RDG is working with stakeholders to improve fish passage for both resident and anadromous fish species in the Pacific Northwest and Intermountain West. Projects in Oregon have focused on providing passage for steelhead, Chinook and coho salmon, endemic suckers, redband trout, and other native species. Montana fish passage projects typically involve improving passage for the State of Montana's species of special concern westslope cutthroat trout, and the federally-threatened bull trout. RDG employs techniques including roughened channel, streambed simulation culvert techniques, and natural and traditional fishway designs to correct fish passage limitations.
RDG also provides our clients with fish screen design services. We typically work with passive and active screen manufacturers to complete screening solutions. The projects are targeted at restricting fish loss to irrigation networks and modifying diversion structures to improve water use efficiency. RDG has completed screening projects in western Montana, the Willamette Valley, and in the Upper Deschutes River system.