taking the drainage from the rear of the houses, would have to be built entirely on private property along this bank, and, from a hasty examination, I judge that it would either run over very irregular ground, requiring some heavy work in cuttings and embankments, or else follow a very crooked line. In any case, it could not be con¬ structed without the consent of all the property owners, or the con¬ demnation of a strip of land by the village. If it were built along the line of the railroad, at the foot of the hill, the right of way would have to be purchased or condemned, and the house drains would be long and laid over rough ground. On the west side of Main Street the ground slopes westward to the ravine between Main and Pulteney Streets, and if there were no sewer in Main Street, it would be necessary to acquire a strip of land and lay the sewer across the lots, in that ravine which is so deep as to prevent the sewage from most of the Main Street houses from being carried through to the Pulteney Street sewer. The additional length of house drains required by this method of drainage would go far to compensate for the greater cost of putting the sewer in Main Street at the necessary depth. Any estimates made without exact surveys of the ground must be only approximate, but they can be made with sufficient accuracy to give a fair comparison of the cost of the several possible methods, as follows:* First .—Estimated cost of sewer in Main Street, laid 16 feet be¬ low the surface, with a house connection 80 feet long, every 200 feet on each side. $9*385 Second .—Estimated cost of sewer along railroad for the houses on the east side of Main Street, and sewer between Main and Pulteney Streets for the houses on the west side of Main Street, from Hamilton to Jay Streets, with house con¬ nections complete, the sewers being 5 feet below the surface. 1 o, 145 Third .—Estimated cost of sewer about 100 feet east of Main Street, through private property on the hill side, the houses on the west side of Main Street, for 1,000 feet south of Hamilton Street, draining to the sewer in Pul¬ teney Street, and for the remainder of the distance drain¬ ing to a sewer in the ravine between Main and Pulteney Streets, from near St. Clair Street to Jay Street. ...~ 9,113 * The estimates of the cost are given in detail in the report filed with the Trustees. THE SEWERAGE OF GENEVA, N. Y. i; As these three plans differ so little in cost, and the second and third require an additional expenditure for right of way, I have laid down on thb map the one which appears simplest and least likely to en¬ counter any obstacles from legal complications, namely, the sewer through Main Street, with the houses on each side draining directly into it. It has been suggested to me that the dwellings on the east side of Main Street might continue to drain into the Lake, as at present. Leaving them out of consideration, the third plan above mentioned, as shown by broken lines on the map, will be much the cheapest for this district. This location maybe considered subject to change, if more exact detailed estimates, based on surveys and a canvass of the wishes of the property owners as to right of way through their land for a public sewer, should show another plan to be less expensive. I do not think it would be proper to discharge any sewage into the Lake along the village front, between Mile Point Creek and Marsh Creek. The sewage discharged from the southern district, at Mile Point Creek, ought not to be allowed to enter the Lake in its crude state. Its volume will never be very great, to be sure, but there is a slight current northward, which might lodge offensive matter along the shore. A favorable site for disposing of it by sub-surface irrigation is found in Mile Point Gully, between Main Street and the S. G. & C. Railroad. This method of sewage disposal has been successfully used for some years in this country. The sewage is collected in tight tanks, in which the coarser matters settle, and the liquids are flushed out peri¬ odically into tile drains laid about ten inches below the surface • ' • - - —: f • ' of the ground. These drains are laid with open joints, and on very slight grades. It is found that when the soil under them is thoroughly underdrained by other tile drains, emptying into a natural water¬ course, and the flushing is performed at regular intervals, the soil takes up all the impurities, grass grows luxuriantly over the irrigated area, and the effluent water from the drains is pure. There is suffi¬ cient area of unoccupied land in the Mile Point Gully to dispose of the sewage of a larger population than is likely to occupy the southern section of the village, and no nuisance or offence of any kind can follow the adoption of this system of disposal. This system has been successfully applied at Cumberland Mills, in Maine, at Lenox, in Massachusetts, at Bryn Mawr, in Pennsylvania, and other places, by Mr. George E. Waring and other engineers. 12 THE SEWERAGE OF GENEVA, N. Y. For disposal of the sewage from the village north of Hamilton Street, some other method must be adopted. It does not appear to me to be necessary to take any measures for purifying this sewage. I do not see that any harm can be done by discharging it into the Lake east of the canal basins, about the mouth of Marsh Creek. Its volume will not be so great as to cause a nuisance along the Seneca River. Being discharged fresh into the Lake it will probably be consumed by fishes before the water it has entered will have reached the river. If, at some future time, it should prove to be a nuisance, the outlet sewer could be continued eastwardly to some land suitable for the purpose, and the sewage pumped up on the land and disposed of by irrigation. It is very probable that the day is far distant when this treatment of the sewage will be required. There is a small section east of Exchange Street, from the N. Y. C. R.R. to North Street, which lies so low in the swamp bordering Marsh Creek that it cannot be sewered without either raising the grades of the streets several feet or pumping up the sewage. It would probably be easiest to raise the streets, and bring the houses and cellars out of the swamp land. The map submitted herewith is prepared from the village map, and elevations of the ground taken by Mr. G. Root, C. E., and shows the elevations of the street surface, and of the inside bottom of the sewers proposed, and the gradients and sizes of all sewers projected. The sewers are proportioned to convey, when running half full, the house sewage at the hour of greatest discharge. The smallest sewer used is a 6-inch pipe, that being the least size which experience shows to be safe to insure against stoppage by the matters which will get into a sewer in spite of regulations and precautions. The size is increased at the point where a 6-inch pipe is not capable of conveying, when half full, an amount of sewage equal to an hourly flow of 150 gallons for each 100 feet of street sewered, and this ratio is made the basis of all calculations for the sizes of the sewers, up to the 20-inch outlet sewer along Lake Street. For all sizes of sewers, up to 20 inches diameter, the best quality of vitrified earthenware pipe should be used, laid true to line and grade, with the joints made perfectly water-tight with the best Portland cement. Hub and spigot pipe should be used up to 10 inches diame¬ ter, and straight pipe, with collars, for diameters greater than 10 inches. Branch pipe for house connections should be put in at the time of laying, so that the main pipe may never be disturbed again. Manholes should be put in about 1,000 feet apart on straight lines and at all junctions of branch sewers, and smaller openings THE SEWERAGE OF GENEVA, N. Y. 13 extending to the surface of the street, about 300 feet apart. House connections should be of 4-inch pipe extending from the sewer to the top of the soil-pipe at the roof of the house without a break or trap, to insure ventilation and circulation of air. At every dead end of a sewer there should be means of flushing provided. The best effect, with the least expenditure of water, is obtained by an automatic siphon flush-tank, filled gradually from the water mains and empty¬ ing itself suddenly into the sewer. The use of the automatic flushing tank, in this connection, involves the probable payment of a tax of nine cents per foot of sewer affected thereby, as compensation for a patent claimed for the combination. Other arrangements for flushing are practicable, but they involve more labor and dependence upon the fidelity of laborers employed by the corporation. Which method involves the least risk and actual annual expense, is a question which can only be decided after careful investigation in each case, the difference of cost either way being slight, and the security of flushing regularly, more assured by the automatic tanks. I have made the estimates on the assumption that they will be used. Good materials and workmanship are essential, and these can only be obtained by thorough inspection of the work by competent men during its construction. Taken in detail, the plan provides that the sewage from Main and Pulteney Streets, south of Hamilton Street, shall be carried to the valley on Jay Street, and thence along the line of the brook to Mile Point Gully where it will be received in a tank and periodi¬ cally flushed into sub-surface drains on ground prepared for the pur¬ pose, either north or south of the brook. The sewage from the region west of the hill between Main and Pulteney Streets, from Hamilton to High Street, will be concentrated at the intersection of Pulteney and William Streets, and conveyed in a 16-inch pipe through William Street to Main. The cutting at the deepest point on William Street will be 24 feet. This is the only deep cut in this district. The rest of the sewers fol¬ low the surface grades very closely, and are generally nine feet below the street grade. It would be practicable to avoid the deep cut in William Street by carrying the sewer along the line of the brook through private prop¬ erty in the middle of the block. The drains from quite a number of houses are now led into the brick sewer recently built along the line, and all the sewage of the district might be carried in it. As I have before stated, there are serious objections to this method of converting a natural water-course into a sewer. Besides 14 THE SEWERAGE OF GENEVA, N. Y. the difficulty of making the channel porous to receive drainage and at the same time tight to prevent pollution of the soil by the sewage, the fact must be taken into consideration that the only access to the sewer will be over private property, and that the town cannot compel a property owner to connect with the sewer if the only way he can make such connection is by crossing another person’s land. If after due consideration of the sanitary and legal objections to such a course, you should decide that the pecuniary advantages over¬ weighed them, the sewage might be conveyed in the brook Culvert from the corner of William and Pulteney Streets to Exchange Street, where it would turn into the main sewer shown on the plan. When the flow of water in the brook was too great for the main sewer to carry it, the surplus would flow into the Lake by an over¬ flow to be provided at Exchange Street. By using the present brook sewer in this way, the size of the sewers on William and Main Streets for 1,300 feet could be reduced from fifteen inches to six inches, and the cutting at the summit on William Street would be nine feet in¬ stead of twenty-four feet. The saving of cost would be about $1,000. Resuming the description of the scheme shown on the plan, the sewer will pass through Main Street to Castle Street, receiving other sewers on its way, and pass down Castle Street to Exchange Street. At Genesee Street it will be joined by the sewer draining the upper part of Castle Street, beyond Pulteney Street. This sewer it is proposed to bring across the block on the line of the Castle Creek for about 1,000 feet, as before mentioned. To bring it down Castle Street from Pulteney to Main would require a cutting of over 30 feet in depth. The district north of Lewis Street and west of Genesee Street will be drained down Lewis Street to Exchange Street, where it will meet the sewer of the district between Main and Genesee Streets. All the sewers meet on Exchange Street at Lake Street, and are carried by a 20-inch pipe sewer down Lake Street (passing under the Seneca and Cayuga Canal by a siphon of cast-iron pipe), and dis¬ charge into the Lake at Marsh Creek, unless it should be desired to go further from the village, as previously stated, for disposal of the sewage by pumping it on to land for irrigation. From the annexed schedule* of sizes of sewers it will be seen that there are 76,040 feet, or 14.4 miles of sewers provided for. I have divided these into ten districts, according to what seems the most probable division of the order of the construction of the sewers. * Not printed. THE SEWERAGE OF GENEVA, N. Y. 15 The first district includes the main business part of the village from Main Street to the Lake, between Hamilton and Lewis Streets. The sewerage will cost approximately $19,397 for 13,480 feet of sewers. This is the most costly district in proportion to the length of the sewers, owing to its containing the main outfall sewer. The second district lies between ,Main and Pulteney Streets, from Hamilton to Lewis Street. The sewage will be concentrated at the corner of Pulteney and William Streets, and carried down William to Main Street. The cost is approximately $16,337 for 13,570 feet of sewers. The third district lies on the ridge and drains toward the south. The sewage will be disposed of by sub-surface irrigation in Mile Point Gully. The cost is approximately $16,895 for 10,090 feet of sewers, including the disposal works at Mile Point. The cost of this district can be reduced to $8,760 by omitting the Main Street sewer, as suggested in a previous part of this report. The sewerage for these three districts will therefore cost approxi¬ mately $52,629 for 37,140 feet of sewers. The seven other districts will require 38,900 feet of sewers, esti¬ mated to cost $44,263, making the aggregate cost of sewering the village completely, $96,892 for 76,040 feet of sewers. This amount will not, of course, require to be expended all at once. The first three districts need sewering more than the others. In constructing the sewers for them, the proportional cost will be greater than for the sewers further from the outfall, and the whole burden of the expense ought not to fall on the property which will be directly benefited. For instance, the sewers of the first district have to be made large enough to carry the sewage from seven out of the remaining nine districts, and nearly half of these sewers are larger than would be necessary to carry only the sewage from the district itself. The cost is estimated at $19,397, whereas if the capacity were confined to the one district it would be $15,940. It would be only equitable, therefore, for the expense to be divided into two parts, one part, representing the cost of the smallest sewer, to be assessed on the frontage along which sewers are laid, and the other to be assessed on all property in the districts which the main sewers will eventually drain. If the work is undertaken at all, the first three districts ought to be sewered altogether, both for sanitary and economical reasons. If the work is to be done, it should be executed under the super¬ vision of an engineer who has had experience in building such work [6 THE SEWERAGE OF GENEVA, N. Y. and in dealing with contractors. No guarantee in a contract can supersede the necessity for thorough intelligent oversight and inspec¬ tion during the progress of construction. The prices assumed in the estimates are liberal, and are believed to be ample to cover all expenses of surveys, plans, engineering, in¬ spection and contingencies. Respectfully submitted, 63 Bleecker Street, New York City, December, 1883. J. J. R. CROES, Civil Engineer. K APPROXIMATE ESTIMATE OF COST OF SEWERS. District. Length of Sewers. Cost. 1 .13,480 feet. $19,397 2 .i 3 , 57 o “ 16,337 3 .10,090 “ 16,895 4 . 6,750 “ 8,168 5 . 5,39° “ 6,039 6 . 3,97° “ 4,48o 7 . 2,900 “ 3,228 8 . 4,3°° “ 4,728 9 . 8,440 “ 9,346 10 . 7T5° “ 8,274 Total.76,040 feet. $96,892 I