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TRANSIT

The Puget Sound region is investing in light rail, commuter rail, and bus transit systems, and KBA is assisting clients with construction projects that provide transportation choices for our region. Transit agencies rely on KBA’s depth of experience in managing the construction and inspection of transit facilities that help keep local residents moving.

Downtown Redmond Link Extension

Client: Sound Transit
Location: Redmond, Washington
2020 - Present

KBA is providing construction engineering and inspection services for this $1.53 billion project that builds a new 3.4-mile light rail link from the Redmond Technology Station to downtown Redmond by 2024. Light rail will travel along SR 520 with two new stations in southeast Redmond, one at Marymoor Park, and the other in downtown Redmond in the residential and retail core.

Federal Way Link Extension

Client: Sound Transit
Location: Federal Way, Washington
2019 - Present

KBA is providing construction management and inspection services for this $2.45 billion project that adds approximately 7.8 miles of light rail from the Angle Lake Station in the City of SeaTac to the Federal Way City Center. The extension generally parallels SR 99 and I-5 freeway with stations at Kent/Des Moines, South 272nd Star Lake park-and-ride, and the Federal Way Transit Center.

Downtown Transit Tunnel Curved Rail Replacement

Client: Sound Transit
Location: Seattle, Washington
2024

The project replaced 500 feet of northbound track just south of Westlake Station at the sharpest curve in the Link system. The worn rails, causing a bumpy ride, posed a safety hazard. The work involved jackhammering concrete, removing old track, and embedding new rail in specialized grout. It also included replacing 58 bond boxes in the tunnel from north of Westlake Station to Royal Brougham, which were damaged by buses between 2007 and 2019, leading to signal failures. This required removing concrete, installing new mechanical connections, and using specialized grout. During the service interruption, five other projects, including rail repairs and cleaning artwork, were completed ahead of schedule.

Northgate Link Light Rail

Client: Sound Transit
Location: Seattle, Washington
2013 - 2021

KBA provided construction management and inspection services for the construction of the $440 million Northgate Link Light Rail extension. This GC/CM and DBB project constructed two 4.3-mile long segmentally lined, twin-bored, 21-foot diameter tunnels using EPB TBMs. Work also included the installation of 23 cross passages excavated at intervals between the bored tunnels using sequential excavation methods, between Maple Leaf Portal and the University of Washington Station. Project elements included two underground stations, an elevated station and guideway, a parking garage, and trackwork.

South 200th Link Extension Parking Garage

Client: Sound Transit
Location: Seattle, Washington
2015 - 2017

KBA provided construction management and inspection services for this $30 million Design-Build project. The 7-story, open-air parking structure contains 1,050 parking stalls, commercial retail space, and an architectural metal-tube façade. The parking garage is a concrete cast-in-place structure, the exterior finished with an artistic metal translucent screen. A new water quality and detention vault was provided for the garage and the mechanical, electrical, and fire protection systems are integrated with a building management system. Station Area Roadway upgrades included reconstruction of South 200th Street from International Boulevard to Des Moines Creek, installing a three-sided culvert bridge for fish passage, new utilities, and sidewalks, and concrete cantilever retaining walls.

Mukilteo Sounder Commuter Rail Station, South Platform

Client: Sound Transit
Location: Mukilteo, Washington
2012 - 2016

KBA provided construction management and inspection services for this $6.4 million Bid-Build project to construct a new south platform at Mukilteo Station. Project work included a new platform within the BNSF Railroad right-of-way, with 24-inch drilled shafts, shoring with Cooper E-80 loadings, concrete station platform, two steel and glass stair towers, elevators, overcrossing (above two live BNSF main lines), landscaping, and art elements. KBA staff is knowledgeable of BNSF’s rules and regulations regarding work near live tracks, and proactively work with the contractor to maintain a safe work environment.

© 2025 by KBA, Inc.

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