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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: (303) 832-8106 <br />April 18, 2005 <br />Jerry M. Nettleton <br />Environmental Coordinator <br />Twentymile Coal Company <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />Re: Foidel Creek Mine, Permit C-1982-056 <br />Technical Revision 4-45 (TR-45) <br />Technical Adequacy 2 <br />Dear Mr. Nettleton: <br />COLORADO <br />DIVISION O F <br />MINERALS <br />GEOLOGY <br />REC LANATION•NININO <br />SAFETT•S<IENCf <br />Bill Owens <br />Governor <br />Russell George <br />Executive Director <br />Ronald W. Canany <br />Division Director <br />Natural Resource Trustee <br />As we have discussed by telephone, the Division of Minerals and Geology (Division) has <br />identified, with regard to this TR, an item that still requires correction, and a review is to be made <br />of another. Please address the requests presented in the following items. Any revised or added <br />pages to the Permit Application Package (PAP) developed in response to these requests should be <br />submitted with the date of response annotated in the lower right hand corner. (An advance copy <br />of this letter is being transmitted by e-mail.) <br />Item 1. Exhibit 8u. Twentymile Coal Company was to review the proposed Scoria Storage Area <br />alternative sediment control proposal, and to consider an alternate design. Please advise the <br />Division of the status of this review and the potential submittal of an alternative design. <br />Item 2. Exhibit 8u. The SEDCAD demonstration submitted for the Storage and Training Area <br />does not demonstrate that there is no off-site impact from sediment carried in the runoff (the <br />demonstration omitted the sedimentology module). Please resubmit the demonstration to show <br />that the alternative sediment control procedures are adequate. <br />The current due date for a proposed decision on this technical revision is April 22, 2005. Please <br />request an extension of the proposed decision date to allow the Division ten days to review your <br />adequacy response(s). <br />Please call me if you have any questions. <br />Yours truly, <br />w~~ <br />Byro G. Walker <br />Environmental Protection Specialist <br />cc: Dorothy Struble, Routt County Clerk and Recorder, County Clerk, PO Box 773598, Steamboat <br />Springs, CO 80477 (please place on public notice file) <br />Daniel I. Hernandez, Division (e-mail) <br />Office of Office of Colorado <br />Mined Land Reclamation ARive and Inactive Mines Geological Survey <br />