2007-11-28 CC Packet - Laserfiche WebLink

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Response: The project must and will comply with City, MPCA, and RCWD requirements. The City believes the strategies planned for incorporation into the redevelopment project will ensure that the quality of Clearwater Creek will not worsen due to the proposed project. The City can encourage the developer to go beyond the adopted City, MPCA, and RCWD requirements but it does not have the authority to require it. 2. Comment Summary: Several stormwater management strategies are listed such as rain gardens, depressed parking lot islands, pervious pavement with underground storage, and pretreatment and infiltration basins. It should also be noted that Low Impact Development techniques could be used including native landscaping and reduced imperviousness. Response: Comment acknowledged. The RCWD suggestions will be considered as the project design moves forward. It is likely that additional techniques such as native plantings and re-use of captured stormwater runoff, will be incorporated into the project. 3. Comment Summary: The District appreciates the open communication with the City of Centerville regarding the Centerville lake TMDl and sees the Centerville Redevelopment as an opportunity to improve the quality of stormwater that is discharging to both the lake and Clearwater Creek. The District looks forward to assisting the city as this project goes forward to ensure that District Rules and TMDL goals are met. Response: The City will continue to work with the RCWD to ensure that the project complies with District requirements. 4. Comment Summary: The document states that stormwater management features for the site will be designed to meet the Rice Creek Watershed Districts (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 facilities for runoff where they will function most efficiently and in harmony with the existing natural features. (Jim larsen, 651-602-1159) Response: City staff along with their consulting engineer (Bonestroo) met with RCWD staff in September of 2007 to discuss the proposed downtown redevelopment and potential options for stormwater features to meet the RCWD requirements. Since this meeting the City has been in ongoing contact with the RCWD as more detailed design progresses on the first phases of the project. This is proposed to continue through the length of the project. 5. Comment Summary: The Minnesota Department 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 groundwater 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) Centerville Downtown Redevelopment Page 7