Sounder Maintenance Base

Timeline and milestones

  • Voter approval (2008)

  • Milestone Target
    Conceptual engineering
    Environmental analysis
    Board approves amended project: July 2018
  • Design and construction (2018-2034)
    We are here

  • Base open (2034)

On Aug. 5, 2021, the Sound Transit Board adopted a realigned capital plan to address steeply rising construction and real estate costs affecting many voter-approved regional transit expansion projects. Based on current revenue projections and cost estimates, the Board’s adopted plan identifies 2034 as the Sounder South Maintenance Base opening date.