Lynnwood Link extension construction now more than 25 percent complete, Sound Transit says

Drll shaft work in Shoreline in July. (Photo courtesy Sound Transit)

Civil construction on the Lynnwood Link extension is now more than 25% complete, marking a major milestone for the project, Sound Transit said Tuesday. The final drilled shaft was completed last Friday, and more than 130 of the project’s 188 columns are complete. In addition, 50 girder spans are now finished, the agency said.

“Thanks to the hard work of the construction team and our contractors, the pace of progress on the Lynnwood Link extension has been remarkable,” said Sound Transit CEO Peter Rogoff. “Groundbreaking on the project was just over a year ago, and civil construction is already a quarter of the way complete. When it’s finished, the extension will transform travel between King and Snohomish counties.”

The project made a major advance late last month with the first part of installation of falsework to support the elevated light rail guideway crossing I-5 in Mountlake Terrace. The falsework, the installation of which required the closure of the freeway’s southbound lanes overnight for three nights, consists of temporary steel column systems between and outside girders that support constructing the concrete deck that light rail trains will eventually travel over. The installation on the rest of the falsework, which will cross I-5’s northbound lanes, will be completed early next year.

In addition to the progress on the alignment, work is underway on three new garages, which will add 1,500 new parking spaces for riders in Shoreline and Lynnwood.

By 2024, Lynnwood Link and other extensions currently under construction will more than double the length of the region’s light rail system. After Lynnwood opens in 2024, passengers from the Lynnwood Transit Center will enjoy 20-minute rides to the University of Washington, 27-minute rides to downtown Seattle and 60-minute rides to Sea-Tac Airport. Trains from Lynnwood will also serve the Eastside and reach downtown Bellevue in 51 minutes. The extension includes four new stations serving Lynnwood, Mountlake Terrace, Shoreline and Seattle.

Stacy & Witbeck/Kiewit/Hoffman JV and Skanska Constructors L300 JV are executing the civil construction on the extension, and Mass Electric Corporation has recently been awarded the systems construction work. The $2.9 billion project budget includes up to $1.17 billion from a Full Funding Grant Agreement executed by the FTA. In addition, the U.S. Department of Transportation’s Build America Bureau executed a $658 million low-interest loan supporting the project. That loan was one of four loans captured in a Master Credit Agreement reached between Sound Transit and the USDOT at the end of 2016. The one-of-its-kind agreement should save regional taxpayers between $200 million and $300 million through lower interest costs.


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