Check the one near Cape Town, Steenbras Dam. It is a set of two small dams near Cpt that uses a pumped storage scheme. It is currently used to provide load-shed

Check the one near Cape Town, Steenbras Dam. It is a set of two small dams near Cpt that uses a pumped storage scheme. It is currently used to provide load-shedding relieve during the day (cause the state owned entity Eskom is a failure). So basically, during the daytime, they generate power from it and then at night the pump the water back to the upper dam. As far as I know its been working without any problems. And since the dams are fairly natural and small, and right by the coast (so very little downstream effects), it seems a bit more sustainable. The only wish would be for these mountain ranges to have multiple geographies like this so we can have multiple small pumped storage schemes with as little as possible negatives.