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Ehvironnietital Consultatits, Inc. <br />November 17, 2005 <br />Mr. Henry Barbe <br />Mountain Coal Company LLC <br />5174 Highway 133 <br />P. O. Box 591 <br />Somerset, CO 81434 <br />Re: West Elk Mine MDW 20-04105 Mud-Pit Design. <br />Dear Henry: <br />Per your request, Greystone Environmental Consultants (Greystone) has completed its <br />design of the Methane Drainage Well (MDW) 20-04/05 at the West Elk Mine. Attached, <br />please find: <br />1. Figure C1 - Mud pit assumptions and final detailed design, and <br />2. SEDCAD 4.0 run for the'/< acre well pad for a 25-year, 24-hour storm event. <br />Should you desire a more formal report, please let us know and we would be happy to <br />assemble one. Please do not hesitate to call me at 303-850-0930 should you have <br />questions or need additional information. <br />Sincerely, <br /> <br />P. Brandon Evans <br />Project Engineer <br />Greystone <br />an ARCADIS company <br />5231 South Quebec Street • Greenwood Village, Colorado 80111 <br />Tel 303.850.0930 • Fax 303.721.9298 <br />www.greystone.us - www.arcadis-us.com