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Buildings & Architecture
Tunnels

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Channel Tunnel
Other

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Tunnels

The Channel Tunnel

Construction begins Click to show or hide the answer
A pilot hole, two inches (50 mm) in diameter, breaks through without ceremony Click to show or hide the answer
Englishman Graham Fagg and Frenchman Phillippe Cozette break through the service tunnel, and shake hands with the media watching Click to show or hide the answer
Official opening, by the Queen and President François Mitterand Click to show or hide the answer
Passenger service begins Click to show or hide the answer
Cost of construction Click to show or hide the answer
Number of workers who died British Click to show or hide the answer
French Click to show or hide the answer
Length of the Channel Tunnel Click to show or hide the answer
Length under the sea Click to show or hide the answer

Other

The world's longest rail or road tunnel (54 km, 33.5 miles, opened 1988); under the Tsugaru Strait, connecting Honshu and Hokkaido (Japan) Click to show or hide the answer
The first tunnel under the Thames – built by the Brunels as a foot tunnel, now part of the East London line on the London Underground – opened Click to show or hide the answer

For more details of the world's longest tunnels, see Mileages.

Road tunnel linking Italy to Austria through the Alps Click to show or hide the answer
US rail tunnel, opened in 1929, named after the mountain range that it passes under; provides a rail link to Seattle Click to show or hide the answer
Links Cheriton and Sangatte (san–gat) Click to show or hide the answer
Carries northbound M25 traffic under the Thames in East London; originally opened 1963, second tunnel opened 1980 Click to show or hide the answer
Opened in 1871, linking Italy and France in the Western Alps – the only Alpine road link from Italy to France while the Mont Blanc tunnel was closed Click to show or hide the answer
Swiss rail tunnel: opened in 2016 as the world's longest and deepest traffic tunnel (35.5 miles, 57km) Click to show or hide the answer
Switzerland: opened 1980 as the world's longest road tunnel (10 miles, 16km) – scene of a tragic fire in 2001 when 11 people died Click to show or hide the answer
Succeeded the Gotthard as the world's longest road tunnel, on opening in 2000 (Norway) – 15.2 miles, 24.5 km Click to show or hide the answer
Rail link between Bellinzona and Lugano, Switzerland – opened in 1913; a new tunnel (22 miles, 35 km) opened in 2007 Click to show or hide the answer
7.5 mile (12 km) tunnel under the Alps (from Pelerines, near Chamonix, to Entreves, near Courmayeur), closed for three years 1999–2002 following a fire in which 35 people died Click to show or hide the answer
The world's first successful underwater transport tunnel – completed in 1908 Click to show or hide the answer
The world's longest under–sea tunnel (although the Channel Tunnel has a longer under–sea portion) – opened in 1988, linking Honshu and Hokkaido Click to show or hide the answer
Opened in 1906, linking Italy and Switzerland through the Alps; allowed the opening of a variant route on the Orient Express (from 1919); 12.3 miles (20km) long, the world's longest rail tunnel until 1982 Click to show or hide the answer
Britain's longest, deepest and highest canal tunnel – 5,500 yards (5,029m) long – on the Huddersfield Narrow Canal, between Diggle (near Oldham) and Marsden (near Huddersfield); closed in 1943, re–opened in 2001; also the name of three railway tunnels, only one of which is still in use Click to show or hide the answer

© Haydn Thompson 2017