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• <br /> <br />C~ <br />J <br />STRIPPING COAL ORIGINAL FINAL <br />RATIO THICKNESS THICKNESS THICKNESS <br />Exhibit 1'L <br />CHANGE IN <br />SURFACE EL <br />1:1 6.0 12.0 7.8 -4.2 <br />2:1 6.0 18.0 15.6 -2.4 <br />3:1 6.0 24.0 23.4 -0.6 <br />4:1 6.0 30.0 31.2 1.2 <br />5:1 6.0 36.0 39.0 3.0 <br />6:1 6.0 42.0 46.8 4.8 <br />7:1 6.0 48.0 54.6 6.6 <br />8:1 6.0 54.0 62.4 ~~ <br />12-2 <br />