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iiiiiiiiiiiiiiiihi <br />999 <br />©00 <br />Twentymile Coal Company <br />March 26, 2001 <br />Janet Binns <br />Environmental Protection Specialist <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />RECEIVED <br />APR 0 5 2001 <br />Division of Minerals 8 Geology <br />RE: Mid-term Review Response <br />Permit C-82-056 <br />Dear Ms. Binns: <br />The following represents the information requested by item number 3 in the Division's <br />letter of February 2, 2001. <br />Item No. 3, DMG letter of Feb 2, 2001 <br />The source of inert material will be the surfacing material, concrete pads or subsoils <br />located at each site. The volume of inert material required is described below. <br />No. 7 Escaae Shaft <br />Pad 1.9 acres <br />Total Volume to fill - 488 CY <br />Concrete pad liner - 8.9 CY <br />Grout plug top and bottom - 18.2 CY <br />Inert Material Needed - 460.9 CY <br />Inert Material From Pad <br />1.9 acres x 43560 ft2 = 82764 ftz <br />82764 ft2 x 0.25 ft = 41382 ft3 = 766 CY <br />This demonstrates that adequate material exists on the pad without impacting the post- <br />mining topography. Less than 0.25 feet would have to be removed from the footprint of <br />the pad to provide the fill. <br />EMD Dewaterina Borehole <br />Pad 1.65 acres <br />Total Volume to fill - 33.5 CY <br />29515 ROUTT COUNTY ROAD •27, OAK CREEK, CO 80487 PHONE: (970) 879-3800 FAX: (870) 87P8050 <br />