Kölnbrein Dam

The Kölnbrein Dam is an arch dam in the Hohe Tauern range within Carinthia, Austria. It was constructed between 1971 and 1979 and at 200 metres high, it is the tallest dam in Austria. The dam's reservoir serves as the primary storage in a three-stage pumped-storage power system that consists of nine dams, four hydroelectric power plants and a series of pipeline and penstocks. The complex is owned by Verbund power company and is referred to as the Malta-Reisseck Power Plant Group. The installed capacity of the group is 1,028.5 MW and its annual generation is 1,216 gigawatt-hours.

While the dam's reservoir was filling, several cracks appeared in the dam and it took more than a decade of repairs before the reservoir could operate at maximum levels. Currently, the Reisseck II pumped-storage power plant is under construction and will effectively connect both the Malta and Reisseck groups and add an additional 430 MW of production capacity.