The Steamboat Slough Bridge was built in 1927 and rebuilt in 2003. This bridge is one of four operating swing spans remaining in Washington and it was the last of its kind to be built in the state.
The bridge started life in 1927 as part of US 99 with a single lane in each direction and 2,500 vehicle trips per day. In 1954, an additional bridge was built across Steamboat Slough providing two lanes for north and southbound traffic. In 1971, the Washington State Legislature renamed US 99 to State Route 529. Today the Steamboat Slough Bridge carries 32,000 vehicles a day.
The purpose of this project is to protect the bridge from corrosion damage with a new coat of paint and maximize its useful life.
This is one project in a series of twenty projects scheduled to help preserve bridges and improve interchanges in the Everett, Marysville, Lake Stevens area starting in 2023 and continuing through 2026.
10 projects begin 2023-2024
This project: SR 529/SB Steamboat Slough Bridge - Bridge Painting
SR 9 - SR 204 Intersection Improvements
I-5/NB Lowell Rd to Snohomish River - PCCP & Expansion Joints Rehab
I-5 - NB Marine View Drive to SR 529 - Corridor and Interchange Improvements
I-5/Snohomish River Bridge (BN RR) – Painting
SR 529/Snohomish River & Steamboat Slough - Bridge Repair, Rehab & Paint
SR 9/Marsh Road to 2nd Street Vic - Widening & Bridge Painting
SR 9, SR 528 to 132nd St NE Vic Paving with Exceptions
SR 96 – North Creek – Fish Passage
US 2/Bunk Foss Creek to Pilchuck River – Fish passage
SR 9/Bunk Foss Creek & Cemetery Creek – Fish Passage
Two projects begin in 2024-2025
I-5 - SR 528 - Marine Drive and 88th St. NE Interchanges - Tulalip Tribes lead
SR 526/Corridor Improvements
Seven more projects begin 2025-2026
SR 529/Union Slough & NB Steamboat Slough Bridges - Scour & Bridge Rehab
I-5/SB Ebey Slough/SR 529/Railroad Bridge - Pier Column Repair
I-5/Steamboat Slough Bridge - Special Bridge Repair
I-5/SB Ebey Slough Bridge – Painting
US 2/WB Snohomish River Bridge - Bridge Painting
SR 529/Snohomish River Bridge - Special Bridge Repair & Painting
SR 99/148th St SW Vic to Evergreen Way - Corridor Improvement
$11.4 million from Pre-Existing Funds (PEF).
Bridge painting projects are complex efforts. This graphic shows many of the elements that may be needed to perform bridge painting.
This is one project in a series of twenty projects scheduled to help preserve bridges and improve interchanges in the Everett, Marysville, Lake Stevens area starting in 2023 and continuing through 2026:
Learn how we preserve, inspect and rate the condition of Washington state bridges.