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United States
Bald Mountain Mine

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 Location:
100 km NW from Ely, Nevada, United States

  Address:
P.O. Box 2706 State Route 892
Ely
Nevada, United States
89803
Phone775-237-5811
Fax775-237-5818
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
Processing
  • ROM/dump leach
  • Carbon in column (CIC)
  • Carbon adsorption-desorption-recovery (ADR)
  • Cyanide (reagent)
Mine Life2023
The largest mine site by area in the U.S.


Owners & OPERATOR

Source: p. 61
CompanyInterestOwnership
Kinross Gold Corp. 100 % Indirect
KG Mining (Bald Mountain) Inc. (operator) 100 % Direct
The Bald Mountain mine is owned and operated by Kinross’ wholly-owned subsidiary KG Mining (Bald Mountain) Inc. (“KGBMI”).

Deposit Type

  • Sediment-hosted

Source: Source p.63

Summary:

Placer gold (with minor copper, silver, and antimony) was initially mined in the Bald Mountain area from the 1870s to 1890s. Modern exploration for bulk disseminated gold deposits commenced in the late1970s. Since 1977, gold exploration has mainly focused on defining the outcropping, oxide gold deposits.


Mining Methods

  • Truck & Shovel / Loader

Source: p.64

Summary:

The Bald Mountain operation is an open pit mining operation with production from a number of different pits. The three main deposits are represent more than 77% of the known reserves. Bald Mountain includes several deposits scattered over the property, and two run of mine (“ROM”) leach pads (Bald Mountain and Mooney).


Crushing and Grinding
Source: Source p.2-3


Processing

  • ROM/dump leach
  • Carbon in column (CIC)
  • Carbon adsorption-desorption-recovery (ADR)
  • Cyanide (reagent)

Source: Source p.2-3

Summary:

Bald Mountain recovers gold using multiple ROM heap leach pads. Gold is extracted from the ore with a cyanide solution and collected on activated carbon in CIC plants. Loaded carbon is shipped off-site for further processing and ultimate gold refining. The mining recovery is high because the ore blocks are large compared to the selective mining unit, and close to all of the material outlined as ore in the grade control process is mined. Selectivity of the ore mining is minimal due to the low cut-off grade and the fact that the grade control outlines large blocks of ore-grade material for mining. Whenever possible, ore blocks are oriented square to the dig direction – minimizing ore loss and dilution.

The process operations are divided between two separately permitted operations; the Bald Mountain Mine Area located on the western portion of the mine property and the Mooney Basin Area located on the eastern portion of the property.

The Bald Mountain Mine Area includes:
• Process Area #1 which is no longer in operation. This consisted of a leach, five process ponds and a process building. The facilities have been decommissioned and the ponds backfilled. The area is currently under reclamation.
• Process Area #2 includes leach pads (Bald Leach Pad (previously pads 2 through 4) and Leach Pad 5), Settling Pond (PS1), Overflow Pond (POF1) and Secondary Pond (P4), two pregnant solution ponds (P5 and P6), Barren Pond (P7), Carbon-in-Column (CIC) process plant and cyanide offloading facility. The process plant used to have a carbon stripping, carbon regeneration and gold refining facilities, but these were decommissioned in 2012.

The Mooney Basin Area includes three process areas:
• North Area Facility, comprising a leach pad (Original Pad and Expansion Pads I, II, and III), two process solution ponds, a storm/event pond, Carbon in-Column (CIC) process plant and cyanide off-loading facility;
• South Area Facility, comprising Leach Pad 4, a process solution pond, a storm/event pond, a solution collection tank, CIC plant and cyanide off loading facility.
• Deep South Area Facility, comprising Leach Pad 5, a process solution pond, one storm/event pond, and a solution collection tank. Pregnant solution from this facility is piped to the South Area CIC plant for processing.

Recoveries & Grades:

CommodityParameter2019201820172016
Gold Equivalent Head Grade, g/t 0.420.430.80.64

Production:

CommodityUnits201920182017201620152014
Gold Equivalent oz 187,961284,646282,715130,144
Gold koz 191161

Operational Metrics:

Metrics2019201820172016
Ore tonnes mined 15,806 kt24,477 kt21,615 kt10,656 kt
Tonnes processed 16,475 kt23,654 kt21,615 kt10,656 kt
Stripping / waste ratio 2.8
Daily mining capacity 260 kt

Reserves at December 31, 2019:

CategoryTonnage CommodityGradeContained Metal
Probable 63,999 kt Gold 0.6 g/t 1,277 koz
Measured 8,556 kt Gold 0.8 g/t 232 koz
Indicated 189,548 kt Gold 0.6 g/t 3,630 koz
Measured & Indicated 198,104 kt Gold 0.6 g/t 3,862 koz
Inferred 47,936 kt Gold 0.5 g/t 808 koz

Commodity Production Costs:

CommodityUnits2019201820172016201520142013
Cash costs (sold) Gold Equivalent USD 768 / oz 547 / oz 642 / oz 1,182 / oz
Cash costs Gold USD 723 / oz 628 / oz 724 / oz 894 / oz
All-in sustaining costs (AISC) Gold USD 1,692 / oz 1,132 / oz 1,070 / oz 2,182 / oz

Financials:

Units2019201820172016
Capital expenditures M USD 220.7  149.9  90.5  40.5  
Revenue M USD 249.2  403.9  331.5  139.6  
Operating Income M USD 12.7  110.7  68.5  -37.4  
Gross profit M USD 33.1  130.1  79.1  -30.7  


Heavy Mobile Equipment as of June 29, 2016:
Source: Source p.9
HME TypeModelQuantity
Shovel P&H 2800 XPC 2
Shovel Hitachi EX 5500 1
Shovel Hitachi EX5600 1
Shovel Hitachi EX3600 1
Truck (haul) Komatsu 830E-AC 23
Truck (haul) Caterpillar 785 9
Truck (haul) Komatsu 830E D/C 5

Mine Management:

Job TitleNameProfileRef. Date
Chief Geologist Michael Olson LinkedIn Sep 29, 2020
Maintenance Manager Dale Thompson LinkedIn Sep 29, 2020
Mobile Equipment Maintenance Manager Jeremy Pennington LinkedIn Sep 29, 2020
Operations Manager Clint Nebeker LinkedIn Sep 29, 2020
Process Superintendent Mark Wilson LinkedIn Sep 29, 2020
Safety Superintendent James Hoover LinkedIn Sep 29, 2020
Sr. Production Geologist Eric Herth LinkedIn Sep 29, 2020

Staff:

EmployeesYear
500 2016

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2020
Press Release 2020
Annual Information Form 2019
Financial Review 2019
Management Discussion & Analysis 2019
Press Release 2019
Year-end Mineral Reserves 2019
Annual Information Form 2018
Financial Review 2018
Management Discussion & Analysis 2018
Press Release 2018
Year-end Mineral Reserves 2018
Annual Information Form 2017
Financial Review 2017
Management Discussion & Analysis 2017
Other 2017
Year-end Mineral Reserves 2017
Annual Information Form 2016
Annual Report 2016
Annual Report 2016
Corporate Presentation 2016
Management Discussion & Analysis 2016
Annual Report 2015
Press Release 2015
Year-end Mineral Reserves 2015
Annual Report 2014
Other 2009

Aerial view:

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