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The total annual amount of water retained in the gravel product from mining activities totals <br />14.71 acre -feet. <br />In addition, an estimated 1.93 acre -feet of water per year will be used for dust control based <br />(approximately) on 3,500 gallons per day for 20 days per month for 9 months. <br />Annually the total evaporative and operational losses from mining activities (open water <br />surface evaporation, water retained in the aggregate product, dust suppression) totals 17.98 <br />acre -feet of depletion which must be augmented. All depletions were lagged to the Saint <br />Vrain River using the lagging factors approved by the State Engineer pursuant to on -going <br />Substitute Water Supply (SWSP) approvals. <br />(e) Indicate the projected amounts of the water sources to supply project water <br />requirements <br />Replacement Water: The source of replacement water for depletions will be long term <br />lease Bestway Concrete & Aggregates and Central Colorado Water Conservancy District. <br />The State Engineer must approve a SWSP every year. These approvals require that the <br />applicant provide a detailed explanation of the mining operations, a quantification of all <br />mining activities and subsequent depletions and all legally available replacement sources. <br />(� Affirmatively state that the Applicant has acquired or applied for a National Pollutant <br />Discharge Elimination System permit from the Water Quality Control Division <br />The Operator will apply for a National Pollutant Discharge Elimination System (NPDES) <br />permit from the Water Quality Control Division of the Colorado Department of Public Health <br />and Environment prior to discharging water from the site. <br />Bestway Concrete & Aggregates — The Shores -Burch Property — MLRB 112 Permit Application <br />Exhibit G - 2 <br />