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SR 520 Bridge Replacement and HOV Program


Pontoon builders in Aberdeen, Wash., tow from WSDOT's casting basin into the Chehalis River one of the final three pontoons constructed for the new SR 520 floating bridge. Watch the newly completed pontoons' March 9-10 float-out in under one minute in this time-lapse video.

Key SR 520 links

SR 520 Projects - Click a project title for more information
SR 520 Projects - Click project titles for more information

Contact information:


Phone: 206-770-3500

Infoline: 1-888-520-NEWS (6397)

24-hour construction hotline: 206-708-4657

Twitter: @WSDOT_520

Mail: SR 520 Bridge Replacement and HOV Program
999 3rd Avenue, Suite 2200
Seattle, WA 98104

Sign up for email updates about the SR 520 program

Questions about tolling?

Call 1-866-936-8246 or visit Good to Go!

Medina to SR 202: Eastside Transit and HOV ProjectPontoon Construction Project