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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Room 1000, Portland, OR 97204

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Grant Park Sewer Repair

December 12, 2014 UPDATE

The Grant Park Sewer Repair Project will replace or repair about 11,500 feet of public sewer pipes that are between 89 and 104 years old and failing due to age. The project will increase sewer capacity and reduce the risks of street flooding and sewage releases to homes, businesses and streets. Construction should be completed by March 2015.

Current Construction Activities
Two crews are working on sewer and lateral pipe repairs in the area. Please be aware that construction schedules are subject to change due to conditions underground, weather, traffic, subcontractor schedules and availability of materials. As the contractor uses different equipment or specialized crews at each site, you will notice several work phases.

Sewer repairs underway or planned to start this month:

  • Lateral repairs and pavement restoration continues along NE Hancock and Schuyler streets. The contractor is also working to reduce the footprint of materials stored on the streets in this area.
  • The contractor will return at a later date to line the main line sewer pipe in NE Hancock and Schuyler streets using cured-in-place-pipe lining. Neighbors will be   notified in advance of that process.
  • Work on NE 26th Avenue between NE Thompson and NE Brazee streets is underway.
  • Work on NE 32nd Place between NE Thompson and NE Knott street is underway.
  • Lateral repairs on NE Hancock adjacent to Beverly Cleary School are planned for the school’s winter break, early on the weeks of December 22 or 29. The street will be closed to through traffic.
  • Spot repair on NE Brazee Street near NE 24th Avenue will begin soon.
  • Several spot repairs around NE Brazee Court and NE Brazee Street and NE 28th Avenue will begin      soon.
  • Work on NE 31st Avenue between NE Thompson and U.S. Grant streets will begin soon.
  • Spot repairs on NE Thompson Street and 30th Avenue will begin soon.
  • Spot repairs on NE Stanton Street near NE 31st Avenue will begin soon.

Holiday schedule and other schedule items of note:

  • Crews will not work December 24-26 or December 31-January 2.
  • The city’s contractor is allowed to but is typically choosing not to work on Fridays.

Since work started in June, one business on NE Broadway experienced a sewer backup. The city determined that roots in the property’s private sewer line caused the backup. Many of our houses have old pipes that could be affected by nearby construction like digging, so stay aware.

Access to school:

  • The parking lot on NE Hancock Street will continue to be accessible for staff, school deliveries, and student drop off and pick up.
  • Bus loading/unloading areas will not change.
  • Parking on NE Hancock Street will not be available. Families who drive should plan to enter the parking lot.
  • Families who are able to walk are encouraged to do so.

School work map

What to Expect During Construction

  • Work hours are 7:00 a.m. to 6:00 p.m. Monday through Friday, but the contractor may schedule work during the same hours on Saturdays.
  • Construction will create noise, vibration and dust and will disrupt normal neighborhood activity.
  • Minor tree trimming may occur in the public right-of-way.
  • Traffic control signs will be set up, and flaggers may direct traffic on higher-volume streets.
  • On-street parking in or near active work areas is prohibited during construction hours. Please plan to move your vehicle by 7:00 a.m. in work zones.
  • Equipment and materials may be stored on nearby streets overnight.
  • There may be periods of inactivity between construction phases.
  • A city inspector will be on-site during work hours and may be able to assist you with construction concerns. Inspectors typically wear a hard hat and a green City of Portland safety vest.
  • Please stay clear of all construction activities and keep children and pets out of construction areas.
  • You should receive a doorhanger notice a few days before work starts on your street.
  • Keep in mind schedules are always subject to changes due to weather, supply availability, or other issues.


Grant Park Sewer Repair Project Map

Sewer Construction Methods

The city is using a combination of open trench construction, cured-in-place-pipe lining (CIPP), and pipe bursting for this project. The contractor may use more than one construction method in some areas. For example, the contractor may use CIPP on the main public sewer pipe and open trench construction to repair or replace laterals that connect private sewers from the curb to the public sewer in the street.

Open trench installation is done in phases:

  • Saw cut pavement along the width of the trench
  • Remove pavement and existing material
  • Install public sewer pipe in the street
  • Backfill trench with sand or gravel
  • Replace laterals that connect private sewers to the system (from the curb to the street)
  • Restore surface temporarily with an asphalt patch
  • Complete final paving
  • Restore other areas disturbed by construction, such as sidewalks, driveway aprons and planting strips

Cured-in-place-pipe lining (CIPP) doesn’t require digging a trench. 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. People who live and work near a CIPP repair project sometimes smell a chemical odor during the pipe-lining work. The odor is from the chemical styrene, which is in the resin liner installed inside the pipe. The odor dissipates quickly once the installation process is complete. The amount of airborne styrene produced is not a human health risk.

Pipe bursting involves digging an access pit and inserting a bursting head into the existing sewer line. The bursting head breaks the old pipe apart and pulls the new pipe into place behind it. Construction crews retrieve the bursting head from a second access pit.

Thank you in advance for your cooperation during this project. Please let us know if you have concerns such as business operations, disability issues, or medical or business deliveries. As always, we’ll strive to provide quick response to your concerns, minimal disruption near your residence or business, and open and clear communication with you throughout the project.


For More Information

Contact Kristen Kibler with JLA Public Involvement  at 503-235-5881, extension 106, if you have concerns, such as maintaining driveway access, business operations, or medical deliveries, during construction.

Email Kristen  with "Grant Park" in the subject line to receive project updates by email. During construction, we will be sending regular email updates to keep you posted about the schedulem, construction activities, possible traffic detours and delays, parking restrictions and other impacts.