Pumped water is used quite a lot here in South Africa to help handle peak load in the national grid. It's probably going to continue to play a huge role as we transition to more solar.
Drakensberg Pumped Storage, FS, 1,000MW
Palmiet Pumped Storage, WC, 400MW
Steenbras Pumped Storage, WC, 180MW
Steenbras is the only plant installed and maintained by City of Capetown, the rest are Eskom facilities (Its mentioned occasionally, by eskom, that load shedding continues over a weekend, or late evenings, to restore pumped storage for the week/productive hours)
https://en.wikipedia.org/wiki/List_of_power_stations_in_Sout...