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Q O v ~ I0\ O <br />0 O ~ <br />• <br />For: R. G. Atkinson April 6, 1993 <br />1989-1992 OVERBURDEN SHELL FACTOR ANALYSIS <br />On October 1, 1992, an aerial survey was made by Intermountain <br />Technical Services of Colowyo's open pit mining project located in <br />Moffat County, Colorado. Topographic maps were completed on a one- <br />inch equal to one-hundred foot scale with five-foot contours and <br />cross-sections prepared. Volumetrics were then prepared for both <br />total cut and total fill volumes. The results are tabulated <br />below. <br />CUBIC YARDS <br />TOTAL CUT VOLUME <br />• Adjustments <br />A. Less Coal Mined <br />B. Less Topsoil Removed <br />Subtotal <br />TOTAL STRIPPING <br />INCEPTION TO <br />1992 <br />359,751 <br />43,573 <br />2,255 <br />45,828 <br />313,923 <br />(1000) <br />9/30/89 TO <br />1OJ01/92 <br />99,673 <br />11,856 <br />659 <br />12,515 <br />87,158 <br />TOTAL FILL VOLUME <br />A. Streeter Fill <br />B. Mine Fill <br />Subtotal <br />C. Less Topsoil Replaced <br />TOTAL FILL <br />50,328 <br />318,132 <br />368,460 <br />1,464 <br />366,996 <br />0 <br />101,912 <br />101,912 <br />540 <br />101,372 <br />16.31% <br />Swell Factor % _ (Fill - Cut)x100 16.91% <br />Cut <br />• <br />