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Descri~on of the Environment Location of Permit Area The Trapper Mine is located in Moffat County, Colorado on lands within: Township 5 North, Range 90 West Portions of Sections 5 and 6 Township 5 North, Range 91 West Portions of Sections 1, 4, and 5 All of Sections 2 and 3 Township 6 North, Range 90 West Portions of Sections 30 and 32 All of Section 31 Township 6 North, Range 91 West Portions of Sections 21, 25, 26, 27, 28, 29, and 32 All of Sections 33, 34, 35, and 36. ~h~+siographic Setting The Trapper Mine extends across the northern slope of the Williams Fork Mountains between elevations of 6,500 fr.. and 7,800 fr. The crest of the Williams Fork bfouritains forms a long ridge extending east-west at elevations between 7,400 and 7,800 ft. The Yampa River flows generally from east to west a short distance north of the permit azea. The Williams Fork River skirts the south side of the mine site and flows into the Yampa River one mile west of the mine. Geologic Setting The bedrock at the ground surface in the Trapper permit azea is an interbe3ded sequence of sandstones, siltstones, shales, and coals that aze part of the Cretaceous age: Williams Fork Formation. The Williams Fork Formation is part of the regionally extensive Mesa Verde Group. The Williams Fork Formation crops out along asix-mile wide belt that extends along the entire length of the Williams Fork Mountains. Younger unconsolidated alluvial deposits of Quaternary age form a thin mantle on top of the Williams Fork Formation in stream drainages in the permit azea and surrounding azeas. The alluvium is thickest in the Yampa and Vb'illiams Fork River valleys. Structurally, the mine is situated on the south limb of the northwest plunging Big Bottom syncline. Major faults extend across the region, but none have been found in the permit area. Trapper Mine 8 May 13, 1998