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<br /> <br /> <br /> <br />1 <br />t <br />1 <br />1 <br />1 <br />1 <br /> <br />The resource itself in the Creek bed has an average depth of <br />fifteen feet but mining could range between ten feet and twenty- <br />five feet. The top six inches is topsoil containing the root <br />zone of the grasses. The average depth of mat er•ial r•et ur•ned t~~ <br />the mined area due to r•e~ect materials, clays and silt is threes <br />feet. <br />In the Lowland area we expect more permanent oper•atii~ns because <br />of a high ere quality product and a larg ere investment involved ir. <br />grading ane washing of the sand. The main uses for this wash <br />product wi l l be concrete, nror•tar•, and drains. The material is <br />also suitable for• asphalt, pipe beddinq_, and r•oadbase. <br />In the mining plan we have located four Lowland processing sites <br />(Figure D-31 which are about one mile apart. Each of these sites <br />will involve eight to ten acres, (also we have located four minor <br />L~~wland plant sites (Figure D-4) between the larger sites. These <br />are sites for• smalter• operations to process nrater•iai. Most <br />likely the material will not be washed and the plant site will <br />contain from two to three acres. Figure D-5 depicts how access <br />roads will be c~~nstructed to the processing sites when a creek <br />crossing is necessary. Thls concrete rubble Po red will also serve <br />as a cutoff structure in the creek. bed to pr•e vent upstream <br />headcuttino. <br />Generally the mining will follow this sepuence: <br />1. Clear and grub the trees to be removed. <br />c. Skim the topsoil away and stockpile it out of the mining <br /> <br />1 <br /> <br /> <br />1 <br />1 <br /> <br />area in the Creek bottom. <br />3. Begin digging with a backhoe or a dragline in or•der• t~~ <br />create a pool of wat ere. 1"he mined mat er•ial will be carried <br />to the pr•ocessinp site by conveyors or trucks. <br />4. Mining will continue downstream by either dragline ore <br />suction dredge. If the sucti~~n dredge is used the material <br />can be tr•anspor•ted to the processing site by the suction <br />hose. <br />5. Excess fines, clay, silt, and re,7ect material will be <br />returned to the Creek bed thr•ouph the washing oper•at ions. <br />Settling ponds will be cleared periodically and this <br />mat er•ial will be spree ad on the exposed land above the mining <br />pond. <br />6. The mining pond will 6e approximately twenty acres in size <br />and will move downstream with the nrl Wing. <br />n - ~ <br />