On 14 May 2024  the TBM Ida, launched back in June 2023, reached its first 3 km of excavation towards the south, in the West line tunnel, advancing an average of 13 m/day and extracting 342,060 m³ of rock. The TBM has a further  5.4 km to drive. 

TBM Ida, has already passed the critical fault zones called Viggartal and Walzn without any problems. The other TBM Lilia  - has now excavated 2735 m and is also preparing to reach the 3 km milestone. 

The TBMs have so far installed lining rings consisting of six precast concrete segments weighing 60 t each: to date, some 17,300 segments have been laid in the two tunnels, produced by the in-house factory and thus avoiding around 27,000 road trips by trucks. 

 For further information on the project click here, at/16 and it/103 for the tunnelbuilder archive. Visit https://www.bbt-se.com/. 21/24.