SR 520 Bridge: First Pontoon Float-in
Crews floated in the first longitudinal pontoon for the new SR 520 bridge through the Hiram M. Chittenden Locks on August 11, 2012. Arriving just after 6 p.m., the entire operation took around 45 minutes and was observed by hundreds of spectators enjoying the sunny Saturday in Seattle, Washington. This pontoon is the first of 77 that will make their way from their casting basins to Lake Washington during the next two years.

After nearly 15 years of engineering and analysis, we are launching construction on a new SR 520 floating bridge on Lake Washington.

The new SR 520 floating bridge will better withstand windstorms, includes dedicated lanes for buses and carpools, and shoulders for moving collisions safely out of traffic.

More details about this project are online at:
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