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TABLE - 4 <br />Calculations of Average Original Depth to Top of Coal Seam in Test Area <br />and <br />Average Depth of Overburden Placed into Test Area <br />Calculation of Average Original Depth to Top of Coal Seam <br />Planimeter Weight Average Factor <br />Designation Units (in2) (in2 - ft) <br />Pit - I 2.18 138.400 <br />Area - I 12.59 702.895 <br />Total 14.77 841.295 <br />Original Average Depth = 841.295(in2 - ft) 56.96 ft <br />14.77 (in2) <br />Calculation of Average Overburden Depth Placed into Test Area During Removal <br />Planimeter Weight Average Factor <br />Designation Units (in2) (in2 - ft) <br />Area - I 12.59 702.895 <br />Pit - 2 2.10 108.225 <br />Total 14.69* 811.120 <br />Overburden Average Depth 811.120(in2 - ft) .54.92 ft <br />Placed in Test Area 14.77 (in2) <br />* Note area of material placed into test area smaller than actual test <br />area reducing average depth. <br />• <br />