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III IIIIIIIIIIIIIIII <br />999 <br />STATE OF COLORADO <br />Roy Romer, Govei <br />DEPARTMENT OF NATURAL RESOURCES <br />MINED LAND RECLAMATION DIVISION <br />FRED R. BANTA, Director <br />DATE: August 23, 1989 <br />T0: Matt Hayes ~^-~ <br />FROM: Jim Pendleton ~ <br />RE: West Elk Com aste Pile Monitoring Data Report <br />(Permit No: C-80-007) <br />I have reviewed the monitoring data for the lower waste pile at the Mt. <br />Gunnison No. 1 underground coal mine, submitted by West Elk Coal Company <br />(WECC). The submittal letter presents the most recent compaction test data <br />and the survey data for the slope stability monuments installed on the face of <br />the waste pile. All seven of the compaction determinations comply with permit <br />requirements, varying between relative compactions of 90% and 100%. The slope <br />stability monument survey data suggests that 16 of the 17 monuments are <br />stable. The one exception, Monument #SB3, appears to have dropped 0.92 feet <br />between March and June of this year. From August of 1986 through March of <br />1989, Monument #SB3 has demonstrated little variation in elevation. <br />I suggest that you direct West Elk Coal Company to determine whether Monument <br />#SB3 has actually dropped 0.92 feet since March of this year, or whether a <br />calculation or typographical error has occurred in listing the survey <br />results. If the monument location is correct, I suggest that you ask WECC to <br />examine the site for evidence of slope instability, and to report their <br />findings to you as quickly as possible. <br />cc: Sue Mowry <br />215 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. (303) 866-3567 <br />