Tryon Creek Culvert Replacement: Bringing Salmon Back
Start Date
3-11-2024 4:00 PM
Abstract
The overarching goal of the Tryon Creek Culvert Replacement Project is simple: to restore native and wild salmonids and lamprey in the lower Willamette River. The existing Tryon Creek Highway 43 culvert is one-quarter mile upstream from the confluence of Tryon Creek and the Willamette River, and it bars access to vital spawning, rearing, and migratory habitat for all salmon, steelhead, and Pacific Lamprey using the Willamette. The City of Portland and project partner, the United States Army Corps of Engineers, will construct a new, much wider, open bottom culvert that will allow the stream to flow more naturally. The new culvert will also allow threatened and endangered fish passage into the high-quality, cold-water habitat in the upper Tryon Creek watershed.
The site poses significant design and construction challenges: construction under a major roadway (Highway 43), two sets of railroad tracks, a main sewer interceptor, and numerous utilities. The site is highly constrained, and access will be a challenge. The approach to permitting and financing may be a model for others who are considering a similar type of project.
Replacing the Tryon Creek culvert is one of several stream restoration efforts being implemented along this section of the lower Willamette River. The Tryon Creek Culvert Replacement Project along with the Kellogg Creek culvert project and stream restoration along the Clackamas River will provide miles of restored habitat for salmonids in the lower Willamette.
Subjects
Fisheries, Habitat restoration, Hydrology
Persistent Identifier
https://archives.pdx.edu/ds/psu/41394
Creative Commons License
This work is licensed under a Creative Commons Attribution-Share Alike 4.0 License.
Tryon Creek Culvert Replacement: Bringing Salmon Back
The overarching goal of the Tryon Creek Culvert Replacement Project is simple: to restore native and wild salmonids and lamprey in the lower Willamette River. The existing Tryon Creek Highway 43 culvert is one-quarter mile upstream from the confluence of Tryon Creek and the Willamette River, and it bars access to vital spawning, rearing, and migratory habitat for all salmon, steelhead, and Pacific Lamprey using the Willamette. The City of Portland and project partner, the United States Army Corps of Engineers, will construct a new, much wider, open bottom culvert that will allow the stream to flow more naturally. The new culvert will also allow threatened and endangered fish passage into the high-quality, cold-water habitat in the upper Tryon Creek watershed.
The site poses significant design and construction challenges: construction under a major roadway (Highway 43), two sets of railroad tracks, a main sewer interceptor, and numerous utilities. The site is highly constrained, and access will be a challenge. The approach to permitting and financing may be a model for others who are considering a similar type of project.
Replacing the Tryon Creek culvert is one of several stream restoration efforts being implemented along this section of the lower Willamette River. The Tryon Creek Culvert Replacement Project along with the Kellogg Creek culvert project and stream restoration along the Clackamas River will provide miles of restored habitat for salmonids in the lower Willamette.