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Savage and Savage Environmental <br />practical solutions for environmental issues <br />4610 Haystack Drive 970 674 8080 telephone <br />Windsor, Colorado 80550 970 674 8088 facsimile <br />savageandsavage Mearthlink.net <br />RECEIVED <br />JUL 0 02010 <br />July 8, 2010 Division of Reclamation, <br />Mining and Safety <br />Rob Zuber, Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining & Safety <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />Re: Phase II Bond Release (SL-05), Keenesburg Mine (CDRMS file C-1981-028) <br />Revision of LS Factor for Native Transect C-C' <br />Dear Rob: <br />Based on our meeting July 6, and review of the information you provided, I have revised <br />the LS factor for the Keenesburg sedimentology demonstration for the C-C' transect to <br />reflect the 0.240 value you suggested. Attached is the revised Table 1, page 3 <br />incorporating that . factor value. The "revision lowers the predicted level of sediment <br />generated from the native areas to 0.077 tons/acre/year, with the predicted sediment <br />generation from the reclaimed areas remaining the same at 0.020 tons/acre/year. <br />Please contact me if you have any further questions. Thanks for your assistance. <br />Sincerely, <br />"6z;m? <br />Michael S. Savage <br />Principal <br />Enclosures: revised Sedimentology Table <br />C: Don MacDonald, Coors Energy Company-.