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Hoffmann Construction was the contractor for the University District and Roosevelt stations Absher Construction was the contractor for Northgate Station Stacy and Witbeck was the trackwork contractor and Mass Electric was systems contractor.Įngineering and professional services consultancy WSP USA provided the project’s final design, which was completed in 2016. Construction of all three stations was substantially complete at the start of 2021, and since August, trains have been running simulated service, during which all Link trains continued without riders from University of Washington Station to Northgate, testing catenary traction power and signal systems, according to Sound Transit. Guideway construction wrapped up in 2018 and rail installation in 2019. Tunneling work was performed by JCM Northlink, a joint venture of Jay Dee Contractors, Frank Collucio Construction Company and Michaels Corporation, and twin boring machines completed the 3.5-mile tunnels in 2016. Voters approved the Northgate Link extension in 2008 as part of the Sound Transit 2 ballot measure, and construction began in 2012. The project’s $1.9 billion baseline budget includes a $615 million credit agreement under the Transportation Infrastructure Finance and Innovation Act (TIFIA), providing “significant long-term savings for regional taxpayers through reduced borrowing costs,” according to Sound Transit, which noted that the project is coming in about $50 million under budget. Additionally, the opening of Northgate provides connections to and from local and regional bus routes. Daily ridership is projected to reach 41,000-49,000 by 2022. (See map below.) Except for 0.8 miles of elevated track at Northgate, the 4.3-mile extension is in subway. The Northgate extension project adds three new stations, at Northgate (elevated), Roosevelt (underground) and U District (underground), with trips of just 13 minutes from Northgate to downtown Seattle, the agency reported. Service to Tacoma’s Hilltop slated to begin in 2022 East King County in 2023 and Lynnwood, Federal Way and Downtown Redmond in 2024, according to Sound Transit. Rail Fleet Decarbonization Opportunity: What Does it Mean for You?.