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Canada
Eagle River Complex (Eagle River Mine, Mishi Mine)

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 Location:
49 km NW from Wawa, Ontario, Canada

  Address:
93 Mission Road PO Box 1520
Wawa
Ontario, Canada
P0S 1K0
Phone  ...  Subscription required
Fax(705)856-7173
WebsiteWeb
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  • Overview
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  • Mining
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  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Sub-level stoping
  • Longhole stoping
  • Alimak
  • Cemented backfill
Production Start...
Mine Life2027
Eagle River Gold Mining Complex consists of the Eagle River Mine an underground operating mine with mineral assets, the Mishi Mine an open pit mine presently not in production but with mineral resources, and Eagle River Mill the common processing facilities.


Owners

Source: p. 41
CompanyInterestOwnership
Wesdome Gold Mines Ltd. 100 % Indirect

Contractors

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Deposit Type

  • Mesothermal
  • Vein / narrow vein


Summary:

Both the Eagle River and Mishi deposits are mesothermal lode gold deposits hosted by Archean Greenstone Belts.

The Eagle River deposit has been described as a vein type deposit along a regional deformation zone with discrete brittle-ductile shears localized along lithological contacts (Heather 1986 and 1991).

Gold bearing quartz veins at Eagle River are hosted primarily by subvertical to steeply north dipping east-west striking shear zones within an elliptical quartz diorite stock with dimensions of 2.0 kilometres east-west and 0.5 kilometres north- south.

The quartz diorite stock intrudes a steeply dipping north-facing sequence of thin mafic to intermediate volcanic flows, flow breccias and interflow volcaniclastic rocks.

A number of different ore zones have been distinguished that constitute different segments of the overall shear zone corridor and each has its own gold grade characteristic. Mineable portions of the individual zones form ore shoots that plunge steeply to the east. The bulk of the historic production has come from Zone 8 and Zone 6, which are entirely within the intrusive quartz diorite, while Zone 2 mineralization is hosted in sheared mafic volcanic rocks just east of the stock.

In general, the ore shoots mined to date occur at a spacing of 400 metres along a 2.4 kilometre strikelength. They appear to be spatially related to an array of oblique 110º striking mafic dykes, which pre-date mineralization ........


Mining Methods

  • Truck & Shovel / Loader
  • Sub-level stoping
  • Longhole stoping
  • Alimak
  • Cemented backfill


Summary:

The ERC comprises of two mining operations, the active underground ERM and the open pit Mishi Mine which is not currently in production. Mishi has a small stockpile remaining which will be processed in 2022. With the purchase of the Mill, Wesdome acquired the Magnacon Mine, however has never been active since the acquisition.

Mishi ore feed in 2021 and planned in 2022 is all stockpiled material. The Mishi pit was permitted in 2020 to be a temporary storage reservoir for Mill process water, which is to be seasonally pumped back to the Mill site for treatment and ultimate discharge to the environment. There is currently no planned production or Mineral Reserves associated with the site. There is only an Inferred Mineral Resources.

The ERM was initially mined using a shrinkage mining method before converting to its current mining method of captive sub-level open stoping with access to the sub-level provided by Alimak raises, a variant of longhole mining. The site is currently transitioning to mechanized sub-level open stoping with access to the sub-levels being provided by ramp access.

Currently, ERM utilizes a mix of captive and mechanized access to the sub-levels depending on how close the ramps are. Mechanized access is more productive, but also requires more lateral development with some areas being unable to support mechanized access. Minimum mining widths are 1.5 with 1 m of external dilution expected. The ore body strikes eastwest with str ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

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Production:

CommodityUnits202120202019201820172016
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required71,62558,98047,737
All production numbers are expressed as metal in doré.
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Operational Metrics:

Metrics202120202019201820172016
Tonnes milled  ......  Subscription required  ......  Subscription required168,809 t255,804 t309,841 t309,035 t
Daily milling rate  ......  Subscription required  ......  Subscription required462 t619 t850 t844 t
Daily milling capacity  ......  Subscription required  ......  Subscription required1,200 t1,200 t1,200 t1,200 t
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Reserves at December 31, 2021:
Mineral Reserves are reported above a 5.5 g/t Au cut-off.
Resources are reported using a 4.22 g/t Au cut-off grade.
Open Pit Resources are reported using an in-situ marginal cut-off grade of 0.52 g/t.

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven In-Situ (UG) 116 kt Gold 11.3 g/t 42 koz
Probable In-Situ (UG) 951 kt Gold 15.8 g/t 481 koz
Proven & Probable In-Situ (UG) 1,066 kt Gold 15.3 g/t 524 koz
Measured In-Situ (UG) 126,300 t Gold 13.38 g/t 54,300 oz
Indicated In-Situ (UG) 338,700 t Gold 9.06 g/t 98,600 oz
Measured & Indicated In-Situ (UG) 464,900 t Gold 10.23 g/t 152,900 oz
Inferred In-Situ (OP) 2.3 Mt Gold 1.61 g/t 120 koz
Inferred In-Situ (UG) 596,100 t Gold 13.32 g/t 255,300 oz

Commodity Production Costs:

CommodityUnits202120202019201820172016
Cash costs Gold USD 901 / oz  
Cash costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 699 / oz†   845 / oz†   899 / oz†  
All-in sustaining costs (AISC) Gold USD 1,289 / oz  
All-in sustaining costs (sold) Gold USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 985 / oz†   1,146 / oz†   1,279 / oz†  
† Net of By-Product.
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Operating Costs:

Units2021202020192018201720162015
Total operating costs ($/t milled) CAD 357389424250204184184

Financials:

Units202120202019201820172016
Sustaining costs M CAD  ......  Subscription required  ......  Subscription required  ......  Subscription required 17.2   15   16.4  
Capital expenditures M CAD  ......  Subscription required  ......  Subscription required  ......  Subscription required 18.2   15   18.2  
Revenue M CAD  ......  Subscription required  ......  Subscription required  ......  Subscription required 116   94.9   81.6  
Gross profit M CAD  ......  Subscription required
Operating Income M CAD  ......  Subscription required  ......  Subscription required 52.1   31.5   26  
Pre-tax Income M CAD  ......  Subscription required
After-tax Income M CAD  ......  Subscription required  ......  Subscription required 14.9   1.3   7.8  
Operating Cash Flow M CAD  ......  Subscription required  ......  Subscription required 46.3   27.2   22.4  
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 17, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 17, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 17, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 17, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 17, 2022
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Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
................................... 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
Corporate Presentation 2018
Management Discussion & Analysis 2018
Management Discussion & Analysis 2017
Management Discussion & Analysis 2016
Press Release 2016
Technical Report 2016
Management Discussion & Analysis 2015
Pre-Feasibility Study Report 2011
Technical Report 2010
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