The Washington State Dept. of Transportation is creating a list of best construction practices for floating bridges, based on results of tests conducted on a pontoon built at one-sixth the typical ...

The final eight “supplemental stability pontoons” for the new State Route 520 floating bridge floated out of their casting basin this week, marking the completion of the 44 bridge pontoons built in ...

A bid to build the pontoons for a new SR 520 floating bridge have come in under the state’s estimate with a Kiewit-General Joint Venture submitting the apparent best price and technical proposal. The ...

ABERDEEN — Always mixing and tweaking, industrial engineers continue working to develop the right concrete recipe and process to build the strongest pontoons possible for the upcoming Highway 520 ...

A comprehensive review is due Tuesday of construction flaws found on pontoons for the new highway 520 floating bridge. Some of the 33 pontoons built in Aberdeen have arrived at Lake Washington with ...

ABERDEEN — The Transportation Department reports another milestone in construction of the casting basin at Aberdeen where pontoons for the new Highway 520 floating bridge will be built. A crane is ...

SEATTLE — Hood Canal Bridge contractor Kiewit-General has signed deals with Todd Pacific Shipyards of Seattle and Concrete Tech of Tacoma to build pontoons for replacing the eastern half of the ...

Small cracks have appeared in at least two the first six pontoons built for a new floating bridge in Lake Washington, but transportation officials said Friday the problem is manageable. Leaks can be ...

The Ferrovial Agroman Laing O'Rourke joint venture (FLO) has taken delivery of two Damen Stan Pontoons. FLO will deploy the vessels – a SPo 7120 and a SPo 4113 – for marine infrastructure construction ...