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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

MAILING ADDRESS: 1120 SW 5th Ave, Room 1000, Portland, OR 97204

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Southeast Interceptor Sewer Repair

Updated September 7, 2018Button. Click to sign up for email updates

Environmental Services is continuing construction in inner southeast Portland to repair the deep and wide Southeast Interceptor sewer line that is deteriorating due to age. The sewer line runs parallel to the Willamette River under inner southeast neighborhoods and is between 5 to 6 feet wide and 25 to 54 feet below the surface.


The project includes two segments of the Southeast Interceptor (see map below).

Night Work - September 17-21 - Northern Section Only

During the week of September 17-21, work will occur at night between the hours 8 p.m. to 6 a.m. in the northern section only to reduce traffic conflicts on Grand Avenue.

The work will focus on investigating the actual conditions of this section of the sewer tunnel. Fans will provide safe ventilation for crews working inside the pipe. A generator will run the sewer bypass system to provide uninterrupted sewer service. There will be no drilling.

The Portland Bureau of Transportation recommended, and the Noise Office approved, this night work. If you have a noise complaint during nighttime construction work, please call the noise hotline at 503-823-8353.

ScheduleProject map

After the nighttime inspections in the northern section are completed, daytime work will resume in the southern section. Construction is anticipated to stop by this October, when rainfall will make it unsafe to work inside the deep pipe tunnel.

Construction Methods

The sewer repair method for this project can only be completed from inside the sewer line. Crews enter the Interceptor pipes from manholes and climb down 25 to 54 feet below the surface. While that avoids having to dig trenches in the roadway, it means crews can only work safely on dry days when there will be no flow into the pipes from rain or other parts of the sewer system.

Daytime construction in the southern section will finish up after the nighttime inspections in the northern section. Crews will continue patching grouting holes inside the sewer tunnel.

Environmental Services will review its design for the project and schedule repair work in the northern section at a future date.

Report Odor Concerns

Sewage wastewater flowing through sewer pipes contains naturally occurring gases that can build up and create odors. Sometimes during periods of warm temperatures and no rainfall to flush the sewage through the pipes, the odors can increase. Call 503-823-1700 to report unpleasant odors coming from manholes so our crews can investigate and correct the problem if possible. The line is monitored 24 hours a day, 7 days a week.

For more information

For more details about the construction methods, what to expect during construction, and traffic impacts, click here. If you have questions and concerns you’d like to discuss, please call or email:

Cheryl Kuck
Community Outreach
Phone: 503-823-7898

If you have a concern or question about a pipe repair near you, please be sure to include your name, property address and project name (Southeast Interceptor) in your voicemail and email so we can provide you more details about what to expect in front of your property. Also, please write "SEI" in the subject line of your email. Click SIGN UP to sign up for periodic email updates.

Project Overview

Including the project description, map and schedule

Community Outreach

Check out current and previous communications about the project