Stammham Run-of-River Plant

VERBUND's power plant at Stammham is a run-of-river plant situated on the river Inn, near Dachlwand and Innhorn hills by the Alz estuary.

The Stammham power plant was built between 1953 and 1955 about 5 kilometres below the mouth of the river Alz. Three Kaplan turbines generate around 136 GWh of electricity per year and supply the region with valuable hydropower.
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Image from the Location

Owner VERBUND Innkraftwerke GmbH
Operator VERBUND Innkraftwerke GmbH
Commissioning 1955
Type Run-of-river power plant
Country Germany
Region Bavaria
Waters Inn
Output 23 MW
Annual output 136,430 MWh
Turbine Kaplan
Connectivity Fish bypass
Environmental protection at VERBUND

Ecology & environmental protection

A fish bypass has been available at the Stammham run-of-river power plant since 2015.

 All hydropower plants on the Inn comprise:
• the machinery hall with the turbines
• the weir systems for flood release
• the dams and dikes for the accompanying flood protection, and,
• the pumping stations and ditches, which guarantee agricultural use that existed before construction of the barrage.

The VERBUND hydropower plants on the Inn are therefore not only plants for electricity generation but also ensure 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: from creating continuity of flow with fish bypasses through to giving structure to bodies of water and connecting tributaries. In order to guarantee habitats for fish with all their habitat requirements, management of the gravel banks in the near-natural fish bypass or below the dam stage is additionally carried out. The maintenance of sediment continuity through sediment management, a topic of the EU Water Framework Directive (WFD) for species conservation in man-made rivers, is also an important component for the long-term conservation of fish fauna.

Our latest conservation projects
Turbines and generators: The Stammham run-of-river power plant is equipped with three Kaplan turbines, which are directly coupled with three three-phase generators. These generate around 136 GWh of electricity annually.

Weir system: Each of the five 18 metre-wide and 8.5 metre-high weir gates is designed as a roller gate with attached flap.