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inadvertently destroyed and Climax is in the process of procuring and installing a new pressure <br />transducer. This will allow for continuous monitoring of the lake level with high -level alarms to notify <br />operators if actions under the Robinson Lake Operations Plan need to be taken. <br />- Is there a projected completion date for the Robinson Lake Pump Station and the automated water level <br />monitoring system? Will the water level data from the automated system be recorded, and if so at what <br />intervals? These records should be maintained for review upon request. <br />Construction of the Robinson Lake Pump Station is essentially complete and crews have begun the <br />commissioning process. The pump station is expected to be fully functional by the end of January 2012. <br />The pump station is equipped with a pressure transmitter on the intake header, which provides an <br />indication but not a true measurement of the lake level. The pressure transducer inside the lake will <br />provide a more accurate lake level reading and will signal alarms at the control room in the mill if the lake <br />level exceeds certain trigger levels. Climax is currently working to establish the alarm criteria, which will <br />include a high -level alarm at elevation 10,882. Climax will establish a recording plan for the lake level <br />data, which will be made available upon request. <br />Tailings Storage Facilities (TSFs) <br />- What types of stability monitoring are done on tailings dams 1, 3 and 5? Is there an approved stability <br />monitoring program with trigger levels and potential corrective actions currently in place? If so, please provide <br />a copy of this plan in the EPP. Are the results of any current stability monitoring recorded and available for <br />review? <br />Similar to the OSF Operations and Monitoring Plan, the final review of TSF designs and operations and <br />monitoring requirements are in development. Climax expects to have these completed for the Tenmile (3 <br />Dam) TSF in January 2012 and for the Mayflower (5 Dam) TSF later in the year. Consistent with previous <br />commitments made in Climax's response to DRMS comments on Amendment AM -06, this information will <br />be submitted prior to resuming full -scale tailing deposition at each facility. <br />Climax's parent company, Freeport- McMoRan Copper & Gold, has an internal Tailings Stewardship <br />Program that is directed by an inter - disciplinary group comprised of company management, internal <br />technical experts and operators along with technical expert consultants, who are tasked with operations <br />and management of TSFs to ensure stability. The Tailing Stewardship Program conducts annual detailed <br />field inspections of the active TSFs, which includes inspections, training and reviews of operational <br />issues, phreatic level trends, deposition plans, hydrologic controls, seepage management, decant <br />system, structural integrity and stability evaluations. Freeport maintains a strong corporate commitment to <br />the safe operation of tailing dams at all of its facilities and will maintain a robust monitoring program at <br />Climax. <br />At Climax, the stability of existing dams (currently inactive) is monitored through regular visual <br />observation of the dams, recording and reviewing piezometric elevations on regular intervals, and annual <br />inspections by the Engineer of Record (URS Corporation). Piezometric water levels are typically <br />recorded on a weekly basis, and the data is reviewed by URS Corporation, generally on a semi - annual <br />basis. Once active deposition resumes, monitoring will increase in frequency. <br />6 <br />