Driekloof Dam is a small section of the Sterkfontein Dam, Free State. A section of the Sterkfontein Dam reservoir is isolated after the construction of Driekloof Dam, this small reservoir has a capacity of 35,600,000 cubic metres.
Together with the Kilburn Dam almost 500 meters lower, Driekloof forms part of Eskom's Drakensberg Pumped Storage Scheme also known as the Tugela-Vaal pumped storage scheme and provides for up to 27.6GWh of electricity storage in the form of 275,000,000 cubic metres of water.
The water is pumped to Driekloof during times of low national power consumption (generally over weekends) and released back into Kilburn through four 250 MW turbine generators in times of high electricity demand.
The scheme is operated in such a way that there is a net pumping of up to 631,000,000 cubic metres/annum depending upon the water availability in the Tugela catchment (Woodstock Dam) as well as the need for augmentation in the Vaal Dam catchment.
The Driekloof Dam was commissioned in 1979, has a capacity of 32,071 cubic metres and a surface area of 1.906 square kilometres, the Dam wall is 47 metres high.
