Hydroelectric power plant of Beauregard – Valgrisanche (Ao)
Construction of reservoir drainage tunnel for a length of 3,800 lm, section of Ø 3,40
Under-lake collection work, valves chamber and outlet channel
Construction of reservoir drainage tunnel for a length of 3,800 lm, section of Ø 3,40
Under-lake collection work, valves chamber and outlet channel