SW6240201_Design Calculations (Culvert)_20240213

Culvert Report
Hydraflow Express Extension for Autodesk®Civil 3D®by Autodesk, Inc. Thursday,Jan 18 2024
Existing 18in RCP (25-YR)
Invert Elev Dn (ft) = 311.30 Calculations
Pipe Length (ft) = 41.20 Qmin (cfs) = 14.14
Slope (%) = 2.48 Qmax (cfs) = 14.14
Invert Elev Up (ft) = 312.32 Tailwater Elev (ft) = (dc+D)/2
Rise (in) = 18.0
Shape = Circular Highlighted
Span (in) = 18.0 Qtotal (cfs) = 14.14
No. Barrels = 1 Qpipe (cfs) = 14.14
n-Value = 0.012 Qovertop (cfs) = 0.00
Culvert Type = Circular Concrete Veloc Dn (ft/s) = 8.10
Culvert Entrance = Groove end projecting (C) Veloc Up (ft/s) = 8.30
Coeff. K,M,c,Y,k = 0.0045, 2, 0.0317, 0.69, 0.2 HGL Dn (ft) = 312.74
HGL Up (ft) = 313.70
Embankment Hw Elev (ft) = 315.37
Top Elevation (ft) = 315.52 Hw/D (ft) = 2.03
Top Width (ft) = 24.00 Flow Regime = Inlet Control
Crest Width (ft) = 5.00
Elev(ft) Existing 18in RCP(25-YR) H,ti Depth�aft:
316.00 3.5"0
315.00 2.68
314.:C - 1.68
313.00 0.68
312.0: - -0.32
311.:: -1.32
310.00 - -2.32
0 5 10 15 20 25 3D 35 4D 45 50 55 .0 55
CircularCulvert HGL - Embank
Reach,ft: