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Hydrologic Balance <br />The Camenish Borrow site will be dewatered prior to excavation of sand and <br />gravel. Once all material has been excavated the perimeter of the excavation will be <br />sealed with a compacted liner thereby eliminating any further depletions to the <br />surrounding alluvial aquifer. Impacts to the existing hydrologic balance will be <br />minimized by the limited duration of the dewatering operation and by the fact that the <br />excavation will be sealed immediately after all borrow material has been excavated. In <br />addition, there aze no known ground water wells within 600 feet of the proposed <br />excavation site. Finally, an adjacent dry sand and gravel mining operation located <br />immediately west of the site has been actively dewatering the alluvium in this azea for <br />several years. <br />Surface Water Management <br />All borrow areas will drain internally, Uncontrolled releases of surface water and <br />sediment from the borrow site will not occur. Stormwater collected in the open pit will be <br />managed in accordance with Colorado/NPDES discharge permit requirements. Sediment <br />generated from localized storm water runoff and surface drainage will be contained on <br />site in azeas created by the proposed mining operation. <br />Disturbance Areas <br />Disturbance areas associated with the Box Elder Creek Sand Pit aze estimated as <br />follows: <br />Disturbance Area Acres <br />Stage 1. 25 <br />Temporary Overburden and Topsoil Stockpiles <br />Total Project Disturbance (Mining) 25 <br />Total Permit Area <br />30 <br />The maximum azea that will be disturbed at any point during the operation will be <br />approximately 30 acres, <br />