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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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SW Alder-Oak-Taylor Sewer Repair Project

Updated January 23, 2018Button. Click to sign up for email updates

Environmental Services will soon begin construction on a project to repair about 800 feet of public sewer pipes in downtown Portland that are 100 to 140 years old and in deteriorating condition. The sewer pipes are showing signs of cracks, breaks, holes, offset pipe connections, and obstructions, putting the pipes at risk of structural failure. Urgent repairs at three locations shown on the map below will protect the public and the environment by reducing the possibility of sewage releases to buildings and streets.


Repairs will be made in three locations (see map).

Project map


Construction is expected to begin mid-February and continue through May 2018. The timeline is subject to change due to weather, subcontractor schedules, and other factors.

Work Hours

Regular work hours will be 7 a.m. to 6 p.m. Monday through Friday, and Saturdays as needed. The Portland Noise Office granted Environmental Services a Noise Variance to enable the city’s contractors to work at night to complete the pipe lining sewer repair work. Each of the three locations will require one or two nights of work.

Construction Methods

This project will include both trenchless and trench excavation construction methods. To repair the main line sewer pipes, the city will employ a process called Cured-in-Place-Pipe Lining (CIPP). This process will insert a liner to strengthen and reinforce the pipes, making them last for many years. This work will occur at night, after 6 p.m. and before 7 a.m., when flows in the pipes are low. Doing this work at night will reduce traffic congestion, create a safer work zone, and allow time for the new sewer pipe lining to harden. Some setup and pipe cleaning work will occur during the day.

The CIPP sewer pipe lining process will occur in phases:

  • One day or night to set up the bypass service that will provide uninterrupted sewer service to adjacent buildings
  • One day or night to line the sewer pipe and cure the lining so it hardens in place
  • One day or night to reinstate the sewer service lateral connections to adjacent buildings
  • One day or night to line the service laterals and remove the bypass service

The spot repair in SW Oak Street just west of SW 1st Avenue will require digging a trench to relocate a water line and repair the sewer pipe. This work will occur during the day.

This project may also require some sawcutting and jackhammering to install cleanouts in multiple locations. This noisier work will be done during the day. Cleanouts are typically installed near the curb, but may also be placed in the sidewalk or near the building. They will be used to maintain sewer service during repairs and to provide access for future maintenance.

Anticipated Traffic Impacts

You can expect the following traffic impacts with this project:

  • Accessing the sewer line through manholes will require temporary street closures of one-to-two-block segments on SW Alder, SW Oak, and SW Taylor streets.
  • Where needed, local access will be provided by flaggers.
  • Access to and from driveways may be delayed.
  • Staging areas for materials and construction vehicles will be on cross streets and will require some lane closures and parking removal.
  • Bypass pumping to maintain sewer service during construction may require temporary crosswalk closures and pedestrian detours with local access provided by flaggers.

For More Information

If you have a question or concern, call the project hotline at 503-823-5315, leave a message, and your call will be returned by the next business day.

  • Visit this project webpage for updates using the shortcut
  • Sign up for email updates by clicking the SIGN UP button above and selecting SW Alder-Oak-Taylor Sewer Repair Project from the dropdown menu
  • Call the noise hotline at 503-823-8336 or the Portland Noise Office at 503-823-7350 to report concerns about nighttime construction noise
  • Email city outreach staff
  • For information about other projects in the Central Business District, go to To avoid circling around construction to find parking, please use SmartPark garages; those near our work zones are shown on the project map.

If you have a concern or question about a pipe repair near you, please be sure to include your name, business name, property address, phone number, and project name (SW Alder-Oak-Taylor) in your voicemail and email so we can provide you more details about what to expect in front of your property. Also, please write "SW Alder-Oak-Taylor" in the subject line of your email.

Project Overview

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