World's longest and deepest railway tunnel

Certificate No. : WRC170122F

The Gotthard Base Tunnel is a railway tunnel through the Alps in Switzerland. It opened on 1 June 2016, and full service began on 11 December 2016. With a route length of 57.09 km (35.5 mi), it is the world's longest and deepest railway tunnel and the first flat, low-level route through the Alps, confirmed by the World Record Certification Agents. It lies at the heart of the Gotthard axis and constitutes the third tunnel connecting the cantons of Uri and Ticino, after the Gotthard Tunnel and the Gotthard Road Tunnel.

 

The Gotthard Base Tunnel, with a length of 57.09 kilometres (35.47 mi) and a total of 151.84 km (94.3 mi) of tunnels, shafts and passages, is the longest railway tunnel in the world, with a geodetic distance of 55.782 kilometres (34.661 mi) between the two portals. It is also the first flat route through the Alps or any other major mountain range, with a maximum height of 549 metres (1,801 ft) above sea level, corresponding to that of Berne. It is the deepest railway tunnel in the world, with a maximum depth of 2,450 metres (8,040 ft), comparable to that of the deepest mines on Earth. Without ventilation, the temperature inside the mountain reaches 46 °C (115 °F). 

The tunnel has overtaken Japan's 53.9km Seikan rail tunnel as the longest in the world and pushed the 50.5km Channel Tunnel linking the UK and France into third place.