The power plant stands at the gates to the town of Wasserburg, situated on the river Inn, in Bavaria.
The Inn draws a 180° curve loop the picturesque city with its colourful Gothic houses. Where better to locate a hydropower plant than here – in a city called Wasserburg. The flow energy of the Inn provides the necessary power to supply the city with 100% green electricity.
Right next to the Wasserburg power plant, a new 5 MW power train went into operation in 2009, generating approximately an additional 22 GWh per year. In the course of the construction work, the tailrace channel was also redesigned.
Owner: VERBUND Innkraftwerke GmbH
Operator: VERBUND Innkraftwerke GmbH
Commissioning: 1938
Type: Run-of-river power plant
Country: Germany
Region: Bavaria
Waters: Inn
Output: 24 MW
Annual output: 122,881 MWh
Turbine: Kaplan
Connectivity: Fish bypass under construction
The Wasserburg power plant, built by Innwerk AG between 1935 and 1938, consists of a powerhouse on the right bank and a weir on the left bank.
Each of the five machine sets consists of a Kaplan turbine and a three-phase generator. The five vertical-axis Kaplan turbines have a nominal output of 4,800 kW. Above them are five 5,000 kVA three-phase generators with a nominal voltage of 6.3 kV. The head is 7.2 metres and the flow rate is 465 m³/s.
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Each hydropower plant on the Inn comprises:
The VERBUND hydropower plants on the Inn are therefore not only plants for generating electricity but also improve flood protection in the region. VERBUND also focuses on improving the ecological conditions at individual sites and on restoring natural river landscapes. We implement a large number of measures in this regard, such as:
In order to guarantee habitats for fish with all their habitat requirements – from spawn to adult specimens – management of the gravel banks is additionally carried out in the near-natural fish bypass or below the weir. Another important component for the long-term conservation of fish fauna is the maintenance of sediment continuity through sediment management, a topic of the EU Water Framework Directive (WFD) for species conservation in man-made rivers.
Together with the Rosenheim and Wasserburg district fishing association, VERBUND undertook land restoration measures around the Rosenheim and Wasserburg reservoirs. These activities make a big contribution to conserving and improving the varied and biodiverse “Inn ecosystem”. The Wasserburg power plant is equipped with a fish bypass. Gravel spawning grounds in the tailwater have been ecologically enhanced in recent years, some old water systems redesigned and reactivated.
The shallow water zones in the dammed area are under conservation and were declared “Vogelfreistätte Innstausee bei Attel und Freiham” (Bird Sanctuaries Inn Reservoir at Attel and Freiham) by the Bavarian state government in 1982. The protected area begins 600 metres to the south of the dam stage and extends as far as the bridge at Griesstätt. The protected area encompasses 562 hectares of river and sedimentation areas, floodplain forest and steep forested banks.