In four short days crews were able to float-out all six supplemental stability pontoons leaving the casting basin empty. In early January 2014, crews will begin work inside the casting basin on the fifth cycle of pontoons.
Tags: Tacoma SR 520 WSDOT Washington State Department of Transportation Floating Bridge and Landings Project ^JW SR 520 Bridge
The tug boat ‘Mudcat’ gets in position to float-out the fourth cycle of pontoons.
Tags: Tacoma SR 520 WSDOT Washington State Department of Transportation Floating Bridge and Landings Project ^JW SR 520 Bridge
Working inside the coffer cell on Lake Washington, crews have begun repair work underneath Pontoon V’s keel slab. Epoxy injection has been completed. The parts visible in this photo will be grounded off prior to the application of carbon-fiber wrap.
Tags: WSDOT SR 520 Washington State Department of Transportation SR 520 Floating Bridge Pontoons Pontoon V State Route 520 KGM Floating Bridge ^JW Pontoon repairs
In December 2013 crews joined Pontoon V with the coffer cell to complete crack repairs. Working inside the coffer cell means that crews are working beneath the 11,100 ton pontoon more than 25 feet below the surface of Lake Washington.
Tags: WSDOT SR 520 Washington State Department of Transportation SR 520 Floating Bridge Pontoons Pontoon V State Route 520 KGM Floating Bridge ^JW Pontoon repairs
Carpenters stayed out of the rain on Dec. 12, 2013 at the Aberdeen construction site, preparing formwork and internal components for the massive pontoons.
Construction crews are underway on the fourth cycle of SR 520 bridge pontoons in Aberdeen. In this cycle, crews will build six total pontoons:
• Four longitudinal pontoons (360 ft. x 75 ft. x 29 ft.)
• Two supplemental stability pontoons (98 ft. x 60 ft. x 28 ft.)
Tags: ^TH WSDOT Washington State Department of Transportation Kiewit Bridge Construction Pontoon Floating bridge SR 520 State Route 520 Aberdeen Ironworker SR 520 Pontoons Cycle 4