Excavation and provisional lining of the following structures:

• Upper Forcing Tunnel with 280 m and 51m2;
• Access Tunnel to the Upper Bifurcator with 193 m and 31 m2;
• Well Branch with 60 m and 88 m2;
• Cable Gallery with 55 m and 22m2;
• Power Station Vault with 120 m and 150 m2;
• Vault of the Transformer Chamber with 81 m and 120 m2;
• Underground Forced System Tunnel with 606 m and 26 m2;
• Access Tunnel to the Balance Chimney with 100 m and 25 m2.
• Temporary lining by the Shaftlinning technique of 2 shafts 270 m and 2.4 m in diameter.

The quantities of work performed were: Excavation 88,312 m3; Shotcrete 2,690 m3; Steel pole nailing 16,690 m; Swellex nailing 210 un; Strapping 620 ml; Cambots 20 Ton.