Cedar Crossing Restoration Portland, Oregon
In reconnecting Johnson Creek to its historic floodplain, the stream restoration plan provided flood storage for peak flow attenuation, and improved riverine and wetland habitats. Otak led the overall project management, geomorphic assessment, monitoring data interpretation, hydrologic analysis and hydraulic modeling, as well as the comprehensive restoration design.
Enhanced Habitats for Endangered Species
Working with the City of Portland Bureau of Environmental Services (BES), the Cedar Crossing Restoration enhanced native riparian vegetation and tree canopy, creating high-flow refugia for listed Endangered Species Act (ESA) species, particularly several ESA-listed salmonids. Overarching project elements involved demolition of structures, management of contaminated soil as well as a number of complex design, permitting and site preparation considerations. The stream restoration design included in-stream channel structures, bank stabilization, large woody debris structures and the removal of nearly 2,000 feet of a century-old WPA rock wall that lined both banks of the stream.
As one of the last creeks where salmon are actively spawning in Portland, Oregon, Johnson Creek is home to a variety of this important species, including many that remain endangered. Take a closer look at the approach to this stream restoration design. And see how a return of natural features adds resilience to the area while helping ensure salmonids have a path from the ocean to spawning sites for generations to come.
