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2020-09-09 CC Packet
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2020-09-09 CC Packet
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CHAPTER ONE <br />DATA ELEMENTS and ASSESSMENT (4720.5200) <br /> PART 1. REQUIRED DATA ELEMENTS <br />This section contains required data elements that were outlined in the Scoping Decision <br />Notice provided to Centerville by the MDH. Appendix E contains a table assessing the data <br />elements required for this plan. Below is a summary of each data element. <br />A.Physical Environment Data Elements <br />Geology, soils, and water resources data elements are provided in City of Centerville Wellhead <br />Protection Plan, Part 1 (MDH, 2001). <br />The below table represents updated precipitation data from the Centerville area in inches, as <br />calculated by the Minnesota Climatology Working Group’s online gridded precipitation database. <br />The database correlates available surrounding precipitation data points to determine approximate <br />precipitation values in the area of interest. <br /> Centerville Precipitation (inches), Minnesota Climatology Gridded Database <br />YearJanFebMar Apr May Jun Jul Aug Sep Oct Nov Dec Total <br />20170.870.700.593.365.983.592.825.501.484.830.620.8432.12 <br />20160.340.922.003.032.234.804.768.376.862.922.351.9642.41 <br />20150.390.360.532.006.464.617.563.784.973.294.051.7634.62 <br />20141.431.360.866.904.7310.552.144.542.621.291.511.1641.09 <br />20130.621.312.184.684.756.682.820.681.383.760.731.4729.18 <br />20120.661.611.402.489.873.454.930.980.581.450.971.6627.89 <br />2011 0.86 1.242.353.045.133.767.174.510.710.970.240.7235.43 <br />20100.560.720.871.482.724.914.283.995.251.492.252.9234.06 <br />20090.441.121.201.540.403.482.556.830.546.570.482.2322.84 <br />20080.110.521.703.743.813.552.942.562.431.751.331.6628.69 <br />Avg0.600.991.373.234.614.944.204.172.682.831.451.6432.83 <br />Average annual precipitation over the 10-year period from 2008 to 2017 was 32.8 inches, which <br />is close to the 1981-2010 mean of 32.3 inches for the area. Precipitation is accounted for as <br />recharge in the Twin Cities Metropolitan Area Regional Groundwater Flow Model Version 3.00 <br />(Metropolitan Council, 2014). <br />B.Land Use Data Elements <br />1.Land use – Land use was generally not considered for the Part 1 wellhead protection <br />activities. Land use will be covered in greater detail in the updated Part 2 plan, where <br />the role of land use on water quality will be closely reviewed. <br />2.Public utility services – The only public utilities that play a role in the Part 1 Wellhead <br />Protection Plan are the municipal water supply wells in Centerville and other nearby <br />public water supply wells for surrounding communities that utilize the same aquifers. <br />Table 2 shows the modeled rates of the wells operated by Centerville. All high capacity <br />wells in the DNR SWUDs database were already included in the MODFLOW model. <br />However, all permitted high capacity wells within two miles of the Centerville wells <br />5 <br /> <br />
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