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Peabody <br />Twantymile Coal Company <br />April 13, 2006 <br />Mr. Byron Walker <br />Environmental Protection Specialist <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />(303) 866-4941 <br />_4 <br />pPR ~ g 2006 <br />pimson nt -ione,a~s ans Gado9'~ <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />970.879.3800 <br />RE: Twentymile Coal Company -Foidel Creek Mine (Permit No. C-82-056),Technical Revision TR <br />OS-51, Permit Boundary Revision, Technical Adequacy (3) Response <br />Dear Mr. Walker: <br />This submittal responds to your March 1, 2006 Technical Adequacy letter, and addresses the surface and <br />ground water monitoring sites and wells within the proposed Permit Boundary Revision area. The <br />following summarizes the current status and disposition of identified surface and ground water monitoring <br />sites and wells within the proposed Permit Boundary Revision area: <br />Desi ation Description Location Status and Di~osition <br />Site 304 Foidel Creek TSNR86WS13NW % Abandoned surface monitoring site, <br />surface site eliminated from monitoring program <br />by TR03-42 and subsequently reclaimed <br />008-AV-1 Foidel Creek TSNR86WS13NEY< Active alluvial monitoring well, <br />alluvial well retain as adjacent area well w/TCC <br />responsible for reclamation, access <br />overland (app. 400') from RCR33 <br />008-AV-Z Foidel Creek TSNR86WS13NE'/a Active alluvial monitoring well, <br />alluvial well retain as adjacent area well w/TCC <br />responsible for reclamation, access <br />overland (app. 400') from RCR33 <br />AVM-1 Middle Creak TSNR86WS13SW'/< Abandoned alluvial monitoring well, <br />alluvial well eliminated from monitoring program <br />by TR03-42 and subsequently reclaimed <br />(TCC to file for bond release) <br />FBR-2 Twentymile SS TSNR86WS 12SW Y Active downgradient monitoring well, <br />bedrock well retain as adjacent area well w/TCC <br />responsible for reclamation, access using <br />existing ranch roads (app. l.6 miles) <br />