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_ COLORADO OPERATIONS <br /> Climax Molybdenum Hende <br /> rson 68 <br /> .O. ox <br /> A Freeport-McMoRan Company Empire, CO 80438 <br /> Phone(303)569-3221 <br /> Fax(303)569-2830 <br /> May 31, 2016 RECEIVED <br /> Sent via Email and UPS Tracking#: 1Z 804 847 03 7822 6843 JUN 0 2 2016 <br /> DIVISION OF RECLAMATION <br /> MINING&SAFETY <br /> Mr. Peter Hays <br /> Colorado Division of Reclamation, Mining and Safety <br /> 1313 Sherman Street, Room 215 <br /> Denver, Colorado 80203 <br /> Re: Permit M-1977-341, Submittal of Annual Water Monitoring Report— Henderson Operations <br /> Groundwater Management Plan <br /> Dear Mr. Hays: <br /> Climax Molybdenum Company (Climax) is submitting this Annual Water Monitoring Report to the Division <br /> of Reclamation, Mining and Safety (DRMS) pursuant to the requirements in Section 7.1 of the Henderson <br /> Operations Groundwater Management Plan (GWMP) approved on July 25, 2012 as Technical Revision <br /> 16 to Reclamation Permit No. M-1977-342. <br /> Included in this annual report are: <br /> • Data tables and graphs from triannual DRMS sampling events for Point of Compliance (POC) and <br /> non-POC wells for both the Henderson Mine and Henderson Mill. The data set includes <br /> completed 5-Quarters New Well Baseline Monitoring data from 2012-2013; <br /> • Explanation of outliers, trends, and Numeric Protection Limits (NPL) exceedances (where <br /> applicable); <br /> • Discussion of outlier data for Mill POC well MLGW-ACR, including the future plans for <br /> maintenance and monitoring of well; <br /> • Details regarding continued investigative progress for Mine POC well MNGW-1 and upcoming <br /> groundwater quality assessment submittals. <br /> If you have any questions or need additional information, please do not hesitate to contact me at (720)- <br /> 942-3420, or Miguel Hamarat at(720)-942-3255. <br /> Sincerely, <br /> Whitney Koester <br /> Environmental Engineer <br /> Climax Molybdenum Company <br /> Henderson Operations <br />