Bens Creek said all remedial work on the preparation and wash plant at its US-based metallurgical coal mine has been completed and it will undergo two weeks of final testing before full operations start.
The remediation work included substantial repairs and upgrades including an evaluation and replacement of conveyors, dryers and screens.
Adam Wilson, chief executive, said: "We are very satisfied with the progress of the remedial works that have been undertaken on the preparation and wash plant which is in line with our expectations.
"We are now looking forward to commencing full processing of our production output.
"The preparation and wash plant has a capacity of 350 tons per hour, which provides Bens Creek with substantial scope to increase production beyond the initial volumes agreed with our offtake partner, Integrity."
Bens Creek added it had also completed the purchase of a second highwall miner, which will be deployed ahead of the initially scheduled timetable of the second quarter of 2022.
The new highwall miner means production capacity can double within a short period of time, Wilson added.