Project Information: Mainly Cavern 111 x 31.5 x 47 m, Transformer Caverna 62.2 x 17 x 13.5 m and Hydraulical connections. Includes a reservoir of 20 Hm³ connected to the Power Plant.
1,159 m total long three shafts and ramps. Flexible section between 10 to 66.5 m².
Also 920 m long tunnels and roadways, three ventilation tunnels with sections between 40 to 55 m².
Place: Cortes de Pallás
- Sección: Variable
- Longitud: 2,158 m
Overburden: 180 m
Method of Tunneling:
- NATM. Drill and blast
- Raise borer
Geology and Geotechnical Data:
- Calcareous marls with karst process and marlsly limestones
- Jumbo with two and three booms Tamrock Minimatic
- Wet – mix Aliva AL – 285 η = 9 – 21 m³/h