Fourth cycle of State Route 520 pontoons leaving Aberdeen casting basin April 15

Six more SR 520 pontoons wait for high tide in Tacoma
The fourth cycle of pontoons headed for the State Route 520 bridge will be floating out of the Aberdeen casting basin late tonight. Deputy Executive Director at the Port of Grays Harbor Leonard Barnes told commissioners last week, the giant concrete structures will be floated to other terminals for inspection and preparation.
Some are stored at a moorage facility in the harbor, North of John’s River until they are towed 260 nautical miles around the Olympic Peninsula to Lake Washington for the new State Route 520 floating bridge.
Ian Sterling with WSDOT tells KBKW they have another six pontoons for the new SR 520 floating bridge ready to float out from the casting facility in Aberdeen. Crews plan to work through the night on Tuesday, April 15, with the first pontoon scheduled to leave the casting basin close to midnight to coincide with the high tide necessary for float-out.
These six pontoons represent the fourth cycle built in Aberdeen, meaning two-thirds of the 33 pontoons being constructed there are now complete. Other bridge pontoons are being built in Tacoma. All told, 52 of the 77 total pontoons needed for the new bridge are now complete.
Six more SR 520 pontoons wait for high tide in Tacoma

Six more SR 520 supplemental stability pontoons are towed out of their Tacoma casting basin in pairs each evening, as the high tides allow.

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Six more SR 520 pontoons wait for high tide in Tacoma