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Peabod <br />1111 ENERGY <br />Twentymile Coal, LLC <br />Mr. Jason Musick, Environmental Protection Specialist <br />Division of Reclamation, Mining, and Safety <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />(303) 866 -3567 X 8134 <br />AUG 00 zoi1 <br />Diyi.,: „„.:, r<eciamation, <br />Mining and Safely <br />29515 Routt County Road 27 <br />Oak Creek, CO 80467 <br />970.879.3800 <br />July 27, 2011 <br />RE: Twentymile Coal, LLC - Foidel Creek Mine (Permit No. C -82 -056), Technical Revision (TR11 -77) <br />—15 -Left Ventilation Shaft <br />Dear Mr. Musick: <br />Twentymile Coal, LLC (TC) requests CDRMS approval of a Technical Revision to our existing approved <br />Permit for installation, operation, and reclamation of a new bleeder shaft and rock -dust installation, to be located <br />over an extension from the 15 -Left Mains (15LT). The bleeder shaft would serve as an additional source for <br />intake air to the Mine, and the additional rock -dust installation would provide the ability to transfer rock -dust <br />into the underground workings at a location close to the active operations in the WMD. The proposed facilities <br />would be accessed from the existing all- weather road to the Fish Creek Water Treatment Facility. The rock -dust <br />tank will be transferred for re -use from the Moffat County Mining, LLC - Williams Fork Mines. <br />The proposed bleeder shaft and rock -dust tank installation will require upgrading of a short segment <br />(approximately 750 ft.) of an existing ranch and powerline access road from the existing Fish Creek Water <br />Treatment Facility Road, and construction of a new facilities pad (approximately 200 x 350 ft.). The 15LT <br />Ventilation Shaft installation will consist of the upgraded light -use road and facilities pad; adjacent soil material <br />stockpiles, a reinforced concrete shaft pad, the lined and grouted borehole extending into the active mine <br />workings; a lined cuttings pit, the re -used rock -dust tank, which will be mounted on four poured concrete piers; <br />a connecting powerline and required electrical and control equipment, that will tie -in to the existing Fish Creek <br />Substation (Primary Substation 3); and a dust - collection system. <br />A culvert will be installed on the light -use road where it crosses a small existing natural drainage. Drainage <br />from upgradient areas will be intercepted and routed around the facilities pad by short perimeter ditches on the <br />south and east sides of the pad. Drainage from the small facilities pad will be controlled under a Small -Area <br />Exemption. The 15LT Ventilation Shaft installation will remain in -place until it is no longer needed to support <br />ongoing or anticipated future mining operations. Reclamation of this installation will involve equipment <br />removal, foundation demolition, backfilling and grading, soil material replacement, and reseeding. <br />sed PAP text, exhibits; and maps, addressing the location, configuration, operation, <br />- f the proposed Ventilation Shaft installation. New and revised PAP materials <br />�mary of Revisions /Additions. We would like to proceed with this project as <br />favorable conditions during the 2011 construction season. We, therefore, <br />and assistance in facilitating timely review and approval of this <br />rtunity to review the accompanying information, please feel free to <br />°bmittal materials or related matters. <br />