The tunnel boring machine, which started excavating from Châtelard at the beginning of 2010, will break through the last few metres of the principal gallery leading to the machinery cavern in summer 2012. This colossal machine, which is 142 meters long with a diameter of 9.45 meters, has already tunneled 4 km of the total gallery length of 5.6 km. At present, it is located 180 meters beneath the bed of the Emosson reservoir and advancing at a rate of 10 to 20 meters per day.
Nant de Drance hydropower project enters crucial phase
No comments:
Post a Comment