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Peabody REucryEO <br />Dear Mr. Musick: <br />Twentymile Coal <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 So 7 <br />Division of Reclamation, <br />Mining and safe>x/ <br />29515 Routt County Road 27 <br />Oak Creek, CO 80467 <br />970.879.3800 <br />August 15, 2011 <br />RE: Twentymile Coal Company - Foidel Creek Mine (Permit No. C -82 -056), Minor Revision <br />(MR11 -255) — Facilities Storage Yard Rock -Dust Tank <br />&( 1!' ' <br />Twentymile Coal, LLC (TC) requests CDRMS approval of a Minor Revision to our existing approved <br />Permit for installation, operation, and reclamation of an additional rock -dust tank in the Facilities <br />Storage Yard, adjacent to our Office /Bathhouse Facilities. The additional rock -dust tank will be <br />utilized to fill bulk dust bags, to be transported underground, by mobile equipment to facilitate rock - <br />dusting of our active mine workings. The rock -dust tank to be used is an existing tank that has been <br />transferred for re -use from our Moffat County Mining, LLC - Williams Fork Mine. <br />The proposed rock -dust tank installation is within the existing Facilities Storage Yard disturbance area, <br />and will involve no new or incremental disturbance. The Facilities Storage Yard Rock -Dust Tank <br />Installation will consist of the re -used rock -dust tank, which will be mounted on four poured concrete <br />piers; required electrical and control equipment, that will tie -in to existing distribution lines; and a dust <br />collection system. The additional rock -dust tank installation can be readily accessed from either the <br />adjacent Shop Access Road or the open Facilities Storage Yard area. <br />Drainage for the proposed Facilities Storage Yard Rock -Dust Tank and the existing Facilities Storage <br />Yard area is controlled by existing collection ditches which drain to Pond F, and the proposed <br />installation will not modify the drainage configuration or requirements. The Facilities Storage Yard <br />Rock -Dust Tank will remain in -place until it is no longer needed to support ongoing or anticipated <br />future mining operations. Reclamation of this installation will probably occur as part of the overall <br />reclamation of the Mine Facilities area, with equipment removal, foundation demolition, backfilling <br />and grading, soil material replacement, and reseeding. Bond monies are already in place for all <br />reclamation components except removal of the rock -dust tank and demolition of the foundation piers. <br />This submittal includes revised PAP text, exhibits; and maps, addressing the location, configuration, <br />operation, maintenance, and reclamation of the proposed additional rock -dust tank. New and revised <br />PAP materials are identified by the attached Summary of Revisions /Additions. <br />