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Mountain Coal Company <br />West Elk Mine <br />Post Office Box 591 <br />Somerset, Colorado 81434 <br />Telephone 970.929-5015 <br />October I, 1997 <br />rl r'r `~~~F~ <br />OCT 0 g 1991 <br />y <br />.. •,,..,.,~iu..:....cCC.Cr <br />Mr. Michael Boulay <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br /> <br />RE: Minor Revision No. 224 (Light-Use Road Upgrade); West Elk Mine; <br />Permit No. C-80-007 <br />Dear Mike: <br />iii iiiiiiiiiiiiiii <br />~~ <br />Mountain Coal Company (MCC) has reviewed the adequacy letters received from the <br />Division, dated September 3 and September 10, 1997, regarding the above-referenced minor <br />revision, and provides the following additional information. <br />MCC had previously provided cross-section M-M' as a representative, typical cross- <br />section through the dewatering borehole road (Map S8B and ~9B). A revision of this <br />cross-section would not show the additional 4,000 CY cut for the road upgrade. The <br />volume was computer generated utilizing CAD earthwork sofhvarc and could not be <br />replicated using other methods, even with several cross-sections. In addition, MCC has <br />stated in the application that all material cut (4,000 CY) will be backfilled upon final <br />reclamation. MCC believes that this is a conservative estimate and requests that the <br />bond liability be calculated for backfilling 4,000 CY of material on this section of the <br />upgraded road. <br />In regards to the slope stabilization questions from Jim Pendleton, MCC will install stability <br />survey monuments above the proposed cut slope before excavation commences. MCC will <br />also begin site line stability monitoring following excavation. As committed in Permit <br />Revision No. 7 and as provided in the weekly geotechnical reports, MCC will report, design, <br />permit, and install appropriate slope treatments in a timely fashion. <br />Please call if you have any questions. <br />Kathy Welt <br />mrzz4a.ao~ <br />cc: Eric Mende <br />Chris Nvikos <br />Phil Schmidt <br />