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II1I1IIIfjIOhIL. • • <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Deparirnrm of Natural Resources <br />1 11'1 Mormon St., Room 215 <br />D -nver. Colorado 80103 <br />Phunw (J011866.3567 <br />FAX: 0011833 S I O#, <br />April 27, 2000 <br />Mr. Erich Bower <br />Climax Molybdenum Company <br />19302 County Road #3 <br />Parshalt, CO 80468 <br />RE: 2 -Dam Decant Grouting and 3 -Dam Seep Water Management, Henderson Mill, <br />Technical Revision TR-09, Permit No. M -77 -342 <br />Dear Mr. Bower: <br />On April 27, 2000 the Division of Minerals and Geology issued a conditional approval of the technical <br />revision application submitted to the Division on April 12, 2000 addressing the following: <br />2 <br />Grouting a portion of the abandoned No. 2 -Dam decant system and the installation of parallel <br />gravity lines to route No. 3 -Dam seepage to the No. 1 -Dam seepwater collection system. <br />Sill Owens <br />Governor <br />Greg t Waetrer = <br />Esecutne ammo, V <br />Michael a. Long <br />Drown Director <br />The terms of the technical revision TR -09 approved by the Division are hereby incorporated into Permit <br />No. M -77 -342. The conditions of the Division approval arc listed below. Please note that all other <br />provisions of Permit No. M -77 -342 remain in full force and effect. <br />Stipulation No. Description <br />1 <br />The 3 -Dam seepage pipelines will not be put into service until the Division has <br />issued written acceptance of the certification of the facility as required under <br />Rule 7.3.2(2) of the Hard Rock/Metal Mining Rules and Regulations. The <br />certification shall be accompanied by a construction report that will detail the <br />installation of the pipelines, including pipe and valve specifications, a description <br />of the inlet structures, seepage barriers and south dike reconstruction, a <br />description of any problems that occurred and their resolution, and a description <br />and test results of pipeline integrity testing. <br />The 3 -Dam seepage pipelines will be tested for integrity at least once per year <br />and a description of the testing and results will be provided in the annual <br />reclamation report for the Henderson Mine and Mill <br />3 Within 60 days of completion, a growing report will be provided for the 2 -Dam <br />decant system growing operation. The report will detail the installation of the <br />DIV1SIOx 01 <br />MINE RA1.1 <br />GEOLOA) <br />RECLAMAT OP' <br />MINING•SA Y <br />