Resource library

Need help finding the information you’re looking for? You can search our resource library by topic to find the resources you need. This list includes materials that span the entire project timeline up to this point.

An Environmental Impact Statement provides Tribes, agencies, and the public with an understanding of a project’s potential impacts and benefits. This analysis describes how each alternative might affect the natural environment, built environment, and transportation system.

The Final EIS identifies ways to mitigate impacts. We analyze each alternative and design option, considering the effects on historic and cultural resources, residential properties, businesses, communities, the local economy, and other resources.

In September 2024, the Federal Transit Administration and Sound Transit published the WSLE Final EIS. The Final EIS includes updates based on continued design and comments received on the WSBLE Draft EIS. The WSLE Final EIS also includes responses to public, agency, and Tribal comments. Sound Transit will respond to comments on the Ballard Link Extension in a separate BLE environmental process.

On October 24, 2024, the Board selected the preferred alternative as the project to be built for WSLE, a step toward completing the environmental review phase and allowing the project to proceed into design. This decision includes the light rail route, profile, and station locations based on years of technical analysis and community feedback through our study of multiple route and station alternatives since 2017.

The FTA issued the ROD on April 29, 2025, under NEPA, which moves the project into the final design phase. As the West Seattle Link Extension Project moves forward, we will share updates and opportunities to stay engaged.

The Executive Summary provides an overview, summarizing elements of the larger Final EIS to help readers quickly become acquainted with the project.

You can view the entire Final EIS online.

In July 2022, the Sound Transit Board directed the project team to complete additional further studies. Staff held community workshops, open houses, stakeholder meetings and surveys between September 2022 and January 2023.

  1. WSBLE Draft EIS materials

  2. Comment period engagement materials WSBLE Draft EIS briefing booklets

  3. Environmental reports

Early scoping and scoping

Engagement materials

Alternatives development

  1. Community Advisory Group (CAG)

  2. Elected Leadership Group

  3. Stakeholder Advisory Group

Please visit the Sound Transit Board of Directors documents page for links to all WSLE Board presentations and motions.

Learn more about how Sound Transit works with Property Owners.

Please visit the WSLE documents page to view project engagement reports and other public outreach documents.