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OKSimplon storage power plant
The three power stations Tannuwald, Gabi and Gondo harness the water inflows from the catchment area south of the Simplon Pass to generate electricity. The water can be stored temporarily at the Fah, Eggen and Sera dams and made available as needed. The Gondo power station has been refurbished in 2017, the Tannuwald power station in 2020 and the Gabi power station in 2023.
Tannuwald power station – alt. 1400 m
2 vertical axis Pelton turbines
Total capacity: 8 MW
Gross head: 360 m
Average annual production: 22 GWh
Gabi power station – alt. 1300 m
2 vertical axis Pelton turbines
Total capacity: 19 MW
Gross head: 295 m
Average annual production: 44 GWh
Gondo power station – alt. 800 m
3 Pelton turbines (2 groups with horizontal axis, one group with vertical axes)
Total capacity: 53 MW
Gross head: 480 m
Average annual production: 198 GWh
Eggen reservoir – alt. 1596 m
Built: 1956 - 1957
Type: Embankment dam with bituminous coating
Reservoir capacity: 50,300 m3
Catchment area: 57 km2
Fah dam – alt. 1758 m
Built: 1979 - 1981
Type: Gravity dam in concrete
Height: 9 m
Crest: 48 m
Reservoir capacity: 41,000 m3
Catchment area: 17.3 km2
Sera dam – alt. 1278 m
1951-1952, new construction in 2010
Type: double-curved concrete arch dam
Height: 22 m
Crest: 81.5 m
Reservoir capacity: 180,000 m3
Catchment area: 143 km2
Facts & figures
Plant type: | Storage power plant |
| Location: | Gondo, Gabi, Tannuwald, Switzerland |
| Number of turbines: | Tannuwald: 2 Pelton turbines / Gabi: 2 Pelton turbines / Gondo: 3 Pelton turbines |
| Capacity: | 80 MW |
Shareholding: | 81.97 % |
Commissioning: | 1952/1957/1981 |
Average annual production: | 258 GWh |
Guided tours: | Yes |
Status: | In service |
Certificates
