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Climax MolybdenumClimax Mine <br /> Hwy 91 —Fremont Pass <br /> Climax, CO 80429 <br /> A Freeport-McMoRan Company Phone (719)486-2150 <br /> Fax(719)486-2251 <br /> Sent by Certified Mail <br /> RECFI IFF <br /> May 2, 2016 <br /> Eric Scott v MAY 0 4 2016 <br /> Environmental Protection Specialist <br /> Division of Reclamation, Miningand SafetyDIVISIONMOF RECLAMATION <br /> YON <br /> MINING AND SAFETY <br /> Department of Natural Resources <br /> 1313 Sherman St. Room 215 <br /> Denver, Colorado 80203 <br /> Re: 2015 Annual Report Addendum-TSF Horizontal Drains and Updated Contacts to <br /> TSF O&M Plans (TR-23), Climax Molybdenum Company Permit No. M-1977-493 <br /> Dear Mr. Scott: <br /> This letter and attached figure is intended to supplement the annual evaluation of tailing facilities <br /> in Appendix 5 of the 2015 Climax Mine Annual Report. The figure shows the locations of <br /> several horizontal drains installed in 2015 as well as the approximate number and location of <br /> drains to be installed in 2016 at 1 Dam(Robinson TSF). The drains are considered to be routine <br /> maintenance measures that are needed periodically to control the phreatic surface in the TSF <br /> dams. Climax will continue to provide information on these types of maintenance measures in <br /> future Annual Reports. Also attached to this letter are replacement pages with updated contact <br /> information for the Tenmile and Mayflower TSF O&M Plans that were submitted to DRMS as <br /> TR-23. <br /> Please accept this letter and attachments for your files. Climax also will maintain this <br /> information with our copies of the 2015 Annual Report and TR-23. Please feel free to contact <br /> me at 719-486-7584 if you have any questions on the attached information. <br /> Sincerely, <br /> 1110 <br /> Raymond Lazuk <br /> Environmental Manager <br /> attachments <br />