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EXHIBIT D - MINING PLAN NARRATIVE <br /> The permit area is 180+ acres in size and will be excavated to <br /> provide sand and gravel . The depth of the resource is <br /> approximately 301 . Other properties in the area have been mined for <br /> sand and gravel, mostly by Cooley. This operation is the next <br /> logical continuation of the mining by Cooley in the area . <br /> Cooley is presently mining the property across 88th Avenue under <br /> permit M-89-066 . That permit was amended to include construction <br /> of the conveyor line from that property across this one north to <br /> the main processing plant . This mining of property south of 88th <br /> Avenue is nearing completion, and this operation will proceed to <br /> the north. This operation is expected to be undertaken within one <br /> year, and will last from five to ten years . <br /> The end use for most of the property will be a water storage <br /> reservoir enclosed within a slurry wall (Areas 2A, 3 , 4, and 5) . <br /> Within the slurry wall, the active mining area will be dewatered <br /> prior to mining, and temporary dikes may be installed as necessary <br /> to ease pumping the active area dry from rainfall . <br /> The portions of the property (Areas 1 and Area 2B) , that is not <br /> within the slurry wall, will not be sealed off from surrounding <br /> • groundwater . The areas not enclosed by the slurry wall will be <br /> mined wet . The appropriate permission from the Colorado Division <br /> of—Water Resources and/or Water Court will be obtained for a <br /> temporary augmentation plan for evaporative losses . <br /> Area 1 and parts of Area 2B will be backfilled with sand spoils <br /> • after mining. If any permanent lake is left on part of Area 2B, a <br /> permanent augmentation plan will be prepared and followed in <br /> accordance with approval from the Colorado Division of Water <br /> Resources and/or Water Court . <br /> Water discharge from areas within the slurry wall, will be pumped <br /> • to either two small lakes along 88th Avenue that Cooley also owns, <br /> to the Bull Seep Ditch which traverses a portion of the property, <br /> or into the South Platte River where a current active and approved <br /> NPDES discharge permit exists . Permission from the owner of the <br /> Bull Seep Ditch (Fulton Ditch Company) will be obtained if the <br /> water is discharged to the Bull Seep Ditch. <br /> • <br />• <br />