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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Ave, Suite 613, Portland, OR 97204

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SW Washington Street: Park Ave to 10th Sewer Repair Project


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The City of Portland’s Bureau of Environmental Services is continuing our work to repair and replace critical sewer and stormwater infrastructure. Environmental Services will continue to provide information and updates on construction schedules and activities during the COVID-19 emergency. 

Updated June 2, 2020

Environmental Services is constructing repairs for a public sewer service lateral in SW Washington Street between SW Park Avenue and SW 10th Avenue in downtown Portland. This service lateral connects an adjacent property to the mainline public sewer pipe that crews repaired earlier this year. Repairs will help prevent sewage backups into buildings and streets.

This project is part of the larger Downtown-Old Town Sewer Repair Program managed by Environmental Services to assess the condition of and repair the public sewer system serving Downtown and Old Town Portland. The program represents millions of dollars in investments. Ultimately, these improvements will extend the life cycle of downtown sewer infrastructure by more than 50 years.


The public sewer mainline repaired is in the north side of SW Washington Street between SW Park and SW 10th Avenue.

Project Map


The sewer repair work that was scheduled for June 2 and June 3 has been postponed due to downtown worksite safety concerns. An update will be posted once work is rescheduled.

What To Expect During Construction

Crews will use the Cured-in-Place-Pipe Lining (CIPP) method to repair the lateral. This method does not involve digging in the street.

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

This work will require temporary lane closures in the west lane of SW 10th Avenue and in the north lane of SW Washington Street.

The short-term parking spaces currently designated for customer pickups from downtown retailers will remain in place through construction.


Crews have successfully completed the following improvements for this project:

  • Removed roots in the existing mainline public sewer pipe
  • Installed 435 feet of pipe lining to repair the public sewer pipe
  • Installed liners to repair three lateral sewer connections

One additional lateral sewer connection remains to be repaired. The geometry of the existing lateral was not conducive to standard repair methods. Engineers studied the problem to determine a new construction method.

Stay Informed

Environmental Services will work directly with adjacent properties throughout the course of the project. Community outreach staff will listen to your suggestions and respond to your concerns. We encourage you to:

  • Sign up for email updates by clicking the SIGN UP button and selecting the SW Washington Street: Park Ave to 10th project from the dropdown menu.
  • Visit this project webpage for periodic updates and use the shortcut
  • If you have a question about the project, call the hotline at 503-823-5315, stating that SW Washington is your area of concern. Your call will be returned by the next business day.
  • If you have a nighttime construction noise complaint, call 503-823-1338, stating that SW Washington is your project of concern.
  • Email city outreach staff
  • For a list and maps of other downtown sewer projects, visit

Sewer Emergencies

In the event of a sewer backup or basement flooding, call the Maintenance hotline immediately at 503-823-1700. It is staffed all hours and all days, 24/7.

Project Overview

Including the project description, map and schedule

Community Outreach

Check out current and previous communications about the project