There has been a lot of proposals to dam up massive unpopulated sea-facing valleys in Mayo and Donegal and use pumped hydro with seawater. Was a bit topic 15 ye

There has been a lot of proposals to dam up massive unpopulated sea-facing valleys in Mayo and Donegal and use pumped hydro with seawater. Was a bit topic 15 years ago, but never happened. All that happened was the silvermines pump hydro plant that seems behind schedule. Prof Igor Shvets was behind this: https://en.wikipedia.org/wiki/Spirit_of_Ireland https://en.wikipedia.org/wiki/Spirit_of_Ireland