The ten biggest dams (in order of capacity) in South Africa are

The ten biggest dams (in order of capacity) in South Africa are:
Province Capacity River

(in million c metres)

Gariep OFS 5340 Orange

Vanderkloof OFS 3171 Orange

Sterkfontein OFS 2616 Nuwejaars spruit

Vaal OFS 2603 Vaal

Pongolapoort Dam KZN 2267 Pongola River

Bloemhof OFS 1240 Vaal

Theewaterkloof W Cape 480 Riviersonderend

Heyshope Dam MPU 451 Assegaai River

Woodstock Dam KZN 373 Tugela River

Loskop Dam MPU 362 Olifants River

Dams in Lesotho

Katse Dam Lesotho 1519.1 Malibamatso River

Mohale Dam Lesotho 857.1 Senqunyane River