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w <br />• <br />SEDCAD 4 for Windows <br />Copyright 1998 Pamela J. Schwab <br />Civil Software Design <br />Structure #2 (Silt Fence) <br />Silt Fence Inputs: <br />Structure Detail; <br />Fence Flow Width along Land Slope Tie -back <br />Rate <br />(gPm /�I ft) contour (ft) Height (ft) ( %) distance (ft) <br />5.6 22.0 2.5 17.00 14.7 <br />*Sediment Storage: 0.00 ac -ft <br />*Sediment capacity based on A verage Annual R of 22.0 for 1 year(s) <br />Silt Fence Results: <br />Peak Fence Stage: <br />2.45 ft <br />Peak Water Stage: <br />1.76 ft <br />Dewater Time: <br />0.50 days <br />Trap Efficiency: <br />37.97% <br />Dewatering time is calculated from peak stage to lowest spillway <br />Stage - Capacity- Discharge Table <br />Fence Stage <br />(ft) <br />Water Stage <br />{ft) <br />Area <br />(ac) <br />Capacity <br />(ac -ft) <br />Discharge <br />(cfs) <br />Dewater <br />Time <br />(hrs) <br />0.00 <br />0.000 <br />0.000 <br />0.10 <br />0.000 <br />0.000 <br />0.20 <br />0.001 <br />0.000 <br />0.30 <br />0.001 <br />0.000 <br />0.40 <br />0.001 <br />0.000 <br />0.50 <br />0.001 <br />0.000 <br />0.69 <br />0.00 <br />0.002 <br />0.000 <br />0.000 <br />Top of Sediment <br />0.79 <br />0.10 <br />0.000 <br />0.000 <br />0.028 <br />0.10 <br />0.89 <br />0.20 <br />0.001 <br />0.000 <br />0.062 <br />8.4S <br />0.99 <br />0.30 <br />0.001 <br />0.000 <br />0.103 <br />1.95 <br />1.09 <br />0.40 <br />0.001 <br />0.000 <br />0.151 <br />0.55 <br />1.19 <br />0.50 <br />0.001 <br />0.000 <br />0.206 <br />0.45 <br />1.29 <br />0.60 <br />0.002 <br />0.001 <br />0.267 <br />0.05 <br />1.39 <br />0.70 <br />0.002 <br />0.001 <br />0.336 <br />0.40 <br />1.49 <br />0.80 <br />0.002 <br />0.001 <br />0.411 <br />1.59 <br />0.90 <br />0.003 <br />0.001 <br />0.493 <br />0.05 <br />1.69 <br />1.00 <br />0.003 <br />0.002 <br />0.582 <br />1.79 <br />1.10 <br />0.003 <br />0.002 <br />0.677 <br />1.89 <br />1.20 <br />0.004 <br />0.002 <br />0.780 <br />Filename: drillpadSAERev3.sc4 <br />2 <br />Printed 03 -05 -2001 <br />