Grafenort – Engelberg Tunnel
|Length||4,043 m (13,264 ft)|
|Track gauge||1,000 mm (3 ft 3 3⁄8 in) metre gauge|
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. Thanks to timetable changes, journey times between Engelberg and Zurich/Bern have been shortened by 19 minutes.
Great care had to be taken with risk assessments and mitigation; some surrounding areas are very vulnerable to floods, landslides, or avalanches. Serious flooding in 2005 not only disrupted tunnel construction, but also trapped 1500 tourists in Engelberg, who had to be airlifted to safety.
Construction of the tunnel posed several severe technical challenges; 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.
- "Zentralbahn Tunnel Engelberg". Retrieved 2011-02-13.
- "Neuer Steilrampentunnel zwischen Engelberg und Grafenort eröffnet". CASH. Archived from the original on 2011-07-06. Retrieved 2011-02-13.
- "Railway Gazette: Less steep underneath". Retrieved 2011-02-13.
- "Engelberg in Rekordzeit zu erreichen". Retrieved 2011-02-13.
- "Natural Hazards in Engelberg" (PDF). Retrieved 2011-02-13.
- "New Rail Tunnel To Engelberg Opening". Retrieved 2011-02-13.
- "New rail tunnel set to open in Engelberg this month". Retrieved 2011-02-13.
- "Der Engelberg-Tunnel und die Macht des Berges" (PDF). Archived from the original (PDF) on 2011-07-07. Retrieved 2011-02-13.
- "Im Steilrampentunnel schneller nach Engelberg". Retrieved 2011-02-13.