2018-10-04_REVISION - C1982056 - Laserfiche WebLink

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Peabod RECEIVED 1111 ENERGY OCT 0 4 2018 Twentymile Coal, LLC DIVISION OF RECLAMATION,29515 Routt County Road 27 MINING AND SAFETY oak Creek,Co 80467 970.879.3800 Ms. Tabetha Lynch, Environmental Protection Specialist October 3, 2018 Colorado Division of Reclamation, Mining, and Safety 1313 Sherman Street, Room 215 Denver, Colorado 80203 (303) 866-3567 Ext, 8147 RE: Twentymile Coal, LLC, Foidel Creek Mine (C-82-056)—Technical Revision (TR18-92) 7E Panel Extension Dear Ms. Lynch: Twentymile Coal, LLC (TC) respectfully requests CDRMS approval of a Technical Revision to our existing approved Permit, to modify our approved mine plan for the Wolf Creek Reserve (WCR) to extend the 7-East Longwall Panel approximately 1,400 feet. The panel extension to the east, will also require modification of the Permit Area boundary to encompass the extension area, associated coal leases, and potential related subsidence areas, adding approximately 40 acres to the Mine Permit Area. Mining limits were initially established for the eastern edge of the WCR based on available information on coal structure in this area. Subsequent mining and previous surface drilling have resulted in better definition of structural constraints. This additional information indicates that longwall panels can safely be extended further to the east, increasing the minable coal reserves, extending mine life, and resulting in extraction of additional coal which otherwise would never be recovered. Activities under the proposed mine plan modification will be limited to underground continuous-miner development and longwall mining, and will not require construction of any new surface facilities. Preliminary mine development and subsequent production development and mining for the WCR have been addressed by MRI 4-282, TRI 4-83, PRI 4-10, and PRI 5-11, all of which involved review of the planned activities, any associated impacts, and related protection and mitigation measures. This Technical Revision submittal tiers off of the previous permit approvals, and includes an adjustment in the approved Permit boundary to add an addition 40 acres to the Permit Area to encompass the planned panel extension and any associate subsidence impacts. This submittal includes revised PAP text and supporting materials, as identified by the attached Summary of Revisions/Additions. Please note that since this Permit Revision application only addresses underground development and mining, and will involve no surface disturbance, there are no associated impacts on reclamation liability, and no bonding calculations are being submitted with this application package. We appreciate your consideration, cooperation, and assistance in facilitating timely review and approval of this revision application. After you have opportunity to review the accompanying information, please feel free to contact me with any questions or to discuss submittal materials or related matters.