MAILING ADDRESS: 1120 SW 5th Ave, Room 1000, Portland, OR 97204
Environmental Services continues construction on a project to repair or replace more than one mile of public sewer pipes in downtown Portland that are in deteriorating condition. Some of the pipes were among the first built in Portland, before the 1880s. These improvements will protect reduce the possibility of sewage releases to buildings and streets and help protect the Willamette River watershed.
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 project is generally located in the Portland State University (PSU) area and is bounded by SW Mill Street to the north, I-405 to the south, SW 16th Avenue to the west, and SW Harbor Drive to the east. The project also includes work on W Burnside and SW Columbia streets.
Construction is expected to be completed by June 2020.
Below is the anticipated construction schedule for the next two weeks. This schedule may change due to emergencies, weather, conditions underground, subcontractor schedules, materials availability, and other factors.
Portland State University posts campus-wide impact notices at www.pdx.edu/facilities/facility-impact-notices.
The Rest of This Week (January 16-17)
Crews will repair service lateral pipes using Cured-in-Place-Pipe Lining (CIPP). This work will take place at night at the following locations:
Week of January 20
Crews will repair service lateral pipes using Cured-in-Place-Pipe Lining (CIPP). This work will take place at night at the following location:
Week of January 27
No work is scheduled this week due to materials and subcontractor availability.
The primary construction method to repair public sewer pipes in this project is Cured-in-Place-Pipe Lining (CIPP). The CIPP lining process occurs in phases, with work at each location expected to take less than a week.
When heat (steam) is used to cure or harden the liner during CIPP, people who are nearby may smell an odor that is often described as being similar to plastic or glue. The odor is from the chemical styrene, which is in the resin of the liner. The resin is the part of the liner that reacts with heat and hardens.
While unpleasant for some, the amount of airborne styrene generated by the CIPP process is not a health risk at the levels observed by the City of Portland and tested and monitored by an independent industrial hygienist. The odor dissipates quickly once the process is complete.
If your building is connected to the sewer line being repaired, you can help prevent the styrene odor from entering your home or building by pouring water down all floor drains, sinks, and tubs to ensure that a water barrier is maintained in each drain’s “P-trap.” If this does not prevent odors from entering your home, you may need to temporarily seal the drain by placing a plastic bag filled with water over the drain or taping over it. These temporary measures will prevent the backflow of odors.
If there is already a strong odor in your home, opening windows can improve ventilation and help diminish these odors. If the odors are stronger outdoors, closing windows can prevent these odors from entering your home or business.
Environmental Services will work directly with the community throughout the course of the project. Community outreach staff will listen to your suggestions and respond to your concerns. We encourage you to:
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.
Including the project description, map and schedule
Check out current and previous communications about the project