Skip to Main Content View Text-Only

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

More Contact Info

Concordia Sewer Repair Project

Updated July 12, 2018

Environmental Services continues construction of a sewer project to replace or repair up to 16,000 feet, or about 3 miles, of public sewer pipes in the Concordia Neighborhood, plus a few blocks in Woodlawn and Beaumont-Wilshire. Most of the sewer pipes are 90-100 years old and are in deteriorating condition. The sewer repairs will improve sewer and stormwater infrastructure, increase sewer capacity, and reduce the risks of street flooding and sewage releases to homes, businesses, and streets.

Concordia Construction Map

Developments of Note

NE 26th Avenue between Ainsworth and Holman will be closed for street restoration for up to seven days. This involves preparing the street for restoration, pouring the wet concrete, and allowing the concrete to cure for up to seven days until it hardens to a strength that’s safe for cars and trucks to drive on. Street preparation will begin Tuesday, July 17th and full closure begins Wednesday, July 18th and should be reopened by Monday, July 23rd. It may be reopened Tuesday, July 24th if the concrete has not completed curing. This means no driveway access, and absolutely no vehicle access.

Construction Schedule 

Crews are in various stages of repairs or replacement on sewer mainlines or sewer connections to properties at the following locations for the next couple of weeks:

Week of July 16:

  • NE 31st Avenue from Killingsworth to Jarrett
  • NE 28th Avenue from NE Jarrett to mid-block
  • NE 35th Place and Killingsworth, east to mid-block
  • NE 27th, mid-block before and after NE Jarrett
  • Final paving for NE 25th from the alley to Holman, NE 24th, mid-block to Wygant, and concrete street restoration at NE 26th from the alley to Holman

Week of July 23:

  • NE 27th, mid-block before and after NE Jarrett
  • Concrete street restoration at NE 26th from the alley to Holman

*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.

Trench Paving Schedule Challenges: Did You Know?

The contractor patches trenches with temporary pavement after completing pipe installation in all work areas. We know that several streets in your neighborhood have had temporary paving, which can be rough and uneven, for an extended period.

Periods of inactivity ranging from a few weeks to a few months are common between completing repairs and final trench paving for a variety of reasons, but are most commonly due to paving subcontractor availability issues and weather.

Our contractor will be working to secure paving crews during dry weather and will take advantage of unexpected openings in paving crew schedules to complete work as timely as possible.

Methods of Construction

In some areas, crews are making smaller repairs in locations of the pipe (spot repairs) to prepare for a trenchless sewer repair method called Cured-in-Place Pipe-Lining (CIPP). CIPP lining is a trenchless method that requires little or no digging and significantly less time to complete. Work crews access the sewer from manholes to insert a flexible liner inside the old pipe. The liner is inflated with air and exposed to ultraviolet light (UV) to gradually cure and harden the liner. As the liner hardens, it forms a rigid, smooth surface that seals cracks and restores the pipe to near-new condition.

 The CIPP work will happen later in the project.

 To learn more about different methods of construction, go to

What to Expect During Construction

  • Work on each block will be conducted in multiple phases with periods of inactivity between each phase ranging from a few days to a few weeks.

  • Except for night work, construction hours will be 7:00 a.m. to 6:00 p.m. Monday through Friday. The contractor may also schedule work during the same hours on Saturdays.

  • Construction creates noise, vibration, and dust and disrupts normal neighborhood activity.

  • The contractor will maintain local access, but construction may impact normal use of your driveway or entrance to your business.

  • You should expect traffic delays in and near the work area. Please observe traffic control signs and follow the directions of flaggers.

  • On‐street parking will be restricted in and near the work zones to create a safe work environment and to stage equipment and materials.

  • A city inspector will be on-site during work hours and may be able to assist you with an immediate need during construction.

  • Sewer, water, and other utilities will remain in service during construction.