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HEPWORTH - PAWLAK GEOTEC• CAL, INC. <br />December 11, 1997 <br />Roaring Fork Resources <br />Attn: Dick Stephenson <br />P.O. Box 1220 <br />Carbondale, Colorado 81623 lob No. 197 682 <br />Subject: Report Transmittal, Geotechnical Stability Study, Proposed Schmidt <br />Property Gravel Pit, Highway 6 & 24, East of Gypsum, Eagle County, <br />Colorado <br />Dear Mr. Stephenson: <br />As requested, we have conducted a study of the geologic and subsurface conditions at <br />the subject site. <br />Geologic conditions which could make the project infeasible were not encountered. <br />The potential affects of sinkholes and erosion should be considered during the mining <br />operation. Subsurface conditions encountered in the exploratory borings drilled <br />throughout the proposed mining area consist of 'fz to 8'/z feet of topsoil, clay and si{ty <br />sand overlying dense gravel terrace deposits. Groundwater was not encountered in the <br />borings to the drilled depths of 3'/z to 15'/z feet. <br />The proposed final pit wall slopes of 2: I (horizontal to vertical) or flatter should have <br />adequate stability provided they are drained and protected against erosion. The <br />Stremme and Gates Ditch will probably need to be piped through Phases 4, 5 and 6 so <br />that leakage does not potentially affect long term slope stability. <br />The report which follows describes our exploration, summarizes our findings, and <br />presents our conclusions and recommendations. We should provide additional <br />consultation as needed during the mining operation to review and monitor the <br />implementation of the geotechnical recommendations. <br />If you have any questions regazding this report, please contact us. <br />Sincerely, <br />HEPWORTH - PAWLAK GEOTECHN[CAL, INC. <br />~i~'~L" _ ""_ <br />Steven L. Pawlak, P.E. <br />Rev. By: RGM <br />SLP/ksm <br />