 The Cruachan Power Station ( also known as the Cruachan Dam ) is a pumped @-@ storage hydroelectric power station in Argyll and Bute , Scotland . The turbine hall is located inside Ben Cruachan , and the scheme takes water between Cruachan Reservoir to Loch Awe , a height difference of 396 metres ( 1 @,@ 299 ft ) . It is one of only four pumped storage power stations in the UK , and is capable of providing a black start capability to the National Grid . 
