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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

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NW Northrup Sewer Repair Project

Updated February 2020

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City of Portland Environmental Services – your sewer and stormwater utility - is designing a project to repair nearly 260 feet of 130-year-old public sewer pipe under NW Northrup St between NW 22nd and NW 21st avenues. Multiple tree roots have grown into the pipe causing it to deteriorate. Repairing the sewer now will reduce the possibility of costly breaks, sink holes and sewage releases to homes, businesses and streets.


Construction is anticipated to begin in early March and be completed by July. 

Work Hours  

A mix of daytime and night time work will occur. Due to high traffic volumes and Portland Street Car operations in this location, the Portland Noise Office has granted the project a noise variance to work past daytime construction hours of 7 a.m. to 6 p.m. at locations identified on the map:  

  • Pipe Work (extended work hours): Extension of a few hours past 6:00 p.m. for four nights.  

  • Night Work: Work between 6 p.m. and 7 a.m. for three nights 

  • Weekend Work: work on Saturdays and Sundays may occur for select activities periodically throughout construction. 

You will receive additional notifications before night work starts.  

What to Expect During Construction 

  • Noise, Vibration, and Dust could disrupt normal neighborhood activity 

  • Traffic Delays are expected in and near the work area.  

  • Driveway Accessmay be temporarily blocked when crews are working in front of your house or business. 

  • No Parking or little parkingwill be allowed in and near work zones, especially during work hours.  

  • Equipment Storage will occur in the work zone and on nearby streets overnight.  

  • Sewer, Water, and other utilities are expected to remain in service during construction.  

Construction Method 

Crews will primarily use a trenchless construction method called Cured-in-Place Pipe-Lining (CIPP). CIPP requires little to no digging and significantly less time to complete than other sewer repair methods. Open-trench excavation and pipe bursting will also be used in some sections of the work. To learn more about sewer construction methods go 

For More Information 

We are working closely with nearby businesses to minimize impacts to their operations. We will send more notifications during construction. For more information, or if you have questions or concerns: 

  • Sign up for email updates by emailing or click Sign Up on the project webpage 

  • Contact Ning Jiang 503-823-6006 or