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1913
CREATING A WORLD
FAMOUS STREET
ARGUMENT
of
Charles H. Wacker,
Chairman of the Chicago
Plan Commission, in behalf
of widening and extending
Michigan Avenue to properly
connect the North and South
: sides of Chicago; with ordi-
nance for same, detailed
drawings and estimate of cost
as prepared by the Board of
Local Improvements of the
City of Chicago.
ARGUMENT IN FAVOR OF PLAN FOR THE PROPOSED MICHIGAN
AVENUE CONNECTING LINK IMPROVEMENT.
BY CHARLES H. WACKĖR, CHAIRMAN OF THE CHICAGO PLAN COMMISSION,
BE-
FORE THE BOARD OF LOCAL IMPROVEMENTS OF THE CITY OF CHI-
CAGO AT A PUBLIC HEARING, MAY 20, 1913.
Mr. President and Members of the Board of Local Improvements: :
I am here as. Chairman of the Chicago Plan Commission, and to rep-
resent that Commission, which body was created by the City Council of
the City of Chicago November 1, 1909. The personnel of the Chicago Plan
Commission is broadly representative of the official administration and
of the entire citizenship of the City of Chicago. Its duty, in part, is to
study the Plan of Chicago and to recommend what part or parts of the
Plan should be adopted by the city and carried to completion.
Prior to the public hearing held by your Honorable Body on July 12,
1911, six years had been devoted to the study of plans for an adequate
connecting link between the north and south sides by committees of the
City Council, Real Estate Board, Architects, South Park and Lincoln Park
Boards, special Council Committees and other prominent citizens, and for
three years by the Plan Committee of the Commercial Club and the Chi-
cago Plan Commission, to which body the Plan of Chicago was committed
for the purpose which I have just indicated.
During those years of study on the widening and projection of Michi-
gan avenue hundreds of meetings and conferences were held. Many plans
were considered and a vast amount of expert data and testimony was in-
troduced and carefully weighed. Finally the plan known as Plan No. 3
was unanimously adopted at a meeting of the Chicago Plan Commission,
held in the Hotel La Salle July 10, 1911, as being the final plan the Chi-
cago Plan Commission would stand for and recommend to your Honorable
Body for adoption and execution.
On July 12, 1911, in accordance with the action of the Chicago Plan
Commission, Plan No. 3 was presented for your consideration and at the
close of said hearing your Honorable Body unanimously voted to have an
estimate of cost of construction and of the property to be taken and dam-
ages to buildings prepared, to be submitted to your Honorable Body for
consideration at a subsequent hearing.
Since that action on the part of your Honorable Body, the Chicago
Plan Commission has worked with the departments of the city, aiding in
every possible way in the preparation and completion of the necessary
details upon which to base said estimates. The findings of your engi-
neer are before you at this time, complete in every detail, and the cost of
the entire improvement, including construction, taking of property and
damage to buildings, has been fairly computed.
After the Board of Local Improvements had voted to have the esti-
mate prepared on Plan No. 3, it was found, after the most painstaking in-
vestigation relating to traffic, grades, levels, architectural effect, expedi-
ency, economy and all else which should properly be taken into considera-
tion as concerning the best interests of the people of Chicago, the city's
future and the special interests involved, that the structural elevation
should begin at Lake street in place of at Randolph street. This matter
was discussed thoroughly at several meetings of our Executive Commit-
tee, a special committee was appointed to go into it, and upon their rec-
ommendation, based upon the most exhaustive study, this change in the
plan was finally approved and unanimously adopted by both the Executive
Committee and the Chicago Plan Commission and was recommended to
your Honorable Body.
The Chicago Plan Commission now urges the adoption of said Plan
No. 3, as changed, by your Honorable Body, and urges the carrying out of
301460
this project without delay. The arguments of the Chicago Plan Commis-
sion in favor of Plan No. 3, which provides for a two-level thoroughfare
from Lake street to Ohio street, are as follows:
First: Teaming traffic on the east and west streets between the
Illinois Central freight terminal and the new industrial district north of
the river has produced a traffic congestion perhaps unparalleled in a single
section of any city in the world. Such congestion will continue and in-
crease with the contemplated outer harbor.
Verification of this statement is contained in a report submitted to
the Chicago Plan Commission by Captain C. C. Healy of the traffic depart-
ment of the Police Department on August 11, 1911. This census is for
eleven hours from 7:00 A. M. to 6:00 P. M., and shows the number of
vehicles traversing and crossing Michigan avenue from Washington street
to Indiana street and over the Rush street bridge as follows:
"At Michigan avenue and Washington street.
8,241
At Michigan avenue and Randolph street.
2,973
At Michigan avenue and Lake street..
7,251
At Michigan avenue and South Water street.
9,131
At the south end of the Rush street bridge..
9,725
At Rush and Michigan streets..
8,843
At Rush and Illinois streets.
6,437
At Rush and Indiana streets.
5,583
Total.
..58,184"
"Exclusive of the traffic on the Rush street bridge,” Captain Healy's
report shows that “the grand total of vehicles at the eight street cross-
ings on Michigan avenue between Washington and Indiana streets (includ-
ing River street traffic) is 50,330."
“As a comparison with the foregoing census of Chicago traffic,” Cap-.
tain Healy continues, "the following figures of a London census, taken in
April, 1911, are very interesting. This London census was very complete,
370 men being employed to secure same.
“The number of vehicles passing through four of London's bridges in
twelve hours of one day was 18,912. Of this number London bridge had.
7,578. This bridge has long been considered the busiest traffic vehicle
bridge in the world, but when compared with Rush street bridge of Chi-
cago we find that we have an increase of approximately 16%.
"At eight of the chief points of entry into London city, the total of
vehicles of all descriptions was 35,443. The grand total of vehicles at eight
street crossings on Michigan avenue between Washington and Indiana
streets, exclusive of the Rush street bridge, is 50,330, and as 20% of this
total is east and west bound, the grand total then is 10,066 east and west
hound vehicles and 40,264 north and south bound.
"These figures show an increase in the total traffic on Michigan ave-
nue and crossing it at these eight principal intersections of 42,% over the
traffic on the eight principal points of entry into the city of London. Then,
too, the London report is for twelve hours, and ours is only for eleven
hours. On Fleet street, one of the busiest thoroughfares of London, the
total amount of vehicles of all descriptions was 9,575 in twelve hours.
150 less than the Rush street bridge count.
"These figures are authentic and were secured direct from the London
traffic officials. The eight chief points shown in the London report are
presumed to be the busiest thoroughfares and are named as follows:
Holborn Bars, Temple Bar, Aldgate, Aldersgate, Finsburg Covenant, Bishop
Gate, Victoria Embankment and Farrington street. These streets are all
highways leading to the rural districts, and in view of the fact that the
report speaks of the points of entry, it is presumed that these figures were
secured at the points of entrance to the city proper.
“The Chicago police traffic department census shows an increase in
traffic of all sorts over the Rush street bridge of more than 60% in the last
three years. The cross street traffic shows a 23% increase for the same
period. The freight traffic on all east and west streets north of the river
is constantly increasing because warehouses and manufacturing plants find
this an admirable locality."
Second: The plan which is best adapted to improve the existing con-
ditions of intolerable congestion at these points is a plan of a raised street
as it separates the east and west streams of traffic from the north and
south traffic on Michigan avenue. Independently of this, it is the only one
which improves the grades of existing streets. It reduces the grades of
the east and west streets, leading to the Michigan Central and Illinois Cen-
tral freight yards and also to the approaches to the bridge north and south.
The grades of the east and west streets, now approximately 4%, will be
reduced to approximately 2%. Those north and south, now 5%, are to be
made 212 % to 3% for the benefit of commercial teaming.
Third: This plan takes into account also the Randolph street viaduct
traffic, by diverting it into Beaubien Court and distributing it at Lake
street under the raised street. This plan also will allow the C. & N. W.
R. R. to remain at its present grade. Any change made, unless the rail-
way were lowered to a subway tunnel, would force north and south team-
ing over grades altogether too steep, and would shut out the present ap-
proaches to the bridge from North River and Michigan streets.
Fourth: Michigan avenue is the eastern boundary of the quadrangle
formed by Twelfth street, Halsted street, Chicago avenue and Michigan
avenue, which four streets, it is believed, are destined to bear the heaviest
burden of traffic of any four streets in the city, and therefore should be
widened and improved. The quadrangle forms the foundation of the
street circulatory system of the Plan of Chicago. The widening and im-
provement of Michigan avenue has a very significant bearing on the widen-
ing of Twelfth street and on the ultimate widening of Halsted street and
the carrying out of the entire west side street plan system in the Plan of
Chicago.
The plan proposed for the projection of Michigan avenue is not a
l·lan to benefit the owners of automobiles or facilitate the progress of
pleasure vehicles, but to help all interests in the city by separating two
classes of traffic and thereby saving enormous sums annually to Chicago's
industrial concerns. The figures compiled from traffic investigations re-
veal that the city's commercial and industrial interests suffer the tre-
mendous loss of more than $500,000 each year through the traffic conges-
tion at the city's busiest connecting artery between the north and south
sides. At each of the eight crossings involved there is an average delay of
approximately thirty seconds or two and one-half minutes to each vehicle,
a grand total of 3,384 hours a day. For one year this gives an aggregate of
102,903 days actual waste. Considering $5.00 as a conservative estimate of
the cost of a team or a vehicle. for a day, the computation foots up a loss
cf $514,650 a year to the users of traffic over the stretch which the two-
level boulevard link will şpan. The saving of this loss alone would pay
for the proposed two-level connecting link in less than fourteen years.
A tunnel has been proposed as a maens of relief. Where is there a
sanitary board on earth that would permit the construction of a tunnel
sixty feet underground and nearly a mile long, to be used by countless
numbers of pedestrians and in summer by open vehicles of all sorts?
The idea has been put forth that a means of segregating traffic on Michi-
fan avenue would be to continue the lake road from Streeterville to Grant
Park, taking the automobile traffic out of Michigan avenue altogether. That
idea is contemplated ultimately in the Plan of Chicago and doubtless will
be carried out at the right time:
Then there are those who believe that a surface boulevard would ac-
complish the desired result. Imagine Michigan avenue widened on the
surface, connecting with Pine street by a single level bridge, with 10,000
vehicles a day crossing it at eight intersections-coal wagons, trucks, pro-
duce carts and all manner of slow-moving, unsightly heavy truck vehicles.
Add to that the Northwestern tracks north of the river crossing at grade,
and what sort of a street would you have?
The physical conditions surrounding Michigan avenue absolutely de-
mand the two-level plan for the segregation of traffic. Surely Chicago is
entitled to one decent, wide, respectable street, unencumbered by cross
traffic, high grade in every way, as is upper Fifth avenue in New York.
As has often and aptly been said, “it is a libel upon the common sense of.
the people of Chicago to suppose for a moment that a business thorough-
fare as fine as Michigan avenue is between Twelfth and Randolph streets-
possibly the most magnificent in the world-should create itself practic-
ally in ten years and be obliged to halt at an impregnable wall and narrow
gap at Randolph street. The only reason why the splendid character of
Michigan avenue south of Randolph street has not extended indefinitely
north is because of the wretched, squalid conditions existing there.'
When all is said and done, and all plans submitted, it must be clearly
apparent to all that the Plan of Chicago for the improvement of Michigan
avenue is fundamentally a plan to project and improve Michigan avenue-
a point not considered by the tunnel and lake road plan advocates. On the
other hand, to widen Michigan avenue on the surface and to permit cross
traffic as at present would mean that the streets leading from Beaubien
Court up to the east boundary of the widened thoroughfare would have a
grade of 10% and, therefore, be absolutely prohibitive for any teaming use
whatever.
There is no longer any talk about the plan creating a "street on
stilts.” Such talk was never made except to divert attention from the
real issue. The street when completed will carry the upper level from
kuilding line to building line, and the grades at the north and south ap-
proaches to the upper level will be almost imperceptible to anyone pass-
ing the street. All shops, stores and buildings of whatsoever nature will
have their entrances, shop windows, etc., on the upper, or boulevard level.
The lower level will be used for receiving and shipping purposes. At the
time this plan was first proposed it was widely misunderstood, but because
of the campaign of education conducted by the Chicago Plan Commission
through its lectures in all parts of the city and its literary propaganda,
what might be termed a "city-wide misapprehension” has been changed
into a "city-wide comprehension,” and we have now no fear whatever that
when the matter of the Michigan avenue improvement passes the Council
and goes to the people for a referendum vote on a bond issue, that it will
be quickly voted, as the great advantages of the Plan of Chicago are ap-
parent to all.
No citizen of Chicago acquainted with the facts can deny that intoler-
able conditions (daily growing worse) now exist on Michigan avenue from
Randolph street to the Chicago River, and north on Rush street from the
Chicago River.
All citizens of Chicago, at all acquainted with the facts, know that
some plan for properly connecting the North and South sides of our great
city must be developed and executed at an early date; that the plan must
bie à comprehensive one, not for today alone, but also for the future, and
that the plan to be finally adopted by your Honorable Body must take into
account the needs of the whole city. Therefore, this project has come to
be of such importance to the future welfare of Chicago that personal in-
terests can no longer be considered. The interests of a few must make
\ay for the interests of the many. This, I say, taking into consideration
the future harbor developments, sure to materialize along the lake shore,
north and south of the main branch of the Chicago River, and also the
enormous commercial and industrial development already taking place in
the district bounded by Chicago avenue on the north, the river on the
south, Lake Michigan on the east, and the north branch of the river on
the west.
It has been well said:
"The heart of Chicago extends from Halsted street to the lake, and
from the river to Twelfth street. Within a few years it will spread to
Ashland avenue on the west, Twenty-second street on the south and Chi-
cago avenue on the north. The heart of Chicago is badly congested, al-
though most of the buildings within the territory are low. Street traffic
conditions in this district will become insufferable if the buildings reach
the full height permitted by law. That practically all of them will go up
To the limit there is little doubt.” Property values will make that im-
!
perative. In this connection, remember that no street can ever be widened
between Michigan avenue and the south branch of the river.
BUSINESS DEVELOPMENT PRESENT CONDITIONS.
As a further argument demanding relief from traffic congestion in the
downtown section by providing more adequate arteries of traffic, the fol-
lowing facts have a direct and significant bearing on the Michigan avenue
improvement case:
At present Chicago has a population of two and one-quarter million
people and a central business area of one-quarter of a square mile, with a
mixed fringe of business and warehousing surrounding it. This area is
developed as follows:
16 stories and upwards
16%
12 to 16 stories..
14%
8 to 12 stories.
8.%
Under 8 stories.
62%
By averaging these figures we find that the area of the loop, or the
business area is carrying today 50% of its ultimate capacity if it is to be
built up solid to 16 stories. Such solid development is unlikely, due to
the probability that there will be many buildings, banks, hotels, adminis-
tration buildings and clubs, which will be of much less height than the
ordinary office building. It is probable that the loop is carrying today
60% to 70% of its ultimate business capacity, and that to provide for the
business necessities of a population of five million people, we shall require
at least 50% more area than is now in use, and with a population of eight
or ten million people, three times the present area will be necessary. This
is on the assumption that the whole central business area will be solidly
and intensely built up with tall buildings, with the exception of the areas
used by the classes of buildings referred to.
0
PROBABLE AREA WITH FIVE MILLION OF POPULATION IN CHICAGO.
It is probable, however, that much more area than this will be occu-
pied in caring for these business necessities, as not all the blocks will be
developed to their limit. Rather will there be a solid center and a fringe
partially solid covering twice the area stated or even more.
PRESENT MOVEMENT.
Intense development is already taking place outside the loop, pointing
to the efforts of the central area to find relief even at this time. The only
well defined direction of this movement is southwards along Michigan
avenue.
That the business area can grow southwards only along Michigan ave-
nue, Wabash avenue and State street is apparent after one glance at
the map.
The construction of the two-level street as advocated in Plan No. 3
will take 60% from the present traffic on Michigan avenue and carry it
over the upper level, thereby adding more than 200% to the present facili-
ties in the lower thoroughfare for commercial purposes.
In one of our pamphlets we reach the conclusion, and we challenge
contradiction of the statement, that “Michigan avenue is probably destined
lo carry the heaviest movement of any street in the world. Any boule-
vard connection in Michigan avenue which fails to recognize the basic im-
portance of this street will be a waste of money and energy. Any impair-
ment of the capacity of this street, at any point along its entire front, and
any weakening of this foundation, is a grave error of the first magnitude.'
A careful study of our conditions has acquainted us with our needs.
We
believe in the future of Chicago, and we must adequately provide for her
needs, or be held responsible by posterity for our neglect.
Procrastination marks the beginning of that end. To delay the im-
provement of Michigan avenue five years will add 50% to the cost; ten
years will double it. On the other hand, if this plan for Chicago's better-
nient is now carried out, the record of the present city adininistration will
shine as a beacon light in the history of our great city because of the con-
structive work which the Mayor, the City Council and Board of Local Im-
provements were big enough to undertake.
RECOMMENDATION, ESTIMATE AND ORDINANCE.
RECOMMENDATION BY BOARD OF LOCAL IMPROVEMENTS.
To the Mayor and Aldermen of the City of Chicago, in City Council As-
sembled:
We hereby submit an ordinance for the improvement of a thorough-
fare extending from the north curb line of East Randolph street north-
ward, along North Michigan avenue and over the Chicago River and thence
over private property and along Pine street and Lincoln Parkway to the
center line of East Chicago avenue, and the necessary approaches thereto,
together with a connecting bridge across the Chicago River, and for the
condemnation of lands requisite therefor, which improvement is more
particularly described in said ordinance, together with an estimate of the
cost of said improvement (omitting land to be acquired), and recommend
the passage of said ordinance, and the making of the improvement de-
scribed therein.
Respectfully submitted,
(Signed)
Geo. A. SCHILLING,
CLAYTON F. SMITH,
FRED BURKHARD,
FRANK X. RYDZEWSKI,
FRANK SIMA,
Board of Local Improvements of the City of Chicago.
Dated Chicago, May 26th, A. D. 1913.
AN ORDINANCE
For the iinprovement of a thoroughfare extending from the north curb
line of East Randolph street northward along North Michigan avenue
and over the Chicago River, and thence over private property and
along Pine street and Lincoln Parkway to the center line of East Chi-
cago avenue, and the necessary approaches thereto, together with a
connecting bridge across the Chicago River, and for the condemnation
of lands requisite therefor in the City of Chicago, County of Cook and
State of Illinois.
Be it ordained by the City Council of the City of Chicago:
SECTION 1. That a local improvement shall be made within the City
of Chicago, County of Cook and State of Illinois, the nature, character, 10-
cality and description of which local improvement is as follows, to-wit:
Said local improvement shall extend from the north curb line of
East Randolph Street northward along North Michigan Avenue and over
the Chicago River and thence over private property and along Pine
Street and Lincoln Parkway to the center line of East Chicago Avenue.
Said improvement shall consist of a two-level thoroughfare comprising
an upper level extending the entire distance between said points and sup-
ported between East Lake Street and East Indiana Street upon an elevated
structure of steel and concrete, and a lower level extending from the south
line of East Lake street to the north line of East Indiana Street, together
with approaches to said thoroughfare along intersecting streets and alleys.
That part of said thoroughfare extending across the Chicago River, here-
inafter called the bridge, shall consist of a double-decked bascule bridge,
the upper level of which shall connect the portions of the upper level
of said thoroughfare lying north and south of said river, and the lower
level of which shall connect the portions of the lower level of said thor-
oughfare lying north and south of said river. Said improvement shall
include filling, excavation, retaining walls, abutment walls, bridge houses,
curbing, pavements, sidewalks, stairways, electric lamps, construction of
new sewer catchbasins and adjustment of existing sewer manholes and
other work requisite therefor, and shall be constructed in the manner and
of the location, material, grades, and dimensions hereinafter specifically
described and as shown on drawings numbered 1 to 95 inclusive, which
drawings are hereto attached and hereby made a part hereof.
2
Said thoroughfare from the north curb line of East Randolph Street
to a line 428.74 feet north of and parallel with the north line of East
South Water Street shall be of a width of 127.5 feet. That portion of
said thoroughfare between said line 428.74 feet north of the north line
of East South Water Street and the Chicago River, hereinafter called the
South Plaza, shall be of the dimensions shown on the said drawings hereto
attached. The upper level of the said bridge shall be of a width of 90
feet and the lower level thereof shall be of a width of 60 feet. The said
bridge shall have a clear span of 220 feet between abutments. The portion
of said thoroughfare between the north dock line of the bridge and a line
22 feet south of and parallel with the south line of East Michigan street,
hereinafter termed the North Plaza, shall be of the dimensions shown on
said drawings. The width of said improvement between said line 22 feet
south of the south line of East Michigan Street, being the north line of
said North Plaza, and the northern terminus of said improvement, shall
be 141 feet. From East Randolph Street to the south line of the South
Plaza, the west line of the thoroughfare shall coincide with the present west
line of Michigan Avenue, and from the north line of the North Plaza to
East Chicago Avenue the east line of the thoroughfare shall coincide with
the east line of Pine Street and Lincoln Parkway.
That for the purpose of the construction of said improvement and
the widening of North Michigan Avenue and the widening and extension
of Pine Street and the widening of Lincoln Parkway which are requisite
therefor, the following lots, blocks, tracts and parcels of land, all of which
are necessary for said purpose, shall be acquired by condemnation, and
any buildings and obstructions thereon shall be removed, to-wit:
All that part of Lots 1 and 2 and of Sub-lot 1 in resubdivision of Lots
3, 4, 7, 8 and 10 to 19 in Block 4, Fort Dearborn Addition to Chicago,
beginning at a point in the west line of North Michigan Avenue forty-three
and forty-seven one-hundredths (43.47) feet north of the south line of
Lot 5 in said Block 4, thence west on a line forming angles of ninety
(90°) degrees with said west line of North Michigan Avenue a distance of
forty and sixty-seven one-hundredths (40.67) feet, thence northwesterly
on a line forming with the last described line an angle of one hundred and
forty-three degrees, three minutes and thirty seconds (143° 3' 30") a dis-
tance of fifty-seven and sixty-seven one-hundredths (57.67) feet more or
less to the southeasterly line of River Street as it is now used by the public,
thence northeasterly along said southeasterly line of River Street a distance
of fifty-one and forty-three one-hundredths (51.43) feet to the point where
the said River Street turns easterly, thence east along the south line
of said River Street as now used by the public a distance of fifty-five and
eighty-five one-hundredths (55.85) feet to the west line of North Michigan
Avenue, thence south along said west line of North Michigan Avenue a
distance of seventy-five (75) feet to the point of beginning.
3
Also the portions or that part of Lots 1, 2, 3, 4 and 5 lying west of a
line drawn from a point one hundred and twenty-one and eighteen-hun-
dredths (121.18) feet east of the northwest corner of Lot 1 to a point one
hundred and twenty-four (124) feet east of the southwest corner of Lot 5,
all in Block 5, Fort Dearborn Addition to Chicago, described as follows:
All of that part of said Lot 1, also all of that part of said
part of Lot 2, beginning at the northwest corner of said part
of Lot 2, thence east along the north line of said part of
Lot 2 one hundred and twenty-one and
and seventy-three one-hun-
dredths (121.73) feet, thence south forty (40) feet, thence, west sixty
and seventy-four one-hundredths (60.74) feet along a line parallel to and
four (4) feet north of the south line of said part of Lot 2, thence south
four (4) feet to the south line of said part of Lot 2, thence west along
the south line of said part of Lot 2 sixty-one and fifty-hundredths (61.50)
feet, thence north along the west line of said part of Lot 2 forty-four (44)
feet to the point of beginning.
Also the west sixty-one and fifty-hundredths (61.50) feet of said part
of Lots 3, 4 and 5.
Also the portions of that part of Lots 1, 2, 3, 4 and 5 lying east of a
line drawn from a point one hundred and twenty-one and eighteen-hun-
dredths (121.18) feet east of the northwest corner of Lot 1 to a point one
hundred and twenty-four (124) feet east of the southwest corner of Lot
5, all in Block 5, Fort Dearborn Addition to Chicago, described as follows:
All of that part of said Lot 1, also all that part of said part of Lot 2
described as follows: Beginning at the northwest corner of said part of
Lot 2, thence east along the north line of said part of Lot 2 thirty-four
and eighty-eight one-hundredths (34.88) feet, thence southerly forty and
three-hundredths (40.03) feet to a point thirty-five and eighty-four one-
hundredths. (35.84) feet east of the west line of said part of Lot 2, thence
west thirty-five and eighty-four one-hundredths (35.84) feet along a line
parallel to and four (4) feet north of the south line of said part of Lot
2, thence north along the west line of said part of Lot 2 forty (40) feet to
the point of beginning.
Also all of Sub-Lot 8 (except the east thirteen and eight-tenths (13.8)
feet) and all of Sub-Lots 9 and 10 and the west sixty-one and fifty-
hundredths (61.50) feet of the west half of Sub-Lot 11, all in Lots 6 to
11, Block 5, Fort Dearborn Addition to Chicago.
Also all of the west sixty-one and fifty-hundredths (61.50) feet of
Lots 1, 2 and 3 in Dyer's subdivision of the west half of Sub-Lot 12 of Lots
6 to 11, Block 5, Fort Dearborn Addition to Chicago.
Also all of Lats 1, 2 and 3 (except the east nine and seven-hundredths
(9.07) feet) of said Lot 3 and the west sixty-one and fifty-hundredths
(61.50) feet of Lot 5, the west sixty-one and fifty-hundredths (61.50)
feet of the north four (4) feet of Lot 6, the west sixty-one and fifty-
hundredths (61.50) feet of the south twenty-one (21) feet of 'Lot 6, the
4
1
west sixty-one and fifty-hundredths (61.50) feet of Lot 7, the west sixty-
one and fifty-hundredths (61.50) feet of the north four (4) feet of Lot 8,
the west sixty-one and fifty-hundredths (61.50) feet of the south eighteen
(18) feet of Lot 8, and the west sixty-one and fifty-hundredths (61.50). feet
of Lots 9, 10 and 11, all in Block 6, Fort Dearborn Addition to Chicago.
Also the west sixty-one and fifty-hundredths (61.50) feet of Sub-
Lots 1, 2, 3, 4, 5, 6 and 7, the west sixty-one and fifty-hundredths (61.50)
feet of the north half of Sub-Lot 8, the west sixty-one and fifty-hundredths
(61.50) feet of the south half of Sub-Lot 8, the west sixty-one and fifty-
hundredths (61.50) feet of Sub-Lots 9, 10 and 11, all in resubdivision of
Lots 1, 2, 3, 4 and 6 of Block 11, also the west sixty-one and fifty-hundredths
(61.50) feet of the south one-third (including accretions) of Lot 5, the
west sixty-one and fifty-hundredths (61.50) feet of the north two-thirds
(including accretions) of Lot 5, the west sixty-one and fifty-hundredths
(61.50) feet (including accretions) of Lot 7, and the west sixty-one and
fifty-hundredths (61.50) feet (including accretions) of Lot 8, all in Block
11, Fort Dearborn Addition to Chicago.
Also all of Lots 19; 20 and 21 of Wharfing Lots, Kinzie's Addition
to Chicago, excepting the portions of Lots 19 and 20 described as follows:
Beginning at the northwest corner of said Lot 19, thence easterly along
the northerly lines of said Lots 19 and 20 to a point forty-one and eighty-
four one-hundredths (41.84) feet easterly of the northwest corner of said
Lot 20, thence southwesterly along a straight line to a point in the west-
erly line of said Lot 19 ninety-two and ninety-hundredths (92.90) feet
southerly of the point of beginning, thence northerly to the point of
beginning.
Also all of Lots 22 and 23 and the westerly twenty-three and thirty-
two one-hundredths (23.32) feet of Lot 24 of Wharfing Lots, Kinzie's
Addition to Chicago.
Also all of Lot 1 and the easterly twenty (20) feet of Lot 2 in Block
6 of Kinzie's Addition to Chicago.
The westerly thirty (30) feet of Lot 2 in Block 6 of Kinzie's Addition
to Chicago, excepting the portion described as follows:
Beginning at the northwest corner of said Lot 2, thence easterly along
the north line of said Lot 2 a distance of twenty-five and twenty-five
one-hundredths (25.25) feet, thence southerly along a line parallel with
the west line of 'said Lot 2 a distance of fifty-three and twenty-nine one-
hundredths (53.29) feet, thence southwesterly a distance of thirty and
sixty-two one-hundredths (30.62) feet to a point in the southerly line
of said Lot 2 seven and forty-five one-hundredths (7.45) feet easterly
of the southwest corner of said Lot 2, thence to the said southwest corner
of said Lot 2, thence northerly to the point of beginning.
Also all of the south twenty-five (25) feet of Lot 1 and the south
twenty-five (25) feet of the east half of Lot 2, the north half of the south
RECOMMENDATION, ESTIMATE AND ORDINANCE.
RECOMMENDATION BY BOARD OF LOCAL IMPROVEMENTS.
To the Mayor and Aldermen of the City of Chicago, in City Council As-
sembled:
We hereby submit an ordinance for the improvement of a thorough-
fare extending from the north curb line, of East Randolph street north-
ward along North Michigan avenue and over the Chicago River and thence
over private property and along Pine street and Lincoln Parkway to the
center line of East Chicago avenue, and the necessary approaches thereto,
together with a connecting bridge across the Chicago River, and for the
condemnation of lands requisite therefor, which improvement is more
particularly described in said ordinance, together with an estimate of the
cost of said improvement (omitting land to be acquired), and recommend
the passage of said ordinance, and the making of the improvement de-
scribed therein.
Respectfully submitted,
0
(Signed)
Geo. A. SCHILLING,
CLAYTON F. SMITH,
FRED BURKHARD,
FRANK X. RYDZEWSKI,
FRANK SIMA,
Board of Local Improvements of the City of Chicago.
Dated Chicago, May 26th, A. D. 1913.
1
AN ORDINANCE
For the improvement of a thoroughfare extending from the north curb
line of East Randolph street northward along North Michigan avenue
and over the Chicago River, and thence over private property and
along Pine street and Lincoln Parkway to the center line of East Chi-
cago avenue, and the necessary approaches thereto, together with a
connecting bridge across the Chicago River, and for the condemnation
of lands requisite therefor in the City of Chicago, County of Cook and
State of Illinois.
Be it ordained by the City Council of the City of Chicago:
SECTION 1. That a local improvement shall be made within the City
of Chicago, County of Cook and State of Illinois, the nature, character, lo-
cality and description of which local improvement is as follows, to-wit:
Said local improvement shall extend from the north curb line of
East Randolph Street northward along North Michigan Avenue and over
the Chicago River and thence over private property and along Pine
Street and Lincoln Parkway to the center line of East Chicago Avenue.
Said improvement shall consist of a two-level thoroughfare comprising
an upper level extending the entire distance between said points and sup-
ported between East Lake Street and East Indiana Street upon an elevated
structure of steel and concrete, and a lower level extending from the south
line of East Lake street to the north line of East Indiana Street, together
with approaches to said thoroughfare along intersecting streets and alleys.
That part of said thoroughfare extending across the Chicago River, here-
inafter called the bridge, shall consist of a double-decked bascule bridge,
the upper level of which shall connect the portions of the upper level
of said thoroughfare lying north and south of said river, and the lower
level of which shall connect the portions of the lower level of said thor-
oughfare lying north and south of said river. Said improvement shall
include filling, excavation, retaining walls, abutment walls, bridge houses,
curbing, pavements, sidewalks, stairways, electric lamps, construction of
new sewer catchbasins and adjustment of existing sewer manholes and
other work requisite therefor, and shall be constructed in the manner and
of the location, material, grades and dimensions hereinafter specifically
described and as shown on drawings numbered 1 to 95 inclusive, which
drawings are hereto attached and hereby made a part hereof.
2
Said thoroughfare from the north curb line of East Randolph Street
to a line 428.74 feet north of and parallel with the north line of East
South Water Street shall be of a width of 127.5 feet. That portion of
said thoroughfare between said line 428,74 feet north of the north line
of East South Water Street and the Chicago River, hereinafter called the
South Plaza, shall be of the dimensions shown on the said drawings hereto
attached. The upper level of the said bridge shall be of a width of 90
feet and the lower level thereof shall be of a width of 60 feet. The said
bridge shall have a clear span of 220 feet between abutments. The portion
of said thoroughfare between the north dock line of the bridge and a line
22 feet south of and parallel with the south line of East Michigan street,
hereinafter termed the North Plaza, shall be of the dimensions shown on
said drawings. The width of said improvement between said line 22 feet
south of the south line of East Michigan Street, being the north line of
said North Plaza, and the northern terminus of said improvement, shall
be 141 feet. From East Randolph Street to the south line of the South
Plaza, the west line of the thoroughfare shall coincide with the present west
line of Michigan Avenue, and from the north line of the North Plaza to
East Chicago Avenue the east line of the thoroughfare shall coincide with
the east line of Pine Street and Lincoln Parkway.
That for the purpose of the construction of said improvement and
the widening of North Michigan Avenue and the widening and extension
of Pine Street and the widening of Lincoln Parkway which are requisite
therefor, the following lots, blocks, tracts and parcels of land, all of which
are necessary for said purpose, shall be acquired by condemnation, and
any buildings and obstructions thereon shall be removed, to-wit:
All that part of Lots 1 and 2 and of Sub-lot 1 in resubdivision of Lots
3, 4, 7, 8 and 10 to 19. in Block 4, Fort Dearborn Addition to Chicago,
beginning at a point in the west line of North Michigan Avenue forty-three
and forty-seven one-hundredths (43.47) feet north of the south line of
Lot 5 in said Block 4; thence west on a line forming angles of ninety
(90°) degrees with said west line of North Michigan Avenue a distance of
forty and sixty-seven one-hundredths (40.67) feet, thence northwesterly
on a line forming with the last described line an angle of one hundred and
forty-three degrees, three minutes and thirty seconds (143° 3' 30") a dis-
tance of fifty-seven and sixty-seven one-hundredths (57.67) feet more or
less to the southeasterly line of River Street as it is now used by the public,
thence northeasterly, along said southeasterly line of River Street a distance
of fifty-one and forty-three one-hundredths (51.43) feet to the point where
the said River Street turns easterly, thence east along the south line
of said River Street as now used by the public a distance of fifty-five and
eighty-five one-hundredths (55.85) feet to the west line of North Michigan
Avenue, thence south along said west line of North Michigan Avenue a
distance of seventy-five (75) feet to the point of beginning.
3
one
1
Also the portions or that part of Lots 1, 2, 3, 4 and 5 lying west of a
line drawn from a point one hundred and twenty-one and eighteen-hun-
dredths (121.18) feet east of the northwest corner of Lot 1 to a point one
hundred and twenty-four (124) feet east of the southwest corner of Lot 5,
all in Block 5, Fort Dearborn Addition to Chicago, described as follows:
All of that part of said Lot 1, also all of that part of said ·
part of Lot 2, beginning at the northwest corner of said part
of Lot 2, thence east along the north line of said part of
Lot
2
hundred and twenty-one and seventy-three one-hun-
dredths (121.73) feet, thence south forty (40) feet, thence, west sixty
and seventy-four one-hundredths (60.74) feet along a line parallel to and
four (4) feet north of the south line of said part of Lot 2, thence south
four (4) feet to the south line of said part of Lot 2, thence west along
the south line of said part of Lot 2 sixty-one and fifty-hundredths (61.50)
feet, thence north along the west line of said part of Lot 2 forty-four (44)
feet to the point of beginning.
Also the west sixty-one and fifty-hundredths (61.50) feet of said part
of Lots 3, 4 and 5.
Also the portions of that part of Lots 1, 2, 3, 4. and 5 lying east of a
-line drawn from a point one hundred and twenty-one and eighteen-hun-
dredths (121.18) feet east of the northwest corner of Lot 1 to a point one
hundred and twenty-four (124) feet east of the southwest corner of Lot
5, all in Block 5, Fort Dearborn Addition to Chicago, described as follows:
All of that part of said Lot 1, also all that part of said part of Lot 2
described as follows: 'Beginning at the northwest corner of said part of
Lot 2, thence east along the north line of said part of Lot 2 thirty-four
and eighty-eight one-hundredths (34.88) feet, thence southerly forty and
three-hundredths (40.03) feet to a point thirty-five and eighty-four one-
hundredths (35.84) feet east of the west line of said part of Lot 2, thence
west thirty-five and eighty-four one-hundredths (35.84) feet along a line
parallel to and four (4) feet north of the south line of said part of Lot
2, thence north along the west line of said part of Lot 2 forty (40) feet to
the point of beginning.
Also all of Sub-Lot 8 (except the east thirteen and eight-tenths (13.8)
feet) and all of Sub-Lots 9 and 10 and the west sixty-one and fifty-
hundredths (61.50) feet of the west half of Sub-Lot 11, all in Lots 6 to
11, Block 5, Fort Dearborn Addition to Chicago.
Also all of the west sixty-one and fifty-hundredths (61.50) feet of
Lots 1, 2 and 3 in Dyer's subdivision of the west half of Sub-Lot 12 of Lots
6 to 11, Block 5, Fort Dearborn Addition to Chicago.
Also all of Lots 1, 2 and 3 (except the east nine and seven-hundredths
(9.07) feet) of said Lot 3 and the west sixty-one and fifty-hundredths
(61.50) feet of Lot 5, the west sixty-one and fifty-hundredths (61.50)
feet of the north four (4) feet of Lot 6, the west sixty-one and fifty-
hundredths (61.50) feet of the south twenty-one (21) feet of Lot 6, the
4
west sixty-one and fifty-hundredths (61.50) feet of Lot 7, the west sixty-
one and fifty-hundredths (61.50) feet of the north four (4) feet of Lot 8,
the west sixty-one and fifty-hundredths (61.50) feet of the south eighteen
(18) feet of Lot 8, and the west sixty-one and fifty-hundredths (61.50) feet
of Lots 9, 10 and 11, all in Block 6, Fort Dearborn Addition to Chicago.
Also the west sixty-one and fifty-hundredths (61.50) feet of Sub-
Lots 1, 2, 3, 4, 5, 6 and 7, the west sixty-one and fifty-hundredths (61.50)
feet of the north half of Sub-Lot 8, the west sixty-one and fifty-hundredths
(61.50) feet of the south half of Sub-Lot 8, the west sixty-one and fifty-
hundredths (61.50) feet of Sub-Lots 9, 10 and 11, all in resubdivision of
Lots 1, 2, 3, 4 and 6 of Block 11, also the west sixty-one and fifty-hundredths
(61.50) feet of the south one-third (including accretions) of Lot 5, the
west sixty-one and fifty-hundredths (61.50) feet of the north two-thirds
(including accretions) of Lot 5, the west sixty-one and fifty-hundredths
(61.50) feet (including accretions) of Lot 7, and the west sixty-one and
fifty-hundredths (61.50) feet (including accretions) of Lot 8, all in Block
11, Fort Dearborn Addition to Chicago.
Also all of Lots 19, 20 and 21 of Wharfing Lots, Kinzie's Addition
to Chicago, excepting the portions of Lots 19 and 20 described as follows:
Beginning at the northwest corner of said Lot 19, thence easterly along
the northerly lines of said Lots 19 and 20 to a point forty-one and eighty-
four one-hundredths (41.84) feet easterly of the northwest corner of said
Lot 20, thence southwesterly along a straight line to a point in the west-
erly line of said Lot 19 ninety-two and ninety-hundredths (92.90) feet
southerly of the point of beginning, thence northerly to the point of
beginning.
Also all of Lots 22 and 23 and the westerly twenty-three and thirty-
two one-hundredths (23.32) feet of Lot 24 of Wharfing Lots, Kinzie's
Addition to Chicago.
Also all of Lot 1 and the easterly twenty (20) feet of Lot 2 in Block
6 of Kinzie's Addition to Chicago.
The westerly thirty (30) feet of Lot 2 in Block 6 of Kinzie's Addition
to Chicago, excepting the portion described as follows:
Beginning at the northwest corner of said Lot 2, thence easterly along
the north line of said Lot 2 a distance of twenty-five and twenty-five
one-hundredths (25.25) feet, thence southerly along a line parallel with
the west line of said Lot 2 a distance of fifty-three and twenty-nine one-
hundredths (53.29) feet; thence southwesterly a distance of thirty and
sixty-two one-hundredths (30.62) feet to a point in the southerly line
of said Lot 2 seven and forty-five one-hundredths (7.45) feet easterly
of the southwest corner of said Lot 2, thence to the said southwest corner
of said Lot 2, thence northerly to the point of beginning.
Also all of the south twenty-five (25) feet of Lot 1 and the south
twenty-five (25) feet of the east half of Lot 2, the north half of the south
1
5
half of Lot 1, the north half of the south half of the east half of Lot 2,
the north half of Lot 4, and the north half of the east half of Lot 2, also
the east half of Lot 11, the west twenty-five (25) feet of Lot 12 and the
east twenty-five (25) feet of Lot 12, all in Block 10, Kinzie's Addition to
Chicago.
Also all of Lot 1, the east half of Lot 2, the east half of Lot 11, and
all of Lot 12, all in Block 17, Kinzie's Addition to Chicago.
Also all of Lot 1 and the east twenty-five (25) feet of Lot 2, the east
three and one-half (312) feet of Lot 12, and the east eight and one-half
(842) feet of the west thirty-six and one-half (3672) feet of Lot 12, all of
Lot 13, the north thirty (30) feet of Lot 14 and the south seventy (70) feet
of Lot 14, all in Block 22, Kinzie's Addition to Chicago.
Also all of the east half and west half of Lot 1, the east two (2) feet
of Lot 2, the west twenty-three (23) feet of the east half of Lot 2, the east
half of Lot 6, and all of Lot 7, all in Block 29, Kinzie's Addition to Chicago.
Also the east seventy-five (75) feet of the south half of the east
half of Block 34, and the east seventy-five (75) feet of the north half
of the east half of Block 34, all in Kinzie's Addition to Chicago.
Also the east seventy-five (75) feet of the south sixty (60) feet of
the east one hundred and fifty (150) feet of Block 41, the east seventy-
five (75) feet of the north thirty-five (35) feet of the south ninety-five
(95) feet of the east one hundred and fifty (150) feet of Block 41, the east
seventy-five (75) feet of (except the east twenty-five (25) feet of the west
sixty-eight (68) feet of the north fifty (50) feet) and (except the west
five (5) feet of the north seventy-two (72) feet) and (except the south
twenty-two (22) feet of the north forty-four (44) feet of the east eighty-
two (82) feet), the north one hundred and twenty-three (123) feet of the
east one hundred and fifty (150) feet of Block 4, also the east seventy-
five (75) feet of the south twenty-two (22) feet of the north forty-four
(44) feet of the east eighty-two (82) feet of Block 41, all in Kinzie's Addi-
tion to Chicago.
Also the east seventy-five (75) feet of Lot 1, all of Lot 8, the east
seventy-five (75) feet of a strip of land nine (9) feet wide north of and
adjoining Lot 8, and the east seventy-five (75) feet of the north twenty-two
(22) feet of Lot 9, and the east seventy-five (75) feet of the south thirty-two
and one-half (3242) feet of Lot 9, all in Block 46, Kinzie's Addition to
Chicago.
Also all of Lots 1, 2 and 3 in the southeast corner of Block 53, and all
of Lots 1, 2 and 3 and the east fifteen (15) feet of Lot 4 in the northeast
corner of Block 53, the east seventy-five (75) feet of Lot 15 and the east
seventy-five · (75) feet of Lot 16, all in Block 53, Kinzie's Addition to
Chicago, County of Cook and State of Illinois.
A more specific description of the said improvement is as follows:
Purpose:
The purpose of the improvement as a whole is to provide a thorough-
fare extending along North Michigan Avenue, as widened, from the north
curb line of East Randolph Street to the Chicago River, across the Chicago
River along Pine Street, as extended and widened, and along Lincoln Park-
way, as widened, from the Chicago River to the center line of East Chicago
Avenue,
Two Levels Thoroughfare:
The thoroughfare shall have an upper level extending over the entire
length of the improvement as above described, and supported between East
6
I
Lake Street and East Indiana Street upon an elevated structure of steel
and concrete, and a lower level extending from East Lake Street to the
north line of East Indiana Street. The southern limit of the said lower
level shall be a line beginning on the east line of the said thoroughfare
at the south line of East Lake Street, thence running west on said south
line of East Lake Street to a point 45 feet west of the said east line of the
thoroughfare, thence north along a line 45 feet west of and parallel with
the said east line of the thoroughfare to a point 113 feet north of the north
line of East Lake Street, thence west along a line 113 feet north of and
parallel with the said north line of East Lake Street to a point 25 feet east
of the west line of the said thoroughfare, thence south along a line 25
feet east of and parallel with the said west line of the thoroughfare, to the
north curb line of East Lake Street, thence west along the said north curb
line of East Lake Street to the west line of the said thoroughfare. The
location, grades and dimensions of the elevated structure, including the
bascule bridge and including all foundations to said structure shall be as
shown in the drawings numbered one to ninety-five hereto attached and
hereby '
made a part hereof. The said drawings are reduced photographic
reproductions of drawings on file in the office of the Board of Local Im-
provements of the City'of Chicago. Wherever in any of the said drawings
elevations are indicated, such elevations shall be measured in feet and
decimal parts of a foot above Chicago City Datum, except where the eleva-
tion is marked by a minus (-) sign, in which case the elevation shall be
measured in feet and decimal parts of a foot below Chicago City Datum.
Grades of Upper Level:
The grade of the top of the curbing and the top of the sidewalks at the
curb lines of the said upper level of said improvement shall be at an ele-
vation of 15.50 feet above Chicago City Datum at the north line of East
Randolph Street; thence it shall rise gradually to 16.50 feet above Chicago
City Datum at a point 211 feet north of the north line of East Randolph
Street; thence it shall rise gradually to 19.08 feet above Chicago City Datum
at the south line of East Lake Street; thence it shall rise gradually to 19.88
feet above Chicago City Datum at the north line of East Lake Street; thence
it shall rise gradually to 26.09 feet above Chicago City Datum at the south
line of East South Water street; thence it shall rise gradually. to 33.92
feet above Chicago City Datum at the scuth line of the South Plaza here-
inafter described; thence it shall rise gradually to 36.17 feet above Chicago
City Datum at a point 160 feet south of the center of the bascule bridge
herein described; thence it shall rise gradually to 37.08 feet above Chi-
cago City Datum at the center of the said bascule bridge; thence, it shall
fall gradually to 36.17 feet above Chicago City Datum at a point 160 feet
north of the center of the said bascule bridge; thence it shall fall gradually
to 33.87 feet above Chicago City Datum at the north line of the North
Plaza hereinafter described; thence it shall fall gradually co 29.87 feet
above Chicago City Datum at the north curb line of East Illinois Street;
thence it shall fall gradually to 24.00 feet aboùe Chicago City Datum at
the north curb line of East Indiana Street; thence it shall fall gradually to
16.00 feet above Chicago City Datum at the south curb line of East Ohio
Street; thence it shall continue level at 16.00 feet above Chicago City Daturn
to the north line of East Ohio Street; thence it shall fall gradually to 13.00
feet above Chicago City Datum at the south line of East Ontario Street;
thence it shall continue level at 13.00 feet above Chicago City Datum tó
the south curb line of East Chicago Avenue.
Grade of East Lake Street:
The grade of the top of the sidewalk at the curb line on each side of
7
East Lake Street at the east line of North Wabash Avenue shall be 15.00
feet above Chicago City Datum; thence it shall rise gradually to an eleva-
'tion of 17.50 feet above Chicago City Datum at the east line of the first
alley 'west of the proposed thoroughfare; thence it shall rise gradually to
the grade herein specified at the west curb line of the upper level of the
said thoroughfare.
Grade of East Ohio Street:
"Thė grade of the top of the curbing on each side of the present road-
way of East Ohio Street at the east line of Rush Street shall be at an ele-
vation of 13.0 feet above Chicago City Datum; thence it shall rise gradu-
ally to an elevation of 16.0 feet above Chicago City Datum at the west line
of the proposed thoroughfare; thence it shall continue level at an eleva-
tion of 16.0 feet above Chicago City Datum to the east line of the said
thoroughfare; thence it shall fall gradually to an elevation of 13.0 feet
above Chicago City Datum at the west line of. St. Clair Street.
Grade Lower Level:
The top of the pavement of the roadway of the lower level of the said
thoroughfare along the center line thereof at a point 156 feet north of the
north line of East Lake Street shall be at an elevation of 7.85 feet above
Chicago City Datum; thence it shall rise gradually to an elevation of 9.10
feet above Chicago City Datum at the center line of East South Water
Street; thence it shall rise gradually to an elevation of 14.00 feet above
Chicago City Datum at the south line of the South Plaza; thence it shall
rise gradually to an elevation of 16.00 feet above Chicago City Datum at a
Point 188 feet south of the center of the said bascule bridge; thence it
shall rise gradually to an elevation of 19.5 feet above Chicago City Datum
at a point 88 feet south of the center of the said bascule bridge; thence it
shall rise gradually to an elevation of 20.00 feet above Chicago City Datum
at the center of the said bascule bridge; thence it shall fall gradually to an
olevation of 19.5 feet above Chicago City Datum at a point 88 feet north of
the center of the said bascule bridge; thence it shall fall gradually to an
elevation of 16.00 feet above Chicago City Datum at a point 188 feet north
nf the center of the said bascule bridge; thence it shall fall gradually. to an
ulevation of 13.50 feet above Chicago City Datum at a point 50 feet south
of the center line of East North Water Street; thence it shall fall gradu-
ally to an elevation of 13.25 feet above Chicago City Datum at the center
line of East North Water Street; thence it shall continue level at an eleva-
tion of 13.25 feet above Chicago City Datum to the center line of East Illi-
nois Street; thence it shall fall gradually to an elevation of 8.00 feet above
Chicago City Datum at the center line of East Indiana Street.
Streets Connecting with Lower Level:
The lower level of the said thoroughfare shall be connected with East
Lake Street east of the thoroughfare and with each of the following named
sireets: East South Water Street, River Street, East North Water Street,
East Michigan Street, East Illinois Street and East Indiana Street in the
inanner hereinafter described.
Concrete Stairways:
A stairway of reinforced concrete shall be built so as to connect the
ripper level with the lower level of the proposed thoroughfare at each of
the following points: Southeast intersection of East Lake Street; the
southeast and the northwest intersections of South Water Street; the east
side of the upper level just south of the south line of the South Plaza;
southeast and northwest intersections of East Michigan Street; southeast
and northwest intersections of East Illinois Street; and the southeast and
!
7
8
northwest intersections of East Indiana Street. The said stairways shall
bo six feet in width and shall have risers of approximately six and one-
half inches in height and treads 11 inches in width. There shall be two
landings 5 feet in length intermediate between the top and the bottom of
the said stairways, and the lower landing shall be at the level of the ele-
vated sidewalk of the lower level, provided that where there is no such
clivated sidewalk adjacent thereto, there shall be one such landing.
The said stairways shall be located as shown on said drawings and the
said lower landing shall extend from the stairway to the elevated side-
walk on the corresponding side of the street, all as shown on said drawings.
Around the stairwell in the upper level there shall be a wrought iron
railing, similar to the hand railing on the upper level of the bridge herein
described, and on each side of the stairway there shall be an iron pipe rail-
ing, all as shown on said drawings.
lv idth of Walks and. Roadways-Upper Level:
The upper level from the north curb line of East Randolph Street to
a line 428.74 feet north of and parallel with the north line of East South
Wator Street shall have a concrete sidewalk 27.5 feet wide along and ad-
joining the west line of the thoroughfare (except across the roadway of
East Lake Street), and shall have a concrete sidewalk 25 feet wide along
ar:d adjoining the east line of the thoroughfare. Between the said side-
walks shall be a roadway 75 feet wide.
souch Plaza:
The said line 428.74 feet north of and parallel with the north line of
East South Water Street shall be the south line of that portion of the im-
prűvement herein designated as the “South Plaza”. The said South Plaza
sirall extend from the said line 428.74. feet north of and parallel with the
norili line of East South Water Street to the Chicago River over the lands
herein described as being taken for the purpose of widening North Michi-
gan Avenue and over the intervening pcrtions of North Michigan Avenue
and River Street, as shown on said drawings.
South Plaza-Upper Level:
The roadway of the upper level across the South Plaza shall expand
or merge into a space approximating in shape an oval having a minor axis
37 feet long measured along the center line of the bascule bridge herein
described and a major axis 252 feet long. At the foci of the oval there shall
be two islands approximating in shape cvals each 18 feet by 43 feet, with
axes parallel with the corresponding axes of the large oval, as shown on
said drawings.
The surface of the upper level of the said South Plaza not covered by
the roadway shall be covered with a concrete sidewalk. The elevation of
the surface of the pavement on the roadway and the elevation of the side-
walk on the said upper level of the South Plaza shall conform to the ele-
vations of the pavement and the sidewalks herein specified and as shown
on said drawings.
North Plaza:
That portion of the improvement hereinafter designated as the '“North
Plaza" shall extend from the dock line of the Chicago River as shown on
said drawings to a line 22 feet south of and parallel with the south line
of East Michigan Street over the lands herein described as being taken for
the purpose of extending and widening Pine Street, and over the interven-
ing portions of Pine Street and East North Water Street, as shown on said '
drawings.
9
&
North Plaza-Upper Level:
The roadway of the upper level across the North Plaza shall expand
or merge into a space approximating in shape an oval having a major axis
208 feet long measured along the center line of the bridge herein described
and a minor axis 163 feet long. On each side of the major axis there shall
be a safety island 21 feet by 54 feet and located 35 feet east and 36 feet
west of said major axis, as shown on said drawings.
The surface of the upper level of the said North Plaza not covered by
the roadway shall be covered with a concrete sidewalk. The elevation of
the surface of the pavement on the roadway and the elevation of the side-
walk on the said upper level of the North Plaza shall conform to the ele-
vations of the pavement and the sidewalks herein specified, and as shown
on said drawings.
Iridth of Walk and Roadway-Upper Level:
The upper level of the thoroughfare from the north line of the North
Plaza to the south curb line of East Ohio Street shall have a concrete side-
walk 30.5 i'eet in width, along and adjoining each side of the said thorough-
fare. Between the said sidewalks there shall be a roadway 80 feet wide.
The upper level of the thoroughfare from the north curb line of East
Ohio Street to the south curb line of East Chicago Avenue (except across
the roadways of intersecting streets and except across the alleys between
East Ohio Street and East Erie Street) shall have a concrete sidewalk 12
feet wide, along and adjoining each side of the said thoroughfare. There
shall be parkways between the said sidewalks and the curb lines of the
said upper level, which curb lines shall be located 30.5 feet from and
parallel with the side lines of said thoroughfare. Between the said curb
lines there shall be a roadway 80 feet wide. The thickness of the concrete
curbing which shall be placed between the parkways and the roadway
shall be included in the width of the parkways.
Width of Roadway and Walks-Lower Level:
The lower level of the thoroughfare from the south line of East Lake
Street to a line 129 feet north of and parallel with the north line of East
Lake Street shall extend along and adjoining the east side of the thorough-
fare with a width of 45 feet, having a concrete sidewalk 3 feet 10 inches
wide adjoining the property on the east side and a roadway 41 feet 2 inches
wide. On the west side of the thoroughfare from the north curb line of East
Lake Street to a line 129 feet north of and parallel therewith, the lower
level shall consist of a concrete sidewalk 25 feet wide, adjoining the west
line of the thoroughfare.
From the said line 129 feet north of and parallel with the north line
of East Lake Street to the south line of the South Plaza the lower level of
the thoroughfare (excepting at intersecting streets and alleys) shall have
a concrete sidewalk 7 feet 10 inches wide along and adjoining each side of
the said thoroughfare, except that on the east side of the thoroughfare
south of the first alley north of East Lake Street the sidewalk shall be 3
feet 10 inches wide. Between the said sidewalks there shall be a roadway,
except where other construction is hereby specified.
South Plaza-Lower Level:
On the lower level of the South Plaza a concrete sidewalk 7 feet 10
inches wide shall be built along the south line thereof from the west line
of the South Plaza to a point 7 feet 10 inches east of the west line of the
tiioroughfare extended from the south and from a point 7 feet 10 inches
west of the east line of the thoroughfare extended from the south to a
10.
point 60 feet east of the said east line. The elevation of the top of the
said walk at the west line of the South Plaza shall be 15.3 feet above Chi-
cago City Datum and thence it shall have a uniform grade to the eleva-
tion of the sidewalk herein specified at the west side of the thoroughfare
south of the South Plaza. At the east side of the thoroughfare the said
walk shall be at the same elevation as is herein specified for the walk ex-
tending from the south at that point, thence it shall have a uniform grade
to its eastern terminus, where it shall have an elevation of 16 feet above
Chicago City Datum.
A concrete sidewalk shall be built, over all of that portion of the lower
level of the South Plaza, except the roadway of the bridge, lying between
the inner abutment wall (herein specified) and the retaining wall which
is herein specified to be built to connect with the south wall of the ma-
chinery room.
The elevation of the said sidewalk along the southern edge shall be
15.5 feet above Chicago City Datum at its western terminus, thence it shall
rise gradually to an elevation of 16.5. feet at the roadway of the bridge,
thence it shall rise gradually to an elevation of 17.0 feet above :Chicago
City Datum at its eastern terminus. Transversely the sidewalk shall rise
gradually from its southern edge to an elevation of 17.0 feet above Chicago
City Datum at the inner abutment wall.
The roadways of the lower level of the South Plaza shall extend over
all of the said lower level except the space covered by the said sidewalks
and other construction herein specified.
North Plaza---Lower Level:
On the lower level of the North Plaza concrete sidewalks 9 feet and
4 inches in width shall be built along and adjoining the property lines on
each side of the North Plaza, except on the east side of the thoroughfare
between East North Water Street and East Michigan Street. The elevation
of the top of the said sidewalk along the westerly side of the lower level
from East Michigan Street to East North Water Street shall be 16.50 feet
above Chicago City Datum. The elevation of the top of the said walk at
the south line of East North Water Street shall be 16.25 feet above Chicago
City Datum, thence it shall rise uniformly to, an elevation of 17.0 feet above
Chicago City Datum at its southern terminus at the abutment wall herein
described. The elevation of the top of the said sidewalk on the easterly
side of the lower level at the south line of East North Water Street shall be
15.75 feet above Chicago City Datum; thence it shall rise uniformly to an
elevation of 17.0 feet above Chicago City Datum at its southern terminus
at the abutment wall herein described.
A concrete sidewalk shall be built over all of that portion of the
lower level of the North Plaza, except the roadway of the bridge, lying
between the inner abutment wall herein described, and the inner retaining
wall which is herein specified to be built to connect with the north wall
of the machinery room.
The elevation of the north edge of the said
walk shall be 17.0 feet above Chicago City Datum at its westerly end;
thence it shall slope gradually to an elevation of 16.5 feet above Chicago
City Datum at each side of the roadway of the bridge, thence it shall rise
gradually to an elevation of 17.0 at its easterly end. Transversely the
walk shall rise gradually to an elevation of 17.0 feet above-Chicago City
Datum at the inner abutment wall.
A concrete sidewalk shall be built to connect the walk-last described
and the walk herein provided to be built along the easterly side of the
said lower level. The northwesterly edge of the said connecting walk
11
shall be along a straight line 10 feet from and parallel with the easterly
portion of the inner abutment wall. The elevation of the top of the said
walk shall be 17.0 feet above Chicago City Datum.
A concrete sidewalk 10 feet in width shall be built on each side of the
center line of the bridge extended and 39 feet distant therefrom and parallel
thereto from the southerly line of East North Water Street to, a line 93
feet north of parallel with the center line of the north trunnions, thence the
said walks shall extend to the north wall of the machinery room, herein
described and the inner edges of the walks shall converge so that they
shall coincide with the curb lines of the lower level of the bridge at the
north end thereof.
The elevation of the top of the said walks shall be 13.0 feet above Chi-
cago City Datum at the south line of East North Water street; thence they
shall rise gradually to an elevation of 16.5 feet at the north line of the
machinery room.
A concrete sidewalk shall be built between the east side line of the
said lower level and the corresponding curb llne of the upper level pro-
jected down on the lower level and between the south curb line of East
Michigan Street and the north line of East North Water street. The
elevation of the top of the said walk shall conform to the grade of the
curb of East Michigan Street as herein specified and thence shall slope
gradually to an elevation of 13.0 feet above Chicago City Datum at the
north line of North Water street.
The roadways of the lower level of the North Plaza shall extend over
all of the said lower level except the space covered by the sidewalks and
other construction herein specified.
Width of Roadways and Walks--Lower Level:
From the north line of the North Plaza to the south line of East In-
diana Street (except on the east side of the thoroughfare between East
North Water Street and East Michigan Street and excepting at intersecting
streets and alleys) the lower level of the thoroughfare shall have a con-
crete sidewalk 9 feet 4 inches wide along and adjoining each side thereof,
and between the said sidewalks there shall be a roadway.
A concrete sidewalk 16 feet in width shall extend across the south end
of the lower level (excepting across the roadway 45 feet wide herein de-
scribed). The north edge of said walk shall be on a line 129 feet north of
and parallel with the north line of East Lake Street.
At the intersection of the lower level with East Lake Street a concreté
sidewalk on the south side of said East Lake Street shall extend from the
side line to the corresponding curb line of said East Lake Street and from
the east side line of the said thoroughfare to the wall under the east curb
line of the upper level.
Walks at Intersections of Lower Level:
Except where otherwise specified or shown in said drawings, concrete
sidewalks shall be constructed on each side of the lower level at each in-
tersecting street in the spaces between the side lines of the thoroughfare
and the corresponding curb lines of the upper level, projected down on the
lower level, and between the side lines and the corresponding curb lines
of the intersecting streets. Concrete curbing shall be set between the said
sidewalks and the adjoining pavements. The top of the said sidewalks
shall conform to the grade of the adjoining curbing of the intersecting
streets as herein specified.
)
12
Transverse Grades-Upper Level:
The surface of the sidewalks and parkways on the said upper level
shall rise transversely from the grade of the curb lines to the side lines of
the improvement at the rate of two percentum, except on the Plazas and on
the bridge, where the elevations of the said sidewalks shall be as shown
on said drawings.
The surface of the pavement on the upper level from East Randolph
Street to East Ontario Street (except on the bridge and at streets intersect-
ing the upper level) adjacent to the curb lines shall be six inches below the
top of the sidewalks.
Two lines of curbing, one adjoining each side of the roadway, shall be
set on the upper level from the south line of East Ohio Street to the south
curb line of East Chicago Avenue as herein located, except across the road-
ways of intersecting streets and except across the alleys between East Ohio
Street and East Erie Street. The top of the curbing shall be at the grade
herein specified between said points.
From East Ontario Street to East Chicago Avenue on the upper level
the surface of the pavement adjacent to the side curbing shall be 9 inches
below the top of the said curbing at the inlets to the sewer catchbasins
(herein provided for) and shall be 4 inches below the top of the said curb-
ing at the summits in the gutters half way between the said inlets. The
grade of the gutters shall be straight lines between the points herein es-
tablished.
The pavement of the upper level from East Randolph. Street to the
south line of the South Plaza between the curb lines shall have a rounded
surface with the crown in the center of the pavement at an elevation of 3
inches above the elevation of the sidewalk at the curb line.
The pavement of the upper level from the north line of the North
Plaza to the center line of East Chicago Avenue between the curb lines
shall have a rounded surface with the crown in the center of the pavement
at an elevation of 4 inches above the elevation of the curbing or sidewalk
at the curb line.
Transverse Grades-Lower Level:
The pavement of the roadway of the said lower level (except across
the roadways of intersecting streets, and except across the South and North
Plazes and the bascule bridge) shall be shaped so as to form a gutter along
lines under the curb lines of the upper level. The elevation of the top of
the pavement along the said gutter lines shall be 9 inches lower than the
top of the pavement along the center line of the said roadway as herein-
before specified. The surface of the pavement of the said lower level shal]
he rounded between the gutter lines; and from the gutter lines it shall rise
gradually to the side lines of the roadway, where it shall be at an elevation
three inches below the surface of the pavement along the center line of
the roadway as hereinbefore specified.
The pavement on that portion of the roadway of the lower level be-
tween the south line of East Lake Street and a line 129 feet north of the
north line of said East Lake Street shall be shaped so as to form a gutter
along a line under the curb line on the east side of the upper level. The
top of the pavement along the said gutter line shall be at an elevation of
7.00 feet above Chicago City Datum at the inlets to the sewer catchbasins
herein provided for, and shall be at an elevation of 7.30 feet above Chicago
City Datum at the summits in the gutter half way between the said inlets.
The surface of the said pavement shall rise from the gutter line to the side
13
A
lines of the livadway where it shall be at an elevation of 7.60 feet above
Chicago City Datum.
Elevation of Walks-Lower Level:
The top of the sidewalks on each side of the lower level from East
South Water Street to the south line of the South Plaza and from East
Michigan Street to East Indiana Street (excepting across intersecting
streets and alleys) shall be 3 feet 6 inches above the top of the pavement
along the center line of the lower level as above specified, provided that at
each intersecting street and alley the said sidewalk shall be connected with
the lower sidewalk at the street and the pavement at the alley by means of
a stairway with seven risers.
Retaining Walls at East Lake Street:,
A concrete retaining wall shall be constructed under the edge of the
sidewalk and along the curb line on the west side of the said upper level
from the north curb line of East Randolph Street to the south curb line of
East Lake Street.
A concrete retaining wall shall be constructed under the edge of the
sidewalk and along the curb line on the east side of the said upper level
from the north curb line of East Randolph Street to the south line of
East Lake Street, thence it shall be constructed along the southern limits
of the lower level as herein described to the north curb line of East Lake
Street at a point 25 feet east of the west line of the said thoroughfare.
A concrete retaining wall shall be built along the north curb line
of East Randolph Street from the side lines of the said thoroughfare
to the corresponding curb lines of the upper level.
A concrete retaining wall shall be constructed under the edge of the
sidewalk and along the curb line on each side of East Lake Street from
the east line of North Wabash Avenue to the west curb line of the upper
level of the said thoroughfare, except across the alleys where the wall:
shall be returned to the side lines of said East Lake Street.
Filling and Paving South of East Lake Street:
The space between the retaining walls herein provided for below
the upper level of the thoroughfare from the north curb line of East
Randolph Street to a line 113 feet north of and parallel with the north line
of East Lake street shall be filled with earth which shall be thoroughly
compacted. Upon the compacted filling shall be placed a layer of concrete
eight inches in depth, the top surface of which shall be at the proper ele-
vation to receive the asphaltic pavement herein described which shall
be placed thereon.
Filling and Paving East Lake Street:
Between the curb walls on East Lake Street from the east line of North
Wabash Avenue to the west curb line of the thoroughfare and between
the returned walls at the alley intersections filling shall be placed and
compacted and upon the filling shall be placed a layer of concrete eight
inches in depth, the upper surface of which shall be at the proper eleva-
tion to receive the asphaltic pavement herein described which shall be
placed thereon.
Walks South of East Lake Street:
A sidewalk composed of steel and concrete shall be laid along and
adjoining each side of the said thoroughfare from the north curb line
of East Randolph Street to the south curb line of East Lake street and
supported by the retaining walls herein described and by an 18-inch I-beam
14
which shall be supported on steel columns encased in concrete and located
14 feet apart center to center along a line 7 feet from and parallel with
the side line of the said thoroughfare, all as shown in said drawings.
Location of Steel Columns:
That portion of the upper level which is directly over the lower level
as herein described shall consist of and be supported by a structure of
steel and concrete. Between the south end of the lower level and the
south line of East South Water street there shall be a row of steel columns
located along a line 7 feet from and parallel with the west side line of the.
thoroughfare. There shall be a row of columns under each curb line of the
upper level, and there shall be two rows between the said curb lines spaced
at equal distances between the curb lines. From the north line of East
Lake street to the first alley north thereof there shall be a row of. steel col-
umn's located along a line 3 feet from and parallel with the east side line
of the thoroughfare, and from the said alley to the south line of East
South Water Street there shall be a row of steel columns "located along a
line 7 feet from and parallel with the east side line of the thoroughfare.
From the south curb line of East Lake street to a point 113 feet north of
the north line of East Laké street there shall be 10 columns under the east
curb of the upper level. From the north line of East Lake Street to a point
113 feet north thereof there shall be 7 columns located along the east,
side of the said lower level, and there shall be 6 columns located along the
west line of the said lower level. From the point 113 feet north of East
Take street to the south line of East South Water Street, there shall be
8 columns in each of the rows hereinbefore provided, and the columns
shall be spaced at approximately equal distances so as to form lines trans-
versely to the thoroughfare, provided that at expansion joints which are
herein located and described there shall be two lines of columns spaced 2.20
feet apart, center to center.
At East Lake street there shall be ſive columns on the east line of the
proposed thoroughfare. At East South Water Street there sħall be six
columns along cach curb line of the said East South Water Street. From
the north line of East South Water Street to the south line of the South
Plaza there shall be a row of columns along each side of the lower level
7 feet from and parallel with each side of the said thoroughfare. There
shall be a row under each curb line of the upper level and there shall be
one row along the center line of the thoroughfare. There shall be 18
columns in each of the said rows, and they shall be spaced at approximately
equal distances so as to form straight lines transversely to the thorough-
fare, provided that at expansion joints which are herein described and lo-
cated there shall be two lines of columns spaced 2.20 feet apart, center to
center. In the South Plaza there shall be 69 columns which shall be located
as shown on said drawings hereto attached. In the North Plaza there shall
be 86 columns which shall be located as shown on the said drawings hereto
attached. From a line 22 feet south of the south line of East Michigan
Street to the south line of East Indiana Street, excepting at the intersec-
tions of East Michigan Street and East Illinois Street, there shall be a row
of (olumns 8 feet from and parallel with each side line of the said thor-
oughfare, a row of columns under each curb line of the upper level, and
a l'ow of columns along the center line of the thoroughfare. There shall
be 12. columns in each row between the said line 22 feet south of the
south line of East Michigan Street and East Illinois Street, and 10 columns
in each row between East Illinois Street and East Indiana Street, and they
shall be spaced at approximately equal distances so as to form lines trans-
versely to the thoroughfare, provided that at expansion joints which are
15
herein described and located there shall be two lines of columns spaced 2.20
feet apart, center to center. At the intersections of each of East Michigan
Street, East Illinois Street and East Indiana Street, there shall be five
columns along each curh line and at East Indiana Street there shall be in
addition five columns along the center line of the said street.
Dimensions of Columns and Foundations:
The said steel columns shall be of the dimensions shown on said draw-
ings and shall be encased in concrete of the quality herein described as
Class B in which shall be incorporated steel rods, all as shown in said
drawings.
Each steel column shall rest upon a cast iron plate which in turn
shall rest upon a foundation of concrete of the quality herein described as
Class A. The dimensions and elevations of the said cast iron plate and con-
crete foundations shall be as shown on said drawings.
Cast Iron Wheel Guards:
The bottom of all columns herein: located in the roadways of the
lower level shall be prolected by, cast iron wheel guards. The top of each
wheel guard shall be 12 inches high above the adjacent pavement and
extend 8 inches beyond the sides of the said columns, all as shown in
said drawings.
Girders and I-Beams:
Steel girders shall be constructed and connected with the said columns
and with each other and steel I-beams shall be connected with the said
girders in such manner as to form a frame work of structural steel cov-,
ering the entire space over the lower level, except that at points herein
specified, openings shall be let for stairways leading from the upper level
to the lower level. The said system of girders and I-beams shall also
be supported by retaining walls herein described. Concrete shall be placed
between and around all of the members of the steel structure in such a
manner as to encase, all of the steel with concrete with a minimum thick-
ness between the steel and the outer surface of the concrete of two inches,
and to form a continuous roof over the lower level. The upper surface of
the concrete, when finished as herein described, shall form the upper
surface of the sidewalk, the faces of the curbing and the base for the
asphaltic pavement herein described.
The location, grades and dimensions of all girders and beams and of all
concrele in connection therewith shall be as shown on said drawings. The
said elevated structure and all its parts shall have sufficient strength to
bear safely in addition to the weight of the structure two moving vehicles
in juxtaposition on the roadway, each vehicle having a weight of 5 tons
on cach.of 4 wheels spaced 5 feet apart in one direction and 10 feet apart
in the other direction, each vehicle occupying a space 10 feet by 20 feet,
and the surrounding space over the entire structure, including sidewalks
bearing a uniformly distributed load of 100 pounds per square foot.
Expansion Joints:
Transverse expansion joints shall be provided in the said elevated
structure, and located as shown in said drawings. At each expansion
joint shall be two bents consisting of steel columns and girders independ-
ent of each other but supported on a single row of concrete foundations.
There shall be a clear space of one inch between the surfaces of the con-
crete enclosing the girders. This space for a distance of two inches from the
top of the struclure shall be filled with a soft asphaltic mixture whiclı
16
shall be supported by sliding steel plates attached to the girders, as shown
in said drawings.
Glass Sidewall Lights:
Glass sidewalk lights shall be set in the sidewalks herein specified as
follows: A strip four feet wide one foot from and parallel with the prop-
crty lines of East Lake Street from the east line of North Wabash Avenue
to the west line of the proposed thoroughfare; a strip five feet wide one
foot from and parallel with the property lines on each side of the thor-
oughfare from East Randolph Street to the South Plaza; a strip five feet
wide one foot from and parallel with the property lines on each side of
the thoroughfare from the north line of East Michigan Street to the south
line of East Ohio Street; a strip six feet wide two feet from and parallel
with the curb lines on each side of the thoroughfare from the north line
of East Lake Street to the south line of the South Plaza, except the intersec-
tion of East South Water Street and except the space over the stairways
herein described; a strip six feet wide two feet from and parallel with the
curb line of the said thoroughfare from the north line of East Michigan
Street to the south line of East Indiana Street and except the space over the
stairways herein described, except the intersection of East Illinois Street.
Two thousand six hundred fourteen square feet of glass sidewalk lights
shall be placed at necessary points in the sidewalks of the upper level of
the South Plaza, and 5,168 square feet of glass sidewalks lights shall be
placed at necessary points in the sidewalk space of the upper level of the
North Plaza.
Balustrades at Street Intersections:
At all street and alley intersections, except at River. Street and at East
North Water Street, there shall be architectural piers and architraves of
terra cotta herein described and balustrades of Bedford limestone, herein
described, all securely fastened to the steel work and backed up with con-
crete, all as shown an said drawings.
At River Street, on the west side of the Plaza, there shall be archi-
tectural piers, architraves and balustrades of Bedford limestone, herein
described, and on the east side of the Plaza there shall be architectural
piers of dressed granite, herein described, up to an elevation of 16.3.fcet
above Chicago City Datum, and above this elevation the piers, architraves
and balustrades shall be of Bedford limestone herein described. These
architectural piers, architraves and balustrades shall be constructed as
shown on said drawings and shall be securely fastened to the steel work
and backed up with concrete.
Soflits and balustrades shall be level across all intersecting streets and
alleys.
At East Lake Street the elevation of the soffit at the center line of the
street shall be 17.7 feet above Chicago City Datum, and the elevation of
the top of the balustrade shall be 24.61 feet above Chicago City Datum. At
Icast South Water Street the elevation of the soffit's shall be 24.0 feet above
Chicago City Datum, and the elevation of the tops of the balustrade shall
be 30.91 feet above Chicago City Datum. At East Michigan Street the ele-
vation of the soffits shall be 29.0 feet above Chicago City Datum and the
elevation of the tops of the balustrades shall be 37.0 feet above Chicago'
City Datum. At East Illinois Street the elevation of the soflits shall be
26.0 feet above Chicago City Datum and the elevation of the tops of the
balustrades shall be 34.0 feet above Chicago City Datum. At East Indiana
Street the elevation of the soffits shall be 22.0 feet above Chicago City
Datum and the elevation of the tops of the balustrades shall be 28.91 feet
17
above Chicago City Datum. At the alley between East Lake Street and
East South Water Street the elevation of the soffit shall be 20.59 feet above
Chicago City Datum and the top of the balustrade 27.51 feet above Chi-
cago City Datum. At the alley on the east side of the thoroughfare be-
tween East South Water Street and the South Plaza, the elevation of the
soffit shall be 26.58 feet above Chicago City Datum and the elevation of
the top of the balustrade shall be 33.50 feet above Chicago City Datum. At
the alley on the west side of the thoroughfare between East South Water
Street and the South Plaza, the elevation of the soffit shall be 29.54 féet
above Chicago City Datum and the elevation of the top of the balustrate
shall be 26.46 feet above Chicago City Datum. At the alley between East
Michigan Street and East Illinois Street the elevation of the soffit shall be
28.99 feet above Chicago City Datum and the elevation of the tops of the
balustrades shall be 35.91 feet above Chicago City Datum. On the east side
of the thoroughfare at the alley between East Indiana Street and East Illi-
nois Street, the elevation of the soffits shall be 23.68 feet above Chicago
City Datum, and the elevation of the tops of the balustrades shall be 30.60
feet above Chicago City Datum. On the west side of the thoroughfare at
the alley between East Indiana Street and East Ohio Street, the elevation
of the soffit shall be 17.39 feet above Chicago City Datum, and the eleva-
tion of the top of the balustrade shall be 24.31 feet above Chicago City
Datum. At all street and alley intersections the cornice of the structure
of the upper level shall project 3 feet 9 inches beyond the line of the thor-
oughfare, and the line of the lowest step along the balustrade at said in-
tersections shall project 9 inches'inside the line of the thoroughfare.
Walls North of East Indiana Street:
A concrete retaining wall shall be constructed under the upper level
along the north line of East Indiana Street from the curb line to the curb
line of the upper level of the said thoroughfare, projected down on the
lower level.
A concrete retaining wall shall be constructel under the edge of the
sidewalk and along the curb line on each side of the said upper level from
the south line of East Ohio Street to the north line of East Indiana Street.
A concrete retaining wall shall be built along the south line of East
Ohio Street from the side lines of the thoroughfare to the corresponding
curb lines of the upper level.
Walks-East Indiana Street to East Ohio Street:
A sidewalk composed of steel and concrete shall be laid along and ad-
joining each side of the said thoroughfare from the north line of East In-
diana Street to the south line of East Ohio Street and supported by the re-
taining walls herein described and by an 18-inch I-beam, which shall be
supported on steel columns encased in concrete and located 14 feet apart
center to center along a line 8 feet 6 inches from and parallel with the side
line of the said thoroughfare, all as shown in said drawings.
Curbing on East Ohio Street:
Two lines of concrete curbing, one on each side of the present roadway
shall be set on East Ohio Street from the east line of Rush Street to the
west line of St. Clair Street, except across intersecting alleys and roadway.
Fill and Pave from East Indiana Street to East Ohio Street:
The space between the retaining walls and the curbing herein pro-
vided for below the upper level of the thoroughfare from the north line
of East Indiana Street to the south curb line of East Ohio Street shall be
filled with earth which shall be thoroughly compacted. Upon the com-
}
18
pacted filling shall be placed a layer of concrete eight inches in depth, the
top surface of which shall be at the proper elevation to receive the asphal-
tic pavement herein described, which shall be placed thereon.
l'ill and Pave East Ohio Street:
The roadway of East Ohio Street from the east line of Rush Street to
the west line of St. Clair Street, including alley returns, shall be graded by
excavation or by filling, as may be necessary, and the surface of the graded
roadbed, when compacted, shall be covered with a layer of concrete eight
inches in depth, the top of which shall be at the proper elevation to re-
ceive the asphaltic pavement herein specified, which shall be placed
thereon.
Hill and Pave North of East Ohio Street:
The roadway of the said thoroughfare from the north curb line of
East Ohio Street to the center line of East Chicago Avenue, and the road-
ways of all intersecting streets and alleys within the limits of the said
thoroughfare shall be graded by excavation or filling, as may be required,
and the surface of the roadways compacted, and upon this shall be placed
a layer of concrete eight inches in depth, the top surface of which shall
be at the proper elevation to receive the asphaltic pavement herein de-
scribed, which shall be placed thereon.
Curbing at Intersection of East Lake Street:
A line of concrete curbing shall be set on each side of the present road-
way of East Lake Street from the west line of Beaubien Court to the east
line of the proposed thoroughfare. The top of the curbing at the east line
of the said thoroughfare shall be 7.70 feet above Chicago City Datum, and
thence shall rise to an elevation of 9.5 feet above Chicago City Datum at
the west line of Beaubien Court.
Curbing at Intersection of East South Water Street:
A line of concrete curbing shall be set on each side of the present
roadway of East South Water Street from the east line of the first alley
west of North Michigan Avenue to the west line of Beaubien Court, except
across the roadway of the lower level. The top of the curbing at the east
line of the said first alley west of North Michigan Avenue shall be at an
elevation of 14.00 feet above Chicago City Datum, and shall fall gradually
to an elevation of 9.2 feet above Chicago City Datum at the west curb line
of the upper level of the said thoroughfare projected down on the lower
level. From the east curb line of the upper level projected downward to
the west line of Beaubien Court the top of the said curbing shall be at an
elevation of 9.1 feet above Chicago City Datum.
Curbing at Intersection of East Michigan Street and East Illinois Street:
A line of concrete curbing shall be set on each side of the roadways, of
East Michigan Street and East Illinois Street 19 feet from and parallel with
the center line thereof, from the side lines of the proposed thoroughfare to
the respective curb lines of the upper level, projected down on the lower
level. The top of the curbing in each case at the side lines of the thorough-
fare shall be 14.00 feet above Chicago Citý Datum; thence it. shall fall grad-
ually to an elevation of 13.25 feet above Chicago City Datum at the curb
lines of the upper level, projected down on the lower level.
Curbing at East Indiana Street:
A line of concrete curbing shall be set on each side of East Indiana
Street 15 feet from and parallel with the corresponding side line thereof
from the east line of Rush Street to the west line of St. Clair Street (ex-
1
19
cept across the alley and across the roadway of the lower level along the
south curb line). The top of the curbing at the east line of Rush Street
shall be at an elevation of 13.00 feet above Chicago City Datum; thence it
shall fall gradually to an elevation of 8.50 feet above Chicago City Datum
at the west side line of the proposed thoroughfare; thence it shall fall
gradually to an elevation of 8.0 feet above Chicago City Datum at the west
curb line of the upper level of the said thoroughfare, projected down on
the lower level; thence it shall continue level at an elevation of 8.0 feet
above Chicago City Datum to the east curb line of the said upper level,
projected down on the lower level; thence it shall rise gradually to an ele-
vation of 8.50 feet above Chicago City Datum at the east line of the said
thoroughfare; thence it shall rise gradually to an elevation of 13.00 feet
above Chicago City Datum at the west line of St. Clair Street,
Curbing at Intersections North of East Ohio Street:
A line of concrete curbing shall be set along each side of the road-
way of each intersecting street from East Ohio Street to and including
the south curb line of East Chicago Avenue, and along each side of each
alley between East Ohio Street and East Erie Street. The said lines
of curbing shall extend from the side lines of the proposed thorough-
. fare to the corresponding curb lines of the said thoroughfare as herein
described.
Transverse Grade-East Lake Street:
The surface of the sidewalk on each side of East Lake Street shall rise
transversely from the grade at the curb lines to the side lines at the rate
of three per centum.
The surface of the pavement of East Lake Street from the east line
of North Wabash Avenue to the west curb line of the upper level of the
proposed thoroughfare adjacent to the curb line shall be 6 inches below
the top of the curbing. The said pavement between the curb lines shall
be rounded with a crown along the center of the said East Lake Street
at an elevation equal to the average elevation of the curbing on each side
thereof.
Transverse Grade-East South Water Street:
The surface of the pavement of East South Water Street at the west
line of the first alley west of the proposed thoroughfare shall be at the
elevation of the existing pavement, and from the east line of the said alley
to the west line of Beaubien Court the surface of the pavement adjacent
to the curbing shall be 6 inches below the top of the curbing, except where
the curbing is on a level grade, when the pavement shall be 4 inches below
the curbing at summits and 9 inches below the curbing at the inlets to the
catchbasins, and between the curb lines it shall have a rounded surface
with a crown along the center line of said East South Water Street level
with the top of the said curbing.
Transverse Grade-East Michigan Street:
The surface of the pavement of East Michigan Street between the
side lines of the lower level of the thoroughfare adjacent to the curbing
shall be 6 inches below the top of the said curbing. The surface of the
said pavement between the curb lines shall be rounded with a crown
along the center line of the said East Michigan Street level with the top
of the curbing.
; Transverse Grade-East Illinois Street:
The surface of the pavement of East Illinois Street between the side
lines of the lower level of the thoroughfare adjacent to the curbing shall
!
20
)
be 6 inches below the top of the said curbing. The surface of the said
pavement between the curb lines shall be rounded with a crown along
the center of the said East Illinois Street level with the top of the curbing.
Transverse Grade-East Indiana Street:
The surface of the pavement on East Indiana Street from the east line
of Rush Street to the west line of St. Clair Street adjacent to the curbing
shall be 6 inches below the top of the said curbing. The said pavement
on each side of the street railway right-of-way shall be level with the top
of the said curbing. Between the curb lines and the said street railway
right-of-way the surface of the said pavement shall be rounded.
Transverse Grade-East Ohio Street:
The surface of the pavement on East Ohio Street from the east line
of Rush Street to the west line of St. Clair Street, except across the said.
thoroughfare, adjacent to the curbing shall be 6 inches below the top of
the said curbing. The said pavement between the curb lines shall have
a rounded surface with a crown along the center line of the said East
Ohio Street level with the top of the curbing.
Transverse Grade-North of East Ohio Street:
The surface of the pavement of the intersections of the thorough-
fare with the roadways of all streets, including the south half of East
Chicago Avenue, not otherwise herein specified, where the said pavement
is adjacent to the curbing, shall be 9 inches below the top of the curbing
at the inlets to the catchbasins and 4 inches below the top of the said
curbing at summits between the inlets. Between the curb lines the
pavement shall have a rounded surface with a crown along the center
line of the said roadways level with the top of the curbing.
Transverse Grade-Alleys:
The surface of the pavement of the interseclions of the thoroughfare
with the alleys on each side of the thoroughfare between East Ohio Street
and East Erie Street shall be at the elevation herein provided for the
pavement of the said thoroughfare at the curb line, and thence shall rise
at the rate of three per centum to the side lines of the said thoroughfare.
Walks on East Lake Street:
A sidewalk composed of concrete and steel shall be laid along and
adjoining each side of East Lake Street and supported by the retaining
wall herein described and by an 18-inch I-beam, which shall be supported
on steel columns encased in concrete and located 20 feet from center to
center along a line 5 feet from and parallel with the side line of the
said East Lake Street from the east line of North Wabash Avenue to the
west line of the proposed thoroughfare, except across alleys.
A concrete sidewalk 16 feet wide shall be laid along and adjoining
cach side of East Lake Street from the east line of the proposed thor-
oughfare to the west line of Beaubien Court. The top of the said side-
walk adjoining the curbing shall be at the grade herein specified for
the curbing, thence it shall rise transeversely at the rate of 3 per centum.
Walks on East South Water Street:
A concrete sidewalk 14 feet in width shall be laid along and adjoin-
ing each side of East South Water Street from the west line of the
proposed thoroughfare to the east line of the first alley west thereof, and
from the east line of the said thoroughfare to the west line of Beaubien
Court. The top of the sidewalk adjoining the curbing shall be at the grade
21
1
herein specified for the curbing, thence it shall rise transversely at the
rate of 3 per centum.
Walks on East Indiana Street:
A concrete sidewalk shall be laid along and adjoining the curbing
herein provided for on East Indiana Street from the east line of Rush
Street to the west line of St. Clair Street. The sidewalk shall be 8
feet wide, except across the proposed thoroughfare, where it shall extend
from the curbing to the side lines of the said East Indiana Street. The
top of the sidewalk adjoining the curbing shall be at the grade herein
specified for the curbing, thence it shall rise transversely at the rate of
3 per centum.
Walks on East Ohio Street:
A concrete sidewalk 8 feet in width shall be laid along and adjoining
each side of East Ohio Street from the east line of Rush Street to the west
line of St. Clair Street, except across alleys and across the thoroughfare.
Between the sidewalk and the curbing there shall be a parkway. The top
of the said sidewalk and parkway shall conform to the grade herein speci-
fied for the curbing, from which it shall rise transversely at the rate of
three per centum.
Walks North of East Ohio Street:
A concrete sidewalk 8 feet in width shall be laid along and adjoining
each side line of each intersecting street from East Chicago Avenue to
and including East Ohio Street between the sidewalks hereinbefore pro-
vided, and the curb lines of the said thoroughfare. The said walks shall
be at the elevation herein specified.
Walks on East Chicago Avenue:
A concrete sidewalk 10 feet in width shall be laid along and adjoin-
ing the south side line of East Chicago Avenue between the sidewalk
herein provided along each side of the thoroughfare and the curb lines
of the said thoroughfare. The top of the said sidewalk shall be at
the elevation herein specified.
Grade for Walks:
On the upper level of the thoroughfare between East Ohio Street
and the south curb line of East Chicago Avenue, on East Ohio Street and
on East Indiana Street between Rush Street and St. Clair Street, on Cast
South Water Street between Beaubien Court and the first alley west of the
proposed thoroughfare, and on all streets intersecting the lower level of
the thoroughfare between the side lines of the thoroughfara (excepting
all roadways) the spaces between the curb lines and the corresponding
side lines of the respective thoroughfare and streets shall be graded by
excavating or filling, as may be necessary, and the surface when com-
pacted brought to the proper grade to receive the sidewalks and cinder
foundations herein specified. When no such sidewalki is specified, the
spaces shall be brought to the grade of the curb and sidewalk, provided
that in such spaces, or parkways, the top twelve inches of the earth
shall be soil suitable for vegetation.
Walls Under Walks at Property Line:
Where any sidewalk is provided by this ordinance to be built on
filling adjoining private land, and the surface of such land is more than
one foot below the surface of the said sidewalk, a concrete retaining
wall shall be built under the said sidewalk and adjoining the private land.
The sidewalk shall rest upon the said retaining wall, which shall be six
7
1
22
inches thick at the top. The bottom of the wall shall have a thickness
equal to one-third the height of the wall, provided that in no case shall
it be less than twelve inches. The face of the wall next to the said land
shall be vertical, and the bottom of the wall shall be at the elevation
of the -said land.
Elevated Walks of Lower Level:
Each elevated sidewalk herein provided to be constructed along the
sides of the lower level between East Lake Street and East North Water
Street shall be supported on the roadway side by a concrete wall 9 inches
in thickness (, the bottom of which shall be at the elevation of the bottom
of the concrete foundation of the adjacent pavement and shall rest on a
footing course 24 inches in width and 12 inches in depth. The said side-
walk shall be supported on the other side by concrete columns 12 inches
by 12 inches in cross-section spaced 10 feet apart, center to center, along
a line 1 foot from the side lines of the said lower level, all as shown in
said drawings.
Each elevated sidewalk herein provided to be constructed along the
sides of the lower level between East North Water Street and East Indiana
Street shall be supported on the roadway side by a concrete wall of the
same size and in the same manner as is herein specified for the similar
walls between East Lake Street and East North Water Street, and on
the other side it shall be supported by retaining walls along the side line
of the lower level, constructed of the same material and in the same man-
ner as is herein specified for retaining walls under sidewalks adjoining,
private lands, all as shown in said drawings.
Grade and Pave Lower Level:
The roadways of the lower level of the proposed thoroughfare, in-
cluding alley returns, from the south curb line of East South Water Street
to the southern terminus of the said lower level shall be graded by filling
cr excavating, as may be required, and upon the surface when compacted
shall be placed a concrete pavement eight inches in depth, the top surface
of which shall be at the grade herein specified for the pavement of the
lower level.
The roadway of the lower level, including alley.returns, from the north
curb, line of East South Water Street to the south line of the South Plaza,
shall be graded by excavating or filling, as may be required, and upon the
surface of the said roadbed when compacted shall be placed a layer of con-
crete eight inches in depth, the top surface of which shall be at the proper
elevation to receive the pavement of granite blocks herein specified which
shall be placed thereon, at elevations shown in said drawings.
The roadways of the lower level of the South Plaza shall be graded by
excavating or filling, as may be required, and upon the surface of the said
roadbed when compacted shall be placed a layer of concrete eight inches
in depth, the top surface of which shall be at the proper elevation to re-
ceive the pavement of granite blocks herein specified which shall be placed
thereon, at elevations shown in said drawings.
The roadways of the lower level of the North Plaza, excepting the
space covered by railroad tracks, shall be graded by excavating or filling
as may be required, and upon the surface when compacted shall be placed
a layer of concrete eight inches in depth, the top surface of which shall be .
at the proper elevation to receive the pavement of granite blocks herein
specified which shall be placed thereon at elevations shown in said draw-
ings.
The roadways of the lower level, including alley returns, from the
23
North Plaza to the south curb line of East Indiana Street shall be graded
by excavation or filling, as may be required, and upon the surface when
compacted shall be placed a layer of concrete eight. inches in depth, the
top surface of which shall be at the proper elevation to receive the pave-
ment of granite blocks herein specified which shall be placed thereon.
Grade and Pave East Lake Street:
The roadway of East Lake Street, including alley returns, from the
east line of the proposed thoroughfare to the west line of Beaubien Court
shall be graded by excavation or filling, as may be required, and upon the
surface when compacted shall be placed a layer of concrete eight inches in
depth, the top surface of which shall be at the proper elevation to receive
the pavement of granite blocks herein specified, which shall be placed
thereon.
Grade and Pave East South Water Street:
The roadway of East South Water Street, including alley returns, from
the west line of the first alley west of the proposed thoroughfare to the
west line of Beaubien Court shall be graded by excavation or filling, as may
be required, and upon the surface when compacted shall be placed a layer
of concrete eight inches in depth, the top surface of which shall be at the
proper elevation to receive the pavement of granite blocks herein specified,
which shall be placed thereon.
Grade and Pave East Indiana Street:
The roadway of East Indiana Street, including alley returns, from the
east line of Rush Street to the west line of St. Clair Street, excepting the
space covered by street car tracks, shall be graded by excavation or filling,
as may be required, and upon the surface when compacted shall be placed
a layer of concrete eight inches in depth, the top surface of which shall be
at the proper elevation to receive the pavement of granite blocks herein
specified, which shall be placed thereon.
Grade and Pave River Street:
The roadway of River Street from the west portal of the lower level
of the South Plaza to a line at right angles with the center line of River
Street and 7 feet southwest of the north corner of Lot 3 of Block 4 of Fort
Dearborn Addition to Chicago shall be graded and upon the surface when
compacted shall be placed a layer of concrete eight inches in depth, the top
surface of which shall be at the proper elevation to receive the pavement
of granite block, herein specified, which shall be placed thereon. The top
surface of the pavement shall be rounded between the gutters and shall
conform to the grade of the adjoining pavement of the said lower level at
one end as herein specified and shall conform to the elevation of the ex-
isting pavement at the other end, all as shown on said drawings.
Walks on River Street:
A sidewalk shall be laid along and adjoining each side of River Street
between the west portal of the lower level of the South Plaza and the said
line 7 feet southwest of the north corner of the said Lot 3.
That portion of the sidewalk which is over existing sidewalk vaults
shall be of concrete and steel and shall be supported by the existing curb
walls and by 18-inch I-beams which shall be supported on steel columns
encased in concrete and located 20 feet from center to center along lines
4 feet from and parallel with the side lines of the said River Street. The
remainder of the sidewalk space shall be graded by excavation or by filling,
as may be required, and the surface, when compacted, shall be brought to
24
the proper grade to receive the concrete sidewalk and cinder foundation
herein specified.
Pave River Street East of Thoroughfare:
All that portion of River Street, as widened, between the east portal
of the lower level of the South Plaza and the east line of Fort Dearborn
Addition to Chicago, and lying south of the concrete wall herein described
as extending east from the newel post, except the granite landing herein
described, shall be graded by excavation or filling, as may be required, and
upon the surface shall be placed a layer of concrete 8 inches in depth, the
top surface of which shall be at the proper elevation to receive the pave-
ment of granite blocks herein specified, which shall be placed thereon, at
the elevations shown in .said drawings.
Paving Intersecting Alleys:
Granite block pavements shall be laid in the alleys intersecting the
proposed improvement as follows:
In the first alley west of the proposed thoroughfare from East Lake
Street to the first alley south of East Lake Street.
In the first alley west of the proposed thoroughfaſe from East Lake
Street to the first alley north of East Lake Street.
In the first alley south of East South Water Street from the east line
of the proposed thoroughfare to the west line of Beaubien Court.
In the first alley north of East South Water Street from the east line
of the proposed thoroughfarę to a line 30 feet east thereof.
In the first alley north of East South Water Street from the west line
of the proposed thoroughfare to a line 50 feet west thereof.
In the first alley north of East. Michigan Street from the east line of
the proposed thoroughfare to a line 30 feet east thereof.
In the first alley north of East Michigan Street from the west line of
the proposed thoroughfare to a line 30 feet west thereof.
In the first alley north of East Illinois Street from the east line of the
proposed thoroughfare to a line 100 feet east thereof.
In the first alley north of East Illinois Street from the west line of the
proposed thoroughfare to a line 100 feet west thereof.
In the first alley north of East Ohio Street from the east line of the
proposed thoroughfare to a line 30 feet east thereof.
Each of the said alleys within the limits named shall be graded by
filling or by excavation, as may be required, and upon the surface, when
compacted, shall be placed a layer of concrete eight inches in depth, upon
which shall be placed the granite block pavement. The grade of the top
of the pavement in each alley shall conform to the grade of the adjoining
pavement of the improvement herein specified, at one end of the alley,
and thence it shall slope uniformly to the other end of the alley, where it
shall conform to the elevation of the present surface of the alley.
Filling shall be placed in the first alley north of East Ohio Street from
the west line of the proposed thoroughfare to a line 50 feet west thereof.
Filling shall be placed in the first alley west of the proposed thoroughfare
from East Ohio Street to a line 50 feet north thereof. Filling shall be
placed in the first alley east of the proposed thoroughfare from East Ohio
Street to a line 50 feet south thereof. The said filling, when compacted,
shall be brought to a grade in each of the said alleys so as to conform to
the grade of the adjoining pavement of the improvement herein specified
25
at one end of the alley and thence it shall slope uniformly to the other end,
where it shall conform to the present surface of the alley.
Retaining Walls:
All retaining walls herein provided for shall be of the location, size
and dimensions shown in said drawings, and if not so shown or otherwise
specified herein they shall be constructed as follows: The top shall have a
thickness of 18 inches and the bottom shall have a thickness of 40 per
centum of the height of the wall. The walls shall have vertical faces on
the sides towards the filling which they retain, except along the north line
of East Indiana Street and along the roadway of the lower level at and
near East Lake Street, where the faces bounding the lower level shall be
vertical.
The top of the said walls shall conform to the elevation of the adjoin-
ing structures. The bottom of the said walls along East Lake Street west
of the proposed thoroughfare shall be at an elevation of three feet above
Chicago City Datum. The bottom of the said walls in the said thorough-
fare south of East South Water Street shall be at an elevation of three feet
above Chicago City Datum. The bottom of the said walls from East In-
diana Street to East Ohio Street shall be at an elevation of three feet above
Chicago City Datum.
Concrete partition walls shall be constructed and located as shown in
said drawings so as to separate the south portion of the lower level from
the space beneath the sidewalk on the east side of the thoroughfare south
of East Lake Street and from the-space beneath the sidewalk on the north
side of East Lake Street west of the thoroughfare. Concrete partition walls
shall be constructed and located as shown in said drawings so as to separate
the north portion of the lower level from the space beneath the sidewalks
on each side of the thoroughfare north of East Indiana Street.
Each of the said concrete partition walls shall be 12 inches in thickness
and shall rest on a concrete footing course 24 inches in width and 12 inches
in depth. The bottom of the said footing course shall be at an elevation of
4 feet above Chicago City Datum and the top of the said wall shall be at
the elevation of the under side of the said overhead sidewalk herein pro-
vided for.
Catchbasins:
Seven catchbasins shall be constructed in the proposed thoroughfare
between East Randolph Street and the north line of East Lake Street and
located at necessary points along the curb lines. Twenty catchbasins shall
be constructed in the lower level from the south end thereof to the south
end of the said bridge, and shall be located at necessary points along the
curb lines. Fourteen catchbasins shall be constructed in the lower level
from the north end of the said bridge to the south line' of East Indiana
Street, and shall be located at necessary points along the curb lines. Eight
catchbasins shall be constructed in East Indiana Street between Rush Street
and St. Clair Street, and shall be located at necessary points along the curb
lines, Four catchbasins shall be constructed at East Ohio Street between
Rush Street and St. Clair Street, not including the intersection of the thor-
oughfare and located at necessary points along the curb lines. Thirty-
four catchbasins shall be constructed in the proposed thoroughfare be-
tween East Indiana Street and the center line of East Chicago Avenue, and
located at necessary points along the curb lines. One catchbasin shall be
constructed in the alley between East Ohio Street and East Ontario Street,
30 feet east of the said thoroughfare. Twenty-seven gutter grates shall
26
be placed along the curb lines of the upper level between East Lake Street
and East Indiana Street.
The said catchbasins shall be seven feet two inches deep, measured
from the top of the brick work, and shall have an internal diameter of four
feet at the bottom and to a plane five feet above and parallel therewith.
The walls of the said catchbasins shall be eight inches thick and shall be
built of two courses of sewer brick laid edgewise in perpendicular courses
lipon a floor of pine planks two inches in thickness. The top of the said
catchbasins shall decrease to two feet internal diameter, being drawn in
by means of nine header courses, 'the diameter being decreased uniformly
for each course.
Each of said catchbasins shall be connected with the adjacent sewer
by means of a tile pipe of nine inches internal diameter, and shall be trap-
ped with a half trap of tile pipe of nine inches internal diameter. The
said trap shall be set so that the elevation of the bottom of the inside of
the same shall be three feet six inches above the floor of the catchbasin.
Said catchbasin shall be provided with a suitable cast iron cover, which
cover, inclusive of lid, shall weigh 560 pounds. Said cast iron cover shall
be set so that the top of the same shall coincide with the finished surface
of the pavement hereinbefore described. The tile pipe specified shall be
straight, smooth, and sound, thoroughly burned, well glazed, and free from
lumps and other imperfections, and 7 inch thick.
Each of said gutter grates shall be of cast iron and shall be 17 inches
by 22 inches, set in a cast iron box the bottom of which shall have an open-
ing 9 inches in diameter. To the bottom of the said box there shall be
connected a light weight cast iron reducer pipe 3 feet in length, being 9
inches in diameter at the upper end and 6 inches in diameter at the lower.
At the lower end of the reducer pipe shall be connected a light weight cast
iron pipe 6 inches in diameter which shall extend down to and be con-
nected with one of the catchbasins hereinbefore specified to be built in
the lower level. The cast iron grate and box shall weigh not less than 115
pounds.
Adjustment of Manholes:
The several sewer manholes located along the said improvement shall
be raised or lowered and the covers of the said manholes shall be adjusted
as may be necessary to make them conform to the finished surface of the
pavement herein specified.
Relocation of Sewers:
That portion of the existing brick sewer lying within the limits of the
South Plaza shall be rebuilt in a location sufficiently west of the present
location to avoid the foundations of the bridge house and column foot-
ings as shown in said drawings.
That portion of the tile pipe sewer now lying within the limits of the
South Plaza shall be rebuilt along a line south of the center row of columns
in the east and west roadway of the lower level of the South Plaza and
shall be connected with the brick sewer as relocated and shown in said
drawings.
The said brick sewer and tile pipe sewer as rebuilt shall be of the same
size and of the same materials as the corresponding existing sewers.
All brick work and tile pipe shall be laid in Portland cement mortar.
Bascule Bridge:
The bridge across the river and in all its parts shall be of the location,
grades, dimensions and material as shown on said drawings and shall be
27
1
a trunnion bascule bridge having two levels or decks corresponding to the
two levels of the proposed thoroughfare. Each trunnion shall be sup-
ported on cross girders which shall rest on fixed trusses which shall. rest
on concrete piers, one in front of and one back of the trunnion. Between
these piers shall be located the piť in which the counterweight shall swing
when the bridge is being opened. At the back of each rear pier there shall
be a machinery room in which shall be placed the motors which move
the bridge. On each side of the machinery room there shall be a space
provided under the lower plaza extending to the ends of the abutment
walls hereinafter described. This space is herein designated as the base-
ment.
Movable Portion:
The movable portion of the bridge shall consist of four equal parts
symmetrically arranged with respect to two vertical planes at right angles
to each other, one plane being along the center line of the bridge and the
other plane midway between the two center lines of the trunnions. Each of
said four parts is herein designated as a single arm and two adjoining parts
on the same side of the river are herein designated as a double arm. Each
single arm shall be carried by two main trusses rigidly connected to each
other by the floor beams of the two decks, laterals and the counterweight.
Each double arm shall be formed by two single arms which shall be con-
nected to each other by a series of diaphragms placed between the vertical
members of the inner main trusses, as shown on said drawings.
Size:
The clear span between masonry at abutments shall be 220 feet." The
clear height under the bridge, when in its lower position, shall be 1642
feet above Chicago City Datum for a distance of 176 feet. The distance
between the trunnions of the bridge shall be 256 feet. The distance
between the centers of the main trusses of each single arm shall be 27
feet, and the distance between the centers of the inner trusses of the two
adjoining single arms shall be 6 feet. The clear headroom between
the lower roadway floor and the lowest part of the floor system carrying
the upper deck shall be 1312 feet.
Location:
The center line of the bascule bridge shall coincide with a straight
line extending from a point on the center line of the roadway of the upper
level at a distance of 423.46 feet north of the north line of East South
Water Street to a point on the center line of the thoroughfare 22.3 feet
south of the south line of East Michigan Street, the last named point being
704.84 feet northerly of the first named point. The center line of the
south trunnions shall be 160.38 feet northerly of the said point 423.46
feet north of the north line of East South Water Street, and the center
line of the north trunnions shall be 256 feet northerly of the south trun-
nions. The center of the trunnions shall be at an elevation of 15.104 feet
above Chicago City Datum.
.
Upper Deck:
The upper deck of the said bridge shall be entirely above the trusses
and shall consist of two roadways, each 27 feet and 3 inches between wheel
guards, separated from each other by a slightly elevated floor strip or
island, 5 feet and 6 inches wide, and two sidewalks each 15 feet wide,
on the outer sides of the said roadways, making the upper deck of
the bridge 90 feet wide over all. The island between the two roadways
shall have the same elevation as the sidewalks. The elevation of the top
)
28
of the pavement of each roadway of the upper deck at each side thereof
shall be 7 inches below the top of the adjoining sidewalk. The top of the
pavement of each said roadway shall be rounded with a crown along the
center line thereof 5 inches below the top of the said sidewalks. The top
of the sidewalks of the upper deck shall be level transversely and shall
conform to the grades herein specified.
Lower Deck:
The lower deck or level of each single arm shall consist of one road-
way 18 feet wide between wheel guards and one sidewalk 5 feet wide,
both of which shall be located between the two main trusses. The top
of the pavement of each roadway of the lower deck shall be 6 inches below
the top of the adjoining sidewalk. The top of the sidewalks shall conform
to the grades herein specified. The said pavement and sidewalks of the
lower deck shall be level transversely.
The wearing surface of the upper deck roadways shall be asphalt
laid on buckled plates.
Pavements and Walks:
The sidewalks of the upper deck shall be carried on steel brackets and
shall have wearing surfaces of two-inch yellow pine plank resting on and
nailed to yellow pine stringers.
The island between the two roadways of the upper deck shall be of
yellow pine plank 2 inches in thickness resting on and nailed to yellow
pine stringers.
On each side of each roadway of the upper level there shall be a
wheel guard or curbing consisting of a six inch by nine and one-half inch
white oak timber, with a 4 inch by 4 inch steel angle securely bolted
thereto.
The wearing surface of each roadway of the lower deck shall be
creosoted wooden blocks. This pavement shall extend from the south
line of the south machinery room to the north line of the north machinery
room. The said wooden blocks shall be four inches deep and on the fixed
portion of the bridge the said pavement shall be supported on reinforced
concrete slabs over the machinery rooms, and on the movable portion of
the bridge it shall be supported by and securely fastened to a layer of
two-inch yellow pine plank laid on four-inch yellow pine plank all securely
fastened to the steel structure of the bridge as shown on said drawings.
The wearing surface of the sidewalks of the lower deck shall be two-
inch yellow pine plank securely fastened to yellow pine stringers.
All wood herein specified to be used in the construction of the said
bridge shall be creosoted in the manner herein specified.
Counterweights:
Counterweights shall be attached to the rear ends of the arms of the
movable portion of the said bascule bridge, of sufficient weight to balance
the front portion of the arms. The said counterweights shall consist
largely of concrete of the kind herein designated as Class “A”. Besides
the concrete the counterweight boxes shall contain 700 tons of pig iron
or iron punchings, and in addition 500 tons of counterweight in the form
of shaped iron castings.
Strength of Bridge:
The bridge and all its parts shall have sufficient strength to bear
safely, in addition to its own weight, live loads as follows:
On the upper deck, two vehicles and a uniformly distributed load
as herein described for the elevated structure. over the lower level.
1
29
On the lower deck, a continuous line of 50 ton street cars, each
50 feet long, on one track on each single arm, the center line of the
said track being 7.25 feet from the center line of the inner truss, a moving
vehicle on each roadway, the vehicle having a weight of 5 tons on each
of four wheels spaced 5 feet apart in one direction and 10 feet apart
in the other direction, and on all of the space of the roadways and side-
walks not occupied by the street cars and vehicles a uniformly distributed
load of 100 pounds per square foot.
To allow for dynamic effect of live loads, except where otherwise
provided, the maximum computed live load stress shall be increased by
an amount which shall be determined by the following formula:
100
I=S
NL + 300
in which
I= Increment to be added.
S = Computed maximum live load stress.
L=Length in feet of load on bridge producing maximum strength.
N=One-tenth of the total width of roadway and sidewalks loaded to
produce maximum stress.
In addition to the above loads a lateral load shall be assumed of 300
lbs. per lineal foot of each chord or deck. All lateral loads shall be treated
as moving. When the bridge is in motion or open to any extent the loads
causing stress in structural parts of the moving or supporting structure
shall consist of the dead weight with 20% added for effects of vibration
and a wind force of 20 lbs. per square foot over the entire actually
exposed area. All the loads shall be assumed to be in positions which shall
give the maximum stress for each member considered.
In determining the dimensions of trunnions and parts of machinery
a wind pressure of 20 lbs. per square foot of exposed surface shall be
assumed.
Machinery:
The motive power for operating the bridge will be electricity.
Four electric motors of a normal capacity of 100 H. P. per motor
shall be placed at each side of the river in the machinery room behind
the anchor piers. The mechanical and electrical connections between
these motors and the bridge arms shall be such that any two of these
motors can be used at any time for operating each double arm, and that
the idle pair of motors shall be held as a reserve. The power transmission
from motors to bridge leaf shall be arranged by means of gear trains of
a suitable type, and also by means of main pinions engaging with the
teeth of circular racks, which shall be rigidly fastened to each outside
truss of each single arm, all as shown on said drawings.
Besides the main motors, two 742 H. P. motors, one on each side of the
river, shall be installed with proper gearing for operating the heel locks
supporting the tail ends of the main trusses.
Two 5 H. P. motors shall be installed with proper gearing at the river
end of the south arms of the bridge for operating the center locks connect-
ing the two double arms, as shown on said drawings.
The operation of the main machinery shall be controlled by two sets
of brakes for each double arm. One set shall be operated by hand power
and the other by compressed air. The air for the latter shall be fur-
!
30
0
i
.
nished by an air compressor plant, driven by a 5 H. P. electric motor,
located in the machinery room, one on each side of the river.
Suitable centrifugal water pumps to discharge any seepage water from
the counterweight pits, driven by 10 H. P. electric motors, two for each
pit, shall be provided.
Suitable safety gates shall be installed at each end of the bascule
bridge on the upper level, as shown in said drawings.
All machinery, including all necessary bridge gates, shall be suitably
arranged so as to be controlled by the bridge tenders in the bridge houses,
where the controllers, electric switches, switchboards, indicators, hand
brake levers, and other necessary apparatus shall be installed and located
conveniently.
Substructure:
The substructure of the bridge on each side of the river shall consist
of two concrete abutment piers 95 feet long which shall be rigidly con-
nected with each other by two vertical side walls and a horizontal bottom,
forming a pit for the tail end and counterweights herein mentioned. The
front abutment pier shall rest on three concrete cylinders, 8 feet in
diameter, the center line of which shall be 15 feet in front of the center
line of the trunnion, and the rear abutment pier shall rest on three con-
crete cylinders, 8 feet in diameter, the center line of which shall be 39
feet and 242 inches back of the center line of the trunnion. The elevation
of the top of the floor of the said pit at its lowest point shall be 25 feet
below Chicago City Datum. The elevation of the bottom of the said abut-
ment piers shall be 30.25 feet below Chicago City Datum. The said
cylinders shall extend down to solid rock.
Bridge Houses:
Four bridge houses, for the use of bridge tenders, shall be constructed
and located one on each side of each end of the bridge. The east and
west center line of the bridge houses at the south end of the bridge shall
be 11 feet south of and parallel with the center line of the south trunnions
of the bridge. The east and west center line of the bridge houses at
the north end of the bridge shall be 16 feet 4 inches north of and parallel
with the center line of the north trunnions of the bridge. The north and
south center lines of the houses shall be 57.33 feet from the center
line of the bridge. Each bridge house, and all its parts, shall be of the
location, dimensions and material as is shown on said drawings.
The interior horizontal dimensions of each of these houses at the
elevation of the upper level shall be 13 feet and 10 inches in the clear with
walls 1 foot and 5 inches in thickness. The exposed portion of the
outer walls of each house from an elevation of 4.67 feet above Chicago City
Datum to an elevation of 18.92 feet above Chicago City Datum shall be
faced with dressed granite hereinafter specified. These facings shall
have a minimum thickness of 8 inches. From an elevation of 18.92 feet
above Chicago City Datum to ån elevation of 35.75 feet above Chicago
City, Datum the exposed portion of the said outer walls shall be faced with
Bedford limestone. This facing shall have a minimum thickness of 6
inches. Above'an, elevation of 35.75 feet above Chicago City Datum all
four walls shall be faced with Bedford limestone. This facing shall have
a minimum thickness of 6 inches. These walls, where faced with stone,
shall be backed with concrete to a total minimum thickness of 17 inches.
The walls which are not faced with stone shall have a minimum thickness
of 1 foot and 9 inches. There shall be three floors made of reinforced
concrete at elevations of 18.00 feet, 36.57 feet and 57.19 feet above Chicago
31
1
City Datum, and a basement floor at an elevation of 6.25 feet above Chicago
City Datum. A circular ornamental iron stairway shall connect the two
top floors as shown on said drawings. An ornamental iron stairway of
straight runs and landings shall connect the two lower floors and base-
ment. The operator's room shall be on the floor at an elevation 57,19 feet
above Chicago City Datum. This room shall be of tile furred and plastered.
This floor shall carry the operating apparatus and indicators for the
mechanical operation of the bridge as herein specified.
On the floor at an elevation of 18.00 feet above Chicago City Datum
there shall be installed a toilet room with water-closet, wash-basin and
urinal, with soil and vent pipes.
Doors and windows shall be provided in the walls of each house of
material and sizes as shown on said drawings.
The roof shall be of reinforced concrete, covered with Bedford lime-
stone, and a cornice provided as shown on said drawings.
The gutter shall be of sheet copper all properly sloped to a down-
spout which shall be carried down inside the building as shown on said
drawings. A 6-inch tile sewer shall connect the toilet system, and the
downspout with the river.
Each bridge house shall be carried on a foundation of concrete
supported by wooden piles. The said foundation shall be independent of
the substructure of the bridge. The bottom of the said foundation shall
be at an elevation of 15 feet below Chicago City Datum, all as shown
on said drawings.
Machinery Room:
The machinery room shall be directly at the back of the rear pier of
the bridge and shall be of the location, dimensions and material shown on
said drawings. The elevation of the floor of the machinery room shall
be 1 foot above Chicago City Datum. The foundations of the walls of the
machinery room shall be of concrete resting on wooden piles. The eleva-
tion of the bottom of the said foundations shall be four feet below Chicago
City Datum. The roof of the machinery room shall be of steel and rein-
forced concrete which shall form the floor of the lower level. The said
machinery room shall be provided with a concrete floor six inches in depth,
with the top surface finished in the manner herein specified for sidewalks.
Basenient:
A retaining wall shall be built under the lower level of the South
Plaza. It shall be located as shown on said drawings so as to form the
south wall of the machinery room, and on each side of the machinery
room it shall extend along and under the north curb line of the lower level
to the limits of the upper level of the said South Plaza projected downward
on the lower level. The wall shall be of reinforced concrete resting on
wooden piles, and the bottom of the said concrele on each side of the
machinery room shall be at an elevation of two feet below Chicago City
Datum.
A retaining wall shall be built under the lower level of the North
Plaza. It shall be located as shown on said drawings so as to form the
- north wall of the machinery room, and on each side of the machinery
room it shall extend along a straight line parallel with the abutment pier
of the bridge until it intersects the inner abutment wall on the east and
the limits of the plaza on the west. The wall shall be of reinforced con-
crete resting on wooden piles and the bottom of the said concrete shall
be at an elevation of two feet below Chicago City Datum.
The enclosed spaces below the lower level on each side of the machin-
1
32
ery room between the retaining walls last described and the abutment walls
herein described, and herein designated as the basement, shall be provided
with a concrete floor six inches in depth, with the top surface finished in
the manner herein specified for sidewalks.
The roofs of the said spaces or basements shall consist of a structure
of steel and reinforced concrete, and shall be finished on the upper sur-
face and form sidewalks for the lower level of the plazas as herein
described and shown on said drawings.
Dock Walls:
At each end of the front abutment piers dock walls shall be built
extending easterly and westerly the full width of the plazas and along
both sides of the river for supporting and protecting the plaza walls
near the river. The said dock walls shall terminate on the present dock
lines of the river and the length of the several dock walls shall be respect-
ively as follows: The southwest wall 159 feet, the southeast wall 170
feet, the northwest wall 118 feet, the northeast wall 148 feet.
The space between the said dock walls and the abutment walls and
adjoining retaining walls shall be provided with a concrete floor six inches
in depth with the top surface finished in the manner herein specified for
sidewalks. The top of the said floor shall be at an elevation of 5 feet above
Chicago City Datum.
These walls shall be built of reinforced concrete to a depth of 30
feet below Chicago City Datum, resting on wooden piles, cut off at 28
feet below Chicago City Datum. Anchor rods, entirely enclosed in concrete
extending 60 feet inland and anchored to substantial dead men also built
of reinforced concrete, shall be provided ten feet distant from each other
for the entire length of each wall. The top of the said dock walls shall be
at an elevation of 5 feet above Chicago City Datum. The location, dimen-
sions and material of each of said dock walls shall be as shown on said
drawings.
Abutment Walls:
Abutment walls shall extend from the bridge houses to the east and
west edges of the upper level of the plazas. They shall be located and
built as shown on said drawings. They shall have their bases at an eleva- ,
tion of 5 feet above Chicago City Datum. The said abutment walls shall
be supported on a foundation of concrete supported by wooden piles. The
bottom of the said foundation shall be at an elevation of five feet below
Chicago City Datum and the top of the piles shall be cut off at an elevation
of four feet below Chicago City Datum, all as shown in said drawings. The
abutment walls shall be built entirely free from the superstructure of the
plazas.
A continuous vertical joint shall separate the masonry of the super-
structure at the crossings of River Street with the east and west lines of
the plazas.
The words "top of wall" hereinafter used in description of these walls
shall refer, on the inner wall, to the top of the cornice course and on
the outer wall to the top of the string course as shown on said drawings.
The words "outer face" hereinafter used to describe the location of
these walls is the principal outside wall surface.
East Wall-South Plaza:
The outside face of the east outer abutment wall of the South Plaza
shall commence, at the east wall of the bridge house at a point 67.67 feet
east of the center line of the bridge measured at right angles thereto and
33.
1
18. feet south of the center line of the south trunnion of the bridge meas-
ured at right angles thereto; thence it shall extend easterly for a distance
of 8 feet parallel to the center line of the trunnion of the bridge, thence
it shall extend southerly a distance of one foot parallel with the center line
of the bridge, thence it shall extend easterly for a distance of 10.42 feet
‘at right angles to the center line of the bridge, thence it shall extend
easterly for a distance of 37.83 feet curving to the south with a radius
of 101.18 feet, thence it shall extend easterly and parallel with the inner
wall hereinafter described for a distance of 22.69 feet, and shall terminate
in a newel post the center of which is 11.916 feet from the outer face of the
said inner wall and 1.42 feet east of the east line produced of the opening
in the inner wall at the lower landing hereinafter described. The top of
the said abutment wall shall be at an elevation of 35.75 feet above Chicago
City Datum, where it adjoins the bridge house and shall continue level to
a point 75.67 feet east of the center line of the bridge, thence it shall
slope gradually to an elevation of 13.00 feet above Chicago City Datum
at the newel post, provided that at the landings herein described the top
of the wall shall be level.
The west end of the outer face of the inner abutment wall shall be
on a line 76.67 feet east of and parallel with the center line of the bridge,
10.92 feet south of the outer face of the outer wall measured at right
angles thereto; thence the outer face of the said inner wall shall extend
easterly for a distance 9.42 feet at right angles to the center line of the
bridge, thence it shall extend easterly for a distance of 35.94 feet curved
to the south with a radius of 90.266 feet, thence it shall extend easterly
a distance of 3 feet, thence it shall extend southerly at right angles to
the last direction a distance of .75 feet, thence it shall extend easterly at
right angles to the last direction to a point which is 156.58 feet east
of the center line of the bridge measured at right angles thereto, and 29.50
feet south of the center line of the south trunnion of the bridge,
measured at right angles thereto, thence it shall extend southerly a dis-
tance of 10.00 feet parallel with the center line of Michigan Avenue.
The top of the inner wall shall be level at an elevation of 35.75 feet
above Chicago City Datum.
Between the outer and inner walls there shall be a stairway extending
from the upper plaza at' an elevation of 36.17 feet above Chicago City
Datum down to an elevation of 11.50 feet above Chicago City Datum. In
this stairway there shall be a landing at an elevation of 26.125 feet above
Chicago City Datum, a landing at an elevation of 16.5 feet above Chicago
City Datum, and there shall be a landing at an elevation of 11.50 feet above
Chicago City Datum. At the landing the elevation of which is 16.5 feet
above Chicago City Datum there shall be an opening in the inner wall lead-
ing to the lower level of the plaza. The bottom of this opening shall be
at an elevation of 17 feet above Chicago City Datum, and its soffit at an
elevation of 30.375 feet above Chicago City Datum. The opening shall be
20.0 feet long. 'The opening shall have a balustrade from the east end of
the landing to the east side of the opening.
The outer wall shall have three openings to the basement. The
bottom of these openings shall be at an elevation of 5.50 feet above Chicago
City Datum, and the soffits of the openings shall be at an elevation of 13.67
feet above Chicago City Datum. These openings to the basement shall
be under the stairway. The inner wall shall have, openings opposite to
and at the same elevation as the openings in the outer wall.
The outer wall shall have along its top a stone balustrade, as shown
on these drawings, the top of which, along its entire length, shall be
A
34
3
3 feet and 6 inches above the top of the wall. The inner wall shall have
along its top a stone balustrade as shown on said drawings, the top of which,
along its entire length, shall be 3 feet and 6 inches above the top of the
wall.
A wall shall connect the bridge house and the inner wall at the point
of beginning of the inner wall and shall be as shown on said drawings.
West Wall-South Plaza:
The outside face of the west outer abutment wall of the South Plaza
shall commence at the west wall of the bridge house at a point 67.67 feet
west of the center line of the bridge measured at right angles thereto and
18 feet south of the center line of the south trunnion of the bridge meas-
ured at right angles thereto; thence it shall extend westerly for a distance
of 8 feet parallel to the center line of the trunnion of the bridge, thence
it shall extend southerly a distance of 1. foot parallel with the center line
of the bridge, thence it shall extend for a distance of 62.88 feet curving to
the south with a radius of 78.18 feet, thence it shall extend westerly and
parallel with the inner wall hereinafter described for a distance of .22.50
feet, and shall terminate in a newel post the center of which is 11.916 feet
from the outer face of the said inner wall and .50 feet west of the west line
produced of the opening in the inner wall at the lower landing hereinafter
described. The top of the said abutment wall shall be at an elevation of
35.75 feet above Chicago City Datum where it adjoins the bridge house and
shall continue level to a point 75.67 feet west of the center line of the
bridge, thence it shall slope gradually to an elevation of 7.58 feet above
Chicago City Datum at the newel post, provided that at the landings herein
described the top of the wall shall be level.
*The east end of the outer face of the inner abutment wall shall be on
a line 75 feet west of and parallel with the center line of the bridge and
10.92 feet south of the outer face of the outer wall measured at.right angles
thereto; thence the outer face of the said inner wall shall extend west-
erly for a distance of 56.12 feet curved to the south with a radius of 67.27
feet, thence it shall extend westerly a distance of 3 feet, thence it shall
extend southerly at right angles to the last direction a distance of .75
feet, thence it shall extend westerly at right angles to the last direction to
a point which is 161.5 feet west of the center line of the bridge measured
at right angles thereto and 59 feet south of the center line of the south
Trunnion of the bridge measured at right angles thereto, thence it shall
extend southerly a distance of 13.50 feet along a straight line towards the
southwesterly corner of the South Plaza.
The top of the inner wall shall be level at an elevation of 35.75 feet
above Chicago City Datum.
Between the outer and inner walls there shall be a stairway extend-
ing from the upper plaza at an elevation of 36.17 feet above Chicago City
Datum down to an elevation of 5 feet above Chicago City Datum. In this
stairway there shall be a landing at an elevation of 26.125 feet above Chi-
cago City Datum and a landing at an elevation of 16.50 feet above Chicago
City Datum. At the lower landing there shall be an opening in the inner
wall leading to the lower level of the plaza. The bottom of the opening
shall be at an elevation of 17 feet above Chicago City Datum and its soffit
at an elevation of 30.375 feet above Chicago City Datum. The opening
shall be 20.25 feet long. The opening shall have a balustrade extending
from the west end of the landing to the west side of the opening. The
outer wall shall have three openings to the basement. The bottom of
these openings shall be at an elevation of 5.5 feet above Chicago City
Datum and the soffits of the openings shall be at an elevation of 13.67
35
1
feet above Chicago City Datum. T'hese openings to the basement shall
be under the stairway. The inner wall shall have openings opposite to
and at the same elevation as the openings in the outer wall.
The outer wall shall have along its top a stone balustrade as shown
on said drawings, the top of which along its entire length shall be threa
feet six inches above the top of the wall.
The inner wall shall have along its top a stone balustrade as shown
on said drawings, the top of which, along its entire length, shall be 3
feet and 6 inches above the top of the wall.
A wall shall connect the bridge house and the inner wall at the point
of beginning of the inner wall and shall be as shown on said drawings.
East WallNorth Plaza:
The outer face of the east outer abutment wall of the North Plaza
shall commence at the east wall of the bridge house at a point 67.67
feet east of the center line of the bridge measured at right angles thereto
and 23.33 feet north of the center line.of the north trunnion of the bridge
measured at right angles thereto; thence it shall extend easterly for a
distance of 8 feet parallel to the center line of the trunnion of the bridge,
thence it shall extend northerly a distance of 1 foot parallel with the
center line of the bridge, thence it shall extend eaşterly for a distance
of 70.3 feet curving to the north with a radius of 69.92 feet, thence it
shall extend easterly and parallel with the inner wall hereinafter described
for a distance of 23.50 feet and shall terminate in a newel post the center
of which is 11.916 feet from the outer face of the said inner wall and.5.0
feet west of the east line produced of the opening in the inner wall at the
lower landing hereinafter described. The top of the said abutment wall
shall be at an elevation of 35.75 feet above Chicago City Datum where it
adjoins the bridge house and shall continue level to a point 75.67 feet east
of the center line of the bridge, thence it shall slope gradually to an
elevation of 8 feet above Chicago City Datum at the newel post, provided
that at the landings herein described the top of the wall shall be level.
The west end of the outer face of the inner abutment wall shall be
on a line 75.67 feet east of and parallel with the center line of the bridge
and 10.92 feet north of the outer face of the outer wall measured at
right angles thereto; thence the outer face of the said inner wall shall
extend easterly for a distance of 58.74 feet jurved to the north with a
radius of 59.0 feet, thence it shall extend northeasterly a distance of 3
feet along a line which intersects the east line of the North Plaza at a
point 145.0 feet southeasterly of the intersection of said east line of the
North Plaza with the south line of Easť North Water Street, thence it
shall offset at right angles northwesterly a distance of .75 feet, thence it
shall extend northeasterly parallel to the last described line to the east
line of the North Plaza.
The top of the inner wall shall be level at an elevation of 35.75 feet
above Chicago City Datum.
Between the outer and inner walls there shall be a stairway extend-
ing from the upper plaza at an elevation of 36.17 feet above Chicago
City Datum to an elevation of 5 feet above Chicago City Datum. In this
stairway there shall be a landing at an elevation of 26.125 feet above
Chicago City Datum and a landing at an elevation of 10.5 feet above Chi-
cago City Datum. At this lower landing there shall be an opening in the
.inner wall leading to the lower level of the plaza. The bottom of this
opening shall be at an elevation of 17 feet above Chicago City Datum,
and its soffit at an elevation of 30.375 feet above Chicago City Datum.
36
The opening shall be 23.42 feet long. The opening shall have a balustradı-
from the east end of the landing to the east side of the opening.
The outer wall shall have three openings to the basement. The bottom
of these openings shall be at an elevation of 5.5 feet above Chicago City
Datum and the soffits of the openings shall be at an elevation of 13:67
feet above Chicago City Datum. These openings to the lower level shal
be under the stairway. The inner wall shall have openings opposite
to and at the same elevation as the openings in the outer wall, exrept
at the most easterly opening in the outer wall where there shall be no
opening in the inner wall, all as shown on said drawings.
The outer wall shall have along its top a stone balustrade as shown
on said drawings, the top of which along its entire length shall be 3 feet
and 6 inches above the top of the wall.
The inner wall shall have along its top a stone balustrade as shown
on raid drawings, the top of which, along its entire length, shall be 3
feet 6 inches above the top of the wall.
A wall shall connect the bridge house and the inner wall at the point
of beginning of the inner wall and shall be as shown on said drawings.
West Walk-North Plaza:
The outside face of the west outer abutment wall of the North Plaza
shall commence at the west wall of the bridge house at a point 67.67 feet
west of the center line of the bridge measured at right angles thereto and
23.33 feet north of the center line of the north trunnion of the bridge
measured at right angles thereto; thence it shall extend westerly for a
distance of 8 feet parallel to the center line of the trunnion of the bridge,
thence it shall extend northerly a distance of 1 foot parallel with the center
line of the bridge, thence it shall extend westerly for a distance of 3.17
feet at right angles to the center line of the bridge, thence it shall extend
westerly for a distance of 42.25 feet curving to the north with a radius
of 70.92 feet, thence it shall extend westerly and parallel with the inner
wall hereinafter described for a distance 17.83 feet, thence curving south-
erly for a distance of 8.0 feet and shall terminate in a newel post the center
of which is 16 feet south of the outer face of the said inner wall and 2.42
feet west of the west line produced of the opening of the inner wall
at the lower landing hereinafter described. The top of the said abutment
wall shall be at an elevation of 35.75 feet above Chicago City Datum
where it adjoins the bridge house, and shall continue level to a point 75.67
feet west of the center line of the bridge, thence it shall slope gradually
to an elevation of 7.90 feet above Chicago City Datum at the newel post,
provided that at the landings herein described the top of the wall shall be
level.
The east end of the outer face of the inner abutment wall shall be
on a line 76.67 feet west of and parallel with the center line of the bridge,
and 10.92 feet north of the outer face of the outer wall measured at right
angles thereto; thence the outer face of the said inner wall shall extend
westerly for a distance of 2.17 feet at right angles to the center line of
the bridge, thence it shall extend westerly for a distance of 37.78 feet
curved to the north with a radius of 60 feet, thence it shall extend west-
erly a distance of 3 feet along a line at right angles to the center line of .
the bridge, thence it shall extend northerly and parallel to the center line
of the bridge a distance of .75 feet; thence it shall extend westerly along
a line at right angles to the center line of the bridge to the west line of tho
plaza. The top of the inner wall shall be level at an elevation of 35.75
feet above Chicago City Datum,
1
37
1
Between the outer and inner walls there shall be a stairway extending
from the upper plaza at an elevation of 36.17 feet above Chicago City
Datum down to an elevation of 5 feet above Chicago City Datum. In this
stairway there shall be a landing at an elevation of 26.125 feet above
Chicago City Datum and a landing at an elevation of 16.50 feet above
Chicago City Datum. At this lowest landing there shall be an opening
in the inner wall leading to the lower level of the plaza. The bottom
of this opening shall be at an elevation of 17 feet above Chicago City
Datum and its soffit at an elevation of 30.375 feet above Chicago City
Datum. The opening shall be 21.67 feet long. The opening shall have a
balustrade from the west end of the landing to the west line of the
opening
The outer wall shall have three openings to the basement. The
bottom of these openings shall be at an elevation of 5.50 feet above Chi-
cago City Datum and the soffits of the openings shall be at an elevation
of 13.67 feet above Chicago City Datum. These openings to the base-
ment shall be under the stairway. The inner wall shall have openings
opposite to and at the same elevation as the openings in the outer wall.
The outer wall shall have along its top a stone balustrade as shown
on said drawings, the top of which, along its entire length, shall be 3
feet - 6 inches above the top of the wall. The inner wall shall have
along its top a stone balustrade as shown on said drawings, the top of
which, along its entire length, shall be 3 feet 6 inches above the top of
the wall.
A wall shall connect the bridge house and the inner wall at the point
of the beginning of the inner wall and shall be as shown on said drawings.
Stone Facing of Walls:
The outer abutment walls shall be built as shown on said drawings and
shall be faced with dressed granite, hereinafter described, from an eleva-
tion of 4.67 feet above Chicago City Datum up to, at the ends adjacent
to the bridge houses, an elevation of 16.25 feet above Chicago City Datum.
This facing shall have a minimum thickness of 8 inches and shall return
on the sides and soffits of all openings in the walls. The top of this
granite face shall run horizontally until it intersects the top of the said
walls. Thence to the newel post the entire outside face of the outer
abutment walls shall be of dressed granite. The newel posts which ter-
minate said walls shall be of dressed granite up to an elevation of 8.5
feet above Chicago City Datum. The remainder of these newel posts shall
be of Bedford stone, herein described. The remainder of the outer
face of the outer abutment walls above the elevation of 16.25 feet above
Chicago City Datum shall be of Bedford stone. This facing shall nave
a minimum thickness of 6 inches. The balustrades herein described shall
be of Bedford stone. The outer abutment walls shall be backed over
their entire length with concrete to a total thickness of 1 foot 6 inches
as shown on said drawings.
The inner abutment walls shall be built as shown on said drawings
and shall be faced with Bedford stone above the elevation of 16.25 feet
above Chicago City Datum, except those portions of the walls opposite
and below the top line of the outer abutment walls. This facing shall
have a minimum thickness of 6 inches and shall return on the sides and
soſits of all openings in these walls. Below the elevation of 16.25 feet
above Chicago City Datum, excepting those portions of the inner walls
below and opposite the outer walls, the walls shall be faced with dressed
granite. This facing shall have a minimum thickness of eight inches,
38
1
The balustrades herein described shall be of Bedford stone. The inner
abutment walls shall be backed over their entire length with concrete to a
total thickness of 18 inches. The openings herein described in the outer
walls of the abutment walls leading to the basement shall be furnished
with hinged ornamental iron grills of material and design as shown on
said drawings, and the openings in the inner walls of the abutment walls
leading to the basement shall be furnished with hinged wooden doors
as shown on sa'id drawings.
Between the clearance lines of the outside trusses and the walls of
each bridge house there shall be constructed a wall of height and dimen-
sions as shown on said drawings.
These walls shall be faced to an elevation of 18.92 feet above Chicago
City Datum with dressed granite and shall be faced above that elevation
entirely with Bedford stone.
A concrete wall faced with 8 inches of granite shall extend from the
northwest corner of the inner abutment wall of the South Plaza a distance
of 23 feet to the northwest line of River Street. The said wall shall be
supported by two rows of wooden piles spaced 3 feet apart in each direc-
tion. The bottom of the concrete shall be one foot above Chicago City
Datum and the top of the granite faced concrete wall shall be 16 feet above
Chicago City Datum. On top of the said concrete wall shall be erected a
Bedford stone parapet, all as shown in said drawings.
A concrete wall shall extend from the newel post at the northeast cor-
ner of the South Plaza along a line at right angles to the center line of
Michigan Avenue to the east line of the Fort Dearborn Addition to Chicago.
The said wall shall pass under and support the granite landing at the foot
of the stairway herein described. The said wall shall be supported by a
row of wooden piles spaced 3 feet apart. The bottom of the concrete shall
be 1 foot above Chicago City Datum and the top of the wall, including the
concrete coping, shall be 14 feet above Chicago City Datum at the east
edge of the said landing and 12 feet above Chicago City Datum at the east
end of the wall, all as shown on said drawings.
A concrete stairway shall extend northerly from the said landing at
an elevation of 11.5 feet above Chicago City Datum to the floor of the dock
at an elevation of 5 feet above Chicago City Datum. The said stairway
shall be supported by concrete walls, all as shown on said drawings.
ELECTRIC LIGHTING.
On the sides of the roadway of the upper level of the said thorough-
fare between East Randolph Street and the South Plaza and located at ap-
proximately equal distances, 36 cast iron electric light fixtures shall be
erected on and securely attached to the concrete sidewalk herein specified,
as shown on said drawings. Each of the said fixtures shall be provided
with six incandescent electric lamp sockets with glass globes 12 inches in
diameter and with suitable insulated copper wiring and an electric switch,
and shall be connected with an electric circuit as shown on said drawings.
Each of the said fixtures, including the standard and all attachments, shall
be of the size, dimensions, material, and shall be similar in every respect
to the electric fixtures now in use on each side of Michigan Boulevard be-
tween East Randolph Street and East Madison Street.
On the sides of the roadway of the upper level of the said thorough-
fare between the Chicago River and East Chicago Avenue, and located at
approximately equal distances, 57 electric light fixtures shall be erected,
as shown in said drawings. Between the Chicago River and East Ohio
Street the said fixtures shall be securely attached to the concrete sidewalk
39
lierein specified. Between East Ohio Street and East Chicago Avenue the
said fixtures shall be securely attached to concrete foundations 2 feet
square by 4 feet deep. Each of the said fixtures shall consist of a con-
crete standard, an arc light attachment, a glass globe 20 inches in diameter
attached to the concrete standard by means of a bronze grille, and shall
be provided with suitable insulated copper wiring, an electric switch, and
shall be connected with an electric circuit as shown on said drawings.
Each of the said fixtures, including the concrete standard and all attach-
ments, shall be of the size, dimensions, materials, and shall be similar in
all respects to the electric light fixtures now in use on each side of Lin-
coln Parkway, between East Ohio Street and East Chicago Avenue.
On the upper deck of the said bascule bridge 10 electric light fixtures
shall be erected on and securely attached to the outer trusses. Each of the
sáid fixtures shall be provided with four incandescent electric light sockets,
with glass globes nine inches in diameter, with suitable insulated copper
wiring, an electric switch, and shall be connected with an electric circuit
as shown on said drawings. Each of the said fixtures, including the cast
iron standard and all attachments, shall be of the location, size, dimension
and materials, as are shown in said drawings and therein designated as
fixture Number 1.
On the balustrades herein provided for the upper level at the north
and south plazas and at intersecting streets 32 cast iron electric light fix-
tures shall be erected and attached to the stone posts on said balustrades.
Each of said fixtures shall be provided with four incandescent electric light
sockets with lanterns of bronze and glass 12 inches in diameter, with suit-
able insulated copper wiring and an electric switch, and shall be connected
with an electric circuit as shown on said drawings. Each of the said fix-
tures, including the stone post and all attachments, shall be of the location,
size, dimensions and materials as are shown on said drawings and therein
designated as fixture Number 2.
On each of the four safety islands which are herein provided to be
placed on the upper level of the north and south plaza on each side of the
center line of the bascule bridge, a cast iron electric light fixture shall be
erected and securely attached to the said safety island. Each of the said
fixtures shall be provided with nine incandescent electric light sockets,
with one lantern of bronze and glass 24 inches in diameter, and eight lan-
terns of bronze and glass 16 inches in diameter, and with suitable insulated
copper wiring, and shall be connected with an electric circuit as shown on
said drawings. Each of the said fixtures, including the cast iron standard
and all attachments, shall be of the location, size, dimensions and material
as are shown in said drawings, and therein designated as fixture Number 3.
At each end of the upper deck of the bascule bridge three cast iron
electric light fixtures shall be erected and securely attached to the fixed ,
portion of the structure. Each of the said electric fixtures shall be pro-
vided with six incandescent electric light sockets, with glass globes 12
inches in diameter, with suitable insulated copper wiring, and shall be con-
nected with an electric circuit, as shown on said drawings. Each of the
fixtures, including the cast iron standard and all attachments, shall be of
the location, size, dimensions and materials as are shown on said drawings
and therein designated as fixture Number 4.
A cast iron electric light fixture shall be erected on and securely at-
tached to the safety island herein provided on the center line of the road-
way of the upper level at the south line of the South Plaza. A similar
electric light fixture shall be erected on and securely attached to the safety
island herein provided on the center line of the roadway of the upper level
40
1
at the north line of North Water Street. Each of the said fixtures shall be
provided with an incandescent electric light socket, with a red glass globe
12 inches in diameter, with suitable insulated copper wiring and an electric
switch, and shall be connected with an electric circuit as shown on said
drawings. Each of the said fixtures, including the cast iron standard and
all attachments, shall be of the size, dimensions and material and similar
in all respects to the electric fixture now in use in the center of Michigan
Avenue near the south line of East Randolph Street.
Electric lighting circuits shall be installed to supply the electric light
fixtures herein provided for the upper level. The circuits shall consist of
insulated copper wires of the sizes indicated in said drawings, which sizes
are therein indicated by the numbers of the Brown and Sharp gauge. Be-
tween East Randolph Street and East Ohio Street the wires shall be en-,
closed in iron pipe conduits which shall be attached to the under surface
of the upper level. The conduits shall be of the sizes and location shown
in said drawings. Between East Ohio Street and East Chicago Avenue the
electric lighting fixtures on the east side of the thoroughfare shall be con-
nected with the electric lighting circuit enclosed in the conduit now in
place on the east side of Lincoln Parkway and the electric lighting fixtures
on the west side of the thoroughfare shall be connected with an electric
lighting circuit, which shall be installed in a 3-inch fibre conduit which
shall be installed in the parkway just west of the curb line. The said
conduit, including the manholes and covers, shall be of the size and ma-
terial of the conduit, manholes and covers now in use on the east side of
Lincoln Parkway between East Ohio Street and East Chicago Avenue, and
as otherwise shown in said drawings.
All of the said electric lighting circuits shall be extended to and con-
nected with the switchboards in the bridge houses.
Two hundred eighty-six incandescent electric light fixtures shall be
installed and attached to the under surface of the upper level of the said
thoroughfare between East Lake Street and the Chicago River. 282 in-
candescent electric light fixtures shall be installed and attached to the un-
der surface of the said upper level between the Chicago River and East
Ohio Street. 72 incandescent electric light fixtures shall be installed and
attached to the under surface of the upper deck of the bascule bridge. 28
incandescent electric light fixtures shall be installed and attached to the
ceilings of the machinery rooms and adjacent basements. 15 incandescent
electric light fixtures shall be installed and attached to the ceilings and
walls of each of the bridge houses.
Each of the said electric light fixtures shall consist of an enameled
steel reflector and an incandescent electric light socket attached to a cast
iron outlet box which shall be connected with a system of iron pipe conduits,
all of which shall be securely attached to the adjacent structure and located
as shown on said drawings.
Electric lighting circuits shall, be installed to supply the electric light
fixtures herein provided for the lower level, the bridge houses, machinery
rooms and basements. The said lighting circuits shall consist of insulated
copper wire of the location and sizes indicated in the said drawings, which
sizes are therein indicated by the numbers of Brown and Sharp gauge.
Twelve electric feeder circuits shall extend from switchboards in the
(Bridge) houses to six cut-out cabinets as shown in said drawings. Each
lighting circuit shall be connected with one of the feeder circuits and shall
be provided with a suitable switch and cut-out located in the cut-out
cabinet.
1
41
SPECIFICATIONS.
Portland Ceinent:
All Portland cement used in this improvement shall be sound and of
the best quality and shall be of a fineness such that 92 per centum will
pass through a sieve having 100 meshes to the lineal inch. Briquettes
made from a mortar composed of one part of said Portland cement and
three parts torpedo sand, exposed to the air for one day and immersed
in water for six days, shall have an ultimate tensile strength of 200 pounds
per square inch.
Mortar:
The Portland cement mortar used for the finishing surface of any
concrete and for the water proof course of the counterweight pits in
said: improvement shall be composed of one part of Portland cement and
two parts of fine aggregate, mixed with a proper amount of water. The
said fine aggregate shall be of the best quality of torpedo sand free from
organic matter, and shall be graded in sizes so as to pass through a sieve
having 8 meshes to the lineal inch and be retained on a sieve having 80
meshes to the lineal inch, and so that not more than 20 per centum of
the fine aggregate shall pass through a sieve having .50 meshes to the
lineal inch.
Aggregate:
The fine aggregate used in all concrete in the said improvement,
except for the said mortar, shall be of the best quality of torpedo sand
free from organic matter, and shall be graded in sizes so as to pass through
a sieve having 4 meshes to the lineal inch and to be retained on a sieve
having 100 meshes to the lineal inch, and so that not more than 20 per
centum of the said fine aggregate shall pass through a sieve having 50
meshes to the lineal inch.
The coarse aggregate used in all concrete in the said improvement
shall be stone free from dirt and impurities, and shall be uniformly graded
in sizes so as to pass through a ring 2 inches in diameter and be retained
on a sieve having 4 meshes to the lineal inch, provided that in concrete
of Class “B” all of the aggregate shall be of a size to pass through a ring
one inch in diameter.
Concrete:
Concrete of Class “A” shall be composed of one volume of fine aggre-
gate and two volumes of coarse aggregate and such quantity of Portland
cement that seven cubic feet of the concrete in place shall contain 94
pounds of cement.
Concrete of Class “B” shall be composed of one volume of fine aggre-
gate and two volumes of coarse aggregate and such quantity of Portland
cement that five and one-half cubic feet of concrete in place shall contain
94 pounds of cement,
All concrete shall be thoroughly mixed with sufficient water to form
a plastic máss and shall be put in place before it has time to set. Where
a mortar finish is specified the same shall be applied before the underlying
concrete has set and shall be finished smooth and true with proper tools.
All forms for concrete shall be substantial and unyielding and built so
that the concrete shall conform to the specified dimensions and shapes,
and so constructed as to prevent the leakage of mortar. All reinforcement
shall be of the specified dimensions and shall be placed in accordance with
the said drawings and shall be held in position until the surrounding
concrete has set.
42
t
+
Concrete of Class "B" shall be used where specified and for the struc-
ture over the lower level including the casing of the steel columns, girders
and beam, for all sidewalks, curbing, stairways' and reinforced concrete
slabs and floors.
Concrete of Class "Ą" shall be used for foundation for pavements
(except where supported by a steel structure), for foundations for steel
columns, for retaining walls, bridge foundations and for all concrete not. .
otherwise specified.
Sidewallcs:
The top of all concrete sidewalks shall have a finishing surface of
mortar one-half inch in thickness. All sidewalks that are not supported
by steel structures shall be five inches in thickness including the finishing
surface, and rest on a layer of cinders six inches in thickness, which shall
rest on the compacted graded surface of earth herein provided for.
Glass Sidewalk Lights:
The glass for sidewalk lights shall be round disks two inches in .
diameter and 7 inch in thickness. The disks shall be spaced 342 inches
apart, center to center, and supported on a suitable cast iron grillage,
which, in turn, shall be supported by steel bars and beams attached to
the sidewalk structure. The top of the glass shall be parallel and flush
with the finished surface of the sidewalk. The space between the disks
and above the grillage shall be filled with Portland cement mortar- and
carefully trowelled and smoothly finished in the same plane with the top of
the disks.
Curbing:
All concrete curbing shall be six inches thick at the top and nine
inches thick at the bollom and thirty inches deep, and shall rest on a bed
of cinders twelve inches wide and six inches deep. The top and exposed
face of the curb for a space of twelve inches down from the top shall be
smoothly finished with Portland cement mortar as herein specified.
Where retaining walls are provided by this ordinance to be built at
the curb line the finishing coat of the adjacent sidewalk shall be con-
tinued down the exposed edge of the walk and down the face of the said
wall for a distance of 12 inches from the top of the said sidewalkWhere
the sidewalk and pavement is carried on the steel structure the finishing
coat of the sidewalk shall be continued down the exposed edge of the walk
to the top of the concrete base of the pavement.
Concrete Pavement:
The concrete pavement herein specified shall be of Class "B" concrete.
The pavement shall be thoroughly tamped until the mortar flushes to the
surface, and then finished with a wooden templet, shaped to conform
to the curvature of the surface of the finished pavement, in such manner
as to leave a uniform surface..
Expansion joints shall be placed in the said concrete pavement along
the center lines of the steel columns in both directions. The said expan-
sion joints shall be one inch in width and shall be filled with creosoted soft
wood timber with the grain vertical extending the full depth of the
pavement.
Granite Bloclc Pavement:
On the concrele foundation above specified for granite block pavement
shall be spread a layer of sand two inches in depth.
43
The pavement shall consist of granite blocks of the best quality, of
uniform texture, without lamination or stratification, and free from an
excess of mica or feldspar. The dimensions of said block shall be four
inches in width, four inches in depth and from six to ten inches in length.
A variation of not more than 14 of an inch in the specified width and depth
of the blocks may be permitted. The blocks shall be laid on edge in
uniform courses across the principal lines of travel, and the spaces between
the sides and ends of the blocks shall not be less than one-eighth (18)
of an inch, nor more than five-eighths (5/s) of an inch.
On the roadway intersections the blocks shall be laid at an angle of
forty-five degrees with the center line of the roadway. The blocks shall
be so laid as to break joints in alternate courses, each course, so far as
practicable, to be of uniform depth and width.
When thus laid, the pavement shall immediately be covered and swept
with screened, dry, roofing gravel, free from sand or loam, or pebbles
smaller than one-sixteenth inch, or larger than one-half inch. The amount
spread shall be sufficient to fill all the joints in the pavement; the blocks
then to be rammed to a firm and unyielding bed and to a uniform surface.
After the gravel has been settled by the ramming of the blocks, the
remainder of the joints shall be filled with a paving pitch which is the
direct result of the distillation of “straight run" coal tar. Said pitch shall
be applied on the work at a temperature of not less than three hundred
degrees Fahrenheit. Immediately after applying the paving pitch and
while it is still hot, the entire surface of the pavement shall be covered
with dry rooſing gravel as specified above, to a depth of one-fourth inch.
Asphaltic Pavement:
The asphaltic pavement herein specified for the proposed improve-
ment shall consist of a wearing or surface course one and one-half inches
in thickness laid on a binder course one and one-half inches in thickness,
laid on the concrete foundation herein specified.
Binder:
The binder course shall consist of asphaltic cement and clean stone
crusher run of varying sizes so as to pass through a one-inch ring. The
stone shall be heated and thoroughly mixed with the asphaltic cement in
such proportions that 100 parts by weight of the mixture shall contain 6
parts of bitumen soluble in carbon disulphide. The binder course shall
be spread upon the concrete base while in a hot and plastic condition and
shall be rolled until it is compacted and its surface is one and one-half
inches below the finished surface of the pavement.
Wearing Surface:
The wearing or surface course shall consist of a mineral aggregate
of fine crushed stone, sand and Portland cement mixed with asphaltic
cement in such proportions that 100 parts by weight of the mixture shall
contain 9 parts of bitumen soluble in carbon disulphide, 10 parts of min-
eral aggregate that will pass through a sieve with 200 meshes to the lineal
inch, 9 parts of mineral aggregate that will pass through a ring one-half
inch in diameter and be retained on a sieve with four meshes to the lineal
inch, and 72 parts of mineral aggregate of intermediate sizes, provided that,
at least 5 per centum of the paving mixture shall be Portland cement.
Asphaltic Cement:
The asphallic cement' shall be prepared from the residue obtained in
the careful distillation of asphaltic petroleum or from native asphalt com-
44
bined with a suitable flux, if flux be necessary, or from a combination
of the above named materials, provided that the proportion of the flux
shall not exceed 50 per centum by weight of the asphaltic cement. If
the proportion of the flux exceeds 25 per centum by weight of the asphaltic
cement, only asphaltic or semi-asphaltic flux shall be used.
Tests:
When tested in the usual manner the asphaltic cement shall pass the
following requirements:
The specific gravity of the asphaltic cement at a temperature of 77
degrees Fahrenheit shall be not less than that of water at the same
temperature.
At least 9842 per centum of the bitumen that is soluble in carbon
disulphide shall be soluble in carbon tetra chloride.
The fixed carbon of the asphaltic cement shall not exceed 15 per
centum.
The melting or softening point of the asphaltic cement shall be not i
less than 100 degrees Fahrenheit nor more than 135 degrees Fahrenheit.
At a temperature of 77 degrees Fahrenheit, when tested with a Dow
machine with a number 2 needle weighted with 100 grams for five
seconds the asphaltic cement shall have a penetration of not less than 60
nor more than 80 degrees.
When 50 grams of the asphaltic cement are maintained at a tem-
perature of 325 degrees Fahrenheit for five hours in a tin box 242 inches
in diameter and 1%4 inches deep the volatilization shall be less than 5
per centum by weight of the bitumen. If a sample of asphaltic cement
that has been subjected to the test last described is tested for penetration
in the usual manner, the reduction in penetration shall be not more than
one-half the original penetration.
A briquette (Dow form) of the asphaltic cement, as used in the paying
mixture, having a cross-section of one square centimeter, when tested
for ductility in accordance with the Dow method, shall elongate not less
than 12 centimeters.
Mixing and Laying:
The mineral aggregate and the asphaltic cement shall be heated sep-
alately to a temperature of 300 degrees Fahrenheit and then thoroughly
mixed together in a suitable apparatus. The paving mixture, while at a
temperature of not less than 250 degrees Fahrenheit, shall be carefully
spread upon the binder course to such a depth that when compacted the
thickness of the wearing course shall be 112 inches. As soon as spread
the paving mixture shall be compacted by rolling with a. 5-ton roller,
after which natural hydraulic cement in the proportion of one barrel of
cement to 1,000 square yards of pavement shall be swept over it and the
whole then thoroughly compacted by rolling with a ten-ton roller.
Timber-General:
All timber shall be strictly first-class, entirely free from sap, shall
have been cut from live trees, sawed true, with square straight edges,
shall be out of wind, full size and shall be free from wind shakes, largo
or loose knots, decayed wood, worm holes, wane and other defects impair-
ing its strength or durability.
Piling:
All wooden piles used in this improvement shall be of Norway pine,
cypress or tamarack or other wood equally good for this purpose. The
.
1
45
1
piles shall be sound and straight and not less than eight inches in diameter
at the small end. They shall be so driven that the bottom end shall be at
least 50 feet below Chicago City Datum. The tops of the piles shall be
cut off at the elevations herein specified and shown in said drawings.
Yellow Pine and Qak:
Yellow pine shall be long leaf southern' yellow heart pine and at least as
good as the grade known as No. 1 common yellow pine.
Oak shall be good sound white or burr oak, and at least as good as the
grade known as No. 1 common white oak.
Buffer Blocks:
For the anchor buffer blocks, sound, solid and well-seasoned oak, en-
tirely clear of knots and imperfections, must be used. These blocks must.
be carefully sized down, as required by the perfect alignment of bridge,
and must be so adjusted that all blocks are touched simultaneously by the
tail-end contacts of the bridge leaf, when the leaf is in a horizontal po-
sition.
The horizontal timbers at the bottom of the pits shall be so sized by
the contractor that the counterweight boxes will touch the second timber
in its entire length, when the bridge arms take their extreme upright po-
sition.
Paving Blocks:
The paving blocks shall be cut from southern long leaf or short leaf
yellow pine or tamarack. Only one kind of wood, however, shall be used
on this work. The blocks shall be not less than five (5) inches in length,
nor more than eight (8) inches in length; but shall average six (6) inches
in length. The depth shall be four (4) inches, and the width shall be three
and three-fourths (394) inches.
The timber for paving blocks shall be what is known to the trade as
"prime” timber and of a texture permitting satisfactory treatment as here-
inafter specified. The timber shall be sound, air-seasoned, square-edged,
free from bark, shakes, large or loose or rotten knots, red heart, worm or
knot holes, or any other defects which will be detrimental to its strength
or durability. No second growth timber or loblolly pine will be accepted.
All blocks shall be made of sound timber and shall be free from any
defects which will be detrimental to the life of the block or interfere with
the proper laying of the same. Each block shall have at least sixty-six
(66) per cent. of heart wood.
The blocks shall be carefully protected from the effect of the sun and
weather before and after treatment and until laid.
With southern long leaf or short leaf yellow pine timber, the annual
rings in the three (3) inches measured radially from the center of the heart
shall average not less than eight (8) to the inch.
Creosote Oil for Timber and Paving Blocks:
The creosote must be obtained entirely from coal-gas or coke-oven tar,
and must not contain any admixture of any tar oil or residue obtained from
petroleum or any source other than coal-gas or coke-oven tar.
The creosote must be completely liquid at thirty-eight (38) degrees
Centigrade and not more than three (3) per cent. of the water-free oil shall
be insoluble in chloroform or benzol.
The specific gravity of the creosote at thirty-eight (38) degrees Cen-
tigrade shall be not less than one and three-hundredths (1.03) and shall
riot exceed one and eight-hundredths (1.08).
1
1
46
1
The creosote shall be subject to a distillation test as follows:
The apparatus for distilling the oil shall consist of an ordinary 200
C. C. m. distilling flask, having side neck not over two (2) inches above the
body of the flask.
The bulb of the standardized thermometer shall be one-half (12) inch
above the surface of the liquid in the flask, and during the progress of
the distillation it shall remain in the position as originally placed. The
distance between the thermometer bulb and the end of the condensing tube
shall be twenty-two (22) inches. The bulb of the flask shall rest on an
asbestos board at least six (6) inches square, through which a round hole
has been cut two (2) inches in diameter. This hole shall be further en-
larged by cutting six (6) notches around its circumference; these notches
shall be one-half (42) inch deep. The bulb of the flask shall also be pro-
tected so as to prevent excessive heat radiation by placing around it an
asbestos cylinder four (4) inches in diameter and three (3) inches high,
and resting on this shall be a piece of flexible asbestos board of sufficient
size to fully cover the cylinder; said cover having a slit cut from the out-
side edge to a round hole one and one-half (142) inches in diameter cut
in the center to admit the neck of the flask.
The distillation shall be continuous and at the rate of one (1) to two
(2) drops per second.
One hundred (100) grams of oil shall be taken and all percentages de-
icrmined by weight on the basis of dry oil.
Tested in the above manner, it shall give no distillate up to two hun-
dred (200) degrees Centigrade; less than five (5) per cent. up to two hun-
dred and ten (210) degrees Centigrade; less than twenty-five (25) per cent.
up to two hundred and thirty-five (235) degrees Centigrade; less than
thirty-five (35) per cent, residue at three hundred and fifty-five (355) de-
grees Centigrade.
The distillate between two hundred and ten (210) degrees and two
hundred and thirty-five (235) degrees Centigrade shall, on cooling to room
temperature (77 degrees Fahrenheit) yield solids.
The oil shall not contain more than three (3) per cent. of water.
Method of Creosoting:
The timber and paving blocks shall be placed in the cylinder and the
temperature raised by steam in coils to from one hundred and eighty
(180) degrees to two hundred (200) degrees Fahrenheit, and vacuum of
not less than twenty-four (24) inches of mercury produced and this
vacuum maintained for at least ten (10) minutes, and not to exceed thirty
(30) minutes, at the expiration of which the creosote shall be admitted
without otherwise breaking the vacuum.
Injection of Creosote:
The retort shall be filled with the grade of creosote oil herein specified
previously heated to a temperature of one hundred and sixty (160) degrees
Fahrenheit, this temperature to be maintained during the treatment.
Pressure shall then be applied and continued until the best practicable im-
pregnation of the timber is secured, using twelve (12) pounds of creosote
cil per cubic foot of timber.
At no time during the process of treatment shall the temperature in
the cylinder be allowed to rise above two hundred (200) degrees Fahren-
heit.
Asphaltic Filler:
After the wooden block pavement is brought to an even surface, it
47
u,
é
shall be swept clean, and the joints between the blocks and the expansion
joints shall be filled with an asphaltic filler which shall be free from water,
coal tar pitch, or any product of coal or water gas tar. It shall adhere
firmly to the blocks, be pliable at all climatic conditions to which it will
be subjected, and conform to the following requirements:
It shall have a specific gravity of not less than nine hundred and sixty-
five one-thousandths (0.965) at seventy-seven (77) degrees Fahrenheit.
It shall have a melting point of not less than one hundred and ten
(110) and not more than one hundred and sixty (160) degrees Fahrenheit.
It shall have a penetration of not less than twenty (20) nor more than
fifty (50), as measured and recorded by the Dow penetration machine in
the asphalt laboratory of the Board of Local Improvements, fitted with a
No. 2 needle weighted with one hundred grams, acting for five (5) seconds
on the material at a temperature of seventy-seven (77) degrees Fahr-
enheit.
The bitumen of the asphaltic filler shall be soluble in carbon tetra
chloride to the extent of at least ninety-eight and one-half (9842) per
cent.
Steel:
All steel shall be made by the open hearth process.
Structural Steel:
Structural steel and steel used for reinforcing concrete shall contain
not more than four-hundredths (.04) per cent. of phosphorus and not
more than five-hundredths (.95) per cent. of sulphur. When tested in the
usual manner it shall have an ultimate tensile strength of sixty thousand
(60,000) pounds per square inch. The test piece shall have an elongation
of at least twenty-five (25) per cent. in eight (8) inches, and shall show a
silky fracture. It shall be capable of bending cold one hundred and eighty
180) degrees flat without fracture.
Riret Steel:
Rivet steel shall contain not more than four-hundredths (.04) per cent.
of phosphorus and not more than four-hundredths (.04) per cent. of sul-
phur. When tested in the usual manner it shall have an ultimate tensile
strength of fifty thousand (50,000) pounds per square inch. The test piece
shall have an elongation of at least thirty (30) per cent. in eight (8) inches,
and shall show a silky fracture. It shall be capable of bending cold one
hundred and eighty (180) degrees flat without fracture.
Steel Castings:
Steel castings shall contain not more than five-hundredths (.05) per
cent. of phosphorus and not more than five-hundredths (.05) per cent. of
sulphur. When tested in the usual manner it shall have an ultimate ten-
sile strength of sixty-five thousand (65,600) pounds per square inch. The
test piece shall have an elongation of at least fifteen (15) per cent. in
eight (8) inches, and shall show a silky or fine granular fracture. It shal)
be capable of bending cold ninety (90) degrees without fracture.
All steel castings shall be sound and free from blow holes, cold shuts,
sponginess, pitting, shrinkage or cracks, cavities, and shall be thoroughly
annealed according to the best practice and true to pattern with smooth
cast surfaces.
Steel Forgings:
Steel forgings shall be made by the open hearth process, and possess
the following characteristics:
18
+
1
.
.
.
1
Low Carbon Steel:
Tensile strength in pounds per square inch.
58,000
Elastic limit in pounds per square inch..
29.000
Elongation, per cent. in 2 inches.
28.00
Contraction of area, per cent.
35.00
Phosphorus not to exceed per cent.
0.10
Sulphur 'not to exceed per cent..
0.10
Annealed Carbon Steel:
Tensile strength in pounds per square inch.
78,000
Elastic limit in pounds per square inch..
39,000
Elongation, per cent. in 2 inches.
22.00
Contraction of area, per cent...
35.00
Phosphorus not to exceed per cent.
0.04
Sulphur not to exceed per cent..
0.04
Cast Iron:
Cast iron shall be best quality, tough, soft, gray iron. It shall not con-
tain more than ten-hundredths (.10) per cent. of sulphur. The castings:
shall be true to pattern, out of wind, free from flaws, excessive shrinkage,
and any defects impairing its strength or appearance. All gray iron cast-
ings shall be made by the cupola process.
Test bars one (1) inch 'high by two (2) inches wide by thirty (30)
inches long shall support on a clear span of twenty-four (24) inches a cen-
tral load of not less than twenty-four hundred (2,400) pounds, with a cen-
tral deflection not exceeding four-tenths (.4) of an inch.
Wrought Iron:
Wrought iron bars and rods shall be of the best quality of manufacture
free from and mixture of scrap or steel. The finished malerial shall be free
from injurious defects and possess the following characteristics:
Tensile strength in pounds per square inch, not less than...45,000
Elastic limit, one-half tensile strength..
Elongation, per cent. in 8 inches, not less than.
22.00
Contraction of area, per cent., not less than.
40.00
All fractures must show a fibrous structure.
Phosphor Bronze:
Phosphor bronze used for bearings shall show a tensile strength on
test of not less than 28,000 pounds per square inch, conforming closely to
the following proportion's :
Copper.
100 lbs.
10 lbs.
Lead.
6 lbs.
Phosphorus
0.5%
The metal must not be overheated or otherwise injured in the casting
process.
Anti-Friction Metal:
Anti-friction metal shall be of approximately the following propor-.
tions:
Tin .
.84 parts
Antimony
. 16 parts
Copper.
2 parts
('ounter-Weight Metal:
Shaped counter-weight blocks and plates shall be of cast iron. · They
shall be solid and free from large blow holes and other cavities which are
difficult to fill with concrete.
.
Tin .
.
49
Pig iron as counter-weight inside the counter-weight blocks shall have
a specific gravity of not less than seven (7).
Steel punchings shall be clean and free of any impurities and foreign
substances.
Fabrication of Steel Work:
All workmanship shall be first-class in every respect, equal to the
best practice in modern bridge works, and in accordance with the following
paragraphs:
Reaming and Punching:
All rivet holes, after punching, shall be reamed except those in lattice
bars, and in buckled plates.
Wherever practicable, the reaming shall be done after the pieces form-
ing each built member have been assembled and firmly bolted together.
No interchange of reamed parts shall be allowed. The connections of mem-
bers forming trusses or other parts of the superstructure shall be assem-
bled, reamed, and match marked.
Riveted members shall have all parts well pinned up and firmly drawn
together with bolts, before riveteing is commenced.
Planing:
All sheared edges and ends shall be planed off at least one-quarter
(14) inch, where planing is required or indicated in the said drawings,
or where edges of plates and shapes exposed to view are not neatly and
accurately sheared.
The ends of floor beams, stringers and sidewalk brackets shall be
machine-faced to exact length and at the proper angle. Joints in truss
members shall be neatly milled. Bases and tops of posts, including gusset
plates and connection angles, shall be milled wherever they take bearing.
l'runnion Holes:
All trunnion holes shall be bored true to gauge, smooth and straight,
and exactly perpendicular to the plane of trusses and parallel to eaclı
other.
Riveting:
All shop rivets shall be machine-driven.
Rivets shall look neat and finished, with heads of improved shape,
full and of equal size. They shall be central on shank and grip the
assembled pieces firmly.
The pitch of rivets in all classes of work shall never exceed six (6)
inches or sixteen (16) times the thinnest outside plate, nor be less than
three (3) diameters of the rivet. In tie plates, gusset plates and splice
plates, the minimum pitch shall be three (3) inches wherever possible.
The distance from the edge of any plate, except in tie plates, to the
center of a rivet hole shall be at least one and one-half (112) inches. In
tie plates this distance may be reduced to two (2) diameters of the rivets
used, if otherwise the tie plates would project over members.
Bolts:
All bolts shall have a good bearing on heads and nuts and be provided
with beveled washers on inclined surfaces, and provided with lock nuts.
Latticing:
The ends of each lattice bar shall be properly cut and of, neat ap-
50
pearance.
Lattice bars shall be inclined at an angle not less than sixty (60)
degrees to the axis of the member for single latticing, nor less than forty-
five (45) degrees for double latticing with riveted intersections, wherever
the spacing for latticing is not otherwise given in figures on the drawings.
Stiffeners:
Stiffeners shall fit neatly between flanges of girders and shall be .
faced and shall be brought to true contact bearing with the flange angles
or flanges of beams.
Fainting of Structural Work:
All structural steel and iron before leaving the shop shall be thor.-
oughly cleaned of all mill scale, dirt and rust, by the use of steel scrapers
and wire brushes, and of oil by the use of benzine, and shall then receive
one coat of red lead and boiled linseed oil, mixed in a revolving churn
just before being used, in the proportions of twenty-six (26) pounds of
dry red lead to one (1) gallon of linseed oil.
Field Coats:
After the structure is in place, all the steel and iron work, except
steel to be imbedded in concrete, shall be thoroughly cleaned and painted
with a first field coat of Dixon's graphite or of Mindura Paint or of a
paint equally as good. This coat shall have a bottle green color. After this
coat is perfectly dry, a second field or finishing coat of the same paint shall
be applied.
·All finished working surfaces shall be coated with white lead and
tallow before being shipped from the shop.
Trunnions :
The trunnions shall be of annealed steel forgings and shall be care-
fully machined and polished. The trunnions shall have a light driving fit
in the structural steel web plates and shall be keyed as shown in said
drawings. Oil grooves shall be provided as shown in said drawings with
suitable grease cups.
Trunnion Bearings:
Trunnion journal blocks shall be of annealed steel castings free from
flaws or defects and shall be bored to receive the phosphor bronze bearing
sleeves as shown on said drawings. The phosphor bronze sleeves shall be
turned to fit the journal blocks and bored to fit the trunnions.
Operating Racks:
The operating racks shall be of annealed cast steel, and shall be
accurately machined.
Pinions and Gear Train:
All gear wheels, including the operating pinions, shall be of annealed
cast steel with accurately cut teeth. They shall be bored true with a light
driving fit on shafts, and shall be properly keyed with gib-head keys.
Shafts:
Shafts shall be of annealed carbon steel forgings turned to size and
smoothly finished over their entire surfaces. Fillets or tapers shall be
left where diameters change and ends shall be chamfered.
Shaft Bearings:
All journal blocks or separable shaft bearings shall be made of annealed
steel castings and lined with phosphor bronze or with babbit, as indicated
i
51
.
in said drawings for each bearing. They shall be bored to size for journal
and fitted to good bearing on journal when in place. They shall be fitted
with iròn screw and spring compression'grease cups with cup-leather pack-
ing. The grease cups shall be directly connected to the bearings, which
shall be provided with grooves suitable for solid oil.
The babbitt of babbitted bearings shall be thoroughly ball-peen ham-
mered in placed before boring. Where phosphor bronze is used it shall
be a good fit in the journal-block bore, which shall be concentric with the
shaft surface.
All solid bearings for shafts shall be babbitted and have a good working
fit on journals when in place.
Brakes:
On the third shafts from the main pinion shafts shall be installed
friction brakes of the post type so arranged as to be operated by hand
levers in the bridge houses. The brake wheels shall be made of annealed
cast steel, the rim face to be machined. The brake shoes shall be made
of annealed cast steel, lined with best wood fibre or equivalent fibre for
friction purposes.
On the second shafts from the main pinion shafts shall be installed
friction brakes and brake shoes similar to those specified for the third.
shaft, except that they shall be operated by compressed air controlled by
operating valves in the bridge houses.
Vain Operating Motors:
The main operating motors shall be of the commutating pole mill
type, series wound, waterproof, totally enclosed in horizontally split steel
frames, with suitable gear cases. The motors on each side of the river
shall be reversible and so arranged as to be operated in parallel and con-
trolled as a single motor from the bridge house.
Each motor shall have a rated capacity of 100 horsepower with a
direct current at 550 volts, and after one hour's run at the rated load the
temperature of the motor windings shall not exceed 60 degrees Centigrade
above the temperature of the surrounding air.
Centerlock Motors:
The centerlocks shall be operated by two series wound electric motors
of the commutating pole closed type operating in parallel and controlled
as a single motor. Each motor shall have a rated capacity of 5 horse-
power with direct current at 550 volts and back geared to suitable speed.
Motors shall be non-reversible. The motors shall be controlled by suit-
able interlocking controlling devices from the bridge house, and shall be
equipped with electrically operated brake.
Heel-lock Motors:.
Each heel-lock shall be operated by a series wound electric motor of
The commutating pole closed type. Each motor shall have a rated capacity
of 742 horsepower with direct current at 550 volts, and shall be back
geared to suitable speed. Each motor shall be controlled by suitable inter-
locking controlling devices from the bridge houses, and shall be equipped
with an electrically operated brake.
Indicators:
Suitable indicators shall be installed in the bridge houses which
shall show the exact positions of the centerlocks, heel-locks and bridge
arms.
'52
Air Compressor Plant:
The air compressor plant which shall be installed in each machinery
room shall have a capacity of 28 cubic feet of free air per minute at 90
pounds pressure. Each compressor shall have two cylinders of cast iron
672 inches in diameter by 444 inches stroke driven by a series wound
electric motor of closed type with a rated capacity of 5 horsepower with
a direct current at 550 volts.
Pumps and Pump Motors:
In each counterweight pit two electrically driven centrifugal pumps
shall be installed. Each pump and motor shall be mounted on the same
vertical shaft and shall have sufficient capacity to raise 360 gallons of
water 30 feet per minute through a discharge pipe 312 inches in diameter.
The motors shall be shunt wound, with a capacity of 10 horsepower with
a direct current at 550 volts. The pump and motor shall be so arranged
as to be operated from the bridge house.
Painting of Machinery:
Before leaving the shop all iron and steel forming any part of the
machinery herein described shall be thoroughly cleaned of molding sand,
scale, rust and dirt, shall have all irregularities of casting chipped down
smooth, and shall receive one coat of red lead and linseed oil paint in the
proportion of 26 pounds of dry lead to one gallon of linseed oil. The
said coat of paint shall be well brushed in and rubbed down, after which
a coat of carbon paint, similar to and equal in quality to Dixon's graphite
paint, or Mindura paint, shall be applied. After erection, all machinery
shall be given one coat of paint equal in quality to Rice's Oxydized Ma-
chinery Paint of white color.
Iclectrical Apparatus:
Unless otherwise provided in this ordinance, all electrical apparatus
and the manner of installing the same shall be in accordance with the
requirements of the general ordinances of the City of Chicago.
Plumbing :
All plumbing fixtures shall be of the best quality of porcelain with
nickel-plated fittings of suitable design for the purposes required. All
plumbing fixtures and connections and the manner of installing the same
shall be in accordance with the general ordinances of the City of Chicago.
Chicago City Datum:
Chicago City Datum as herein used shall be taken as the plane of low
water in Lake Michigan of A. D. 1847, as established by the Trustees of the
Illinois and Michigan Canal, and adopted by the late Board of Drainage
Commissioners and by the late Board of Public Works of the City of Chi-
cago, and now represented by the ordinance of July 11th, A. D. 1898, relat-
ing to the corrected elevation of the Old Lind Block bench mark, which
determines the base or datum for City levels.
Drawings:
The entire improvement herein provided for and the various parts
thereof not otherwise described shall be of the location, dimensions, mate-
rials and manner of construction shown in said drawings.
Supervision:
The entire improvement herein provided for shall be constructed and
installed in a workmanlike manner under the supervision of the Board of
Local Improvements of the City of Chicago.
i
WABASH
AVE,
E. SOUTH
E. RANDOLPH
E. LAKE
RIVER
WATER
CHICAGO
RUSH
ST.
E. NORTH WATER
112* CONDUIT CONTAINING 2 NO 4 AND
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E. MICHIGAN
o SION17713
E. INDIANA
E.OHIO
-------
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FOR LAMPS ON BRIDGE 1° CONDUITS CONTAINING 2N! 12
AND IN:14 WIRES
RIVER
ST.
ST.
ST.
ST.
ST.
PLAN OF UPPER ROADWAY
SHOWING ELECTRIC LIGHTING ANO WIRING
100
do
100
400
SCALS 1-100
ST. CLAIR
ST.
160
1602
494.74
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370.19-
14.17
$7.08
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310.39
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29.87
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PROFILE
OF UPPER AND LOWER ROADWAYS
Nole:- Elevations on Upper roadway refer to tast curb.
Elevations on Lower roadway rofer to center line of center columns.
Scala 1:30
1
RIVER
RUSH
ST.
E. SOUTHE WATER
'E. RANDOLPH
E. LAKE
CHICAGO
E. NORTH WATER
E. MICHIGAN
SIÓN17713
E. INDIANA
E. OHIO
CUT OUT GADINGT
1
¿ CONDUIT CONTAINING 2 FACÕERS or
2 N86 * IN:10 WIRES EACH
2'CONDUIT CONTAINING 2 FEEOER
or 2 N6 KI NI IO WIRES EACH MO
2 FEREAS EXTCNCING SOUTH
CUT OU CABINET
CUT OUT CADINGT
ST.
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2 COMOUIT CONTAINING 2 N:8 MINI 10 WIRES,
2 M161N? 10 WIRES AND 2 FCLOERS EXTENDIGA NOKTA
CONDUIT CONTAING 2 N:6X 1 N° 10 WEST
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CUT OUT CABINET
BEAU BIEN
CT. .
ST.
CUT OUT CADIXCT
ST
RIVER
ST.
ST.
ST.
ST.
ST.
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
1
PLAN OF
LOWER ROADWAY
SHOWING FEEDER CIRCUITS
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE.
INDICATES PIPE CONDUIT, DIAM IN INCHES
.
LAMP. POST
NO4,N:6 etc. SIZE OF WIRES, BROWNE & SHARPE GAGE
@
FEBRUARY. 1913.
do
100
200
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SCALE:1.100*
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Asphalt
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PROFILE
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Note:· Elevations or Upper roadway refer la cost curb.
Elevations on Lower roadway refer to center line of center columna
Scale 1:30
J
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RIVER
RUSK
• ST.
E. SOUTH WATER
E. RANDOLPH
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E. NORTH WATER
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Granite Block Paving
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CHICAGO. ILLINOIS
PLAN OF
ROADWAY
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
ST CLAIR ST.
FROM RANDOLPH ST. TO CHICAGO AVE.
LOWER
Scale: 1.100
FEBRUARY, 1013,
DRAWING NO 2
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Size of WIRES BROWN # SMARPE GAZE
BOARD OP LOCAL IMPROVEMENTY
CHICADO, ILLINOIS
6 the
100
SCALLIP,50
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROY RANDOLPH ST. TO CHICAGO AVE.
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BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
CITY OF CHICAGO
DBYARTMENT OF PUBLIC WORKS
BURBAU OF ENGINEERING
DIVISION OF BRIDOES AND HIARIOR
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH 8T. TO CHICADO AVE.
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BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORK
BUREAU OF ENOINEERING
DIVISION OF BRIDOES AND HARBOR
can goto
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IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
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GENERAL PLAN OF ATOS
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
+
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORK'S
BUREAU ÓF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE.
FCORUARY. Iony
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1
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Tabuldilon o soculars
Columns
22
464838-910#b! *25*3*** *2701064246433146'Oro
web plote 9x* web plote izre' inte plote isi
Reinforced Concretel Antorced Concrete Reinforced Concrete
Covarad, 12*8g. Covered, so se coverad, 20"og.
D
This Construction eilends
to Eogh Line örWobosh dv.
sinn
Distance from West une
inf Michigan Avc. to Eost line 1
of Wabash Are Obout 370.
2010"
108
This free for Sidewalk Lights
Tabujartar of Sectors.
sidemelk Girenog Eleocharms CuckGudac Rastorget
sei
FRI
RG
42696**-206 800406:624-body"-46*** stabdan
ortissimo
Mob Pute 28" 10" Mo Plate 272 Parto sort me b Pluto 25
SG2 Sumo AS JOJ
2007 Pins4.2018
CG2
This Arco for Sudowolt Lights.
4246673x4 bod biustrade Gradora
obPlate 3656
423-667 Sobou
Mo Pl_06
RANDOLPH GT
9:04
K
ST
kehase Sdnit
A
1
Le
Jo's
MICHIGAN AVE. .
& of Groning:
dolor
22:00
RAVST doo
od
100
2 ST-Beam
All these sudbomulk groters 18h58 r Bosms
All those sideneulh girders 20"-45"! Evens,
Lજાય
DE. 17120111
1911
42.
ben
9:12
curo
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curé
А
krea
96
dams
27
Curs
20*65*r.com
co
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Rotaining wall Type I
Ratotning wall Type -
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7-0
-
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c Of Roodwox
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TGS
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&
1
20*45s
IRGI
woll
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Rataning
Type I
9-29.
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85
fros
FA
Ratowning the eye erity Types
CG 22
CG
mi
Ili
it
xrot WHM
9118
15:21
Baran.
-
..
1
21.
141
This Arco for Sidewalk Lights
All these sidemolk
graders 1809
555. Sosem se
Leaction
378 27
19
-B1 Bulustabt Groter
20.0"O's
20.05!
168 21
Unibana.
iz-35 I boum
تهرا
18°. asteen
Ipanels emo': 15410
motif.com
doc"
2010
20.0
Loio
Parol
text
80 75
os
ht
Ilir
Cure
curo
This Arco fer Soderol Lights
Esportsion Jointa
L
Expansion Joint
қ
Esponsion Jointa
Esponsion Joining
MOOTH
57cee LLA
fornc
zil'e
167
Ah
310.990
aurrt pris
Streed
Groda
1% Gods
aisax accid
HIS SO
+16 SG
Grada
Pielforringe
Sudheen
.Fill
10
130
Chicagobatum.
1
Section A-a
1
Nole
Elevations on ypper level refer le cost curb.
lomer
me of roodmes
bias
27.
Bldeuinc
1274
Bild Liar
Blog Line
37:6
37.0
3786
37.6'
25:0 Guia de Lucha
:27:6-
25:03:
27,6"
-74 laurd to curbo
250
.
انا
-1000
I hari cerita
(147% Gagda
1973
1890
FRAMING PLAN, RANDOLPH to LAKE ST'S
Pularna rin.
Lopu Readroy-
sener
160
ܝܐ32ܝܕ
chicago Datum
3
za
19:40
illa
preifinisikan
+
۔
ssie
220
280
usio
33.0
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
Section L-L
Section K-K
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF CRIDOES AND HARVOR
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH 8T. TO CHICAGO AVE
7
FUN. D.
DRAWINO
1
5

-Cocorotobato o tob | 1tcco tobacomo todo
1
TABULATION OF SECTIONS
Floorbooms
E84
EB7
FBIO
tool
Web Plate 27% Web PI 10.1" Web P11022 Web P3,3
F92 Afhener 21.3.3 Stiftener 13.3" Stiffener 189378'
100%" x otobi F05
FBE
Web Pare 362/ I..Coach tot 167 dagbob
Ja'a
EBO Web Plate 10'' Web Plate 48
4.645/3615 tobuliner 4.99% Shiffener (49.39%
Web Plate 90"
F86
F89
16" }'67b|4L*6.689 1980 to
Web Plate 48x?' Web Pato 48%
Shiffener 243.8% Chillener 138 callBolustrade Girder B2 1:04
Gurb Gieden
TABULATION OF SECTIONS. Recdway Godere
Boluettelo
CG8
RGI
RG7
obtob 426,69 37/"btob
1
4.6 15% to b. Web Plate 35
Web Plate
heb Pote 57'}" Web Pore si Web Elate 253 Web Pate 1
Web Plare 10' Web Plate 488 12. Cover Pa 2.8-450
Suiffener 23, Sniffener (293) 2 Cover Fold'''' Istiffener L 413,7 2.Cover Dis. 1.320 - Cover Pis 1200
Columns
CGO
RG2
5 to
RGS Stiffenerl 3% 2.Cover Pls ? 180"!
Web Plate 5''
4. L'6963' hob 4.2616", des bob
Shiffener 13,8 i esperto
Stillene 04:31 Web Plote 37"}
Web Plate 90% Web Plate 488
Rent Concrete Covered, 1599
Shiffener 24,30%"
RGS 2. Cover Plow
cu
1 GG of drob CG7
44626,32' tob Suiffener 1998
4.16.08.2-16'b hob
Web Plate
58, 4*6.65766 tab
Web Plate 121
PL 1
Cover Pls lowed Plate 57%
2. Cover Ps 404
Reini. Concrete Covered 20'są
This area for sidewalk lights
Shiffener 23, Stifter
fener 24.311
2. Cover Pls. 170
f.blob-Plus/
MICHIGAN AVE. 15hiffener L'43"}
(Spacing or opposite)
Rent Concrele Covered 2059
SO.WATER ST.
TABULATION OF SECTIONS.
Sidewok Gideco
SGLASG2
GG6
Po 6, ul'btob 4 DSCa5fb tob.
Web Pl 22.30
Web Plote 453
SG3SG4 Stiffener ( 4133
200106 SGZR 999
Web Plate 302 1 S'JA. 453"btob
SG5
Web Plote 4511
40508 15/' tob. Stiffener 4":3,8
Web Plate 45
Stiffener 1.3
ALLEY
l's T Boom
9147
South Line of South Plaza
GGO
24.
76-
or
.
Us
521 kr
sed
ka
ct
CellC
42
А
Parma
GO
-
15*4444aana
Sidewalk 27.6
45
G2
CR
ca 2
ca
1360 Beams
COS
oo
C
Cg6
0961
109
co
cho
Cool
cie
C46
Co
chez
1262
676
Curs
ce
SC
COCO
3
3
3
1.71,01
Roodwpy
CACA
I_4
ce
11. Coa tway Singer-6442 Beame-
A Rooney Singers
CA
V5'. 12° 1 Beamt
CU
81
SI
%.
ce
CG3
GO
CG4
C41
c95
G66
cs
C3
Icon
C3
9
CE
09
GGG
CG6
G3 Laurb 646
C3
ICG6
,C9
CGZ
CGZ
coe
coa
Sco'l Beam
25.4
(so't Beoma -
7.
ext
V
web
1
EBC
macheta atmoel wow
ULCE
02
1995
ch
ज
so
Ice
CE
E
CH
ca
130.18
Boustrode Girder 02
94-F
130.0
9.
Susuram
120
ALLEY
278.74
on light /
This area for small lights-
Loss' Boom
20.0'
ALLEY
126
27
200
2821
2010
280
267
2G
26-28
26.71
29'92
29:9
at
1:21
J
I
H.
Espansion Joint
Expansion Joint
Expansion Joint
NORTH
Expansion Joint
Bild Line
Grada
.7348
Grade 20%
39 curte cub.
calfer
Pinoy
Gorges
CASA hoz
-
て
​163.18
Section A-A.
For Line or Columns near Sewer
Note
Elevations on vpper level refer to curb
of rodowy
1214
27.6
1910 telneen.culis
25-0
2716
bahcecube
25:01
Wys
FRAMING PLAN, LAKE ST
TO SOUTH PLAZA.
ruke
potom
Read
Priva
75y of short
Postolo'cls
of draw
hy
Analo ono' Cirs
mer
er sener
CO.sewer
city Datue
..cily Dalum
12301
Section J-J
Section I-I
Section H-H
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM RANDOLPH ST. TO CHICADO AVE.
8
FRORUARY, 1913
ORAWING
RIVER ST.
I
TAS
cs
sem
RO
10.32
RG.13 tot 2 Cover Photos
with
Auctos
Ho'o' !
Bolustrada Gerdec
TABULATION OF SECTIONS.
SIDEWALK STR GERS
ROADWAY STRINGERS
nil Sidowold Strongers not including All Abodundy Stringers including those
Balustrada Girder 34
those crossed by the Gurd line to be Crosscę by the Curb lino to be
le". Jo scams
15 42" I dooms
41:0 Wid
SIREWALL GIRDERS CURO GIROCRS
ROADWAY GIRDERS PLOOR ALAM
BG
Husin
moto wcietGB svistos
sri's no on sisene 1010100 luwoio roi blok
Web Plote 95918 Wob Plato stop
sor
Web Plate 488'. Wodotto 10"
laa
Stullanar vir
Shifener u disini z Corar Plates Wif***14 Batronor urisid"
G2:10
EA
1661671931a100 006169 17/0no shtrenor wriginal swoimi rog arod
Was Plata 1513 ined Plato 471/ PG 2:10 12:18 Wad Plaro ng S"
Surianer disit Suttoner vigor 4166/ 421 otoo Suoner w visita
Wao Plato 28
455-3175;%ob 406 to Swener i sovrions 100
Web Plalo 45.00 nuo Plota 47 p.
Stoltenor waisla
sis
Web Ploto 48
Stulisneri posisi
' 421 stod
wit
G@14:G.
Mob Plale 42/ 2" Mix07
Monument
90624 451stod BALUSTRADE GIRDERS 2 Corer Plates wij'xi'! FOX1
Wab Plate 50
2
mikroau669 stop
Stukener igid 108.6'6" *.35** DO ROKU 12302_2728 Mcb Plato 4204"
GIZZO 39 22745inch WCP PIJS
40 sid.1 21 666 X Cover Platos wit 37'lo
106 lobo 2 Cor Piston-so'ng web plate rid
wil zo'ig
Yeb Plate ist
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17 JS ZU
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Woo Plata di Wad Plate 435%
RGASZ Suicnar
um
14-69608454114-6**:$ : 953's son
SG
+1 696 to 0816100 CB 120 ro 28100
WeD PI45'n £"
web PI JS".
405131779 w2%
vullener u f'Jang Web Plate on
Rads
mod Plate 40*
A.6.
avcim/" tot i sullener 14.52
+4-6.6'**'-usýbad Wos Plate 48!/
PUKUL
och
WD
V6421870
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lador
Wod Plate 48:{*
O910-14X7
2 Cover Palas **/*3818 067 62!3700
2
wif* 2016 Was Platc 428
RG 3:
Shullener udis
qvcic and
40C
Wab Phalc 423/" 4066 Ani atos
COLUMNS
2 Corar Plates 1701Wel Plata 184/"
sol Bridge
Calle
2
/*.8010 F822:47
44 dijit 91 to b
ROS
1906 607 210.000
Web Pluto gigt
AV66 stod wad Plate 12:
15 in se concreta covering
Web Plata 18/*
a +3
bal
се
WED
A1 SIRA 12° 0 too
Sulle mer 3074 goteo
Web
Wcb Porc into one
Shilleneuve
8,50
Johor
15 in xq concreta cororing
Web Ay 30's
WIGS
Web Pl. 42 L
44 6'5" 160 ron
FA 14
wed Ploro
418-636; soja-o
wed Pl 50"
Ideas
20 1999 concrete covering
2 Cor Pr's 1454. 32g|
2 Cor PPS 20'2.9
4 634 6 0 to 6
Sultening 2.4ght
WCD Plate 154.7"
20 in so concrele coraring
F4.50 A
web Pl vorf
67:6
RG
I
& of Tower_
.
Hot
Z
24.0'
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RCE
114
ALLEY
Pauli
RO
14.42
ZETY
27
C7
57144
!
13
Kush
Chicago Ct, Datum
Section Y-Y
CP
10
& Boodsoogle
Zor Thrnien
soo
او د
fa27
MIGHIGANAVE
1875
ههعمه
Takuten Truss
143-6*260492604
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to sport
ti
1
521
su
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44-690***: 2017
جميع
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uomos
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fizjolisis
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60mm
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to
AL
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!
15:44
.
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ro.se
D]-indicatas Glass Seewald Lights
107
1
DR
-15742"
Proposed Doch Lins
CS
Keglustrade Girdar 8s
SGZ27
1
.100'
07:54
Balustrade Girder DG
STEEL FLOOR-SOUTH PLAZA
Note
Elowlions on upper level nahor to cont curb
lower
of road
Toront
BOARD OF LOCAL IMPROVEMENTS
CHIC100, ILLINOIS
t
40428
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDOES AND HARBOR
Chicano City Datum
J
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FAOM RANDOLPH ST. TO CHICAOO AVE.
9
Section AA
REORUAAT, 1013
ORAWING
I
}
1
as
delen
TABULATION OF SECTIONS.
Sidewalk Stringers
All Sidewalk Stringers to be 12"-35 I Beams.
Roadway Stringers
All Roadway Stringars to 50 15-42'
r Beams.
Foor Beams.
FA
425-64
308 a to b.
Wcb A. JOX
FA. 53
48-6-g'risida
Jof*0100
Web A. 30".
FA. 56 $ 25- 6*.6
36i6 to b.
Web Pl. J6",
,F.8 57 44-6° -6'egli
36t 2 toa
Web PI 36.6
F.A. 58 445-6°14'te
Web Pi 36*.**
FB 9 443 - 6*14" 36f"htoa
Web Al. J6ºrt
FB. 60 $ 45-6'14 30ť o to b.
Web P%. JO"igen
Sakni
+
sot bob.
Proposed Dogt Linea
Presepi Doch lune
Skoon
ste
Readroy free
For Column Sections See Upper Plezo Sheets..
25.09
i
"
o'
1
Concrete Carton Atration
cutian
Concrete Curtain Horriller
deso
2
0
1664
18
Curb hne.
#outor Truss
+
Curb Ling
Joig
glio
29;77
19:20
20:18
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معكده
310
Joom
& Tawery
2010
Tomoj 3 з
0.78
cauch liat
9
f Outer Trussa
1
Samoine
1
c
Corerore cu son safiirkon
.
Concrete
criain Porc
shesh
1
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ent
i oko
1.6
sut
• -
26:0
$_TRUNNION.
TRUNNION 2
Da korpooys
9:34
LOLLO
proposed Doct man
Zrent Doch Ling2
*اور
22
STEEL FLOOR, LOWER LEVEL.
1
RIVER SI
TOWER.
3r * Groot
TOWER
Grado
•$$* PIOLO Bose
55'pla
Based
CITY ANUMZ
4
LOCAL
BOARD OF LOCAL INPROVEMENTS
CHICAGO, ILLINOIS
Seeron sus
Section to
1
CITY OF CHICAGO
DÉPARTMENT OF PUBLIC WORKS
-BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
.
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE
10.
KIIRUARY, 1013,
DRAW
I
1
Clie
Indiceles
Sidemark
lights
22:02
Jasses
jon
13:315' sloeamsia
25:ai..
Buntdoes who
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8-9.
votado
CG
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TABULATION OF SECTIONS:
ALUSTRADE GIRDERS ROADWAY GIRDERS. ELOR AEAMS
A-7-0-10.
A.G,39-40-41-42-52-53.
+4-6'44'18 258 2100 426x63#-503 0100
Web Pl. "
Web plote sorgente
Sittening 4-4'19*2 cover pbles 1428 - 16-0*
E. 8. 63
2 cover piores Hit &0
426. s*x91x8-30ť b.xd
128-6'16''-Arýb.net
Sidfeninge iXXf
WCB Pl. '0". $
Web Pl. Biz
RG 44 - 45
440 6X6X7-50OOO
FA 6+
8-ll.
+606' - Joſ'a 100.
42-6'16'36-3560.000 cover piares por 150°
web plote soxon
80'$
Web P4.35
FA66-67-73-79
Shiffeninge is
2 Cor. PiS. 124'13-18'19.
RG17-48.49
94-95-112-114
413 óróxr-381 6100
418-6-16 soí'Atoo.
Web Pl. 50'.*
Web plate 38X
Sultening 43-4'10"s f
ROSO
F.8.66-68-69-70-71
AĽ676x381'oio
72 - 79-75-76-77-70
Web plate 38x*
80-81 - 82-83.
RO51
+0-6°16'**J8t's tb.
44 6x6x4 -3810b en %. 38'ſ.
Web plote 38***
F.B 84-85-86-87.
RG 49-56.
413-6'16'.* b.ro
406:666-50$'2.OD. Web PI.J83
Web A. 50 ago
2 Cor. Als 14.05'100'29.
Stillening u 413'**
F8, 88-91-92.
R.G. 54-57
+4-6133 JAYADA
+0.6'6'*.45**.top. WeD PI 38"-Ź.
WeD Pl. 45" 5"
2 Cor. PiS. 1998-290
FB, 89-90-103-104
4-6°26'350Atom.
2004. A's.ne''*'-16'0'
Web Pl. 508
Sulleningus 4"13)**
Shring 25.410g
R.G. 55-56.
418-6-677.9t'apod.
FB 93-96-97 99
101-111-113-115.
Web Pl. 99 %
2 Cor. PI's, 14"-39"0"
44-6'16'**'sot A.AD.
Stillening 2 41318"
WCO AY 50**
Stilfening us.'-3'.'
LURA GIRDERS. Fi 8.100-108-109
CG-13-14-15. 449-6'16'-5" SOG'ARD.
42-6'16" 4-Doo Web Pl. 50'
Web Pl. 48'18
2 Cor It's 14ti :30 Lg.
5tiffening 29'3'8?
2.Cor PIB. 1993:2049.
C 6.16.
Stiftening 25-4'rg'ont
+43-614.48toda FA 98-102-107-110.
WCÓ PV 48'.
i
429-6' 6':59 aton
Stillening us 8.3*.* Web Pl. 59*8*
C.G 17-18.
Stiftening 23.4'13'te
44-6' 6'4-48A100 FA. 105-106
wes P4.98***
44-616-3 soý rok.
2 Cor P14 14
med P1 508
Sristening u 4:19 2 Cor Pib. 7.30'29.
2 Cor Pis 14"-20"
C.G.-19-20-21-22-23.
448-6'16', 4:59 biebsnflening 4-x'g'.
8
web Pf. 59" **
Stiftening qarg'ri 41-6'16''4.97€ 2.000.
Web Pl. 7'
C.G. 24-26.
44-6*6***stý 106. liftening ongigos
Web Pl. 59'iga
8. 117-120-121.
2 Cor. Pls. 14 a£²129L9. 40-6'6'-*73 son
2 Cor Pik M11629. Web A 47
stiftening 4-4'03 Shitening 1-4'13'.t'
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Wed P. 5905
WED PL 48.3
Stilfening so'ng's sittening us - "3"
F3.119
COLUMNS
446-6°16'.*'-480 Del
C-2.
a wogo135-125 306
nes pl 0818"
Plore.12'18
2 Cor Pr's 108 38'29
Picint. Concrete Corered,1559
Srittening2-43
C-3,
443-623-16' 0.90. SDEWALA_GIRRERS.
Plate-154
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Aleoni Concrete Corered, 2059.
-
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C-9.
445-6'ng
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Fera
49.
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BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISIOY OF BRIDGES AND HARBOR
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM RANDOLPH ST. TO CHICADO AVE
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BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
1
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DBT.ARTMEXT OF PUBLIC WORKS
REAL OF ENGINEERING
ANVISION OF BRIDGES AND HARBOR
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CHICAGO, ILLINOIS
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CITY OR CHICANO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIV;SION OF BRIDGES AND HARBOR
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1
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IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
CHICAGO, ILLINOIS
BOARD OF LOCAL IMPROVEMENTS
PLANS, ELEVATIONS E SECTIONS OF MICHIGAN AVE
VIADUCT AT INTERSECTING STREETSE ALLEYS
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· *-10
4:-10
DIVISION OF BRIDGES AND HARBOR
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IMPROVEMENT OF MICHIGAN AVE AND PINE 8T.
FROM AANDOLPH ST. TO CHICADO AVE.
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
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DEPARTMENT OF PUBLIC WORKS
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West
لی
Zadata
OT
sý web
اننده
لك
of outer Tyss
Toner Toks
Innor This
Team lor Outer Truss
Sidewalk Brochar
same as shown abord
Фto oo-оооо
21.
000
000 0 0 0
0-0-0
Zs3234 rok
API HEASTB
-246754 modelis
Broctet 83
Zor faglige
보
​عليا
А
Bolts
29
Bracket seme
as shown abore
Bracket some os
shown above
Eat Bndge
27:04
O of
L1130"
Saint
-22-IZ' (rin Size) White Oct
545 Greosoted
la digesgro-g86
2 Oils Skolio"
Za digig. 2:8
PIA 82-8-2:8"
That
Elevation of Floorbeam 1-7.
Y sconto
B.
All Brackets on nearsido
of Hoor beans anke
Section A-A
sis
FLOOR
of
UPPER RECK
ZE
ar Channel
miesta
so
2760
kgton
16:0"
Diagram of Ugger Deck
Eloor beams, Brachets, & Counterweight
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AYE
Rivets &
Open holes to except as otherwise morred
FGOKUARY, 1912,
DRAWING 46
)
gtringert
Stringers
Stringer &
عندهار .
B'Hotes for Burth Plates
or floorboom
estilo
sincetine
witirol
A 3+1}.r.of
Asirodo
-Aspirato
"A soif.moja
Top View
zroʻG to C d Trussas
52.
<!!
Hote. Bend i am Top Flongo to porobolic curve with rise of 2'
oto
67
am
stal
Open Holes f
AS
Awiting
Dopragina
a doproga
garganti
Sophrogn
0
O
0
0
O
o 0
o
SOF OUTFIT
-2.25
olo
oool
le ar Tee Truga
- FIR BRONS.
-FIRMEMons-
4
Fill winxs
FIN Minna
bid
wood
OOO OOO
zak
80 gramos
A 27°8:00
Footboom
25
April: -6
Ne
4hraf
296
Web not to Project
obore back of top
more than one
4.6641
A progreso
o
OO
0
0
0 ooooo
O O O
OOOO
Dropsroom
Daarnogma
ol
Poool 1
Anel +
so
Aure
oom ou ponere
if
Trevor
ELEVATION OF
FreeFekam 3+27.
8 Holes for Turned Bolt
to be drilled in field.
Le or INNER TRUSS
some as ponal
sobre permediate
Ango'y on osoan.
Panels
some or soneri
Jactang termediate
Dop Mos shown.
sel
PLAN o BOTTOM OF COUNTERWEIGHT Box,
AL 6x4Kfost
HL-o'rasfondra
best
ostaat
l'Hats for Buckle Potes
Rirėts and Rivet Holes.
Note:- Rivets to be diameter
Open holes a drameter unless otherwise
noted.
Toe View
27 hoc toc of Trussos.
3'08"
2.2
!
Noto: Bend of Top Flange to Darobolic Curve with rice of 2'
O
O
o
o
hers..
hoof
wab not to
project above, oso
boars of top loto
0:01
oso:
0 000
COO 0000-00
000OOO
.
mon
e free run
10
10
Hof
of
to o
$78.6
O
O
0
0
TO O
B'Hobs in OS Log, Moor slide. Sto Plon or bottom on Cwil oox.
ELEVATION OF ELOQRBEAM 22:22
1
- Diaphree
qh Buchsie Pt.
o
o
o
17-9% to cor Floorbroms.
the in 0.5 legs for Buckle Plotes Section 00
2.4°3'53'08"
Webg
f'Holes. CED ostya
10
O
0
O
و... و و .
O
0.0
O O 0.0
o
어 ​0 0 0 0 00
Stringar 20
2- Fiks. kl
Stringer '16
.246.ff.
#filia
Stringers Hotel
2-26,7,8
Stringers 8ccolo
-26'di
2.Fil's syn
Tug
L -
Palerstar
0
Stanga
ADY ZAM
الووو
o
cet.'
ooooo
O
O
O
ELEVATION OF STRINGERS ÄRBc&b
SECTION 'D:D
Showing Diaphroom a
Diophragm R Similor,
MOVABLE PART
LOOR BEAMS
10.61
010
bolo
l'apan Halus
Sec Twy Plan.
1:13
10
OO
Thang doorloo
in Dona's als
only
BOARD OF LOCAL IMPROVEMENTS
CAICAGO, ILLINOIS
Oo
.
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRID ER AND BARBOR.
SECTIONAL: VEN QE BOTTOM ELANGE
Showing Bot ton PLATC9 Of counter weight Box.
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM BANDOLPH ST. TO CHICAGO AYE
FEORUARY, 1013.
47
DRAWING
-
40-16
. زن
'font
:وي . ه ه ه
of Budge
bo
I Bracket
yo
23
11
911,5
S4
56
36
PZ
PPY
or luter Truck
RI
RU
RI
S6
SC
S6
36
SS
56 Wilshod nor
Jimbors in the permet
کل
Zymmetricana baudte barner Channel
220dri INSAN
py
Blakle rate over
hoedduty
600 stoc. of Outer Trussas!
2
AU
$a_meon.
322
270'ctoc Tanes
See
SS
PY
SS
RA
SI
RI
RI
SA
RI
P
PI
RI
AI
12
17
Figures
x 26•28
7711
។
163
29
er lied Mateo
0-0-0-0000-0-0
o
000
o
les to come
T
yo 0:0
0 144-130
Ho 14'0"
si
5 €
Eo! Bridge
Summetrical about 1.7
Symmeincat soow ?
124
23
20
118
ol Inneciouse
Seet loser Truss
112
S4
54
Sol
JU?
TOOE
# of Stringers
3.4
TO S9
SG
53
RJR
S.10
97
RL
SA
S2L
9-12
59
96
S4
S.
SJ
9. //
Jd
35
R2
RUR
82
RI
9-10
R2
22
23
S://
$S
S 10
37
SO
S2P
RŁ
RZ
PIL
S: 16
S-15
Se of Outer Tous
21.
in
Se of outer Truss
24
23
20
18
12
10
o
Stringer Piagam Lower Deck
Quarter Plan
Scale :10
Stringer Diagram - Upper Decke
Quarter Plan
Scale 10
pa Hokes in Fs of Top Flange far
162
.: !
i Bolls ihrough Subpenting
Grind end of
120122.24''
le 20ml
Lule 17 Holcs m NS of Top Mange for
stringer to fit
272
1 of 20 22 55
6 of 20/21
Bolls Through Subplanning
Ihange of Ciwi
20
5 of 3 ofisa
21
Jof 307-3
14 Norilled Hats Both sides of Top Flange for Turned Borts,
Truga
Dried Hoberg & Hermed on Coşting ger sheet sro 79
Holes in fs of Top Flange of 513 only (sce Brur '86)
for future Paul Cups
00:
4wgiji 1:11
I Fillo:1:125*rs of $13 only
fshop rirets
206
2 fills 8102
web niin
20664:10
Z rolls 70-8°
Omid on S:12
in S12
2u6izin
2ucidio 911
0-0-0
0.000 0000 0 0 0
K Holes
Holes
fror il'Hotes connecting Top Plate of Gfwt Bor to stringer
Holes
& of onrekel 86
_2.0
Stringers $12 5:3
13:41
gry
o Holes in Top 1789ne or 5-10 AS-14 only sano es in 5-12
rb Holes on SH only (see Brity 28)
Stringers SH.S11&Sh same as 512 6 54 or copt
fills 80%* 1'21*SM only
2538
For
details of ye routes in the range Shop pivots no SACSW
Omil an SO I SU
Wed HX7*
2u Sirig
Strinsers H10. SII
, 3:14
144PL & PUR
14ctos l_Cloerkama!
140-Ra
La Nokes on Top Parige of St only as a S2P
'Hakes oath Ilanges from Buckle Pasley
il: 40'I Beam
26/10:9
Lucidiront
bu milliomi*
15:42*/•Beam
Rivets and Rivet Holes
Oorizon near side o RJA
Note:- Rivets forameter
Copers of RSR
- I Holes
35 same as SH vcept as roled
11 Holes
goan nolos f diameter except as noted
Stringers $4855
Stringers. Pl. P:2.& RP3R.
1
Lower Deck
11'8'c to c. of Floorbeams
1:78
302:10; 28:71
(Drill notes for 3 Turned Bolts doll sides
Há ste cel Fleeckeame
Loof Top Flange for future Rail Clip
of 1'u0.7-99
-1011
şof 1:117.2:8*
W:
Teri Bart's on Sulplanting
Holes
Hokes a Top Flenge same as in SJ
2009
12 Tila o'yir09
2 rilis 101
20i
Web !
Krills 8770
2033
alib 3:10
842w6idizioloj
lo
Login;201012
iugiisin
Wed 141.3
Izbivifiolasa
ir
Lucidiola!
ED.DOC
0 0-0-0-0-0-0-0 561
Lit Holes
:I Martes
hacering
HI Holes
Liga tob of
Holes
Still 71 Vidiss SA 711712091*
Stringer-S6
Ws Bolls with Washers
Stringer S:9
0 0.0
Lower Deck
TAS)
AVIE ZOTEM wes"
Lower Deck
41*
118 cto cerclearbeans.
20:*
| Anoles
rs Top noc
1971
zor
11017
Lord
60120 ili
S2 only
3:0*
del
/o.
re NS.
figitu
Holes in Top Thange of 52 from BANCI Sveplanting
Terror Wear Sie.
Iuststiline
Le Notes and Top Mange for FBolta Hech Supplanking Omit nats in Top Flange in 30
son
# Nato do in Sa+517
only.
A fills 31:7071
15:47. Brom
urtout for Jhullin 51,2,717
Bracket BG
15:47"I Beam
261.0',
-Helesi 517
20860's autocricil*
17 only
At ang of Chord Covering
S8 same as S7 ercept as nated
L'Holes
Stringers S2 same as STeccpt as noted.
Cope for Jida
sce Lewer Stringsr Anagran
VI Holes
: Holes
017
52
Ştringers -SIR&S2R
Stringers 9-7& 5-8
Lower Deck
Lower Decks
16
TOA
so
2:01 JES Drill holes for 'Turn Bolts doth sides
STRINGERS
ser
6. Top llenges for future fail Clips
A Mokes 7's Top rige
MOVABLE PART.
of 2018
go for und 1673 Haris
i NS
in subplanking
Holbog 10 Too Floor Bolt Horgungo cuore Automobile
Puzete se
131
Nating
I DHS 7017 2 SITO
27,
20:12
Tufnele for JX Shaft
point 24.
MCD Mtir
12°C 250 126x34x
Lu64.40103"
Hales Ford Ballist
12crizirllri fel
ujiijin
-Ploiallots
Xx06-0-
L'Holes
Top or Stringers
It32 to bord
schonnel on top of
Floorbeem 20-20
BOARD OF LOCAL IMPROVEMENTS
atwit Box at 23-25
CHICAGO, ILLINOIS
Stringer. 33
Sidewalk
CITY OF CHICAGO
Stringer 5-15 & 9-16
Lower Deck
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
DEPARTMENT OF PUBLIC WORKS
FROM RANDOLPH ST. TO CHICAGO AVE.
BUREAU OF ENGINEERING
48
ILIRUARY, 1913.
ORAWINO
DIVISION OF BRIDGES AND HARBOB
rid Holes
cutive,
0-00
0-0
* Hoks rs Top Menge}
of Imer Trus:
0
or Bridge
0.0-0 0-0-0-
O
:اف
2u jijini
هي ته: وی
7:52 :*:وه
هو:// :/ of
Fill 70*.csssisa
i Holes in res of Upper rige}
dia. N.S
} Stanly
000
و:م:ة اعيا
به ده وی
196} voru Bolts
I
ܗܢܐ
1
to?
li
Niecot this paint
24-105 Top of costings curved' to match crown in Rocches in Monoble Leod (See sbart. N.
1125"
Hote. Section Z'Symmetred N10-01
-8-16 this painted
Section about
Suchan
Section
Sachee M
Noto
Dimension Nrarios according to crown of upper
roadway and should do as required by actual measure-
mont on bridge ofter moradlo leor nos Deen lowered
and olig ned.
Section
Section
Nordi-
31 36 to & of
Tonion
P
be
7:116 Mol or Anchor Column
10. 12
al
varied from 7 to 91°
Todor Roodudes (Aghult
Dimension Dºro de avokos required
by octual meosurement on bridge after
meroble leef has been lowered Morable port
ond olignad.
izko
Fixed Port
Point 24
Adid Gord Ly
(Guard Timber cut to ft.
Jover casting a timber
2
nu
Asamon
ziedi
2-08
3-zél.
SECTION oo
FRONT VIEW (Fixed port)
D
Mioplantz.
Milked vert?
Mid Vanda
E acrom
Mildvanta!
Chlupat
2
Grogorod.
it
bles
OHO
,
Variable from 567
Buerske Porn
(38.01 Pivot
. Bolte Timod to host
drive fit
Floricom 22-2-
| Note ²
Hole in costings
to be drilled inshop
Holes in Floorboom
to be called in hield
offer Leof is lowered
and aligned.
iu. Balla Luna
to light
metrive fort
Fixed Port
Quba xa
Plose base)
on costogos
NO-
Le of Insor Fuss
PLAN OF CASTING AT BREAK IN ROADWAY
Clearance
wag agd
To cantar of Pirot
voble Port
Balts in Cs to an ined part
turned to light chia nl
Mote
Hokes in cootings ond in
con tilaver broersar (ned port
to be drilled in shop. Holes for
cooting bolts in Floorboom 277
to be drilled in field to allow for
ddjustment
SECTION THROUGH BREAK IN ROADWAY
Upper Decr
Ścolo 11.10
-Movel
Section A
Section 8
section =
Sechon 'C'
Sachar B
Section 6
SECTION THROUGH BREAK IN ROADWAY
Lower Deca
Scale 11.10
128
sorg to BS
مه
483
137
del
1210
soll'
om og
4'6'
35
27-0c pa of Truss
Section of
A except for
my tongast port of end.
24-108 curred to at Top Flence of Floordeon 22-22 (560 gbear.
24
z?
21
'ی
22
"
او
3:sed
1700 of Chord Cover P.
Top
Rapohay
ad
SECTION EE
Top om Chord Cover A.
-Segrond Hedds
.
REAR VIEW (Morobte port)
1
Rod a
so'o'Rod. to Cof Avot
(Cassing to be filled to sito
om Loron Steel Co correll
Section 129 / 143 o abown
Vo provide for future cor troca
-Max, Mut
E
ܠ
FRONT-VIEW
(Fred Pert)
Malled Jant.
Worst af
SECTION ĆC'
Sve longe detail for
drensions of cista
rol'
-30
HALF SIZE DETAIL OF CASTING
Upper Dears
6
ord
4'g'
a'g'
32'
6'
A
Notas-
Caslings shall bror on their supports
the entire langih, ony wnoroidoble irregularites
inlerols, must be overcome by shim plotes og
proper thicdness
All bollo to be turned to hght drive
fit, unless otherwise noted
All holcs shall be drilled and roomed to
eract size.
loo olo ole ole ole
21
headed
Fixed Port
Ensit of Gurb
.- PLAN OF CASTINGS AT BREAK IN ROADWAY
Material - Cast Steel
Scale 11F7
Nagide dark
E of Toxer Truss?
22
Radek
B
inside af din Good Timber
2 Hole for l'Bolt tol
fasted Guard Timber)
Ingide of 611? Guard Timber
Col Hole Per Il Bolt nogton
Guord Timber
Tobory To
ead 2
Movable Port
OOOH
OOK
oo
2
HALF SIZE DETAIL OF CASTING
Lower Deck
Cast Steel
L.24
Lot"
zat
zar
2:7'
BREAKS IN FLOORS
..?!?
ziz. 121.246
'
..: S
.
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
XUREAU OF ENGINEERING
DIVISION OF BRIDGES AXD HARBOR
Müled Joint
Costings to be fitted to sido
o' Lur'oin Steal Ca Cor
irgil Section 129 0163 85
shown to provide for future
cer trocos
An
SECTION BB
BOARD OP LOCAL IMPROVEMENTS
CAICAGO, ILLINOIS
3.
TEL
PL
PIN
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE
FIORUARY, 1913.
49
DAWIN
SECTION AA
See large detail for
dimirising or esta
REAR VIEW (Movable port)
inor
1
1
ayn
For Brocter 865
4:9
WGZ'
A.-
of Bridge
Ssere crrec LUZ Shplagpad. Grasotad)
Symmetrcal about
Bolt with Master
1
1 Bart through Gun at
Aanet 2 Scc Scott
Sclearang the
111'ro Outsiate or
at point 23
13'Plants to be fitted arou
around)
Brackets of floorbaums
id"
Balls with Washers
(Guard L
fin auto A apgrease
Gusset
MYTHS Creartd
Struped Crewind
الهمه
... of Inase Tous
Bolta
GE" wauto at Gurdareggered
KYTARIOS
proven
315
(Brackets at Floorboans
गगनगन
ELE
!ונון
Lao
***
colonnine Out SA
Creasonal
Il sotme
NY
ho
IYU
IP
NO
NI
nrn
ra
IT:
nat
.80
1.4
HIS
40
1
U11
O
ISI
of river whernel
thes hoes
pile SAS
Creosoter)
Tur
I
UN
Lu
Itik
151
0 0
Site
THE
fa
VIL
FE
.
PU
E
短
​N
K
-
S
20
I
*
.
1000
*
ITINI
u
INI
山​在
​IST
1915
or creabiled Blocrt
.
hu
1 11
1 111
IHU
pojos para sus opnuodas Hus
7iJ31
Sie
YA
1 il
ICT
Sas:
18 at an în el calz"Guard
7:
0g of Trusses
Bolto
wodach
& Planting
IN
Detail
Bowing areat la cloer of Lower lock
3.
Scale nilig"
111
प
距​游
​Home
fcasting
o Csainnet
See End floor sem tekul for
B
"
313131
2 Wote Out $45 Creosoted
Twarped to curre of Rodway
de
1818
An
CE
SISIE
Guard a
Lier
!!127
ficuts will ap grease.
din
VCT
N1411
JERU
VIN
开拓
​Bolt
Bolts with
H9X!
TT
031
TSU
!
BERRIDE
33RIIKARI
LATE
WOOL WII-II
340 Lego za
37
10 12:21
ALL
Bols
WNICOT GUT solad
SW Crcosaico
handhillo
SALE
Ikel L'OR
Dragers
Darredo
1 of 1
6 of Hill Arcane
girry.RS4 Cool Stringers
LA
TE Plantelsa. Gipesaded sockenfell
10.
Fi-zes's stringers
Jure Strangers creadores
relac
bis 3 Lups 7:88°C
or
SE 온
​- Bulls
FÅ. Bean.20.20
67 Guind Cradalona
of Outer Trus
Exco si stringes
Detail
Showing Broer in ker Urrer Doct
Scato V:/8"
vasif Lugh unliğe Deoil,
A
1. Boom 10.18
Plan of Lower Deck
Sheway Mathed o Astening subplanting, guard Tinders
and Details of dewound Chord cover
Teachandrail Scolo.70
17:10 to a Trussian
1
Bots with Washer
Checkeros Pl.
Bon.
2 Plonking
Ornamantal hand roll as
shown in architectural
drawings
| zio"
2"
23
rin curs with Cup Grease
Bolt
Fill Cuts with Cup Grease
posle of floor dean
d'Pools
18.0 Clear induary
34.6Lag Screws 7:6 Cirs.
fidar Guard
-6•14 White Out Quand S.AS Greasoted a
Creosoted Blocks
Expansion Joint
-Z'YP SAS Creosoted Planting
Asphaltre Filler
776 YP S13 Creosored Subpinking
2²2= Bolted to each
Jin'Stringers
Stringatan
#stpp smp kopped Creosored
12°r. Planking JAS Creosoted
Boll tastening noiling
urip roc
06. rasher
Typical Comection of
Suplenting to [loorborums
sálirpSAS Creosoter
**F'YP SAS
$or Outer Truss
2791) Cor Trumaira
# Bolt
BE14345
HCreosoted
24°77343 Crearded,
2 Bolts with OG Mushers
Bhole
jisiji0-69
Delal of Luas
por estening Parts
1
O.G. Washer
'Balls with Hussher-
Section Showing Brook in
Sidewolk on upper Deck
Summetrical okout 2
of Bridge
Carriage Bolts
(barriage Belts
Yurth Ber Wochers)
-Sininger
LOG.mishers
- Bolt with Nashers
Section 8.8 (Lower Deck)
zu
2018 itdGalronized)
هههههه
2:18
coton
Blact, potomenica
Doctor
De
Madali?!
every 6.00
270 OC TAUSSCS
Not d'energia
VESKE
1991
Tocopied
Section 11. of Lower Deck
Showing Polos Systnuchen
Scale 1:18
(6°C,anc,
LONGITUDINAL SECTION Shorring Fastening or
Blocks to 2 Plonk Flooring
Scola I.NO
FLOOR
LOWER DECK
CITY OF CHICAGO
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
DEPARTMENT OP PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE
50
FILLUARY, 1912
ORAWING
0
Cast Iron Counterweights.
Locx L Gift: fitting loose oror rivet neods.
Counterweight required
for entire Bridge and included in Superstructure
Contract :
Shaped Costinga
500 Tons:
Pig iron ond Funchings 700 Tons.
Concrete e 145lbs.perl cut? 1100 Cw.yds.
Location of Pie iron and Punching in
counterweight Boxes to be giren loter.
Inner Trues
picol Section thru Conrer,
for sacrion noorende seccien oross Freina, .
25
이
​Inner Truss
1.78:2:4-521 Id!
PI123i* 2:84
foto
12.618
14 or6i26:10.N.S.
14 Bibit* 7's S.
Girder 25-26
Pla Izario'
Ilore
Drwg
12. réu!
14 635
..
PEG
1090
172
000 0.00
14.673
/ وع. ::.
;
18!
go o
VES
foto dr
Woo
Ispl. Pl. 94.60
IPI 12tr/
IP71247
CtQuter Truss
19-34
Diogram of CI. Cits.
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CHE
14.67
17 of
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CITY OF CHICAGO
DEPARTABNT OP PUBLIC WORKS
BURBAU OP ENGINEERING
DIYISION OF BRIDGES AND HARBOR
No. :
ko
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.9;6:47.721 ildl
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
ERGINOP
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM RANDOLPH ST. TO CHICADO AVE
58
FEBRUARY, 1913.
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CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
2 < 4
.
1
-0-0000-00
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
;
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST
FROM RANDOLPH ST TO CHICAGO AVE
52
FCORUARY 1913
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9320100_01_
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COUNTERWEIGHT BOX
BOARD OF LOCAL IDIPROVEMENTS
CHICAGO, ILLINOIS
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST TO CHICAGO AYE.
53
FEBRUARY 1912
DRAWING
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pour
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1
CURTAIN ON OUTSIDE Trusses
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
IMPROVEMENT OF MICHIGAN, AVE AND PINE ST.
FROM RANDOLPH ST TO CHICAGO AYE
CITY OF CHICAGO
DEPARTMENT OF PUBLIC_WORKS
BUREAU OP ENGINEERINO
DIVISION OF BRIDGES AND HARBOR
54
FROMUARY, IDIS
ORAWING
B
87
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1171201
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Ju Shred Ma s6
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Operating House
Plan of Upper Deck North Approach
Opera House
ILIWA
Opardt House
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B
2:21
1
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0
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shaded Lines.
39.26
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22:
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0
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27-29
22.82
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20
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Plan of Fixed Part.
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UPPER DECK.
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0
1
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1
4
1
interior
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444 - نیک 2
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39:24
2562
15:30
39:26"
Open
FUED PART
of Truss
ridgeمي
Ed of Truss ง
0.
por detail or connection
dink and or strey sme
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ce of Ancked Cod
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BOARD OP LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
cboerese talla
1
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
Section A.A
Concrete molt
Cha
saper
Operat House
Opergi
Moust
Plan of Fixed Part.
LOWER DECK.
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM. RANDOLPH ST. TO CHICAGO AVE
55
FTIRUARY, 1912.
PRAWA
1
Wario Mochinery Room
sidi
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47:0
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154
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./11.1
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75g
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540*
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EIXED PART
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SECTION C-C.
See Sheet 1 of 2 for location of Section
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE.
56
PEORUAKT, 1913.
ORAWING
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Rivets-1' Diam. except otherwise noted.
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Field holes to be reamed and pieces
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complete in shop
Rivets in lacing & diam.
.
Single Lacing 3 (Bottom)
€ Truss?
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OP ENGINEERING
DIVISION OF BRIDGES AND HARBOR
Tie PLCX7410 (Top)
Tie P.145. Bottom
6
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO. CHICAGO AVE.
FEBRUARY, 1913.
57
DRAWING
TAY.Z...1:11"
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BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
Section -'HH
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CITY OF CHICAGO
3-5.75 (5'9'n
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BOARD OP LOCAL IMPROVEAFS IN
CHICAGO, 11.1.1.NOIS
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CITY OF CHICAGO
DEPARTMENT OF PUBLIC WOKKA
HI:KRAL' OF ENGINEERING
DIVISION OF BRIDGES AND HAKISOK
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
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BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS 1
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU. OF ENGINEERING
NIVISION OF BRIDGES AND HARBOR
Rivets and Rivet Holes.
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IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE
FEBRUARY, 1912.
Castings
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BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF. BRIDGES AND HARBOR
IMPROVEMENT OF MICHIGAN AVE AND PINE ST
FROM RANDOLPH ST. TO CHICADO AVE.
64
FERRUARY, 1013.
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CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION O" BRIDGES AND HARBOR
BOARD OP LOCAL IMPROVEMENTY
CHICAGO, ILLINOIS
IMPROVEMENT OF MICHIGAN AVE. AND.PINE ST.
FROM RANDOLPH ST. TO CHICADO AVE.
65
PEOKUARY 1912
ORAWING
1
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23:1. bock to back of 25
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- Holes
Top View
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22-8"center booringło center Girder
Mascotas ng
Ares for Girder E
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FLOOR SYSTEM
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1
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E
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE.
DRAWING
66
FEBRUARY, 1913
mm
1
1
Holos
Anchor Coll
Top View
Lear. Ancher code
316 Bock to Bock of
27-0' center to Center of Anchor Cab.
dad
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0000-0
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24-513171,390?
2. Fills - Illud
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8
2- Filb-16
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do
81
2-4-616FZ
01
10
1
Bottom Section
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Holes for Buersted Pls.
A-Center to Center of Groers
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ooeeooo
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24-31241
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30-08 29-108
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0-6-0-0-0-0000
Sketch -B
17
12'
See Tole
FLOOR SYSTEM
FIXED PART
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
S
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
1
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM RANDOLPH 8T. TO CHICAGO AVE
FEBRUARY, POLA
67
ORAWO
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E of Outer Anchor Coy
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121
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FLOOR SYSTEM
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GIS •
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
1
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
Pirets diam
Open holes id except where otherwise noted
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM RANDOLPH 8T. TO CHICADO AVE.
PRIRUARY, 1913.
.68
1
1
DRAWI
1
roles for everted pls.
6
34-sd center Reping to Center of Girder
34 101 Boca to Bar of į
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Sidewalks, Stringers AB, A1, A2, and A3
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FLOOR SYSTEM
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Rivets and Rivet. Holes.
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Girders A4 A5, A6, ond A7
1
BOARD OP LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
1
CITY OF CHICAGO
DEPARTDIENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
? IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AYE
69
FINAUAY. I.
ORAWING
+
1
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BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
***
.9:/
It of Wall
CITY OF CHICAGO
DEPARTMENT OF PUBLIO WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE
DRAWING
70
FCORUARY, 1013.
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GENERAL ELEVATION OP MACHINERY
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BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
CITY OF CHICAGO
A
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARDOR
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE.
71
1
FERUARY, Ion.
DRAWING
Section A-A
1
List of Basring Roqunod
MO
Haber
AZ
8
au
8
Dilan of Shaft Length of Ause | mdth of Barantorto ause
22"
20"
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Notes On Goars
Pitch linos must be plainty martadanach side our
Sorry. Geurs winch mosh muet boso
placed thot moulding draftis
opposito in director.
The latter H shall be cast on the draft side of
gars Cut tooth must be trimmed to tompbote so that basring morks
Estond oror ot loost half the length, or so that hooriast procure
15 mithin the middle third of lemoth
will og
st
Pinion SA SI
IS
.'".
07
68
Virada
10
Elave
Noias an Materiat
Where not otherwise noted, castings to do
of annoskid steel as spoofred. Shafting over Jetion to be of annowboard
carbon steel forgings
Shafting 3 dram and under may bo of cold
rolled stcol. Bolts of liver stool
Machinery Ginder
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All:
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1135
2:52
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3.97
5:13
1
Plan of Right Hand Gear Train,
Soals 17c
List of Gews
sief
NO Mark
Nano
1 Brake Cyhndora noqd.
National oraks ylinder
408x13-Wypow.cm
qururlant
4
f
Type
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22
22
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4
B
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04
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14
40.1072
7 93.504
7 31.NO
79.0512
18.992
47.276
2 12.2556
24
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Spur
Spur
Sour
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sou
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Mitre
At
10"
2:0
70
cat
66
07
GO
7“
7"
4
7.30'aut Orokorra
Ench consistings:
2 Orwho stoos:
moel 16°F.
Casting
Connoctir
Lovor
GEAR TRAIN
skoon
1
4.68 fast Bratas ada
Each consisting of
"2efake shoes
Mncol 60°C 6%
cushing
connecting to
Lever
pest
point
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
*
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
,BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
IMPROVEMENT OF MICHIGAN AVE AND PINE ST:
FROM RANDOLPH ST. TO CHICAGO AVE
72
.
FEBRUARY, IDI).
ORAWING'
88.
-NOTES ON MATCRIAL-
Where not otherwisc noted, castings to oc of Amealed Steal os
Opecifica
Bolts ? Rival steel
Shaiting robe Annealed Carbon' steel forgings
LIST OF SHARTS. PEDESTALS.COUPLINGS URCARIMOS
Wurder Mart Mame
WIMMING
DID Lengua com Luan Remarks
00501
39
1542
so
+
LIST OF OEARS
Murder met were
Pien
Relea nanerer Face Borc Type Romania
CITIRANOZU CUT
10 Leren 10 IHNED
Eovanter
4 Gul
ZO 0225500
2 GL pura 2 0649
613
10.DR3
+
Pl-Cost Iron Pedostal
SM
+
3
.
89
2022
-NOTES ON GEARS-
Pitch line must de plainly martod on cach side of Ocars. Gears
which mesh muot bc 30 placed that the moulding draft is go-
posito in direction. The letter H shall be cast on the draft side
of all Qcars
SIJ
42Qcaring
Adet
1P
17
12 Ickevelings
Ta
H
22-72
7:4
$7.94
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6
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7.100
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69"
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PS.
195111
18"
7:10
7:11"
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Pa-Cost Iron pedestal
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C2
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513
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ps
P3
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PY
A202
1000
sulla
9122
$12
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End View
-89
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189
PI
89
PI
P3
41:7
189
alid
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2:7
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National Air Compressor
Type 14, a Covindlent
Asion Displacement
L28 Curt for Min @ 90 Pressure
21€."
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7:6
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Single Hand Mir Gauge
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33"
Le
3
1.81"
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Autumn
Mica Insulting
Joint
mwing
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Mica Insulting
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type R., or Coviralent
yount
Service AB
to Operators to
-Xhite Switch & Fuses
4.Clutches, Regd
Mill friction
Clutch with Special Hub
or friction Ring or couivalent
Die of Coupling 36*
102 HP 100 RPM.
8-Motors Rega
GE, Motor, Mill Type
17.0.5.-108, or Covingtent
monts
MI
45
Loker
GE. Mill Type Coupling
5*Bore, or Covirakent
Plan
-Sarcty Kerrre
is
. 2• Air Compressor Plant Regd.
complete including Apingo ere.
gif"
ierlo
86"
49"
37
3:01
Reservoir Boiizzº
tot
City Datum I
PLAN
Elevation
MACHINERY ROOM
To Governor
Standard Drun Coct
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
Elevation
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM RANDOLPH ST. JO CHICAGO AVE.
73
1
FOORUARY, 191.).
DRAWING
1
Note: Orror should point
oney from kiver, then
trunnion is to ploce..
1
1
pipe
Top.
10
Bore
D
PESA
-
-
1. Tap
asi
1
Loose Short Filler made witt
Rgroove for loassage of grase.
Krács Top Bolts.
213
Pipe
Top
5:
199
2-5 lagering
14 ist
so
2-5" Beering
Detail of Collar
_Scale I Food
Mokrioli Cost ftes
243
}
j'Eye Bolt
Bore
Filler Key 63103
at this dod
Tapered dinle
1
i short pipe
I Turner
2-os
Tured.
.
31
Nipple & Cap
ga
Ha
3-3°
-
Oil Grooves i
ior
二二二
​key bizi
Bore
.
of moll. end
Tapered lin12
8 Bore)
W
1
s'ó'c. to C. Bearizes
1
19'Red
-Nut Lock
frist Look
86
DETAIL OF BOXES FOR TRUNNONS FOR OUTSIDE TRUSSES
Scale 3 -/-Foot
Make 8 Boxes TOUS.
Material Cast Steel
1A
Bore
Note: For Detail of Ol Grooves and
Plugs see shoot 18.
26 Borded. Ternod
ALA
NI
Phos
}
Bronze Sleeve
Best Antifriction Quality
26'Bored and
Tumed
fai
24' Bore
DETAIL OF, TRUNNIONS FOR OUTSIDE TRUSSES
Scale -/-Foot
Marre 4 Thus.
3:10
175
Jy'
ut
Ź
no
Bronze Liner
35
;4- 77
24 gred
1.
Tsgubre
12 Riding
! Hadd
rit.
oss. Heed)
1
61
. 8o8
3-2
F
AE
. اما
roleſ
X х
Х
3-10'
32
TE
12
1:72
33
-Nut Lock
SECTION XX
video
na"
- gheet Lead
TRUNNION AND MAIN JOURNAL
OUTSIDE TRUSS
bř
Shery
6
77'
· BOARD OP LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
zijo
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM RANDOLPH 8T. TO CHICADO AYE
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND BARBOR
74.
FOOVUARY, 1913.
ARAWI
}
1
cegoed for Grooss
fitted with key
L2
Aug
tunery
murarion Shaft
Nul Locks
sar
& Doill.forá pre
bil'cop front
for Grease Cup
DETAIL OF LUBRICATING GROOVE PLUG
Friller Shaft
For all Trunnion Ends except shown below
L'Ape threaded Phase
Scale 6.10
Screwed inploome I
Pipe plus forall Trunlab Ends
ity
Endres shown below..
Scale sito
Note: Arrow should
point away from.
River, when
tunnion is in
place.
"Рpe Тар
pol
Turned
©!
more words
اد
ar
тар
g Drill
-Loose 'Shott er mode wit
groove for possage of goose
I
Pipe Top
Af Drill-
1-g1 Bearing
750
he!
54101
ist beering 11
Hindi
fio
2-24
stoł
4'0'c.to C. Bearings
Filler şey oireit at ipin end
Kay o'stir'at thin end Tapered
d'in 12'
112 Clar
N
Eye Bolt
$?
Short papel
Nipple & cap
33
"البوار
Bylo
33'
i
rérzi astep
Scrows
oil Grooves
See Full Size
detail below,
A
UN
2
izi
0;
Nur Lock
Drill
TA
19' Red
8 Thus
DETAIL OF TRUNNION BOXES AT CENTER- TRUSSES
8
Scale 3'-/-Foot
Mare 8
Material Cast Steel.
Rad.
Ahosphor Bronze
best entifriction quality
Sleeve beot
DETAIL OF TRUNNION FOR CENTER TRUSSES
Scale 14.1 Foot
Make 4 Trunnions Thus.
26 Bored and Turnat.
24 Bored
Bronze Liner
Borod
1
Bore
17 Rad
ise. Head
-Neod.
Square Hedd
3'
Dora teikd
Key
2c Dia.
DETAIL OF OIL GROOVE
158
„R6,
3-osa
3-08
JE
DETAIL OF COLLARS
2-c:5 708, Screws
Z dia xj laza
Scale 1/-Foot
23
Material Cost Steel
40
DETAIL OF LUBRICATING GROOVE PLUG
I For Center ends of inside touss trunwortwy.
Scale Full Size.
70
1.83
32
Nur Lock
Nut Loch
n
7*"
ligd
cord d'11"
प
TRUNNION AND MAIN JOURNAL
INSIDE TRUSS
st
5-
st?
Spear
Sheey Lead
A
1
Ark
!
DETAIL OF PLUG AF CENTER OF TRUNNIÓN
For Center ends of inside truss trunnion only.
Scale: 3/10
BOARD OP LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
IMPROVEMENT OF MICHIGAN AVE AND PINE 8T.
FROM RANDOLPH ST, TO CHICAGO AVE
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
FIORUL
1.
2.
DRAWING 75
1
AR
Opening
N.
08
CA
c steel sirot
Rodius 6-0
1
Warm Wha
C Stop Stor
1
c steel Strumi
Guidnos socials
10'Excentric li' Face See Detail Drawing
19,7
3 Goor Wheels li Pilch
29. Treth 1487 RD,
5
Hindley Worm Gear R.H.
i Ditch: eoduction 625
Wheel 75 Teelh23.87 PD.
Foxo.
*** Foce.
+
11
因​这
​3 geors
Motor HR 2 Rad
500 Voltar
Boers goerad 18
lag RPM of Screw
Short
I
For Detail of come
Soe Drowing 77
For Detail or c Shoel struts
and Links ok, see Drawing
Como
VAMP yor
wirn Slee
on
Khme
123
posit 10%
26'
of
2'er
boug
?Wi
2lah
Datum Lino 2
2
107
,9;/
Flange Coupling
3 shaft2
Com
12'
Gre
como
26 short a
Shanty
ല'://va
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/
I
81
.
13.4OZ
226
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3'0'
30°
2:10
shad
داه
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23/
}
1
1
1
HEEL LOCK
1
.
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
CITY OF CHICAGO
DEPARTMEXT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISIOX OF BRIDGES AND MARIBOR
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST
FROM RANDOLPH ST. TO CHICAGO AVE.
76
MEORUARY, 1913.
ORAWING
6
:
Ah
--
:
247*
2-S
2640
17"
POSSES:
.
1
Rod
12
1
lead
25460
387222
paoga
6122
o Dia
168 Die
186 B.&T
20ĽA-C
214 BET
to
.
LG
deft
TO
54/08 poun 28-?
Keynot
storil
Koir
LaL
SA
18936
4*
Key woyo
sh
TZ
%"
.7278
672
ST
Drill Room
8 Cams Forged Sleel
Fin allover,
stiled
PO of penter's
KA
I
1
47RD.
of cod.
odos.
1
8 Cams Cast Sleel
Finallover.
Ito Drill & Reom
HINDLEY WORM GEAR
757. i 23.873 PO.
2-Regd.
Hub & Arms to be CS. Rim to be Dnasphor-
-Bronze & shruns ón.
Iz
HINDLEY WORM Forged Steel
1.Leod, "Pitch Dio.
2-Regid.
11.636'Red couts).
7.936 Athloed
.
27"
1.336 sedel foot
Eye Bolt
TRW
HER
A'R
i
R
'Thread
2-Hoods.C./
201
eseny
41
93
612
''اک
14.3 cops:C-s
L'x7 Bolls.
L.
Pipe Top
for comp Greose cup
4 horas
Ferrock washer.
Spol roce
1267 Dia
NER
$
#x2' Topbolls
6.no
FIR
NI
¿A
8.413 Bolts
HAMM!
I
i 2. Side Corend co
13.936
ZETOA
A 2 Cosing's C.S
1936*
W. SJ6"
NER
mu
mi pri
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#Top
JU
Fristop Body
HIFI
25
HA
tis
dis
HA
10R
Split Bush PHEZ Idris
Fin oll over
VaR
LAT
AR
Pipa Plus
Ishimas
Split Dust PH-B2
Fin olliorer
Spotfpce,
the Top Bolls
101
2 Botom Cover C-S
omania
Parill
ஆகா
lá Drill
اول
s Bolls
*Shima
Aure
'Shims
72
2'24"
249"
keso
243"
V zock washer Izzul 4*
412
AL 1.26
18.
HEEL LOCK
.CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OP ENGINEERING
DIVISION OF BRIDGPS AND HARBOR
BOARD OF LOCAL IMPROVEMENTS
CHICAGO ILLINOS
IMPROVEMENT OF MIOHIGAN AVE AND PINE SIT,
FAOH BANDOLPH ST. TO CHICAGO AVE
J
MIORUMY, 191
DRAWING 77
A
1
1
Ol Grooves 2: Deep
Hey 1
E
41
tel
for outside Anchor Posts
3:6*
31
36
77
SAT
I for Inside Anchor Posts
336"
44
IU
38
6" 1.32
INN
1
Cut 6:15 Slot in
Wed for fcmonal
or Smart
Babbitt
16
eriney way
8
Ph Bronze
Busping
- snim;
lata
40
33
BE
Anse of pillow Blocks 2
9.
izt"
Grcase
Cup
brease
Choo
fiz1212,
forged and Turned Eccentric Shaft
Make 4 as shown for Outside Posts
Make 4
Inside Posts
Scale 1/9
More
1
is"
Drill is for i Bolts
Cotter
Helena
Drill 1h for 16 Bolts
Pillow Block for Excentri
Male 6 (Cast Steel)
Scale 3.10
Sep
Pillow Bloch for Excentac Shaft
Mahre 8 Cast Steel)
Scale 3'-/0
idia Bolts
156"
Note: Shim under Alloy
Blochry to consist o
2 Shin : Thích
• 2 f
- Hole
for 17 Pin.
26
Proride Snim
tor Adjustment
25
斗
​(cotter
15 Hole
. for Ipin
ابره
Links fiese can Strut
Mane
şcale T.709
1
2 1.7
4:61
to c of Pins
HA
HA
S#
Drill' It's Holes
for / Bolts
LEIKA
#shim
6:0* Radius
5*
Š"
hitti
H
LAR
Qey
she roller, A2-B3
&
Loare on Pin
LE
of
Drill Motor Bolt
Lillow Block for 26 Shaftings
Mahre 76 Cast Steel)
Scalo 3'1-O"
Cotter
San Grease Cup
2.5"
Cotter
Porc
-zte Hole
Bore
Cast Steel Shoe for Cam Strut
Mahe 8
Scale 11"-70"
HEEL LOCK
!
*****
Pn. Brorge Bushing
Cast Steçl Strut for Eccentric
Mate 8
Scalo 167.0"
Cast Steel Can Strut
Make 8
Scalo i/o
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
S
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST
FROM RANDOLPH ST. TO CHICAGO AVE
78
FEBRUARY, 1913.
DRAWING
*
t
I
I
Koymaydidi oʻrolin Keywoytidios' skeyway tikron '
He may distrert
A
ھر .نه الوايلي_1#
key lat
نجالی
stat
toy til
34104"
Is
for Grose Cup
STEEL SHAFT
Mare 4
.
म
41
cheywoy
bitioasa
1
Helmey Hidious
ŞHeyway t'dhoes
1 21
21'lla
alla
sind
s'
arut
tuk
یاد
NS
13.046
istak
-Goars alike
13 846"
2460-a.
14.2160
113.816 P-D
Helena St.
.
1384628
STEEL SHAFT
Mare 4
(Scale For Shafts rel Foot)
I
Make & Pillow Blocks.
Cast Steel
theyways daten
Keçmayditions
Keyway
2°
Zak
3 Gear Wheels té Pitch, 29 Teeth
13.846Pitch Diam. 45Face
SPUR GEAR TRAIN (cast Steel Cut Gears)
Mare 8 Sets
(Scale 3'=/ Foot)
slne ist'
a's'
STEEL SHAFT
Marse 4
4
STEEL SHAFT
Mare 2
اور می
3-10%
بلنا
STEEL SHAFT
Marse 4
IA
N
s turned Bolts
st
foru kr.
-Key
$
118
o.
Cell
34.
1
€
HH
VI
NI
I
re
:59
2
21 !/4
21 31
2:08
More 20 Cast Iron Blocks
45
91
919
-T
al
iftbar
.
3
3f
ht
El 17-18
DI
I
(
N
3² 13
1
CAST STEEL CAR COUPLING
Marie 8
(scale 3'-/ Foot)
_IL
13?
***
?
20-3 Pillow-Blocks, cis.
HEEL LOCK
18.,
01:1
Moke' 8 Castings
4 Right and 4 left
Material Cast Steel
ikzist
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE.
79
FEBRUARY, 1913
...Eltozat
ORAWING
1..
zi
se.
si
Yo!
60-0-0
LE
3:00
270 ctes ICUSSCE.
97
2
of endea
2:51
2.5"
2'41"
2:41
2:8
2:8*
2:73 "
6:08
23"
,0:0
Floor Line
floor Line
Floor Linde
Sellers
Sulle.
Baobilt
Sellers
1
Coupling
Coupling
JTA
3 'Smart
Coupling
Upll Bearing
Babbitt!
Cut slot in Plata por
Crant it necessary
ha
Bracket
Cut slot in plate for
End Floor Beam
肖
​Crank if necessary
3:
-**3cd Screw with Loch Nut
1.22LRA
Bobbilir
151
Nedge Berd 1:1
Total thickness
trims
Vertical section EF
Note: All castings to be Cast Steel
All Bolts to bc #drometer Lunched
19 dring it
Al holes cromed
action A.A
-& Bolls
2:02:
1
Gusset
int
771:2
LES of poor Beam
View of Split Bearing
tuodis
2 PL 20**
A
JURE
Cup
N
Bore
22
28
27
I Gusser
7;7
TABLE OF GCAR WHEELS
Ne Nane Mart Ni Teeth CP PD face
2 Spur LG_15 15
7 22
2
G16 84
126.74_2
2
G17 13
7:16
Gia
60 A 128:65
2
G.ro
2
G 20 so
31.03
Ole
sr Den
33
bo*
172
N
2
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3*
336*
4563
View B-B
ਕਰਨ
B
Molor She 300 volto
80C4 Geared to BSORPM,
to Get
aoping jag
.0.2
Gusset
zAn with Hex Hut
and Spring Cotter
du disits
2 A 2007
Secron Coc.
2010
-os
GIS
Morement
of Plunger
HHI
an
CENTER
LOCK
IST
Gussot
GIT
GIL
2015-93
floor line between Trusses
Tzit Bar
Elaration QQ
^3:11 "Ber
Bracket
Section EE
2 Pin with Her Net
and Spring Comer
2P with Hex Nut
and Spring Conter
GIO.
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND BARBOR
7
Nolc, Saction not shown here simiker
to Sachion shown Lor muide Low
Changc castings, LO Corcospend to
dellom Cherd of Outside tous ses
shown here
Izpin. Her Nut
and Spring Cotter
ta
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
Fit
G20-
Gio.
Jill Bora
TE
Selece. Eli sport
Coupling
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM RANDOLPH ST. TO CHICACO AYE
80
last
FLORUARY, IDIA.
DRAWING
13141-11
Shop
Bracket
)
Plan
او
10.0
HO
1
ta
ము,
orazione
Jakie
AL
• Elek +1875
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Chicago Petun.
Chiese Daten
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copiers
True
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In Arshor com
شمار
va
ALO
All
LA
1
464all
CROSS SECTION OF PIT & ELEVATION OF ANCHOR PIER
For Broms st. 40°. 8.0°g.
Continue to porotors
Foot Broms 360.50b.
2-sty Term Saporotors.
* Doors. 209.65.ro
Coot Iron Suporotori
6- Dolly to
14875
1
exal
LONGITUDINAL SECTION OF PIT.
Sollent
Anchor Pler
2
Rier Pier
.
-
Es
Artal
sece
Les
وید
1
FC
7676
2:16
Fit
Sor.gure sorryg Trung
r. Tava.
مملو
S of Qurado Corrying Truto
Sumo
LONDON
bol.com
che Bradbud Mda saocryIch
1
Sumo
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16 a lacc Loaf Trusa
of Inner Labr Tror
Mochnery Gordor
for Outer Leor Tros
LO"
de Coronel
5
po
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MA
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1
Half Grans Section of Pite Raar Elav. of Plor,
disetom secta
Time!
por en
do 143
Holl Front Elevation of Pier
RIVER PIER
NU
MAIN PIERS
2
1
151. Boom 2.100". 1960'kg,
Wicoot hory Soporotora
PLAN
BOARD OP LOCAL IMPROVEMENTS
CAICAGO, ILLINOIA
fuis Ocomo.81*0008 *"09
Cort Iron Soporotory
8. Dolto
L
for boome 20.00
x. Cont Tros, Soporotors.
[a- Baltat
CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM RANDOLPH 8T. TO CHICAGO AVE
DRAWMS · 81
!
FCBRUARY, 1913.
1
imeo
Koce
9.777
Albars en
"borni
arborg he
of borsas
Docker
16-44 *bary at
dock hoc
Boc
woll" tot
7/bars ha
16%
20
CROSS SECTION OF PER ELEVATION OF ANCHOR PIER.
reglabás troll
pond wory ng from 1-67.
--54,4 forsgruou baimes •856-40
Saher must tap to
n-f"Bars -ison
spoond my vo' than 01.3to.
noord try notrror choo
sodbory srot Betnom El-854
oplice muor lopron
LONGITUDINAL.SECTION OF PIT.
..o
nytt
.
3
6-thbors at a
Dock Foca
"Boch loce.
stod bore sa
e-bere al
R:Liber bo
Pion of Transverse Bors, Toa
pion or longitudinal Bors, Top
9-16"barees
*Cleaks
HT
bed bredhead
Abozba
our bra de
Plan of Trongverse Bors, Bottom
911'bory ci
Brement
Plon of Longitudna Bors, Bottom
shid borede
To Tap
cock na
Roca
RIVER PIER.
on bors a.
Frant face
say ar
Front face
MAIN PIERS
REINFORCING BARS
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
PLAN.
-
Lloret
3750g,Ji
odberce
. 30.1d"beyrt.
8.13" bare
CITY OF CHICACIO
DEPARTMENT OP PUBLIC WORKS
BUREAU OP ENGINEERING
DIVISION OF BRIDGES AND HARBOR
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE
82
FCBRUARY, 1012.
DRAWING
-.ie
20
-..
Zbog, 80g, 50ʻchra, bent
hory, 8:oºk-soʻchra, bent
450 Toper Sidewalk
6/6s0 Jop of sidewyn.
1
1
_102. leadtudy 2
To je Bars
Bar
(a 350)
1 - 1330)
120)
I'dory n counter for
laors n counterport
1
1
deument Back
(SE Basement,
U
Barranco
bort
1
.3
dezephant Floor, -550
Machineck egon og
O'Bor everyone
CHKHIL_DATUM
BE
de
Bor
der eno* 1. A
Borseman 5. not.
Bars
di
fm
19 WW WW
le
-gʻbars
000 FTA
HOT RTL
Cross SECTION THOUGH MACHINERY ROOM,
2 ELEVATION OF ABUTMENT WALL.
-Srilar for both
oporcocheo
Cross SECTION OF ABUTMENT WALL
AT BASEMENT.
SECTION A-A.'
Curd boxes of Sw Asercach
CROSS SECTION OF ABUTMENT WALL
AT MACHINERY ROOM.
GECTION 3-8.
Cors
or ser
Seringer Brgy
is
fa-
Cati (35ts 2
3/'o'
och
3
31-0
3:
curb line of SE. Aproach
0--. of short
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به و
مهار دهه 4
151
NORTH
ACHINES
HINERY ROOM.
(bors vool too
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of Anchor Column
PLAZA FOUNDATIONS, ABUTMENTS
NO MACHINERY ROOMS.
tr
1
-
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
CITY OF CHICAGO
DEYARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF LRIDGES A.XD HARBOR
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE.
83
+
;
FEBRUARY 1913
DRAWING
N
1
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20-25
RIVER PIER
a
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REAR ELEVATION OF NE. APPROACH WALL.
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PLAZA FOUNDATION
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bore, not hooked.
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DOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
CITY OF CHICAGO
IMPROVEMENT OF MICHIGAN AVE, AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE.
84
FEBRUARY, 1013.
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PLAZA FOUNDATION
SOUTH EAST
BOARD OP LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
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CITY OF CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISION OF BRIDGES AND HARBOR
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST
FROM RANDOLPH ST. TO CHICADO AVE
85
FEORUARY, 1013
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FRONT ELEVATION OF S. W. APPROACH WALL.
Section warteo
SECTIONAL VIEW NEAR LINE D.D.
approach wall.
Stur bars to sake with vertical bars in
molts propor for all footinya
jose.
bos
in concrete
Datum.
Datum
4.0
aw AiDPROOCH WALL.
Abter
Too of all Stai hall Footings of Elevt 5.0.
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GENERAL SECTION NEAR LINE C-C"
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BOARD OF LOCAL IMPROVEMENTS
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RIVER PIER.
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE.
86
PEORUARY 1913
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2 bors
Datum
boy
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HIFT
ELEVATION & SECTION NEAR LINE AA."
boooway Grode
'bars
SAR.
bons
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bar
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Güftüüdio i iti
REAR ELEVATION OF NW, APPROACH WALL.
!
FEARUARY, 1012
FROM RANDOLPH ST. TO CHICAGO AVE.
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
DRAWING 87
moments
CHICAGO, ILLINOIS
BOARD OF LOCAL IMPROVEMENTS
DIVISION OF BRIDGER AND HARBOR
BUREAU OF ENGINEERING
DEPARTMENT OF PUBLIC WORKS
CITY OF CHICAGO
NORTH WEST
PLÁZA FOUNDATION
1
ne.com
, امهاته
y Erpension Joint
filled
Asphalt
Top or Roodway
for petite
Peility
Ground
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1
19.1
1
0.7.6:7
Storg Borsti
Bearing
Barour
Soma -
+
- Hory Borsj
Vanovic
Kranabi
con faision
uders.
INDEX OF DRAWINGS
any
ITEM
umy
ITEM
NA
Ganerul FonkregenStelle
6. rloor.UASC Arda
INSCCThor trollamme. Curn dowry, Monnces 971 novela Art Floor Qual..
Ayon North of anio
.SIIiners Monaste. Act,
G16coccal teretion Bridge
.42 1.0rgun lagrs.
Lasncral Brutas Doutrition. SLROLL.hower last
gerol menol Ande
SI Counterheront de
Framing tao. Ancopne 2014 - 31.
- Ecoming Plon khas 2.50!h rosa
2. Lalo South P1020
V4.1 Curtain on Ourant's Trussas.
10 Siel Electensr.sk
**_fino_cart....
CITloor North Piana
Den Freming PUAN. NO!! POLO /
37. Outsider. Carrying. Toussa
122 caining Planno19 000
Inside..
41. Mor Stabs.
32. Machinery Order
15.1 Staircasa or Streor Crossinys.
40. Crus Trones Acheer Mode ander Acad.lous.
14_1 Enoring Section, Street Crossing
". Corrying birdsru.
17. noutman holl. Sou ICOS! 27/019.
Outside Anchor..Columns.
10. noxushl_Wolle South West Voco
Os Insids."
19.US.CU Wull, North.cost pion
Mlinary Island..
20.1 Tournant walmarin.201...
lour Watcm, hincd.Art
2 bytent_wa!...Ostali
22. General River Zerulia) oYowca
67
23.1. Will Sesjonsol Norse.
20
4. Textmart holls rusose.. Datoils..
*5 Prouge mous_loor Plung
Mutuminery. Man
Occhion through row or
General Eleracion..lMechencry..
2213 outh pioia Elon'ution's
(20 Jan.
201 South Plucu, loner R00.J wuje
. Mol. Liachinery Room
2 l vorin Pia:e lovorionjo.
leunions Moin. Jourdal. Outside. Trus..
Norin F10:0, 20x cr Acou woy
Ioana
Outside_Jr.vss.
Hrelirez
10' (* cine
bors
Portor
Faurs
TYPE I.
coundredi
10:0wird
TYPE II.
A
Yarrarle
Yong!
Batterlin 37
Groups
.
Les Plantacon & Approach
to
Variable
Yarizala
546!!
of Calma
30. Drain Pipe orary 30:0
Jumpsjon
-J' Diu Drum Pipa Cvery Joo"
Bors
COLS
dia wire round yourally
around column abou! qur
held in plocchy verricol roo's
stones to ach coil or Oyual
*22-1: Bors
771 Bars
SE ROSIN
*&rstede
34.
36claside.
Hory Bar
Bars 13ctral
Noto 1111 columns covered
by reinforced concrete
in a similar manner
- Bersijölrs
32
Hors Bors
9o.
Main fiers.
Reinforcing dans...
ns. Pioza Foundations, but mients.
Over Flopa. Foundation Porta bost
PION Forvalion South West
17
Foundation. North Wear
08 Indra Orvaus slowme. Secina crpalmer
Plectric Lighting x mong
9
Counter rogut Boy
Zlar.System Moradic Art
Faja
Lido
vio"
1's big"
!_C.
las
co
trud floor Beam Maradt Here
10:0
Loucada Datuma
6.
*Sidewalk
Noto: Jdio Orrin Pipes crory
Joo
in all Walls. Each Drain protected
by about cuyd of course Granol
os shown for Typo DV
Row
borringe
Scale ito!'.
Tarout
6
Typical Expansion Joint
at Roadway Floor.
Scato 11
I
with Rsphaltie Filler
)
1
feitaria
OVO
21.daris
1
* non. Hars
het
esaten
TOR Sudajualk
Medusa
Ocoring py
corside
Asphalt
TYPE III.
concreto
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Yarulla
Varioble
Bars Kicts. 9.07€
Eater I in 32
TYPE N.
2de 18 of course Green
of Colima
Hory Borst
creriepla
Warumble
Lot Column
Spis Droin Apc query Jo'o"
INDEX OF DRAWINGS
RETAINING WALL SECTIONS
EXPANSION JOINTS
1
fiburs scris
gais ordin Pipe every 30:0"
2.6"
groblers rocnrs.
+
6:9"..
.'8
20.
Man Curb Llamadas.Omdar
die
Huraca.fuck Elers orcr.l./fl.-
Typical Expansion Joint
at Sidewalks.
Soala , 1 .
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
OF
H.Yarisdie...
Leia"
CITY ON CHICAGO
DEPARTMENT OF PUBLIC WORKS
BUREAU OF ENGINEERING
DIVISIOY OF BRIDGES AND BARBOR
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE
88
Chicage Datums
PKORUARY 1913.
ORAWINC
J
.
1
LAKE ST
SOUTH WATER ST.
1
L
8
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Condir
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Conduit
at
ga
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क T
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ze
stres
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fer conduit
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whole-hole
VT OUTCOINCT
rusta
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---- Conduce
لع
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a t conduite
be
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8
Condunt
Este
conduir o
Oche
conduct
16
ry-
Ýs condolo
O-
ay
O--
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8
1
1
ALLEY
1
1
LIGHTING OF LOWER LEVEL
1
L
iz
TI
+
{1
1
INDICATES. Pipe CONQUIT, DIAM IN INCHES
INCANDESCENT LIGHT WITH HORIZONTAL REFLECTOR
ANGLE
10.12 che
Size or WIRES, BROWN SHARPE GAGE
INCANDESCENT FIXTURE OM UPPER LEVEL
BOARD OF 1OCAI1.MPROVEMENTS
CHIC.IGO, 11.1.1.XOIS
WIRING OF LOWER LEVEL
*8
.
0 4 8 12 16
40
72
o
SCALE. 1. 16'
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST
FROM RANDOLPH ST TO CHICAGO AVE.
FCORUARY 1913
89
1
ORAWING
$
SOUTH WATER ST
ALLEY
ta
SOUTH LINE OF SOUTH PLAZA
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8
1
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LICHTING OF LOWER LÈVEL
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1
J
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12
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Com
•* 2
WIRING OF LOWER LEVEL
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
INDICATES PIPE CONDUIT, DIAM. IN INCHES
INCANDESCENT LIGHT WITH HORIZONTAL REFLECTOR
ANGLE
*8,"10,* 12 el
SIZE OF WIRES, BROWN # SHARPE GAGE
INCANDESCENT FIXTURE OM UPPER LEVEL
*04 8 IL 10
2
40
36
64
72
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE
FEBRUARY, 1913
DRAWING 90
SCALE 1.16
1
t
.
De
1
14
CONDUIT.
CONDUIT
+14
CONDUIT
RIVER ST.
set
E
5
Uunonoscu
14.
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HE
" CONDUIT
DO_2
H
00
8
DO
O
CONDUIT
o
CONDUIT
12
& CONDUIT
1.
1
O
CONDUIT
Batu
-10
Ź
CONDUIT
PUMP MOTOR
CONDUIT
14
1.แnoN02
TRUNNIONS
-ra
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CONDUIT
MICHIGAN AVE.
tul
De
26
BRIDGE
Dod
in
- 12
1
ist
CONDUIT
CONDUIT
TE - SOUTH
PUMP MOTOR
C
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she
Se
CONDUIT
le
th
olen
4 있
​1
Estany
CONOVI
q
ka
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edge
ME
8
at 어
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8
Em
INDICATES PIPE CONDUIT, DIAM. IN INCHES
0
INCANDESCENT LIGHT WITH HORIZONTAL
RCFLCCTOR
ANGLE
*8*12 etc Size of WIRES, BROWN & SHARPE GAGE
CONDUIT
be
LIGHTING PLAN
WIRING PLAN
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
LOWER LEVEL
SOUTH PLAZA
6 12 18
34
32
48
36 64
72
BO
SCALE: 1.16'
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE.
DRAWING 91.
FEBRUARY, 1912.
!
1
+
.
E CONDUIT
11
Toomas
CONDUIT
HIIHIIII
HIIHEITH
Lock Motors
---
1
7
1
ar TRUNNION
lor Trenino
iu
LIGHTING OF LOWER DECK
OF
BRIDGE
1
I
Om TAUNNIONS
t
& om TRUNNIONS
lu
ini
12
1.
.#R
1
con
.
FR2
12
lll
WIRING OF LOWER DECK
RIBG
BRIDGE
1
*
INDICATES PIPE CONDUIT , DIAM IN INCHES
INCANDESCENT LIGHT WITH HORIZONTAL REFLECTOR
ANGLE
8 "10,*iz ele:: Size or WIRES, BROWN * SHARPE GAGE
은
​BOARD OF LOCAL' IMPROVEMENTS
CHICAGO, ILLINOIS
* ORIG
24 32
10
22
8
IMPROVEMÉNT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE.
.
A
SCALE:1.16*
.
FEORUARY, 1913,
DRAWING 92
1
1
:
1
+
I
4
1
1
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l.
I.
no
DO
&
1
Od
CONOUIT
0000
PUMP, MOTOR
0000
AIR Comp
MOTOR
23 "CONDUITS
12
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MOTORS
!
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rom WIRING OF PUMP MOTORS
SEE SHEETS N 91 k94
Pumr. MOTOR
WIRING FOR NORTH MOTORS TO BE IDENTICAL
1
1
A
WIRING OF MOTORS IN MACHINERY
ROOMS
5
bal
more
1
ol
C
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1
!
A
LIGHTING AND WIRING or
NORTH MACHINERY ROOM ANO BASEMENT
+
LICHTING AND WIRING OF
SOUTH MACHINERY ROOM AND BASEMENT
..
INDICATES PIPE CONDUIT DIAM IN INCHES
O
INCANDESCENT LIGHT WITH HORIZONTAL REFLECTOR
2000, "iz Size or WIRES, BROWN * SMARPE GAQE
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
O4 8 12 16
24
40
is
IMPROVEMENT OF MICHIGAN AVE AND PINE ST.
FROM AANDOLPH 8T. TO CHICAGO AVE
93
36
64
72
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1
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0
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3
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10
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---------
CONDUIT
LIMONO
00
8
8
8
70
1
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CONDUIT
57
لم
5
ob
1
A covourt
4
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76 Conouit 3
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14
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1
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CONDUIT
t-o
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14
LIGHTING PLAN
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INDICATES PIPE CONDUJT, DIAM IN INCHES
INCANDESCENT LIGHT WITH HORIZONTAL REFLECTOR
O
ANGLE
}
*8*10,"12 etc
SIZE OF WIRES, BROWN 5 SHARPE GAGE
INCANDESCENT FIXTURE ON PER LEVEL
LOWER LEVEL NORTH PLAZA
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILLINOIS
8 12 IG
40 48
56; 64
72
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST..
FROM RANDOLPH ST. TO CHICAGO AVE
SCALE:1-16)
PEBRUARY, 1013.
DRAWING 94
>
MICHIGAN ST,
ALLEY
ILLINOIS ST
ALLEY
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8
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WIRING OF LOWER LEVEL
BOARD OF LOCAL IMPROVEMENTS
CHICAGO, ILIINOIS
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A
8 12 16
32
40
48
56
72
80
IMPROVEMENT OF MICHIGAN AVE. AND PINE ST.
FROM RANDOLPH ST. TO CHICAGO AVE
95
SCALE
INDICATES PPE CONDUIT, DIAM IN INCHES
INCANDESCENT LIGHT WITH HORIZONTAL REFLECTOR
ANGLE
*8*10*12 etc SIZE OF WIRES, BROWN & SHARPE GAGE
INCANDESCENT FIXTURE ON UPPER LEVEL
►
1.16
ORAWING
FEORUARY. 1913
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1
53
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1
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o
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The estimate of the cost of the said improvement, including labor and
material, is as follows:
Section “A”-Superstructure of Bascule Bridge.
Structural steel, 6,150,000 lbs., @ $.05..
$307,500.00
Forged steel, 92,000 lbs., @ $.08.
7,360.00
Steel castings, 150,000 lbs., @ $.08..
12,000.00
Cast iron bolsters, 120,000 lbs., @ $.03..
3,600.00
Counterweight-
Concrete, 1,100 cu. yd., @ $8.00....
8,800.00
Pig iron and punchings, 700 tons, @ $30.00.
21,000.00
Cast iron blocks, 500 tons, @ $40.00..
20,000.00
Creosoted timber, 113,000 ft., @ $80.00 per M.
9,040.00
Creosoted paving blocks, 1,680 sq. yd., @ $4.00...
6,720.00
Asphalt pavement, 1,940 sq. yd., @ $5.00..
9,700.00
Hand railing, upper deck, 540 lin. ft., @ $6.00.
3,240.00
Hand railing, lower deck, 440 lin. ft., @ $3.00.
1,320.00
Wire fabric for asphalt pavement, 17,500 sq. ft., @ $.10.
1,750.00
Total .
... $412,030.00
Section “B”-Machinery for Bascule Bridge.
Cast steel racks, 84,000 lbs., @ $.10...
...$ 8,400.00
Cast steel gearing, 280,000 lbs., @ $.12.
33,600.00
Rolled steel (shafts, etc), 150,000 lbs., @ $.10.
15,000.00
Machinery cast iron, 25,000 lbs., @ $.06..
1,500.00
Couplings and clutches,
2,000.00
Bronze bushings, 9,000 lbs., @ $.50.
4,500.00
Babbitt metal, 2,300 lbs., @ $.40...
920.00
100 h. p. operating motors, 4, @ $2,000.00.
8,000.00
10 h. p. electric motors, 4, @ $300.00...
1,200.00
772 h. p. electric motors, 2, @ $250.00.
500.00
5 h. p. electric motors, 4, @ $200.00.
800.00
Centrifugal pumps complete, 4, @ $300.00...
1,200.00
Air compressors complete, 2, @ $550.00.
1,100.00
Hand brakes complete, 4, @ $25.00.
100.00
Air brakes complete, 4, @ $75.00...
300.00
Switchboards
2,000.00
Controllers, interlocking devices, signals and wire connections
between motors and controllers.
2,500.00
Safety gates
1,000.00
Total ..
$84,620.00
Section “C”-Substructure of Bascule Bridge, Including the Foundation of
Abutment Walls and Bridge Houses, the Machinery Room,
Basement and Dock Walls.
Construction and removal of necessary coffer-dams. ...$ 60,000.00
Dredging excavation, 10,000 cu. yd., @ $.40.
4,000.00
Excavation (dry), 15,100 cu. yd., @ $1.20..
18,120.00
Wooden piles, 1,950, @ $18.00..
35,100.00
Concrete-Class "A," 13,400 cu.'yd., @ $8.00..
107,200.00
Portland cement mortar for waterproofing pits, 750 cu. yd.,
@ $20.00
15,000.00
Steel for reinforcing concrete, 1,240,000 lb., @ $.04.
49,600.00
Anchor rods, 115,000 lb., @ $.04..
4,600.00
Concrete floors (including docks), 25,200 sq. ft., @ $.20..
5,040.00
$298,660.00
54
.
Section “D”_Estimate of Bridge Houses.
One Bridge House.
Granite, 650 cu. ft. @ $4.50 ..
..$ 2,925.00
Bedford stone, 3,108 cu. ft. @ $2.00.
6,216.00
Concrete-reinforced, 62 cu. yd. @ $20.00...
1,240.00
Concrete-plain, 220 cu. yd. @ $8.00.
1,760.00
Steel reinforcing, 8,000 lbs. @ $.04..
320.00
Book tile, 620 sq. ft. @ $.10..
62.00
Four-inch hollow tile, 440 sq. ft. @ $.15.
66.00
Plain plastering, 66 sq. yd. @ $.50.
33.00
Hard plastering, 60 sq. yd. @ $.60.
36.00
Metal lathing, 90 sq. ft. @ $.10..
9.00
Circular metal frames and sash, 2 @ $30.00..
60.00
Metal frames and sash, 12 @. $30.00 .
360.00
Metal frame and window complete, size 3' 0"x6'5", 1 @ $40.00..
40.00
Metal frame and window.complete, size 5' 4"x7' 6", 1 @ $50.00.. 50.00
Metal frame and window complete, size 2' 8"x1' 4", 2 @ $25.00.
50.00
Metal door and frame complete, size 3' 8"x7' 2", 1 @ $60.00.. 60.00
Metal door and frame complete, size 2' 10"x7' 2", 1 @ $48.00.
48.00
Metal door and frame complete, size 2' 4"x7' 0", 1 @ $42.00... 42.00
Metal door and frame complete, size 3' 8"x7' 3", 1 @ $58.00.
58.00
Bronze door, 1 @ $122.00.
122.00
Toilet door, 1 @ $22.00..
22.00
Wash basin, 1 @ $25.00.
25.00
Water closet, 1 @ $38.00.
38.00
Urinal, 1 @ $20.00..
20.00
Plumbing connections, 118 lin. ft. @ $3.50.
413.00
Soil pipe, 30.lin. ft. @ $.60..
18.00
Vent pipe, 65 lin. ft. @ $.60.
39.00
Copper gutter, 70 lin. ft. @ $.80.,
56.00
Down spouts, 3" cast iron, 65 lin. ft. @ $.80.
52.00
Stairs, 1 set @ $1,160.00..
1,160.00
One Bridge House complete..
$15,400.00
Four Bridge Houses.
$61,600.00
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Section “E”—Abutment Walls-Masonry Stairways and Balustrades
at Plazas.
Granite masonry, 14,250 cu. ft. @ $4.50...
$64,125.00
Bedford stone masonry (including balusters and cut stone), 20,440
cu. ft. @ $2.00 ...
40,880.00
Balusters (extra labor), 880 @ $3.00...
2,640.00
Newel posts (extra labor), 4 @ $45.00.
180.00
Concrete (backing stone walls), 1,750 cu. yds. @ $8.00..
14,000.00
Iron grills, 12 @ $140.00..
1,680.00
Wood doors and frames, 11 @ $50.00...
550.00
1
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$124,055.00
Section "F"_Elevated Structure, exclusive of Bascule Bridge, and including
Steel, Concrete, Glass Sidewalk, Lights, Concrete Stair-
ways, Terra Cotta and Balústrades.
Structural steel, 9,010,000 lbs. @ $.04..
$360,400.00
Steel for reinforcing concrete, 1,125,000 lbs. @ $.04.
45,000.00
Cast iron wheel guards, 460,000 lbs. @ $.04.
18,400.00
55
0
300.00
3,300.00
2,400.00
36,000.00
222,300.00
2,700.00
.
.
Iron newel posts, 20 @ $15.00...
Iron railing (on upper level), 550 lin. ft. @ $6.00.
Iron pipe railing, 600 lin. ft. @ $4.00....
Concrete foundations for columns, 4,500 cu. yd. @ $8.00.
Concrete enclosing steel structure, 12350 cu yd. @ $18.00.
Concrete stairways, 90 cu. yd. @ $30.00...
Finished surface concrete walks supported on steel structure,
156,980 sq. ft. @ $.05..
Glass sidewalk lights, 38,000 sq. ft. @ $1.50...
Asphalt for expansion joints, 20 tons @ $25.00.
Terra cotta, 525 tons @ $85.00..
Terra cotta mouldings (extra work), 1,550 lin. ft. @ $.70...
Bedford stone (including balustrades), 2,310 cu. ft. @ $2.00.
Balusters (extra labor), 750 @ $3.00...
.
7,849.00
57,000.00
500.00
44,625.00
1,085.00
4,620.00
2,250.00
$808,729.00
Section "G"-Retaining Walls (except those at river), Curbing, Sidewalks
and Supporting Walls and Columns, Concrete Foundation for
Pavement, including Concrete Pavement, Excavation and
Filling (except that at river).
.
Concrete, Class "A", in walls and columns, 9,600 cu. yds., @
$8.00 .
$ 76,800.00
Concrete, Class “A”, foundation for pavement, 53,660 sq. yd., @
$1.50.
80,490.00
Concrete pavement, 3,125 sq. yd., @ $2.00..
6,250.00
Concrete curbing, 7,600 lin. ft., @ $.50...
3,800.00
Concrete sidewalk, including cinders, 80,500 sq. ft., @ $.15.... 12,075.00
Concrete slab sidewalk, lower level, 32,310 sq. ft., @ $.50.. 16,155.00
Steel for reinforcing concrete, 500,000 lbs., @ $.04.
20,000.00
Excavation, 66,000 cu. yd., @ $.50...
33,000.00
Filling (common), 23,000 cu. yd., @ $.50.
11,500.00
Filling (soil for parkways), 1,650 cu. yd., @ $2.00...
3,300.00
Removal of surplus excavation, including wreckage of build-
ings, 43,000 cu. yd., @ $1.00...
43,000.00
Removal of buildings
1,000.00
.
$307,370.00
Section “H”—Pavements (exclusive of concrete foundation), Adjustment of
Sewer Manholes and Catchbasins.,
Asphaltic pavement, 44,000 sq. yd., @ $1.50..
.$ 66,000.00
Granite block pavement, 27,000 sq. yd., @ $3.00.
81,000.00
New catchbasins, complete, 88, @ $50.00..
4,400.00
Cast iron inlets and downspouts, complete, 27, @ $30.00.
810.00
Adjustment of manholes..
200.00
Rebuilding of 4-ft. sewer, 170 lin. ft., @ $8.00.
1,360.00
Rebuilding 12-inch tile pipe sewer, 130 lin. ft., @ $2.00.
260.00
$154,030.00
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C
Section "I"-Electric Lighting System.
Electric light fixtures (Michigan Av. type), 36, @ $150.00......$ 5,400.00
Electric light fixtures (Safety Islands), 2, @ $75.00..
150.00
Electric light fixtures (Lincoln Parkway), 57, @ $100.00.
5,700.00
Electric light fixtures-Type I, 10, @ $300.00.
3,000.00
-Type II, 32, @ $250.00.
8,000.00
-Type III, 4, @ $850.00.
3,400.00
-Type IV, 6, @ $400.00..
2,400.00
Incandescent fixtures, including sockets, reflectors and outlet
boxes, 728, @ $5.00..
3,640.00
Iron conduits in place, 13,300 lin. ft., 12" diam., @ $.30.
3,990.00
400 lin. ft., 94" diam., @ $.35.
140.00
2,200 lin. ft., 1 diam., @ $.40...
880.00
600 lin. ft., 114" diam., @ $.45.
270.00
3,600 lin. ft., 142" diam., @ $.50.
1,800.00
1,000 lin. ft., 2 diam., @ $.60.
600.00
3,200 lin. ft., 274" diam., @ $.80.
2,560.00
Fibre conduits, complete, 1,800 lin. ft., @ $.80...
1,440.00
Insulated copper wire in place-
No. 14 B & S gauge, 31,000 lin. ft., @ $.02.
620.00
No. 12 B & S gauge, 13,800 lin. ft., @ $.025
345.00
No. 10 B & S gauge,
gauge, 9,400 lin. ft., @ $.03...
282.00
No. 8 B & S gauge, 2,000 lin. ft., @ $.04.
80.00
No. 6 B & S gauge, 8,800 lin. ft., @. $.05.
440.00
No. 4 B & S gauge, 1,800 lin. ft., @ $.07...
126.00
No. 6 B & S gauge (lead covered), 4,800 lin. ft., @ $.30. 1,440.00
Conduit junctions, 130, @ $3.00...
390.00
Cut-out cabinets, 6, @ $10.00.
60.00
1
$47,153.00
SUMMARY OF ESTIMATE.
.
Section "A"-Superstructure of Bridge..
Section “B”—Machinery for Bridge..
Section “C”-Substructure
Section “D”—Bridges Houses
Section "E”Abutment Walls
Section "F"-Elevated Structure
Section "G"_Walls and Excavations
Section "H"_Pavements
Section “I”—Lighting
$ 412,030.00
84,620.00
298,660.00
61,600.00
124,055.00
808,729.00
307,370.00
154,030.00
47,153.00
Total (not including land to be taken)..
$2,298,247.00
And I hereby certity that in my opinion the above estimate does not
exceed the probable cost of the above proposed improvement.
(Signed)
C. D. HILL,
Engineer of the Board of Local Improvements.
Dated, Chicago May 1, A. D. 1913.
(Signed)
EDWARD J. GLACKIN, Secretary,
Room, 207, City Hall.
57
SECTION 2. That the recommendation of the Board of Local Improve-
ments of the City of Chicago providing for said improvement, together
with the estimate of the cost thereof (omitting land to be acquired) made
by the engineer of said Board, both hereto attached, be and the same are
hereby approved.
SECTION 3. That the said improvement shall be made and the just
compensation for private property to be taken or damaged therefor shall
be ascertained and the whole cost oť said improvement, including the just
compensation to be made for private property to be taken or damaged for
said improvement and the cost of said improvement (ornitting land to be
acquired) being the sum of $2,298,247, as shown by the estimate of said
engineer of said Board of Local Improvements, shall be paid for by
general taxation and by special assessment in accordance with an Act of
The General Assembly of the State of Illinois, entitled “An Act concerning
local improvements," approved June 14, A. D. 1897, and the amendments
thereto. That part of said improvement the cost of which is estimated
in Sections “A”, “B”, “C”, “D”, “E” and “I” of said estimate of said engi-
neer hereinabove referred to and hereto attached being the sum of
$1,028,118, shall be paid for by general taxation and the remainder of said
improvement the cost of which is estimated in Sections “F”, “G” and “H”
of said estimate of said engineer, being the sum of $1,270,129 and also the
land to be taken or damaged for said improvement, shall be paid for by
special assessment.
SECTION 4. That the attorney of said Board of Local Improvements
be and he is hereby, designated and directed to file a petition in the County
Court of Cook County, Illinois, in the name of the City of Chicago, pray-
ing that steps may be taken to ascertain the just compensation to be made
for private property to be taken or damaged for said improvement and
to ascertain what property will be benefitted by said improvement, and
the amount of such benefit, and also that steps may be taken to levy a
special assessment for said improvement in accordance with the provisions
of this ordinance and in the manner prescribed by law.
SECTION 5. That all ordinances or parts of ordinances conflicting
with this ordinance be and the same are hereby repealed.
SECTION 6. That this ordinance shall be in force on and after its pas-
sage.
WC 2., 1973
UNIVERSITY OF MICHIGAN
BOUND
3 9015 02123 3393
APR 11 1917
UNIV. OF MIHA
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