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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

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Fanno Creek Outfall Project Update


construction crew replacing pipeConstruction is nearly complete on a project in southwest Portland to replace a deteriorating stormwater pipe.  This project will help improve water quality in Fanno Creek.

The pipe carries stormwater runoff from streets and other hard surfaces in parts of Hillsdale, and drains into Fanno Creek.  Stormwater runoff carries dirt, oil, and other urban pollutants that can impact water quality in rivers and streams.  Portions of the old 12-inch wide, 130-foot long pipe were badly corroded and failing. 

The project began construction this summer and is expected to be complete later in September.  Crews have finished installing the new pipe across Beaverton-Hillsdale Highway and repairing the outfall in Fanno Creek. The project includes closing a section of SW 21st to reduce sediment that flows to the creek, and to increase traffic safety. A section of pavement will be removed to create a swale with native plants to help capture stormwater pollutants. 

Crews have also stabilized the slope down into the creek and will be applying grass seed soon.  Re-vegetation staff are currently working to remove invasive species, and will be planting native plants on about one acre around the work areas this winter and next winter.

For more information visit our project website

Learn more about the Fanno Creek Watershed here, and at the Southwest Watershed Resource Center.

(post edited 9/23/14) 


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