| The hydropower plant started operation in 1967 as a load peak plant with weir, reservoir, embedded penstock and external power house in the village Unterbaech in the canton Vallis. To reduce the maintenance and make energy production more efficient, the plant was refurbished in 1995.
Technical data:
Gross head: 436 m
Design discharge: 0.25 m³/s
Installed capacity: 1.000 kVA
Annual energy generation: 5.3 GWh
Voith Siemens Hydro’s share:
- general and final design
- civil works
- 1 Pelton turbine
- hydraulic steel structures
- crane
- generator, transformers, protection, AC/DC system
- 16 kV medium voltage system
- 400 V low voltage system
- instrumentation and control equipment
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