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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

October 17, 2014 Update 

The Grant Park Sewer Repair Project is replacing or repairing 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.

Schedule

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.

Developments of Note

  • Sewer repairs and pavement restoration on NE Broadway are now complete. Crews will return to line a pipe in NE 28th Avenue, affecting a lane or two of NE Broadway for one day. Thank you for your patience during work on this very busy street.
  • Work has begun on NE Schuyler Street west of NE 33rd Avenue, and will continue throughout the neighborhood into spring.

Upcoming Work

  • Beverly Cleary School (NE Hancock between 32nd and 33rd avenues) - Work will be coordinated with school and start this fall.
  • Traffic changes are anticipated on NE Hancock, temporarily making it one-way westbound. This will ensure parents and buses have adequate and safe access. The school will distribute additional information to families.
  • Please follow signage and directions from flaggers.

Reminder

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.

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.

Map of construciton phases on Broadway

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.