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MINREC, INC . ~~~ ~~~~~II~~~~~~~~~ <br />2768 COMPASS DRIVE, SUITE 101 <br />GRAND JUNCTION, COLORADO 81506 <br />PHONE: (303) 245-4101, FAR 242-7908 <br />BLUE RIBBON MINE ~'~~~I'~~~ <br />SEP ~ p ~ <br />DIVISiUN OF <br />September 28, 1992 MINERALS & GEULt;i;~ <br />C. E. Johnston <br />Mined Land Reclamation Division <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Re: Quarterly-.Bench_Stability-Monitoring;- - - <br />Permit No. C-81-047 <br />Dear Ms. Johnston: <br />The third quarter 1992 bench stability survey was performed <br />September 26, 1992. Vertical angles were measured with a 20 second <br />theodolite and elevations were calculated using predetermined <br />horizontal distances. A summary of this survey, the last two <br />surveys and the 11-20-85 base line survey is as follows: <br /> 11-20-85 04-01-92 06-13-92 09-26-92 <br />S-1 6400.90 6400.61 6400.63 6400.62 <br />S-2 6396.06 6395.89 6395.89 6395.88 <br />S-3 6385.77 6385.54 6385.56 6385.58 <br />S-5 6479.92 6479.52 6479.57 6479.55 <br />S-6 6480.51 6479.83 6479.84 6479.82 <br />S-7 6479.31 6478.95 6478.99 6479.02 <br />S-8 6479.92 6479.67 6479.59 6479.57 <br />Let me know if there are any questions concerning this data. <br />Sincerely, <br />StoP.E. <br />Chief Engineer <br />BENMON <br />