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~ Y <br />999 <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Depan menl of Natural Resources <br />1313 Sherman Si., Room 215 <br />Denver, Colorado 80203 <br />Phone (3031 866-3567 <br />FA%:(303)832-8106 <br />November 1, 1994 <br />Ms. Kathleen Welt <br />Mountain Coal Company <br />P.O. Box 591 <br />Somerset, CO 81434 <br />approve the application for a technical revision to construct a <br />development waste pile adjacent to the Lone Pine fan facilities. <br />Enclosed is the decision form for Technical Revision No. 73. <br />Notice of the proposed decision will be published as soon as <br />possible. The publication will initiate the ten day public comment <br />period for the Division's decision. <br />Michael B. Long <br />RE: Technical Revision No. 73; West Elk Mine; Permit No. C-BODgpgDirecror <br />Dear Ms. Welt; <br />The Division has reviewed Mountain Coal Company's (MCC) final <br />responses to the Division's adequacy letter, and proposes to <br />conversation today, November 1, 1994. <br />The outstanding issues concern the overburden analysis for LPG-6 <br />and LPG-7. The Division was concerned because three parameters <br />from LPG-7 were in the unsuitable range or raised concerns about <br />their results. However; MCC has indicated that the lab performed <br />an analysis of the coal and not the overburden. The other concern <br />is the sample from LPG-6 is from a hole adjacent to the proposed <br />ventilation entries and not directly through or above the entries. <br />It would be logical to assume that the material is identical to <br />where the entries will be placed and that the sample is <br />representative. However, with only one sample to base the <br />decision, the Division proposes that MCC collect two surface <br />composite samples once the pile is completed. Each composite <br />sample should be from five to six holes, two feet deep. The same <br />parameter list should then be tested with the addition of Acid-Base <br />Potential. This will require adding $CaC03 to the parameter list. <br />This proposal was discussed with you and agreed upon during a phone <br />Roy Romer <br />Governor <br />lames S. Loc hhead <br />Exec uuve Director <br />II~~~ <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />Please call if you have any questions. <br />Y. <br />Christine E. <br />Environmental <br />Specialist <br />007TR73.2 <br />_,_9 D <br />