Phillip Milton Geary

Rio Tinto’s Mount Thorley-Warkworth mine in the Hunter Valley, which looks set to expand further. The NSW planning department says it would “not be reasonable” to require Rio Tinto “to completely or even partially backfill the final void”. Lock The Gate Alliance/Flickr

Disused mines blight New South Wales, yet the approvals continue

There are hundreds of derelict mine sites across New South Wales – and the state planning department has admitted it is “not aware of the total size” of large mining voids currently being left behind.

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