Laserfiche WebLink
~ blue <br />~ ~ ribbon <br />coal <br />company <br />SEP ~31988 <br />MINED LAt.C <br />RECLAMATION DIV151Qn7 <br />Susan J, Mowr3' <br />Mined Land Reclamation Di~•ision <br />923 Centennial Building <br />1313 Sherman Street <br />Denver, CO 80203-2273 <br />iii iiniiiiiiiii iii <br />999 <br />bWe nbbon coal company <br />p o. box 1352 <br />palisade, Coloratlo 81526 <br />(303) a6a-7951 <br />September 21, 1988 <br />Re: Quarterly Bench Stability Monitoring <br />Permit No. C-81-047 <br />Dear Susan: <br />• The third quarter 1988 bench stability survey was taken September <br />20, 1988. Vertical angles were taken with a 20 second theodolite <br />and elevations were calculated using predetermined horizontal <br />distances. A summar.v of this survey, the last two surveys and <br />the base line survey is as follows: <br /> 11-20-85 3-11-88 6-24-88 9-20-88 <br />S-1 6400.90 6400.68 6400.11 6900.7D <br />S-2 6396.06 6395.88 6395.95 6395.93 <br />S-3 6385.71 6385.54 6385.58 6385.61 <br />S-5 6-779.92 6479.55 6479.0"1 6379.58 <br />S-6 6480.51 6419.81 6919.88 6479.93 <br />S-7 6479.31 6478.91 6-779.09 6419.08 <br />S-8 6979.92 6479.96 6479.60 6419.57 <br />Let me know if there are any questions concerning these numbers. <br />Sincerely, <br />~,~i <br />Jim Stover, P.E. <br />Chief Engineer <br />• JES:tds <br />