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Australia
Dartbrook Project (Dartbrook UG)

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 Location:
122 km SE from Newcastle, New South Wales, Australia

  Project Contacts:
Level 15 344 Queen Street
Brisbane
New South Wales, Australia
4000
Phone  ...  Subscription required
Fax+61-7-3229-9323
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Coal (thermal)
Mining Method
  • Truck & Shovel / Loader
Processing
  • Dry Screening
  • Spiral concentrator / separator
  • Wash plant
  • Dense media separation
Mine Life25 years (as of Jan 1, 2018)
March 15, 2022 - Australian Pacific Coal (AQC) has been granted a five-year extension for mining operations at the Dartbrook coal mine.
Latest NewsOperations to restart at Dartbrook as extension denied     August 12, 2019


Owners

Source: p. 5, 66
CompanyInterestOwnership
Australian Pacific Coal Ltd. 100 % Indirect
Australian Pacific Coal Limited completed the acquisition of the Dartbrook coal mine in the Hunter Valley, NSW, on 29 May 2017.
AQC Dartbrook Management Pty Limited is a wholly owned subsidiary of Australian Pacific Coal Limited. AQC Dartbrook Management Pty Limited is the proprietor of the Dartbrook Mine.
February 21, 2022 - Australian Pacific Coal Limited (‘AQC’ or ‘Company’) has received from its major shareholder and creditor Trepang Services Pty Ltd (‘Trepang’), a binding offer for Trepang or its nominee to purchase the Dartbrook Coal Project through acquisition of 100% of the Company’s wholly owned subsidiaries (AQC Investments 2 Pty Ltd; ACQ Dartbrook Pty Ltd; AQC Dartbrook Management Pty Ltd and Dartbrook Coal (Sales) Pty Ltd ‘Subsidiaries’) (the Offer).

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.


Mining Methods

  • Truck & Shovel / Loader


Summary:

AQC’s vision is to develop Dartbrook as a low impact, open cut, mining operation.

The Dartbrook tenements contain a total Coal Resource of approximately 2,534 Million tonnes (588 Mt Measured, 850 Mt Indicated, 1,097 Mt Inferred). Within this Coal Resource, open cut mining is amenable in areas for a total of 1,803 Mt at a depth shallower than 450m.

The OC PFS mine plan mines 226 Mt ROM coal with 190 Mt, or 84%, classified as a ROM Coal Reserve. Based on the modelled processing yield applied by the Competent Person and rounding, this equates to a Marketable Reserve of 140 Mt. This reflects the capacity of the proposed 10 Mtpa pit operating for 25 years, at a strip ratio of 4.0 to 1. Beyond the OC PFS mining pit, the Coal Reserve extends to the south, west and north of the OC PFS mining pit.


Crushing and Grinding


Processing

  • Dry Screening
  • Spiral concentrator / separator
  • Wash plant
  • Dense media separation

Source: Subscription required

Summary:

Coal Handling & Preparation Plant
Dartbrook began operating exclusively with an unwashed (bypass) coal product that was crushed and sold directly to market. The existing Coal Handling & Preparation Plant (CHPP) was established several years later with a combination of washed and bypassed product produced. AQC’s CHPP technical consultant, Ausenco, has assessed the requirements to modify the existing CHPP to process approximately 30% as bypass coal whilst the remainder is washed at a nominal feed rate of 1,000 t/h as received across the wide number of coal types available to the Dartbrook operation.

The Dartbrook CHPP will produce two thermal export coal products with energy specifications of 6100 kCal/kg (GAR) and 5500 kCal/kg (GAR) for the high energy “Dartbrook Premium” and standard energy “Dartbrook Standard” products, respectively. Two-thirds of product coal produced will be Dartbrook Premium coal. The CHPP is a single product plant and will produce each of these pr ........


Projected Production:

CommodityProductUnitsLOM
Coal (thermal) Clean coal Mt 172
Coal (thermal) ROM coal Mt 226

Operational Metrics:

Metrics
Stripping / waste ratio 4 bcm/t *
Raw coal annual capacity 10 Mt *
* According to 2018 study.

Reserves at March 28, 2018:
The Coal Resource have been estimated in accordance with the JORC Code, 2012 Edition. The Dartbrook tenements contain a total Coal Resource of approximately 2,534 Million tonnes (588 Mt Measured, 850 Mt Indicated, 1,097 Mt Inferred). Within this Coal Resource, open cut mining is amenable in areas for a total of 1,803 Mt at a depth shallower than 450m.

The Dartbrook Marketable Coal Reserve of 370Mt is derived from a run of mine Coal Reserve of 470 Mt estimated in accordance with JORC 2012 with a predicted overall yield of 78%. The 370Mt Marketable Coal Reserve is included in the 2.5 Bt Coal Resource (588Mt Measured, 850 Mt Indicated, 1,097Mt Inferred).

CategoryTonnage CommodityMarketable Coal
Probable 470 Mt Coal (thermal) 370 Mt
Measured 507 Mt Coal (thermal)
Indicated 638 Mt Coal (thermal)
Inferred 658 Mt Coal (thermal)
Total Resource 1,803 Mt Coal (thermal)

Commodity Production Costs:

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

Operating Costs:

Units2018
OP mining costs ($/t mined) AUD 30.8 *
Total operating costs ($/t processed) AUD  ......  Subscription required
* According to 2018 study.
Subscription required - Subscription is required.

2018 Study Costs and Valuation Metrics :

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

Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 17, 2021
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2019
Environmental Assessment 2018
Pre-Feasibility Study Report 2018
Subscription required - Subscription is required.

News:

NewsDate
Operations to restart at Dartbrook as extension denied August 12, 2019
AusPac and SNR to form JV at Dartbrook coal mine relaunch August 10, 2018

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