STV Strengthens Seattle’s East Side Connectivity in Partnership with Sound Transit

As Sound Transit continues its unparalleled expansion to meet the needs of an exponentially growing commuter population in the Puget Sound region, STV’s team is anticipating the debut of the East Link (2 Line) Extension, a transformative addition that brings light rail to Seattle’s East Side for the very first time.

STV, in joint venture with Mott MacDonald as Northwest Transit Systems Partners, has overseen the systems construction of several ambitious expansion projects on behalf of Sound Transit for more than seven years. For the 14-mile East Link Extension, which will connect Seattle, Mercer Island, Bellevue and Redmond, the joint venture has provided technical review and construction management services for traction power, communications, signaling and train control systems. All of these elements contribute to the efficient operation of trains as well as help create a safe and reliable experience for commuters.

The upcoming 2 Line opening introduces eight of the East Link’s 10 new stations, linking South Bellevue Station through downtown Bellevue and the Bel-Red area to Redmond Technology Station near Microsoft’s corporate headquarters. This marks a monumental occasion for Seattle’s East Side communities, enhancing connectivity and reducing travel time. Trains commenced running this line just last week, and the official opening is scheduled for this spring.

“Having designed the alignment and trackwork myself, it’s thrilling to see the 2 Line trains passing by from our office windows,” said Bryan Williams, P.E., STV vice president and Pacific Northwest area manager. “The upcoming 2 Line opening is yet another milestone in STV’s partnership with Sound Transit. We are proud to support this valued client in providing new connections and benefiting communities throughout the region.”

With two stations of the East Link Extension still under construction, which will connect South Bellevue to Mercer Island and across I-90 to Judkins Park and Downtown Seattle, STV will remain actively engaged in shaping the future of this transformative project. Upon completion of this final segment, the fully realized East Link will span an impressive 14-mile stretch and stand as the world’s only passenger light rail service operating over a floating bridge within the I-90 section linking Mercer Island and Seattle across Lake Washington.

Additionally, STV’s commitment to Sound Transit and to shaping the future of transit in the Seattle metropolitan area extends beyond the East Link project. Our joint venture, also responsible for the Northgate Link Extension which opened in 2021, is providing ongoing construction management services for the 8.5-mile Lynnwood Link Extension, connecting Northgate into Snohomish County.

“STV’s longstanding collaboration with Sound Transit has been a journey of innovation and growth,” said Ja-Mie Luey, P.E., STV vice president and West Coast rail systems manager. “As we stand on the brink of the 2 Line opening, I’m reminded of the transformative impact our work has had on Seattle, creating safe, efficient and community-focused transit solutions for this ever-evolving city.”