2018-04-13_HYDROLOGY - M1990094 - Laserfiche WebLink

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Y pr a DE 1C 3 L '90 WATER KwUUKG&S STA1ED1 REVISED EXHIBIT A 9. Detailed description of use and method of diversion: a. Evaporation from a maximum lake area of 17 acres will be 78.07 acre feet per year (17 acres times 4.59 acre feet per acre, gross lake evaporation) . The pit will be dewatered during mining operations, with the water being discharged to ditches on the property which drain into an abandoned gravel pit an neighboring property. This will not increase the evaporation losses from the pit; the evaporation will merely occur at another location. The dewatering will be accomplished by pumping at a maximum rate of 1500 gallons per minute. b. For the sixty days per year the pit may require dust suppression, it is estimated that dust suppression requirements will be 10,000 gallons per day, or 1.84 acre feet per year. The water will be pumped from the pit at a maximum rate of 1500 gallons per minute. c6 An estimated average maximum of 100,000 tons of product will be mined per year. Assuming a product moisture content of 4 percent, there will be a resulting water use of 2.94 acre feet per year associated with the product removed from the pit. i d. The total water usage from all of the above listed activities will be 82.85 acre feet per year. These activities will be conducted in connection with the mining of sand, gravel, and related products, and with the reclamation of the land during and after completion of the mining activities. e. The pumping referred to in Paragraphs a. and b. , above, will be conducted using one or more temporary portable pumps placed on the rim or banks of the pit. A hose will be extended from the pumps) to the water in the pit, to allow such water to be pumped from the pit for dewatering purposes and for dust suppression. No pumps will be permanently installed in or around the pit, nor will concrete rings or other permanent pumping structures be installed.