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<br />this water to the surface. Since the wetland is normally wet, the increase in area of <br />exposed water is used to determine this consumptive use. This is approximately 3.1 <br />acres. Using the rate calculated above of 2.23 acre-feet per acre, this results in a use of <br />6.91 acre-feet per year. <br />4) Consumptive use for dust control will be minor since the access road will be <br />primarily maintained with magnesium chloride. Under very dry conditions and high <br />truck traffic, water may be used. This use is estimated at 0.3 acre-feet per year. <br />5) The portable enclosed crusher and screen plant do use sprays for dust control, <br />although the gravel will be somewhat wet after excavation from below water level, and <br />the need for additional water in the operation will be minor. Estimated use for the <br />crusher/screen plant is 2% of the annual tonnage run through the plant, which, as <br />described above will be a higher tonnage than that of this permit, 120,000 tons per <br />year. This results in an additional consumptive use of 1.76 acre-feet per wear. <br />A summary of consumptive uses is given below: <br />Use T e Basis cre-feet r <br />Lake Evaporation Evap records + precip. <br />data 9.37 <br />Gravel Excavation Evaporation Evap records, tonnage <br />mined 1.32 <br />Wetland Evaporation Evap records, area <br />exposed 6.91 <br />Dust Control -Roads Tonnage and road use 0.20 <br />Dust Control -Crush & Screen Plant Plant data and throughput 1.76 <br />Totals 19.56 <br />Therefore, of the total amount pumped from the pit of 1390 acre-feet, 19.56 acre-feet <br />will be consumptive uses as described above. The remaining amount, 1370.44 acre-fee[, <br />will enter the White River immediately north of the wetland or will seep into the <br />ground through the wetland. <br />The numbers above are for worst case consumptive use since the lake is calculated at <br />maximum surface area and it is assumed that the full mining operation will be taking <br />place at the same time. Once the operation is terminated, the only use will be lake <br />evaporation, which will be 9.37 acre-feet per year. <br />Once mining and reclamation is completed 28 to 30 months after the operation <br />commences, 4.2 acres of the original permit area will remain as a lake and the <br />