The Gougra power plant harnesses the power of the waters from Val d’Anniviers and the Turtmann Valley thanks primarily to the Moiry dam, which was constructed in 1954 above Grimentz. The dam is 148 meters high and 610 meters long. The water is fed from the reservoir to the power stations in Mottec, Vissoie and Chippis (Navizence).
Moiry dam – alt. 2249 m
- Type: Arch-gravity dam
- Concrete volume: 814,500 m3
- Height: 148 m
- Length: 610 m
- Reservoir capacity: 77 million m3
Turtmann dam – alt. 2177 m
- Type: Arched prestressed concrete dam
- Height: 30 m
- Length: 110 m
- Reservoir capacity: 780,000 m3
Moiry-Mottec head – Collected in the Moiry reservoir
- Headrace tunnel: Length 3,380 m, diameter 2.4 m, capacity 12 m3/s
- Geology: Gneiss
- Pressure shaft: Length 1,050 m, diameter 1.7/1.5 m, incline 80 %
- Energy coefficient: 1.324 to 1.551 kWh/m3
Mottec-Vissoie head
- Headrace tunnel: Length 6,910 m, diameter 2.4 m, capacity 12 m3/s
- Geology: Gneiss
- Pressure line: Length 900 m, diameter 1.7/1.5 m, incline 68 %
- Energy coefficient: 0.986 kWh/m3
Vissoie-Chippis head
- Pressure tunnel: Length 8,500 m, diameter 2.3/1.9 m, capacity 11.5 m3/s
- Geology: Paragneiss
- Pressure line: Length 1,106 m, diameter 1.67 m, incline 70 %
- Energy coefficient: 1.277 kWh/m3
Facts & figures
Plant type:
Storage power plant
Location:
Zernez, Switzerland
Number of turbines:
Ova Spin: 2 Pump-turbines, 2 Francis pump-turbine/ Pradella: 2 Francis turbines / Martina: 2 Francis turbines
Capacity:
410 MW
Shareholding:
22 %
Commissioning:
1970 / 1994
Average annual production:
1,418 GWh
Guided tours:
Yes
Status:
In service
