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~iiiiiiiiiiiiiiuiii <br />Richard D. Lamm <br />Governor <br />DEPARTMENT OF NATURAL RESOURCES <br />David H. Gefches. Executive Director <br />MINED LAND RECLAMATION DIVISION <br />DAVID C. SHELTO N, Director <br />DATE: February 14, 1986 <br />T0: Susan Mowry ~ <br />FROM: Jim Pendleton - ~~~~ <br />RE: BLUE RIBBO ~'IINE' UARTERLY BENCH CERTIFICATION - 4TH QUARTER, 1985 <br />BLUE RIBB 'S BENCH STABILITY MONITORING REPORT - 4TH QUARTER, <br />1985 (Permit No. C-81-047) <br />Pursuant to your request, I've completed a review of the two reports <br />referenced above. Both reports were submitted by the Blue Ribbon Coal <br />Company. Both reports are acceptable. The included data does verify that the <br />mine bench has been constructed in accordance with the approved design and is <br />stable. <br />We should be careful to ascertain that those tasks remaining to be completed <br />as a portion of the mine bench construction, namely placement of the cover <br />• material on the southwest end of the middle bench, rock placement around the <br />toe of the bench, and the installation of a ditch to contain the flow from the <br />underdrains, actually occurs when the construction season resumes. Further, <br />we should closely scrutinize the next quarterly bench stability monitoring <br />report, in order to verify that the discrepancies between the November 22, <br />1985 and December 23, 1985 survey observations were due to the use of a new <br />stadia rod. <br />cc: Bob Liddle <br />s rs <br />7472 <br /> <br />423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. (303j 866-3567 <br />