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United States
Fire Creek Mine (Nevada Operation)

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 Location:
63 miles SW from Elko, Nevada, United States

  Regional Office:
6500 North Mineral Drive Suite 200
Coeur d’Alene
Idaho, United States
83815-9408
Phone  ...  Subscription required
Fax208-769-7612
WebsiteWeb
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  • Overview
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  • Fleet
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  • Filings & News

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Overview

StatusCare and Maintenance
Mine TypeUnderground
Commodities
  • Gold
  • Silver
Mining Method
  • Cut & Fill
  • Drift & Fill
  • Back stoping
  • Longhole stoping
  • Cemented backfill
Production Start...
Mine Life2021
Fire Creek was placed on care-and-maintenance in the second quarter of 2021 after processing of the remaining non-refractory ore stockpile.

Fire Creek mine was acquired by Hecla Mining in July 2018. Since that time, mine's production and financial results have been included into the Nevada Operations Segment.


Owners

Source: p. 7,150
CompanyInterestOwnership
Hecla Mining Company 100 % Indirect
Nevada Operations is 100% owned by Hecla Mining Company and was acquired on July 20, 2018 with the purchase of all of the issued and outstanding common shares of Klondex Mines Ltd. Nevada Operations containing operating or previously-operating mines: Fire Creek, Hollister and Midas.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Epithermal
  • Vein / narrow vein


Summary:

The Fire Creek deposit is considered to be a low-sulfidation, epithermal deposit.

Low-sulfidation epithermal systems are also referred to as quartz ± calcite ± adularia ± illite or adularia-sericite epithermal systems. These nomenclatures refer to the oxidation state of the ore fluid sulfur component, gangue mineralogy and hydrothermal fluid pH, respectively. Ore-fluids in a low-sulfidation hydrothermal system are reduced, have a near-neutral pH and are dominated by deeply-circulated meteoric water. These deposits form in the shallow crust, 0.5 to 1.5 miles at temperatures of greater than 300°C in subaerial volcanic settings. Steeply-dipping, open-space veins are common. Quartz is the principal gangue mineral and can be accompanied by chalcedony, adularia, illite, pyrite, calcite, and rhodochrosite. Boiling is the dominant metal deposition mechanism and commonly results in vein textures including crustiform-colloform bands and platy calcite and/or quartz-after-calcite pseudomorphs. Ore metals are usually Au-Ag, Ag-Au or Ag-Pb-Zn and, contrary to the ore-fluid source, metals in NNR-related epithermal deposits are sourced from mantle-derived basaltic magmas (Kamenov et al., 2007).

Zoned hydrothermal alteration comprises widespread and deep propylitization that grades upwards to clay, carbonate and zeolite formation. Proximal alteration comprises quartz, adularia, and pyrite. High-level advanced argillic alteration characterized by clay-carbonate-pyrite or ........


Mining Methods

  • Cut & Fill
  • Drift & Fill
  • Back stoping
  • Longhole stoping
  • Cemented backfill


Summary:

Mining methods include several different techniques such as end slice stoping with delayed backfill, also referred to as longhole stoping, and drift and fill stoping. The final choice of mining method will depend upon the geometry of the stope block, proximity to main access ramps, ventilation and escape routes, the relative strength or weakness of the mineralized material and adjacent wall rock, and finally the value or grade of the mineralized material. The choice of mining method will not be made until after the stope delineation and definition drilling is completed. Each method will be discussed briefly in the following paragraphs.

End Slice Stoping:
End slice, or longhole, stoping has the highest degree of mechanization of the three expected mining methods at the Project, is the lowest cost method and generally provides the lowest total cost per ounce. End slice stoping requires the greatest amount of waste development and can be mined to a minimum width of four feet. The potential for unplanned wall dilution with this method is the greatest.

The amount of mineralization that can be removed prior to backfilling will be constrained by the strength of the gangue material and jointing present immediately adjacent to the stope. Backfill, consisting of either waste rock or cemented rock fill, will be transported from the surface using the same haulage equipment used to remove mineralized material and waste rock from the mine. Where possible, waste ........


Crushing and Grinding


Processing

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Summary:

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Production:
Fire Creek mine was acquired by Hecla Mining in July 2018. Since that time, mine's production and financial results have been included into the Nevada Operations Segment.

CommodityUnits2017201620152014
Gold oz 107,143101,28677,05567,181
Silver oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Equivalent oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics2017201620152014
Ore tonnes mined 123,754 tons119,721 tons87,952 tons
Tonnes milled 134,152 tons120,553 tons86,574 tons54,955 tons
Daily milling rate 330 tons237 tons151 tons

Reserves at December 31, 2021:
Fire Creek Underground mineral resources are reported at a gold equivalent cut-off grade of 0.283 oz/ton.
Open pit resources are calculated at $1,400 for gold and $19.83 for silver and cut-off grade of 0.01 Au Equivalent oz/ton and is inclusive of 10% mining dilution and 5% ore loss.

CategoryOreTypeTonnage CommodityGradeContained Metal
Measured In-Situ (UG) 20 k tons Gold 0.5 oz/ton 10 koz
Measured In-Situ (UG) 20 k tons Silver 0.7 oz/ton 14 koz
Indicated In-Situ (UG) 113 k tons Gold 0.45 oz/ton 51 koz
Indicated In-Situ (UG) 113 k tons Silver 1 oz/ton 114 koz
Measured & Indicated In-Situ (UG) 133 k tons Gold 0.46 oz/ton 61 koz
Measured & Indicated In-Situ (UG) 133 k tons Silver 1 oz/ton 128 koz
Inferred In-Situ (OP) 74,584 k tons Gold 0.03 oz/ton 2,178 koz
Inferred In-Situ (UG) 765 k tons Gold 0.51 oz/ton 392 koz
Inferred In-Situ (OP) 74,584 k tons Silver 0.1 oz/ton 5,232 koz
Inferred In-Situ (UG) 765 k tons Silver 0.5 oz/ton 394 koz

Commodity Production Costs:

CommodityUnits201720162015
Cash costs (sold) Gold Equivalent USD 479 / oz   462 / oz   455 / oz  
Cash costs (sold) Gold USD 445 / oz†  
† Net of By-Product.

Operating Costs:

Units2016
UG mining costs ($/ton mined) USD 301

Financials:

Units20172016
Capital expenditures M USD 26   23.8  
Revenue M USD 141.8   125  
Operating Income M USD 64.1   54.6  



Heavy Mobile Equipment as of September 14, 2018:
HME TypeModelSizeQuantity
Backhoe ....................... Subscription required ....................... Subscription required
Dozer ....................... Subscription required ....................... Subscription required
Drill ....................... Subscription required ....................... Subscription required
Forklift ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required 2 cu. yd ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required 2 cu. yd ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required 2 cu. yd ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required 2 cu. yd ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required 1 cu. yd ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required 4 cu. yd ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required 4 cu. yd ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required 6 cu. yd ....................... Subscription required
Rock bolter ....................... Subscription required ....................... Subscription required
Scissor Lift ....................... Subscription required
Truck (fuel / lube) ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required 30 tons ....................... Subscription required
Truck (haul) ....................... Subscription required 30 tons ....................... Subscription required
Truck (water) ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 21, 2022
....................... Subscription required ....................... Subscription required Subscription required Mar 21, 2022
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2017
Subscription required Subscription required Subscription required 2016
Subscription required 2015

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Form 10-K 2018
Press Release 2018
Press Release 2018
Technical Report 2018
Year-end Mineral Reserves 2018
Form 10-K 2017
Technical Report 2017
Corporate Presentation 2016
Form 10-K 2016
Annual Report 2015
Management Discussion & Analysis 2015
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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