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� „ . <br /> FNYIRONMENTAL JUNE, 1980 <br /> 15. EROSION CONTROL PLANS AND PROGRAMS WILL BE REQUIRED IN ALL LAND <br /> ALTERATION PROJECTS. Each contractor will be required to mininize <br /> the probability of soil erosion on site and/or siltation damage <br /> downstream. The smallest amount of bare ground shall be exposed <br /> for as short a time as possible . Temporary ground cover will be <br /> required until permanent cover is provided. Sediment traps will be <br /> required on slopes and between construction aites and public roadways . <br /> Fill must be compacted and stabilized for permanence . <br /> �1RBAN AREA POLICIES FOR NATLtRA� RESOURCE MANA�EMENT <br /> 1. LAI`1D USE STANDARDS WILL LIMIT THE IMPACT OF URBAN ENCROACHMENT ON <br /> LAKE MINNETONKA. Minimum lot widths will space out docks and <br /> structural encroachments while increasing areas of natural vegetation. <br /> Lake use regulations will limit the number of boats per property and <br /> the amount of public waters available for private docking and boat <br /> storage . <br /> ` 2. Rc.TENTION OF NATURAL VEGETATION WILL LIMIT THE IMPACT OF URBANIZATION <br /> U AS VISIBLE FROM THE LAKE. Building heights will be limited to less <br /> than the typical tree height . Minimum green belts will be provided <br /> with prohibitions against clearcutting or excessive thinning of <br /> vegetation . Natural vegetation will be preserved on slopes . Retaining <br /> walls will be discouraged except when absolutely necessary to prevent <br /> erosion , in which case they will be screened with natural vegetation. <br /> 3. DIRECT RUNOFF INTO THE LAKE WILL BE MINIMIZED. Standards will be <br /> established and maintained to limit the amount of impervious hardcover <br /> in proportion to closeness of the shoreline . Maximum hardcover wi11 <br /> be limited to 30$ of each parcel within 1 , 000 feet of the shoreline <br /> . . pursuant to Mn. DNR recommended shoreline practices . � <br /> 4 . ALL EXISTING URBAN j+TETLANDS WILL BE MAINTAINED AND PROTECTED FOR <br /> SURFACE WATER RETENTION AND FILTR.ATION. The existing urban runoff <br /> exceeds the capacity of the urban marshes to assimilate all nutrients , <br /> therefore additional pollution hazards would be created if any wetlands <br /> would be lost. Additional steps to improve nutrient assimilation <br /> include on-site retention on all new developments and storm water <br /> recycling through the existing marshes . <br /> 5 . CITY MAINTENANCE PRACTICES WILL BE DESIGNED TO IMPROVE STORM WATER <br /> QUALITY. Salt use for winter street treatment will be minimized. <br /> Snow removal practices will locate temporary storage sites where they <br /> will not overload the natural drainage system or where foreign matter , <br /> especially salt , will not directly enter a marsh or lake . Spring <br /> cleanup will promptly remove road sands and salts before� environmental <br /> damage occurs . <br /> CMP 3-22 <br />