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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

MAILING ADDRESS: 1120 SW 5th Ave, Room 1000, Portland, OR 97204

More Contact Info

Stephens Creek Confluence Habitat Restoration Project

click here for a larger mapStephens Creek Confluence Habitat Enhancement Project

Environmental Services completed major construction on the Stephens Creek project in December 2008.

The confluence of Stephens Creek and the Willamette River is in Willamette Moorage Park on property owned by Portland Parks & Recreation (PP&R) The 3.5-acre site is part of a 35-acre complex of publicly owned natural areas known collectively as the South Portland Riverbank. 

Project Benefits

The Stephens Creek confluence provides critical rearing and refuge habitat for native, endangered Chinook and coho salmon and steelhead trout, and for rainbow and cutthroat trout, and Pacific and brook lamprey. This project improved in-stream, stream bank, and floodplain wetland habitat.

Project Details

Stephens Creek Confluence ProjectThe Stephens Creek Project:

  • Removed artificial structures, such as the combined sewer overflow (CSO) pipe, which limited natural floodplain connectivity

  • Re-sloped stream banks to increase stability and facilitate revegetation

  • Installed large wood in the project area to increase cover, shelter, and refuge potential (large wood complexes encourage formation of scour pools that provide deep, shady, cool refuge areas)

  • Created off-channel habitat to provide low-velocity refuge for fish during high flows

  • Stephens Creek Confluence ProjectRevegetated the site to increase habitat complexity and provide shade and overhanging vegetation cover to Stephens Creek and the Willamette River

  • Installed brush piles and snags to improve wildlife habitat



Several sources provided project funding, including:

For More Information

Call Environmental Services at 503-823-7740.