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® COLORADO OPERATIONS <br /> Climax Molybdenum MaP.O 68 <br /> Henderson Mine anndd Mill <br /> A Freeport-McMoRan Company Empire, CO 80438 <br /> Phone(303)569-3221 <br /> Fax(303) 569-2830 <br /> November 6, 2015 <br /> Certified Mail # 7015 0640 0007 5449 4776 Itev'�" <br /> Mr. Peter Hays <br /> Environmental Protection Specialist .�aN <br /> 1313 Sherman Street, Room 215S�gNpp <br /> Denver, CO 80203 MINA ' <br /> Re: Climax Molybdenum Company,Henderson Mill,Permit No. M-1977-342 <br /> Technical Revision No. 22, Tailing Delivery Line Refurbishment& Droptower 15 <br /> and 16 Removal <br /> Dear Mr. Hays, <br /> Climax Molybdenum Company (CMC) is hereby submitting the final as-built drawings for the <br /> approved refurbishment of the Tailing Delivery Line and removal of Droptowers 15 and 16. <br /> Please find enclosed with this letter two as-built sets of drawings and two Engineer of Record <br /> certifications by W.W. Wheeler&Assoc. and Baur& Assoc. for piping and structural designs, <br /> respectively. Please note that there was an overlap of efforts between Technical Revision 24 <br /> (RCP to HDPE Pipe Replacement, Droptower 13 & 14 Removal) and this Technical Revision <br /> (TR-22), which explains the common drawings and certifications. <br /> If you have any additional questions, concerns or require more information regarding this <br /> project,please feel free to contact me at(720) 942-3518 or Miguel Hamarat(720) 942-3255. <br /> Regards, <br /> Tim Haynes TR22 <br /> Sr.Environmental Engineer <br /> Freeport-McMoRan Copper&Gold <br /> Climax Molybdenum Company <br /> Henderson Mill <br /> 19302 County Road 3 <br /> Parshall,CO 80468 <br /> 720-942-3518 ✓ Compliance <br /> tim haynes(a,fmi.com <br /> ✓ NO Violations <br /> CC: M. Hamarat(CMC) <br />