NE 45th St Pedestrian Bridge Seismic Retrofit

Updated September 20, 2024

What's Happening Now?

We’ve completed work on retrofits to help the NE 45th Street Pedestrian Bridge better withstand earthquakes! The bridge will be fully reopened for people walking, biking, and rolling by September 20.  Over the last 4 months, we: 

  • Installed carbon fiber wrapping to strengthen the bridge's beams and superstructure 
  • Strengthened foundations with reinforced concrete 
  • Repaired the damaged shear key at the south abutment
  • Painted the Bridge with two coats of epoxy based paint and anti graffiti coating

Thank you for helping us improve the resiliency of the NE 45th St Pedestrian Bridge! If you have any remaining questions or concerns about the NE 45th St Pedestrian Bridge Seismic project, please contact us at 206-684-ROAD (7623) or 684-Road@seattle.gov. 

Project overview

NE 45th St Ped Bridge Map Overview

Earthquakes could have a major impact on Seattle’s infrastructure. To address seismic risks to city infrastructure, the City of Seattle established a bridge seismic program to assess how vulnerable the City’s bridges were to earthquakes, and to retrofit bridges to better withstand the potential impacts of an earthquake.

As part of the Levy to Move Seattle, 16 bridges were selected for seismic retrofits, including the NE 45th St Pedestrian Bridge. The NE 45th St Pedestrian Bridge is an older bridge built prior to modernizing the seismic design code. The bridge provides a more direct connection across NE 45th St for the Laurelhurst neighborhood. 

The seismic retrofits to NE 45th St Pedestrian Bridge included several modifications to strengthen existing bridge components and reduce the bridge’s vulnerability to earthquakes. The following were major construction elements: 

  • Installed carbon fiber wrapping to strengthen the bridge's beams and superstructure 
  • Strengthened foundations with reinforced concrete 
  • Repaired damaged shear key at the south abutment 

Project schedule* 

30% Design  Complete 
60% Design  Complete 
90% Design  Complete 
Final Design  Complete 
Construction begins  June 2024 
Retrofit complete September 2024

Funding 

The project was funded through the Levy to Move Seattle. Approved by voters in 2015, the 9-year, $930 million Levy to Move Seattle provides funding to improve safety for all travelers, maintain our streets and bridges, and invest in reliable, affordable travel options for a growing city.  

Materials 

Translation and interpretation 

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Transportation

Greg Spotts, Director
Address: 700 5th Ave, Suite 3800, Seattle, WA, 98104
Mailing Address: PO Box 34996, Seattle, WA, 98124-4996
Phone: (206) 684-7623
684-Road@seattle.gov

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The Seattle Department of Transportation (SDOT) is on a mission to deliver a transportation system that provides safe and affordable access to places and opportunities for everyone as we work to achieve our vision of Seattle as a thriving, equitable community powered by dependable transportation.