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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

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SW Terwilliger Boulevard Sewer Project

Construction Delayed Until 2016

May 2, 2014

Environmental Services will construct 6,800-feet of eight-inch gravity sewer in Terwilliger Boulevard from SW Powers Court to Highway 43. The new sewer will connect to the 30-inch Tryon Interceptor sewer, which carries sewage to the Tryon Creek Wastewater Treatment Plant inLake Oswego. This improvement toPortland’s wastewater collection system will help protect water quality, public health, and the environment.

After feedback from the public, neighbors, Multnomah County, City of Lake Oswego, many stakeholders, and extensive traffic management research, Environmental Services has decided to delay the project until the Sellwood Bridge Project, and other nearby projects, are complete. Construction of the SW Terwilliger Boulevard Sewer Project will not begin until sometime in 2016.

In the meantime, Environmental Services will continue to maintain the Powers Court Pump Station per the agreement with Dunthorpe-Riverdale Sewer District as needed.


Go to To receive email updates for this project, send an email to Debbie Caselton at with “Terwilliger” in the subject line.

Download Summer 2013 newsletter here.

SW Terwilliger Blvd Sewer Project Update: October 18, 2013

sw terwilliger project area map