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2.0 WELLHEAD PROTECTION AREA AND DRINKING WATER <br />SUPPLY MANAGEMENT AREA <br />The wellhead protection area (WHPA) and drinking water supply management area (DWSMA) <br />delineation analyses were conducted in accordance with Minnesota Department of Health’s wellhead <br />protection rules. As a result, the following criteria were considered in making the delineation <br />analysis: 1) theaquifer’s hydraulic conductivity, 2) the groundwater flow direction, 3) the average <br />daily pumping rate from each of the existing wells, 4) hydrogeologic boundaries, and 5) time of travel. <br />Each of these criteria were factored into the development of a groundwater flow model that was <br />ultimately used to conduct the delineation analysis. The results of this analysis (i.e., the WHPA and <br />DWSMA) are presented in Figure 1 for the City’swells. Additional details on the delineation analysis <br />is presented in City of CentervilleWellhead Protection Plan, Part 1 (Amendment), prepared by <br />Stantec (December 2018). See Appendix H.The delineation was approved by the MDH in January <br />2019. <br /> <br />8 <br />193803358 <br />Stantec Consulting Services, Inc. <br /> <br />