{"id":6833,"date":"2017-01-01T12:03:17","date_gmt":"2017-01-01T12:03:17","guid":{"rendered":"https:\/\/www.systra.com\/ibt\/?post_type=projects&p=6833"},"modified":"2026-04-15T23:50:06","modified_gmt":"2026-04-15T23:50:06","slug":"sound-transit-south-200th-link-extension-seattle-washington","status":"publish","type":"projects","link":"https:\/\/www.systra.com\/ibt\/project\/sound-transit-south-200th-link-extension-seattle-washington\/","title":{"rendered":"Sound Transit South 200th Link Extension \u2013 Seattle, Washington"},"content":{"rendered":"\n
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Technical details<\/div>\n \t
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Customer<\/div>\n\t
Sound Transit – Central Puget Sound Regional Transit Authority<\/div>\n\t <\/div>\n
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Dates<\/div>\n

Construction Completed: 2017<\/p>\n<\/div>\n <\/div>\n

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Localisation<\/div>\n
Seattle, Washington<\/div>\n <\/div>\n
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Partners<\/div>\n
Design\/Build Contractor: PCL Construction Services, Prime Consultant: HDR Engineering, Inc.<\/div>\n <\/div>\n
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Activity<\/div>\n
SYSTRA IBT's Role: Segmental Superstructure Design Consultant<\/div>\n <\/div>\n \n \n <\/div>\n\n\n\n
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DESIGN-BUILD<\/h2>\n\n\n\n

Total Length: <\/strong>1.6 miles (2.6 km) of double-track light rail.
Span length:<\/strong> 130 ft 6 in (39.8 m)<\/p>\n<\/div><\/div>\n<\/div>\n\n\n\n

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The South 200th Link Extension project expands the existing light rail system from Sea-Tac Airport to South 200th Street and 28th Avenue South. <\/strong><\/p>\n\n\n\n

The structural design involves the construction of 1.6 miles (2.6 km) of double-track light rail transit on an elevated guideway. The guideway is a precast segmental structure including twin track, and single-track box girders. Typical spans are simply supported with a maximum length of 130 ft 6 in (39.8 m). Continuous structures are used for longer spans up to 156 ft (47.5 m). <\/p>\n\n\n\n

The project includes two long-span bridges with main spans of 333 ft (101.5 m) and 363 ft (110.6 m) in the area surrounding the Sea-Tac Airport. Typical spans are erected span-by-span with an overhead truss; long spans are erected in balanced cantilever with cranes on the ground or on deck.<\/p>\n\n\n\n

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Featured Project<\/h2>\n
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