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Project-Details







U.S. 30 Bypass: NW Bridge Ave. Rockfall Prevention

Design Phase

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


​​​​​​​​We are stablizing the hillside above NW Bridge Avenue (U.S. 30 Bypass) southeast of the west end of the St. Johns Bridge.  The project removes hazardous vegetation and loose rock, and installs pinned mesh to prevent future rockfall.


Impacts

Traffic Impact

The Ridge Trail Trailhead on NW Bridge Avenue will close ​from Feb. 29th – March 14th​.

Traffic delays are expected during peak hours from January 8 to July 2, 2024 approaching the St. Johns Bridge. Construction activities require a full, around-the-clock closures at NW Bridge Avenue southeast of the west end of the bridge and lane reductions on the bridge. NW Bridge Avenue northwest of the west end of the bridge will remain open. ​

The sidewalks and parking lot in the project area will also close during this time. Vehicle lanes on the St. Johns Bridge will be reduced to one lane in each direction. 

In January 2024, the intersection at Bridge Avenue on the west end of the St Johns Bridge will be controlled by flaggers for up to 2 weeks, during which time traffic will be held for up to 20 minutes at a time to remove debris.

The Ridge Trail Trailhead on NW Bridge Avenue will close for up to two weeks in January 2024.

Detours:

  • Local Travel: Travelers will detour using the northern section of NW Bridge Avenue to access U.S. 30 and the St. Johns Bridge. Detour map provided below.

    People traveling by bus on TriMet's Line 16 between Portland City Center, St. Johns and Sauvie Island will be impacted during construction for this project. Check trimet.org/alerts  during construction for more details.

  • Regional Travel: Regional freight traffic will be detoured on I-5 to the U.S. 30 (NE Lombard St.) interchange. Detour map provided below.​

 

Local Detour Map:

A detour map showing the closure area in red and the open detour route in green.

Regional Detour Map:

A detour map showing the regional detour on I-5.

Construction Impacts

​Construction is expected January 8 through July 2, 2024. Traffic impacts are expected approaching the St. Johns Bridge. During peak hours, traffic congestion may double if travel volumes remain the same. Travelers will be able to access a detour on NW Bridge Avenue northwest of the west end of the bridge.

Schedule

Construction is expected January 8 to July 2, 2024. 

Details

About

We are stablizing the hillside by NW Bridge Avenue in NW Portland by installing a pinned mesh system on the rock hillside above NW Bridge Avenue​ (U.S. 30 Bypass​) southeast of the St Johns Bridge. 

The project includes removing hazardous vegetation and loose rock, and installing a pinned mesh system to prevent future rockfall events. The pinned mesh system will be an extension of the 2022 emergency rockfall response work, pictured below.

A picture of crews installing a pinned mesh system.

Above: Above: Pinned mesh system is installed on the hillside by NW Bridge Avenue in 2022 in the emergency response to a rockfall event.

​ 
A picture of a pinned mesh system

Above: A close-up view of a pinned mesh system.​

Location

U.S. 30 |

​​NW Bridge Avenue (U.S. 30 Bypass)

Cost and Funding

​ $​3,463,704

Benefits

​Future rockfall events will be greatly minimized after a pinned mesh rockfall system is installed to stabilize the slope.

What Problem Will This Improve?

​This location has a history of known rockfalls. Within the past five years, there have been five rockfalls on the rock slope above NW Bridge Avenue (U.S. 30 Bypass).

We recently completed emergency rockfall repair work on this hillside in response to a rockfall event on January 5, 2022.  This project will make improvements to prevent additional rockfall in this area in the future.

More information about the emergency repair is available on the project website.

A picture of a rockfall event.

Photo: A picture of the rockfall event on NW Bridge Avenue in 2022.

Additional Information

For ADA (Americans with Disabilities Act) or Civil Rights Title VI accommodations, translation/interpretation services, or more information call 503-731-4128, TTY 800-735-2900 or Oregon Relay Service 7-1-1. 

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Other projects in the ar​​ea:


About: We are improving safety and preventing rockfall on NW Bridge Avenue (U.S. 30 Bypass) southeast of the St. Johns Bridge.  The project removes hazardous vegetation, scales loose rock and installs pinned mesh to prevent future rockfall.

About: We are improving the long-term safety and lifespan of the St. J​​ohns Bridge by repairing the concrete on the pier columns and arches under the bridge. Repairing the concrete will protect the bridge's steel internal frame and reinforcements from corrosion, maintaining the service life of ​this beloved Portland Historic Landmark.

About: We are improving safety and preventing rockfall on NW Bridge Avenue (U.S. 30 Bypass) southeast of the St. Johns Bridge.  The project removes hazardous vegetation, scales loose rock and installs pinned mesh to prevent future rockfall.

About: We are preparing to construct 26 stormwater treatment facilities near three highways in Portland to protect fish, wildlife, water quality, and public health. These facilities filter water runoff and reduce pollutants from entering the Willamette River. Each treatment system will be connected to existing stormwater systems to reduce cost by expanding the performance of our current system. 

About: The Oregon Department of Transportation (ODOT) is designing repair work to strengthen and lengthen the life of four culverts under U.S. 30 between NW Portland to Scappoose.​​​ 

Contacts & Media

Project Contacts

Community Affairs Coordinator
Ellen Waters
Email
Ellen.WATERS@odot.oregon.gov
Phone
971-336-1249

Public Information Officer
Don Hamilton
Email
don.hamilton@odot.oregon.gov
Phone
503-731-8265

Last Updated

2/23/2024 2:40 PM

Project Number

20522

Project Documents

Related documents to this project
20522 US 30 Corridor Mailer 12.2023 FINAL.pdfA mailer with updates on six projects near U.S. 30 and U.S. 30 Byway.