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Two scenarios exist for the consumption of water associated with the mining and reclamation of the <br /> Birdseye Pit: <br /> 4_1 During Mining <br /> During the mining phase losses will occur in three areas: <br /> 4.1.1 Below Water Table Mining <br /> Depletions for moisture lost in the mined material is calculated to be 4% of the material mined <br /> below the water surface level. It is estimated that 50,000 tons of material will be mined below the <br /> water table per year. It is calculated that moisture will be lost in the mined material in the amount of <br /> 1.5 acre-feet per year. <br /> 4.1.2 Gravel Washing <br /> Depletions for gravel washing operations are calculated to be 750 gallons per day based upon <br /> previous experience. It is expected that the gravel washing operations will be in operation a <br /> maximum of 52 weeks per year and 5 days per week. This would result in a consumption of 6.2 <br /> acre-feet per year. <br /> 4.1.3 Dust Control <br /> Dust will be controlled by both magnesium chloride and water. 3.0 acre-feet per year will be <br /> allocated to dust control. <br /> 4.1.4 Total Depletions During Mining <br /> Total annual depletions from the gravel mining operations are estimated to be 10.7 acre-feet per <br /> year during the mining phase. <br /> Birdseye Pit (.n• i cwicki and ks,ociate,,N L( <br /> June 2019 G-3 <br />