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MEMORANDUM EMMONS To: Dallas Larson & OLIVIER City Administrator _ :ESOP The City of Centerville From: Marcey L. Westrick Subject: EAW for the City of Centerville's Downtowr Date: October 22, 2001 Redevelopment The purpose of this memorandum is to provide comments of concern on behalf of the Rice Creek Watershed District (District) on the Mandatory EAW for the Centerville Downtown Redevelopment. The comments listed below are with reference to the pertinent section in the ® EAW. #10. The approximate proposed wetland impacts of 0.38 acres will be subject to WCA r sequencing and mitigation requirements through the District permitting process. In addition, wetlands before and after construction should at a minimum be equal given WCA requirements. •' #17. As part of the Centerville Lake TMDL, the District has completed a nutrient budget analysis for ® Centerville Lake. In addition, preliminary analysis completed by the District indicates that the proposed District rule will allow the city to redevelop the downtown area while meeting the Centerville TMDL goal. This information has been shared with the City of Centerville, and as a result, the District does not find it necessary for the city to complete a nutrient budget analysis separate from the Districts. With that said, as noted in the EAW, Clearwater Creek is also listed as'an impaired waterbody due to biological impairment and the city should attempt to reduce stormwater volume and rates entering the creek to the maximum extent practicable. r 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 be also noted that Low Impact Development techniques could be used including native landscaping and reduced imperviousness. 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. ® If there are any questions regarding the comments for this review, or if the District can provide additional assistance, please feel free to contact me at (651) 203-6009 or Doug Thomas at (763) 398-3071. c: RCWD Board of Managers 4 RCWD District Office, ATTN: Doug Thomas