The inspection, handling, storage, installation
and testing of all piping and appurtenances shall conform to AWWA
C600 Specification for any typical installation details which may
pertain to the public water main.
Special care in handling shall be exercised
during delivery and distribution of pipe and appurtenances to avoid
damage. Damaged materials shall be rejected and replaced at the contractor's
expense. The pipe shall be stored prior to use in such a manner as
to prevent damage and keep the interior free from dirt and foreign
matter. Any pipe that becomes contaminated shall be hand-cleaned and
washed before it is incorporated in the work. It must be stressed
that contamination in the line will prolong and impede the disinfection
operation. Flushing cannot be too heavily relied upon for cleaning
due to the low velocity of water flow.
Each length of pipe shall be marked in accordance
with ANSI Specification A21.51 (AWWA C151) as to manufacturer and
class.
A.
All water mains are to be installed within the public
way. Trenching and excavation in public roadway must be done in accordance
with the specifications of the governmental authority having jurisdiction
over the roadway.
B.
All excavations shall be made in such manner and to
such widths as will provide ample room for properly installing the
pipe and to permit thorough compacting of backfill around the pipe.
Enlargements of the trench shall be made to give ample space for operations
and pipe joints. The depth of trench in general shall be such as to
provide four feet of cover over the pipe, but this depth shall be
increased or, if approved by the Village Engineer, decreased as required
to avoid obstructions, to cross under streams and to make connections.
The contractor shall not use excavating equipment which requires the
trench to be excavated to an excessive width.
C.
The trench shall be excavated to the required alignment,
depth and width and in conformance with all federal, state and local
regulations for the protection of the workmen and public and private
property. Trees, shrubs, fences and all other property and surface
structures shall be protected during construction. Temporary support,
adequate protection and maintenance of all underground and surface
structures, drains, sewers and other obstructions encountered in the
progress of the work shall be furnished by the contractor.
D.
Pipe embedment material shall be placed where shown
or ordered and used for pipe bedding, haunching and initial backfill.
Such embedment material shall conform to AASHTO M43, Size 78, meeting
the following gradation:
[Amended 1-19-1999 by L.L. No. 2-1999]
|
Size
|
WT Percent Passing
|
|---|---|
|
1 inch
|
100
|
|
3/4 inch
|
90-100
|
|
1/2 inch
|
90-100
|
|
3/8 inch
|
20-55
|
|
No. 4
|
0-10
|
|
No. 8
|
0-5
|
E.
Where excavation is in rock, the rock shall be removed
to a depth of at least eight inches below the pipe barrel. The trench
shall be refilled to grade with gravel or crushed stone fill, firmly
compacted to provide proper bedding to the mid-diameter of the pipe.
A.
Installation of piping and appurtenances shall conform
to AWWA C600.
B.
Proper and suitable tools and appliances for the safe
and convenient handling and laying of pipe and fittings shall be used
and shall in general agree with the manufacturer's recommendations.
Deflections, however, shall not exceed 75% of the maximum amounts
recommended by the manufacturer. Care shall be taken to prevent the
bell and cement lining from being damaged.
C.
When it is necessary to cut ductile-iron pipe in the
field, such cuts shall be made carefully in a neat workmanlike manner
using approved methods to produce a clean square cut. The outside
edge of the cut end shall be conditioned for use by filing or grinding
a small taper at an angle of about 30°.
D.
At the close of work each day, the end of the pipeline
shall be tightly sealed with a cap or plug so that no water, dirt
or other foreign substance may enter the pipeline, and this plug shall
be kept in place until the pipelaying is resumed.
E.
No street or public place shall be opened by any person
for the purpose of installing water mains, pipes or fixtures unless
permission shall have been granted by the authority having jurisdiction.
All surfaces must be restored to their original condition at the completion
of work, or in conformance with the conditions of any highway work
permit issued for the work, as appropriate.
A.
Single-rubber gasket joints.
(1)
The single-rubber-type joint shall be made with an
elongated grooved rubber gasket which fits into a socket in the bell
of the pipe. The gasket shall be wiped clean, flexed and then placed
in the socket. Any bulges in the gasket which might interfere with
the entry of the plain end to the pipe shall be removed. A thin film
of lubricant shall be applied to the gasket surface which will come
into contact with the spigot end of the pipe. The lubricant shall
be as furnished by the pipe manufacturer.
(2)
The plain end of the pipe, which is tapered for ease
of assembly, shall be wiped clean and a thin film of lubricant applied
to the outside. The pipe shall be aligned and carefully entered into
the socket until it just makes contact with the gasket. The joint
assembly shall be completed by inserting the pipe past the gasket
until it makes contact with the bottom of the socket. The pipe shall
be pulled home with an approved jack assembly as recommended by the
pipe manufacturer. If assembly is not accomplished by reasonable force,
the plain end shall be removed and the condition corrected.
(3)
For the purpose of electrical bonding, the pipe manufacturer
shall furnish serrated bronze wedges for installation in the horizontal
plane between the pipe barrel and the pipe bell. The contractor shall
install two wedges at each joint, one wedge on each side of each joint
in strict conformance with the manufacturer's instructions.
(4)
It shall be the responsibility of the contractor to
test for electrical continuity throughout any new piping installed
in the presence of the Village Engineer or his representative if any
question of electrical continuity should arise.
B.
Bolted mechanical joints.
(1)
Mechanical joints shall be made up with gaskets, glands
and bolts. When a joint is to be made up, the bell or docket and plain
end shall be cleaned and washed with a solution of mild soap in water;
the gland and gasket shall be slid into the plain end and the end
then entered into the socket until it is fully home in the centering
ring. The gasket shall then be painted with soapy water and slid into
position, followed by the gland. All bolts shall be inserted and made
up hand-tight and then tightened with a ratchet wrench; torque to
be applied to each bolt shall be tightened alternately to bring the
gland into position evenly. Excess tightening up of the bolts shall
be avoided and torsion wrenches shall be used if needed to prevent
excessive tightening. Care shall be taken to assure that the pipe
remains fully home while the joint is being made up.
(2)
Gaskets for all mechanical joints, including valves
and fittings, shall be approved lead-tipped rubber gaskets.
A.
Where shown on plans or where ordered by the Village
Engineer or his representative, the contractor shall provide rodding
to prevent joint separation. The rodding shall comply with generally
accepted standards. Bands shall be 1/2 inch thick by two inches wide.
The bands shall be wrought iron and fabricated to provide a snug fit
behind the pipe or fitting bell. The tie rods shall be three-fourths-inch-diameter
steel threaded rods unless otherwise specified. Before backfilling,
all exposed metal shall receive a heavy coat of bitumastic paint.
B.
The rodding shall supplement as a safety factor and
shall not reduce the thrust blocking requirements.
A.
Concrete thrust blocking shall be provided at plugs,
tees, bends, hydrants and at other locations as may be designated
where a sizable unbalanced thrust will be developed. The blocking
shall be in general of such shape and form that the load due to the
thrust shall not exceed two tons per square foot against earth or
five tons per square foot against rock when the water pressure in
the line is carried at the test pressure. The excavation at such locations
shall receive special attention with such hand trimming as may be
required to provide a good bearing against undisturbed materials within
as short distance as possible from the pipe or fitting.
B.
Where reactions are in the vertical plane, provisions
to restrain the thrust shall be made to meet the existing field conditions
by either concrete anchorages, steel dowels grouted into holes drilled
in rock or a combination of both.
A.
The contractor shall provide restraining rods for
each and every hydrant installation in strict compliance with the
manufacturer's assembly instructions. The rods shall be of three-fourths-inch
size and threaded and assembled as follows: the tee shall be rodded
to the hydrant valve and then from the valve to the hydrant, two distinct
operations. Eye bolts shall be used as directed by the Village Engineer
or his authorized representatives. The rods shall supplement as a
safety factor and shall not reduce the thrust block requirement as
directed.
B.
Hydrants shall be set exactly plumb and to such depth
as directed by the Village Engineer or his representative. They shall
rest upon a selected stone or block or concrete not less than 12 inches
by 12 inches by six inches and shall be similarly backed up to prevent
movement of any kind. Hydrants shall be surrounded by at least five
cubic feet of one-and-one-half-inch crushed stone or gravel. In excavations
where drainage cannot be secured in this way, other arrangements for
damage will be provided as directed. Prior to the completion of the
installations, all hydrants shall be painted with two coats of paint
in accordance with the manufacturer's specifications. Any hydrants
deemed unacceptable shall be reset regardless of prior approval.
[Amended 1-19-1999 by L.L. No. 2-1999]
A.
General backfill and fill materials. The contractor
shall provide approved soil materials for backfill and fill which
shall be free of clay, rock larger than six inches in any dimension,
debris, waste, frozen materials and vegetable, organic and other deleterious
matter.
B.
Immediately after the pipes have been laid, backfilling shall be done with approved material. The material surrounding the pipe shall be carefully placed and carefully backfilled and tamped so as to have a thoroughly compacted material. Backfill material shall be placed evenly and carefully above the pipe in six-inch layers, and each layer shall be thoroughly tamped until one foot of cover exists over the pipe. The remainder of the backfill may be material excavated from the trench containing no stones larger than six inches in diameter but shall be carefully placed and compacted, if the contractor wishes to use excavated trench material, such material shall be stockpiled and tested in accordance with ASTM D698, Method C, including Note 2, so that proctor testing baseline can be established. Testing shall be performed by an approved laboratory. Until excavated material is tested and approved, the contractor shall utilize backfill material specified in Subsection C below.
C.
Suitable backfill.
(1)
If, in the opinion of the Engineer, the material excavated
from the trench is not suitable to be used as backfill, the Engineer
may direct that the trench be backfilled with well-graded granular
material or run-of-bank gravel free from organic matter conforming
to NYSDOT Item 304.02, Type I, with the following gradation:
|
Size
|
WT Percent Passing
|
|---|---|
|
3 inches
|
100
|
|
2 inches
|
90-100
|
|
1/4 inch
|
30-65
|
|
No. 40
|
5-40
|
|
No. 200
|
0-10
|
(2)
A sample of the material shall be submitted for approval.
The Engineer shall be advised in writing of its source and furnished
with certification of conformance with the specification.
A.
Requirements.
(1)
Water mains shall be laid at least 10 feet horizontally
from any existing or proposed sewer. The distance shall be measured
edge-to-edge. In cases where it is not practical to maintain ten-foot
separation, the Orange County Department of Health may allow deviation
on a case-by-case basis. Such deviation may allow installation of
the water main closer to a sewer, provided that the water main is
laid in a separate trench or on an undisturbed earth shelf located
on one side of the sewer at such an elevation that the bottom of the
water main is at least 18 inches above the top of the sewer.
(2)
Water mains crossing sewers shall be laid to provide
a minimum vertical distance of 18 inches between the outside of the
water main and the outside of the sewer. This shall be the case where
the water main is either above or below the sewer. At crossings, one
full length of water pipe shall be located so both joints will be
as far from the sewer as possible. Special structural support for
the water and sewer pipes may be required by the Village Engineer.
B.
The Orange County Department of Health must specifically
approve any variation from the above requirements when is impossible
to obtain the specified separation distance.
C.
No water pipe shall pass through or come in contact
with any part of a sewer manhole.
