2017 SEPA Addendum to the East Link Final EIS

Sound Transit and Washington State Department of Transportation (WSDOT) have prepared a State Environmental Policy Act (SEPA) Addendum for the East Link Extension, which is a light rail project that connects downtown Seattle to Mercer Island, Bellevue, and Redmond via Interstate 90.

The Addendum updates the Final Environmental Impact Statement (EIS) issued in July 2011 and subsequent 2013 and 2016 addenda by providing additional analysis and information about the project. It describes changes in operation of I-90 high occupancy vehicle lanes and project refinements associated with transit integration on Mercer Island, evaluates the potential impacts of these changes, and identifies changes to mitigation measures.

Executive Summary and Sections 1-2 (.pdf, 7mb)
Section 3 (.pdf, 4 mb)
Section 4, part 1 (.pdf, 10 mb)
Section 4, part 2 and Sections 5-9 (.pdf, 3.4 mb)
Appendix A Part 1 (.pdf, 9.7 mb)
Appendix A Part 2 (.pdf, 6.4 mb)
Appendices B-F (.pdf, 2 mb)