A busy casting basin
Within the 4-acre casting basin in Aberdeen, tug boats navigated through the six pontoons that make up Cycle 2. One by one, the pontoons were towed from the casting basin into Grays Harbor. Photo taken just before midnight, April 28, 2013
Progress continues on the SR 520 Pontoon Construction Project, as the second cycle of new pontoons left the Aberdeen casting basin overnight April 28 and 29, 2013. The late-night timing coincided with the favorable high tide needed for float-out.
In the second cycle, crews built three longitudinal pontoons, two supplemental stability pontoons and one cross pontoon. The 360-foot-long longitudinal pontoons are the backbone of the new SR 520 floating bridge being built on Lake Washington; the supplemental pontoons provide stability and flotation, and the cross pontoons cap the bridge on the east and west ends. Crews will build a total of six cycles of new pontoons in Aberdeen.
A busy casting basin
Within the 4-acre casting basin in Aberdeen, tug boats navigated through the six pontoons that make up Cycle 2. One by one, the pontoons were towed from the casting basin into Grays Harbor. Photo taken just before midnight, April 28, 2013
Progress continues on the SR 520 Pontoon Construction Project, as the second cycle of new pontoons left the Aberdeen casting basin overnight April 28 and 29, 2013. The late-night timing coincided with the favorable high tide needed for float-out.
In the second cycle, crews built three longitudinal pontoons, two supplemental stability pontoons and one cross pontoon. The 360-foot-long longitudinal pontoons are the backbone of the new SR 520 floating bridge being built on Lake Washington; the supplemental pontoons provide stability and flotation, and the cross pontoons cap the bridge on the east and west ends. Crews will build a total of six cycles of new pontoons in Aberdeen.