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<br /> <br /> - ~'iI~dING PLAN <br />EXHIBIT 1 <br /> ~ <br />5 <br /> The objective of mining in the riprap quarry is to provide <br />' riprap material for construction of the Windy Gap diversion <br /> dam. The material will be used during the construction <br /> period to stabilize banks adjacent to the river and in <br /> construction of coffer dams, temporary diversions, and other <br /> temporary facilities. Riprap material will also be used <br /> during final construction of the Windy Gap diversion dam to <br /> cover surfaces exposed to flowing and impounded water. <br />' <br /> MINING METHODS <br />' The area to be mined consists of fractured basalt. Removal <br /> of the material will require the use of explosives to loosen <br />' the material. The material may be moved on site utilizing <br />bulldozers, front loaders or power shovels. Riprap will then <br /> be loaded onto trucks for hauling to the diversion dam area. <br />' It is anticipated that mining operations will begin at the <br />southerly limits of the previous quarrying operations and <br />proceed in a southerly direction. In accordance with the <br />' mining plan shown in Figure C-2, the maximum area to be <br />disturbed with existing operations would be approximately 7 <br />acres. Waste materials from the mining operations would be <br />' stored within the disturbed area. Materials mined would be <br />removed via the county road on the northern boundary of the <br />riprap quarry area. <br />' WATER IMPOUNDMENT AND DIVERSION <br />No impoundment or diversion of water is anticipated as a <br />result of mining operations in the riprap quarry area. The <br />working areas will be drained to the north and away from the <br />tributary to Willow Creek located on the westerly side of the <br />riprap quarry area. There should be no direct discharge to <br />the Willow Creek tributary as a result of this plan. <br />' TIMETABLE <br />' Table D-1 shows the estimated timetable for developing and <br />utilizing the riprap quarry area. It is anticipated that <br />topsoil removal would begin in July or August of 1981, and <br />' mining operations in August or September of 1981. Mining <br />operations will continue on an as-needed basis thorugh August <br />of 1984. In September of 1984 the reclamation plan described <br />in Exhibits E and F would be implemented. It is possible that <br />D-1 <br />