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1111111111111111111 <br /> 999/11' STATE OF COLORADO <br /> DIVISION OF MINERALS AND GEOLOGY <br /> Department of Natural Resources PPW,7 7, <br /> 1313 Sherman St, Room 215 <br /> Denver,Colorado 80 203 <br /> Phone (303)866-3567 <br /> FAX (303)832-8106 <br /> DEPARTMENT OF <br /> NATURAL <br /> RESOURCES <br /> August 25, 1997 <br /> Roy Romer <br /> Governor <br /> Mr. Bryce Romig <br /> James S Lochhead <br /> Climax Molybdenum Co. Executive Director <br /> Climax Mine Michael B Long <br /> Climax, CO 80249 Division Director <br /> RE: Modified Design Considerations for 4-Dam Seep <br /> Return System, Climax Mine, Permit No. ,,i=77-493 <br /> Dear Mr. Romig: <br /> The Division has completed a review of your letter dated August 18, 1997 <br /> in which it is proposed to eliminate the leak collection system from the <br /> approved design for the new 4-Dam Seep Return System. Included with this <br /> proposal is a plan to include leak testing prior to commissioning the <br /> system and to install a pressure drop switch that would shut down the <br /> system in the event of a substantial drop in line pressure. Given the <br /> dramatic improvement in the water quality of the 4-Dam seep since the <br /> tailing removal project was completed, the Division concurs that the leak <br /> collection system previously approved is no longer necessary, and hereby <br /> approves the plan for a modified design described in your August 18, 1997 <br /> letter. <br /> The Division recommends that hydrostatic testing using the "Monitored Make- <br /> up Water Test" as described in the Chevron System Testing guidance document <br /> would be most appropriate for testing of the 4-Dam Seep Return pipeline. <br /> Be advised that the Division would not accept testing of the pipeline by <br /> the "Initial Service Testing" method described in that same guidance <br /> document . <br /> If you have any questions, please contact me. <br /> Sincerely, <br /> Allen C. Sorenson <br /> Reclamation Specialist <br /> C:\WP51\CL1MAX.PPE <br />