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Board adopts updated Sound Transit 3 System Plan
On May 28, the Sound Transit Board adopted an updated ST3 System Plan to guide the next phase of transit expansion projects across the region. This action established a sustainable path forward to address an estimated $34.5 billion gap in the agency’s financial plan over the next 20 years and deliver the voter-approved ST3 program.
The updated System Plan keeps projects moving with available funding and directs the agency to pursue cost savings, additional funding opportunities, and project delivery efficiencies to advance the ST3 program.
For more information, read our recent Platform article or dive deeper into Resolution R2026-11.
The Graham Street Station project is funded to move forward through planning, design, and construction.
In partnership with City of Seattle and King County, the updated System Plan fully funds the Graham Street Infill Station. As planning and design continue, Sound Transit will use $25M in secured federal grant funds for project construction, apply cost savings opportunities, and pursue additional grant opportunities. The City of Seattle will also work with Sound Transit to support cost reduction efforts.
 What's coming next for the project?
The next major milestone will be the completion of preliminary engineering and publication of environmental documentation, which is anticipated to be available to the public in early 2027. Following this, the project will complete the Planning phase and move into the Design phase.
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As the timeline continues to advance, we’ll share more information about future milestones through email updates and on our project website. Community input will continue to play an important role as we advance design and work toward delivering the Graham Street Station.
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