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Greg Lewicki And Associates <br />1154] Warrington Court <br />Parker, CO USA 50138 <br />Phone (303) 346-5196 Fax: (303)-346-6934 <br />E-M a i I: l ew i c k i 7@ a t t b i. c o m <br />RECEIVED <br />APR 0 3 2003 <br />April 2, 2003 <br />Division of Minerals and Geology <br />Erica Crosby <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street <br />Denver CO 80202 <br />RE: Adequacy response for Fetcher/Vale Pit Elam Construction <br />VVl -2ooz - ~ t~ : Tv~i l l~jncLivl~ <br />Dear Erica: <br />After discussion with you, Jim Dillie and Steve Kaspar of Elam, we feel that the best <br />thing to do regarding the slope stability issue is to bond for potential loss of topsoil <br />from a failure of a portion of the slope at the site, although we firmly believe that this <br />is extremely unlikely. <br />The calculations of additional bond are given below: <br />Assumptions: 30 feet maximum width of topsoil pile at bottom, 2H:1V slope, 7.5 feet <br />high, maximum length of slope failure is 140 feet. Also assume that all topsoil in the <br />140 feet is mixed and lost for reclamation. <br />Volume of topsoil needed to import to replace the mixed soil = 7.5' x 15' x 140' _ <br />15750 cubic feet or 583 cy. Assuming a cost of $10 per cy for import soil, the <br />increased bond is $5830 + add on overhead (18.5%) _ $6908. <br />Sincerely, <br />Greg Lewicki, P. E. <br />Greg Lewicki and Associates <br />cc: Steve Kaspar Elam Construction, Inc. <br />