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Australia
Cowal Gold (CGO) Operation (Cowal UG expansion Project) (Cowal UG expansion Project)

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 Location:
37 km NE from West Wyalong, New South Wales, Australia

  Address:
Lake Cowal Road
PO Box 210
West Wyalong
New South Wales, Australia
2671
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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2040
The Cowal operation is a world-class open pit gold operation.

The development of the Underground Mine will enable Cowal’s production to grow to a goal of 350,000 ounces of low-cost gold a year and extend its mine life to 2040. The Underground Mine will provide a higher-grade ore source that will be blended with the current E42 open pit and stockpile ore.

Evolution is in the early stages of developing a proposed extension of the current open pit plan, referred to as the Open Pit Continuation (OPC) Project. The OPC Project will extend the current approved mining operations by two years (from 2040 until 2042).


Owners

Source: p. 17
CompanyInterestOwnership
Evolution Mining Ltd. 100 % Indirect
Evolution Mining (Cowal) Pty Ltd. (operator) 100 % Direct
The Cowal Mine tenement incorporates seven contiguous exploration licences (EL) and two ML covering 1073 km2. All leases are 100% held by Evolution. Evolution operates wholly-owned mine - Cowal in New South Wales.

Contractors

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Deposit Type

  • Mesothermal
  • Vein / narrow vein
  • Epithermal


Summary:

Mining at Cowal currently centres on the E42 deposit, with underground development of the GRE46 deposit underway, and studies ongoing for the E41 and E46 Open Pits. The gold deposits occur within the 40km by 15km wide Lake Cowal Volcanic Complex. The Lake Cowal Volcanic Complex is part of a dismembered ancient volcanic island arc, the Macquarie Arc, that formed around 480Ma, similar to modern day arcs in Indonesia and PNG. The deposits occur within a 5km (n-s) by 2km (e-w) trend known as the Gold Corridor. The gold deposits, E42, E41, E46 and GRE46 are structurally hosted, epithermal to mesothermal gold deposits occurring within and marginal to a >500m thick dioritic to gabbroic intrusion (Muddy Lake Diorite) doming the stratigraphically upright andesitic and dacitic volcaniclastic rocks and lavas. The CGO tenements also host the copper-gold porphyry prospect at Marsden/E43, and the volcanogenic-massive sulphide prospect at Decoy/E35. Gold deposits aligned along a north-south orientated corridor within the bounding Booberoi Fault on the western side and the Reflector Fault on the eastern side. The area is commonly referred to as the Gold Corridor. The current architecture and associated mineralisation within the Gold Corridor is related to a succession of intrusions exploiting pre-existing zones of weakness, most likely the Cowal Shear Zone. The intrusions have domed the camp, resulting in a faulted anti-form that plunges shallowly to the north-northeast. Gold mineralisati ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Cowal operation is currently an open pit mining operation utilising conventional drill and blast, load and haul methodologies, mining nominally 9m benches as 3 x 3m flitches. Mining commenced in 2005 and processing started in 2006. Mining is carried out with a company-owned fleet of mining equipment. Ore is hauled by truck from the pit face to either a stockpile area or directly fed into the primary crusher. Current mining at Cowal open pit is undertaken via conventional truck and excavator fleet, and the current operations demonstrate the appropriateness of this mining method. The 2021 Study used this mining method as the basis of the Ore Reserve estimate for the E42, E41, E46 and GR open pits. Minimum mining widths for benches were based on 45m and are generally exceeded in all pit stages. However, in the E42 Stage I cutback where the cutback stays inside the existing Stage H pit, the mining width reduces to about 30-35m, or the width of the Stage H ramp. To account for operational delays in these narrow areas, operational efficiencies were lowered by reducing the productive hours of excavators by 5% and increasing the loading spot times (truck interchange time at excavator) by 50%. Underground Mining method assessments indicated that sub-level open stoping (SLOS) with pastefill was the most appropriate mining method for the GRE46 underground deposit. This allowed maximum extraction of the economic portion of the deposit, while ensuring no surface subsidence due to ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityUnits2022202120202019201820172016
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required257,951263,015237,940
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as payable metal. ^ Guidance / Forecast.
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Operational Metrics:

Metrics202220212020201920182017
Ore tonnes mined  ......  Subscription required  ......  Subscription required  ......  Subscription required6,114 kt7,770 kt10,203 kt
Waste  ......  Subscription required  ......  Subscription required  ......  Subscription required1,436 kt1,574 kt2,093 kt
Plant annual capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required7.5 Mt
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required7,936 kt7,795 kt7,171 kt
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Reserves at December 31, 2021:
Mineral Resource: Open pit cut-off 0.35 g/t; Underground cut-off 1.50.

Ore Reserve: Open pit cut-off 0.45 g/t; Underground cut-off 1.80.

CategoryTonnage CommodityGradeContained Metal
Proven 23.9 Mt Gold 0.46 g/t 356 koz
Probable 114.1 Mt Gold 1.15 g/t 4,233 koz
Proven & Probable 138 Mt Gold 1.03 g/t 4,589 koz
Measured 24.8 Mt Gold 0.46 g/t 367 koz
Indicated 229.9 Mt Gold 0.99 g/t 7,331 koz
Inferred 50.6 Mt Gold 1.18 g/t 1,920 koz
Total Resource 305.3 Mt Gold 0.98 g/t 9,618 koz

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Credits (by-product) Gold AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -25 / oz   -25 / oz   -20 / oz  
All-in sustaining costs (sold) Gold AUD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 877 / oz†   833 / oz†   776 / oz†  
C1 cash costs Gold AUD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 675 / oz†   613 / oz†   591 / oz†  
C1 cash costs (sold) Gold AUD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 683 / oz†   606 / oz†   604 / oz†  
All-in costs Gold AUD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1,223 / oz†   941 / oz†   789 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
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Financials:

Units2023202220212020201920182017
Capital expenditures (planned) M AUD  ......  Subscription required
Sustaining costs M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 39.7   43.8  
Capital expenditures M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 124.6   27.1  
Revenue M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 422.9   440.7  
EBITDA M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 234.2   258.4  
Operating Cash Flow M AUD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 225.8  
Subscription required - Subscription is required



Heavy Mobile Equipment as of June 30, 2022:
HME TypeModelQuantityLeased or
Contractor
Compactor ....................... Subscription required
Dozer (crawler) ....................... Subscription required ....................... Subscription required
Dozer (rubber tire) ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required Leased
Drill ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Excavator ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required
Loader ....................... Subscription required ....................... Subscription required Leased
Truck (dump) ....................... Subscription required ....................... Subscription required
Truck (dump) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Truck (water) ....................... Subscription required
Truck (water) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Oct 24, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Jun 30, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 24, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 24, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 6, 2022
....................... Subscription required ....................... Subscription required Subscription required Oct 24, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required 2022
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required Subscription required Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
Corporate Presentation 2022
Fact Sheet 2022
Quarterly Report 2022
Year-end Mineral Reserves 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... 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
................................... Subscription required 2019
Annual Report 2018
Corporate Presentation 2018
Fact Sheet 2018
Quarterly Report 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Fact Sheet 2017
Annual Report 2016
Other 2016
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