page_title: Porta Alpina
section_title: Design
hierarchical_section_title: Porta Alpina / Design
caption_attribution_description: English: The one kilometre long access tunnel from Sedrun to the shafts of Sedrun multifunction station (view from the portal)
context_page_description: Porta Alpina was a proposed railway station to be located in the middle of the Gotthard Base Tunnel, serving the Alpine village of Sedrun in Switzerland. It was intended to promote tourism and the economy in the region of Graubünden,
  The project was put on hold as uneconomical in 2007, and then indefinitely shelved in 2012. The current multifunction station is only used for emergency stops and maintenance. The portal lies 800 m above the tunnel.
context_section_description: Porta Alpina would have been by far the deepest underground train station in the world at 800 m (2,600 ft) underground, outclassing Arsenalna Metro station at 105.5 m (346 ft). It would also have connected the high-Alpine village of Sedrun and the Surselva to a major high-speed line from northern to southern Europe. The current station, along with Faido, is one of the two multi-function stations of the tunnel.
  The multifunction station is located near a crossover between the northbound and southbound tunnels and is linked to the surface by an elevator, using 800 m (2,600 ft) tall shafts and a 1 km (0.62 mi) long access tunnel, exiting over the Anterior Rhine, south of Sedrun. This access was used for the construction of the tunnel and is now an emergency exit of the tunnel. Construction costs for a fully functional passenger station were estimated at CHF 50M ($39M, €32M, or £22M) in 2005 with annual operating costs of CHF 2.5M. It was initially projected to be opened in 2016 after the Base Tunnel was scheduled to come into service.
caption: Access to the shafts
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