Water seeping into the exploratory system in Polmengo
Water seeping into the exploratory system in Polmengo, 1996 (AlpTransit Gotthard Ltd)
An event offers an insight into the history of the NRLA through texts, photos, films and infographics. This document is part of the following events.
The Piora Basin, with its sugar-grain rock, threatens to endanger construction of the Gotthard Base Tunnel.