Appendix H-E&SC Calculations

Channel Report
Hydraflow Express Extension for AutoCAD®Civil 3D®2013 by Autodesk, Inc. Tuesday, May 13 2014
Sediment Trap-flow over spillway if trap is full
Trapezoidal Highlighted
Bottom Width (ft) = 12.00 Depth (ft) = 0.40
Side Slopes (z:1) = 2.00, 2.00 Q (cfs) = 9.720
Total Depth (ft) = 1.50 Area (sqft) = 5.12
Invert Elev (ft) = 103.50 Velocity (ft/s) = 1.90
Slope (%) = 0.50 Wetted Perim (ft) = 13.79
N-Value = 0.028 Crit Depth, Yc (ft) = 0.27
Top Width (ft) = 13.60
Calculations EGL (ft) = 0.46
Compute by: Known Q
Known Q (cfs) = 9.72
Elev (ft) Section Depth (ft)
106.00 2.50
105.50 2.00
105.00 1.50
104.50 1.00
104.00 N000.50
103.50 0.00
103.00 -0.50
0 2 4 6 8 10 12 14 16 18 20 22
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD®Civil 3D®2013 by Autodesk, Inc. Wednesday,Jun 11 2014
Skimmer Basin-4" Outlet Pipe Flowing Full
Circular Highlighted
Diameter (ft) = 0.33 Depth (ft) = 0.32
Q (cfs) = 0.076
Area (sqft) = 0.08
Invert Elev (ft) = 100.00 Velocity (ft/s) = 0.90
Slope (%) = 0.50 Wetted Perim (ft) = 0.90
N-Value = 0.024 Crit Depth, Yc (ft) = 0.16
Top Width (ft) = 0.14
Calculations EGL (ft) = 0.33
Compute by: Known Depth
Known Depth (ft) = 0.32
Elev (ft) Section
101.00
100.75
100.50
100.25
100.00
99.75
0 1
Reach (ft)

Channel Report
Hydraflow Express Extension for AutoCAD®Civil 3D®2013 by Autodesk, Inc. Wednesday,Jun 11 2014
Sediment Basin-12" Outlet Pipe Flowing Full
Circular Highlighted
Diameter (ft) = 1.00 Depth (ft) = 0.99
Q (cfs) = 1.364
Area (sqft) = 0.79
Invert Elev (ft) = 100.00 Velocity (ft/s) = 1.74
Slope (%) = 0.50 Wetted Perim (ft) = 3.14
N-Value = 0.024 Crit Depth, Yc (ft) = 0.50
Top Width (ft) = 0.00
Calculations EGL (ft) = 1.04
Compute by: Known Depth
Known Depth (ft) = 0.99
Elev (ft) Section Depth (ft)
102.00 2.00
101.50 1.50
101.00 1.00
100.50 0.50
100.00 0.00
99.50 -0.50
0 1 2 3
Reach (ft)