CERN - important breakthrough achieved!

The 60 metre deep main shaft with a diameter of 12 metres has already been completed since the end of February. Starting from this shaft, the cavern and two of the four demanding connections to the existing facility have been excavated to date.

Marti Tunnel AG
Seedorffeldstrasse 21
CH-3302 Moosseedorf
+41 31 388 75 10