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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Ave, Suite 613, Portland, OR 97204

More Contact Info

Tryon Creek Trunk Sewer Repair Project

photo of Tryon Creek trunk sewer

The Tryon Creek Trunk Sewer is a 30-inch, above-ground pipe that carries sewage from parts of southwest Portland and Lake Oswego to the City of Portland’s Tryon Creek Wastewater Treatment Plant in Lake Oswego. Environmental Services is planning repairs, including a seismic upgrade, to a portion of the 50-year-old pipe between the Tryon Creek State Natural Area and the Tryon Creek Wastewater Treatment Plant.

Environmental Services is developing alternatives to the best way to repair the sewer while protecting native steelhead, cutthroat trout and coho salmon in Tryon Creek.

For More Information

With questions or comments, please contact Becky Tillson at 503-823-7097 or