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EXHIBIT D MINING PLAN ~CONT) <br />problem with surface water entering or leaving the existing site <br />since mining began in 1993. We do not expect this to be a <br />problem and the proposed sloping plan for the excavated area <br />should eliminate any concerns of erosion occurring on the site. <br />We have not experienced any unusual dust control problems on <br />the site to date. One can only estimate the amount of water <br />needed for dust control at this time, but since there is no water <br />on the site we will be hauling it into the site from a source <br />approved for that use. Most of the water used for dust control <br />will be used on haul roads. On a typical operation of this type <br />we may use 3 to 5 ac-ft per year. Please refer to EXHIBIT G-WATER <br />(1993) for the discussion of how water will be used at the site. <br />There are no ditches crossing the site and no surface or <br />subsurface water will be impacted by the mining operation. All <br />interior pit slopes will be maintained with a pit-ward attitude <br />so that historic drainage patterns can be maintained. This same <br />slope management plan will prevent any offsite slides or other <br />disruptions. This site is at the upper end of the runoff drain- <br />age on the edge of the escarpment and we have not had a problem <br />with Stormwater entering the site nor have we noted any dis- <br />charges leaving the site. No U.S. Army Corps of Engineers, 404 <br />permit is necessary, as there are no water bodies on the site nor <br />are there any wetland areas. <br />AMENDMENT 2 - Revised Mining Timetable <br /> ACRES <br />AREA1 YEARS TOTAL MINED MINING SLOPE <br />EXISTING (WEST) 0-1 21.31 19.97 17.21 2.85 <br />NEW (EAST) 15-20 11.60 9.73 7.09 2.64 <br />TOTALS 32.91 29.70 24.30 5.49 <br />5 <br />