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publication, "Storm -Water and Wetlands: Planning and Evaluation Guidelines for Addressing <br />Potential Impacts of Urban Storm -Water and Snow -Melt Runoff on Wetlands" for guidance. <br />Subdivision 2. Wetlands must not be drained or filled, wholly or partially, unless <br />replaced by either restoring or creating wetland areas of at least equal public value. <br />Compensating for the impact by replacing or providing substitute wetland resources or <br />environments with those of at least equal public value. Compensation, including the <br />replacement ratio and quality of replacement should be consistent with the requirements <br />outlined in the rules adopted by the Board of Water and Soil Resources to implement the <br />Wetland Conservation Act of 1991 including any and all amendments to it. <br />Subdivision 3. Work in and around wetlands must be guided by the following principles <br />in descending order of priority: <br />A. Avoid both the direct and indirect impact of the activity that may destroy or <br />diminish the wetland. <br />B. Minimize the impact by limiting the degree or magnitude of the wetland <br />related activity and its implementation. <br />C. Rectify the impact by repairing, rehabilitating, or restoring the affected <br />wetland environment with one of at least equal public value. <br />D. Reduce or eliminate the adverse impact over time by preservation and <br />maintenance operations during the life of the activity. <br />9.27.14 Vegetated Buffer Protection for Rivers, Streams and Wetlands. <br />The city has established a wetland buffer ordinance specifying minimum setbacks from wetlands <br />in the city. Setbacks are also established for the rivers that border the city and the lakes internal <br />to the city. <br />A. Detailed buffer design is usually site specific. Therefore the city engineer <br />can require a larger buffer than the minimum. <br />B. For newly constructed buffer sites the design criteria should follow common <br />principles and the example of nearby natural areas. The site should be <br />examined for existing buffer zones and mimic the slope structure and <br />vegetation as much as possible. <br />C. Buffer design and protection during construction should do any or all of the <br />following: <br />1.) slow water runoff, trap sediment, enhance water infiltration, trap <br />fertilizers, pesticides, pathogens, heavy metals, trap blowing snow and <br />soil, and act as corridors for wildlife. <br />Page 15 of 21 Storm Water Pollution Control Ordinance <br />November 8, 2006 <br />