PHASE III - The operation to make the abduction paths back into operation. Following the previous operations carried out by the NEMO team, which consisted of unclogging to access the protective gratings of the GF2 and GF3 adduction channels, the removal of the gratings and the installation of protective guardrails to carry out the maintenance works by the beneficiary of the work, the 3rd stage follows of the project to remove the protective cofferdam and install the new protective grilles. the project is a multi-annual project with a consistent impact not only for the national energy system but also for the social and environmental.