2002-08-23_REVISION - M1983033 - Laserfiche WebLink

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EXHIBIT D MINING PLAN (CONT) AM89USD APRIL 2002 negates Amendment #3~1985~, that allowed backfilling in the ravine. As the new road is constructed the fill will be removed and used in the mine for reclamation. To build this road a corridor, 1:1 slope from the road surface up onto the surrounding hillsides will have to created as explained in the Reclamation Plan. The cross hatched area on the Mining Plan Map shows the limits of the disturbance area, the road surface is shown as a dashed line and the perimeter line is the top of the graded slope. The disturbed area covers approxi- mately 3.28 ac. ±. The benches will be 10 foot high by 10 foot wide to create a stable slope along the road. To accomplish this, we will begin to remove material from the mine side of the road cut and work south along the proposed route. As the road progresses, the side slopes will be created and the waste rock will be removed to the mine area where it will be processed. The excavated benches will be resoiled and planted with native grasses and shrubs during each phase of lowering the road. Initially the road will be steeper than the 78 from the highway to the saddle midway thru the road corridor. This will create a rather steep road for the first 300 feet and then level out so it enters the quarry at the existing floor elevation. It is estimated the road will be started nearly 80 feet above its final height when construction begins. As the mine develops the road will be gradually lowered so it enters the mine at the same level as the floor. This lowering will continue until the final mine floor elevation is established. During this time dust control agents such as magnesium chloride will be used on the road to control dust. The road, when finished, will be 60 feet wide and have a 78 slope so it is easily traversed. Amendment # 9 - SHOP BUILDING ADDITION B (Revised 8/19/02)