New public sanitary sewers and all extensions
to public sanitary sewers shall be properly designed in accordance
with the Recommended Standards for Sewage Works, as adopted by the
Great Lakes Upper Mississippi River Board of State Sanitary Engineers
and in strict conformance with all requirements of the New York State
Department of Health. Plans and specifications shall be submitted
to and approval obtained from the Town Engineer, County of Onondaga
and New York State Department of Health before construction may proceed.
The design of the sewers shall anticipate and allow for flows from
all possible future extensions or development within the immediate
drainage area.
Sewer design shall be in accordance with the
following provisions:
A. Pipe material, installation, etc.
(1) Pipe material shall be either asbestos-cement, conforming to ASTM Specification C-428, Type III; extra strength vitrified clay conforming to ASTM Specification C-76. No standard strength clay pipe or nonreinforced concrete pipe shall be used. Minimum internal pipe diameter shall be eight inches. Joints for each kind of pipe shall be designed and manufactured such that "O" ring gaskets of the "snap-on" type are employed. Gaskets shall be continuous, solid, natural or synthetic rubber and shall provide a positive compression seal in the assembled joint such that the requirement of §
166-11 are met. Joint preparation and assembly shall be in accordance with the manufacturer's recommendations. Wye branch fittings shall be installed for connection of street laterals in accordance with §
166-17F. Trench widths as measured just above the crown of the pipe shall be exceeded by the following:
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Pipe Diameter
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Trench Width
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8 inches
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3 feet 3 inches
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10 inches
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3 feet 6 inches
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12 inches
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3 feet 9 inches
|
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14 inches
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4 feet 0 inches
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15 inches
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4 feet 1 inch
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16 inches
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4 feet 2 inches
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(2) If the trench widths are found during field inspection
to exceed the limits in the above table, the sewer pipe shall be encased
with a minimum of six inches of concrete for the length of trench,
which width exceeds the maximum.
B. Laying pipe; additional requirements. Pipe shall be
firmly and uniformly bedded in a minimum depth of three inches of
No. 1A or No. 1 crushed stone (NYSDPW Specification) or other approved
method of bedding. Pipe wall thickness and field strength shall be
calculated on the following criteria:
(3) Weight of solid: 120 pounds per cubic foot.
(4) Wheel loading: 16,000 pounds.
C. Design; minimum safety factor. Utilizing the foregoing
information, design shall then be made as outlined in Chapter IX of
the Water Pollution Control Federation Manual of Practice No. 9, Design
and Construction of Sanitary and Storm Sewers, and pipe shall have
sufficient structural strength to support all loads to be placed on
the pipe, with a 50% safety factor as listed above.
D. Manholes. Manholes shall be constructed at all changes
in slope or alignment, and at intervals not exceeding 400 linear feet.
The manholes shall be constructed with a poured 3,000 pounds per square
inch concrete base 12 inches thick, steel troweled concrete bench
walls and channels carefully shaped for smooth flow, precase four-foot-diameter
concrete manhole barrel sections and a concentric tapered top section
conforming to ASTM Specification C-478. All joints shall be sealed
against infiltration. The manhole frame and cover shall be the standard
design of the Town and shall be set in a full bet of mortar with no
less than two courses of brick underneath to allow for later adjustment
in elevation.
All sanitary sewers and extensions to sanitary
sewers constructed at the property owner's, builder's or developer's
expense, after final approval and acceptance by the Town Engineer,
shall become the property of the Town and shall thereafter be maintained
by the Town except such works as may be constructed under the provisions
of the Transportation Corporations Law. Said sewers, after their acceptance
by the Town, shall be guaranteed against defects in materials or workmanship,
for one year by the builder or developer. The guarantee shall be in
such form and contain such provisions as required by the Town Board,
secured by a surety bond or such other security as the Town Board
may approve.
No property owner, builder or developer shall
be issued a building permit for a new dwelling or structure requiring
sanitary facilities within the Town unless a suitable and approved
method of disposal of sewage conforming to the provisions of this
chapter is proposed.
Any person constructing, or causing to be constructed,
sewage works or any part thereof must present a certificate of insurance
showing suitable liability insurance before a permit will be issued
for construction of same.