I-90/SR 18 to Deep Creek Interchange Improvements and Widening

Snoqualmie, Washington State

The scope of work for the Interstate-90 (I-90) / State Road-18 (SR-18) to Deep Creek Interchange Improvements and Widening project includes:

Design and construction of a four-lane diverging diamond interchange
Widening of SR-18 to four lanes from the interchange to Deep Creek
Design and construction of a four-lane bridge over Deep Creek and a two-lane bridge over Raging River

CLIENT
Washington State Department of Transportation (WSDOT)

AWARDED CONTRACT VALUE
US$126 million

START DATE
2022

The diverging diamond interchange will improve the flow of traffic by reducing the number of traffic signals and offering more free turns for drivers entering and exiting the interstate. Growth in Snoqualmie Valley has resulted in the current I-90/SR 18 interchange being one of the busiest in Washington State.

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