PERMFILE100569 - Laserfiche WebLink

Home Browse Search

• Revision #1 - Pege IS of30 3) The operator shat! provide an estimate of the project water requirements including flow rates and annual vo/umes for development, mining and reclamation phases ojthe project. During sand and gravel mining operations, the site will need to be dewatered to access all of the sand and gravel. The groundwater collected within the mining azeas will be pumped into the Canning Factory Ditch, which is located north of G Road. This ditch is owned and operated by the Gtand ]unction Drainage District. M approval letter from the Drainage District has been included in Exhibit G. The groundwater will be pumped from the mining operations using pumps with a discharge capacity of around 4 cubic feet per second, during the mining of the sand and gravel, and for a portion of the backfill placement. On a yearly basis, the applicant estimates it will require 30 days for removal of the sand and gravel, and 60 days for backfilling. Therefore, on a yearly basis, the applicant may discharge approximately 227 million gallons of groundwater into the Canning Factor Ditch, which flows into the Colorado River. Water collected within the mining pi[ will also be used for dust control within the project site. This could amount to as much as 7,000 gallons per day. Water for landscaping along G and 23 Road will require a drip irrigation system, with the water supplied by an existing domestic water main line located in 23 Road. This landscaping could amount to 260 gallons per day during the spring, summer and fall months. Reclamation plantings for the site will not require an irrigated water source. 4) The operator shall indicate the projected amount from each ojlhe sources of water to supply the project water requirements jor mining operation and reclamation Water collected within the pit will also be used for dust control within the project site. This could amount to as much as 7,000 gallons per day. Water for landscape screening along G and 23 Road will require a drip irrigation system. This could amount to 260 gallons per day during the spring, summer and fall months, and will be supplied Gom an existing water main located adjacent to the project site. No irrigated water source will be requ'ved for reclamation on the site. The revegetation seed mix will be planted during the wet spring or fall planting seasons. Natural moisture will be used to establish and maintain the vegetation. 5) The operator shall a~rmativety state that the operator has acquired (or has applied jor) a National Pollutant Discharge Elimination System (NPDES) permit from the Water Quality Control Division at the Colorado Department of Health, if necessary. The operator will obtain all necessary NPDES permits prior to any sand and gravel mining work.