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during crushing of mined basalt. Table G-2 shows the total consumptive uses anticipated for this <br /> site. <br /> Dust Control—Disturbed Areas <br /> Water used for dust suppression is usually 100 percent depletive with no measurable return flows <br /> to the river system. The main access road into the mine is paved. Water will be used on all <br /> 5_1 other internal roads. Water will only be applied when needed at this elevation, since the cold <br /> conditions on site for much of the year result in little evaporation and/or dust. The main <br /> access road is paved to reduce the water requirements. It is assumed that watering of roads <br /> will require approximately 5000 gallons water six times a day for 150 days per year. Other days <br /> will have natural moisture on the roads or the site will be inactive since the annual production is <br /> not very high. This is equivalent to approximately 13.8 acre feet per year. <br /> Dust Control - Crushing and Screening Plant Operations <br /> 55_2 The crushing and screening plant uses roughly 9.2 acre feet per year. <br /> 5_3 Asphalt plant operation <br /> The asphalt plant requires approximately 4.0 acre feet per year. <br /> 5.4 <br /> Potable water for drinking <br /> Potable drinking water will be purchased commercially and will not be considered in the <br /> consumptive use calculations. <br /> Ralston Quarry CrM I. ir4i and Aswwttx,PL1 A' <br /> January 2019 G-7 <br />