Another milestone for new SR 520 floating bridge

SEATTLE – Construction of the new State Route 520 floating bridge across Lake Washington reaches another milestone this weekend with the first permanent placement of a bridge pontoon on the lake’s west side.

The 240-foot-long, 10,000-ton Pontoon A, with large roadway-support columns mounted atop its deck, will be the new bridge’s western-most pontoon. Pontoon A and Pontoon W, now anchored near the lake’s eastern shoreline, will bookend the floating bridge’s 21 longitudinal pontoons. The latte …read more

From: WSDOT Northwest Travel News