There are several large pumped-storage plants in the USA too. They can provide about 2 GW for one day, enough to completely power a city of 1M people, or to smo

There are several large pumped-storage plants in the USA too. They can provide about 2 GW for one day, enough to completely power a city of 1M people, or to smooth out supply fluctuations for a much larger region. https://en.wikipedia.org/wiki/Raccoon_Mountain_Pumped-Storage_Plant https://en.wikipedia.org/wiki/Raccoon_Mountain_Pumped-Storag... https://en.wikipedia.org/wiki/Bath_County_Pumped_Storage_Station https://en.wikipedia.org/wiki/Bath_County_Pumped_Storage_Sta... https://en.wikipedia.org/wiki/Ludington_Pumped_Storage_Power_Plant https://en.wikipedia.org/wiki/Ludington_Pumped_Storage_Power...