Agenda - Planning Commission - 02/02/2006

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wetlands for wastewater treatment according to 7050.0130; subpart F are no_.~t "waters of the state." Wet Detention Facility - A permanent man-made structure for the temporary storage of runoff that contains a permanent pool of water. Wetlands - As defined in Minnesota Rules 7050.0130, subpart F, "... "wetlands" are those areas that are inundated or saturated by surface water or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas. Constructed wetlands designed for wastewater treatment are not waters of the state. Wetlands must have the following attributes: A.) A predominance ofhydric soils; B.) Inundated or saturated by surface water or groundwater at a frequency and duration sufficient to support a prevalence of hydrophytic vegetation typically adapted for life in a saturated soil condition; and C.) Under normal circumstances support a prevalence of such vegetation. The National Wetla~'ds Inventory Maps distributed by the U.S. Department of the Interior Fish and Wildlife Service and Maps of Protected Waters distributed by the Minnesota Department of Natural Resources are incorporated by reference in this definition. The wetland inventory performed by the City of Ramsey as part of the Wetland buffer Ordinance is also incorporated by reference. Field delineation and a report are required prior to any construction. 9.27.04 Storm Water Pollution Control Plan. Every applicant for a building permit, subdivision approval, or a permit to allow land disturbing activities must submit a storm water pollution control plan (SWPPP) to the city engineer. No building permit, subdivision approval, or permit to allow land disturbing activities shall be issued until the city approves this plan. At a minimum these pollution abatement control practices must conform to those in the current version of the Minnesota Pollution Control Agency's publication, "Protecting Water Quality in Urban Areas." Single Family and Multi-family units under 12 per building may follow the SWPPP prepared for the development. This will require an agreement between the builder and the developer. A copy of the agreement must be submitted with the building permit application. 9.27.05 General Policy on Storm Water Runoff Rates. For rivers and streams storm water discharge rates must not increase over the predevelopment ten (10) year and one hundred (100) year peak storm discharge rates, based on the last ten (10) years of how that land was used. Also accelerated channel erosion must not occur as a result of the proposed activity. For wetlands volume control is generally more important. Draft StormWater Ordinance Page 6 of 20 January 20, 2006