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Sec 117.384 -410 <br />Revised July 29, 2014 to include 2013 Construction Stormwater Permit, 2013 MS4 Permit <br />requirements and 2012 LRRWMO Third Generation Plan [ate, additions] <br />financial contribution calculations will become part of the permanent project record <br />retained by the City. <br />(Code 1978, § 9.27.11; Ord. No. 06 -32, § 1, 11 -28 -2006) <br />Sec. 117 -393. - M Design Standards <br />Minimal impact design standards shall be followed to achieve the best stormwater <br />management. The BMPs used should seek to mimic the natural hydrology, utilize pervious <br />areas for stormwater treatment and to infiltrate stormwater runoff from driveways, <br />sidewalks, rooftops, parking lots, and landscaped areas to the maximum extent practical to <br />provide treatment for both water quality and quantity. The Minnesota Stormwater Manual <br />(Stormwater Steering Committee, MN Pollution Control Agency), the Minnesota Urban <br />Small Sites BMP Manual (Metropolitan Council), Local Road Research Board BMP <br />Maintenance Guide, and Protecting Water Quality in Urban Areas (MPCA) are resources <br />that provide guidance in achieving these goals. <br />(1) rain gardens <br />(2) preen roofs <br />(3) bio- retention practices <br />(4) pervious pavements or pavers <br />(5) plots of native vegetation and /or buffers in place of sod <br />(6) reforestation and revegetation <br />(7) trees and tree box filters <br />(8) reduction of impervious area <br />(9) rain water harvesting <br />(a) Implementation. Low Impact Development or Better Site Design techniques are <br />the preferred methods of achieving stormwater management. Mimicking the natural <br />topography and land cover as they exist in the pre - developed condition to meet the <br />standards and requirements of the City and other regulatory agencies shall be the first <br />consideration. <br />(b) Recommended practices. Practices and methods used to achieve the intent of <br />the above paragraph shall include, but not be limited to, the following: <br />(c) Other practices. Other traditional stormwater BMPs may be approved on a site <br />by site basis to achieve the goals of water quality and quantity, and rate control. These <br />practices shall conform to the standards outlined in the resources referenced above. <br />(d) All stormwater runoff shall be pre- treated prior to discharge to any surface water. <br />(e) Maintenance plan. A plan shall be established to maintain all temporary and <br />permanent BMPs in a working and efficient condition. This may include removal of <br />invasive species, sediment, debris, or any other foreign or obstructive object or condition <br />that prevents the BMPs from performing as designed. <br />Ramsey, Minnesota, Code of Ordinances Page 10 <br />