I heard about this on the radio whilst driving back in from Barberton today:
This collapse appears to be related to tunneling for the Gautrain project. The drillers apparently – and unexpectedly – hit soft, unconsolidated sediment and closed off the road before part of it disappeared, so fortunately nobody was injured. The water in the hole is from a burst main. Has someone not been doing their ground surveys properly, I wonder? And what are they going to do if this unconsolidated stuff goes deeper than the depth of the current tunnel?
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