Culvert roughness elements for native Utah fish passage : phase I.

PDFTech ReportUT-11.0210-9155, work unit no. 5H06494HFish laddersCulvertsUtahUtah. Dept. of Transportation. Research DivisionEsplin, Lindsay D.Hotchkiss, Rollin H.Brigham Young University. Dept. of Civil and Environmental EngineeringUtah. Dept. of Transportation. Research DivisionUS Transportation CollectionLaboratory flume testing of native Utah non-salmonid fish was performed to observe howthey use altered flow around obstacles to swim upstream. Three experimental setups includeda bare Plexiglas flume, vertical cylinders, and natural substrate placed in the flume. It wasfound that substrate provides the most refuge for upstream swimming fish. Field testedresults of these experimental findings in Phase IIwill allow engineers to take advantage ofreduced velocity zones in retrofitted culvert design