– Unbalancing shields: the control tower and section of the bottom outlet downstream from the shields were emptied, so leaving the shields subject to reservoir pressure. The dry work downstream of them the began.
– Cleaning and lighting the control tower. Initial access to the bottom drain. Lighting of this.
– Dry extraction of the old gates which had been disassembled by professional divers. The gates were hoisted 40 metres to the surface and then removed and placed in the Dam’s historical museum.
