2. Timeline and milestones

  • Voter approval (2008)

  • Milestone Target
    Conceptual engineering
    Environmental analysis
    Board approves amended project: July 2018
  • Milestone Target
    Advance design  
    Acquire property  
    Hire design-build team (Under a design-build contract, Sound Transit selects a single contractor to oversee both design and construction, creating opportunities to streamline project delivery and help guarantee budget.)  
    Obtain permits  
  • Milestone Target
    Complete design  
    Groundbreaking  
    Construction updates  
  • Base open (2023)