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MINING PLAN EXHIBIT D(CONT) <br /> Site preparation will begin in Stage 1 on the southwestern part <br /> of the permit area. Once the area has been cleaned of trees, <br /> buildings and other rubbish, a slurry wall will be constructed <br /> around the area to be mined. This will serve to block ground <br /> water from entering the mining area to reduce the exposure of <br /> ground water and allow the area to be mined and backfilled as a <br /> dry site . The estimated length of the Stage 1 slurry wall will be <br /> 2270 feet and when keyed into bedrock will average 28 feet deep . <br /> In addition, a Plant Site/Stockpile area will be graded on the <br /> east side of the existing lake and the access roads will be <br /> improved to facilitate hauling from the site . Once these areas <br /> are completed mining will begin on the west side of Stage 1 and <br /> all material will be hauled to the Plant Site or stockpiled on <br /> the west end of Stage 2 above the Plant Site until it can be <br /> processed. This will create a hole that will be used as a <br /> siltation pond for wash water recycling for the life of the mine . <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 /> Site investigations indicate the groundwater elevation under the <br /> eastern part of the mine is approximately 5072 . So the during <br /> the initial phase the floor elevation will be mined at approxi- <br /> mately 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 exca- <br /> vated slope in Stage 2 to seal the lower 15 feet of the deposit <br /> so it can be mined dry. This slurry wall length will be 5075 <br /> feet long and have an average depth of 17 ft . Once the slurry <br /> wall is in, the second phase of mining will begin on the eastern <br /> side of the lined area and work back to the Plans Site . As <br /> mining begins in the lined area the water trapped within the <br /> liner will be pumped into the old lake so it returns to the <br /> groundwater system. Once the bedrock is reached and adequate <br /> room is created on the east side backfilling will begin. <br /> 8 <br />