On 07/04/2022 about a month after the start of the excavation work, the last main tunnel below the Eisack riverbed for the future railway Brenner Base Tunnel has broken through.  

A total of four tunnel sections have been driven under the river since 2020. The excavation of the tunnel below the Eisack was only possible after the ground was frozen with liquid nitrogen and then - to maintain the low temperatures - kept stable with a saline solution.  

This breakthrough is another important step, both for the connection of the two construction lots under the Eisack and Mules 2-3 and for the construction of the Brenner Base Tunnel in general. Click here, at/16 and it/103 for further detailed information in the tunnel builder archives. Visit https://www.bbt-se.com/. 14/22.