2011-03-14_REVISION - M1977493 (48)

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Permit Amendment (AM-06) - Climax Mine CM0000081 exhibit. The general arrangement of the system is shown on Figure AM-06-G-02, and a schematic representation is shown on Figure AM-06-G-09. This system will continue to collect and convey impacted waters throughout the site to either the mill water system or the treatment system for eventual discharge from the site. G-3.8 Water Treatment Systems Watertreatment during Phase I Deposition will not be significantly differentthan thatdescribed forthe Current Configuration scenario. Impacted waters will continue to be collected and delivered to the SDP or will flow directly into the Tenmile TSF water pool. These waters, in addition to the supernatant from the tailing slurry, will receive first-stage treatment in either the SDP or the Tenmile TSF water pool. The high density sludge generated at the SDP will be discharged either directly into Tenmile TSF or into the tailing slurry prior to deposition. The low density sludge that is generated in the Tenmile TSF water pool is expected to be continuously inundated by the deposited tailing. The first-stage effluent from Tenmile TSF will be decanted into the Tenmile Tunnel, where excess waterthat is not required in Robinson Lake will be delivered toward Mayflower TSF. This waterwill be dosed with hydrated lime at the toe of 3 Dam and then flow into the Mayflower TSF water pool for second-stage treatment. As previously described, effluent from the Mayflower TSF water pool will be neutralized and discharged at Outfall 001 downstream of 5 Dam. G-3.9 Domestic Water Systems The current Mine Plan calls for continued use of the existing domestic water supply and storage facilities described in the Current Configuration section of this exhibit. However, changes are expected with respect to the potable water treatment system and the sanitary wastewater treatment system. New water distribution and wastewater collection lines and storage facilities will be installed in the mill area. G-3.9.1 Potable Water Treatment System The current mine plan includes the installation of a new potable water treatment system in the existing Domestic Water Treatment Plant. This treatment system will provide potable water to the various buildings in the mill area. Design and operation of this facility will be in accordance with the regulatory requirements of the Colorado Department of Public Health and Environment. G-3.9.2 Sanitary Wastewater Treatment System The current mine plan includes the installation of a new sanitary wastewater treatment facility to be located north of the Gate House. This facility will provide centralized treatment of sanitary wastewater generated within the various facilities in the mill area. The effluent from the plant will discharge into the process water treatment system. G-4 Phase II Deposition Water Management The Phase II Deposition scenario is the period of mine operations when tailing is being deposited into Mayflower TSF. From a water management standpoint, this scenario has been separated from Phase I Deposition because there are significant changes to the water handling strategy that are triggered by the resumption of tailing deposition in Mayflower TSF. G-4.1 System Overview The current mine plan calls for the deposition of 26 million tons of tailing into Tenmile TSF and the remainder, which constitutes the vast majority of future mill tailing, into Mayflower TSF. When tailing, which is circumneutral, is being deposited into Mayflower TSF, its water pool will provide first-stage treatment rather than second-stage treatment as it did during Phase I Deposition. This change will mandate the implementation of a new second-stage treatment facility. The current mine plan proposes that the Property Discharge Water Treatment Plant (PDWTP) will be constructed and placed into operation prior to the start of Exhibit G G-8 May 2010