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November 20, 2000 <br />Ms. Sandra Brown <br />Colorado Division of Minerals and Geology <br />Office of Mined Land Reclamation <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />~/' ~~~0 <br />RECEIVED <br />NOV 27 2000 <br />Division of Minerals 8 Geology <br />Re: Elk Creek Mine Rock Safety Catch Bench Construction, Minor Revision No. 55, <br />Permit No, C-1981-022 <br />Dear Ms. Brown: <br />On November 08, 2000, Oxbow Mining, Inc. (OMI) submitted an application for MR 55 to <br />construct a rock safety catch bench at the upper limit of the Elk Creek Mine site slope <br />stabilization (borrow) area. The pioneer road will be retained as a maintenance road <br />and will also serve as an additional catch bench through the life of the mine site. To <br />supplement that application, OMI has directed Montgomery Watson to complete designs <br />for four culverts to direct flows (if any) from the rock catch bench through the <br />maintenance road to the downdrains. A copy of the designs will be forwarded to you <br />and will also be incorporated into the PR 04 document. The maintenance road will be <br />graded to pitch approximately 15% (or less) into the slope. The safety catch bench will <br />be graded to pitch up to approximately 30% into the slope to provide a better rock <br />bounce-back angle onto the bench, yet still allow access by maintenance equipment. <br />This information, along with the safety catch bench designs and the reclamation plan <br />provided in the original application, will be incorporated into the PR 04 permit document <br />being reviewed. Please call me at (970) 929-5834 should you have questions or require <br />further information. <br />Sincerely, <br />~~~~~ <br />Kathleen G. Welt, <br />Environmental Supervisor <br />cc: Jerry Nettleton, Montgomery Watson <br />Tom Anderson, OMI <br />3 7 3 7 Hwy 1 3 3 P O e o x 5 3 5 <br />TEL (9 7 0) 9 2 9- 5 1 2 2 <br />Somerset C o l o r a d o 8 1 4 3 4 U S A <br />• FAX (9 7 0 ) 9 2 9- 5 1 7 7 <br />