Opened by Her Majesty Queen Elizabeth II in 1965 , Cruachan can generate over 440MW of electricity during peak demand .
Opened by Her Majesty Queen Elizabeth II in 1965 , Cruachan use surplus electricity to pump water to the reservoir 300 meters above .
Opened by Her Majesty Queen Elizabeth II in 1965 , Cruachan can generate over 440MW of electricity during peak demand or use surplus electricity to pump water to the reservoir 300 meters above .