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| |  | | side channel creation for salmonid habitatclackamas river, oregon  The Oregon Wildlife Heritage Foundation received a grant from Portland General Electric to create two new side channels off the Clackamas River to restore valuable rearing, forage, and refuge habitat for juvenile salmon and steelhead native to the Willamette River Basin. Inter-Fluve designed and constructed 4,400 feet of new channel, making this one of the largest off-channel rearing habitat efforts in the State of Oregon. Design includes: - A created upper side channel that is active during typical winter season flow events. Constructed with a series of pools and riffles; massive engineered logjams are strategically placed to restrict flow into the 1,650 foot channel.
- A created groundwater channel that is 2,600 feet long. Hyporheic source water provides cool oxygenated water during summer months.
- A third channel at the outlet portion of a larger existing side channel to the Clackamas. The lower 200 feet was opened to allow young fish to enter, forage, seek refuge and return to the river.
- Over 450 large trees were utilized throughout the project in massive logjam complexes and in-channel habitat features.
The project is the result of a unique collaboration between Portland General Electric, the Oregon Wildlife Heritage Foundation, Metro Regional Parks and Greenspaces, and the Oregon Department of Fish and Wildlife. Completed Summer 2004. |
| Project Owners
Portland General Electric
Oregon Wildlife Heritage Foundation
Metro Regional Parks and Greenspaces
Project Elements
- New side-channel design
- Fish habitat creation
- Hydraulic/sediment mobility analysis
- Recommendations for best management practices
- Listed salmonid species habitat recovery
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