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' E%HIBIT D (Cont'd) <br />The operator's intention is to minimize disturbances to <br />the prevailing hydrologic balance of the affected land and of <br />' the surrounding area and to the quality and quantity of water <br />in surface and ground water systems both during and after the <br />mining operation. <br />t Valco believes it is in compliance with federal and state <br /> laws and regulations governing water and water rights. There <br />' is no application of the dredge law or siltation structure <br /> removal requirement. <br />' timates an increasin <br />e <br />i <br />Ti <br />bl <br />Th <br />t <br />Mi <br />t <br /> g, <br />a <br />e. <br />e opera <br />or <br />s <br />n <br />ng <br />me <br />' although highly variable, market over the next fifteen years. <br /> Estimates are for 50,000 tons of material annually during <br />' the period 1978-1982; 55,000 tons annually in 1983-1987; <br /> 60,000 tons annually in 1988-1992, and 62,927 tons in 1993. <br />' 000 tons <br />er acre <br />osit varies between 43 <br />000 and 67 <br />The de <br /> , <br />p <br />p <br />, <br />' averaging approximately 54,000 tons per acre. Approximately <br /> one acre per year will be excavated from an average deposit <br />' thickness of twenty-two and one-half feet. The five-year <br /> stages will affect somewhat more than five acres because the <br />' slope areas around the perimeter will contain less than <br /> 54,000 tons, and there are perimeter areas in each stage which <br /> will not be mined. An estimated mining timetable is shown on <br />' the next page. Comparison of the timetable with map Exhibit <br /> D-1 will show where the operation began, where it is going and <br />' an estimate of how long it will take. <br /> <br /> <br /> 8 <br />