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III IIIIIIIIIIIIIIII ~~ <br />STATE, OF CO~ulv~v- <br />Roy Romer. Govei <br />DEPARTMENT OF NATURAL RESOURCES <br />MINED LAND RECLAMATION DIVISION <br />FRED R. BANTA, Director <br />August 28, 1989 <br />Mr. Dennis Conn <br />West Elk Coal Company <br />P.O. Box 591 <br />Somerset, CO 81434 <br />Re: Lower Waste Pile honitoring Data Report, Mt. Gunnison No. 1, C-80-007 <br />Dear h1r. Conn: <br />The Division reviewed the monitoring data for the lower waste pile at the <br />Mt. Gunnison No. 1 underground coal mine submitted by West Elk Coal Company <br />(WECC). The submittal letter which was received July 28, 1989 presents <br />the most recent compaction test data and the survey data for the slope <br />stability monuments installed on the face of the waste pile. All seven of <br />the compaction determinations comply with permit requirements, varying between <br />relative compactions of 90% and 100 a. The slope stability monument survey <br />data suggests that 16 of the 17 monuments are stable. The one exception, <br />Monument #563, appears to have dropped 0.92 feet between March and June of <br />this year. From August of 1986 through Pdarch of 1989, Monument #SB3 has <br />demonstrated little variation in elevation. <br />West Elk Coal Company should determine whether Monument #S83 has actually <br />dropped 0.92 feet since March of this year, or whether a calculation or <br />typographical error has occurred in listing the survey results. If the <br />monument location is correct, WECC will need to examine the site for evidence <br />of slope instability, and report the findings as quickly as possible. <br />The 1989 2nd quarter pond/stockpile inspection reports were reviewed and found <br />to be in compliance. If you have any questions, please do not hesitate to <br />contact me. <br />Sincerely, <br />f c~c~0fv„~ <br />_(~j~ Matthew S. <br />Reclamation <br />POSH/ern <br />9273E <br />~/~ l~Lc. <br />Hayes <br />Speciali t <br />215 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. (303) 866-3567 <br />