South Africa’s Toxic Legacy
Mark Olalde
The story of South Africa’s failed mine closure system proves to be more and more complex as I investigate it further.
For example, I published a feature on sinkholes – initially a topic I did not see as overtly mining related – in The Star, Johannesburg’s oldest daily newspaper. I focused on an area about 50 miles west of the city, where sinkholes first began forming in the 1960s when mining houses pumped water out of the underground void in order to reach the gold reef. Roughly 2,500 sinkholes have been identified in South Africa, nearly half of them in this area. Now, the gold is running out, and mines are abandoned one by one. As mining companies walk away from their operations, pumping stops and the void is in danger of flooding. When underground compartments recharge with water due to mine abandonment, historic sinkholes are expected to reactivate and fall again.
I also reported stories on the potential for seabed strip mining off the country’s western and southern coasts for the Oxpeckers Center for Investigative Environmental Journalism and Inter Press Service. While the 6,000 abandoned mines that initially brought me to South Africa are terrestrial, the fishing industry and environmentalists fear the impacts from marine mining could be even more severe. The Department of Mineral Resources has historically failed to enforce proper rehabilitation, and marine mining relies on extraction methods that could disturb areas far greater than what is directly mined. Granted prospecting rights for offshore mining cover 10 percent of the country’s marine exclusive economic zone, and this untested mining method involves discharging its mine waste directly into the water column.
As I continue to investigate mine closure and rehabilitation, I imagine this trend of newly identified impacts and new stories will only grow larger.
For more of Mark’s Reporting, visit his project at “South Africa’s Toxic Legacy”










