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What’s Happening Now
We are writing to share some exciting news: the project is nearing the finish line! Crews have completed drilling and grouting and will take a break until the end of 2025. They will return in early 2026 to install permanent paving. Our staff and crew want to express our deepest gratitude for your patience and support while we made these important repairs.
We will send an update later this year with an update on our schedule for 2026.
Construction Impacts
Work Hours: Overnight work hours will be from 7 p.m. to 6 a.m. Monday through Friday.
Duration: Work will occur in phases—grouting, temporary pavement, and permanent repaving.
Equipment Storage: Some equipment and materials may be stored overnight on your street, nearby streets, or other public right-of-way areas.
Periods of Inactivity: Work will occur in phases, and there may be periods of inactivity between phases. A variety of factors, including conditions underground, weather, subcontractor schedules, and availability of materials may affect the schedule.
Maintained Service: Water and other utilities will remain in service during construction. For more information about the approved night work and the anticipated noise levels, visit the project webpage.
Crews drilled vertical holes in the work area and pumped grout into the holes. Grout filled voids, compacted the ground, and improved the strength of the soil under the street pavement. Crews have put temporary pavement over the holes. Crews will return in 2026 to install permanent paving.
We Want to Hear from You
Here are ways you can stay informed and let us know your questions and concerns:
- Project Webpage: Visit this project webpage for updates using the shortcut www.portland.gov/bes/grandave.
- Questions: The communications firm PRR is assisting city outreach staff. Contact Love Lee via email at llee@prrbiz.com or by phone at (206) 462-6395. Be sure to include your name, business name, property address, and project name (Grand Ave Riser Stabilization) in your messages so we can provide you with details about what to expect near your property.
- Nighttime Construction Noise Complaint: Call the noise hotline at 503-823-1338, stating that Grand Avenue Riser Project is your area of concern. The noise hotline is monitored by site inspectors.
- Sewer Emergency: In the event of a sewer backup or basement flooding, call the City Maintenance hotline immediately at 503-823-1700. It is staffed all hours and all days, 24/7.
Project Background
One of Environmental Services’ large sewer tunnels is buried deep under Grand Avenue. Vertical pipes called risers, travel up from the sewer to the street. Risers allow workers to access the tunnel for maintenance. The soil between the tunnel and Grand Avenue is moving and settling. Environmental Services’ tunnel and risers do not move. They stick up into the roadway while the earth settles around them. This makes for a bumpy ride for people driving on Grand Avenue.
The Grand Avenue Riser Stabilization Project will stabilize the soil and roadways around the tunnel’s risers. Going forward, the city will have to do less maintenance work to level out low points on Grand Avenue. This long-term fix means fewer traffic disruptions for nearby businesses and the traveling public.
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