• Major Project

I-90 - Snoqualmie Pass East Project

Map of Snoqualmie Pass East

Major Project overview

The I-90 Snoqualmie Pass East Project improves 15 miles from Hyak to Easton. Phases 1 and 2 from Hyak to the Stampede Pass interchange are complete. Phase 3 is underway.

Timeline overview

2009 - 2029

Major project status



To be determined

Major project alerts

Summer Derrey
WSDOT Communications

Interstate 90 is a critical transportation corridor connecting the large population and business centers of the Puget Sound with the agricultural industries and recreational activities of eastern Washington.

The I-90 traveler may experience congestion, delays due to avalanche closures, rough pavement conditions, rock slide activity and potential wildlife collisions on the highway. The uninterrupted movement of people, freight and business over Snoqualmie Pass is essential to our quality of life and the economic vitality of Washington state. WSDOT is expanding a 15-mile stretch of I-90 from Hyak to Easton to meet both the current and future needs of this transportation corridor.

When this project is complete, travelers will experience a safer, more efficient six-lane freeway, minimized closures as a result of avalanches and rock slides, and a smoother ride due to new pavement designed to last 50 years. Wildlife habitat on either side of I-90 will be reconnected with the installation of new bridges and culverts, protecting both wildlife and the traveling public.