Prior to the Township's approval of a final subdivision
plat or the acceptance or approval of any public utility, or other
improvements, acceptable construction record drawings must be submitted
to the Director.
Construction record drawings shall contain all the information
shown on the approved construction drawings with the addition of,
but not limited to, the following as-built information:
A. Sanitary sewers and storm sewers.
(1) GPS locations for each manhole and all force main bends.
(2) Length of sewer as measured between manholes shown on both plan and
profile sheets.
(4) Manhole, inlet, and catch basin cover as-built elevations.
(5) Construction record invert elevations of pipes within each structure.
(6) Construction record percent of grade between manholes.
(7) Any changes to the total quantities shall be shown.
B. Retention and detention ponds.
(1) Construction record dimensions and sufficient additional information
to calculate final volume. Certification of final computed volume
of the pond as measured from high-water elevation to the invert of
the outlet pipe shall also be provided.
(2) Construction record location and all dimensions of the overflow structure,
and other physical improvements, including fence and gate sizes and
locations.
(3) The following construction record elevations:
(b)
Inlet and outlet pipe inverts.
(d)
Spillway elevations at fifty-foot intervals.
(e)
Outlet and inlet ditch elevations at fifty-foot intervals.
(f)
Top- and bottom-of-bank elevations at fifty-foot maximum intervals.
C. Water mains.
(1) Construction record location of all water mains with respect to property
lines.
(2) Rim elevations on gate wells.
(3) Top-of-pipe elevations at gate wells.
(4) Fire hydrant duty line elevations.
(5) Distances between gate wells, fittings, and fire hydrants.
(6) GPS locations for all water system structures.
All construction record plans shall contain a statement by an
engineer or land surveyor, who is currently registered in the State
of Michigan, certifying the drawings to be construction record. All
plans shall be sealed and signed by the certifying registered engineer
or surveyor.