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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Depanmenl of Natural Resources <br />1 31 7 Sherman 51.. Room 21 5 <br />Denver, Colorado 80?03 <br />Phone (3031 866-3567 <br />FAX: (303) 832-810h <br />DATE: October 7, 1997 <br />TO: Mike Boulay ~ <br />FROM: Jim Pendleton --- ~""`~ ~ <br />RE: West EI ine - 7/97 '-Annual Subsidence Data Report <br />rt No: C-SO-007) <br />II~~~ <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />Foy Romer <br />Goeernor <br />Izme. S. Luchhezd <br />E~ecmrve Duecmr <br />ntv:hael B. Long <br />Division Dneaor <br />I have reviewed Mountain Coal Company's July, 1997 semi annual (data only) subsidence report, <br />which you forwarded to my attention. The data on subsidence movement appears consistent with <br />earlier observations. Movements in the interim period since last fall's monitoring have been <br />minor, as expected. Cumulative subsidence continues to be less than originally projected in <br />Mountain Coal Company's subsidence evaluation <br />Ms. Johnston included brief discriptions of the visual observations conducted during the survey <br />transects. I assume this is in response to my review comments concerning their last annual <br />report. This is an improvement over previous reports. Combined with a map indicating the <br />location and orientation of the cracks and other features described, and photographs of the <br />features, my earlier concerns would be satisfied. If MCC requests additional guidance, I <br />recommend that you forward a copy of the Roadside Mine's visual monitoring report as an <br />example of the preferred style of presentation. <br />The report does meet the requirements and expectations for MCC's semi-annual subsidence data <br />report. As such, I recommend it's acceptance to the Division. <br />cc: Dave Beny <br />doc: M:\COALUAP\MTGSUB97.WPD <br />JP/jP <br />