[Ord. No. 1711 §§1 — 3, 9-13-2004]
A.
General. Proposed extensions of the water distribution system
shall, in general, follow the pattern established in the Water Facilities
Plan as adopted by the City of St. Robert. Deviations from this general
policy may be deemed necessary by the Director of Public Works should
the provision of adequate service to prospective customer or fire
protection needs, existing or anticipated, in the area to be served
warrant said deviations. No public water line shall be constructed
less than size (6) inches in diameter (except for two (2) inch PVC
lines permitted on cul-de-sacs).
B.
Location Of Water Mains And Appurtenances. Proposed
water mains shall be so located within the street right-of-way to
provide the least interference with the location of other utility
lines. Street grades and elevations of proposed mains shall be taken
into consideration so that once constructed they will not require
regrading or relocation.
[Ord. No. 2723 §§1 — 3, 10-20-2014]
1.
Service lines under streets shall be installed from the main
to the limits of the street right-of-way and shall be installed prior
to construction. Service lines outside of streets shall extend at
least to the street right-of-way or terminate within the easement
2.
All service lines shall have warning tape labeled ("Buried Water
Line Below") eighteen (18) inches below final grade of all water lines.
The contractor shall also install a tracer wire mounted on top of
the pipe that shall be #12 (minimum) blue in color Copperhead clad
steel wire housed in a polyethylene coating, as manufactured by Copperhead
Industries. Splicing shall be with 3M DBY/DBR Direct Bury Splice Kit
or approved equal.
3.
Water meter barrels shall be placed in the right-of-way or easement in a green space outside of driveways, parking lots or roadways. The tracer wire as described in Subsection (B)(2) above shall terminate in the meter barrel with no less than eighteen (18) inches of extra wire inside the barrel for locating purposes.
C.
Depth. All water mains shall have a minimum cover of forty-two
(42) inches.
D.
Material Of Construction. Ductile iron pipes or PVC shall
be used for all mains constructed in the City of St. Robert.
1.
The ductile iron shall conform to ANSI A21.51; ASTM A536, Grade 60-42-10;
AWWA C151. The minimum nominal thickness class for ductile iron pipe
shall be fifty (50), unless otherwise designated by the Director of
Public Works.
2.
Joints, unless otherwise specified, shall be of the push-on type
conforming to ANSI A21.11/AWWA C111, except gaskets shall be synthetic
rubber. Natural rubber will not be acceptable. The pipe shall be cement
mortar lined conforming to ANSI A21.4/AWWA C104 and shall be coated
inside and out with a bituminous coating.
3.
Ductile iron fittings shall be complete with megalug restraint
devices for nominal pipe sizes 3 inch through 36 inch and shall consist
of multiple gripping wedges incorporated into a follower gland meeting
the applicable requirements of ANSI/AWWA C110/A21.10. Joints shall
be of the standard mechanical joint type conforming to ANSI A21.10/AWWA
C104 and shall be coated inside and out with a bituminous coating.
[Ord. No. 2723 §§1 — 3, 10-20-2014]
4.
PVC pressure pipe shall be designed to carry potable water at
pressures (including surge) up to the maximum class rating. Materials
from which the pipe, couplings and fittings are manufactured shall
conform to ANSI/AWWA C900 DR18, ASTM D1784 Cells Class 12454. Two
(2) inch CTS PE-3409 SDR-9 PR 200 PSI AWWA C901 PC200.
[Ord. No. 2723 §§1 — 3, 10-20-2014]
5.
All PVC pipe shall conform to the latest revisions of ASTM D2241,
Department of Commerce PS22-70 (SDR-PR) pressure rated pipe and National
Sanitation Foundation Testing Laboratories (NSF). Pipe ends shall
be tapered to accept gasketed couplings. Flexible elastomeric gaskets,
meeting the requirements of ASTM F477, shall be synthetic rubber.
6.
The couplings and fittings shall accommodate the pipe for which they
are used. The minimum pressure ratings shall be two hundred thirty-five
(235) p.s.i for couplings and two hundred fifty (250) p.s.i for the
fittings.
E.
Fire Hydrants. Fire hydrants shall conform to AWWA C502
and shall be American Flow Control American-Darling 5 1/4 B-84-8-5
or approved equal. (Note: Fire hydrants shall be purchased from the
City by the developer.)
[Ord. No. 2723 §§1 — 3, 10-20-2014]
1.
Hydrants shall be traffic models with breakaway flanges and shall
have one (1) four and one-half (4½) inch pumper nozzle and
two (2) two and one-half (2½) inch nozzles. All hydrants shall
be furnished with auxiliary gates valves.
2.
Hydrants should be placed at or near street intersections and at
intermediate points when block lengths become long. Under no circumstances
shall the spacing of fire hydrants exceed six hundred (600) feet in
residential areas or three hundred (300) feet in commercial areas.
3.
Fire hydrant installations shall conform to the standard drawings.
F.
Line Valves. Gate valves shall be of the resilient-seated
configuration and shall conform to the applicable requirements of
AWWA C509.
1.
Resilient-seat gate valves shall be American-80 "CRS" or Mueller
A-2370-20 or approved equal.
2.
Gate valves shall be used in all water mains twelve (12) inches in
diameter and smaller.
3.
Butterfly valves shall conform to AWWA C504 and shall be American
(Class 150B), Mueller "Line Seal III" or approved equal. Butterfly
valves shall be used in mains larger than twelve (12) inches in diameter
or where otherwise approved by the Director of Public Works.
4.
Valves shall be placed in all straight runs of pipe at intervals
not to exceed eight hundred (800) feet. Where two (2) lines intersect,
a valve should be placed in each pipe on each side of the intersection.
Valves should be so placed that any pipe two (2) blocks long can be
cut out of the general circulation without interrupting service in
the rest of the system.
5.
Extension stems shall be provided for buried valves when the operating
nut is more than three (3) feet below finished grade. Each extension
stem for a buried valve shall extend to within three (3) feet of the
ground surface, shall be provided with spacers that will center the
stem in the valve box and shall be equipped with a wrench nut.
G.
Tapping Sleeves And Valves. Tapping sleeves and valves shall
be used where required to connect to existing in-service mains.
1.
The valves shall be two hundred (200) p.s.i, resilient-seated, cast
iron body, non-rising stem gate valves conforming with all applicable
requirements of AWWA C509 and shall be Mueller "No. A-2307-16" or
an approved equal. Each tapping valve shall be provided with a flanged
inlet end designed, faced and drilled for connection to the outlet
end of the tapping sleeve. The outlet end of the tapping valve shall
be provided with a tapping flange for attachment of a standard drilling
machine and also with a mechanical joint-type bell end for connection
of the branch main.
2.
Tapping sleeves shall be of the flanged-outlet type designed for
attachment to the flanged inlet end of the tapping valve and shall
be provided with mechanical joint ends at each end of the run and
shall be Mueller "No. H-615" for ductile iron pipe or approved equal.
H.
Connections To Existing Water Mains. Connections to existing
water mains shall be made in such a manner as to provide the least
amount of interruption to water service. In the event closing of valves
to make a connection will affect a customer who cannot be without
service, provisions shall be made on the plans for a temporary service.
I.
Provisions For Future Extensions Of Water Mains. At the
termination of all water mains or at locations as specified by the
Director of Public Works, a dead-end assembly in accordance with the
specifications of the City of St. Robert shall be provided to allow
for future water main extensions.
1.
Flushing assemblies shall be used at locations as required to provide
for thorough flushing of all water mains in the project area. Whenever
practical, water mains five hundred (500) feet and longer shall be
provided with a fire hydrant for flushing.
J.
Thrust Blocking. Reaction blocking of adequate size shall
be provided at all tees, elbows and bends to resist all resultant
thrusts due to hydrostatic pressure. All blocking shall conform to
the standard drawings.
K.
Highway And Railroad Crossings. All crossings of highways
or railroads shall be made by boring or tunneling. The work shall
be in conformity with all requirements and regulations and be under
the control of the authority owning or having jurisdiction over and
control of the right-of-way in each case.
L.
Street Crossings. Open cutting of streets shall be allowed
only where permitted by the Director of Public Works. At locations
where open cutting is not permitted, the crossing shall be made by
boring or tunneling. Crossings made by boring or tunneling shall require
a casing pipe unless otherwise approved by the Director of Public
Works. All work and materials shall be in conformity with all requirements
of the technical specifications of the City of St. Robert. The diameter
and length of the casing pipe to be used shall be as determined by
the Director of Public Works.
M.
Fire Flow Requirements. Public improvement plans for water
line projects serving development sites other than single-family or
duplex subdivisions shall be reviewed for fire protection sufficiency.
The City Fire Chief shall determine the amount of water that is required
for fire protection based on I.S.O. guidelines for the proposed type
of structures to be built within the development. The design engineer
shall obtain the flow requirement and then determine if the existing
operating conditions and calculations verifying that the required
flows can be met shall accompany the drawings when submitted for approval.
