Cruachan Dam and reservoir, the site of the Cruachan Power Station, Scotland, UK. This pumped-storage hydroelectric power station takes water between Cruachan Reservoir to Loch Awe, a height difference of 396 metres. It is capable of generating 440 MegaWatts of electricity from four turbines. It can go from standby to full production in two minutes, or thirty seconds if compressed air is used to start the turbines spinning. When the top reservoir is full, Cruachan can operate for 22 hours before the supply of water is exhausted. At full power, the turbines can pump at 167 cubic metres per second and generate at 200 cubic metres per second.