SW6211001_Design Calculations (Culvert, Pipe 3)_20211014

Culvert Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc.
Thursday, Jul 22 2021
Pipe 3
Invert Elev Dn (ft)
= 246.10
Calculations
Pipe Length (ft)
= 42.30
Qmin (cfs)
= 39.20
Slope (%)
= 3.45
Qmax (cfs)
= 39.20
Invert Elev Up (ft)
= 247.56
Tailwater Elev (ft)
= (dc+D)/2
Rise (in)
= 18.0
Shape
= Circular
Highlighted
Span (in)
= 18.0
Qtotal (cfs)
= 39.20
No. Barrels
= 1
Qpipe (cfs)
= 18.33
n-Value
= 0.012
Qovertop (cfs)
= 20.87
Culvert Type
= Circular Concrete
Veloc Dn (ft/s)
= 10.41
Culvert Entrance
= Groove end projecting (C)
Veloc Up (ft/s)
= 10.47
Coeff. K,M,c,Y,k
= 0.0045, 2, 0.0317, 0.69, 0.2
HGL Dn (ft)
= 247.58
HGL Up (ft)
= 249.01
Embankment
Hw Elev (ft)
= 251.98
Top Elevation (ft)
= 251.20
Hw/D (ft)
= 2.95
Top Width (ft)
= 25.00
Flow Regime
= Inlet Control
Crest Width (ft)
= 10.00
ear (t)
252A0
251.00
260A0
249.00
248.00
247.00
246.00
245.00
0
Pipe 3
Hw Depth (t)
4.44
3.44
2.44
1.44
0.44
-0.56
AM
-2.56
5 10 15 20 25 30 35 40 45 50 55 60 65
cirWffcWvert HGL Embank
Reach (tt)