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Table 81 <br />• AVERAGE PERCENTAGES OF VARIOUS LITHOTYPES IN THE <br />OVERBURDEN AT THE EAGLE MINE COMPLEX <br />Lithotype <br />Average Percentage <br />Sandstone beds less than or equal to 5 ft. in thickness <br />Sandstone beds greater than 5 ft. in thickness <br />Sandy siltstone <br />Siltstone <br />Mudstone <br />Coal <br />• <br />8% <br />39 % <br />11 % <br />14 % <br />21 % <br />7% <br />