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MINREC, INC. <br />2768 COMPASS DRIVE, SUITE 101 <br />GRAND JUNCTION, COLORADO 81506 <br />PHONE: (303) 245-4101, FAR 242-7908 <br />BLUE RIBBON MINE <br />September 27, 1993 <br />C. E. Johnston <br />Division of Minerals & Geology <br />1313 Sherman St., Room 215 <br />Denver, Cclorado 80203 -- -- <br />Re: Quarterly Bench Stability Monitoring; <br />Permit No. C-81-047 <br />Dear Ms. Johnston: <br />III IIIIIIIIIIIII III <br />aF t J~~v FD <br />CEP X91993 <br />„~ <br />.. ~~~ -- <br />The third quarter 1993 bench stability survey was performed <br />September 25, 1993. 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 03-23-93 07-03-93 09-25-93 <br />S-1 6400.90 6400.60 6400.63 6400.63 <br />S-2 6396.06 6395.87 6395.87 6395.86 <br />S-3 6385.77 6385.53 6385.60 6385.53 <br />S-5 6479.92 6479.53 6479.55 6479.53 <br />S-6 6480.51 6479.82 6479.82 6479.79 <br />S-7 6479.31 6478.92 6478.93 6478.94 <br />S-8 6479.92 6479.56 6479.53 6479.50 <br />Let me know if there are any questions concerning this data. <br />Sincerely, <br />/Jim Stover, P.E. <br />Chief Engineer <br />BENNON <br />