I-90 - Snoqualmie Pass East - Keechelus Dam Vicinity to Stampede Pass Interchange (Phase 2)

Project news

Why is WSDOT improving safety and reliability on I-90?

Phase 2 is part of a 15-mile corridor improvement project to improve safety and reliability and reduce congestion along I-90 from Hyak to the Easton vicinity. 

On an average day, 31,000 vehicles travel over Snoqualmie Pass and traffic numbers double on weekends and holidays. Traffic volumes are expected to increase 2.1 percent every year, reaching an average of over 39,000 vehicles per day by 2040.

Construction on Phase 2 is underway and started summer 2015. This phase includes the next 2 miles from Keechelus Dam to the Stampede Pass Interchange and the first wildlife over crossing in the corridor near Price Creek.

The End Result

WSDOT will continue to increase capacity and improve safety by:

  • Adding a new lane in each direction
  • Replacing concrete pavement
  • Stabilizing rock slopes
  • Building wildlife crossings
  • Straightening the roadway 
  • Adding new chain-up area

Needs & benefits

  • Safety. WSDOT will improve the driving surface on I-90 by replacing the concrete pavement, straightening the roadway, and adding new chain-up areas.
  • Congestion Relief. WSDOT will increase capacity by 50 percent in each direction to accommodate projected traffic volumes for the next 20 years by adding a lane in each direction.
  • Environmental. WSDOT will minimize impacts to the environment and improve movement of wildlife.


  • Summer 2015 - construction begins
  • Fall 2019 - construction complete


Financial Data for PIN 509090O
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $105,303
Pre-Existing Funds (PEF) $0
CWA $0
Total $105,303

WSDOT is using $108 million of project savings from Phase 1 to design, purchase right of way and construct Phase 2. In 2015, the legislature passed a new revenue package called Connecting Washington, which provides $426 million to fund the remaining eight miles of the 15-mile corridor from the Stampede Pass Interchange to Easton.


Scott Golbek
Project Engineer
Phone: 509-577-1880

Meagan Lott
Phone: 509-577-1618

Thumbnail - I-90 - Phase 1 and 2 map

I-90 des vis thumbnail

Design Visualization of the I-90 Snoqualmie Pass East project.

Screenshot from Lifeline video

I-90 is a major transportation corridor in Washington state, find out why.

A design visualization of the wildlife overcrossing.

Take a look at all the progress crews are making on the project.