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 section of walkway swings from a crane over the SR 520 pontoon construction site after it's removed from top of the casting basin gate. After setting it on land, crew will remove the basin gate and tow six massive concrete pontoons from the basin.
Photo by (WSDOT Flickr)
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