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<br />2. Estimate project water requirements including flow rates and annual volumes for the <br />' development, mining and reclamation phases of the project. <br />We aze in the process of completing a Temporary Substitute Supply Plan and Well Permit <br />' application for the site, We will forward complete calculations of water requirements after <br />we have submitted the Temporary Substitute Supply Plan to the State Engineer for review. <br />' Depletions During Mining <br />Water depletions during mining will include: 1) evaporation losses from the dewatering <br />trench; 2) water lost through operations including washing and dust control and 3) water <br />lost with the material hauled off-site. <br /> 1) Evaporation Losses <br /> Note that NCCI is mining the site in phases (see attached Mining Plan Map) to <br /> minimize the amount of land and water disturbed at any one time. Before any mining <br /> begins, the operator will install a dewatering trench around the azea to be mined to <br />' control groundwater. Approximately 90 days before a phase has been completely <br />mined, the operator will begin installing a dewatering trench in the subsequent phase. <br /> The amount of exposed groundwater will vary, depending on what phase is being <br />' mined. Evaporative loss calculations will be included with the Temporary Substitute <br />l <br />Plan <br />Su <br /> y <br />. <br />pp <br />' 2) Water Lost Through Operations <br />Wash Pond Evaporation <br />The wash pond will be about 4 acres in size. <br />Dust Control <br />' NCCI will apply water to haul roads and stockpiles as necessary to prevent fugitive <br />dust. It is estimated that one load from a 3,000-gallon capacity water truck twice a day <br />(Monday through Friday) for nine months is required for dust control. <br />' 3) Water Lost with the Material Hauled OtT Site <br />NCCI estimates they will mine 400,000 tons of material annually. It is anticipated that <br />mining will begin in the winter of 2001 and it will take 8 to 10 yeazs to remove the <br />material and reclaim the site. Annual production will depend on the demand for <br />construction material and may impact the total life of the mining operation on the site. <br />' NCCI Mining Proposal jor the NCCI Ptt ~ ! - MLRB I llPennit <br />25 <br />1 <br /> <br />