The Limberg 3 power plant is a pumped storage power plant with a total capacity of 480 megawatts. It will be built completely underground between the two existing reservoirs Mooserboden (water level 2,036 m) and Wasserfallboden (water level 1,672 m). The new structural, mechanical and electrical power plant facilities to be built are arranged in a system of caverns and tunnels. The tunnels to be excavated according to the NÖT have a total length of 2,240 m, the headrace tunnel to be excavated with TBM and the inclined pressure shaft have a length of approx. 4 km. The total excavation volume for the powerhouse cavern, transformer cavern and slide chamber is 74,500 m3.
Location: Kaprun, Salzburg; Austria
Client: VERBUND Hydro Power GmbH
Commissioned by: JV PSW Limberg III (Marti – Hinteregger – Porr)
Performance period: since 2021
Construction and heading survey for the construction of the tunnels and caverns as well as supply and installation of the geotechnical instrumentation for the caverns.