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V <br />Preface: <br />This publication presents guidelines recommended under current concepts for managing <br />storm water and snowmelt runoff when it is necessary to use wetland areas for these <br />purposes. The Urban Stormwater Advisory Group (USWAG) acknowledges that <br />wetlands are often affected by storm water management decisions and wetland responses <br />to changes in storm water flows can be highly complex and can affect other waters, such <br />as lakes and streams. The implications of these concepts must be understood before they <br />can be properly implemented. <br />Comprehensive plans for Local. Government Units, including cities, counties, and <br />Watershed Management Organizations, should address the management of the effects of <br />urban storm water anal snowmelt runoff on wetlands and associated water courses and <br />basins. These guidelines should be considered whenever there are storm water discharges <br />to natural water courses and basins, including wetlands, so as to minimize any adverse <br />impacts to the diverse biological systems by reducing chemical and physical degradation <br />to water uses, aquatic habitats, and the level of water quality necessary to sustain such <br />uses. <br />These guidelines are intended to assist managers in designing a process that minimizes <br />wetland impacts. The guidance does not take the place of any criteria administered by <br />local, state, and federal. agencies. The project must meet any requirements of the state <br />Environmental Policy Act (M.S. 116D) and the state Environmental Rights Act <br />(M.S. 116B) and comply with all permits issued by any unit of government. The permits <br />include, but are not limited to, approvals for water retention from impervious surfaces <br />(M.S. 103B.3365), the state Wetland Conservation Act of 1991 (M.S. 103G) issued by <br />Local Government Units, the Protected Waters Permits (M.S. 103G.245) by the <br />Minnesota Department of Natural Resources, the Section 404 of the Clean Water Act <br />permits by the U.S. Army Corps of Engineers, and Section 401 certifications under the <br />Clean Water Act by the Minnesota Pollution Control Agency. <br />,,~ <br />