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' November 14, 2005 <br />Mr. Tim Pike <br />' Platte Sand and Gravel, LLC <br />18311 County Road 23 <br />Milliken, CO 80651 <br />Subject: Geotechnical Design Report for Gravel Pit Lining Project, Platte Sand and <br />Gravel, Weld County, Colorado. Project No. 22238240 <br />Dear Mr. Pike: <br />The enclosed report was prepazed in accordance with the "Design Phase" scope of work that was <br />outlined in our proposal to you dated August 8, 2005. <br />The report documents the field investigation, laboratory testing and seepage modeling analysis that <br />was conducted to confirm the suitability of subsurface conditions at the Shazkey's Lake Gravel Pit <br />for installation of a perimeter soil-bentonite cutoff wall to meet mine dewatering and long term <br />water storage reservoir needs. It also presents our design recommendations, plans, and <br />specifications for construction of the soil-bentonite cutoffwall. <br />Please contact the undersigned if you have any questions or require any further information <br />regarding the design report. We appreciate the opportunity to assist you with this phase of the <br />project and look forwazd to working with you during the construction phase. <br />Sincerely, <br />Enclosure <br />URS Corporation <br />8181 East Tugs Avenue <br />Denver, CO 80237 <br />Tel: 303.694.2770 <br />Fax: 303.694.3946 <br />t~A. Millet, P.E. <br />Sr. Principal and Vice President <br />N:NROJECTS\21238240 PLATTE SAND GRAVEL\SUB BA120 WORD PROCViEPORT COVER LETTER.DOC\14-NOV-0S <br />JWB:jwb <br />