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<br /> <br /> <br /> <br /> <br />1 <br /> <br /> <br />1 <br />1 <br /> <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br />B. Earthmoving <br />Earthmoving will be accomplished by several different machines, each <br />for different purposes. A scraper will be used to strip topsoil and over- <br />burden and to relocate it to screening mounds and stockpile areas. A dozer <br />will aid in clearing operations where necessary, will serve to relocate <br />small trees, and will be used for moving sand and gravel stockpiles. <br />The permit area is divided into four stages for mining operations. <br />The Stage I area is located immediately south of St. Drain Creek and con- <br />tains 35- 40 acres. Based on an average sand and gravel deposit thickness <br />of 12 feet, there is approximately 720,000 cubic yards or 1.3 million tons <br />of material. Operations are expected to proceed at an annual extraction <br />rate of 200,000 tons. The resulting lifetime for Stage I is about seven <br />years. The following table summarizes this information for Stage I and <br />the other three stages: <br /> STAGE I STAGE II STAGE III STAGE IV <br />Area, acres 37 47 27 66 <br />Overburden, cubic yards 180,000 226,700 177,200 317,800 <br />Deposit, cubic yards 720,000 906,700 708,900 1,271,100 <br />(Tons) (1,30,000) (1,650,200) (1,290,200) (2,313,400) <br />Lifetime, years 7 9 7 12 <br />NOTES: Density of sand an d gravel is approximately 135 pound/cubic foot. The <br />County anticipates to remove 200,000 tons per year. <br />C. !Dater tianagement <br />There will be no water diversion or impoundment structures necessary <br />for this operation. The excavated areas will fill with groundwater, collect <br />water which drains from the excavated material and collect storm water runoff. <br /> <br />