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Greg Lewicki And Associates <br />11541 Warrington Coart phone: (303) 346-5196 Fax (303)-346-6934 <br />Parker, CO USA 80138 E-Mail: lewicki7@comcast.net <br />April 3, 2004 RECEIi/ED <br />Kent Gorham ppR p i 2004 <br />Division of Minerals and Geology <br />1313 Sherman Street 2nd Floor Division of Idinerals and Geology <br />Denver, Colorado 80202 <br />Re: Sediment Pond Certification at the Rimrock Mine. <br />Dear Kent: <br />This document is the most recent certification of the sediment pond at the Rimrock <br />Mine. <br />I am a certified professional engineer in the State of Colorado with experience in the <br />Eastern and Western United States in the design, construction and operation of <br />sediment ponds, mine hydrology systems and slope stability of embankments. <br />A site inspection was conducted on April 2, 2004 for the first quarter. It was a mostly <br />cloudy day. The site was totally dry although it looked like it may rain for the first <br />time in weeks. <br />The vole problem noticed in the past inspection seems to be minor with no concern <br />regarding the dam embankment. <br />Sincerely yours, <br />limey ~ <br />Greg Lewicki, P.E. <br />Greg Lewicki and Associates <br />