DiscoverSeattle NowIt took years to float a train over Lake Washington. Here's how it works
It took years to float a train over Lake Washington. Here's how it works

It took years to float a train over Lake Washington. Here's how it works

Update: 2026-03-30
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Opening the light rail across Lake Washington over the weekend was an historic moment.

Trains go across bridges regularly, but never before has there been a train over a floating bridge.

Engineers worked on the challenge for years. 

We’ll hear why it’s so complicated and how engineers pulled it off from University of Washington professor Travis Thonstad.

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It took years to float a train over Lake Washington. Here's how it works

It took years to float a train over Lake Washington. Here's how it works

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