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The State Route 99 tunnel, also known as the Alaskan Way Viaduct replacement tunnel, is a bored highway tunnel in the city of Seattle, Washington, United States.The 2-mile (3.2 km), double-decker tunnel carries a section of State Route 99 (SR 99) under Downtown Seattle from SoDo in the south to South Lake Union in the north.
The Alaskan Way Viaduct ("the viaduct" for short) [1] [2] [3] was an elevated freeway in Seattle, Washington, United States, that carried a section of State Route 99 (SR 99). The double-decked freeway ran north–south along the city's waterfront for 2.2 miles (3.5 km), east of Alaskan Way and Elliott Bay, and traveled between the West Seattle Freeway in SoDo and the Battery Street Tunnel in ...
The route primarily follows arterial streets, including Aurora Avenue, and has several freeway segments, including the tolled SR 99 Tunnel in Downtown Seattle. SR 99 was officially named the William P. Stewart Memorial Highway by the state legislature in 2016, after a campaign to replace an unofficial moniker honoring Confederate president ...
Battery Street Tunnel, State Route 99, Seattle (closed and filled in 2019) Beacon Hill tunnel, Link light rail, Seattle; Burwell Tunnel, Bremerton Ferry Terminal to westbound State Route 304, Bremerton; Cascade Tunnel, BNSF Railway, near Stevens Pass; Downtown Seattle Transit Tunnel, Link light rail (and formerly buses), Downtown Seattle
Their company has supplied concrete for big technical projects like the Seattle’s State Route 99 tunnel, various floating bridges and the Tacoma Narrows Bridge, in addition to supplying material ...
It is mostly a surface-level highway with the exception of the SR 99 Tunnel through downtown Seattle. The tunnel was created to replace the Alaskan Way Viaduct , which was torn down in 2019. A 4-mile section of the old US 99 through unincorporated Hazel Dell and Salmon Creek , north of Vancouver, Washington is still known as NE Highway 99.
Freighter Fairpartner carrying the disassembled tunnel boring machine into the Port of Seattle in April 2013. Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and was the world's largest earth pressure balance tunnel boring machine, [14] at a cutterhead diameter of 57.5 feet (17.5 m) across.
The concrete barriers that were lining the the northbound side of Highway 99 were removed late last week, eliminating the “tunnel lane” that had plagued drivers for more than two years.