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Task 81a SLB Addendum to Seneca II Reclamation Cost Estimate <br />C-1980-005 4/17/2007 Excavation Calculations for Post-Mining Drainage Channels <br />lin.ft. depth top width bottom width cy/lin.ft. cy total <br />PM-8 <br />V-Ditch #1 1150.00 1.25 7.50 0.00 0.17 199.64 <br />V-Ditch #2 1350.00 1.20 7.20 0.00 0.16 216.00 <br />V-Ditch #3 1425.00 1.25 7.50 0.00 0.17 247.38 <br />V-Ditch #4 1050.00 1.20 7.20 0.00 0.16 168.00 <br />V-Ditch #5 950.00 1.35 7.80 0.00 0.20 185.25 <br />Trap. from V-1 360.00 1.25 8.80 1.00 0.22 78.84 <br />Trap. from V-2 460.00 1.05 7.30 1.00 0.16 74.06 <br />Trap. from V-3 400.00 0.90 6.40 1.00 0.12 49.20 <br />Trap. from V-4 410.00 0.75 5.50 1.00 0.09 36.90 <br />Trap.from V5 to end 1710.00 0.65 6.90 3.00 0.12 203.49 <br />PM12A <br />entire length 1250.00 0.80 21.00 3.00 0.36 444.44 <br />190320