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10/26/07 09:58 FAX 651 602 1674 METRO COUNCIL x{003 Page Two Dallas Larson October 23, 2007 i Metropolitan Council staff review iof the EAW finds that it is complete and accurate with respect to other regional concerns and offers the following comments for consideration as the project is implemented: Item 12—1 1hysical Impacts on Water Resources(Jim Larsen, 651-602-1159) The project proposes to eliminate the only wetland within the proposed 37-acre redevelopment area and to excavate the depression for use as a stormwater treatment basin. Eliminati¢n of significant wetlands during the redevelopment process is contrary to Council Policies that promote protection of such water resources. Council policies recommend utilization of best wetland management practices d at result in maintenance and improvement of water quality,control of runoffrate;;and volumes to reduce erosion and flooding, and preservation of the designated beneficial uses of such natural basins. This wetland area should be avoided and proposed stormwater detention and treatment f acilities should be accommodated elsewhere on or off of the immediate site. The ongoing CSAH14 reconstruction project in the City already resulted in elimination.of several acres of wetland in the City. Since Clearwater Creek is impaired for fish and invertebrate according to the index of biotic integrity(IBI), further wetland losses in the City could incrementally worsen the Creek's IBI. ® Item 17— l Vater Quality:Surface Water Runoff The docum ent states that sformwater management features for the site will be designed tc,meet the Rice Creek Watershed District's(RCWD)proposed new rules,dated June 13,2007. The City and site developers should meet with the RCWD staff as soon as possible to site both infiltration and surface detention and treatment f acilities for runoff where they will function most efficiently and in harmony with the existing natural features. (Jim Larsen, 651-602-1159) Also,the Minnesota Depatltment of Health designates the bedrock sensitivity to contamination in Centerville as "high",based on the geologic character of the ® aquifers in the area. Land use,therefore,has a significant chance of impacting groundwati;r quality. Storm water infiltration projects should follow guidelines put forth by the Minnesota Department of Health in 2006 for Evaluating Proposed Storm Water Infiltration Projects in Vulnerable Wellhead Protection Areas. (Sara Bertelsen, 651-602-1035) f