The Cairo bulletin., 1906-07-14
ORDINANCE NO. SO.
(Conclnded from Second Page)

paragyaph 1G The bottom OF the
inside OF said sewer at its place OF pc
ginning shall be eighteen and seventy
one one hnndredlhs tlS7D leet below
the grade OF the said avenue below
Twentieth street, that Is, eighteen anu
seyenth-one One-hundredths AlS.I)
feet below the top surface OF the stone
monument at the southwest corner OF
said avenue and Sixth street, in said
City or Cairo. and from thence it
shall fall gradually and uniformly at
the rate of thirty one-hundredths
f2O-100) per centum 10 a point 1ln
manhoe in Ohio street. twenty-five
t25) feet east Of the west line there
of at which point the bottom OF the
inside of said sewer shall be- nineteen
and seyentysiX one-hundredths i976).
feet below the said grade 81 the san
avenue Al the last above described
point. the bottom Of said sewer shall
decline vertically to twenty and TWEEN
ty-six one-hundredths (2026) feet be-
low the aid grade of the said avenue,
ana SHALL then decline gradually ana
uniformly. on a thirty one-hundredths
(o0-100) per centum grade, 70 a point
twelve (f2) feet east Of the east line
Of Ohio street, and from thence ~
shall decline at the rate OF twenty-five
fo2l per centum to the low water line
of the Ohio river, and from thence It
shall run parallel with said low water
line to its terminus its place OF out
let. l9t
Paragraph II. Two 81 manholes
shall be built in said Tenth street
sewer one CT which shall be located
al its point of beginning al the east
line Of said Commercial avenue, and
one of which shall be located al the
west line of Ohio street. Said man
ho 5 shall be constructed as /. here
matter described
Paragraph 49, The said main sew
crs hereinbefore described shall be
constructed of American Portland
concrete, composed of four % parts
of clean. hard broken or crushed
limestone of sizes which will pass
through ring Of three-fourths "a Of
an inch internal diameter, one (ll
pant If the hest qaaiit7 o. dae OF
American Portland cement and two
t2} parts Of clean, sharp sand ana
the interior OF the said sewers shall
he circular in shape or form and the
exterior contour or shape thereof
shall be that of a horseshoe,
n nppn11'ipU the
satd concrete ali materials shah be
actually measured for each batch. In
mixing. The and shall be spread Odt on
a suitable platform or box aad the
cement deposited upon it. These shall
then be thoroughly mixed dry until
the whole is of an even uniform col
or Sufficient clean water shall then
be added 70 form a THICK paste. The
stone which has previously been wet,
but containing no loose water in the
heap. shall then be added and the
whole quickly and Thoroughly mixed,
until every stone is coated with the
mortar ri necessary, water may be
added by sprnkIine to obtain the prop
er consistency Concrete must not be
mixed in quantities greater than is
required for immediate use, and any
concrete which has begun TO set shall
not he retemperod or used in any way.
Concrete shall then be lowered into
the trench in buckets or boxes or by
other suitable means and deposited in
layers not to exceed nine 90 inches
in depth in the sewer forms and set
lied by thoroughly ramming lightly,
sufficiently to bring the water TO the
surface One % cour @ shall fol-
low another as rapidly as possible.
When fresh concrete is to be placed
in contact with that already set or
partly set, all loose stones or concrete
not thoroughly compact shall be ro-
moved from the surface of the lat
'cr. which hall be washed clean and
given a thin coat of mortar If such
q surface be set hard. it shall be pre-
vi0usly. thoroughly watersOaked.
When he concrete is in place, all
wheeling working or walking on the
same must be prevented until II Is
firmly set and until such time it shall
be kept damp and protected from the
sun. Smooth forms and centers to
give the concrete the desired form
shall be furnished by the contractor
without extra charge. These shall b.
efficiently stiff and substantial to re-
tain the concrete firmly in place and
shall not be withdrawn until the con
crete has completely set. No con
crete shall be mixed or used when The
temperature Is below thirty-two de-
graes Fahrenheit Immediately after
the forms have been removed the Out
side of all concrete arches and the
invert Of the sewer up 10 the hori-
zontal diameter of the same shall be
plastered and thoroughly SEE trBweled
smooth with one-half ~ inch coat
Of cement mortar. composed of one
% part Of cement and one and one
half QtsD paris OF sand. the inside
az the sewer above the inycrt shall be
thoroughly plastered where any ire
Eularities occur VITA The same kind
of mortar. Immediately after the forms