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October 12, 2007 <br />Mr. James R. Stark <br />Environmental Protection Specialist <br />Colorado Division of Minerals and Geology <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RECEIVED <br />OCT 2 3 2007 <br />Division of Reclamation, <br />Mining and Safety <br />rP <br />nNA <br />RE: Technical Revision No. 68, Borrow Site Sediment Control Plan, Colowyo Coal Mine, Permit <br />No. C-81-019. <br />Dear Mr. Stark, <br />Enclosed please find three copies of materials provided for Technical Revision No. 89 in response to your <br />review comments. You will note that we have also slightly increased the size of the proposed borrow area <br />from 1.1 acres to 1.5 acres to ensure adequacy of materials. This change required that the second SEDCAD <br />model run be revised. <br />Attached is a comment/response sheet addressing each item. If you have any questions or just require <br />additional information, please feel free to contact me at (970) 824-1532. <br />Sincerely, <br />Tony T yson <br />Environmental Engineer <br />Encl. 3 copies <br />Cc: file CF 1.1.2.57 2007 w\encl