It is the purpose of this section to establish and define the public improvements which shall be provided by the proprietor, at his or her expense with or without reimbursement from any public agency or improvement district, as conditions for final plat approval.
(A) Wastewater treatment.
(1) When a proposed subdivision is located within the service area of a public sanitary sewer system with adequate capacity, or when connection to a public sanitary sewer system having adequate capacity is proposed regardless of the location of service area boundaries, a sanitary sewer system consisting of appropriate sewer lines, lift stations and other sanitary sewer system appurtenances shall be provided by the proprietor. This system shall meet all requirements of governmental agencies that have jurisdiction.
(2) In areas outside of the public sanitary sewer service area septic tanks and disposal fields may be utilized so long as they comply with all requirements of Ingham County and the State of Michigan.
(3) All or part of a subdivision may be served by an on-site community wastewater treatment system, subject to the requirements of Ingham County and the State of Michigan.
(B) Water supply.
(1) When a proposed subdivision is located within, adjacent to or reasonably near the service area of a public water system with adequate capacity, a water distribution system consisting of appropriate water distribution mains, fire hydrants and other water system appurtenances shall be provided by the proprietor. This system shall meet all requirements of governmental agencies that have jurisdiction.
(2) In areas outside of the public water system service area, individual wells or on-site community wells may be permitted. Individual and community wells shall comply with the requirements of Ingham County, the State of Michigan and the township.
(C) Storm drainage.
(1) An adequate storm and surface water drainage system that meets all requirements of the township and the Ingham County Drain Commissioner shall be required. The storm drainage system, which may consist of storm sewers, drain inlets, manholes, culverts, bridges, sedimentation basins, sump pumps and natural and constructed components, shall be subject to Drain Commissioner approval.
(2) A subdivision grading plan shall be submitted prior to final preliminary plat approval. The grading plan and the plan for managing storm water flow shall be designed to not adversely affect neighboring properties and natural features, or worsen downstream flooding and water quality. Lots shall be laid out so as to provide positive drainage away from all buildings and individual lot drainage shall be coordinated with the general storm drainage pattern for the area. Drainage shall be designed to avoid increased flow of storm water from one lot onto adjacent lots.
(3) Surface water management systems shall be designed to retain the natural function and value of any wetland, water body, or watercourse, and to not increase flooding or the potential for pollution of surface or groundwater, either on-site or off-site, from such pollutants as sediment, nutrients or toxic substances.
(4) Existing surface water flow entering the site shall be received and discharged as nearly as possible in the manner prior to the development. Both peak flow and run-off volumes shall be maintained as nearly as possible at predevelopment levels.
(5) The grading of lots shall be such that surface water drains away from building foundations and toward swales, ditches, retention areas or drainage structures. Surface water from all roofs and paved areas shall be collected at intervals so that it will not obstruct vehicular or pedestrian traffic and will not create nuisance ponding in paved areas.
(6) Wetlands may be used for on-site detention or retention of surface water if the proprietor demonstrates that such use will not have an adverse effect upon ecological and hydrological characteristics of the wetland. Final preliminary plat approval shall not be granted until all necessary federal, state, county and township wetland permits are obtained.
(7) If the township or the County Drain Commissioner accepts or requires storm water retention or detention ponds, the ponds shall be designed based on the following guidelines:
(a) The maximum side slope for such ponds shall not exceed a one-foot rise per five-foot run.
(b) The outside edges of the ponds shall provide adequate space for landscaping, which shall be depicted on a landscape plan.
(c) Landscaping around ponds that border existing or proposed single-family residential development shall be consistent with the standards for greenbelt plantings contained in the Zoning Ordinance.
(d) Ponds shall be designed to appear as a natural landscape feature. Accordingly, a curvilinear shape is generally desired. Where feasible, ponds shall be incorporated into common subdivision open space.
(D) Soil and sedimentation control.
(1) In the event that any subdivider or developer intends to make changes in the contour of any land proposed to be subdivided, developed or changed in use by razing, excavating, removal or destruction of the natural topsoil, trees or other vegetative covering thereon, the property owner or his or her agent shall first apply to the Ingham County Drain Commissioner for approval of a plan for soil erosion and sedimentation control.
(2) No certificate of occupancy shall be issued until:
(a) Final grading has been completed in accordance with the approved final plat;
(b) The lot has been covered with soil with an average depth of at least six inches which shall contain no particles over two inches in diameter, except those portions covered by buildings or streets, or where the grade has not been changed or where natural vegetation has not been seriously damaged; and
(c) The lot has been seeded, covered with sod or covered with the appropriate ground cover. Where, because of seasonal conditions final grading will be delayed, the township may accept a performance guarantee as described in § 155.27.
(E) Telephone, electric and other cable services.
(1) Telephone, electric and other cable services shall be placed underground throughout the subdivision, except as follows.
(a) Primary distribution lines (e.g., five to 35 kV power lines) on the perimeter of the subdivision may be aboveground when located on or along a section or quarter section line.
(b) The Township Board, upon recommendation from the Planning Commission, may waive or modify this requirement where it finds that underground utilities would be impractical.
(2) Telephone, electric and other cable services shall also comply with the following requirements.
(a) All such services shall be located in the public road right-of-way or in an private easement, which shall generally be located at the front of each lot.
(b) If located in a public road right-of-way, the location and installation of such services shall be planned so as to not conflict with other utilities.
(c) All such services shall be installed in accordance with standards promulgated by the Michigan Public Services Commission and other agencies having jurisdiction.
(Ord. passed 3-18-1997)