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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Room 1000, Portland, OR 97204

Fanno Outfall Repair Project

Project Information

Environmental Services has begun construction on a project to replace a pipe that carries stormwater runoff from streets and other hard surfaces in parts of Hillsdale. Runoff from more than 10 acres between SW 18th and SW 21st Avenues near Beaverton-Hillsdale Highway drains into the corrugated metal pipe.

The pipe runs underneath Beaverton-Hillsdale Highway near the Bertha triangle and emerges in a deep ravine where it drains into Fanno Creek. Portions of the 12-inch wide, 130-foot long pipe are badly corroded and failing.

This project will replace the pipe and revegetate the banks of Fanno Creek in and around the work area. The project will also include constructing a facility (or swale) to manage stormwater and sediment, and removing and planting a portion of SW 21st Avenue (see map).

An informal trail will provide pedestrians a way to get off of Beaverton-Hillsdale Highway. The closure of SW 21st Avenue is recommended in the Portland Bureau of Transportation's High Crash Corridor Plan for this area.

Project Schedule

Construction began on July 21, 2014, and is expected to last until mid-late August.

Traffic Control

When work is taking place in Beaverton-Hillsdale Highway, several traffic controls will be in place:

  • Construction on Beaverton-Hillsdale Highway from 7:00 a.m. to 3:00 p.m. will restrict through traffic to one lane in either direction. Most lanes will re-open during non-working hours.
  • The work will close a short segment of northbound SW Bertha Boulevard, from SW Bertha Court to Beaverton-Hillsdale Highway. The closure will be in effect 24 hours a day for roughly three weeks, but construction work hours will be limited to 7:00 a.m. to 6:00 p.m. Monday through Saturday during that time. Traffic heading to westbound Beaverton-Hillsdale Highway should follow the signed detour route or use an alternate route. For the rest of the project duration, the street segment will be closed from 7:00 a.m. to 3:00 p.m. Monday through Saturday, and will be open to traffic after work hours. Message signs, with construction dates and times, will be in place in advance of the work on Beaverton Hillsdale Highway.
  • Travel lanes on southbound SW Bertha Boulevard from Beaverton-Hillsdale Highway will remain open.

Drivers in the area should expect delays during construction. Pedestrians should detour around the work site.

For More Information

With questions or for more information, please contact Becky Tillson at 503-823-2827 or To be added to an email update list, email Becky with “Fanno Outfall Project” in the subject line.