A watchful eye as SR 520 pontoons float out of Tacoma casting basin
A WSDOT engineer looks on as the T-pontoon squeezes between pontoons in the casting basin. The T-pontoon, specially built for these pontoons, removes the supplemental stability pontoons from the casting basin in pairs.
Beginning July 27, 2013, crews floated eight supplemental stability pontoons out of the casting basin in which they were constructed, at the Concrete Technology Corporation site in Tacoma, WA. These pontoons are the third of six of cycles of pontoons to be completed at this site.
After each cycle, pontoons are inspected and temporarily moored prior to being towed to Lake Washington and used in assembly of the new SR 520 floating bridge.
A watchful eye as SR 520 pontoons float out of Tacoma casting basin
A WSDOT engineer looks on as the T-pontoon squeezes between pontoons in the casting basin. The T-pontoon, specially built for these pontoons, removes the supplemental stability pontoons from the casting basin in pairs.
Beginning July 27, 2013, crews floated eight supplemental stability pontoons out of the casting basin in which they were constructed, at the Concrete Technology Corporation site in Tacoma, WA. These pontoons are the third of six of cycles of pontoons to be completed at this site.
After each cycle, pontoons are inspected and temporarily moored prior to being towed to Lake Washington and used in assembly of the new SR 520 floating bridge.