Willmar tribune. [volume] (Willmar, Minn.) 1895-1931, 1916-08-16

The Contractor snail, Wnen request
ed, provide the engineer or members
of the sewer committee with ladders,
tools or other facilities as may be
necessary for inspecting material
and work.
The prices made on such extensions
to the sanitary sewer system shall be
made on the basis of unit prices; in
Guiding excavations of any kind, back
filling, putting street In condition, re-
moving surplus material, pump sheet
ing, bailing and all materials neces-
sary for the complete construction OF
the work.
Measurements for lengths of sewers
will be made along the surface of the
street. Depths will be measured from
the original surface of the ground to
the invert of the sewer.
The contractor will be required to
make all excavations by open cut
from the surface. The trench will be
excavated along the line designated
by the engineer and to the depth ne
cesssary for laying the sewer to the
required grade.
All trenches shall be dug one foot
wider at the bottom than the outside
diameter of the pipe When the orig
inal earth is sufficiently solid and
compact for firm foundation the con-
tractor shall excavate the bottom of
the trench to conform to the external
form and dimension of the pipes used.
The bottom of the trench under each
bell shall be followed out so as to al
low the body of the pipe to have a
bearing throughout the trench bottom
and permit of making the joint. In
case a trench is excavated below the
proper grade, it shall be refilled to
grade with sand or gravel without
extra compensation.
The excavation for all manholes
and other accessories shall be suff1c-
lent to leave at least s inches in the
clear between their outer surfaces
and the embankment or t1mbers
which may be used to protect it.
All supplies and material shall be
removed by the contractor and the
street put in condition practically
as good as before the work was COM
menced satisfactory to the council.
All pipes must be laid to exact
grade and true line. The interior of
the pipes shall be carefully cleaned
of all dirt, cement or superfluous ma
terial of every description and a wad
or sack filled with hay and made
large enough to fill the diameter of
the pipe and attached to a rod or cord
shall at all times be kept in the pipe
and drawn forward as the work pro-
crosses and the sewer left absolutely
clean and smooth.
conform to grade and line will be re-
q
the expense of the contractor.
Before leaving the work for the
night or during a. storm, or if for any
reason the work on the pipe line is
suspended, care must be taken that
the unfinished end is securely closed
with tightly fitting wooden plug.
The joints between the Individual
pipes and specials shall in all cases
be made as near water tight as posi-
BILE with ordinary workmanship by
completely filling the annular space
between the exterior Of the spigot and
the interior of the hub or socket with
cement mortar, the cement mortar
shall be pressed into the space men,
toned, special care being taken to Sc.
cure perfect filling of the aforesaid
annular space at the bottom and sides
of the pipe as we'll as on the top; and
: previous to the Introduction of the
mortar, said space together with the
surface OF the pipe bounding the
same shall be thoroughly cleaned all
around from dust, sand, dirt and wat.
CIR. II the trench is wet, a gasket OF
oakum previously dipped in cemen,
erout or other approved material
shall be pressed into the joint around
the entire circumference of the pipe
and the bags or long sacks containins
:. mortar shall then be pressed into the
space between the socket and the spi
got, the same as specified above.
After making the joint as above
= specified, a neat and proper finish
shall be given to the joint by the fur
Their application of the same kind o.
mortar to the face of the hub or sock
ct, so as to form an even, smooth bev
eled surfaced joint from the exterior
of the socket to the exterior of the
!. connecting pipe all around.
- All mortar used for making thu
joint shall be composed of one part o.
approved Portland cement mixed with
, an equal amount of clean, sharp
- coarse sand, properly mixed and tenn
pered with sufficient water to form Z
stiff paste. Any mortar which has
: begun to set before being used must
y not be used.
E All sewer pipes shall be standard
salt glazed, vitrified clay pipe of the
: first quality. All pipes and specials
shall be sound and we'll burned thru.
: out their thickness, impervious tc
moisture and we'll glazed exterior
and interior surfaces, free from
| cracks, flaws, blisters and other i'm
PROJECTIONS, circular in bore of true
form in their lengths, whether curved