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3. Groundwater <br /> No groundwater will be interacted with by this operation. In the event that groundwater is <br /> encountered during mining, mining will cease in the area and the pit will be filled with at least 2 <br /> feet of overburden to cover any and all exposed groundwater. <br /> 4. Water Consumption for the Operation and Water Rights <br /> Water consumption for the Tower Pit will fall into four main categories. Water supply will either <br /> be by purchasing from the Colorado River Conservancy District or directly bought from the <br /> Town of Gypsum. Total anticipated water use is expected to be 16.47 ac-ft per year. <br /> 4_1 Control Dust <br /> Water application for dust control will take place at least four times a day over all disturbed <br /> areas. Active stockpiles and others may require additional watering to ensure material stays wet. <br /> Alternatively, the operator may apply magnesium chloride to disturbed areas instead of watering. <br /> It is also assumed that additional watering will be needed during very dry windy conditions <br /> during mining operations. The facility manager will determine when and where this is needed <br /> during operations. <br /> The crushing/screening plant uses water to control dust with water sprays and on the screen deck. <br /> It will also have sprays at the entrance. <br /> This will consume an anticipated 10.43 ac-ft of water a year. <br /> 4_2 Wash Plant Operations <br /> The wash plant will be used to remove fines from the material. <br /> Wash plant water recycling will produce fines in the bottom of the wash ponds adjacent to the <br /> plant. These ponds will be inspected monthly for capacity. Fines will need to be removed <br /> periodically from the wash ponds. The frequency of this clean out will depend on production <br /> rates and how"dirty"the raw gravel is at any time. Fines removed from the wash ponds via <br /> cleanout will either be sold as a product or mixed in with the backfill in the pits. These fines will <br /> never be placed outside of an area that has stormwater controls. <br /> Tower Pit Gn{ lA•w c6 and�sxK alr PI Lf' <br /> October 2018 G-5 <br />