• Major Project

Puget Sound Gateway Program

This map shows the portions of SR 167 and SR 509 that will be completed under the Puget Sound Gateway Program

Major Project overview

The Puget Sound Gateway Program combines the SR 509 Completion Project in King County and the SR 167 Completion Project in Pierce County to complete critical missing links in Washington state's highway and freight network. These projects build important new connections to the state's ports, will improve the movement of freight and reduce congestion on local roads and highways. Both projects have multimodal benefits and together create 6.5 miles of new bike/pedestrian paths and 3.5 miles of new sidewalks.

Timeline overview

2015-2028

Major project status

Construction

Funding

Estimated $2 billion funds the Gateway Program, which includes the SR 509 Completion Project and SR 167 Completion Project

Major project alerts

Contact
For construction inquires:
Chris Hoffman
For media inquiries:
Laura Newborn

For current SR 509 traffic alerts in south King County, please visit the SR 509 Completion Project
For current SR 167 traffic alerts in Pierce County, please visit the SR 167 Completion Project.

Three stages of construction

Both the SR 509 Completion Project in King County and SR 167 Completion Project in King County will be completed in three distinct stages of construction with work lasting through 2028.

SR 509 Completion Project  

First stage of construction (Stage 1a) - In progress

WSDOT partnered with Sound Transit to build a new SR 99 bridge over SR 509 near South 208th Street in SeaTac. The work is part of Sound Transit's Federal Way Link Extension (FWLE). The project includes new walls to reduce noise from both the new roadway and light rail. The partnership reduces construction disruptions by building both projects at the same time. This stage of construction is expected to wrap up in late 2022.

Second stage of construction (Stage 1b): SR 509/I-5 to 24th Avenue South – New Expressway Project - In progress 

This stage builds the first of 3 miles of SR 509 between I-5 and 24th Avenue South in SeaTac and adds a new interchange at 24th Avenue South. The project also builds new SR 509 ramps to and from I-5, improves the I-5/SR 516 interchange, and creates a new South 216th Street I-5 overpass with multi-modal access. Work should last through 2024. 

Third stage of construction (Stage 2): SR 509/24th Avenue South to South 188th Street – New Expressway Project - 2024-2028

This final stage builds the remaining 2 miles between SR 509's current end point and 24th Avenue South, linking the entire SR 509 to I-5. The work also adds a southbound auxiliary lane on I-5 between SR 516 and South 272nd Street. 

SR 167 Completion Project 

First stage of construction (Stage 1a): SR 167/70th Avenue Bridge Project - Complete 

This first stage of work started in 2020 and ended in 2021. In June 2021, WSDOT opened a four-lane bridge over I-5 in Fife that doubled the capacity of the 70th Avenue East Bridge it replaced. The new bridge, named the Wapato Way East Bridge, includes a 12-foot-wide protected pedestrian and bicycle path across I-5. WSDOT also built a new SR 99 multi-lane roundabout to allow traffic to flow between the bridge and SR 99. Other improvements include a new connection between the bridge and the Interurban Trail, and a new trail parking lot. This project set the stage for the rest of SR 167 construction. Learn how in this video.

This is an aerial view of the new Wapato Way East Bridge over I-5 in Fife and the connecting SR 99 roundabout.
The new Wapato Way East Bridge and connecting SR 99 roundabout in Fife

Second stage of construction (Stage 1b): SR 167/I-5 to SR 509 New Expressway Project - Starts in summer 2022 

This stage of construction builds a new 2-mile highway between I-5 and SR 509 in Pierce County, providing a direct link to the Port of Tacoma. A diverging diamond interchange will be built over I-5 to connect I-5 to the future SR 167 extension. There is also a unique environmental improvement program (Riparian Restoration Program) which will restore about 150 acres of wetlands and streams near SR 167 and I-5.

Third stage of construction (Stage 2): The SR 167/I-5 to SR 161 - New Expressway Project - 2025-2028 

This final stage of construction will build the remaining 4 miles of SR 167 between Puyallup and I-5. The project is currently in the design phase.

To learn more about this phased construction approach, see our Construction and Implementation Plan (PDF 1MB).