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Dust will be controlled by both magnesium chloride and water. Water will only be used to spot <br />water between applications of magnesium chloride in order to eliminate any problem dust <br />areas. 3.0 acre-feet per year will be allocated to dust control, or 0.25 acre-feet per month. <br />Total annual depletions from the gravel mining operations are estimated to be 13.16 acre-feet <br />per year during the mining phase. <br />2.After Mining <br />Once mining has completed, the only loss will be an evaporative loss from the exposed water <br />surface which the gravel mining operation creates. The tables on the following pages show the <br />actual calculations of the depletion for both gravel pit lakes. The northern lake is called the <br />United Lake and the southern lake is called the Jutten Lake. <br />The water surfaces aze 26.0 acres for the United Lake and 17.7 acres for the Jutten Lake for a <br />total exposed water surface at the Colona Pit of 43.7 acres. <br />Credits <br />The Colona Pit property (United owned portion) possesses senior water rights in the Ouray Ditch <br />which will be used to replace water which is consumed in the mining operation or through <br />evaporation when mining has completed. No augmentation pond will be installed. <br />Since the entire Colona property will be dried up and irrigation will no longer take place, a <br />portion of the water rights present will be converted to industrial use during the mining phase <br />and recreational and wildlife use upon completion of mining. <br />Colona Pit November 06 G-5 <br />