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April 1989 <br />• <br />TABLE 3.4.A.6 <br />MINEABLE SEAMS, INTERBURDEN, AND COVER DEPTH <br />• <br />• <br />AREA MINEABLE INTERBURDEN COVER DEPTH <br /> SEAM (FT) (FT) <br />I F and B 380 1130 on B <br />II F, E, and B 200 B-E 1200 on B <br /> 100 E-F <br />III F, G, and B 240 B-E 1500 on B <br /> 80 E-F ' <br />IV F, E, and B 190 B-E 900 on B <br /> 110 E-F <br />V F and E 110 1000 on E <br /> <br />