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WSDOT moves six pontoons for 520 bridge

WSDOT crews towed six pontoons from casting basins into the Grays Harbor Sunday night.

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A 360-foot-long and 11,000 ton longitudinal pontoon is towed through the launch channel of the SR 520 pontoon construction site. The float-out operations coincided with the high tide Sunday night. Crews worked through blustery winds and heavy rain to float-out the six pontoons from the casting basin.
Photo by (WSDOT Flickr)
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