The union representing Spring Creek mine workers will meet with the mine's management over the next two days to put their case for why the mine should stay open.
The Engineering, Printing and Manufacturing Union and workers met on Tuesday afternoon with the chairman and chief executive of the mine's owner, Solid Energy, about a review of the pit's future that could result in the loss of 370 jobs.
EPMU organiser Garth Elliott says Solid Energy's newly appointed chairman, Mark Ford, has promised to include the workers' concerns in a report he will present to the company's board on Friday on whether the mine should stay open.
"Trying to feel confident about it, but obviously they haven't come out with any announcements about their preferred options," he said.
"It was heartening to hear Mark Ford say that he was actually hired on to restructure the company, and keep as many people employed as possible."
No timeframe has been given for when a final decision will be made on the mine's future.