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PQabody Twentymlle Coal Company 29515 Routt County Road #27 Oak Creek, CO 80467 970.879.3800 Mrs. Janet Binns RECEIVED October 19, 2007 Environmental Protection Specialist OCT 2 2 2001 Colorado Division of Minerals and Geology RECENED 1313 Sherman Street, Room 215 Division of Reclamation, Mining and safety OCR 2 2 200j Denver, Colorado 80203 (303) 866-4933 Division of keaar~;ation, Mining and Safety RE: Twentymile Coal Company - Foidel Creek Mine (Permit No. C-82-056), Minor Revision (MR07-224) for 6MN Mine Water Transfer Pipeline Dear Mrs. Binns: Twentymile Coal Company (TCC) requests CDRMS approval of a Minor Revision (MR07-224) to the approved Permit, for a Mine Water Transfer Pipeline at the 6-Main North (6MN) facilities location. The proposed pipeline is included as one of the components of the previously submitted Technical Revision application (TR07-61) for the 6MN Mine Water Storage Reservoir, however, unanticipated permitting delays relating to permitting of the reservoir through the Colorado Division of Water Resources -Dam Safety Division, and urgent operational needs force us to take this interim step to meet our ongoing mine operational water requirements. Water from the 10-Right Mine Dewatering Well, which pumps accumulated mine inflows from a sump in the sealed Eastern Mining District, is pumped to the surface by a 320 HP high-capacity submersible pump, at a rate of approximately 700 gpm. The pump dischazge is currently transferred by a series of surface and undergound pipelines to the Area 1 Pit in the TCC Mine Facilities Area for use in either coal prepazation operations or for storage and subsequent use as a back-up source for the operational mine water system. As part of the 6MN Facilities project, TCC will establish a new pipeline running approximately 7,750 feet from the 10-Right Dewatering pipeline to the existing 6MN Million-Gallon Tank. The pipeline will be constructed of 10-inch HDPE pipe, buried to a depth of approximately six feet, with one sub-grade crossing (bored under) of Fish Creek. In conjunction with this crossing, TCC requests approval of a waiver to the stream buffer zone protection requirements (Rule 4.05.18) for temporary pipeline construction disturbance within the buffer zone. The proposed temporary pipeline construction disturbance will not cause or contribute to violation of applicable water quality standazds; adversely affect water quality or quantity, and will not involve any temporary diversion activities. Because the crossing of Fish Creek will be below grade, with no surface disturbance of the stream channel or any associated wetlands, a U.S. Anny Corps of Engineers (USAGE) Permit is not required. As a courtesy, however, a copy of the prior Technical Revision submittal (TR07- 61)was provided to the Grand Junction Office of USAGE (Nathan Green). G:~Environmental~REVISION~MINOR-RV~MR07-224 61vIN Interim Pipeline~MR07-224 61vIN Interim Pipeline TL.doc