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~~ <br />~p COO <br />.C4' _~90 <br />~~ O <br />• N } <br />t '' ~,•• <br />* /876 + <br />Richartl D. Lamm <br />Governor <br />DEPARTMENT OF NATURAL RESOURCES <br />OaviO H. Getchea Executive Director <br />MINED LAND RECLAMATION DIVISION <br />DAVID C. SN ELTON, Director <br />April 25, 1984 <br />2.3~~.,.~>wc~.< <br />c . H..,.,a.. <br />F i It 1'hF .~,`~1v n,Sw <br />~` Q <br />5 F 30. <br />APR ~'r i984 <br />Ms. Paige Beville :1EALIH, SAFETY & ENVIRONMENT <br />Anaconda Minerals Co. <br />555 17th Street <br />Denver, Colorado 80202 <br />RE: Technical Revision to Stockpile at Bear No. 1 Mt. Gunnison Mine <br />File No. C-007-80 <br />Dear Ms. Beville: <br />The Division has completed its review of your April 13, 1984 technical <br />revision. The revision proposes to stockpile colluvial material at the <br />• reclaimed Bear No. 1 site. The material will be excavated from the hillside <br />during construction of the silo. <br />Jim Pendleton of our staff expressed his geotechnical concerns to Craig Hansen <br />and Rocky Bowman during our mine site visit of April 20, 1984. I relayed my <br />remaining concerns to you by phone on April 24, 1984. The following is a <br />summary of our concerns and agreements. <br />1) Mr. Pendleton indicated that W.E.C.C. should submit designs that <br />indicate the rock face below the access road will be stable after <br />excavation of the fill. <br />2) Any designs on the drainage modification south of the coal silo should <br />be submitted. <br />3) The current status of the NPDES permit for the new pond should be <br />indicated. <br />4) W.E.C.C. should commit to a dewatering procedure (pumping) that could be <br />used as a backup when the NPDES permit is issued. <br />5) We agreed that the proposed drainage system at Bear No. 1 will not <br />interfere with the original Bear Mine drainage control system. <br />6) W.E.C.C. is encouraged to take operation responsibility for the area <br />• north of the diversion at Bear No. 1. In any case, the exact permit <br />boundary of W.E.C.C. needs to be indicated on a map and clearly marked <br />in the field. <br />423 Centennial Building, 1313 Sherman Street Denver,,Colorado 80203 Tel. (30'x) 866-3567 <br /><, <br />~ECE9~E~ <br />