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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman SL, Room 215 <br />DenveL Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: {303) 832-8706 <br />October 2, 2002 <br />Mr. Erich Bower <br />Climax Molybdenum Company <br />19302 County Road 3 <br />Pazshall, CO 80468 <br />RE: Approval of Temporary Culvert and Crossing over Interceptor Canal, <br />Henderson Mill, Permit No. M-1977-342 <br />Dear Mr. Bower: <br />Bill Owens <br />Govemar <br />Greg E. Walther <br />Executive Director <br />Ronald W. Cattany <br />Acting Division Director <br />The Division of Minerals and Geology (DMG) has reviewed your letter and attachments dated <br />September 24, 2002 proposing a temporary crossing over the Interceptor Canal to facilitate topsoil <br />stockpiling operations. As we have discussed, the Interceptor Canal is an Environmental Protection <br />Facility as defined in Rule 1.1(15) of the Hard Rock/Metal Mining Rules and Regulations of the Mined <br />Land Reclamation Board and is subject to the provisions of Rules 7 and 8. The installation of the <br />culvert and crossing will temporarily impinge on the flow capacity of the canal; your proposal includes <br />the contingency of culvert and crossing removal in the event of unusually large snowpack <br />accumulation. The Division hereby approves the temporary installation of the culvert and crossing <br />with the following condition applied as a clarification. to the flooding contingency plan. <br />At the beginning of April and again at the beginning of May during each yeaz that the <br />Interceptor Canal is impinged by the temporary culvert and crossing, the snowpack will be <br />evaluated by reference to the Jones Pass and Glen Maz Ranch (Summit Ranch) Snotel sites. If <br />the snow/water equivalent at either of these sites exceeds 125 percent of average, Henderson <br />will consult with DMG about the potential need to remove the temporazy culvert and crossing <br />from the Interceptor Canal prior to intensive snowmelt runoff. This consultation may include a <br />requirement to model and estimate the flows in the canal that would result from snowmelt <br />anticipated based on the Snowtel data. <br />If you have any questions, please contact me. <br />Sincerely, <br />Allen C. Sorenson <br />Reclamation Specialist <br />cc: Carl Mount, DMG (via electronic transmission) <br /> <br />D [VISION O F <br />MINERALS <br />`r & <br />~~~ ),{~ GEOLOGY <br />"\ RECLAMATION <br />MINING•SAFETY <br />c:~hfy Documen[s~henderson interceptor crossing.doc <br />