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-2' I--(/-‘� Z 5 , ' c)7 "Z__,-, Li. l' IA <br /> GZA �A t J-) 14 I <br /> I{ngineers and <br /> �4.� r- <br /> GcoEnvironmental, Inc. scientist -r*'; .� <br /> February 28, 1997 ' I <br /> File No. 150154 <br /> FH Raemisch&Sons, Inc. ,, , — 3 in <br /> 308 Raemisch Road <br /> Waunakee, WI 53597 <br /> v.PiA1VG � <br /> Attention: Frank Raemisch '�NN1OPERTY$RECOENT <br /> Subject: Crystal Lake Sand and Gravel Pit <br /> on Crystal Lake Water Level Evaluation <br /> Dane County, Wisconsin <br /> Dear Mr. Raemisch: <br /> GZA GeoEnvironmental, Inc. (GZA) is pleased to provide an evaluation of the anticipated effects of <br /> the proposed expansion to the west of the mining operation at the Crystal Lake Pit located in <br /> Roxbury Township, Dane County, Wisconsin. GZA understands that past sand and gravel mining <br /> operations have all taken place above the water table and-the present elevation of Crystal Lake. The <br /> N4140 DuPlainville Road base of the current pit is at the approximate elevation of the town road on the east side of the pit <br /> Pewaukee,Wisconsin which is several feet above the elevation of Crystal Lake. The planned expansion will extend the pit <br /> 53072 an additional 10 acres to the west of the current pit boundary, and the base of mining operations will <br /> 414-691-2662 remain at the same elevation as the base of the current pit. <br /> FAX 414-691-9279 <br /> In order to lower the elevation of Crystal Lake, the water budget (water gains and losses) for the <br /> lake has to be affected. Water gains to the lake can be made through direct precipitation, surface <br /> water inflows or groundwater inflows. As the operation does not involve the pumping of water and <br /> has very little or no influence on the surface water drainage to the lake, no change is expected to the <br /> inflows to the lake. Water losses from the lake can be made through evaporation, surface water <br /> outflows and groundwater outflows. As the current and planned operation will not cause surface <br /> water outflows from the lake and will not involve the pumping of groundwater, no change will <br /> occur in the outflows from the lake. <br /> In GZA's opinion, the water level in Crystal Lake is controlled by the water levels in the local <br /> groundwater system, and as the extraction operation will not involved the pumping of surface water <br /> or groundwater, no measurable changes will occur in the water budget or water level of Crystal <br /> Lake. <br /> GZA appreciates the opportunity to provide our professional evaluation to FH Raemisch & Sons, <br /> Inc. If you have any questions of require additional information, please call me at(414) 691-2662. <br /> Very truly yours, <br /> A Subsidiary of GZA <br /> GeoEnvironmental GZA GeoEnvironmental, Inc. <br /> Technologies,Inc. <br /> Bernard G. Fe eon, .G. <br /> Senior Projec Manager <br /> Geophysicist <br /> c:\wp51\bgf\rpc\15015405 <br /> c: Kristine Schutte- Zoning Inspector <br /> John Appleyard <br /> Clint Weninger- Payne&Dolan, Inc. <br /> Copyright° 1997 GZA GeoEnvironmental, Inc. <br /> An Equal Opportunity Employer MIEN/H <br />