Simplon storage power plant

The company operates three power stations in Gondo, Gabi and Tannuwald, which harness the power of the waters from the Simplon massif to generate electricity. The Gabi and Tannuwald stations are remotely controlled from Gondo. Two thirds of the annual electricity production volume is generated in summer.

Tannuwald power station – alt. 1400 m

  • 7 Francis turbines

  • Total capacity: 5.2 MW

  • Gross head: 363 m

Gabi power station – alt. 1300 m

  • 2 Pelton turbines + 1 Francis turbine

  • Total capacity: 11 MW

  • Gross head: 295 m

Gondo power station – alt. 800 m

  • 3 Pelton turbines

  • Total capacity: 45.4 MW

  • Gross head: 470 m

Eggen reservoir – alt. 1596 m

  • Built: 1957

  • Commissioned: 1958

  • Type: Embankment dam

  • Reservoir capacity: 50,300 m3

  • Catchment area: 57 km2

Fah dam – alt. 1758 m

  • Built: 1979

  • Commissioning: 1981

  • Type: Gravity dam

  • Height: 9 m

  • Crest: 48 m

  • Reservoir capacity: 41,000 m3

  • Catchment area: 17.3 km2

Sera dam – alt. 1278 m

  • Built: 1951, new construction in 2010

  • Commissioning: 1952

  • Type: 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: 7 Francis turbines / Gabi: 2 Pelton turbines + 1 Francis turbine / Gondo: 3 Pelton turbines

Capacity:

62 MW

Shareholding:

81.9 %

Commissioning:

1952/1958

Average annual production:

238 GWh

Guided tours:

Yes

Status:

In service

Certificates