information
Storm damage recovery

SE Stark Trunk Sewer Project

Sewer and Stormwater
Active
Environmental Services is constructing a project to repair a large-diameter sewer pipe that runs along SE Stark Street between SE 6th Avenue and the Willamette River. The pipe known as the "Stark Trunk" is over 110 years old and is in need of repair to prevent sewer and stormwater overflows.
This work will be completed in two phases. Construction on Phase I began June 2022 and was completed in December 2022. Construction on Phase II is expected to begin late spring 2024 and take about six months to complete.
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The Stark Trunk is a large sewer pipe that is showing signs of deterioration and needs to be repaired. These repairs will extend the service life of the trunk by 60 years or more, increase sewer resiliency to earthquake damage, and help protect public health and the community by preventing sewage releases to buildings and streets. 

Project Area 

This project includes two phases. A stormwater diversion structure on SE 3rd Avenue between SE Stark Street and SE Washington Street is complete. Sewer pipe repair on SE Stark Street from SE Water Avenue to SE 6th Avenue will occur in late spring 2024.

Map showing sewer construction locations on SE Stark between Water and 6th

General Schedule

The project will be completed in two phases.

Phase 1: Stormwater Diversion Structure - Complete

Phase one constructed a stormwater diversion structure on SE 3rd Avenue between SE Washington Street and SE Stark Street. 

Phase 2: Pipe Work - Spring 2024

Phase two will repair the sewer pipe on SE Stark Street between SE 6th Avenue and the Willamette River. Phase two is expected to start in late spring 2024 and take about six months to complete. See project area map for location of the pipe work.

Traffic Impacts

During phase two in 2024, SE Stark Street at SE 2nd Avenue is expected to close for two to four weeks. There will also be three areas on SE Stark Street between SE Water Avenue and SE Grand Avenue with temporary one-lane closures during construction. (See map above.) We will share detour information and specific timeframes for lane and street closures as more information becomes available.

Businesses Open During Construction

While you may experience delays reaching your favorite businesses, we encourage you to continue to support them during construction.

What’s Happening Now?

Over the next several months, crews will conduct a variety of activities, including pipe and maintenance hole inspections, root removal, pipe cleaning, survey work, utility locates, and soil and pavement sampling throughout the project area. These activities may temporarily disrupt and delay traffic and will occur over time, not all at once. These activities will help to avoid conflicts with other underground utilities during construction, including water, gas, and telecommunications lines. 

Nearby Project at SE Oak and 2nd Starting in November 2023

Environmental Services has designed a separate project to repair 200 feet of main public sewer pipes on SE Oak Street between SE 2nd Avenue and the railroad tracks. This project will reduce the possibility of sewage releases to homes, businesses, and streets. Construction is expected to start in November 2023 and take up to three months to complete. Visit www.portland.gov/bes/2ndOak for more information.  

Construction Methods

The City’s contractor will use several construction methods to repair the sewer pipe. Some areas will require digging access pits to install the pipe.  

Construction methods may include the following:  

  • Sliplining and Spiral Wound Pipe Lining are mostly trenchless and require less digging and often less time to complete than other sewer repair methods.  

  • Open Trench Excavation to dig small trenches to replace short sections of broken pipe before repairing the entire mainline sewer pipe, and to construct sewer service laterals and access pits. 

What to Expect During Construction

You can expect the following activities and impacts during construction:

  • Noise, Vibration, and Dust: Construction creates noise, vibration, and dust and disrupts normal neighborhood activity.
  • Equipment Storage: Equipment and materials may be stored on streets overnight.
  • No Parking: Little or no on‐street parking will be allowed in and near work zones, especially during work hours. On days when crews will be working in front of your house or nearby, please plan ahead. If you park your vehicle on the street, plan to move it off the street by 7 a.m. and return it at 6 p.m.
  • Traffic Delays: Expect traffic delays in and near the work area.
  • Lane Restrictions and Street Closures: It is too soon to know exactly what traffic controls will be necessary to set up a safe work zone and construct the sewer improvements. The contractor will develop detailed traffic control plans before construction begins at a location.
  • Pedestrian Access: If temporary crosswalk and sidewalk closures are necessary, signage will indicate the alternate way for pedestrians to proceed. 
  • Services Maintained: Sewer, water, and other utilities are expected to remain in service during construction.
  • Work Hours—Work hours are 7 a.m. to 6 p.m., Monday through Friday. Sometimes we work on Saturdays from 7 a.m. to 6 p.m. When weather forecasts predict high temperatures, crews will begin at 6:00 a.m. 

We Want to Hear from You

Environmental Services will inform residents and businesses about project activities and respond to questions and concerns in a timely manner. We encourage you to:

  • Visit this project webpage regularly for updates. 
  • With questions or comments, please contact Matt Gough by email or phone 503-823-5352.
  • If you have a question or concern, please be sure to include your name, property address, and project name (Stark Trunk) in your voicemail and email so we can provide you more details about what to expect in front of your property.
  • If your basement sewer backs up or your property or street floods, please report it immediately to the City’s Maintenance Operations hotline at 503-823-1700. It is staffed 24/7, all hours and all days.

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Sign up for periodic email or text message updates through our free GovDelivery subscription service. These updates are the best way to stay informed about what’s happening and what to expect. You can also sign up for bulletins on other projects and topics.

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This project will help protect the health of the Williamette River Watershed.

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