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342 results

Project

SR 500/162nd Ave to 166th Ave – Safe Routes to School

Timeline: Spring 2022 - Spring 2024
  • Road
  • Completed
  • Clark County
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,…
Project

SR 501 - I-5 to Port of Vancouver - Intersection and Profile Improvements - Complete - Sept. 2023

Timeline: Spring 2019 - Fall 2023
  • Road
  • Completed
  • Clark County
Previously, oversized freight vehicles had to divert from this section of Mill Plain Boulevard (SR 501) onto city streets due to high points in the roadway and limited overhead clearances. Corridor modifications increased safety along the corridor for all modes of transportation. Improvements…
Project

SR 503 / NE Rock Creek Rd Intersection Improvements

Timeline: Winter 2021 - Fall 2024
  • Road
  • Pre-construction
  • Clark County
This project will improve safety at the intersection of SR 503 and Northeast Rock Creek Road by installing a compact roundabout. After reviewing traffic data over a five-year period that included severe injuries, a fatality, and many cases of property damage, this location was identified for…
Project

SR 503 Prairie High School Pedestrian Signal

Timeline: November 2023 - February 2025
  • Road
  • Pre-construction
  • Clark County
This project will construct a HAWK (High Intensity Activated Crosswalk) pedestrian signal, with a median refuge island creating safer access for pedestrians crossing State Route 503 to and from Prairie High School and the nearby transit stop.

What is a HAWK signal?

The…
Project

SR 503 Spur – Culvert Failure

Timeline: Dec. 2023 - Jan. 2024
  • Road
  • Construction
  • Cowlitz County
  • Skamania County
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…
Project

SR 504 South Coldwater Slide – Spirit Lake Outlet Bridge Washout

Timeline: May 2023 - 2026
  • Road
  • Pre-construction
  • Cowlitz County
  • Skamania County
Shortly after 9 p.m. Sunday, May 14, 2023, more than 300,000 cubic yards of debris from an adjacent hillside fell approximately 2,000 feet above SR 504 and covered the roadway with rock, mud, ice and water, causing catastrophic damage to the 85-foot Spirit Lake Outlet Bridge at milepost 49.
Project

SR 506/1.5 Miles N of Frontage Rd to I-5 – Emergency Bridge Repair

Timeline: Summer 2022 - Mid-to-late 2023
  • Road
  • Construction
  • Lewis County
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…
Project

SR 507/N of Connor Rd - Culvert Replacement - Complete Fall 2023

Timeline: Fall 2023
  • Road
  • Completed
  • Thurston County
  • Lewis County
Crews removed and replaced a failing culvert under the highway.
Project

SR 509 Completion Project

Timeline: 2015-2028
  • Road
  • Construction
  • King County
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…
Project

SR 509/Miller Creek fish passage

Timeline: 2020 – 2027
  • Road
  • Pre-construction
  • King County
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…
Project

SR 510 - Yelm Loop - New Alignment Phase 2

Timeline: Spring 2025 - Fall 2027
  • Road
  • Pre-construction
  • Thurston County
Crews will build the three remaining miles of SR 510 between Cullens Road and 170th Street Southeast in Yelm. The new connection, like the previously built Phase 1, is proposed to be a two-lane highway with bicycle and pedestrian facilities.
Project

SR 513 - Montlake Bridge - Mechanical Rehab, Deck Replacement & Joint Repair - Complete May 2022

Timeline: Summer 2021 - Spring 2022
  • Road
  • Completed
  • King County
In 2021, contractor crews working for WSDOT replaced the more than 20-year-old worn grid deck on the Montlake Bridge. They also made expansion joint and mechanical repairs so the movable span can continue to operate reliably and meet the growing multimodal traffic demands of northeast Seattle. In…
Project

SR 516/Barnes Creek fish passage

Timeline: 2021-2024
  • Road
  • Completed
  • King County
Prior to construction, which ended in October 2023, a failing clay culvert just 2 feet in diameter carried Barnes Creek under SR 516 near Des Moines. This narrow culvert was a barrier for fish trying to swim upstream. This project replaced that small clay culvert with a new cement box culvert 20…
Project

SR 518/24th Avenue S Bridge - Girder Replacement - Complete November 2023

Timeline: Summer to Fall 2023
  • Road
  • Completed
  • King County
During summer 2023, our contractor crews replaced the damaged girder on the 24th Avenue South bridge over SR 518 near the Sea-Tac International Airport. Crews also made bridge drain and drainpipe improvements in the area.
Project

SR 520 - Floating Bridge and Approaches Bridge Decks and Soffit Sealer

Timeline: Summer 2024 - Fall 2024
  • Road
  • Pre-construction
  • King County
Crews working for WSDOT will apply spray sealant to the bridge deck and soffits near expansion joints in both directions of the State Route 520 Evergreen Point floating bridge. The sealant will protect the bridge from corrosion, prolong its service life and help keep the bridge in a state of good…
Project

SR 520 148th Ave NE interchange - Overlake Access Ramp - Complete December 2023

Timeline: Summer 2021-Fall 2023
  • Road
  • Completed
  • King County
With this Connecting Washington project, we made multiple improvements to the State Route 520/148th Avenue Northeast interchange within the cities of Bellevue and Redmond.

Our contractor, Granite Construction, built a direct-access off-ramp from eastbound SR 520 to the Overlake…
Major Project

SR 520 Bridge Replacement and HOV Program

Timeline: 2011 - 2031
The SR 520 Bridge Replacement and HOV Program enhances travel safety and mobility with modern, structurally stronger bridges, as well as substantial transit and roadway improvements along this urban corridor. Built in stages, the improvements extend from I-405 in Bellevue to I-5 in Seattle.
Project

SR 520 Eastside Transit and HOV Project - Complete Summer 2015

Timeline: Construction began 2011; completed in 2015
  • Road
  • Completed
  • King County
This project added bus/carpool lanes in both directions between 108th Avenue Northeast in Bellevue and Lake Washington’s eastern shore. The project also built three landscaped, community-connecting highway lids over the highway, two transit stations in the highway median and the first leg of a…
Project

SR 520 Floating Bridge and Landings Project - Complete Summer 2017

Timeline: Bridge construction began in spring 2012 and was completed in summer 2017.
  • Road
  • Completed
  • King County
We replaced the world's longest floating bridge – a four-lane, 1960s-era structure – with a safer, six-lane bridge designed to withstand stronger windstorms and waves. Opened in April 2016, the new bridge also added shoulders for disabled vehicles and a separated, 14-foot-wide path for…
Project

SR 520 I-5 Express Lanes Connection Project

Timeline: August 2021 - 2024
  • Road
  • Construction
  • King County
The SR 520/I-5 Express Lanes Connection Project will create a dedicated reversible transit and carpool connection between SR 520 and the I-5 Express Lanes, along with a reversible transit/carpool ramp at the I-5/Mercer Street interchange.
Project

SR 520 Montlake Project

Timeline: Summer 2019 - 2024
  • Road
  • Construction
  • King County
The Montlake Project will improve transportation for both motorized and nonmotorized travel along the corridor with a new SR 520 eastbound bridge over Union Bay. This project also builds a new, three-acre lid covering the highway in Montlake that will include regional transit stops and open green…
Project

SR 520 Pontoon Construction Project - Complete Spring 2015

Timeline: Construction of the casting basin and pontoons began in Aberdeen in 2011. Pontoon construction ended in spring 2015.
  • Road
  • Completed
  • King County
The SR 520 floating bridge is supported and stabilized by 77 concrete pontoons . The Pontoon Construction Project built a casting basin and 33 of the bridge’s pontoons in Aberdeen, Washington. We built 44 of the bridge’s smaller pontoons in Tacoma, Washington, as part of the Floating Bridge and…
Project

SR 520 Portage Bay and Roanoke Lid Project

Timeline: Estimated 2024-2031
  • Road
  • Pre-construction
  • King County
The Portage Bay Bridge and Roanoke Lid Project will replace the aging Portage Bay Bridge with a seismically resilient structure that includes improved bus/carpool travel and an extension of the SR 520 Trail. This project also builds a landscaped lid between Seattle’s Roanoke Park and North Capitol…
Project

SR 520 West Approach Bridge North Project - Complete December 2017

Timeline: Construction began in September 2014 and finished in December 2017.
  • Road
  • Completed
  • King County
The West Approach Bridge North Project extended SR 520’s three westbound lanes, including a transit/HOV lane, from the new floating bridge to Seattle’s Montlake neighborhood. It also expanded the new SR 520 Trail across Lake Washington to Seattle.
Project

SR 520/124th Avenue NE Interchange Project

Timeline: This project is currently in the preliminary engineering stage.
  • Road
  • Pre-construction
  • King County
We are examining solutions to reduce congestion at the I-405/SR 520 interchange. Currently, over half the trips from westbound SR 520 are traveling to the Bellevue vicinity. A new project will allow westbound drivers the option to access the downtown Bellevue vicinity by exiting SR 520 onto 124th…
Project

SR 522 - I-5 to 61st Ave NE - Paving & ADA Compliance

Timeline: Spring 2020 to Fall 2022
  • Road
  • Construction
  • King County
WSDOT contractor crews will repave sections of SR 522, commonly known as Lake City Way or Northeast Bothell Way, which were last paved in 2002.
Project

SR 522 - Paradise Lake Rd to Snohomish River Br - Interchange & Widening

Timeline: 2017 - 2025
  • Road
  • Pre-construction
  • Snohomish County
SR 522 in Snohomish County is an increasingly important north-south route connecting communities between Woodinville and Monroe. One section between Paradise Lake Road in Maltby and the Snohomish River remains one-lane in each direction. We plan to widen the highway to two lanes in each direction,…
Project

SR 522/Thornton Creek Fish Passage

Timeline: 2023-2028
  • Road
  • Pre-construction
  • King County
Reconnecting waterways where roads act as barriers is a priority for the state. In western Washington, this means building hundreds of fish-passable structures under state highways to create habitat that is essential for meeting fish recovery goals.

A culvert below State Route 522…
Project

SR 524/Martha Creek to Swamp Creek Fish Passage

Timeline: Fall 2025 - Spring 2028
  • Road
  • Pre-construction
  • Snohomish County
This project will remove a barrier to fish passage along Martha Creek on State Route 524 near Lynnwood. Contractor crews working for WSDOT will remove the existing culvert and replace it with a fish-passable structure. This new structure has the potential to open more than 1.5 miles of habitat for…
Project

SR 524/Scriber Creek Fish Passage

Timeline: Spring 2023 - Summer 2028
  • Road
  • Pre-construction
  • Snohomish County
Reconnecting waterways where roads act as barriers is a priority for the state. In western Washington, this means building hundreds of fish passage structures under state highways to create habitat that is essential for meeting fish recovery goals.

A culvert under State Route 524…

166,800 electric vehicle

registrations in Washington in 2023, up from 114,600 in 2022.

87 wetland compensation sites

actively monitored on 918 acres in 2023.

25,000 safe animal crossings

in the Snoqualmie Pass East Project area since 2014.