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MOUNTAIN COAL <br />IIICOMPANVL.L.C. <br />A Subsidiary of Arch Western Resources. LLC <br />4. Borehole diameters for the reclamation cost estimate (2.05.4(2)(b)); <br />West Elk Mine <br />P.O. Box 591 <br />5174 Highway 133 <br />Somerset, CO 81434 <br />(970) 929-5015 <br />Fax(970)929-5595 <br />*An auger will be used to drill a 10" diameter hole an average depth of 20' in soil materials and <br />a rock bit will be used to drill a 4" diameter hole an additional 10' into bedrock, resulting in a <br />total depth of approximately 30' per borehole. <br />A plan for backfilling, soil stabilizing, compacting and grading, with post-mining contour <br />maps and appropriate cross-sections that are typical and representative of the anticipated <br />character of the final surface configuration of the reclaimed drilling area and road <br />(2.05.4(2)(c)); <br />* As in response #3 above, for reclamation of any necessary accesses or pads constructed (only <br />four proposed sites may require pad or road preparation), the soils that were removed and <br />stockpiled in a berm along the accesses and/or pads will be returned and compacted to the <br />approximate original contours as shown on the attached topographical map. Topsoil salvage <br />from the sites will be redistributed to as evenly as possible over the recountoured pads and <br />accesses. The soil surface will be scarified, if need be, and seeded with MCC's approved seed <br />mixture per Table 37 of MCC's approved permit document. <br />6. A plan for revegetation of the proposed disturbances that meets the requirements of 4.15 <br />(2.05.4(2)(e)); <br />* See response #3 and 5 above. <br />7. A description of the proposed post-mining land use for the proposed disturbances, and whether <br />the proposed post-mining land use is different from the pre-mining land use (2.05.5(2)); <br />* As stated in the original MR 354 application, these soils and geotechnical boreholes will be <br />used to obtain data for use in designing a future coal refuse pile in this location. As a result, the <br />post mining land use may be a future designed rock fill, and if not will continue to serve as <br />wildlife habitat. <br />8. A description of whether the areas proposed for new light use road and the geotechnical drilling <br />will require clearance by the State Historic Preservation Officer (2.04.4);