2010-06-04_GENERAL DOCUMENTS - C1982056

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The 18-Right facilities are located on the eastern flank of the Northern Mining District workings in Sections 10 and 11, T5N, R86W. The 18-Right facilities consist of a borehole, heater, and hoist building, MAC borehole and monitoring equipment (portable trailers), cuttings pit, and propane tank. The access road to this site connects to the Fish Creek Tipple facilities area. The 18-Left facilities were constructed in 2009. These facilities consist of a ventilation shaft borehole, and escape shaft, MAC borehole, transformer pad, topsoil stockpile, cuttings pit, and sediment pond. Structures for the escape shaft, ventilation fan, and MAC monitoring will be removed from other areas of the mine where they are no longer needed, and reconstructed at the 18-Left site. The 18-Left facility will support the mine workings in the proposed Western Mining District. Physiographic Setting The permit area varies in elevation from 6,600' to 7,500' with the portal openings at 6,885' along Foidel Creek. Generally, the topography consists of gently rolling hills, dip slopes and cliff outcrops. Flatter topography is evident in the valleys of the major streams draining the area (Fish Creek and Foidel Creek), as well as along the gentle dip slopes. Prominent cliffs have formed where massive sandstone units outcrop. Geologic Setting The rock units of Twentymile Park Basin which dip 5° - 30° toward the central portion of the basin are of local significance. Normal faulting has been identified throughout the permit area, striking generally northwest to southeast, with displacement of zero to 85 feet. A reverse fault running in an arcuate line northward through the west central part of the basin shows displacement of 0 to 80 feet. Smaller lateral faults were encountered in the 9 Right and 10 Right gateroads while driving development out into the Eastern Mining District. The near surface bedrock units are composed of sedimentary rocks of marine and non-marine origin. These sedimentary rocks were formed through the transgression and regression of an epicontinental sea and are comprised of sequences of sandstones, siltstones, shales and coal. Four geologic formations exist in the vicinity of the Eastern Mining District. They are, in ascending order, the Mancos Shale, the Iles and Williams Fork Formation of the Mesaverde Group, and the Lewis Shale. These strata were all deposited during the late Cretaceous Period. Generally, the strata dip to the center of the basin. Coal Seam Stratigraphy Three economically important coal seams, the Lennox, Wadge, and Wolf Creek coals, are located within the locally important Middle Coal Group of the Williams Fork Formation. At this time, the Wadge coal seam is the only seam being mined in the Foidel Creek underground mine. The Wadge Coal seam was strip mined in CYCC's adjacent Energy Mine No. 1, energy Mine No. 2, and Eckman Park Mines (No. C-81-071) and Energy Mine No. 3 (C-84-062). The Wadge coal seam, in the area of the Foidel Creek Mine, is separated from the underlying Trout Creek sandstone by about 250 feet of interbedded sandstones, siltstones, shales and coals. Foidel Creek Mine 8 June 4, 2010