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<br />Peabody <br />Twentymile Coal Company <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />970.879.3800 <br />June 21, 2010 <br />Mr. Jason Musick <br />Environmental Protection Specialist <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />(303) 866-4933 X 8134 <br /> <br />JUN 2 0 x,010 <br />13;vra,011 of ROci son, <br />mining and SaWY <br />RE: Twentymile Coal Company - Foidel Creek Mine (Permit No. C-82-056), Technical Revision <br />(TR10-73) for 19RT Dewatering Installation Adequacy Responses. <br />Dear Mr. Musick: <br />Attached are documents related to adequacy responses for the subject revision. Please contact myself <br />(970) 870-2750 or Jerry Nettleton (970) 870-2712 with any questions. <br />Best regards, <br />Twentymile Coal Company <br />Brian A. Watterson, P.G. <br />Geologist, Environmental Group <br />G:\Environmental\REVISION\TECH-RV\TR10-73 19RT Dewatering System\TR10-73 19RT TA response cover letter.doc