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MOONTAIN COAL <br />~-' ~COMPANYLLC. <br />A Subsidiary of Arch Western Resowces, LLC <br />RECEIVED <br />MAR 18 2005 <br />March 18, 2005 <br />Mr. Jim Burnell <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Division ei MMerels and Geology <br />West Elk Mine <br />POBox 591 <br />5174 Highway 133 <br />Somerset, CO 81434 <br />(970) 929-5015 <br />Fax (970) 929-5595 <br />RE: Mountain Coal Company L.L.C., West Elk Mine; Permit C-80-007, West Flatiron <br />Permit Revision No. 11, (PR-11), Response to the Division's 2"d Adequacy Review of 1 March <br />2005. <br />Dear Mr. Burnell: <br />Mountain Coal Company, L.L.C. (MCC) submits this response to the Division's 2nd adequacy <br />review of 1 March 2005, for the Federal Lease Area of West Flatiron. The Division's comments aze <br />italicized and MCC's responses aze bolded. <br />Rule 2.03.6 (1) <br />1. Response accepted. <br />Rule 2.04.11 <br />2. Please add a statement in Exhibit 67 (Windy Gap Analysis) that speaks to any <br />changes in water depletion (or lack of changes) occurring with the mine expansion. <br />MCC's response: MCC is experiencing net increases of water being discharged to <br />the N. F. of the Gunnison River (see the 2003 AHR) of +306 acre-feet. As more <br />information and data have been obtained (since TR-79, April 1997) regarding the mine <br />water balance, Exhibit 67, completed by others, will need to have a major overhaul <br />because no depletions are being experienced. MCC proposes a complete re-write of <br />Exhibit 67, during permit renewal. <br />New Comment: Even though no additional depletions aze anticipated, this must be stated in <br />the text of Exhibit 67. The original comment stands. <br />MCC's response: MCC has made the statements of no additional depletions in <br />Exhibit 67, (attached). <br />