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Sound Transit 770 Airport Link

Project type:

Light Rail Transit

Services:

Preliminary and final design, and construction support

Construction cost:

$155 million

Awards won:

2010 Engineering Excellence Gold Award, American Council of Engineering Companies (Washington)

National Recognition Award - ACEC

Undertaken to create flexibility for future capacity and the 2010 Winter Olympics in nearby Vancouver, BC, the 770 Airport Link is a critical component of Seattle’s Sound Transit network.

Connecting downtown Seattle to Seattle-Tacoma International Airport, the 1.7-mile LRT guideway includes 0.9 miles of elevated trackwork, three long span structures over key highways and roads, a pedestrian bridge and drop-off area, and a signature station at the south terminus.

Mott MacDonald had been previously contracted to design Sound Transit’s 5-mile Tukwila alignment. It was chosen again for the 770 Airport link as a follow-on assignment.

The preliminary and final design of the alignment was our responsibility, and drew expertise from in-house civil, rail alignment, structural, station architecture, geotechnical, survey, landscape architecture, traffic and systems integration subgroups. The alignment was optimized to allow for minimum intrusion into the Seattle landscape while maximizing LRT vehicle speed.

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