Voter approval (2008)
Milestone Target Feasibility study and public comment Preferred route alternative selected Environmental Impact Statement (EIS) completed Board selects route and final project to be built 2011 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.
Milestone Target Sound Transit and Bellevue City Council finalize tunnel design 2011 City of Bellevue cost-savings plan completed 2013 State Environmental Protection Agency (SEPA) Addendum to final EIS 2016 Second SEPA Addendum for I-90 HOV lane use between Seattle and Mercer Island 2017
Milestone Target Construction starts on the Operations and Maintenance Facility: East (OMF East) in Bellevue Elevated rail guideway is placed over I-405 in Bellevue
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 (2023)*
*Aug. 18, 2022 update: Work is ongoing to identify new opening timelines for four light rail projects currently in construction. While the East Link Extension was planned to open in mid-2023, construction challenges are currently projected to delay completion by at least a year. An upcoming programmatic review will also assess shared resources and project sequencing. Expect further updates in Q4 2022.