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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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SE Hemlock and Harrison Alley Sewer Repair Project

Button. Click to sign up for email updatesEnvironmental Services completed construction on the SE Hemlock and Harrison Alley Sewer Repair Project. This project will replace 470 feet of 120-year-old public sewer pipes in the alley, install 430 feet of new sewer under the small rose garden east of Ladd’s Circle, and abandon 200 feet of sewer pipe between two properties on SE Cypress Avenue (see project map).

Developments of Note

Pipe installation and connections to the storm inlets and homes have been completed. Our contractor is currently conducting street repairs. Once the streets have been repaired curb and private property restoration will begin. All should be completed by mid-October.

Thank you for your patience

Final stages

Construction Method

The city’s contractor will replace public sewer pipes in this project using a trenchless method called pilot tube microtunneling, which uses a guided boring process to jack hollow steel casings through the ground to pilot a hole for the new pipe. The new pipe is then directly jacked behind the pilot tubes. This process avoids long, open trenches, and minimizes intrusion to the area above ground. The contractor will use open trench excavation to replace manholes, service laterals and storm drains. Click here for construction method details and photos.

For More Information

 If you have questions, please email or call Joe Annett at 503-823-2934. Please let us know if you have concerns such as business operations, disability issues or medical or business deliveries.

Manholes removal Locust alleyLaunch pit constructionPipe launching equipmentPilot tube entry to receiving pitPipe installation