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SEDCAD+ CULVERT SIZING UTILITY <br />3a <br />Design Discharge = 20.000 cfs <br />Entrance Loss Coefficient = 0.9 <br />Pipe Length = 40.000 feet <br />Pipe Slope = 2.000 e <br />Manning~s n = 0.024 <br />Maximum Headwater = 3.000 feet <br />Tailwater Depth = 0.000 feet <br />Smallest Diameter Required to Pass Flow is 30 inche <br />PERFORMANCE CURVES: <br />Diameter: 21 inches <br />Headwater Discharge Flow <br />(ft) <br />------ <br />----- (cfs) <br />-- <br />---- Control <br />------------------------- Type <br />--------- <br />-- <br />0.30 ----- <br />0.71 Outlet (Subcritical) 2 <br />0.60 1.73 Inlet (Supercritical) 3 <br />0.90 3.13 Inlet (Supercritical) 3 <br />1.20 4.82 Inlet (Supercritical) 3 <br />1.50 6.74 Inlet (Supercritical) 3 <br />1.80 8.34 Outlet (Subcritical) 2 <br />2.10 9.59 Outlet (Subcritical) 1 <br />2.40 12.66 Outlet 6 <br />2.70 13.82 Outlet 6 <br />3.00 14.81 Outlet 6 <br />3.30 15.74 Outlet 6 <br />3.60 16.62 Outlet 6 <br />3.90 17.45 Outlet 6 <br />4.20 18.25 Outlet 6 <br />4.50 19.02 Outlet 6 <br />* (Transiti on Region - Data may need to be smoothed.) <br />Diameter: 24 inches <br />Headwater Discharge Flow <br />(ft) (cfs) <br />---- Control <br />------------------------ Type <br />--------- <br />------------- <br />0.30 -------- <br />0.78 Outlet (Subcritical) 2 <br />0.60 1.95 Inlet (Supercritical) 3 <br />0.90 3.59 Inlet (Supercritical) 3 <br />1.20 5.51 Inlet (Supercritical) 3 <br />1.50 7.70 Inlet (Supercritical) 3 <br />1.80 10.11 Inlet (Supercritical) 3 <br />2.10 12.75 Inlet (Supercritical) 3 <br />2.40 13.77 Outlet (Subcritical) 1 <br />2.70 17.54 Inlet 5 <br />3.00 19.26 Outlet 6 <br />3.30 20.59 Outlet 6 <br />3.60 21.84 Outlet 6 <br />3.90 23.03 Outlet 6 <br />4.20 24.15 Outlet 6 <br />4.50 25.22 Outlet 6 <br />A <br />