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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: (303) 832-8106 <br />MEMO TO FILE <br />COLORADO <br />DIVISION O F <br />MIN SRALS <br />GEOLOGY <br />RECLAMATIO N•MINING <br />sA FETT•SCIENCE <br />Bill Owens <br />Governor <br />Russell George <br />Executive Director <br />Ronald W. Cottony <br />Division Director <br />Natural Resource Trustee <br />Date: 12/14/2004 <br />Specialist: Allen C. Sorenson~Signed: ~ ~` <br />SubjecUOperator/Operation/File No. Loss of Containment of Mill Water, Climax Molybdenum Co. <br />Type of Interaction: Meeting Phone Other <br />Person(s) contacted and affiliation: Tim Haynes, Henderson Mill Environmental Coordinator <br />Summary and Resolution of Interaction: <br />Mr. Haynes left a "Rule 8"notification on voice mail the morning ofDecember 14, 2004. He stated that a leak <br />had developed in a fire water system pipeline on December 13, 2004. The fire water system is fed by process <br />water stored in the large capacity mill water tanks located east of the mill. The mill water is high in total <br />dissolved solids, but is not contaminated by high concentrations of the more toxic heavy metals. The most <br />significant contaminants in the mill water are manganese, which runs azound 10 to 30 mg/L and sulfate, which <br />runs 1000 to 1600 mg/L. Both sulfate and manganese are secondary drinking water contaminants. <br />Most of the leak water flowed into Bear Paw Gulch, which is tributary to the tailing impoundment. Henderson <br />conservatively estimates that as much as 25,000 gallons may have escaped containment of Bear Paw Gulch, and <br />flowed northeast toward the Williams Fork River. This water was consumed by the snow pack, and no direct <br />discharge to the river is believed to have occurred. Henderson does not believe any damage to human health or <br />the environment occurred as a result of the leak. Henderson will file a written report on this matter in <br />accordance with Rule 8 of the Hard Rock/Metal mining Rules and Regulations of the Colorado Mined Land <br />Reclamation Boazd. <br />cc: Tim Haynes, Henderson Mill (via email) <br />Bruce Humphries, DMG (via email) <br />Cazl Mount, DMG (via email) <br />o:\acs\LOANER MACHINE\My DocumentsViendersonrnill water spill MTF.doc <br />Office of Office of Colorado 'l <br />Mined Land Reclamation Active and Inactive Mines Geological Survey' <br />