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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]
The employee told Merideth in the email that, just recently, six of 12 passive articulation cylinders—the parts of the machine that would help Boring’s tunneling machine turn as it digs ...
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The Alaskan Way Viaduct replacement tunnel, is a $3.3 billion 2.83-kilometre (1.76 mi), double-decker bored highway tunnel under Downtown Seattle. Construction began in July 2013 using "Bertha", at the time the world's largest earth pressure balance tunnel boring machine, with a 17.5-metre (57.5 ft) cutterhead diameter. After several delays ...
The first boring machine used by TBC was Godot, a conventional tunnel boring machine (TBM) made by Lovat. [ 26 ] [ 27 ] TBC then designed their own line of machines called Prufrock. [ 28 ] Prufrock 1 was unveiled in 2020, and was used mostly for testing.
Alaskan Way Viaduct replacement tunnel, Seattle, Washington: 2005–2020 (est.) $4.1 billion (est.) [6] Ohio River Bridges Project, Louisville, Kentucky, and southern Indiana: 2020-2025 (est.) $3.9 billion (est.) [7] Hampton Roads Bridge–Tunnel, Hampton Roads, Virginia: 2001–2007 $3.6 billion [8] Central Texas Turnpike, area around Austin ...