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~II I~~II~~III'~~ ~~~ <br />STATE OF OLORADU <br />Roy Romer, Governor <br />DEPARTMENT OF NATURAL RESOURCES <br />MINED LAND RECLAMATION DIVISION <br />DAVID C. SHELTON, Director <br />DATE: 27 August 1987 <br />T0: Dan Mathews ~ _ <br />FROM: Jim Pendleton <br />RE: Twnetymil oal Comp - Foidel Creek Mine (Permit No: C-82-056) <br />987 S nual Subsidence Survey Report <br />Pursuant to your request, I have reviewed the above referenced semi-annual <br />subsidence monitoring report. The data depicts minor subsidence occurring <br />above a portion of the 1st Panel South off the 1st Main West of the Foidel <br />Creek underground mine. Subsidence monuments SM-26 through SM-30 show from <br />0.3 to 1.0 foot of vertical movement. These monuments overlie that portion of <br />the 1st Panel South which had been completely retreat mined prior to the June, <br />1987 survey. Monuments SM-31 through SM-39, which overlie a portion of the <br />same panel which has been limited to partial extraction, show no subsidence tc <br />date. This verifies the projections included within the subsidence survey <br />portions of the approved application. The subsidence control plan was <br />developed to protect Routt County Road No. 27, and adjoining structures, <br />pipe]ines, power lines, etc. Subsequent surveys will verify the plan's <br />ultimate sufficiency. <br />The report and survey completed comply with the requirements of the approved <br />permit application, as amended. <br />cc: Bob Liddle <br />423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. (303) 866-3567 <br />