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<br />Yi'ater Requirements <br />Ground water will be consumed by four processes: evaporation, water in the product, washing, and <br />dust control. The consumption of ground water will result in depletion from the Boulder Creek <br />system. <br />Evaporation will occur from exposed ground water on the site. Water will be exposed in the <br />dewatering trenches and two small ponds. We estimate the total water surface azea will not exceed 2 <br />acres during the mining. The evaporation from the 2 acres will be approximately 5 acre feet per <br />year. <br />The amount of water retained in the product is estimated at 4`k by weight. Based on a maximum <br />production of 500,000 tons per yeaz the amount of water consumed is approximately 14.7 acre feet <br />per yeaz, <br />The washing will require approximately 1400 gallons per minute. Water consumed by washing will <br />be accounted in the product wazer or evaporation from the sedimentation ponds. <br />Water will be used to control dust on interior haul roads as needed. We anticipate that approximately <br />80,000 gallons per month will be required, or 1.2 acre feet per yeaz. <br />In summary the total estimated water consumption during the mining is as follows: <br />Type of Use Annual Consumption <br />(acre feet) <br />Evaporation 5.0 <br />Product and wash water 14.7 <br />Dust control y <br />Total 20.9 <br />ZO <br />K~A <br />