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prehistoric site (5RT345) is a rock art site located on the outcrop of the Twentymile Sandstone <br /> directly north of the main mine facility area. Mining approved under PR-02 (Southwest Mining <br /> District)undermined and subsided 5RT345. Stipulation No. 33 was attached to the PR-02 <br /> approval and Twentymile Coal Company took appropriate measures, as determined by the <br /> United States Bureau of Land Management(BLM), prior to undermining this site. Mitigation <br /> measures required by the BLM involved extensive research and documentation of this site. The <br /> site has since been destroyed by subsidence and subsequent rockfall. <br /> During the review of PR-10, two cultural resource sites were identified (5RT3324 and <br /> 5RT3325) and are recommended to be eligible for inclusion on the National Register of Historic <br /> Places NRNP). These sites should not be disturbed by surface operations but they will be <br /> subsided. Based on an analysis submitted by a consultant hired by TC, and the predicted effects <br /> of subsidence, these sites should not be adversely affected by the mining activity proposed with <br /> PR-10. History Colorado concurred with this based on a letter dated November 24, 2015 that <br /> they submitted to the Division received on December 1, 2015. <br /> Land Uses <br /> Pre-mining and post-mining land uses within the permit area are pastureland and rangeland. Some <br /> of the surface was previously disturbed by surface mining methods under Mine No. 1, Mine No. <br /> 2, and Eckman Park Mine (C-1981-071) and Energy Mine No. 3 (C-1984-062), and by facilities <br /> previously permitted under the permit for the Fish Creek Tipple (C-1981-036). <br /> Description of the Mine Operation and Reclamation Plan <br /> Sizes of Permit Area, Disturbed Area, and Production Volumes <br /> The permit area covers approximately 22,607 acres. Cumulative actual surface disturbance, as <br /> reported in the permittee's 2021 Annual Reclamation Report, is 798.8 acres. The portion of the <br /> mine to be permitted under the current application at full production is projected to produce <br /> approximately 6,000,000 to 11,000,000 tons of run-of-mine coal per year dependent on mining <br /> conditions. <br /> Mining Method <br /> The Foidel Creek Mine was originally permitted as an underground operation employing room <br /> and pillar mining on privately owned coal within a 924 acre permit area. TCC referred to the <br /> original permit as a pilot project designed to evaluate the technical and economic feasibility of <br /> underground mining operations on the Wadge coal seam, which was previously surface mined in <br /> the portal area and on dip slopes to the south and southwest by TCC's sister company, Colorado <br /> Yampa Coal Company (CYCC). Existing surface disturbance along Foidel Creek at the main <br /> mine facility area consists of portals, surface support facilities, an office, low-quality coal <br /> stockpiles, a processing waste pile, conveyors, a tipple and batch weigh loadout facility, a ROM <br /> coal stockpile, two rock dust tanks, an explosives magazine, a rail spur, and sediment control <br /> ditches and ponds. A large portion of the current main facility area was once within a disturbed <br /> area called the Area 2 pit within the CYCC permit No. C-1981-071. Since the completion of <br /> Foidel Creek Mine 12 August 4,2023 <br />