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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

I-5, SW Barbur, SW 26th Stormwater Management

July 1, 2014

When it rains, stormwater runoff from Interstate 5, SW Barbur Boulevard and SW 26th Avenue drains directly to Tryon Creek. Stormwater carries pollutants to the creek, and high runoff volume and velocities erode stream banks. This project will protect Tryon Creek water quality and help prevent stream bank erosion.

Environmental Services and the Oregon Department of Transportation have completed designs for a series of terraced stormwater rain gardens and collection pipes at this location (see map below). Construction will begin over the next few weeks.

Terraced rain garden project map

The rain gardens will collect sediments and pollutants before the water enters Tryon Creek. The project includes installing new pipes that will direct stormwater from various locations into the terraced rain gardens.

Construction Methods

The contractor will use open trench excavation and a trenchless method called jack and bore on this project. Go to the Construction Methods page to learn more about these construction methods.
All open trench pipe construction will take place during normal construction hours, 7:00 a.m. to 6:00 p.m. Monday through Friday. The city’s contractor will work at night using the jack and bore construction method to install pipe under Interstate 5. Nighttime work hours will be 8:00 p.m. to 5:30 a.m.

What to Expect During Construction

  • There will be noise, vibration, dust, traffic congestion, temporary parking loss, lane reductions, street closures in the construction zone, and disruption to normal neighborhood activity.
  • Daytime work hours are 7:00 a.m. to 6:00 p.m. Monday through Friday. The contractor may schedule work during the same hours on Saturdays.
  • There is night work as part of this project. You will be notified in advance of this phase of the project.
  • Some streets will close to through traffic during work hours, but the contractor maintains local access. You may experience delays getting to your home or business.
  • Parking is prohibited in work zones during work hours.
  • Some TriMet bus routes and bus stops will be relocated during construction phases. Go to to see schedule changes or call 503-238-7433.
  • Construction will not interrupt other utilities.
  • A city construction inspector is on-site during work hours. The on-site inspector may be able to help you with any immediate needs.
  • Equipment and materials will be secured on the street after work hours.

For More Information

Please contact Joe Annett at 503-823-2934 with any concerns such as maintaining driveway access, business operations, medical deliveries, etc. Get project updates by email by emailing Joe Annett with "SW Barbur" in the subject line.