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Project Details

St. Johns Bridge Maintenance

Design Phase

Region 1: Portland metro and Hood River County (Portland, Multnomah)

This August, we will begin maintenance work on the St. Johns Bridge. The work will improve the strength of the bridge by applying steel reinforcement to the framework under the bridge. Work will not be visible from the top of the bridge, however scaffolding will be visible from below. The new steel will match the existing paint color.

The work is expected to last 60 days and will require a full 24/7 sidewalk closure on one side of the bridge at a time. One sidewalk on the bridge will be open at all times. Work is expected to be complete in October 2019 but is subject to change based on weather and site conditions.​​


Traffic Impact

There will be a temporary speed reduction on the bridge to maintain a safe environment throughout the construction zone.​

The St. Johns Bridge will remain open to vehicles during the project.​ In addition to the temporary speed reduction, we are expecting up to five nights of single lane closures on the St. Johns Bridge from 10 p.m. to 5 a.m.

Impacts to People Who Walk, Roll and Ride Bicycles

The St. Johns Bridge will remain open to pedestrians and bicycles during the project. People who walk, roll and ride bicycles on the sidewalks of the St. Johns bridge will share one sidewalk when the other sidewalk is closed for 30 days at a time for the duration of the 60-day project. There will be a temporary pedestrian access route to guide pedestrians and bicyclists on the sidewalk across the bridge during construction. People on bikes can also choose to ride in the vehicle travel lane.

Lane and Sidewalk Closure Details

Park, river, and railroad users will not be affected. One travel lane on the bridge will close to traffic for five nights between 10 p.m. to 5 a.m. Full closures of the bridge sidewalks will allow equipment to be set up for the work areas under the bridge. Sidewalk closures will occur 24/7 for 30 days at a time on each side of the bridge. When work shifts to the other side of the bridge, a second full sidewalk closure will be in effect for 30 days. One sidewalk on each side of the bridge will remain open at a time.

Image of a cross-section of traffic flow during St. Johns Bridge maintenance.


Construction Impacts

What You can Expect to See

Work will be performed on scaffolding under the bridge. It will not be visible from the top of the bridge. Workers will use the closed portion of the bridge sidewalk to stage the equipment and tools used in the project. While people using the Willamette River, the railway or Cathedral Park won’t have travel impacts, they may notice temporary scaffolding beneath the bridge while the project is underway. Temporary pedestrian routes and construction signs will be visible on the bridge.

Construction Noise

Daytime construction noise will occur periodically from heavy equipment, construction trucks, beeping vehicle reverse noise (a requirement by the Occupational Safety and Health Administration), and other equipment, such as generators, compressors and pneumatic tools. Those working or living in the area may be affected. All of the work will happen during the day.​


  • Be patient. Walk, drive, roll and bike safely.
  • Stay alert. Watch for temporary construction signs, and pedestrian and bicycle routes on the bridge.
  • Share the sidewalk. Be courteous to other people who are walking, rolling and biking on the bridge.
  • Walk your bike. When passing other pedestrians on the sidewalk, we strongly recommend walking your bike.



U.S. 30BY | ​St. Johns Bridge in N. Portland.

Cost and Funding

​In development


Maintaining the safety of our roads: This work will maintain long-term safety by ensuring the bridge can continue serving thousands of travelers a day.

What Problem Will This Improve?

Due to changing vehicle weights, bridge load ratings need to increase to meet current design standards. By adding more steel reinforcements on the bridge’s structural framework, bridge stability is improved and the bridge will be more capable of carrying increased traffic.

Contacts & Media

Project Contacts

Community Affairs Coordinator
Lili Boicourt

Community Affairs Coordinator
Ellen Sweeney

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Last Updated

8/12/2019 4:50 PM

Project Number


Project Documents

Related documents to this project
BridgeStrengthening_Newsletter_StJohns 8.5x11_8.7.19.pdfAugust 2019 project updates for St. Johns Bridge maintenance.

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