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In fall 2023, we added 4 feet of width to a sidewalk along northbound State Route 525/Mukilteo Speedway in Mukilteo to make it 7.5 feet wide on a bridge over the BNSF railroad tracks. We also added new ADA-compliant curb ramps and upgraded the railing between Second and First streets.

This project will repave, with Hot Mix Asphalt (HMA), and construct Americans with Disability Act (ADA) upgrades on State Route 525 from the SR 525 Spur, just north of Harbour Place, to 2nd Street. This project is subject to WSDOT’s Complete Streets requirements. Additionally, the paving project…

This project will remove three barriers to fish passage along Box Springs Creek, Maple Creek and Unnamed Tributary to Swamp Creek under State Route 525 near Lynnwood. Contractor crews working for WSDOT will remove existing culverts and replace them with fish-passable structures. These new…

Crews working for WSDOT will pave roughly two miles in both directions of State Route 525 from the Interstate 405 interchange to just south of 148th Street Southwest, as well as, eight ramps. The two bridges over Alderwood Mall Parkway and Maple Road will not be paved. Once contractor crews finish…

Portions of the State Route 526 corridor will be improved with construction of an eastbound lane between Hardeson Road/5th Ave NW and I-5, improved signal operations at the SR 526/527 intersection and new ramp meters from eastbound SR 526 to northbound I-5. Work includes roadway widening in…

As part of WSDOT’s fish passage program, we will build a 26-foot fish-passable structure under SR 527 just south of 164th Street Southeast in Mill Creek. The current 9-foot culvert causes water to flow too fast for fish to continue upstream. The new bridge span will open more than 8 miles of…

As part of the state's fish recovery efforts, WSDOT has made it a priority to reconnect waterways where our roads act as barriers. In western Washington, that means building hundreds of fish passable structures under state highways in the next decade to create habitat gain essential for…

Contractor crews working for WSDOT will repaint the southbound SR 529 Steamboat Slough Bridge between Marysville and Everett, which has deteriorated due to weathering. This project will replace the paint to preserve the existing structural integrity and extend the service life of the bridge.

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…

This section of SR 531 between 43rd Avenue Northeast and 59th Avenue Northeast in Arlington will be widened to add a second lane in each direction. In addition, roundabouts will be added at the 51st Avenue Northeast and 59th Avenue Northeast intersections to improve safety, travel times and reduce…

The State Route 536 Skagit River Bridge received its last coat of paint in 1990. After 36 years, contractor crews will add fresh paint to the bridge to preserve and extend its service life beginning in spring 2026. In addition to painting, this project includes all the preparation work before…

This project will pave two miles of northbound and southbound State Route 539 from SR 546 (milepost 12.55) to Bay Lyn Drive (milepost 10.40). Crews working for WSDOT will rehabilitate the existing roadway surface and update the roadway striping. Additionally, pedestrian curb ramps will be evaluated…

This project will replace the State Route 542 bridge over Glacier Creek in Whatcom County, in the Community of Glacier. The new bridge will connect to the existing Gallop Creek Bridge, and together, these new structures will reduce flood risk, restore salmon habitat, and improve safety for all…

This project will make improvements to the State Route 542 Bagley Creek Bridge (milepost 49) in Whatcom County. Erosion has exposed a footing of the bridge and caused a hole under the footing.

Contractor crews working on behalf of WSDOT will pour additional concrete, move existing…

This project improved the Kamm Ditch fish passage on SR 546/E. Badger Road, east of Northwood Road (milepost 4), in Whatcom County. Construction on this fish passage project began in July 2022.

This project will pave over two miles of eastbound and westbound State Route 546 from SR 539 (milepost 0.03) to Vinup Road (milepost 2.45), excluding previous fish passage areas at Depot Road (milepost 1.47) and Bender Road (milepost 2.01). Crews working for WSDOT will rehabilitate the existing…

Beginning June 18, WSDOT will build a compact roundabout at the intersection of State Route 546/East Badger Road and Benson Road. The new roundabout will help improve safety along the busy SR 546 corridor on the northern edge of Lynden.

This project replaced rapid flashing beacons with overhead pedestrian signals at 11 locations along State Route 7 in the Pierce County communities of Parkland and Spanaway. Some locations have improved pedestrian ramps, extensions to the median islands, turn restrictions, and additional pavement…

Safety improvements are coming to two intersections on State Route 507 and State Route 702 in south Pierce County. Construction crews will build a single-lane roundabout on SR 507 at 208th Street near Spanaway and SR 702 at Harts Lake Road South near McKenna. Roundabouts help slow traffic and…

To address increased congestion, WSDOT has widened SR 9 from two lanes to four from its southern starting point to Marsh Road, except for a 3-mile section in the middle—from 176th Street Southeast to SR 96—where there is only one northbound lane and two southbound lanes. This project will add a…

WSDOT improved the intersection of SR 9 and SR 204 in Lake Stevens by adding four roundabouts and widening SR 9 to two lanes in each direction immediately south of the intersection. These improvements help manage congestion and improve mobility, provide better access to area businesses and provide…

Snohomish County keeps growing and traffic grows with it. State Route 9 was once a rural, two-lane highway. Today, it serves as a key north-south alternative to I-5 for commuters and freight moving through Snohomish County. Peak travel times now bring regular congestion.

WSDOT…

Beginning in July 2026, the Washington State Department and contractor Interwest Construction Inc. (ICI) of Burlington will begin construction on a project that will remove barriers to fish migration at two locations along State Route 9 in Skagit County and replace them with new structures that…

Reconnecting waterways where our roads act as barriers is a priority for the state. In western Washington, that means building hundreds of fish passable structures under state highways to create habitat essential for meeting fish recovery goals. Beginning as early as 2027, WSDOT will install a new…

State Route 900/Martin Luther King Jr. Way South in the unincorporated Skyway-West Hill community is a busy roadway between Renton and Seattle serving drivers, freight, public transit, bicyclists and pedestrians. This project will construct bicycle and pedestrian facilities on SR 900 that allow…

This project will rehabilitate roughly 18 lane miles of State Route 904 from the I-90 interchange in Tyler to Mullinix Road in Cheney in Spokane County. The project includes removing existing pavement from the roadway surface and repaving with Hot Mix Asphalt (HMA).

As part of the state's fish recovery efforts, WSDOT has made it a priority to reconnect waterways where our roads act as barriers. In western Washington, that means building hundreds of fish passable structures under state highways in the next decade to create habitat gain essential for…

Beginning in July 2024, contractor crews working for WSDOT re-established fish habitat in the Pilchuck River along State Route 92, just south of Sleepy Hollow Road, near Granite Falls. This project replaced large woody debris constructed as fish habitat in 2016, much of which had washed away. This…

As part of the state's fish recovery efforts, WSDOT has made it a priority to reconnect waterways where our roads act as barriers. In western Washington, that means building hundreds of fish passable structures under state highways in the next decade to create habitat gain essential for…

On Feb. 18, 2026, Washington State Department of Transportation bridge inspectors identified cracks in the steel deck grates on the northbound State Route 99 First Avenue South bridge in Seattle, requiring two lanes to close. Crews completed temporary repairs in early March to restore the original…