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Peabod <br />1111 ENERGY <br />Mr. Jason Musick, Environmental Protection Specialist in <br />Colorado Division of Reclamation, Mining, and Safety Division 01 1=CeG' <br />1313 Sherman Street, Room 215 tvFfning ervd Wet/ <br />Denver, Colorado 80203 <br />(303) 866 -3567 X8134 <br />Dear Mr. Musick: <br />Twentymile Coal, LLC <br />0 8 2011 <br />29515 Routt County Road 27 <br />Oak Creek, CO 80467 <br />970.879.3800 <br />July 5, 2011 <br />RE: Twentymile Coal, LLC - Foidel Creek Mine (Permit No. C -82 -056), Minor Revision (MR11 -254) — <br />Overland Conveyor Geotechnical Investigations <br />Twentymile Coal, LLC (TC) respectfully requests CDRMS approval of a Minor Revision (MR11 -254) to our <br />existing approved Permit to address site geotechnical investigations required to support evaluation, design, and <br />possible future construction, operation, maintenance, and reclamation of an overland conveyor which would <br />transfer coal from the Sage Creek Mine to the Twentymile coal handling facilities.. The site geotechnical <br />investigations are required to provide foundation and soils information for evaluation and design of support <br />structures for the proposed overland conveyor. It should be noted that two separate MR applications are being <br />submitted for the planned geotechnical investigations, one for the TC Permit, and one for the Sage Creek Coal <br />Company (SCCC) Permit, each addressing the portion of the proposed conveyor that falls within their respective <br />permit areas. <br />As a result of conceptual design evaluations, a 25 -foot wide conveyor corridor has been defined, extending from <br />the Sage Creek portal area to the Twentymile coal handling facilities. As proposed, the overland conveyor, and <br />a light -use construction and maintenance service road would fall within this corridor. Site geotechnical <br />investigations for the proposed overland conveyor will involve completion of 35 to 40 shallow (10 -30 foot deep) <br />geotechnical test holes along the length of the corridor. An all- terrain drill rig will be used to complete 4 -inch <br />hollow -stem auger sample holes to characterize foundation materials, assess depth to bedrock and groundwater <br />conditions, and to collect material samples for lab testing. All auger -holes will be backfilled with cuttings and <br />leveled, on completion of drilling and sampling. <br />This submittal includes revised PAP text, exhibits; and maps, addressing the location, nature, configuration, and <br />associated reclamation of areas affected by the proposed geotechnical investigations. New and. revised PAP <br />materials are identified by the attached Summary of Revisions /Additions. We would like to proceed with this <br />work as soon as possible, and therefore, appreciate your consideration and cooperation in facilitating timely <br />review and approval of this revision application. After you have opportunity to review the accompanying <br />information, please feel free to contact me with any questions or to discuss submittal materials or related <br />matters. <br />Best regards, <br />Twent <br />Jerry <br />Environ <br />on <br />Manager <br />cc: Scott Cowman/SCCC <br />