Substitute Water Supply Plan Forum September 1 2004

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The pre -81 credit can only be credited against depletions from evaporation. Credit cannot be taken for surface area that was exposed for reasons other than sand and gravel mining_ 10.E Water consumption by the gravel operation including, but not limited to, dust control, water removed with the mined product, and reclamation irrigation must also be determined. The matrix below specifies the percent of product mined which is considered water weight. 0 washed) by weight is All water diverted from the pit shall be measured. All diversions, including water for dust control and irrigation for vegetation establishment, shall be considered 100% consumptive unless it can be documented otherwise. Note: the percentages are by weight 11. The nlan shall specifically address whether dewatering will occur at the site. If the site will be dewatered, the expected rate and volume of dewatering must be specified along with the lagged depletions which will occur due to the dewatering process. The applicant is responsible for replacing all out of priority depletions caused by the dewatering operation. Accretions that may occur at the beginning of the dewatering operation may be claimed as credit to offset depletions that occur due to the mining operations and the dewatering process, if applicant can account for these accretions. The credit can only be claimed for mining depletions that occur within the mining permit boundaries. All site dewatering must be accounted for in a method satisfactory to the division engineer and water commissioner. Adequate measuring devices may be required in order to adequately account for the dewatering. If dewatering is occurring at the site, the gravel pit well permit application must specifically specify dewatering as a use. Not Washed Washed Material mined above the Material has 2% moisture Material has a 4% moisture ground water table content, but 0% is charged content (saturated), but 2% because the moisture is not a is charged because 2% is ground water diversion from the soil profile and 2% is from ground water used for washin Material mined below the Material has 4% moisture Material has 4% moisture ground water table content (saturated), and 4% content (saturated), and 4% is charged because all of the is charged because all of the water is a ground water water is a ground water diversion diversion coaxed out at 4% Material mined below the Material has 2% moisture Material has 4% moisture ground water table, but in a content, and 2% is charged content saturated), and 4% dewatered state because the moisture is from is charged because all of the a ground water diversion water is a ground water diversion Note: the percentages are by weight 11. The nlan shall specifically address whether dewatering will occur at the site. If the site will be dewatered, the expected rate and volume of dewatering must be specified along with the lagged depletions which will occur due to the dewatering process. The applicant is responsible for replacing all out of priority depletions caused by the dewatering operation. Accretions that may occur at the beginning of the dewatering operation may be claimed as credit to offset depletions that occur due to the mining operations and the dewatering process, if applicant can account for these accretions. The credit can only be claimed for mining depletions that occur within the mining permit boundaries. All site dewatering must be accounted for in a method satisfactory to the division engineer and water commissioner. Adequate measuring devices may be required in order to adequately account for the dewatering. If dewatering is occurring at the site, the gravel pit well permit application must specifically specify dewatering as a use.