HY-8 Culvert Analysis Report
Crossing Discharge Data
Discharge Selection Method: Specify Minimum, Design, and Maximum Flow
Minimum Flow: 0 cfs
Design Flow: 135.644 cfs
Maximum Flow: 317.832 cfs
Table 1 - Summary of Culvert Flows at Crossing: Crossing 1
Headwater Elevation Culvert 1 Discharge Roadway Discharge
Total Discharge (cms) Iterations
(m) (cms) (cms)
1205.06 0.00 0.00 0.00 1
1205.59 0.90 0.90 0.00 1
1205.87 1.80 1.80 0.00 1
1206.12 2.70 2.70 0.00 1
1206.50 3.84 3.84 0.00 1
1206.79 4.50 4.50 0.00 1
1207.26 5.40 5.40 0.00 1
1207.82 6.30 6.30 0.00 1
1208.49 7.20 7.20 0.00 1
1208.69 8.10 7.43 0.67 5
1208.80 9.00 7.57 1.43 5
1208.50 7.21 7.21 0.00 Overtopping
Rating Curve Plot for Crossing: Crossing 1
Table 2 - Culvert Summary Table: Culvert 1
Total Culvert Headwater Inlet Outlet Outlet Tailwater
Flow Normal Critical Outlet Tailwater
Discharge Discharge Elevation Control Control Velocity Velocity
Type Depth (m) Depth (m) Depth (m) Depth (m)
(cms) (cms) (m) Depth (m) Depth (m) (m/s) (m/s)
0.00 0.00 1205.06 0.000 0.000 0-NF 0.000 0.000 0.000 0.000 0.000 0.000
0.90 0.90 1205.59 0.526 0.346 1-S2n 0.337 0.378 0.342 0.255 1.895 0.829
1.80 1.80 1205.87 0.809 0.597 1-S2n 0.493 0.542 0.502 0.387 2.280 1.061
2.70 2.70 1206.12 1.059 0.868 5-S2n 0.636 0.670 0.641 0.493 2.539 1.220
3.84 3.84 1206.50 1.444 1.409 7-M2c 0.866 0.797 0.797 0.607 2.861 1.372
4.50 4.50 1206.79 1.729 1.599 7-M2c 1.000 0.854 0.854 0.667 3.150 1.445
5.40 5.40 1207.26 2.200 1.934 7-M2c 1.000 0.911 0.911 0.743 3.596 1.533
6.30 6.30 1207.82 2.763 2.325 7-M2c 1.000 0.946 0.946 0.813 4.095 1.609
7.20 7.20 1208.49 3.435 2.774 7-M2c 1.000 0.930 0.930 0.879 4.729 1.678
8.10 7.43 1208.69 3.627 2.895 6-FFc 1.000 1.000 1.000 0.942 4.731 1.740
9.00 7.57 1208.80 3.743 2.969 4-FFf 1.000 1.000 1.000 1.002 4.819 1.797
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Straight Culvert
Inlet Elevation (invert): 1205.06 m, Outlet Elevation (invert): 1205.00 m
Culvert Length: 12.00 m, Culvert Slope: 0.0050
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Culvert Performance Curve Plot: Culvert 1
Water Surface Profile Plot for Culvert: Culvert 1
Site Data - Culvert 1
Site Data Option: Culvert Invert Data
Inlet Station: 0.00 m
Inlet Elevation: 1205.06 m
Outlet Station: 12.00 m
Outlet Elevation: 1205.00 m
Number of Barrels: 2
Culvert Data Summary - Culvert 1
Barrel Shape: Circular
Barrel Diameter: 1000.00 mm
Barrel Material:
Embedment: 0.00 mm
Barrel Manning's n: 0.0120
Culvert Type: Straight
Inlet Configuration: Square Edge with Headwall
Inlet Depression: None
Table 3 - Downstream Channel Rating Curve (Crossing: Crossing 1)
Water Surface
Flow (cms) Depth (m) Velocity (m/s) Shear (Pa) Froude Number
Elev (m)
0.00 1205.00 0.00 0.00 0.00 0.00
0.90 1205.26 0.26 0.83 12.50 0.54
1.80 1205.39 0.39 1.06 18.95 0.57
2.70 1205.49 0.49 1.22 24.14 0.58
3.84 1205.61 0.61 1.37 29.77 0.60
4.50 1205.67 0.67 1.45 32.70 0.60
5.40 1205.74 0.74 1.53 36.41 0.61
6.30 1205.81 0.81 1.61 39.86 0.62
7.20 1205.88 0.88 1.68 43.10 0.62
8.10 1205.94 0.94 1.74 46.17 0.62
9.00 1206.00 1.00 1.80 49.09 0.63
Tailwater Channel Data - Crossing 1
Tailwater Channel Option: Trapezoidal Channel
Bottom Width: 4.00 m
Side Slope (H:V): 1.00 (_:1)
Channel Slope: 0.0050
Channel Manning's n: 0.0320
Channel Invert Elevation: 1205.00 m
Roadway Data for Crossing: Crossing 1
Roadway Profile Shape: Constant Roadway Elevation
Crest Length: 5.50 m
Crest Elevation: 1208.50 m
Roadway Surface: Gravel
Roadway Top Width: 3.00 m
