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The site will mine the Quaternary sand and gravel deposit found in the San Luis Valley derived <br /> from alluvial fans draining the Sangre de Christos Mountains to the east. Groundwater is <br /> encountered>100 feet below the undisturbed ground surface in undifferentiated alluvial aquifers <br /> of the San Luis Valley. It is not expected that groundwater will be encountered during any phase <br /> of mining. <br /> 3. Water Consumption for the Operation and Water Rights <br /> Groundwater is unlikely to be encountered during any phase of mining at the King Pit; however, <br /> a Substitute Water Supply Plan(SWSP) is in place due to requirements dictated by Alamosa <br /> County. Because the alluvial gravel to be mined is dry, no water losses will occur from the <br /> gravel resource during mining. <br /> Dust will be controlled by water. Water will be used as needed to spot eliminate any problem <br /> dust areas. 0.5 acre-feet per year will be allocated to dust control, or 0.04 acre-feet per month. <br /> Any water required for dust mitigation will be purchased and brought on site by an independent <br /> operator. <br /> Therefore, total annual depletions for the gravel mining operations are estimated to not exceed <br /> 0.5 acre-feet per year. <br /> King Pit <br /> reR l.e»rcti aad Asxociatcx Pl.i,{' <br /> February 2018 G-2 <br />