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Australia
Millennium and Mavis Downs Mine

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 Location:
139 km SW from Mackay, Queensland, Australia

  Address:
Level 15, 133 Mary Street
Brisbane
Queensland, Australia
4000
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Coal (metallurgical)
Mining Method
  • Truck & Shovel / Loader
  • Auger
  • Backfill
Production Start...
Peabody Energy Corp. Millennium and Mavis Downs Mine ceased production in March 2020.

On April 15, 2021, MetRes Pty Ltd, a 50/50 joint venture (JV) between Stanmore Coal and M Resources, acquired the Millennium and Mavis Downs coal mine in Queensland from Peabody Energy.

On October 7, 2021 - Millennium and Mavis Downs Mine has officially reopened.

On August 30, 2021, PIMS Group was recently awarded a five-year contract to convert the idled open-pit Millennium and Mavis Downs coal mines, west of Mackay, Queensland, to underground operations, which could ultimately result in an estimated 1.2 Mt/y of incremental coal extraction.


Owners

Source: p. 1,3
CompanyInterestOwnership
Golden Energy and Resources Ltd. (GEAR) 30 % Indirect
M Resources Pty Ltd. (operator) 50 % Indirect
April 15, 2021 - MetRes Pty Ltd, a 50/50 joint venture (JV) between Stanmore Coal and M Resources, has acquired the Millennium and Mavis Downs coal mine in Queensland from Peabody Energy. M Resources to appoint a wholly owned subsidiary, M Mining Pty Ltd as the Joint Venture Manager and operator of the proposed mining activities.

GEAR’s effective interest in Stanmore is 60% through its approximately 80% shareholding in its subsidiary Golden Investments (Australia) Pte. Ltd. which holds 75.33% in Stanmore.

Contractors

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Deposit Type

  • Sedimentary


Summary:

The Millennium project area lies within the Permo-Triassic Bowen Basin. The Bowen Basin consists of 10 kilometre (km) thick sequences of volcanic, shallow marine and terrestrial sediments and is categorised back-arc to foreland basin.

Coal seams occur within the Rangal Coal Measures which are Late Permian in age. These seams dip to the west at approximately 4 - 7 degrees within the Millennium Lease and 4 – 10 degrees to the east at Mavis Downs.

The coal seams of interest found within the Project area are as follows – Leichhardt and Vermont Upper 1. Additional seams were intersected in the historic drilling and in part analysed these were the M seam and plies of the Vermont Lower Seams.

The target seams have a cumulative thickness of approximately 7 m across the deposit.


Mining Methods

  • Truck & Shovel / Loader
  • Auger
  • Backfill


Summary:

• Open cut mining method is planned to be conventional strip mining where the floor dip is suitable, and terrace mining where the floor dip is steeper. Waste will be drilled and blasted before being removed by bench using one large 600 t and one 350 t hydraulic excavators and rear dump trucks. The mined waste will be backfilled in the voids behind the active mining operations. No ex-pit dump needed to be created within the mining schedule.

• Open cut coal is planned to be mined by one 350 t hydraulic excavators and hauled by suitable matched rear dump trucks to a ROM stockpile pad before being processed by a coal handling and processing plant.

• Augers will be deployed for mining Leichhardt seams in Mavis Downs and both Leichhardt and Vermont seams in Millennium in area where it has not been mined by highwall miners previously.


Crushing and Grinding


Processing

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Summary:

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Production:
The Company’s Millennium Mine ceased production in March 2020, with sales continuing throughout May 2020.

CommodityUnits20202019201820172016
Coal (metallurgical) M tons  ......  Subscription required  ......  Subscription required1.93.33.5
Heat ContentBTU/lb12,60012,60012,60012,600
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Reserves at October 31, 2020:
50% in-situ ash adb basis cut-off was applied to coal seams in the Resource model used for this estimate.

CategoryOreTypeTonnage CommodityMarketable Coal
Proven In-Situ (OP) 1.47 Mt Coal (metallurgical)
Proven In-Situ (UG) 1.29 Mt Coal (metallurgical)
Probable In-Situ (OP) 0.72 Mt Coal (metallurgical)
Probable In-Situ (UG) 4.13 Mt Coal (metallurgical)
Proven & Probable In-Situ (OP) 2.19 Mt Coal (metallurgical)
Proven & Probable In-Situ (UG) 5.43 Mt Coal (metallurgical) 4.56 Mt
Measured Total 13 Mt Coal (metallurgical)
Indicated Total 17 Mt Coal (metallurgical)
Inferred Total 7 Mt Coal (metallurgical)
Total Resource Total 37 Mt Coal (metallurgical)



Heavy Mobile Equipment:
HME TypeModelSizeQuantityStatusLeased or
Contractor
Ref. Date
Continuous Miner ....................... Subscription required ....................... Subscription required Proposed Leased Dec 3, 2021
Excavator 600 t ....................... Subscription required Existing Leased Apr 15, 2021
Excavator 350 t ....................... Subscription required Existing Leased Apr 15, 2021
....................... Subscription required ....................... Subscription required ....................... Subscription required Proposed Leased Dec 3, 2021
Truck (dump) Existing Leased Apr 15, 2021
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneProfileRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Aug 10, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 10, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021
Subscription required 2019
Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Fact Sheet 2018
Form 10-K 2018
Project Description 2018
Annual Report 2017
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