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• <br />will begin in 1979 and mining will be completed between 1986 <br />and 1992 in the following stages. <br />No. of Direction <br />Stage Location Acres of Mining Years <br />1 North of river, Area 2.4 north to south 1979-80 <br />5 <br />2 dewatering trench, 43.6 circwnference 1979-83 <br /> Area 3 <br />3 northeast, Area 3 15.6 northwest to 1981-84 <br /> southeast <br />4 center, Area 3 18.1 northwest to 1982-86 <br /> southeast <br />5 southeast, Area 3 18.3 northwest to 1982-87 <br /> southeast <br />6 dewatering trench, 17.3 circumference 1983-89 <br /> Area 4 <br />7 southeast, Area 4 16.46 southeast to 1983-91 <br />northwest <br />8 northwest, Area 4 12.0 southeast to 1989-92 <br />northwest <br />See Figure 1 for a diagram of the mining/reclamation sequence. <br />This staging sequence may be altered if Flatiron acquires the <br />property adjacent to East Rigden to the east. In that case an <br />amendment to the permit would be applied for so that planning <br />and mining would encompass the entire Flatiron landholding in <br />the area. <br />Depth of Ore Body and Underlying Stratum <br />The gravel deposit lies 6 to 14 feet thick below an overburden <br />D- 5 <br />