Mount Thorley Warkworth

Mount Thorley Warkworth (MTW) is an integrated operation of two open cut mines located adjacent to each other, 15 kilometres south-west of Singleton in the Hunter Valley region of New South Wales.

Mount Thorley has been in operation since 1981, and after a business restructuring of mining company R.W. Miller, Coal & Allied became managers of the mine in 1989. Warkworth Mining began operations in the same year as Mount Thorley (1981).

Yancoal Australia acquired Mount Thorley Warkworth on 1 September 2017.

Yancoal manages Mount Thorley Warkworth on behalf of the joint venture partners:

  • Mount Thorley: Yancoal Australia Ltd (80 per cent) and POSCO Australia Pty Ltd (20 per cent).
  • Warkworth: Yancoal Australia Ltd (84.5 per cent) through CNA Warkworth Australasia Pty Limited and CNA Resources Limited, Nippon Steel Australia Pty Limited (9.53 per cent) and Mitsubishi Materials (Australia) Pty Limited (6 per cent).

For all reporting, environmental management, planning and approvals documents related to Mount Thorley Warkworth, please visit the Insite page here

Complaints hotline:                    1800 656 892 (freecall)

Blasting schedule hotline:         1800 099 669 (freecall)

Community information line:     1800 727 745 (freecall)

Mining and production

Mount Thorley Warkworth is an open cut mine, using a dragline truck and shovel method. Employees work in shifts to keep the mine operational 24 hours a day, seven days a week.

Operations are centred in the Wittingham Coal Measures of the Hunter Coalfield, which is part of a Permian coal basin known as the Sydney basin.

After being washed and prepared for sale, the coal is loaded onto trains for transportation 90 kilometres to the Port Waratah Coal Terminal in Newcastle where it is shipped to international customers.

Warkworth had coal JORC run-of-mine coal reserves totalling 315 million tonnes as at 31 December 2018.


Mount Thorley Warkworth seeks to be more than just a major source of local employment and economic growth, rather to work in partnership with the local community.

Community Consultative Committee

The Mount Thorley Warkworth Community Consultative Committee meets regularly to provide a forum for open discussion between the community, Council and Yancoal representatives. The committee discusses issues directly relating to the mining operation and environmental performance, keeping the community informed on these matters and potential impacts.

Community partnerships

The Coal & Allied Community Development Fund (previously called the Coal & Allied Community Trust) was established in 1999 to support communities in the Hunter Valley to build community capacity, address development challenges and take advantage of emerging opportunities.

Since its inception in 1999, the Coal and Allied Community Development Fund has contributed more than A$14 million to projects aimed at providing benefits for the local community. The Coal & Allied Community Development Fund is continuing its long running contributions to building capacity in the Hunter Valley, with the announcement in late 2014 of a A$3 million commitment for disbursement between January 2015 and December 2017.

More information including the past 12 months of Community Consultative Committee meeting minutes, can be found on the Mount Thorley Warkworth Documents page (click here).