2013-10-08_REVISION - C1982056 (22)

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building, 6MN million gallon water tank, 6MN sediment pond, 6MN reservoir, ventilation fan, fan heaters (4), and propane tank. The 6MN facilities provide support to underground workings in the Northern Mining District. The 18-Right facilities area is located on the eastern flank of the Northern Mining District workings in Sections 10 and 11, T5N, R86W. The 18-Right facilities consisted 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-Right facilities area has been demolished and the area has been backfilled, regarded and revegetated. This area has received Phase I release in 2013 with the approval of SL-01. 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 Foidel Creek Mining Districts. 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. 8 Foidel Creek MineOctober 8, 2013