Project phases - East Link Extension

East Link Extension timeline graphic showing project in construction phase.

Planning and environmental review: 2006-2011

From 2006-2011, Sound Transit evaluated 24 route alternatives. Sound Transit received more than 1,800 comments during the five year process and held 28 open houses, hearings and workshops to gather community input.

Environmental review and preliminary engineering for East Link Extension was completed in 2011. Sound Transit issued a Final Environmental Impact Statement (FEIS) and the Sound Transit Board selected the project to be built in July 2011. The Federally issued Record Of Decisions (ROD) finalized the alignment that the Sound Transit Board selected through this work, completing the required process under the National Environmental Policy Act.

East Link Draft EIS documents

East Link Supplemental Draft EIS documents

East Link Final EIS documents

Federal Transit Administration website

Federal Highway Administration website

2017 SEPA Addendum to Final Environmental Impact Statement

Sound Transit has prepared the following SEPA Addendum to the Sound Transit East Link Light Rail Project Final Environmental Impact Statement (July 2011). The purpose of this SEPA Addendum is to describe changes in the operation of I-90 high-occupancy vehicle (HOV) lanes between Seattle and Mercer Island and project refinements associated with transit integration on Mercer Island, to evaluate the potential impacts of these changes, and to identify changes in mitigation measures.

The Addendum and supporting materials can be reviewed at local libraries and at Sound Transit 401 S. Jackson St., Seattle WA 98104. Please contact Elma Borbe (206) 398-5445 or via email elma.borbe@soundtransit.org to request copy of the Addendum. Hard copies of the Addendum, without the appendices, are free. CDs, which include both the Addendum and all appendices, are also free. Hard copies of the appendices are $15.

2017 SEPA Addendum to Final Environmental Impact Statement

2016 SEPA Addendum to Final Environmental Impact Statement

Sound Transit has prepared the SEPA Addendum to the Sound Transit East Link Light Rail Project Final Environmental Impact Statement (July 2011). The Addendum addresses potential refinements to the East Link Extension and provides new project related environmental information.

Please contact Elma Borbe at (206) 398-5445 or via email elma.borbe@soundtransit.org if you would like a CD copy of the addendum, which is free, or a paper copy for $15.00. It can also be reviewed at local libraries and at Sound Transit office 401 S. Jackson St., Seattle, WA 98104.

SEPA Addendum to the East Link Light Rail Project Final Environmental Impact Statement

2016 SEPA Addendum to the East Link Light Rail Project Final Environmental Impact Statement

Final design

During final design, Sound Transit will complete the design of the trackway, stations and art installations as well as determining construction methods, including sequencing and mitigation.

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City of Bellevue cost savings process: 2012-2013

In November 2011, the Sound Transit Board and the Bellevue City Council established a framework to develop East Link and to share the additional cost of a downtown tunnel. Since then, Sound Transit and the City have worked together in a collaborative design process that includes the study of potential cost savings ideas while still delivering a high quality project. The decision to incorporate any one or more of these cost savings ideas into East Link Extension will not occur until approximately the spring of 2013, when additional review is complete.

PDF iconCost Savings Report(.PDF, June 2012)
PDF iconPublic Involvement Summary #1 (.PDF, June 2012)
PDF iconCost Savings Work Plan Findings (.PDF, September 2012)
PDF iconPublic Involvement Summary #2 (.PDF, October 2012)
PDF iconPublic Involvement Summary #3 (.PDF, April 2013)

For more information and additional documents, visit the East Link project archive

Construction is getting started across the project. While the entire 14 miles will open in 2023, construction will start in different places at different times to maximize efficiency and minimize impacts on surrounding communities.

East Link construction alerts

Targeted: 2022