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112 APPLICATION PAGE 20 OF 35 <br />• <br />3) The operator shall provide an estimate of the project water requirements including flow rates and annual <br />volumes for development, mining and reclamation phases of the project. <br />During sand and gravel mining operations, the site will need to be dewatered to <br />access all of the sand and gravel. The groundwater collected within the mining areas <br />will be pumped into the 33 Road Ditch which is located west of the project area. This <br />ditch is owned and operated by the Grand Valley Drainage District. An approval letter <br />from the Drainage District has been included in Exhibit G. The groundwater will be <br />pumped from the mining operations using pumps with a discharge capacity of <br />approximately 4 cubic feet per second, during the mining of the sand and gravel, and <br />for a portion of the backfill placement. On a yearly basis, the applicant estimates it will <br />require 30 days for removal of the sand and gravel, and 60 days for backfilling. <br />Therefore, on a yearly basis, the applicant may discharge approximately 227 million <br />gallons of groundwater into the 33 Road Ditch, which flows into the Colorado River. <br />Water collected within the mining pit will also be used for dust control within the project <br />site. This could amount to as much as 7,000 gallons per day. <br />Reclamation plantings for the site will not require an irrigated water source. <br />4) The operator shall indicate the projected amount from each of the sources of water to supply the project <br />water requirements for mining operation and reclamation <br />Water collected within the pit will also be used for dust control within the project site. <br />• This could amount to as much as 7,000 gallons per day. <br />No irrigated water source will be required for reclamation on the site. The revegetation <br />seed mix will be planted during the wet spring or fall planting seasons. Natural moisture <br />will be used to establish and maintain the vegetation. <br />5) The operator shall affirmatively state that the operator has acquired (or has applied for) a National <br />Pollutant Discharge Elimination System (NPDES) permit from the Water Quality Control Division at the <br />Colorado Department of Health, if necessary. <br />The operator will obtain all necessary NPDES permits prior to any sand and gravel <br />mining work. <br />0