8th Ave NW Bridge Seismic Improvements Project

December 14, 2018

What's happening now?

Our team is finalizing the design for the 8th Ave NW Bridge seismic improvements. Construction is anticipated to begin as early as spring 2019.

We are working with the nearby community and considering factors such as technical feasibility, cost, and efficiency, to inform the 2019 construction approach and associated timeline. 

To stay up to date with the latest project information, sign up to join our project email list. We will keep you updated by sending emails at major milestones. We will also work closely with neighbors who live near the project area to communicate the construction schedule and what to expect as construction approaches. 

Project overview

Seismic events could have detrimental effects on Seattle's infrastructure. To address seismic risks to city infrastructure, the City of Seattle established a bridge seismic retrofit program to assess the seismic vulnerability of the City's bridges and to prioritize limited funding to reduce this transportation infrastructure vulnerability. 

As part of the Levy to Move Seattle, 16 bridges were selected for seismic retrofits, including the 8th Ave NW Bridge. The 8th Ave NW Bridge is an older bridge constructed in 1950 prior to the modernization of the seismic design code. Spanning a forested ravine and connecting different parts of the Broadview neighborhood, it carries both vehicular and pedestrian traffic. 

The planned seismic retrofits to the 8th Ave NW Bridge include several modification to seismically strengthen existing bridge components and reduce overall seismic vulnerability. There will be construction equipment, noise, dust, and possible detours for the duration of the project to maintain a safe separation between people and the work site. 

Project Map

Map of 8th Ave NW Bridge

Schedule and construction*

  30% Design   June 2018
  60% Design   September 2018
  Final Design   January 2019
  Construction begins   Spring 2019

 

*The schedule is subject to change. 

Funding

The total project estimate is $3 million and is 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.

Get involved

We're committed to keeping you informed and working with neighbors to limit construction impacts to the extent feasible. Here are some more ways to get information about the project:

  • Email the project team at 8thAveNWBridge@seattle.gov
  • Leave a voicemail at 206-775-8734. A project representative will return your call. 

Materials

Project introduction and construction impacts letter (December 2018)