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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

More Contact Info

Slabtown Sewer Replacement Project

Updated January 23, 2019

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Environmental Services is continuing construction on the Slabtown Sewer Replacement Project in NW Portland (between NW Thurman and Overton and 12th to 21st). The project is repairing 8,400 feet (more than one and a half miles) of sewer mains in streets, some of which are more than 115 years old and deteriorating due to age. Our crews will repair service connections that connect properties to the sewer system, replace stormwater inlets and inlet pipes, and repair or replace more than 46 manholes throughout the project area. Taking these actions now will help protect the public and the environment by reducing the possibility of costly breaks, leaks, blockages and sewage releases to homes, businesses and streets.

Current Construction Map

Developments of Note

Due to conditions underground, construction has been moving at a slower rate than expected. Safety for the crew and people living and working in the area is a priority. Thank you for your patience as we perform this necessary sewer repair work.

Construction Schedule  

Work on each block will be conducted in multiple phases with periods of inactivity between each phase, typically ranging from a few days to a few weeks. Please be aware that schedules are also subject to change due to a variety of factors, including conditions underground, weather, traffic impacts and subcontractor and materials availability.

Week of January 21:

  • Crews will finish installing the main sewer line in NW Quimby between 15th and 16th avenues.
  • Once the mainline between 15th and 16th avenues in Quimby is installed, our crews will install a manhole at the intersection of NW 16th and Quimby.
  • Crews will begin installing the main sewer line in NW Quimby between 16th and 17th avenues.

Week of January 28:

  • Crews will continue to install the main sewer line in NW Quimby between 16th and 17th avenues.
  • Once the mainline between 16th and 17th avenues in Quimby is installed, our crews will begin to install a manhole at the intersection of NW 17th and Quimby.

Week of February 4:

  • Crews will continue to install a manhole in the intersection NW 17th and Quimby.
  • Once the manhole is complete at the intersection of 17th and Quimby, crews will install catch basin laterals and sewer connections on Quimby between NW 15th and 17th avenues.

Construction Methods

Open trench construction will be used for this project. Open trench construction is the traditional and most common method of sewer construction and consists of excavating the existing pipe, replacing or repairing it, and the refilling the trench. For more details and photos about this and other construction methods, visit

To learn what to expect during construction, visit

We want to hear from you

We would like to know about the access needs at homes and businesses in the area, as well as any parking concerns, delivery schedules or other information you would like to share. Please feel free to fill out our online business survey or contact us directly (information below).

For More Information

With questions, comments or concerns about business operations, medical issues or deliveries, please contact Joe Tursi at or 503-823-5753. To sign up for periodic email updates, click the Sign Up! button or email Joe with “Slabtown” in the subject line.

Slabtown Sewer Project Business Survey

Environmental Services is seeking feedback from businesses in the project area