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<br />STATE OF III IIIIIIIIIIIII III <br />COLUI~UU <br />DIVISION OF MINERALS AND GEOLOGY <br /> <br />Deparlmenl of Natural Re <br />1313 Sherman St <br />Ruum <br />sources <br />215 <br />C f <br />~~ Q~ <br />~ <br />~ <br /> <br />` <br />., <br />Denver <br />Colorado 80203 ~ <br />1 y <br />~ <br />. <br />Phone. 1303) 866-3567 ~ I <br />~~ <br />II <br />FAX. (303) N32-8106 <br /> DEPARTMENT OF <br /> NATURAL <br />DATE: August 21, 1998 RESOURCES <br /> <br /> <br />TO: <br />Jim Burnell Roy Ramer <br />~OVef^or <br /> <br />' lames 5. Lochhead <br /> _ Eaecw ive Dueaor <br />FROM: Jim Pendleton ~ r,+khae~ B Long <br /> Division Dueclur <br />RE: Mountain al Co y, August, 1998 <br /> Semi-Annual Subsidence Monitoring Report <br /> (Permit No: C-80-007) <br />I have reviewed the August, 1998 semi-annual subsidence data report submitted by <br />Mountain Coal Company for mining within the "B" Seam at their West Elk Mine. This <br />report presents a clear rendition of the survey data for Mountain Coal Company's <br />numerous subsidence monitoring points. While the annual report is intended to contain <br />an in depth discussion of the observed movement, the Division recently amended <br />Mountain Coal's (MCC's) permit requirements to require a brief discussion in the semi- <br />annual report, as well. MCC's brief cover letter discussion and detailed data report are <br />acceptable. <br />The maximum reported vertical subsidence (8.28 feet) continues to be less than the <br />predicted magnitude 12.25 feet for the F Seam, 7.97 feet for the B Seam and 10.22 <br />feet superimposed total) contained within MCC's amended permit application. I <br />recommend acceptance of the report as submitted. <br />cc: Larry Routten <br />doc: M:\COAL\JAP\MTG1898.SUB <br />J P\l P <br />