07-22-1991 Council Packet - Laserfiche WebLink

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the permit, and allow DNR approval of the permit if the MCWD and/or LMCD fails to act within an established time period. Runoff Management Policies; 6.Minimize the Impacts of non-point pollution on the quality of Lake Minnetonka and its tributaries^ by controlling urban and agricultural stormwater runoff and erosion, and other appropriate management practices. Lead Agency: MCWD Cooperating Agencies: Cities, DNR, CoE, Soil Conservation Service (SCS). County Extension Service (CES), Council The MCWD should take the lead in aggressively managing stormwater runoff within the basin of Lake Minnetonka. It should revise and tighten its proposed runoff standards, which should exceed the regional detention basin standards recommended by the U.S. EPA Nationwide Urban Runoff Program (NURP). On-site or area-wide detention of stormwater runoff should bo required by cities and the MCWD for all new developments or redevelopments, if the stormwater runoff from the site would otherwise be discharged directly to surface water in the basin. Where detention ponds cannot be constructed according to NURP design guidelines because of spatial constraints imposed by the site, smaller in-series ponds or other appropriate controls or Best Management Practices as recommended by the MPCA should be required. Permit requirements for each constructed detention pond should include a Maintenance Plan and provisions for access to perform maintenance. The MCWD's 509 plan and the subsequent, r juired local (city) water management plans should insure that all indirect stormwater runoi. is properly managed and treated i emove silt, phosphorus and other contaminants before oeing discharged into wetlands and surfaces waters within the basin. The MCWD should consider amending its 509 plan consistent with the foregoing, so that its Rule B specify such criteria and apply them to the entire Lake Minnetonka watershed not just shorelandiL The MCWD should work with the Carver Soil and Water Conservation District and the Hennepin Conservation District to identify and control critiv.al non-point sources of pollution Grom agricultural land within the Lake Minnetonka watershed. Standards and regulations may need to be developed to assure proper management of animal manures from generators not covered bj' MPCA regulations. 7. Minimize the uses of fertilizers and pesticides la the Lake Minnetonka watershed. Lead Agency: MCWD Cooperating Agencies: SCS, CES, U of M Agricultural Extension Service, Cities Lakeshore communities should consider placing restrictions on the use of fertilizers (especially 7/11 Draft - 11