Last week we completed the drilling of a 460 m long tunnel on behalf of Nottveit Energi AS.
This project was drilled in 2 sections, the first being the 0,7 m pilot hole, and the second section was reaming the pilot hole to a diameter of 1,2 m.
The tunnel started with a 5 degrees incline, and ended at 55 degrees.
The construction site was 100 m inside a tunnel hall.