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• Kennecott Enerav: Class III Cultural Resource Inventory for the Colowyo Mine 2004-2005 Collom Drilling Program, Moffat County. Colorado, Metcalf Archaeological Consultants, Inc., 7uly 2004 All areas for drilling have had an archaeological survey. No further work will be required in the drilling areas. VI. Description of Methods to be used to Conduct Coal Exploration and Reclamation. 1. Exploration Methods and Types of Equipment The primary exploration method will be rotary and/or core drilling. On most sites, both a pilot hole and an offset core hole will be drilled on the same drill site location. All pilot holes will be logged utilizing geophysical down hole logging methods. Equipment to be utilized will include truck mounted rotary drill rigs, water trucks to supply drilling water, a small sized bulldozer (D4, D6, or D7 class) to construct and reclaim drill locations and access roads, and a backhoe or dozer to construct mud pits for drilling fluids where necessary, and various light duty vehicles to transport personnel and supplies. 2. Road and Drill Hole Location Construction Access to the drill sites will be primarily via existing ranch and hunting roads. Road construction to drill sites that cannot be accessed via existing roads will only require clearing brush with no or minimal topsoil removal. Should access road construction be required on side slopes and rugged terrain requiring cut and fill construction, operations will be conducted in a manner that protects both the topsoil resource and the hydrologic balance Only if necessary, topsoil will be removed and stockpiled or windrowed adjacent to the access road under construction for later use during reclamation activities. Where there is potential for erosion and resulting sedimentation, water bars will be included during road construction. Newly constructed creek crossings should not be required, but should existing stream crossings be deemed inadequate, the crossings will be upgraded as necessary to minimize hydrologic impacts and provide safe access. Drill hole location sites will be about 50 ft. x 100 ft. (0.115 acres per site) to accommodate drilling and support equipment. Attempts will be made to adjust locations to minimize the disturbance at each site. For instance, sites along steeper slopes will be longer and narrower, taking advantage of space created along the access road. Also, where possible, the access road and/or site(s) will be moved or N:\CCC ENGWAN\DMG\NOI bOC\07NOA07 N01 rext.doc lOR6/06