Société Electrique de l'Our S.A., an incorporated company under Luxembourg law, operates a pumped-storage power plant (PSP) in Vianden, run-of-river hydroelectric stations on the Moselle and Our rivers as well as windfarms in Luxembourg. The main shareholders are the Grand Duchy of Luxembourg and RWE Power, each holding 40.3%. Dispatching the Vianden PSP is the preserve of RWE Power by contractual arrangement. This means that RWE's power-plant portfolio has a turbine capacity of up to 1,096 MW at its disposal.