East Link Extension
Connecting the Eastside with reliable light rail

Timeline and milestones

  • Voter approval (2008)

  • MilestoneTarget
    Feasibility study and public comment


    Preferred route alternative selected


    Environmental Impact Statement (EIS) completed


    Board selects route and final project to be built2011 
    Record of decision


  • Sound Transit completes the design of the trackway, stations and art installations as well as determining construction methods, including sequencing and mitigation.

    Sound Transit and Bellevue City Council finalize tunnel design2011 
    City of Bellevue cost-savings plan completed2013
    State Environmental Protection Agency (SEPA) Addendum to final EIS2016
    Second SEPA Addendum for I-90 HOV lane use between Seattle and Mercer Island2017
  • MilestoneTarget
    Construction starts on the Operations and Maintenance Facility: East (OMF East) in Bellevue


    Elevated rail guideway is placed over I-405 in Bellevue2018
    Excavation of the downtown Bellevue tunnel is completed


    The Rainier Freeway station and D2 bus roadway from I-90 into downtown Seattle close in the fall for construction of Judkins Park Station


    Complete "post-tensioning" the I-90 floating bridge to prepare it for light rail and increase its lifespan


    Undercrossing on 112th Avenue Southeast in Bellevue gets started


    Work proceeds on station construction and guideway placement along the route 
    Safety testing and pre-operations checks complete 


  • Start of service (2024/2025)*

* Sound Transit began offering 2 Line service between South Bellevue and Redmond Technology stations in April 2024.
The 2 Line, which is not affected by quality issues related to construction, opened before the I-90 segment. The remainder of East Link, that crosses I-90 and includes Judkins Park and Mercer Island Stations, is expected to open in 2025.