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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 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.
Tunnel boring machine $2.1 billion megaproject [14] 2019– King County Ship Canal Water Quality Project 21.67 ft (6.61 m) and 8 ft (2.4 m) 2.7 mi (4.3 km) Largest tunnel boring machine named "Mudhoney" to construct combined sewer outflow storage tunnel under EPA consent decree. Two smaller machines for conveyance tunnels. [15] [16]
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The backside of Bertha the tunnel boring machine and the unfinished interior of the SR 99 tunnel, seen in January 2017. After the demolition of the viaduct's southernmost stretch and its lanes were realigned onto an adjacent bypass in 2012, crews began excavation of a 420-foot-long (130 m) launch pit to house the tunnel boring machine. [195]
No tunnel is worth a single person’s life.” Long hours and weekends, high expectations, and rigid deadlines are hallmarks of Elon Musk’s companies: Tesla, SpaceX, and X, formerly Twitter.
Beacon Hill tunnel is a public transit tunnel in Seattle, Washington, carrying light rail trains on the 1 Line under Seattle's Beacon Hill between Rainier Valley and SoDo just east of Interstate 5. [1] The Beacon Hill Link Light Rail station is approximately 160 feet (49 m) underground near the midpoint of the tunnel.