2023-08-07_REVISION - C1982056 - Laserfiche WebLink

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subsidence of Middle Creek. No active nesting sites were identified within the proposed affected area and no Bald eagles were observed in the survey area. The Colorado Division of Wildlife sent a letter to the Colorado Division of Minerals and Geology on January 28, 2000. The Colorado Division of Wildlife (CDOW) determined that the proposed underground expansion associated with PR-05, "should not negatively impact any state listed threatened or endangered species." The proposed affected area encompasses habitat for Columbian sharp-tailed grouse. The CDOW determined that the proposed Foidel Creek Mine operation"should not have any significant impacts to the existing Columbian sharp-tailed grouse habitats in this area." The Office of Surface Mining (OSM)requested a Section 7 Consultation with the U.S. Fish and Wildlife Service (USFWS) on June 9, 2009, with respect to Permit Revision No. 8 (PR8)proposed mine plan. The USFWS provided a response to OSM on July 14, 2009. The USFWS stated that water depletion impacts to four Colorado River endangered fish had previously been addressed in biological opinions GJ-6-CO-95-F- 007 and GJ-6-CO-97-F-014. The USFWS provided concurrence with the proposed mining operation and determined that no further consultation was necessary. XIV. Protection of Underground Mining No specific approvals are granted to the applicant under this section. XV. Subsidence Control The applicant has predicted that no material damage will result from subsidence, other than the possibility of mining in the Western Mining District drying up two springs that have adjudicated water rights, the Gertie No. 1 and Livestock No. 2 springs. Numerous structures exist above previously approved mining areas. The applicant has presented a subsidence control plan to repair or mitigate damage caused by subsidence for each of the existing structures. Details regarding the subsidence control plan may be found in the approved PAP. A brief summary of the subsidence control measures for each structure follows. County Road No. 33 Mining conducted in the Eastern Mining District(EMD) and longwall panel 12 in the Northern Mining District(NMD)undermined portions of Routt County Road No. 33. TC conducted daily monitoring of the road when the longwall panels were approaching and undermining the road. When surface observations found the asphalt road surface had buckled or been damaged due to subsidence, TC temporarily repaired the surface using gravel. Once subsidence monitoring indicated that subsidence had ceased, permanent asphalt overlay or patch was applied to the damaged road section. This method was successfully used during the mining of Longwall panels 9R, 8R, 7R, 6R and 5R in the Eastern Mining District, and Longwall panel 12R in the Northern Mining District. Twentymile Coal re-paved segments of Routt County Road No. 33 in Foidel Creek Mine 32 August 4,2023