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,0( <br /> COLORADO OPERATIONS <br /> ® Climax MolybdenumHenderson Mine and Mill <br /> A Freeport-McMoRan Company P.O. Box 38 <br /> t <br /> p p y Empire, CO 80438 <br /> Phone (303) 569-3221 <br /> Fax (303) 569-2830 <br /> March 17th, 2020 RECEIVED <br /> Sent Via UPS Certified Mail Tracking: 1Z8046410291007400 MAR 2 0 2020 <br /> Mr. Peter Hays EC DIVISION OFR <br /> Environmental Protection Specialist MIIONOFR LAMA1 <br /> AN1313 Sherman Street, Room 215 ' <br /> Denver, CO 80203 <br /> Re: Climax Molybdenum Company, Henderson Mine, Permit No. M-1977-342 <br /> Technical Revision No. 29, 3 Dam Buttress Stage 1 <br /> Dear Mr. Hays, <br /> Technical Revision (TR) No. 29 to the Henderson Mine Permit No. MO1977-342 was approved <br /> by the Division of Reclamation, Mining and Safety on April 4th, 2018. This TR is for the phase I <br /> construction of a buttress on 3 Dam. As required, Climax Molybdenum Company is submitting <br /> the enclosed as-built drawings and engineering certification for this project. As-builts are <br /> included in Attachment 1. A certification statement by our Chief Engineer is included in <br /> Attachment 2. <br /> If you have any additional questions, concerns or require more information regarding this <br /> project, please feel free to contact me at (720) 942-3480 or Miguel Hamarat at (720) 942-3255. <br /> Regards, <br /> Amber Parmet <br /> Senior Environmental Engineer <br /> Climax Molybdenum Company <br /> Henderson Operations <br /> Attachments: <br /> 1. Stage 1 - 3 Dam Buttress Phase I As-Builts <br /> 2. Stage 1 - Certification Statement <br /> cc: M. Hamarat (CMC), email <br /> A. Hilshorst (CMC), email <br />