The Rock Island Argus and daily union. (Rock Island, Ill.) 1920-1923, 1920-04-17

In the concrete, eofQ OOitS 10 NC
placed on opposite sides of the man
hole, this part of the cover shall
be placed on top Of the man
hole and the bolts shall be put IL
place before the concrete is set.
All street pavement which shall
be necessary to remove In con-
structing said hereinbefore descrit-
ed storm sewer, shall be restored
to its present condition as nearly
as possible.
All concrete sewers shall be
composed of one part cement, one
and one-half Az parts sand and
three 81 parts gravel and shall be
reinforced transversally with hoops
of one-half (s) inch in diameter,
round steel bars of a length to
make the ends lap one "a foot and
six CO. inches, these hoops to be
placed one "a inch from the in
side surface, four "a inches on CELL
tiers and one % inch from the out
side surface of said sewers, four
"a inches on centers. The longi'
tudinal reinforcements for tying
transverse bars to consist of one
half (1k) inch in diameter rouni
steel bars spaced approximately
one % foot apart, alternately
against the inside and outside
hoops and tied to said hoops with
No. IA wire at all points of inter-
section.
All trenches provided for in this
estimate shall be backfilled and the
earth thoroughly tamped from the
bottom of said trench to the spring
line of the sewer.
The lines of the storm sewers as
herein located, are taken as the
center lines of the respective sew
ers.
The elevation of the bottom of
the open ditch hereinbefore de-
scribed at a point 249 feet north
of the north line of Eleventh Q1th}
avenue shall be 1903 feet.
The elevation of the bottom OF
the open ditch as hereinbefore de-
scribed az a point 1862 feet north OF
the north line of Eleventh Q1thl
avenue shall be 1916 feet.
With uniform grade between
said points hreinbefore fixed.
The elevation of the flow line of
the 81 inch storm sewer on Eleventh
Q1th)) avenue as herinbefore de-
scribed shall be as follows:
At point 146 feet north of the
north line of Eleventh 11th) ave-
nue. and ten t10l feet west of the
cast line of First 1st) street 1918
feet.
At point FIVE f5) feet south of
the north line of Eleventh 11th)
avenue and fourteen 90 feet west
of the extension Of the west line
of Second end street 1852 feet.
With a uniform grade between
said points hereinbefore fixed.
The elevation of the flow line OF
the so inch storm sewer on Eleventh
11th) avenue as hereinbefore de-
scribed shall be as follows:
At a point fifteen Qol feet south
of the north line of Eleventh 11th)
avenue and 49, feet east of the
west line of Seventh 9th street
1852 feet.
At a point five (5) feet south OF
the north line of Eleventh t11thj
avenue and four az feet west OF
the extension of the west line Of
Second end street 14.62 feet.
With uniform grade between
said points hereinbefore fixed.
The elevation of the flow line of
the Ninth (5th) street branch storm
sewer as hereinbefore described
shall be as follows:
At point one hundred 400 feet
north of the north line OF Fifteenth
t15th, avenue, 1888 feet.
At point 762 feet east of the
west line of Seventh t7th} street
and fifteen 15) feet south OF the
north line OF Eleventh 9th, ave-
nue.. 1882 feet.
With uniform grade between
said points as hereinbefore fixed.
The elevation of the flow line OF
the 66-inch storm sewer along Sec
ond l2nd street and Eighteenth
18thi avenue. as hereinbefore de-
scribed, shall be as follows:
At a point five tol feet south OF
the north line of Eleventh t1lth)
avenue and fourteen C14l feet west
Of the extension of the west line of
Second street. 1852 feet.
At a point 500 feet south of the
south line of Eleventh 11th) ave-
nue. and 26 feet east OF the west
line of Second end street, 1902
feet.
At a point 1928 feet easterly Of
the east line OF Second t2nd street,
said 1923 feet being measured
along the center line of said sewer
as hereinbefore described from the
east line of Second end street
easterly 1888 feet.
At a point ISL. feet east of the
west line of Fourth (4thl street
ten (1O) feet south of the north
line Of Eighteenth 0Sth) avenue
extended easterly 41.72 feet.
With a uniform grade between
said points as hereinbefore fixed.
The elevation of the flow line OF
the 60-inch storm sewer along
Eighteenth (1Sth) avenue as here
inbefore described shall be as fol-
lows:
At point 1006.5 feet east of the
east line of Fourth 9TH street,
said 1006.5 feet being measured
along the center line Of said sewer
on Eighteenth (1Sth) avenue from
the west line of Fourth 9th street
easterly 1856 feet.
At point ten (l0) feet south of
the north line Of Eighteenth t1Sth)
avenue extended easterly and
twenty-six and one-half t261s)
feet east of the west line OF Fourth
9TH street 1922 feet.
With a uniform grade between
said points as hereinbefore fixed.
The elevation of the flow line of
the 54-inch branch storm sewer on