Laserfiche WebLink
<br />iii iiiiiiiiiiiu iii <br />BATTLE MOUNTAIN RESOURCES INC. <br />i1LE MWNfAIN <br />- ,_ „ D COMPANY <br />October 1, 1993 <br />. , l ,yy. <br />Mr. Larry Oehler - _ <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />RE: BATTLE MOUNTAIN RESOURCES, INC (BMRn -RESPONSES TO <br />COMMENTS, RECLAMATION EVALUATION REPORT, SAN LUIS <br />PERMIT NO. M-88-112 <br />Dear Larry: <br />Enclosed are three copies of the responses to comments on the Reclamation <br />Evaluation Report for the San Luis tailings facility. Along with the responses to <br />comments, we aze including a copy of the report entitled "Investigation mf Prediction <br />Techniques for Acid Mine Drainage". This study was performed by Coastech Research <br />Inc. for the Canada Centre for Mineral and Energy Technology, Energy, Mines and <br />Resources Canada. The study was performed to evaluate the prediction techniques for acid <br />generation of mine waste materials against actual field conditions. In addition, we are <br />enclosing a copy of the publication "Chemistry and Treatment of Cyanidation Wastes" by <br />Dr. Adrian Smith and Dr. Terry Mudder for the Division's library. This publication is <br />considered to be the most up to date publication on cyanide chemistry and treatment <br />methodologies. <br />As we have discussed with the Division, BMRI recently completed additional <br />testing of the tailings material. Three holes were completed in the lower disposal area. <br />Two of the holes were completed to a depth of 55 feet or approximately 38 feet into the <br />AVR deposited tailings. The third hole met with refusal at approximately 25 feet or 7.5 <br />feet into the AVR deposited tailings. Limited pore water samples were obtaihed from the <br />samples and will be tested for water quality with weak acid dissociable cyanide levels of <br />primary interest, followed by metals, if enough sample is available. <br />~L Ss..1- ~, , <br />5670 GREENWOOD PLAZA BLVD. SUITE 106 ENGLEWOOD, CO 80111 (303) 721-6744 FAX (303) 721-6813 <br />