The Gregory Crinum mine, comprises the Crinum underground mine and Gregory open cut mine. Production commenced at Gregory in 1979, Crinum mine (longwall) commenced in 1997. Production at Gregory open-cut mine ceased in October 2012. Production at Crinum underground mine ceased in November 2015. On 27 March 2019, BMA completed the sale of Gregory Crinum Mine to Sojitz Corporation.
The underground mining area was successfully re-entered in late October 2020. On Nov. 4, 2021, Mastermyne has restarted surface works at the Crinum coal mine in Queensland following an incident involving a fall of ground in September 2021. The mine had been progressing through re-establishment. Access to both drifts is temporarily suspended pending the finalisation of investigations and completion of the safe re-entry plan. This incident is predicted to delay the mine’s first coal production by about 12 weeks.