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CLIMAX MOLYBDENUM COMPANY <br />t , A Sutwldarr of Phetye Oad9a Coryanuon <br />April 11, 2002 <br />Mr. Allen Sorenson <br />Environmental Protection Specialist <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />De C <br />APR 15 2402 ? <br />17tYlsla? Qf 81a?S and Geolasy <br />HENDEPsoN OyERAtton <br />98302 County Road :3 <br />Parshal3. Colorado 80488 <br />(3031 569.3221 <br />Fax 39701725.OWS <br />Liver, olorado 80203 z <br />Discharge, 3-Dam Seepwater Management, Henderson Milt, Technical <br />RE: Relocation Y" <br />Revision TR-09, ermit No. M-77-342 <br />Dear Allen: <br />This letter is being provided to inform the Division of Minerals and Geology (Division) of a <br />proposed relocation of the 3-Dam seepwater line discharge. Please find enclosed one set of <br />drawings detailing the proposed relocation. <br />Henderson would like to relocate the pipe discharge in order to move the accumulation point of <br />the metal oxide precipitation (sludge) that is currently taking place at the 3-Dam seepwater line <br />discharge. The lines currently discharge just upstream of the Ute Park Station seepwater inlet. <br />The low pH, high metal content 3-Dam Seepwater, when discharged into the more neutral pH <br />water of the 1-Dam seepwater canal, precipitates metal oxides. At this location it is difficult to <br />clean the sludge out of the inlet works and causes premature scaling and build up in our pumps <br />and pipelines. By relocating the discharge to the head end of the ] -Dam seepwater canal, we will <br />increase the detention time of the 3-Darn seepwater in the canal allowing precipitation to take <br />place away From our pump station and in 2 location that is easier to clean. The 3-Dam seepwater <br />will, of course, still be reporting to the same location for recycling into the mill water circuit. <br />Henderson would like to begin construction on this project in May 2002. <br />Please call if you have any questions or are in need of any further information before granting <br />approval for this change. I can be reached at (303) 569-3221 ext. 2214. <br />Very truly yours, <br /> <br />Erich Sower <br />Sr. Environmental Engineer <br />Climax Molybdenum Company <br />Enclosure <br />Ln <br />N <br />Z <br />W <br />Q <br />Q <br />Cc: Mike Ley -Climax <br />Rich Wagner - Climax