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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On April 28, 2013, the second cycle of SR 520 pontoons were floated out of the Aberdeen casting basin. The basin gate is made up of three 50-ton steel sections and gets removed by a massive crane. As the water level rises inside the basin, the first of three sections is lowered onto land after being lifted out of position.
Photo by (WSDOT Flickr)
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