The Cairo bulletin., 1906-07-14


side of said sewer, and being concen-
tric with said inside Of said sewer
shall be placed three-quarter (&) inch
steel bars. twelve (l2) inches center
to center, throughout its entire length,
and on the upper half or top Of said
sewer and adjoining the steel bars
last above described shall be placed
mine t9F three-quarter ga inch steel
| bars placed longitudinally with said
sewer and spaced eighteen (1S) inches
center TO center, and in the center OF
! the lower half or bottom OF said seWe.
Shall be placed four (41 three-quarter
| ($4) inch steel bars running longi
tudmally with said sewer ana spaced
eighteen (1S) inches center 10 center
| and adjoining the bars which are CON
centric with the inside OF said sewer.
AT the point where said sewer shall
cross under the railroad tracks Oh
Ohio street, there shall be an addition
al reinforcement placed in the upper
half or top Of said sewer consisting Of
seven ca steel 7 rails thirty (3o)
! feet long and weighing not less than
| fifty (50) pounds to the yard. These
rails shall be drilled SO that the con
centric bars above described SHALT
pass through the web of said I rails,
and the said rails shall be spaced not
more than eighteen 0S) inches CEN
ter to center. Said steel bars and
steel rails shall be accurately spaced
and set in the concrete during the
construction OF the sewer. At Il
point thirty-two (32) feet east OF the
east line of Ohio street, there shall
be placed on each side Of said sewer,
OF four (4) feet internal diameter,
wing wall for anchorage, which
shall be twelve (l2) inches wide al
| tla bottom aad six 90 meme timex.
II shall be triangular in shape and the
| face adjoining the outside diameret
OF the sewer shall be thrty-six (3G)
inches in height At a distance OF
three CD inches from the outside OF
the wall or shell of said sewer shall
be placed one three-qnarter "a lnch
steel bar of $1,000 pounds tensile
strength, extending from the bottom
Of the wing on one side and around
the top of said sewer to the bottom
of the wing on the other side. On the
side adjacent to the Ohio river OF the
above described wing walls shall be
/ placed ten (l0l inch by ten t10)
inch white oak post eight 80 feet in
length at each Of the wings. They
shah be placed vertically in the
ground and no more than one and
one-half 01a) feet Of the same shall
| be above the top surface of the
ground. Said wing walls and anchor
posts shall be placed at every twenty
! C20) feet ON each side Of said sewer
from the above described point TO the
low water line in the Ohio river.
Paragraph -. One Cd main gate
of six 60 feet internal diameter shall
be placed In said Tenth street sewer
twenty-five (25) feet east Of the west
| line of Ohio street, and it shall be Of
the kind and pattern known as the
flap valve and shall consist OF cast
! iron collar two GU inches in thickness
and seventy-two (72) inches internal
diameter, on to which shall be hinged
with three and one.quarter (3H)
i inch steel pin, the gate valve. SaNl
gate valve shall consist of a two 90
! inch cast iron ring on to which shall
be riveted two three-eights (as) steel
plates covering the space inside Of
| the ring. Said steel plates shall
be thirteen G3) inches apart at the
center and arched so as to meet each
other at the cast iron ring on to which
they are riyeted with tiFe-eights t9sl
! inch steel rivets. The valve bearing
| shall consist of two bronze rings,
one.half (l2) inch by two (2) inches
accurately ground to true parallel
/ faces forming a water-tight bearing
| fitted one each on the collar and on
! the valve. The hinge bearing shall
consist of habit bushing and brass
sleeves Said gate shall conform ac-
curateIy to the drawings as shown in
the plans, now on file in the office of
the City Engineer of the said City Of
/ Cairo.
Paragraph %. For the operation OF
| said main gate a specially constructed
manhole shall be built in the said
Tenth street sewer above said gate,
at the distance of twenty-five $3.50
/ feet east of the west line of Ohio
street which manhole shall be conf
cal in shape. The bottom of said man.
hole shall be a circle with an internal
diameter of seven ca feet. The top
OF said manhole shall be a circle of
itU' tt' feet internal diameter. Said
-~'h-ia ST. all he constructed of the
s.~' ind and quality of concrete as
'hai here ntefore provided for the con
, s-ucu-l OF 0aid sewer. The walls OF
-Ii' m91hole shall be six go inches
-u thickness. Said manhole shall be
provided with cast iron cover with
perforated lid the combined weight
of which shall not be less than three
hundred and twenty-five (325) pounds
There shall be placed in said manhole
ithree-quarter ca inch wrought iron
Steps firmly embedded in the walls
and euaooI tyvaIvo f19t inches cputpr