Rosshag Pumped Storage Power Plant

Tyrol's second-largest pumped storage power plant, Rosshag, is in the municipality of Ginzling in the Zillertal Valley.

The Schlegeis reservoir at an altitude of almost 1,800 m supplies the water for the power plant. The Schlegeis alpine road takes a spectacular path past waterfalls and through natural rock tunnels into the breathtaking high mountains of the Zillertal up to the Schlegeis dam. Here, you can combine a wonderful mountain experience with a visit behind the scenes of hydropower on a guided tour of the dam wall.

More efficiency to ensure security of supply

VERBUND started investing heavily in efficiency enhancements at the Mayrhofen and Roßhag power plants in 2011. The modernisation of turbine, pump and generator components resulted in a 2% increase in efficiency. Over 70,000 households can thus be supplied with green electricity.

* Source: ENTSO-E Production 2017

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Owner VERBUND Hydro Power GmbH
Operator VERBUND Hydro Power GmbH
Commissioning 1972
Type Pumped-storage power plant
Country Austria
Region Tyrol
Waters Inn, Schlegeisgrund
Output 231 MW
Annual output 328,168 MWh
Turbine Francis
Connectivity No fish bypass
Environmental protection at VERBUND
Sustainable Rivermanagement is a project under the scientific direction of the University of Natural Resources and Life Sciences and e3 consult, which VERBUND Hydro Power GmbH co-financed as one of the consortium partners.
Achieving the environmental targets of the EU Water Framework Directive is just as essential for the national climate targets as for the implementation of the EU’s energy and climate packages. Over many years of cooperation between science, power generation and the authorities, the understanding between the interest groups has been deepened and meaningful, efficient solutions for the implementation discussed. A method has been developed to compare the ecological effects or the ecological improvement potential of individual surge-absorbing measures with the corresponding system-relevant as well as economic and business effects. Further information about the project can be found here.
Responsible treatment of the environment
Fish bypass
Four sets of machinery with vertical shafts and a total bottleneck capacity of 231,000 kW (incl. auxiliary machine) are installed in the Roßhag powerhouse. Each machine set, which has a total height of about 25 metres, consists of a motor generator, a Francis turbine, a two-stage single-flow pump and a hydraulic converter. The energy is diverted via a 220 kV overhead line to the Mayrhofen outdoor switchgear.
Schlegeis reservoir: The final level of the Schlegeis reservoir, which has a capacity of 126.5 million m3, is located at 1,782 metres above sea level. The geologically favourable conditions made it possible to use a 131 metre-high, double-curved arch gravity dam with an unusually large crown length of 725 metres as the reservoir’s closing structure.
Hydro consulting from VERBUND