WSDOT and the Federal Highway Administration (FHWA) published the Finding of No Significant Impact (FONSI) and Errata (pdf 36.66 mb) for the I-405, Tukwila to I-90 Vicinity Express Toll Lanes Project on April 12, 2019.
WSDOT and the Federal Highway Administration (FHWA) signed the Environmental Assessment (pdf 13.45 mb) for the I-405, Tukwila to I-90 Vicinity Express Toll Lanes Project on July 3, 2018. A 30-day comment period ended on Aug. 9, 2018.
The State Environmental Protection Act (SEPA) Determination of Non-Significance for the I-405, Tukwila to I-90 Vicinity Express Toll Lanes Project was also published on July 9, 2018.
Summary
Documents for download
Discipline Reports
* Attachment K: Glossary and Attachment L: Acronyms and Abbreviations are included in the Environmental Assessment (pdf 13.45 mb).