Results for Geology

1915

The first base tunnel

Long before the Gotthard and Lötschberg, the first base tunnel in Swiss rail history is driven through the hills at Hauenstein near Olten.

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3 October 1993

Work begins

The NRLA is far more than just the Gotthard Base Tunnel, but the first exploratory boring for the NRLA project takes place at the Gotthard.

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26 November 2000

Geology and surveying

Tunnel construction depends on scientific knowledge. Geology helps to find ways through the rock.

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14 October 2008

Traversing the Piora Basin

The Piora Basin, with its sugar-grain rock, threatens to endanger construction of the Gotthard Base Tunnel.

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