I hope all 3 of those schemes succeed.

I visited the old slate mine in Northern Wales then being built into a pumped storage unit in 1979.

https://en.wikipedia.org/wiki/Dinorwig_Power_Station

The huge underground tunnels and vaults were very impressive.

I was invited to visit the Duke Power pumped storage unit in the 1990s but stupidly never got around to going.

https://www.duke-energy.com/energy-education/how-energy-works/pumped-storage-hydro-plants