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EXHIBIT D-MINING PLAN <br />Topsoil <br />The top 4 to 6 inches of material regardless of the soil content or quality will be dozed <br />into a stockpile and saved for reclamation. <br />Overburden <br />Overburden is removed and stockpiled for back-fill after mining of the area is completed. <br />Overburden depths are approximately 2 feet in the major extent of the area but reach <br />approximately 5 feet on the central knob. A degraded sandstone is the primazy material <br />on the central knob. <br />Calcine(clav) <br />Calcine, a naturally thermally treated clay, is mined by ripping with a dozer depending on <br />the hardness, then with a scraper loaded and transported to the stockpile . Stockpiles will <br />be located on the now perntitted acreage beside the existing haul road. <br />Within the nw~ing area are three knobs or hills that protrude above the terrain that is <br />sloping to the north. The top 20 to 25 feet of the knobs are composed of the calcine to be <br />mined. After mining the terrain will be devoid of the knobs but will still slope to the north <br />resulting in an irregular topography. <br />An estimated 60,000 tons of calcine is located in the designated azea and at the current <br />plant usage wiIl supply material for ten yeazs. Each stockpile will average 10,000 tons. <br />Haula e <br />Haulage from the stockpile is by truck and loading by a front end loader, Mining <br />equipment is on the mining site during the mining only. As haulage is on a demand basis, <br />the front-end loader remains on the site during any episode of hauling, usually no more <br />than three days. The existing main haul road will be used. <br />For the preceeding year, 6000 tons of this material were hauled from the Dawson mine. <br />Mining Dates <br />Mining will commence when the current azea to the west is mined out. There aze 10,000 <br />tons rema;ning to be mined. <br />Groundwater and Surface Water <br />During all previous muvngs, no groundwater was encountered or surface drainage <br />disturbed. We do not anticipate mining to such a depth that we would encounter any <br />ground water or disturb any surface water drainage patterns. We anticipate all ground <br />water will go undisturbed. <br />