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Sewer (Stock image: Silenzio76)
City of Portland Environmental Services
Published: 24 July 2017

Environmental Services continues construction on a project repairing or replacing 17,000 feet (more than 3 miles) of public sewer pipes in the Humboldt neighborhood that are on average 85 years old and in deteriorating condition. This project will protect public health and our environment by reducing the possibility of sewage releases to homes, businesses and streets.



On July 27, overnight Cured-in-Place Pipe-Lining (CIPP) will occur on North Kerby Avenue between Killingsworth and Jarret streets.

  • The lining process will begin Thursday evening and be will be completed by 7:00 a.m. Friday morning.
  • Other CIPP is expected to be completed during normal construction hours, but evening work may be needed to allow the liner to fully cure.
  • To view photos and learn more about the CIPP construction method go to www.portlandoregon.gov/bes/PipeLining.

Crews will continue spot repairs, cleanout installation, and lateral sewer pipe construction in multiple locations.

  • These smaller phases are being completed to prepare for Cured-in-Place Pipe Lining (CIPP) that will begin next week and continue throughout the summer.
  • The contractor will continue to apply temporary pavement to areas excavated for spot repairs. Final trench paving and concrete restoration work of these areas will occur as crews become available.



The map posted at www.portlandoregon.gov/bes/Humboldt shows the anticipated construction locations through August 4. Please be aware that schedules are subject to change due to a variety of factors, including conditions underground, weather, traffic impacts and subcontractor and materials availability.

Residents and businesses should expect periods of inactivity between each phase, ranging from a few days to a few weeks. The duration depends on a variety of variables including underground conditions, weather, traffic impacts, subcontractor schedules, quality control tests and availability of materials. To learn more about What to Expect During Construction go to www.portlandoregon.gov/bes/article/632833.



While most work as part of the Humboldt Sewer Repair project can be completed during normal daytime construction hours, Environmental Services received a noise variance to allow extended construction hours to complete main sewer pipe repairs using the Cured-in-Place Pipe-Lining method (CIPP).

During CIPP repairs, work crews access the sewer from manholes to insert a flexible liner inside the old pipe. Hot water or steam inflates and cures the liner, which gradually hardens to form a rigid, smooth surface that seals cracks and restores the pipe to near-new condition. Once crews begin CIPP construction they must continue the process until the liner is fully cured, which may require working late into the evening at some locations. 

In some cases, where water usage by businesses, apartment buildings, and schools creates heavy flow in sewer pipes, crews must begin the process in the evening and work overnight when less water is being used. Large amounts of water coming into contact with the liner can impair the curing process. 

To view a map of potential CIPP night work locations go to www.portlandoregon.gov/bes/article/636408.



Visit the project web page at www.portlandoregon.gov/bes/humboldt

or contact Matt Gough at 503-823-5352 or matthew.gough@portlandoregon.gov.  


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