Laserfiche WebLink
ii <br />999 <br /> STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Depanment of Natural Resources <br />1313 Sherman St., Room 215 J <br />y <br /> <br />Denver, Colorado 80203 l <br />~~ <br /> <br />Phone: 13031 86h-3567 I I <br />FAX: (3031832-8106 <br /> DEPARTMENT OF <br /> NATURAL <br /> RESOURCES <br />August 1, 1995 <br />Roy Romrr <br /> Governor <br />Mr. Henry Barbs <br />lamess.l«hhead <br />Hountain Coal Com an <br />P Y Executive Director <br />P .O. Sox 591 <br />Somerset, CO 81434 Michael B. Lang <br />Drvison Director <br />REt Annual Subsidence Report (Year-end Report); Nest Blk Mine; Permit No. C- <br />80-007 <br />Dear Mr. Barbe; <br />The Division has reviewed the Annual Subsidence Report, year-end report; for the <br />West Elk Hine. The survey was completed during October 1994 and the report was <br />submitted to the Division on April 28, 1995. The report presents a clear <br />rendition of the subsidence monitoring data for the West Elk Mine. The <br />presentation ie straightfoward and comprehensive. <br />To date the maximum observed subsidence is 8.55 feet. This vertical displacement <br />was observed in a location overlying multiple seam mining within both the F and <br />B seams. This observed subsidence compares conservatively with the maximum <br />projected multiple seam subsidence of 10.22 feet. <br />The Division has the following questions and comments regarding this report: <br />1. Point 91 was noted ae being "pulled out". Please explain. <br />2. Structures that are monitored during a reporting period, i.e. Mautz <br />cabin, please show the location of the structures on the Subsidence <br />Monitoring Network map. <br />Please respond to the above questions by August 31, 1995. <br /> <br />Environmental <br />Specialist <br />LEJ/007SU0. 1094 <br />