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<br />i <br />~II II~~I~~I~'I~~ ~I~ <br />STATE OF COLO1~vU <br />DIVISION OF MINERALS AND GEOLOGY <br />Depanmem of NaWral Resources <br />131 }Sherman Si., Runm ? 15 <br />Denver, Color, do 80203 <br />Phone: 1111}I 86fi-7 567 <br />FAX: UOJ~832-8106 <br />August 04, 1997 <br />Christine E. Johnston <br />Mountain Coal Company <br />P.O. Box 591 <br />Somerset, CO 81434 <br />Re: Minor Revision No. 219 (Revised Ventilation Shafr #3 Site); West Elk Mine; <br />Permit No. C-80-007 <br />Deaz Ms. Johnston; <br />The Division has reviewed the Minor Revision No. 219 application and has the following <br />adequacy comments. <br />I~~~~ <br />DEPARTMEf~fT OF <br />NATURAL <br />RESOURCES <br />Roy Romer <br />Governor <br />lames 5. Lochhead <br />E.ecmrve Duecmr <br />Michael 8. Long <br />Divis~an Dneaor <br />Page 5 of Exhibit 69 states that 151,000 CY of material will be excavated to construct the <br />ventilation shaft pad. The narrative explains that 6,300 CY will be used for facilities <br />development elsewhere on site, and that 130,000 CY will be hauled back for reclamation <br />of the shaft site. MCC has not explained what will become of the remaining 14,700 CY. <br />Please provide additional information which demonstrates that all available material will <br />be used to reclaim disturbed azeas to approximate original contour. <br />2. Using the cross-sections provided, DMG is unable to verify the volume estimate for <br />backfilling the ventilation shaft site. Applying the average end area method using the two <br />cross-sections (N-N' and O-O'), our estimated volume is significantly higher than <br />MCC's. Please either provide adequate cross-sectional coverage of the cut slopes or <br />provide electronic copies of the maps so that the volume may be verified. <br />3. The chart on Map 3E indicates that runoff from azea 43B-6 will flow to Ditch 17. Ditch <br />DSLY-17 is not shown on Map 3E or on Map 54B where all other hydrologic structures <br />are depicted. Please add DSLY-17 to Map 54B. <br />4. The chart on Map 3E indicates that runoff from 43B-2B will flow to DSLY-15. It would <br />appeaz, based on Maps 3E and 54B that runoff from this area will flow to DSLY-15. <br />Please verify the flow path. There also does not appear to be a DSLY-15 on the map. If <br />this ditch will be constructed, please add it to the map and designs as well. <br />