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LAFARGE ~" <br />NORTH AMERICA <br />Construction Materials <br />CERTIFIED MAIL <br />7001-1140-0003-5905-5937 <br />v/ <br />~~~2 <br />October 21, 2002 <br />Division Of Minerals and Geology <br />Department of Natural Resources <br />1313 Sherman Street, Rm 215 <br />RECEIVE® <br />OCT 2 22002 <br />J <br />Denver, CO 80203 Division at Minerals and Geology <br />J ~ <br />Re: East Rigden Pit, M-1979-097, Technical Revision- Stability Plans and <br />Specifications. <br />Dear Ms. Crosby <br />Attached to this letter is the slope stability design and plans for the East Rigden <br />Pit. Lafarge intends to follow the designs outlined by Lafarge's Consultants <br />Anderson Consulting Engineering if the design meets your approval. Lafarge <br />believes that the design will mitigate the issues outlined in the October 9, 2002 <br />DMG inspection report, and we hope that the designs plan will meet your <br />requirements as a suitable technical revision. <br />We also included the substitute supply plan for the Brose Pit with this technical <br />revision request. <br />If you have any questions or concerns please to not hesitate to call. <br />Cordially, <br />LAFARGE WEST, INC. <br />~_-- <br />Eric Reckentine <br />Land Manager <br />(303) 657 4330 <br />LAFARGE WEST, INC. <br />1590 W. 12th Ave., Denver, Colorado 80204-3410 <br />Office: (303) 657-4000 Fax: (303) 657-4339 <br />%inteE on Parytletl VaPV <br />