Skip to Main Content View Text-Only

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

More Contact Info

SW Yamhill-Morrison Sewer Repair Project

Updated August 17, 2018Button. Click to sign up for email updates

Environmental Services is continuing work to repair public sewer pipes in SW Yamhill and SW Morrison Streets in downtown Portland. Repairs to the 100 to 140-year-old sewer pipes will protect the public and the environment by reducing the possibility of sewage releases to buildings and streets.

Construction will continue this summer and fall, with work at each location taking less than a week.


This map shows the sewer repair locations for the SW Yamhill-Morrison Sewer Repair Project.

SW Yamhill-Morrison project map


Work at the following locations is anticipated to be completed between August and the end of September 2018:

  • SW Morrison St between SW 9th and SW 10th
  • SW Morrison St between SW Broadway and SW 6th
  • SW Morrison St between SW 2nd and SW 3rd
  • SW Yamhill St between SW 9th and SW Park
  • SW Yamhill St between SW Broadway and SW 6th

Construction schedules are dependent on weather and other factors. Rain may cause schedules to be shifted or postponed.

Traffic control areas and bypass setup will extend beyond the pipe repair locations.

What to Expect

Daytime work includes videotaping the pipe, cleaning the pipe, and doing small repairs. Crews will also set up the bypass service that will provide uninterrupted sewer service to all buildings. In the early evening, the pipe lining work will begin and will extend into the next morning as the new lining hardens in place. Then the service laterals to buildings will be reinstated and the bypass will be removed.

Traffic control areas and bypass set-up will extend beyond the pipe repair locations, which could affect traffic on neighboring streets slightly.

Work Hours

The Portland Noise Office granted Environmental Services a Noise Variance to enable the city's contractor to work at night to repair the public sewer pipes for this project. Pipe lining work will take place after 6 p.m. and before 7 a.m. to reduce traffic congestion, create a safer work zone, and allow time for the new sewer pipe lining to harden. Some work will occur during the day both before and after the pipe lining. The city's contractor may work on weekends as needed.

Cured-in-Place-Pipe Lining (CIPP)

To repair the public sewer in the locations shown on the map, the city will employ a process called Cured-in-Place-Pipe Lining (CIPP). Work crews access the sewer from manholes to insert a flexible liner inside the old pipe. Steam or ultraviolet light inflates and cures the liner, which gradually hardens to form a rigid, smooth surface that seals cracks and restores the pipe to near-new condition.

People who live and work near a CIPP repair project can sometimes smell a chemical odor during the pipe-lining work. The odor is from the chemical styrene, which is in the resin liner installed inside the pipe. The odor dissipates quickly once the installation process is complete. The amount of airborne styrene produced by the lining process is not expected to cause health issues for workers or the public. Click here for more details about CIPP.

Vactor trucks will be in the area to operate vacuum pumps necessary to clean the pipes prior to the lining and maintain sewer service during the lining. Vactor trucks generate noise and will be in place for up to several hours at a time.

Phases and Duration of CIPP Work

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
  • 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 service lateral connections and remove the bypass service

The CIPP work requires dry conditions to complete, so the schedule may fluctuate due to weather, conditions underground, traffic impacts, subcontractor schedules, and availability of materials.

Traffic Impacts

You can expect traffic delays, temporary lane closures, on-street parking removal, pedestrian detours, nighttime street closures, and flaggers as needed in the work zones. MAX light rail service will not be affected.

  • Accessing sewer pipes through manholes will require temporary street closures of one-to-two-block segments.
  • 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 sidewalk closures and pedestrian detours with local access provided by flaggers.
  • To avoid circling around construction to find parking, the city recommends you use SmartPark garages; those near our construction zone are included on the project map.

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.

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 Yamhill-Morrison) 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 Yamhill-Morrison" in the subject line of your email.

Downtown Open for Business

Environmental Services coordinates with multiple agencies to schedule and complete construction, minimize disruptions, and help people get to where they are going. Learn about other projects that affect the Central Business District at To avoid circling around construction to find parking, the City recommends you use SmartPark garages.

Project Overview

Including the project description, map and schedule

Community Outreach

Check out current and previous communications about the project