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Saz7me - 2.05.3 Surface disturbance associated with degazsification activities is limited to light-use • roads utilized to access the well sites and graded pad areaz utilized for drilling activities and installation of surface degazsification equipment. Well sites have been selected to min;mi>r new surface disturbance, where possible. Well sites can normally be accessed using existing unimproved powerline access or exploration roads. Minor road improvemenu such az grading and widening in certain areas may be necessary to provide for drill and equipment access dependent on existing road conditions. In addition, dependent on survey results, the actual drill site may be beyond the limiu of existing roads, requiring road extensions of up to 800 feet. To the extent feasible, borehole sites are located so chat access roads can provide access for one or more degazsification installations. Well pad areas are typically a maximum of 100' x 100'. If multiple wells are drilled from the same pad, the dimensions of the pad will be larger, but typically will be less disturbance than the sum of the individual pad dimensions. Site development involves the minor road improvemenu noted above, establishment of temporary upslope drainage diversion (if necessary to carry runoff around the pad area, site clearing, removal and windrowing of topsoil (or sortable soil material) in stockpiles or a berm on the perimeter of the pad area, grading of the pad area, and excavation of temporary mud piu for containment of drilling fluids during drilling activities. Wells will be drilled to a depth of up to 2,500 feet below the ground surface to intercept the mine workings. A conventional truck-mounted rotary drill rig is typically utilized to drill the well using rotary air, foam, and/or wet (mud) drilling methods to advance and maintain the physical integrity of the well. The wells have been and will be Gazed with conventional grouted steel casing for the entire length except for the portion of the borehole extending from approximately 200-feet above and into the mine workings, which is cased with perforated steel Gazing to max;m;>r gas extraction. • Gas extraction is achieved by connecting askid-mounted vacuum pump(s) to the well that creates a negative pressure, drawing methane and other gases from the mine workings to and through the well(s). The vacuum pump ugas-powered, utilizing the methane extracted through the well az the primary fuel source and propane az the start-up fuel source for initial well pressurization. Any excess methane not utilized to fuel the degasification pump is vented or in the future maybe flared-off or used in a small power generator. The degasification installations will continue to be operated so long az needed to prevent or min;m;>P methane in the mine and/or seepage of methane from the sealed mine workings into active mine areas. The degazsification installations are inspected on a periodic bazis and the associated light-use road and operating equipment are maintained as necessary to assure continued effective operation. When the degassificacion installations are no longer required, surface facilities and equipment will be removed and associated surface disturbance areas will be reclaimed az described in the reclamation pLw section. It should, however, be noted that the light-use roads utilized to access the borehole sites, may incorporate existing unimproved public roads and maybe retained. Elk Creek Mine Facilities -See the General Facilities Map, (Map 2.05-M1), and the Facilities Detail Maps, (Map series 2.05-M3x). A. Elk Creek Canyon Haul Road, Access Road, and Light Use Road -The Elk Creek Canyon road is a pre-law road extending from the maim haul road up Elk Creek Can}nn. F,xpansian of the F]k Creek coal sty ~+lr cut-tdf dimct acrrss to the ]ewer portion of the Elk Creek Canyon road. Access was reestablished via the West Valley haul road and a short segment of light-use road extending from the Cemetery up the west side of Elk PR04 2.05-20 Revised May 2001