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Sec 117.384-410 <br />Revised June 5, 2014 to include 2013 Construction Stormwater Permit, 2013 MS4 Permit <br />requirements and 2012 LRRWMO Third Generation Plan [deletion;,, additions] <br />(h) The stormwater controls for new development sites shall also provide no net increase <br />in stormwater discharaes of Total Suspended Solids (TSS) and Total Phosphorus <br />(TP). <br />The stormwater controls for redevelopment proiects shall achieve a net reduction from <br />pre-proiect conditions (on an annual average basis) of: <br />(i) <br />(i) <br />(1) Stormwater Discharge Volume <br />(2) Stormwater Discharges of TSS <br />(3) Stormwater Discharaes of TP <br />The City will evaluate requests for a variance to the volume reduction Goals when site <br />conditions preclude infiltration. The developer shall implement to the maximum extent <br />practicable other volume reduction techniques on site. The Lower Rum River <br />Watershed Management Oraanization has adopted procedures for making a financial <br />contribution when volume reduction Goals cannot be met. The variance approval and <br />financial contribution calculations will become part of the permanent proiect record <br />retained by the City. <br />(Code 1978, § 9.27.11; Ord. No. 06-32, § 1, 11-28-2006) <br />Sec. 117-393. - "" R Design Standards f^r stormwater wet detention facili+ies <br />Minimal impact desian standards shall be followed to achieve the best stormwater <br />management. The BMPs used should seek to mimic the natural hvdroloav, 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 Aaencv). 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 />(a) Implementation. Low Impact Development or Better Site Design techniques are <br />the preferred methods of achieving stormwater management. Mimickina the natural <br />topoaraphv and land cover as they exist in the pre -developed condition to meet the <br />standards and requirements of the City and other reaulatory 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 followina: <br />(1) rain Gardens <br />(2) areen 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 reveaetation <br />(7) trees and tree box filters <br />(8) reduction of impervious area <br />Ramsey, Minnesota, Code of Ordinances Page 9 <br />