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Tag Archive for Lake Washington

More floating-bridge pontoons arriving on Lake Washington

SEATTLE – More pontoons for State Route 520′s new floating bridge are about to arrive in Lake Washington.

The first of two supplemental pontoons being towed this week from Tacoma to Lake Washington is scheduled to reach the Hiram M. Chittenden Locks late this afternoon or early evening, Wednesday, March 12. Tug boats then will guide the massive concrete box through the Lake Washington Ship Canal before reaching the lake’s western shore, likely in midevening. A second Tacoma-built supplemental …read more

SR520 Pontoons on the move in October

ABERDEEN – Two new State Route 520 bridge pontoons left Aberdeen for Seattle this weekend, while another two pontoons will follow next week. 

Currently, eight pontoons are located in the Grays Harbor area: two pontoons completed in Cycle 2 – longitudinal pontoons Q and R – and six pontoons completed in Cycle 3 – longitudinal pontoons M, N, O and P and supplemental stability pontoons BSW and BSE. 

The Cycle 2 pontoons are currently at a moorage site in Grays Harbor, while the Cycle 3 pontoons are at the Port of Grays Harbor. Pontoons BSW and BSE were towed last weekend, and pontoons Q and R will leave next week. Pontoons M, N, O and P will move to the Grays Harbor storage site. 

Key cracks repaired in SR 520 Pontoon W

SEATTLE, Wash. – Repairs to Pontoon W have been completed at a drydock location on Harbor Island, ensuring that cracks are sealed, the pontoon is watertight and the new State Route 520 bridge will meet its 75-year design life. This is the second of two pontoons repaired in drydock, while two remaining pontoons from Cycle 1 will be repaired on Lake Washington. The pontoon was floated out of the drydock on Tuesday afternoon Sept. 10.


“We’re very pleased with the results of the repairs implemented on pontoons T and W in drydock,” said Dave Becher, Washington State Department of Transportation construction manager for the SR 520 Floating Bridge and Landings Project. “We have ensured the watertightness of these pontoons by using epoxy injection, transverse post-tensioning, and applying carbon fiber wrap—all repairs endorsed by our expert review panel.” A video that shows and explains the repairs made to Pontoon W is available on YouTube.


Before returning to Lake Washington, however, contractor Kiewit/General/Mason, a Joint Venture (KGM) towed the pontoon to the Manson Construction Company facility on the Duwamish River to remove six round concrete columns built on the pontoon last fall. A total of 10 round columns and two box columns were built atop Pontoon W to support the future highway.

Macklemore praises Lady Washington from Lake Washington

ABERDEEN, Wash. - Hip-hop artists Macklemore and Ryan Lewis, one of the hottest pop music acts of 2013, have released a YouTube public service announcement in support of the tall ship Lady Washington, which appeared in their latest music video, “Can’t Hold Us.” The video praises the Aberdeen, Wash.-based vessel for its education programs for young people and features outtakes from “Can’t Hold Us.” In the PSA, the Seattle-based Macklemore asks viewers to support Lady Washington with an online donation.

The PSA is available at The Lady Washington donation page is at