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~ iii iiiiiiiiniiiiii <br />• <br />15946 LA POSTA ROAD WEST <br />BODO OFFICE CENTER. UNIT A-i <br />POST OFFICE BOX 97 <br />DURANGO, COLORADO 81301 <br />TELEPHONE 303.247.1705 <br />CONSULTING CIVIL AND SANITARY ENGINEERING <br />LAND, UTLITY AND CONSTRUCTION SURVEYS <br />C-CS C~.A-~-.-I <br />r ....~ e~__t,,,, ~._ <br />37801 U.S. Highway 160 <br />Bayfield, Colorado 81122 <br />Dear Carl: <br />October 1, 1981 <br />Re: MONTOYA PIT <br />Enclosed herewith are my calculations for the <br />amount of fill material required to backfill the cut <br />slope bordering B.L.M. property. <br />Using a 3:1 fill slope, an estimated 25,000 Yd3 <br />of material would be required. A 2: ill slope would <br />require approximately 17,000 Yd Assuming an average <br />overburden depth of 6 feet throughout the site is <br />available, 2.6 acres and 1.7 acres of overburden, <br />respectively, would be needed to obtain the quantities <br />above. <br />If you have any questions, please call me. <br />Very truly yours, <br />Bruce A. Honisch, P.E. <br />BAH/mah <br />