The Langenprozelten Pumped Storage Station is a pumped storage power station near

Gemünden am Main Gemünden am Main (officially ''Gemünden a.Main'') is a town in the Main-Spessart district in the ''Regierungsbezirk'' of Lower Franconia (''Unterfranken'') in Bavaria, Germany and lies roughly 40 km down the Main from Würzburg. Gemünde ...

at the

Main Main may refer to: Geography * Main River (disambiguation) **Most commonly the Main (river) in Germany * Main, Iran, a village in Fars Province *"Spanish Main", the Caribbean coasts of mainland Spanish territories in the 16th and 17th centuries ...

in the under-Frankish district Main Spessart (

Bavaria Bavaria ( ; ), officially the Free State of Bavaria (german: Freistaat Bayern, link=no ), is a state in the south-east of Germany. With an area of , Bavaria is the largest German state by land area, comprising roughly a fifth of the total lan ...

), which went in service in 1976. The hydro-electric power plant has an output of . It uses two

Francis turbine The Francis turbine is a type of water turbine. It is an inward-flow reaction turbine that combines radial and axial flow concepts. Francis turbines are the most common water turbine in use today, and can achieve over 95% efficiency. The proces ...

s. The reservoirs are connected by long pipes. The maximum head is . The upper reservoir has a capacity of approximately . The maximum energy store ability amounts to . The station produces

traction current A railway electrification system supplies electric power to railway trains and trams without an on-board prime mover or local fuel supply. Electric railways use either electric locomotives (hauling passengers or freight in separate cars), ele ...

only and is an important peak load power station in the traction network for

railway Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in tracks. In contrast to road transport, where the vehicles run on a pre ...

s. The lower reservoir is fed by a creek, which is mostly dry in the summer. Therefore, if necessary, water is pumped from a further retention basin, which is situated below the lower reservoir. Both dams (of upper and lower reservoir) are rock fill

embankment dam An embankment dam is a large artificial dam. It is typically created by the placement and compaction of a complex semi-plastic mound of various compositions of soil or rock. It has a semi-pervious waterproof natural covering for its surface and ...

s with an asphaltic concrete external sealing. Coordinates are those of the lower reservoir.

Notes

Energy infrastructure completed in 1976 Hydroelectric power stations in Germany Pumped-storage hydroelectric power stations in Germany {{Germany-powerstation-stub