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M I N R E C, I N C. <br />743 HORI7AN CCURT, SUITE 205 <br />CJtAND JUNCTION, CO 81506 <br />TSLEPRONE (303) 245-4101 <br />BLUE RIBBON MINB <br />~II'I~II~il~~ll~ II~ <br />~~~~I'1/'~N~ <br />NOV 2 0 1991 <br />Mined Land <br />November 1sRe1J9'lation Division <br />R. P. Price <br />Mined Land Reclamation Division <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Re:- Quar-terly-Bench stability-Moni-toting; - - <br />Permit No. C-81-047 <br />Dear Mr. Price: <br />The Yourth quarter 1991 bench stability survey was performed <br />November 14, 1991. Vertical angles were measured with a 20 <br />second theodolite and elevations were calculated using predeter- <br />mined horizontal distances. A summary of this survey, the last <br />two surveys and the 11-20-85 base line survey is as follows: <br /> 11-20-85 06-06-91 09-16-91 11-14-91 <br />S-1 6400.90 6400.66 6400.64 6400.62 <br />S-2 6396.06 6395.89 6395.89 6395.89 <br />S-3 6385.77 6385.59 6385.57 6385.53 <br />S-5 6479.92 6479.58 6479.57 6479.55 <br />S-6 6480.51 6479.85 6479.84 6479.79 <br />S-7 6479.31 6479.02 6479.02 6479.01 <br />S-8 6479.92 6479.53 6479.56 6479.49 <br />Let me know if there are any questions concerning this data. <br />Sincerely, <br />C <br />Jim Stover, P.E. <br />Chief Engineer <br /> <br />BENMON <br />