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Peabody <br />Twentymile Coal Company <br />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) 866-3567 X 8134 <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />970.879.3800 <br />REMM 2010 <br />JUL 2 32010 <br />Division of Reclamation, <br />Wing and Safety <br />RE: Twentymile Coal, LLC - Foidel Creek Mine (Permit No. C-82-056), Technical Revision (TR10-74) <br />Acreage Correction for 18-Left Mine Water Transfer Pipeline <br />Dear Mr. Musick: <br />Twentymile Coal, LLC (TC) requests CDRMS approval of a Technical Revision (TR10-74) to our approved <br />Mining and Reclamation Permit, to correct an erroneous acreage figure for the 18-Left Mine Water Transfer <br />Pipeline, previously approved under TR09-70. <br />Design information for the 18-Left Mine Water Transfer Pipeline (18LT Pipeline) included a disturbance acreage <br />figure of 75.2 acres. This acreage figure was reflected in both the TR Application Form and the associated bond <br />calculation. During preparation of bid documents for installation of the waterline, it was discovered that the <br />disturbed acreage figure used for permitting reflected an inadvertent shift in a decimal point, so that the actual <br />disturbance of 7.52 acres showed as 75.2 acres. This revision corrects this error, and results in a reduction in the <br />calculated bond amount, therefore, TC requests that the CDRMS reduce the bond liability to reflect this change. <br />This submittal includes a corrected revision Application Form, proposed Public Notice, and corrected project bond <br />estimate. We appreciate your consideration and cooperation in facilitating timely review and approval. Once you <br />have had opportunity to review the accompanying information, please feel free to contact me with any questions or <br />to discuss related matters. <br />Best regards, <br />Twentymile Co <br />Jerry . Net on <br />Environm 1 Manager <br />G:\Environmental\REVISION\TECH-RV\TR10-74 18LT Pipeline Acreage Correction\TR10-74 18LT Pipeline Acreage <br />Correction TL.doc