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III IIIIIIIIIIIII III <br />STATE OF COLC~i~ni~v <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: 1303) 866-3561 <br />FAX: (3031 BJ2~8I06 <br />Ms. Christine Johnston <br />Mountain Coal Company LLC <br />P.O. Box 591 <br />Somerset CO 81434 <br />Re: West Elk MR 268 (Power Pole Stabilization) <br />Deaz Ms. Johnston: <br />January 6, 2000 <br />The Division has reviewed the proposal to retain the gunnite and concrete pad proposed to <br />stabilize the power poles. We believe that the proposed installation should accomplish the <br />required stabilization with minimal disturbance. <br />DIVISION OF <br />MINERALS <br />GEOLOGY <br />RECLAMATION <br />MININ G•SAFETY <br />Bill Owens <br />Governor <br />Greg E. Walther <br />Eaecwive Director <br />Michael B. LOng <br />Division Director <br />However, we would expect the gunnite and concrete pad to deteriorate witlLexposure to the <br />elements. In the future the azea may well fail once the integrity of the pad is compromised. <br />Further, if revegetation is to occur, the pad will have to be covered with sufficient subsoil and <br />topsoil to provide a stable growth medium) At a minimum, MCC should provide a stability <br />analysis to demonstrate that the minimum required reclaimed slope stability safety~factor of 1.3 <br />will be achieved after the slab fails. In completing this analysis the slab should be considered as <br />a dead weight applied as a surchazge to the existing subgrade, only. This should provide an <br />appropriate comparison for reclamation cost without demolition of the "stif3'ened" soil block. <br />If you have any further questions, please feel free to call. <br />Sincerely, <br />a ~~2~2~ <br />Jim Burnell <br />Environmental Protection Specialist <br />