Hydraulic Design of Highway Culverts - DOT On-Line Publications

Example Problem #3 (English Units)
Design a culvert to pass a 25-year flow of 220 ft³/s. Minimum depth of cover for this culvert is 2
ft.
ELhd: 105 ft based on adjacent structures
Shoulder Elev.: 105.5 ft
Elevation of Stream Bed at Culvert
Face (ELsf): 100 ft
Original Stream Slope: 5 percent
Tailwater Depth: 4 ft
Approximate Culvert Length: 150 ft
Due to the low available cover over the conduit, use an elliptical concrete pipe. Use of a small
depression (FALL) of about 1 ft at the inlet is acceptable.
NOTE: Hardcopy Design Chart 29B, 31B, and 33B are used in this solution.
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