Viaduct removal

After the new State Route 99 tunnel opens to drivers, the Alaskan Way Viaduct along Seattle's waterfront will be removed to make way for a new surface street built by the City of Seattle. This project will help transform Seattle’s waterfront while removing a vulnerable structure from our road network.

Current view of the viaduct

Project at a glance:

  • Shifts Alaskan Way to the west of the viaduct.
  • Removes the Alaskan Way Viaduct.
  • Closes and fills the Battery Street Tunnel.
  • Rebuilds Aurora Avenue North between Harrison Street and Denny Way, and reconnects Thomas and John cross-streets.
  • Begins shortly after the SR 99 tunnel opens to drivers.
  • More information coming this summer and fall.

On May 16, WSDOT announced Kiewit Infrastructure West Co. as the apparent-best-value contractor, which means Kiewit submitted the best combination of technical proposal and price for completing the work. We will have more information to share late summer/early fall about the contractor’s schedule and approach to the work.


+ Viaduct removal overview

+ Scope of work

+ Project schedule

+ Process of selecting a contractor

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