2018-05-02_REVISION - C1982056 (2)

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Peabod till ENERGY Twentymile Coal, LLC 29515 Routt County Road 27 Oak Creek. CO 80467 970.879 3800 Tabetha Lynch, Environmental Protection Specialist May 2, 2018 Division of Reclamation, Mining, and Safety 1313 Sherman Street, Room 215 Denver, Colorado 80203 (303) 866-3567 X 8147 RE: Twentymile Coal, LLC - Foidel Creek Mine (Permit No. C-82-056), Minor Revision (MR18-309) Cold Storage Shed Dear Ms. Lynch: Twentymile Coal, LLC (TC) requests CDRMS approval of a Minor Revision to our existing approved Permit for installation, use, and reclamation of a cold storage shed at the location of the former "Surveyor's Trailer". The modular building, known as the "Surveyor's Trailer" had deteriorated to the point where it was no longer functional, and it was subsequently vacated and demolished. TC plans to replace the "Surveyor's Trailer" with a Cold Storage Shed for storage of bagged and bulk materials. The Cold Storage Shed will allow some higher usage volume materials that are currently stored in storage sheds to the west of the Main Diesel Fueling Station to be stored in the new location, reducing loading and unloading activities in this high -traffic area. The Cold Storage Shed will sit on concrete piers, will be approximately 150' long x 50' wide x 20115' high, and will be a modular steel structure, open to the west. Since the Cold Storage Shed will be constructed in the same location as the previous "Surveyor's Trailer", there will be no new surface disturbance, and drainage from this area will be addressed by the existing drainage and sediment control systems. Consistent with TC's standard operating practices, no potentially hazardous materials will be stored in this outside storage area. This submittal includes revised PAP text (pg 2.05-19), addressing the location, configuration, operation, maintenance, and reclamation of the proposed Cold Storage Shed and a bond estimate. Please note that while the Cold Storage Shed (100' x 50' x 11`20') is slightly larger than the previous "Surveyor's Trailer" (80' x 40' x 10'), it is a less complex structure (3 -sided and no interior walls), and in reality would probably be disassembled for re -use rather than demolished. The accompanying bond estimate reflects these considerations, with a lower cubic -foot cost for the shed structure. The bond estimate includes a deduction for the "Surveyor's Trailer" based on the 06116 Bond Reclamation Cost Estimate (Task 190 Demolition, Warehouse Complex Environmental Trailer). We would like to proceed with this project as soon as possible, to support our ongoing mining activities. We, therefore, 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. Best regards, Jerry . Ne n Manager ronmental Affairs cc: Ed Brady/TC