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Sincerely, <br />Climax Molybdenum <br />A Freeport - McMoRan Company <br />January 14, 2013 <br />Sent Via Email and and UPS Tracking # 1Z 804 847 03 7797 9498 <br />r/ <br />Mr. Peter Hays <br />Division of Reclamation Mining and Safety <br />1313 Sherman St., Rm. 215 <br />Denver, CO 80203 <br />RE: Permit No. M- 1977 -342, TR -10, Submittal of Construction Certification and As -Built <br />Drawings for 1 -Dam Wellfield <br />Dear Mr. Hays: <br />Climax Molybdenum Company (CMC) is submitting Construction Certification and As- Built/Record <br />Drawings for the Henderson Mill 1 -Dam Wellfield Environmental Protection Facility (EPF), related to <br />Technical Revision (TR) 10 of the Henderson Reclamation Permit. The purpose of TR -10 was to install a <br />groundwater interceptor wellfield downgradient of 1 -Dam tailing impoundment. CMC submitted its <br />request for approval of TR -10 on May 15, 2001 (see Attachment 1). <br />The installation of the interceptor wellfield and pumping system was installed during the Phase I of the <br />project, however as noted in the 2010 URS Certification Letter (Attachment 2), observation wells <br />contemplated in Phase 11 were not installed. In 2012 CMC contracted AJAX to install additional <br />observation /monitoring wells and complete a capture zone assessment utilizing these new wells along <br />with previously installed monitoring wells and piezometers (Attachment 3). AJAX concluded that the <br />expanded extraction well, monitoring well and piezometer network provides groundwater capture and <br />monitoring consistent with the original TR -10 submittal. <br />Upon review and approval of this submittal, CMC requests that the DRMS send written approval of the <br />facility as -built drawings and construction certification. If you have any questions or require additional <br />information, please contact me at 303 569 -3221, ext. 1233 or Bryce Romig at ext. 1204. <br />Miguel Hamarat <br />Chief Environmental Engineer <br />Climax Molybdenum Company <br />Henderson Operations <br />COLORADO OPERATIONS <br />Henderson Mill <br />P.O. Box 68 <br />Empire, CO 80438 <br />Phone (303) 569 -3221 <br />Fax (303) 569 -2830 <br />JAN <br />1 2.013 r/ <br />Division of Rec 3mattion, <br />Mining & Safety f/ <br />