2020-09-09 CC Packet - Laserfiche WebLink

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1.0 INTRODUCTION Wellhead protection isa means of safeguarding public water supply wells by preventing contaminants from entering the area that contributes water to the well or wellfield over a period of time. This program is now required in Minnesota since the Minnesota Department of Health (MDH) implemented its Wellhead Protection Rules in November 1997. The MDH initiated its Wellhead Protection Program in response to the 1986 Amendments to the Safe Drinking Water Act and MDH’s statutory authority is granted in the Minnesota Groundwater Protection Act of 1989. The City of Centerville originally completed its Wellhead Protection Plan in 2007. The City is required to complete an amendment of the Plan to cover the next ten years.Centerville completedits Part 1Wellhead Protection Plan amendment in December 2018 (which was approved by the MDHin January 2019). The Part 1 Plandelineated the capture zones for the City’s wells and determined the vulnerability of the aquifers that supply these wells.This report is the amended Part 2 Wellhead Protection Plan that inventories potential sources of contamination, identifies problems and opportunities for managing these contamination sources, and develops a management plan to mitigate risks of groundwater contamination. The City of Centervillecurrently operates one primaryproduction wellfor municipal water supply purposes, with a second well available as an emergency backup.Bothwells are within City limits. The primary well iscompleted in the Prairie duChien Aquifer, while the emergency backup well is completed in the deeper Jordan Aquifer. A detailed description of the geologic and hydrogeologic setting of Centerville’swater supply system is presented in City of CentervilleWellhead Protection Plan Part 1 (Amendment). See Appendix H. The rest of this report is used to summarize the wellhead protection area delineation analysis, the vulnerability assessment, and to present the contents of the wellhead protection plan. 7 193803358 Stantec Consulting Services, Inc.