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Peabody <br />Twentymile Coal Company <br />29515 Routt County Road #27 <br />Oak Creek, CO 80467 <br />970.879.3800 <br />Mr. 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 X1834 <br />ROCIRVED <br />AUG 13 [u iu <br />DWWon of R aclaAlmillon, <br />Wing and Sak*y <br />August 9, 2010 <br />RE: Twentymile Coal, LLC - Foidel Creek Mine (Permit No. C-82-056), Minor Revision (MR10- <br />245) for Security Installation Drainage <br />Dear Mr. Musick: <br />Twentymile Coal, LLC (TC) requests CDRMS approval of a Minor Revision (MR10-245) to the <br />approved Permit, for drainage modifications to the Security Installation previously permitted as MR09- <br />240 and MR10-244. The proposed modifications involve installation of a grated collection basin on the <br />south side of the Security Building and a 36-inch culvert extending under the Mine Access Road to <br />connect with existing ditch G-2. The limited drainage from this small area was previously collected and <br />routed to either Pond G by Ditch G-1d (the majority of the drainage), or Pond D by Ditch D-4. <br />Because the Security Installation, and proposed drainage modifications will be located within an existing <br />disturbance area, there will be no new disturbance associated with the project. Associated reclamation <br />requirements and costs will be limited to removal of the drainage collection basin and culvert as <br />summarized by the accompanying Reclamation Cost Estimate.. Backfilling and grading, soil <br />replacement, and revegetation, are already addressed for this area by the previously approved revisions for <br />the Mine Access Road (MR03-184), Parking Area (MR07-220), and Security Installation (MR09-240). <br />This submittal includes revised PAP text and supporting materials, as identified by the attached Summary <br />of Revisions/Additions, and a project bond estimate. TCC would like to proceed with this project as soon <br />as possible, therefore we appreciate your consideration and cooperation in facilitating timely review and <br />approval. Once you have had opportunity to review the accompanying information, please feel free to <br />contact me with any questions or to discuss related matters. <br />Best regards, <br />Twentymil a C pany <br />Jerry . Ne ton <br />Environm al Manager <br />cc: Mike Berdine/TCC <br />Jerry Nettleton/TCC <br />G:\Environmental\REVISIONXMINOR-RV\MRIO-245 Security Installation Drainage\MR10-245 Security Installation <br />Drainage Mods TL.doc