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Use Type <br />Basis <br />Acre - <br />feet/yr <br />4.58 <br />Sediment Pond Evaporation <br />NOAA Evap chart <br />Gravel excavation retention <br />tonnage mined <br />10.90 <br />Dust Control - roads <br />tonnage and road use <br />14.0 <br />Asphalt Plant Crusher /Screen Plant/Wash Plant <br />historic <br />22.5 <br />Totals <br />51.98 <br />Use Type <br />Basis <br />Acre - <br />feet/yr <br />Lake Evaporation <br />NOAA Evap chart <br />259.0 <br />Totals <br />259.0 <br />annual tonnage for the project of 425,000 tons per year. Therefore, this consumptive use <br />will be 10.9 acre -feet per year. This use will only occur for the years of mining. <br />3) Evaporation will occur as a result of pumping water into the sediment pond and exposing <br />this water to the surface. Most of the water will seep back into the ground; however, the <br />surface area of the pond and sump will add approximately 1.0 acres. Using the rate <br />calculated above of 4.58 acre -feet per acre, this results in a use of 4.58 acre -feet per year. <br />4) Consumptive use for road dust control will be minor since the access road will be <br />primarily maintained with magnesium chloride and/or water as needed. Under very dry <br />conditions and high truck traffic, water may be used. This is estimated at 14.0 acre -feet <br />per year. <br />5) Consumptive use for the asphalt plant, wash plant and the screening/crushing plant dust <br />control sprays are expected to be 22.5 acre -feet per year. <br />A summary of consumptive uses is given below: <br />Scenario 1 — During Mining <br />Scenario 2 — After Mining <br />Otter Creek Pit December 12 G - <br />