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r~ <br />~J <br />• <br />• <br />Table 5 <br />Comparison of Areal Extent of <br />Mining Projections: 1980 and 1994 <br />Areal Parameter 1980 1994 <br />Existing <br />Perimeter 8700 ft 35000 fr <br />Area of Mine 3.4 x 106 ftZ 3.99 x 10' ftZ <br />Exposed Roof 2.2 x 106 ftZ 2.8 x 10' ftZ <br /> (65% extraction) (1.6 x 10' ~ 60% and <br /> 2.4x10'75%) <br />Permit Term <br />Perimeter NA 4.8 x 10" ft <br />Area of Mine NA 8.45 x 10' fr2 ~ <br />Exposed Roof NA 6.1 x 10' ftZ <br /> (1.6x10'@60%and <br /> 6.9x10'@75%) <br />Life-of-Mine <br />Perimeter 4.6 x 10' ft 5.2 x 10° fr <br />Area of Mine 1.7 x 108 ftZ 1.21 x 108 ftZ <br />Exposed Roof 1.1 x 108 ftZ 8.9 x 10' ftZ <br /> (1.6x10'60%and <br /> 1 x 108 @ 75 %) <br />17 <br />