The following regulations, standards and guidelines define the
general design criteria to be adhered to for all public water supply
systems in Cannon Township:
A. Safe Drinking Water Act, Act 399 PA 1976, as administered by the Michigan Department of Public Health
(MDPH).
B. Suggested Practice for Waterworks Design, Construction and Operation
in accordance with the Safe Drinking Water Act prepared by the MDPH.
C. Standards of the American Water Works Association.
D. Standards of the American Society of Testing and Materials.
E. Standards of the American National Standards Institute.
F. Fire Insurance Rating Guidelines of the Insurance Services Offices
(ISO).
In addition to the general standards stated above, Cannon Township
adopts the following specific design standards for public water supply
systems in Cannon Township:
A. All public water systems in Cannon Township shall be capable of supplying
water for fire protection, in addition to peak domestic demands. Needed
fire flow shall be based on criteria established by ISO.
B. All public water systems in Cannon Township shall be designed considering
the ultimate development of the system service area. The system supply
rate shall be based on a study of projected water use acceptable to
Cannon Township and the MDPH. If the public water system is proposed
to be built in phases by a developer, the developer shall provide
Cannon Township with a letter of credit for the cost of the construction
of future phases of the public water system in the manner required
by Township ordinance or a written agreement between the Township
and the developer.
C. An updated reliability study, as defined by the Safe Drinking Water
Act and approved by the MDPH, shall be provided with all requests
for proposed extensions of existing public water systems in Cannon
Township.
D. All public water systems in Cannon Township shall include looped
water mains to ensure a reliable and continuous supply to all customers.
Dead-end mains shall be prohibited unless adequate provisions are
made for future looping connections.
(1) A dead-end main shall not be permitted to exist for a period greater
than 24 months after construction, unless a longer time period is
approved by the Township Board. The Township Board may approve a longer
time period only if the owner or operator of the public water system
demonstrates that the following criteria have been satisfied:
(a)
Strict enforcement of the twenty-four-month period would involve
practical difficulties or would cause undue hardship;
(b)
A longer period of time would be consistent with the spirit
and intent of these uniform standards; and
(c)
A longer period of time would not materially diminish the public
health, safety and welfare.
(2) A temporary dead-end main shall not be permitted if that portion
of the main is designed to serve nine or more residential units, unless
a greater number of residential units is approved by the Township
Board. The Township Board may approve a temporary dead-end main for
a greater number of residential units only if the owner or operator
of the public water system demonstrates that the following criteria
have been satisfied:
(a)
Strict enforcement of the eight-unit maximum would involve practical
difficulties or would cause undue hardship;
(b)
Allowing a greater number of units would be consistent with
the spirit and intent of these uniform standards; and
(c)
Allowing a greater number of units would not materially diminish
the public health, safety and welfare.
E. All public water systems in Cannon Township which do not include
elevated water storage shall include a standby power supply which
will allow for an uninterrupted supply of water to all system customers.
F. All distribution and transmission mains shall be properly sized,
based on a design using computer modeling to verify anticipated system
performance.
G. Any standard for public water systems defined by Cannon Township
shall take precedence over the Standard Construction Specifications
of the Kent County Department of Public Works when a conflict exists.
Whenever there is a conflict between the general standards referred
to above and the specific design criteria adopted by Cannon Township,
the most stringent requirement shall be applied.
H. The following specific standards shall apply to the design and construction
of all public water systems in Cannon Township:
(1) Eight-inch minimum water main size.
(2) Six-inch minimum fire hydrant lead size.
(3) Ductile iron pipe shall be Class 52.
(4) 400-foot maximum distance between fire hydrants.
(5) Fire hydrant pumper connection shall be in accordance with City of
Grand Rapids Standard Detail W-12.
I. Any request for an extension to an existing public water system or
for a new public water system shall be reviewed for Cannon Township
by its Township Engineer and Township Fire Chief and, in addition,
by the affected water system superintendents, prior to any submittal
to the MDPH for a construction permit, which review is subject to
final approval by the Township Board and/or Planning Commission in
accordance with all applicable Township ordinances.
J. All well houses, well sites and water storage facilities for public
water systems in Cannon Township shall have paved access roads, security
fences and alarm systems acceptable to Cannon Township.
K. All groundwater supplies shall be protected from pollution by adequate
wellhead protection and site isolation from potential pollution sources.
These uniform standards specified in Article
II cover and apply only to those public water supply systems in the Township that were placed in operation on or after December 23, 1991. In addition, these uniform standards cover and apply to all extensions or modifications made to an existing public water system on or after December 23, 1991, irrespective of whether the original water system was placed in operation before December 23, 1991.