Grafenort – Engelberg Tunnel
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| Overview | |
|---|---|
| Line | Luzern–Stans–Engelberg-Bahn |
| Operation | |
| Opened | December 2010 |
| Technical | |
| Construction | 2001-2010[1] |
| Length | 4043m |
| Track gauge | 1,000 mm (3 ft 3 3⁄8 in) |
| Grade | 10.5% |
The Grafenort – Engelberg Tunnel is a railway tunnel built on the Luzern–Stans–Engelberg-Bahn, part of the Zentralbahn in Switzerland.[2]
Historically, the Luzern–Stans–Engelberg-Bahn had a very steep 25% incline between Grafenort and Engelberg; replacing this with a more direct tunnel has shortened uphill journey times by 14 minutes, and increased capacity.[3] Thanks to timetable changes, journey times between Engelberg and Zurich/Bern have been shortened by 19 minutes.[4]
Great care had to be taken with risk assessments and mitigation; some surrounding areas are very vulnerable to floods, landslides, or avalanches.[5] Serious flooding in 2005 not only disrupted tunnel construction, but also trapped 1500 tourists in Engelberg, who had to be airlifted to safety.[6][7]
Construction of the tunnel posed several severe technical challenges;[8] this also increased the cost, to 176.5 million CHF. As the tunnel allows the use of longer, faster trains, a new power station has been built to provide additional electrical power.[9]
References
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