Project overview
The Snohomish River and Steamboat Slough bridges had wear and tear from 70 to nearly 100 years of service. Beginning in 2023, crews working for WSDOT rehabilitated a portion of the northbound SR 529 Snohomish River Bridge between Everett and Marysville by repairing or replacing steel truss elements, substructure elements, sway frames, timber sidewalks, cleaning and painting metal surfaces, and mechanical and electrical rehabilitation. Crews also completed work on the SR 529 Steamboat Slough bridges, repairing the mechanisms and balancing each of the bridges so they continue to open and close smoothly.
What to expect
Work is complete on this project.
This project includes work on the northbound Snohomish River Bridge and both directions on the Steamboat Slough Bridges.
In 2022, 32,000 trips were made across the bridges daily. The newest bridge in this project is more than 70 years old with the oldest approaching 100.
- The southbound Steamboat Slough Bridge was originally built in 1927 and rebuilt in 1993.
- The northbound Steamboat Slough bridge was built in 1954.
- The northbound Snohomish River bridge was built in 1927 and rebuilt in 1994.
This is one in a series of projects scheduled to help preserve bridges along the SR 529 and I-5 corridor between Everett and Marysville:
I-5 Snohomish River Bridge painting, completed in summer 2024
I-5 - NB Marine View Drive to SR 529 - Corridor and Interchange Improvements, scheduled completion fall 2025