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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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SE Hemlock and Harrison Alley Sewer Repair Project

Button. Click to sign up for email updatesEnvironmental Services continues construction on the SE Hemlock and Harrison Alley Sewer Repair Project in early June. 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).

DUE TO MACHANICAL ISSUES OUR CONTRACTOR WILL BE WORKING BOTH SATURDAY AND SUNDAY THIS WEEK TO FINISH THE FINAL PUSH OF THE PIPE UNDER THE ROSE GARDEN.

Saturday hours will be 7am to 8pm and Sunday hours will be 9am to 5pm.

Thank you for your patience.

Schedule

  • Pipe installation has begun on SE Harrison under the rose garden and is anticipated to be completed over the next few weeks.
  • Sewer pipe connections to the new pipe will follow this, and then work in the alleys to make connections to each home.
  • The final steps in construction are the storm drain connections.
  • Once all of the pipe connections have been made and the old pipe has been disconnected, the trench repair, restoration and paving will take place.

Construction schedules are subject to change due to underground conditions, weather, traffic impacts, subcontractor schedules and availability of materials.

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