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The Seikan Tunnel (Japanese: 青函トンネル, Seikan Tonneru or 青函隧道, Seikan Zuidō) is a 53.85 km (33.46 mi) dual-gauge railway tunnel in Japan, with a 23.3 km (14.5 mi) portion under the seabed of the Tsugaru Strait, which separates Aomori Prefecture on the main Japanese island of Honshu from the northern island of Hokkaido.
Longest railway tunnel until Seikan Tunnel was opened. Water supply Eucumbene-Tumut Tunnel [43] New South Wales, Australia 22,200 m (13.794 mi) 1959 Part of the 145 km tunnel network of the Snowy Mountains Scheme: Road WestConnex: Sydney, New South Wales, Australia 22,000 m (13.670 mi) 2023 (2019–2020 partial completion) Railway
The 3 ft (914 mm) narrow-gauge line descends from the Seikan Tunnel Memorial Hall, near Cape Tappi, into an underground station on the Seikan Tunnel, which is one of the longest railway tunnels in the world (which opened in March 1988), second to the Gotthard Base Tunnel in Switzerland that opened in June 2016. [2] [3]
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(1): Main tunnel. 11-11.4 metres wide. Horseshoe shape shown, but a circular cross section was used in areas with difficult geology. (2): Service tunnel. 4-5 metres wide. Sprayed concrete thickness 0.12-0.15 m. Horizontally, the service tunnel is located 30 m away from the main tunnel (centrelines) (3): Pilot tunnel. 3.6-5 metres wide. Sprayed ...
Nakayama Tunnel - Jōetsu Shinkansen: Shiozawa Tunnel - Jōetsu Shinkansen: Uonuma Tunnel - Jōetsu Shinkansen: Bentenyama Tunnel - Tōkaidō Shinkansen: 1963: 1.316 km Horikoshi Tunnel - Tōkaidō Shinkansen: 1963: 1.415 km Izumigoshi Tunnel - Tōkaidō Shinkansen: 1963: 3.193 km Kanbara Tunnel - Tōkaidō Shinkansen: 1968: 4.934 km Makinohara ...
The Channel Tunnel linking England with mainland Europe is about 31.34 miles (50.44 km) long; the Seikan Tunnel, an ocean tunnel linking Hokkaido with Honshu in Japan is 33.46 miles (53.85 km) long; and the Swiss Gotthard Base Tunnel through the Alps, opened in 2016, is 35.7 miles (57.5 km) long.
Here we go again. Gov. Gavin Newsom’s administration revived the Delta tunnel project Wednesday, unveiling a downsized version of the controversial, multibillion-dollar plan to re-engineer the ...