2011-03-14_REVISION - M1977493 (48)

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• Permit Amendment (AM-06) - Climax Mine G-1 Introduction CM0000074 The management of water at the Climax Mine is critical to the operation of the site and to maintain compliance with permits and regulatory requirements. For many years, significant resources have been directed toward the development of water handling and treatment systems. The configuration and operation of these systems are described in this exhibit. Also described are the current conceptual plans for development of the water handling systems through the various phases of mine operations including reclamation and closure. Because the handling of tailing is intricately related to the water systems at the site, a description of the development plans for the tailing delivery and deposition facilities are also included. By reference from other exhibits, water handling associated with the Mine Plan and Reclamation Plan is discussed herein. Water management at the Climax Mine site includes a variety of systems, each designed to perform a specific function or set of functions. These systems include: • Mill water supply system, ¦ Tailing slurry delivery systems, ¦ Impacted water containment and collection systems, ¦ Impacted water treatment systems, • C? J ¦ Fresh water interceptor and bypass systems, • Domestic water systems, ¦ Stormwater management systems, and ¦ Flood control and protection systems. The primary functions of the various water systems include: ¦ Supplying the necessary water to the Mill for operation, ¦ Delivery and settling of tailing materials, ¦ Maintaining the pond levels within prescribed dam operation and safety limits, ¦ Releasing and store water in accordance with the decreed water rights, ¦ Minimizing impacting fresh waters on the site, ¦ Diversion of fresh water into the system when necessary, and ¦ Discharge treated water off the property in accordance with the National Pollutant Discharge Elimination System (NPDES) permit. At the Climax Mine, process water is broadly defined as the waters that occur below the fresh water interceptor system, may be used as part of reclaim mill water for processing molybdenum, have come in contact with mine tailing or mine waste rock, and require treatment prior to discharge into the natural stream system (.e. Tenmile Creek). Process water also includes precipitation runoff below the interceptor system that mixes with impacted waters and must therefore also be treated prior to discharge. The process water system is made up of a complex network of water storage, reclaim, and conveyance facilities and is summarized in subsequent sections of this exhibit. The presentation of the development and operation ofthe water systems atthe site has generally been divided into phases defined by the mineral production conditions at the mine. The first phase is the Current configuration, which corresponds to periods of non-mineral production. The mineral production scenario is divided into two phases, including Phase I Deposition when tailing is being deposited in the Tenmile Tailing Storage Facility (TSF) and Phase II Deposition when tailing is being deposited in Mayflower TSF. The final phase described herein is the closure scenario. Significant effort has been made in the preparation of this exhibit to present a system that is operationally and economically feasible. However, it is expected that refinements, improvements, and deviations will be made in the future to the system described herein. Depending upon the magnitude of these changes, and if Exhibit G G-1 May 2010