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Grafenort – Engelberg Tunnel
Railway tunnel in Switzerland / From Wikipedia, the free encyclopedia
Not to be confused with the Engelberg road tunnel in Germany.
The Grafenort – Engelberg Tunnel is a railway tunnel on the Luzern–Stans–Engelberg-Bahn line, which forms one portion of the Zentralbahn in Switzerland. It replaced the steepest section of the line, an inclined length of 1,600 meters that had a peak gradient of 25%, allowing for a faster transit since its completion.
Quick Facts Overview, Line ...
Overview | |
---|---|
Line | Luzern–Stans–Engelberg-Bahn |
Location | Engelberg, Switzerland |
Status | Active |
Operation | |
Constructed | 2001–2010[1] |
Opened | 12 February 2010[2] |
Owner | Zentralbahn |
Operator | Zentralbahn |
Traffic | Rail |
Character | Passenger and freight |
Technical | |
Length | 4,043 m (13,264 ft) |
No. of tracks | 1 |
Track gauge | 1,000 mm (3 ft 3+3⁄8 in) metre gauge |
Electrified | Overhead catenary 11 kV AC 16 2/3 Hz |
Grade | 10.5% |
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Following a number of preparatory surveys and assessments, construction of the tunnel commenced during March 2000. Work was delayed by two years due to a particularly severe flood that started in August 2005; it had been recognised beforehand that water ingress was a particular threat, thus the project included the construction of a concrete inner vault. The completed tunnel was officially opened during February 2010.[3]