Except as otherwise provided herein, no residential, commercial
or industrial subdivision or development including single lots shall
be approved unless it is served by sanitary sewers connected to the
City sewerage system.
Sewer shall be laid straight in both horizontal and vertical
planes between manholes, unless otherwise approved by the City Engineer.
Sanitary sewer of different diameter shall join only at manholes,
except that a four-inch-by-six-inch increaser may be used for a single-family
detached dwelling if a sweep bend tee wye cleanout is provided five
feet outside the house foundation when approved by the Director of
Public Services based upon advise of the City Engineer. The invert
elevations shall be adjusted to maintain a uniform energy gradient
by matching the 0.8 depth points of different diameters.
Whenever possible, sanitary sewerage facilities shall be designed
so as to avoid the necessity of providing lift stations.
A. If a lift station is part of the engineering design, it shall be
shown in plan and elevation. Specifications for said lift station
shall be submitted with engineering plans. Lift station shall be of
the submersible wet well type, and shall conform in all respects to
the standards established by the City Engineer and the Michigan Department
of Environment, Great Lakes and Energy (EGLE).
B. A separate source of power (mobile or stationary) shall be furnished
to each lift station, as recommended by the City Engineer. This shall
be from another electrical source or provided by a separately powered
engine. The engine, enclosure and mounting shall be subject to approval
by the City Engineer. A remote alarm with phone service and automatic
dialer shall be installed and maintained to indicate failure at the
lift station.