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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

Grant Park Sewer Repair

August 21, 2014

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.


The following work is anticipated over the next weeks. Please be aware that this schedule is subject to change due to conditions underground, weather, traffic impacts, availability of materials or other factors. We will continue to keep you updated.


  • Construction crews are working on NE Broadway between 32nd and 30th avenues and construction has closed Broadway at NE 32nd Avenue. The intersection should re-open soon.
  • Beginning the week of August 25, the intersection of NE Broadway and NE 30th Avenue will close during construction hours, 7:00 a.m. to 3:00 p.m. Monday through Friday. Work at this intersection will take up to two and a half weeks. Motorists will be able to access residences and businesses south of Broadway using NE 32nd, which will soon be reopened, or NE 28th. Please watch for signs and follow direction from flaggers. Flaggers will assist pedestrians at this busy intersection.
  • Watch for no parking signs; these will begin to move to accommodate the work zones and alternate accesses to businesses.
  • 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.
  • Due to the Labor Day holiday, there will be no work from noon on Friday, August 29 through Monday, September 1.
  • Motorists should expect delays on NE Broadway, but one lane in each direction will remain open at all times and two lanes in each direction will be open by the afternoon commute. Work on NE Broadway should be completed in September.
  • TriMet will temporarily relocate bus stops along NE Broadway as needed during the summer.


The contractor is scheduling work on residential streets, including pavement restoration work on U.S. Grant Place, and returning to complete the work started on NE Hancock Street. The work on these streets will likely occur after work in NE Broadway is complete.

Map of construciton phases on Broadway


Grant Park Sewer Repair Project 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. There will be night work on NE Broadway at 33rd Avenue in July.

  • Construction will create noise, vibration and dust and will disrupt normal neighborhood activity.

  • 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 green safety vest with “City of Portland” across the back and a hard hat.

  • 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.

Sewer Construction Methods

The city will use 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.