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- 12:05, 3 July 2010 Jontas (Talk | contribs) uploaded File:Stwlan.dam.jpg ({{Information |Description=The upper reservoir (Llyn Stwlan) and dam of the Ffestiniog Pumped Storage Scheme in north Wales. The four water turbines at the power station can generate 360 MW of electricity within 60 seconds of the need arising.<br> Taken )
