Accommodating Fish Passage at River Crossings

Status:  Complete
Report Date:  08/31/2011


Researchers assessed how well the use of recessed culverts in Minnesota creates hydraulic conditions, including reduced water velocities, that are more amenable to fish passage at river crossings. Of 19 sites surveyed, six were not functioning properly; a lack of sediment in the recessed culvert barrels indicated increased water velocities. Researchers determined that undersized recessed culvert barrels and accumulation of sediment in side barrels caused the lack of sediment accumulation.

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