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/j <br />Elk River <br />Municipal Utilities <br />13069 Orono Parkway • P.O. Box 430 <br />Elk River, MN 55330-0430 <br />September 4, 2007 <br />To: Elk River Municipal Utilities Commission <br />Jerry Takle <br />Jerry Gumphrey <br />Jim Tralle <br />From: Bryan Adams <br />Subject: Elk River Geology <br />Phone: 763.441.2020 <br />Fax: 763.441.8099 <br />On August 16, 2007 Dave Berg and I attended a DNR sponsored meeting concerning water <br />quality and quantity issues in the northwest suburbs. The main purpose of meeting was to <br />promote the shared use (and construction cost) of a proposed surface water treatment plant in <br />Ramsey, Mn. DNR wants the City of Ramsey to use a Mississippi River source treatment plant <br />in lieu of Mt. Simon Hinkley aquifer wells. The DNR is allowing Elk River to utilize the Mt. <br />Simon Hinkley aquifer because of our pro-active conservation record and being outside the <br />seven county metro area. <br />During this meeting, they discussed the aquifers in our area. Attached are the following maps of <br />our area. <br />1) Map #I is an aerial map of the northwest suburbs. <br />2) Map #2 is the same area as in the above map with the glacial drift removed to the first <br />layer of bedrock exposed. Note the valleys in the bedrock where the gravel mines are <br />located in Maple Grove and Elk River. Also note the original Mississippi River bed <br />was much farther south. <br />3) Map #3 reflects the extent of the Mt. Simon aquifer in our area along with the other <br />aquifers in the metro area. The reason the DNR wants us to construct a Mt. Simon <br />observation well is because we are on the outer edge, and if the level drops, we will <br />be one of the first to see the change and most impacted. <br />4) Map #4 is a section showing the different rock formation in the metro area. <br />