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State Reg. <br />4.14.4 THIN AND THICK OVERBURDEN. The Seneca II Mine does not meet <br />4.14.5 the requirements of either the thick or thin overburden <br />regulations as shown by the following calculations. <br />51' Avg. Overburden Thickness <br />9.5' Avg. Wadge Thickness <br />At the average stripping depth: <br />51' Overburden <br />9.5' Coal <br />60.5' of material removed <br />O 15.3% swell <br />1.153 x 51' = 58.8' of material replaced <br />58.8' s 60.5' = 0.97 of the initial thickness <br />therefore does not meet either the 0.8 of the initial <br />thickness requirement for thin overburden or the 1.2 of <br />the initial thickness requirement for thick overburden. <br />WOLF CREEK COAL SEAM <br /> <br />68' Avg. Overburden Thickness <br />16' Avg. Wolf Creek Thickness <br />,~-60 <br />Revised 8/27/86 <br />WADGE COAL SEAM <br />