Fish passage through culverts

Publication Date



fish passage, Army Corps of Engineers, engineering, water velocity, water level, culverts, Gradient, rating curves, design, design criteria

Publication place

Salem, OR


Oregon State Game Commission, Fisheries Division


A series of culvert velocity curves has been developed by the U.S. Army Corps ofEngineers and the Engineering Section of the Oregon Game Commission. The curves predictwater velocities encountered at different water levels in round corrugated steel culverts from twoto seven feet in diameter and on gradients from 0.25 to 5.0 percent. Maximum allowablevelocities for fish passage are combined with the rating curves to give design criteria for fishpassage. Fish passage design criteria for other methods of stream crossing techniques includingpipe-arch culverts and box- type concrete culverts are mentioned.

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