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S e.~T cesc~ fo <br />6.0 LONG-TERM WATER MANAGEMENT <br />BMRI has developed along-term water management plan to address the water quality issues <br />associated with the establishment of hydrologic steady-state in the vicinity of the West Pit at the <br />San Luis Project (CMLRB Permit M-88-112). The objectives of the water management plan <br />include: <br />• stopping the flow of groundwater from the backfill of the West Pit <br />• eliminating the contribution of groundwater from the backfill at the surface seep <br />• establishing the hydrologic conditions [ha[ were anticipated in TR-18 <br />• providing for the necessary management and treatment of excess flows as required <br />based on the water quality and applicable regulations. <br />This section of the document describes the water management plan that will achieve the <br />objectives of the long-term water management plan. In addition, a monitoring program is <br />described that will provide the information necessary to evaluate the performance and <br />effectiveness of the water management program. <br />The water management program consists of two phases, with the initial phase lasting <br />approximately 2 yeazs and the second phase implemented as the long-term water management <br />system. Two phases aze planned because: (1) the most important short-term goal of the water <br />management plan is to control the flow of groundwater from the West Pit to the Rito Seco <br />alluvial aquifer and (2) the most promising long-term water management option, passive water <br />treatment, requires additional field-scale pilot testing to ensure an engineering design that will be <br />effective over the range of environmental conditions at the San Luis Project. The initial phase of <br />water management is sufficiently robust to provide long-term water management if necessary. <br />Throughout both phases of the water management program, groundwater will be removed from <br />the backfill in order to reverse the hydraulic gradient between the West Pit and the Rito Seco. <br /> <br />Battle Mountain Resources, /nc. <br />p:1/002671reporrslmarchrprltrl6wtrmngrmarch.doc 63 Mnrch II, /999 <br />