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<br />- REGRADED TOPOGRAPHY - <br />ORIGINAL TOPOGRAPHY - <br />., <br /> <br />TOTAL BANK OVERBURDEN <br />AND PARTINGS db ds <br />-TOP OF COAL - <br />TOTAL COAL THICKNESS <br />- PIT-FLOOR - <br />Ls <br />AREA swell = (DEPTHswell~(LENGTHsection~ <br />AREAbank = (DEPTH bank)(LENGTH sectlon~ <br />PERCENT SWELL FACTOR = [(AB/Ab)-~ 100 <br />ILLUSTRATIVE CROSS <br />SECTION <br />EXHIBIT 2 <br />