SR 525 Mukilteo Bridge Over Railroad – Bridge Replacement

The existing SR 525 bridge over the BNSF railroad tracks in the city of Mukilteo is functionally obsolete and does not meet current design standards or the transportation needs of the traveling public and community.  The existing bridge structure needs to be replaced to meet current design standards including the addition of active transportation facilities to meet WSDOT’s complete streets requirements and being raised to meet BNSF overhead clearance requirements. 

Community engagement 

Listening sessions 

Listening Sessions are being planned for fall 2024 to hear about transportation challenges and needs and transportation preferences. These sessions will include community-based organizations and other interested parties. 

Online Open House and Survey 

Community feedback will be sought during an online open house and survey planned for late 2024/early 2025. 

Working groups 

Technical Working Group (TWG) 

The TWG consists of public works, engineering, and planning staff from local, regional, state and tribal entities. The TWG serves in an advisory role to WSDOT providing technical feedback at multiple steps in the pre-design process.  

Technical Working Group Meeting 1
Monday, October 7, 2024
Presentation (PDF 8.2MB)
Summary (PDF 171KB)

Executive Working Group (EWG) 

The EWG consists of elected officials, chairs and executives from local, regional, state, business and tribal entities. The EWG serves in an advisory role to WSDOT providing policy feedback at multiple steps in the pre-design process. 

Complete streets  

The Complete Streets legislation was passed in 2022, in Washington Senate Bill 5974. Using the WSDOT’s Complete Streets approach, 

this project will go through a Complete Streets Pre-design phase to determine the bridge cross-section and corridor between milepost 8.30 to 8.47.The cross-section includes lanes for cars, buses, and trucks and facilities for bicyclists and pedestrians, all in one plan. The pre-design phase of the project will include significant community engagement to understand the needs of tribes, overburdened communities, multimodal users, ferry passengers, residents, and other interested parties in the area. 

The intent of the SR 525/Mukilteo Bridge Over Railroad - Complete Streets Pre-Design phase is to create a corridor that accommodates all users (pedestrians, bicyclists, transit users, and motor vehicle drivers) as well as provide improved connections to key destinations including the Washington State Ferries (WSF) Mukilteo Ferry Terminal, Sound Transit Mukilteo Sounder North station, parks, businesses, and neighborhood services. The public and interested parties will have opportunities to give input on the design of the new SR 525 bridge and SR 525 within the project limits. 

Healthy Environment for All (HEAL) Act  

This project is also subject to Washington's environmental justice law, known as the Healthy Environment for All (HEAL) Act. Environmental justice in Washington State, as provided in the HEAL Act, addresses disproportionate environmental and health impacts in all laws, rules, and policies by prioritizing vulnerable populations and overburdened communities, the equitable distribution of resources and benefits, and eliminating harm (RCW 70A.02.010)