JCI was also involved with numerous mining ventures – New State Mines at Brakpan, Modder Deep Mines at Benoni, Van Dyk Mines at Benoni. In the 1960s Randfontein was virtually closed down, and mining was developed at Western Areas on the other side of the shallow valley, but in the 1970s new deposits were discovered to the south of Randfontein and the Cooke Section was opened up in 1976. Cooke produced gold and uranium, the uranium being destined for the Koeberg Nuclear Power Station fuel.
