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JUSTIFICATION AND PURPOSE <br /> The justification for construction of the new pumping system is based on three key <br /> items. <br /> 1) The new pumping system would replace the aging Robinson Pump <br /> Station and pipeline that is currently used to deliver process water <br /> from the Eagle River basin to the Tenmile Creek basin. The <br /> proposed system would be located entirely within the process water <br /> system. <br /> 2) The new system is a key element of the proposed cleanup of <br /> Robinson Reservoir. In order to facilitate the cleanup of the <br /> reservoir, a system is required to isolate and remove subdrain and <br /> seepage flows from the proposed seepwater collection pond. The <br /> subdrain and seepage flows would be delivered to the Tenmile Creek <br /> basin for treatment and release to Tenmile Creek, or for use as <br /> make-up water in the mill circuit. The new system would also <br /> replace the existing pump station in terms of controlling the water <br /> level rise in the reservoir caused by snowmelt. <br /> 3) The existing Robinson pumps are 600 horsepower. The proposed <br /> new vertical turbine pumps will be 300 horsepower. Therefore, <br /> there is an opportunity for savings in electrical power costs, <br /> particularly during non-production periods when it will not be <br /> necessary to lift the water up to the mill water tanks. <br /> The primary purpose of the new pumping system, as stated above, will be to deliver <br /> subdrain and seepage flows from the proposed seepwater collection pond over to the <br /> Tenmile Creek basin. However, the new system must also be designed to perform <br /> additional functions which include controlling the water level in Robinson Reservoir to <br /> prevent process water from entering Eagle Park (prior to the proposed clean-up of the <br /> reservoir), and providing make-up water to the process water system during production <br /> periods. The primary functions of the new pumping system will change somewhat as the <br /> configuration of the overall water handling system at the Climax Mine is modified. These <br /> expected changes in the overall water system that were considered include the cleanup of <br /> the Eagle River basin (Eagle Park and Robinson Reservoirs), and the various operating <br /> 2 <br />