Lötschberg Base Tunnel

The Lötschberg Base Tunnel (LBT) is a 34.57 km (21.48 mi) railway base tunnel on the BLS AG's Lötschberg line cutting through the Bernese Alps of Switzerland some 400 m (1,300 ft) below the existing Lötschberg Tunnel. It runs between Frutigen, Berne, and Raron, Valais.

Lötschberg Base Tunnel
The Lötschberg Base Tunnel together with the century-old Simplon Rail Tunnel form the western part of the NRLA project
(yellow: major tunnels, red: existing main tracks, numbers: year of completion)
Overview
Official nameGerman: Lötschberg Basis Tunnel
LineLötschberg Line
LocationTraversing the Bernese Alps in Switzerland
Coordinates46.578°N 7.649°E / 46.578; 7.649 (Lötschberg Base Tunnel, northern portal)46.309°N 7.832°E / 46.309; 7.832 (Lötschberg Base Tunnel, southern portal)
SystemBLS, SBB CFF FFS
StartFrutigen, canton of Bern, 780 m (2,560 ft)
EndRaron, canton of Valais, 654 m (2,146 ft)
Operation
Work begun5 July 1999
Opened14 June 2007
OwnerBLS NETZ AG
OperatorBLS
TrafficRailway
CharacterPassenger, Freight
Technical
Length34.5766 km (21.4849 mi)
No. of tracksOne single-track tube for 20km, two single-track tubes for 14km
Track gauge1,435 mm (4 ft 8+12 in) (standard gauge)
Electrified15 kV 16.7 Hz
Operating speed
  • Maximal: 250 km/h (160 mph)
  • Operating (passenger): 200 km/h (120 mph)
Highest elevation828 m (2,717 ft)
Lowest elevation654 m (2,146 ft) (south portal)
Grade3–13 
Route map
to Bern
8.3
Reichenbach im Kandertal
(706 MSL)
10.4
Wengi-Ey junction
11.3
Wengi
13.5
Frutigen
(779 MSL)
Engstlige (~2.600 m)
Widi (~220 m)
To Brig by old route
Tellenfeld control office
North portal of base tunnel (34,577 m)
Mitholz
(western tube partly constructed)
Ferden Nord
(both tubes in
operation south of Ferden Nord)
Steg junction
(unfinished)
South portal of base tunnel (34,577 m)
Rhone bridge
(554 and 817 m)
To Lausanne
To Zermatt
64.9
Visp
to Brig and Italy

The Lötschberg Base Tunnel was built as one of the two centrepieces of the NRLA project (the New Railway Link through the Alps). Construction of the LBT commenced in 1999 and achieved breakthrough during 2005. A ceremony to mark its completion was held in June 2007; the first train operations began in December 2007. Cost of constructing this initial bore is estimated to be SFr4.3 billion ($3.59 billion). Within only a few years of opening, the LBT had become saturated because of a 21 km (13 mi) single-track section present; without the completion of the second bore, its overall capacity has been greatly reduced. During 2016, a planning contract was awarded for the completion of the second track of the LBT, which has been estimated to cost 1 billion Swiss francs. The resulting plan was presented in Spring 2019. A decision between a full or partial completion of the second tube of the Lötschberg Base Tunnel is expected in 2023.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.