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This project will remove barriers to fish migration under State Route 3, SR 16 and SR 166 in Kitsap County. New bridges or larger culverts will replace five outdated culverts. Work includes construction of a roundabout at the SR 3, SR 16 Spur and West Sam Christopherson Avenue intersection.

In summer 2022, our contractor began fish barrier corrections to replace two outdated culverts at Little Minter Creek under State Route 302. Since 2019, crews have completed paving and ADA ramp work for eight miles of SR 302 in addition to correcting three identified barriers to salmon and resident…

This project helps improve safety at the intersection of State Route 302 and 118th Avenue Northwest in Wauna. Construction crews will build a single-lane roundabout to replace stop signs.

This project addressed barriers to fish in Victor Creek under SR 302 near the Mason/Pierce County line.

Washington State Department of Fish and Wildlife identified this site as a barrier to salmon migration and other resident fish species.

There's a lot of work that needs to be done to keep bridges in good working order. This includes regular cleaning and inspection of the Agate Pass Bridge. The bridge, on SR 305, connects Bainbridge Island to the Kitsap Peninsula. We clean the bridge every February to keep dirt and grime from…

This project removed two existing 270-foot-long, 36-inch-diameter concrete pipe culverts on State Route 305 outside of Poulsbo at the Sam Snyder Creek crossing and replaced them with a single 239-foot-long steel girder bridge. General work activities included: clearing and grubbing, earthwork…

WSDOT built two modern roundabouts on Bainbridge Island at the intersections of SR 305 and Northeast West Port Madison Road/Northeast Seabold Road and SR 305 and Northeast Adas Will Lane. The improvements included curbing and a center median at Agatewood Road Northeast which permanently makes that…

This bundle removes and replaces six outdated culverts under Bond Road/State Route 307 and State Route 308, and is a part of a broader effort to remove 29 barriers to fish across Kitsap County. Washington State Department of Fish and Wildlife has identified these sites as barriers to salmon…

In March 2026, construction was completed to replace lighting along both directions of the State Route 4 Peter Crawford Bridge, improving safety for people who walk, bike, or roll across it after dark. In addition to installing the new lights, crews upgraded the electrical cabinets and wiring that…

On Tuesday, Feb. 23, 2021, due to roadway settlement caused by heavy rainfall, both directions of State Route 401 (also known as the Lewis and Clark Trail Highway) between the Astoria-Megler Bridge and Naselle were closed.

In spring 2021, emergency contractor crews were able to…

The SR 410 White River Bridge between Buckley and Enumclaw reopened Friday, Oct. 17, after contractor crews completed repairs. On Aug. 18, 2025, an over-height vehicle struck several of the support beams on the bridge, causing serious damage that required us to close the bridge. After a complete…

In December 2025, a flooding event from Boise Creek just west of Enumclaw damaged State Route 410 at milepost 26.6. The road was closed Dec. 10, 2025 after the eastbound lanes were washed away. On Dec. 16, the road was reopened in a single-lane alternating traffic configuration using the westbound…

Starting in early 2023, contractor crews will kick off the much-anticipated project to enhance the SR 411 Cowlitz River Bridge, also known as the A Street Bridge or the PH-10 Bridge. This vital bridge connects the City of Castle Rock to the west side of the Cowlitz River.

The primary…

In fall 2025 contractors working for WSDOT will begin work to remove and replace a failing culvert underneath SR 411, better known as West Side Highway, just south of Castle Rock, in Cowlitz County.

On Friday, Oct. 24, 2025, construction to replace the failing culvert was completed…

In summer 2023 contactor crews working for the Washington State Department of Transportation resurfaced a nearly 2.5 mile stretch of SR 432 between milepost 7.19 near Industrial Way and milepost 7.19 near the Cowlitz River, in Longview, WA. Crews also resurfaced several off- and on-ramps along…

This project restored the north/south connection across State Route 500 at the Northeast Stapleton Road/Northeast 54th Avenue intersection in Vancouver by constructing a new pedestrian overcrossing that meets the Americans with Disabilities Act. Restoring access across the highway for people who…

Growth and development in eastern Clark County is contributing to an increase in traffic volumes and traffic related crashes along SR 500 - between the Northeast Robinson Road and Northeast 3rd Street intersections. To keep people moving safely, reduce travel times and crashes and to ensure this…

Washington State Department of Transportation’s contractor, Thompson Bros. Excavating, successfully constructed a new shared-use path on the south side of State Route 500, also known as Northeast Fourth Plain Boulevard, between Northeast 162nd and Northeast 166th avenues, allowing those who bike,…

This project improved safety at the intersection of State Route 503 and Northeast Rock Creek Road by installing a compact roundabout. After reviewing five-years of traffic data that included severe injuries, a fatality, and many cases of property damage, this location was identified for improvement…

This project constructed a pedestrian hybrid signal, creating safer access for pedestrians crossing State Route 503 to and from Prairie High School and the nearby transit stop.

On Saturday, Dec. 23, following the installation of a new 48-inch culvert, stabilizing, and back filling the failure area with rock, and reconstructing the roadway, NW Construction General Contracting, Inc., the emergency contractor has successfully restored two lanes of travel, and lifted the…

WSDOT is planning to create fish passages at two locations on State Route 503 Spur. The first location is at milepost 35.70, where a small stream flows into Dog Creek, and the second location is at milepost 35.85, where Dog Creek itself is crossed. These locations are in Cowlitz County, which is…

Shortly after 9 p.m. on Mother’s Day, May 14, 2023, more than 300,000 cubic yards of debris slid about 2,000 feet down a hillside above SR 504 near milepost 49. The slide buried the highway in rock, mud, ice and water and destroyed the 85-foot Spirit Lake Outlet Bridge.

Starting…

On Tuesday, July 6, 2021, an over height load was traveling southbound on I-5 when it struck and damaged the SR 506/Toledo-Vader Road overpass that spans over the interstate. Following the bridge strike, WSDOT bridge inspectors determined that the damage was extensive and they closed the overpass…

State Route 507 (SR 507) between the Skookumchuck River Bridge and the Thurston County line within Centralia and unincorporated Lewis County is in need of pavement preservation work to protect the public’s investment in the highway. This work is necessary to keep the roadway in good condition and…

In July 2026, contractor crews will return to finish work to protect the SR 508 embankment from erosion caused by the Tilton River, between mileposts 28.8 and 28.92 in Lewis County. Contractors will install two engineered log jams upstream to help reduce erosion and flooding, lower the risk of the…

The SR 509 Completion Project in King County is part of the Puget Sound Gateway Program, which also includes the SR 167 Completion Project in Pierce County. Together, these projects complete two of the Puget Sound region’s most critical freight corridors and improve access to I-5, the ports of…

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.

A culvert below State Route 509 west…

WSDOT replaced a culvert that failed beneath SR 510 near Lacey.

Crews will build the three remaining miles of SR 510 between Cullens Road and 170th Street Southeast in Yelm. The roadway will have two lanes. The project will also include a new shared-use path for people who walk, bike or roll.