Contractor selected for I-90/S.R. 18 interchange project in Washington State

The Washington State Department of Transportation (WSDOT) recently announced the selection of a design-build contractor […]

The Washington State Department of Transportation (WSDOT) recently announced the selection of a design-build contractor for the I-90/S.R. 18 interchange improvement project near North Bend.

Aecon Pacific Northwest Inc. submitted the best value proposal to complete the design and build the project following a competitive evaluation process, WSDOT said in a news release.

“Aecon has built large highway, civil and private projects across the U.S. and Canada,” WSDOT Project Engineer Mark Allison said in a statement. “This is a significant project and one the community has anticipated for a long time. We look forward to working with Aecon to build an interchange that will serve people for many years to come.”

The I-90/S.R. 18 project will feature a diverging diamond interchange, which improves the flow of traffic by reducing the number of traffic signals and offering more free turns for drivers entering and exiting the interstate.

The I-90/S.R. 18 project also includes:

  • Widening approximately 2 miles of SR 18 from the interchange to Deep Creek, creating two lanes in each direction
  • Construction of a new four-lane bridge over Deep Creek and a new two-lane southbound bridge over Raging River
  • Adding a dedicated right turn lane from southbound Snoqualmie Parkway to westbound I-90

The $190 million project is funded through pre-existing gas tax funds and the 2015 Connecting Washington transportation fund, which is a $16 billion investment that enhances the statewide transportation system and maintains critical infrastructure.

Construction is expected to begin later this year with completion in 2025.

 


The original article can be found at: Road & Bridge