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Greg Lewicki And Associates <br />11541 Warrington Court Phone: (303)346-5196 Fax (303)-346-6934 <br />Parker, CO USA 50138 E-Mail: lewicki7@comcast.net <br />~EC~f r/ED <br />January 6, 2004 ,JqN ~ ~ 2~4 <br />Kent GOrham ~'v~~~en ci Minerals and Ceolopv <br />Division of Minerals and Geology <br />1313 Sherman Street 2nd Floor - <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 December 29, 2003 for the fourth quarter. It was a <br />mostly sunny day. The site was mostly dry although some snow was present on the <br />north slopes of the pond. Engleville Gulch was dry. <br />Small voles or moles were digging holes in the pond dam near the spillway. It is not a <br />signifcant problem at this time, but I will continue to monitor the situation and will <br />report on this item in future inspections. The staff gage in the pond was also knocked <br />over (probably by cattle). I fixed the gage on site. Significant grazing has also <br />occurred throughout the reclaimed area. <br />Sincerely yours, <br />lry ~,~9, <br />Greg Lewicki, P.E. <br />Greg Lewicki and Associates <br />