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St. Louis Park City Code <br />Protected Areas <br />§ 26-156 SUBDIVISIONS <br />(2) Mininsun: standards for runoff water management plans. A runoff water management <br />-plan shall include the following`items: <br />a. A map containing a delineation of the sub-watershed contributing runoff from <br />off-site, and proposed and existing sub-watersheds on-site. The delineation <br />shall conform to the nomenclature of the SWMP and shall indicate any <br />signifcant departures from the watershed delineation of the SWMP. <br />b. Delineation of existing on-site wetlands, as defined in the Wetland . <br />Conservation Act, lakes, streams, shoreland, and/or floodplain areas. <br />c. For waterbodies and channels, a listing of normal (run-out) and calculated ten- <br />year and 100-year elevations on-site for both existing and proposed conditions. <br />d. Stormwater runoff volumes and rates for existing and proposed conditions. <br />e. All hydrologic and hydraulic computations completed to design the proposed <br />stormwater management facilities. Reservoir routing procedures and critical <br />duration runoff events shall be used for design of water storage areas and <br />outlets. <br />f. A checklist of best management practices to demonstrate that, to the maximum <br />extent practical, the plan has incorporated the structural and nonstructural best <br />management practices described in the book "Protecting Water Quality in <br />Urban Areas," published by the Minnesota Pollution Control Agency, or the <br />applicable publications. <br />g. A grading plan incorporating overflow routes along streets or drainage <br />easements designed to protect struchtres from damage due to: <br />1. Storms in excess of the design storm; or <br />2. .Clogging, collapse or other failure_of the primary drainage facilities. <br />h. On-site water storage and water quality detention basins are required in <br />accordance with the city's comprehensive water resource management plan. <br />Copies of the calculations determining the design of the basins shall be <br />submitted with the preliminary plat application. The size and design <br />considerations will be dependent on required water quality and quantity, the <br />imperviousness of the development and the degree to which on-site infiltration <br />of runoff is encouraged. Design of on-site detention basins shall incorporate <br />recommendations from the Nationwide Urban Runoff Program (NURP) and <br />"Protecting Water Quality in Urban Areas," published by the Minnesota <br />Pollution Control Agency, or the applicable publications. <br />(Code 1976, § 14-935) <br />Sec. 26-157. Protected areas. <br />(a) Where land proposed for subdivision is deemed environmentally sensitive by the city due <br />to the existence of wetlands, drainageways, watercourses, floodable areas, significant trees, steep <br />slopes or wooded areas, the design of such subdivision shall clearly reflect all necessary measures <br />of protection to ensure against adverse environmental impacts. <br />26:38 St. Louis Park City Code <br />