Accommodating Fish Passage at River CrossingsStatus: CompleteReport Date: 08/31/2011 Summary: 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. Final Deliverables: Report #2011-19 Research Summary Related Materials: Related Research: Cost Analysis of Alternative Culvert Installation Practices in MN. Minnesota Culvert Manual to Accommodate Aquatic Species Passage Assessing Culverts in Minnesota: Fish Passage and Storm Vulnerability