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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

Sign up for email updatesEnvironmental Services will begin construction this fall on 7,600 feet of eight-inch gravity sewer in Terwilliger Boulevard from SW Northgate Avenue 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 in Lake Oswego. The city originally planned to start work in May 2014 but postponed it to avoid conflicts with Multnomah County's Sellwood Bridge project. This improvement to Portland’s wastewater collection system will help protect water quality, public health, and the environment.

sw terwilliger project area map

 For More Information

To receive email updates for this project, email Ashley Tjaden at with “Terwilliger” in the subject line. You can also call Ashley at 503-823-5281 or email her with questions or comments.

Receive Project Traffic Alerts by Text

You can receive text messages of urgent traffic alerts by simply requesting to be put on the text message list. Messages are 1-2 sentences long and convey information such as road closures and openings. Major mobile networks are capable of this, but message and data rates may apply. Please email Ashley with “Terwilliger” in the subject line and in the body of the email provide your mobile phone number and the name of your network carrier.

Traffic Detour Map

Trail Information Map

SW Terwilliger Blvd Sewer Project Update: January 26, 2016

Download Summer 2013 newsletter here.

SW Terwilliger Blvd Sewer Project Update: October 18, 2013