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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

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Developments of Note

Developments of Note

Construction Delayed until Winter 2019

The Boones Ferry Road Culvert Replacement construction is now expected to begin in winter 2019. The project, originally scheduled to begin in 2018, has been delayed due to a number of complex factors including: 1) expanding design scope to respond to community concerns; 2) utility relocation; 3) timing restrictions with in-water work and length of construction; and 4) responding to traffic control plan concerns. 

The Project aims to remove an undersized 60-inch, 140-foot-long corrugated metal pipe culvert that carries Tryon Creek under SW Boones Ferry Road, and to replace it with a new single span steel girder bridge allowing fish passage and providing a safer crossing for pedestrians and wildlife. The existing culvert restricts stream flow and does not allow fish to access Upper Tryon Creek and Arnold Creek upstream of SW Boones Ferry Road. The SW Boones Ferry Road culvert has been identified by the City of Portland as one of two major fish passage barriers on the mainstem of Tryon Creek. This project also includes improvements to both Tryon and Arnold Creeks upstream of the culvert which will expand upstream habitat and provide significant benefits to fish that use the streams.

Tryon Creek is home to a number of native fish species including steelhead trout (resident and anadromous), coastal cutthroat trout, and Coho salmon. Because the project includes work in Tryon Creek, Environmental Services follows the Oregon Department of Fish and Wildlife’s guidelines for in-water work. The guidelines have been put in place to minimize impacts to important fish, wildlife and habitat resources. Construction in stream corridors is generally only permitted in the dry seasons, and outside of certain vulnerable life stages of fish including migration, spawning and rearing. 

The project delay until 2019 is due in part to the fact that construction in the stream is limited to the summer months. While a number of the remaining design elements can be completed in the next several months, the in-water work needs to be coordinated with the extensive excavation required to remove the 36 feet of fill and ~8,000 cubic yards that currently supports SW Boones Ferry Road.

Environmental Services looks forward to completing design in the coming year and moving into construction on this fish, wildlife, and trail passage partnership. Please feel free to email or call me with any questions or comments you might have about the project.

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For More Information

If you have questions, comments or concerns, please contact Stefanus Gunawan at 503-823-5759 or email