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COLORADO OPERATIONS <br /> Climax Molybdenum Henderson Mine <br /> ® P.O. Box 68 <br /> A Freeport-McMoRan Company Empire, CO 80438 <br /> RECEIVED PhoneFax(303)569-2830 <br /> JUN 0 5 2023 <br /> May 31, 2023 <br /> Colorado Division of Redama ^ <br /> NAnMg and Safety <br /> Submitted via email and UPS Ground 1Z 804 847 03 4477 4761: <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. <br /> • Explanation of outliers, trends, and Numeric Protection Limits (NPL) exceedances (where <br /> applicable). <br /> If you have any questions or need additional information, please do not hesitate to contact me at <br /> bbates1(a�fmi.com, or (970) 433-0894, gniggele(cDfmi.com, or (720) 671-2248, or Miguel Hamarat at <br /> mhamaratafmi.com, or(720) 942-3255. <br /> Sincerely, <br /> Ben Bates <br /> Senior Environmental Engineer <br /> Climax Molybdenum Company <br /> Henderson Operations <br /> Attachments: <br /> 1. Annual Water Monitoring Report <br /> Cc(via email): <br /> Miguel Hamarat, Climax <br /> Geoff Niggeler, Climax <br />