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® Climax Molybdenum Henderson COLORADO Mill <br />o 68 A Freeport-McMoRan Company Empire, CO 80438 <br />Phone (303) 569-3221 <br />Fax (303) 569-2830 <br />March 31, 2011 REOFIVEr) <br />Via UPS Tracking Number: 1Z 804 847 13 6622 5642 APR 012011 <br />Mr. Peter Hays Division u? -wuiCiaAlon, <br />Division of Reclamation Mining and Safety Mining and Safety <br />1313 Sherman St., Rm. 215 <br />Denver, CO 80203 <br />Re: Permit M-1977-342, TR-04, Submittal of Construction Certifications and As-Built Drawings <br />for Environmental Protection Facilities <br />Dear Mr. Hays: <br />Climax Molybdenum Company (CMC) is pleased to submit Construction Certification and As-Built <br />Drawings for the following Environmental Protection Facilities (EPFs), related to Technical Revision JR) <br />04 (Environmental Protection Plan) of the Henderson Reclamation Permit: <br />• Mill Process Water Supply Pipeline Replacement. Construction was approved in a July 6, 2010 <br />letter from Allen Sorenson to Miguel Hamarat. <br />• Mill Seepwater Pipeline Extension. Construction was approved in a July 16, 2009 letter from <br />Allen Sorenson to Tim Haynes; <br />• Orfom D8 Depressant Use and Storage. Construction was approved in a May 22, 2008 letter <br />from Allen Sorenson to Tim Haynes. <br />Upon review and approval, CMC requests that DRMS send written approval of the facility as-built <br />drawings and construction certifications. <br />Please contact me at (303) 569-3221, ext. 1233 or Bryce Romig (ext. 1204) if you have any questions. <br />Sincerely, <br />Migu I HChief Environmental Engineer <br />Climax Molybdenum Company <br />Henderson Operations <br />Attachments: <br />1. Mill Process Water Supply Pipeline Replacement Construction Certification and As-Built <br />Drawings <br />2. Mill Seepwater Pipeline Extension Construction Certification and As-Built Drawings <br />3. Orfom D8 Depressant Construction Certification and As-Built Drawings <br />CC: A. Sorenson, DRMS <br />B. Romig, Climax