Mt Thorley is a medium sized thermal and semi-soft coking coal open cut mine in the Hunter Valley of New South Wales. Mt Thorley shares equipment and infrastructure with Yancoal's majority owned Warkworth mine, which is located adjacent to the mine. Both mines are run as an integrated operation. Yancoal acquired its interest in Mt Thorley following the acquisition of Coal & Allied from Rio Tinto in 2017. For a separate analysis on the underground project, please refer to the Mt Thorley (Underground) asset report.