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MINING PLAN EXHIBIT D(coNT) <br /> Once mining ends in Stage 1 it will move to Stage 2 which will be <br /> mind in 2 phases . The first will be to begin removing material <br /> from the terrace face immediately east of the Plant Site and work <br /> east and south on a elevation that is 2 feet above the ground <br /> water level in this area until the mine limits have been reached. <br /> A NEAR VERTICAL (j4:1) MINING FACE WILL ADVANCE EAST TO WEST ACROSS THE UPPER <br /> LEVEL UNTIL IT REACHES THE SETBACK LINE . Site investigations indicate <br /> the groundwater elevation under the eastern part of the mine is <br /> approximately 5072 . So that during the initial phase the floor <br /> elevation will be mined at approximately 5074 . <br /> Track-hoes, front-end loaders, haul trucks and scrapers will <br /> remove material from the working face and floor of the mine . It <br /> will be hauled or conveyored to the processing plant . <br /> A second slurry wall will be installed at the base of the <br /> excavated slope in Stage 2 to seal the lower 15 feet of the <br /> deposit so it can be mined dry . THIS SLURRY WALL WILL BE LOCATED <br /> APPROXIMATELY 60 FEET INSIDE THE PERMIT BOUNDARY ON THE NORTH , EAST AND WEST <br /> SIDES . IT WILL BE APPROXIMATELY 5, 075 feet long and have an average <br /> depth of 17 ft . Once the slurry wall is in, the second phase of <br /> mining, will begin on the eastern side of the lined area and work <br /> back to the Plans Site . As mining begins in the lined area the <br /> water trapped within the liner will be pumped into the old lake <br /> so it returns to the groundwater system. Once the bedrock is <br /> reached and adequate room is created on the east side backfilling <br /> will begin. <br /> The slurry walls will be certified and become liners to block <br /> groundwater from entering the excavation areas . This reduces the <br /> amount of evaporative loss replacement water needed during <br /> mining. This certification will be obtained as soon as possible <br /> after installation is complete. If needed, a Temporary <br /> Substitute Supply Plan will be obtained from the Office of the <br /> State Engineer prior to exposing water and will remain in effect <br /> until advised by the Office of the State Engineer that is not <br /> needed. No blasting will take place on this mine . <br /> As mining progresses across the property, additional area will be <br /> stripped ahead of the mine face and any topsoil encountered will <br /> be stockpiled along the east and south sides of Stage 2 , for use <br /> when reclamation begins . The salvaged topsoil may also be used <br />