Existing mines in NSW’s Upper Hunter region are approved to mine 241 million tonnes per year, but mined just 150 million tonnes in 2019/20. The difference of 91.5 million tonnes shows that there is no need for new coal projects in the state. Filling in the Upper Hunter’s final voids would cost between $12 billion and $25 billion, while the NSW Government holds just $3.3 billion in environmental bonds for all mines in the state.