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Australia

Dartbrook OP Project

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Summary

Mine TypeOpen Pit
Study CompletedPrefeasibility
StatusInactive / Suspended
Commodities
  • Coal (thermal)
Mining Method
  • Truck & Shovel / Loader
Mine Life... Lock
SnapshotOn the 28 October 2022, (2022 No649), the NSW Government under the Environment Planning and Assessment Act 1979, implemented a State Environmental Planning Policy (SEPP) Resources and Energy Amendment (Dartbrook Mine) 2022 to prohibit open cut mining on the land, being defined as the Authority 256 boundary.

Control of the Dartbrook mine has effectively shifted away from Australian Pacific Coal since July 2025. Legal and operational authority now rests with the receivers appointed on behalf of Vitol Asia Pte Ltd (“Vitol”), with FTI Consulting acting as the receivers and managers over all secured property of the Dartbrook Joint Venture. Although Australian Pacific Coal Ltd (AQC) remains a nominal joint-venture participant on paper, it no longer holds practical ownership, operational influence, or economic benefit in Dartbrook, and the company itself has adopted the position that its interest in the mine has zero value.
Related AssetDartbrook UG Mine

Owners

SourceSource
CompanyInterestOwnership
Tetra Resources Pty Ltd. 20 % Indirect
The Dartbrook Joint Venture comprises Australian Pacific Coal Limited (80%, via subsidiaries) and Tetra Resources Pty Ltd (20%, via subsidiaries).

Control of the Dartbrook mine has effectively shifted away from Australian Pacific Coal since July 2025. Legal and operational authority now rests with the receivers appointed on behalf of Vitol Asia Pte Ltd (“Vitol”), with FTI Consulting acting as the receivers and managers over all secured property of the Dartbrook Joint Venture.

Financial control is also in Vitol’s hands, as the senior secured creditor: it determines how the asset will be managed, realised, and how proceeds will be distributed. Although Australian Pacific Coal Ltd (AQC) remains a nominal joint-venture participant on paper, it no longer holds practical ownership, operational influence, or economic benefit in Dartbrook, and the company itself has adopted the position that its interest in the mine has zero value.

Deposit type

  • Sedimentary

Summary:

Coal within Dartbrook is located on the western side of the Muswellbrook Anticline. Strata of the Permian Wittingham Coal Measures outcrop in the area and dip gently generally to the west. The location of the igneous intrusions and faults in the Dartbrook deposit is well-known. They have been considered for both resource estimation and mining operations. Based on observations from previous underground operations, the igneous intrusions and faults will have no material impact on the Dartbrook coal product qualities.

Within the Dartbrook Open Cut Pre-Feasibility Study mine schedule there are 13 coal seams amenable to open cut mining.

Reserves

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Mining Methods

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Heavy Mobile Equipment

Fleet data has not been reported.

Comminution

Crushers and Mills

Milling equipment has not been reported.

Processing

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Water usage

Commodity Production

CommodityUnitsLOM
Coal (thermal) Mt 172
All production numbers are expressed as clean coal.

Operational metrics

Metrics
ROM coal, LOM 226 Mt *
Raw coal annual capacity 10 Mt *
Stripping ratio 4 bcm/t *
* According to 2018 study.

Production Costs

CommodityUnitsAverage
Assumed price Coal (thermal) USD 83 / t *  
* According to 2018 study / presentation.

Operating Costs

CurrencyAverage
OP mining costs ($/t mined) AUD  ....  Subscribe
Total operating costs ($/t processed) AUD  ....  Subscribe
* According to 2018 study.

Project Costs

MetricsUnitsLOM Total
Pre-Production capital costs $M AUD  ......  Subscribe
Total CapEx $M AUD  ......  Subscribe
Operating margin, %  ......  Subscribe
After-tax NPV @ 10% $M AUD  ......  Subscribe
After-tax IRR, %  ......  Subscribe
After-tax payback period, years  ......  Subscribe

Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 14, 2025

Workforce

Total WorkforceYear
...... Subscription required 2018

Aerial view:

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