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Minesites Directory

Browse minesites. Each card shows company ownership and their most recent associated articles.

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Page 48 of 147 (3508 total)
Coal Valley Mine

Alberta, Canada · Open Pit

Operating
Coal
Opened
1978-01-01
End year
2020
Workforce
The reopening in 2021 was expected to restore 300 direct jobs and up to 750 indirect jobs. An earlier record mentioned 438 employees.
Overview
The Coal Valley Mine is a surface mine located in West Central Alberta, south of the Town of Edson. Mining is conducted using truck and shovel/loader and dragline methods. The mine was placed on care and maintenance in June 2020 due to the COVID-19 pandemic and restarted production in the fourth quarter of 2021.
Production
coal: 2.3 Mt
Processing
The mine includes a coal wash plant to process the run-of-mine coal. The process involves crushing, breaking, and sizing the coal before it undergoes density separation to clean the organic material from refuse. The plant has the capacity to wash 4 million tonnes of clean coal per year.
Equipment
The mine utilises truck/shovel and dragline equipment.
Expansion
Prairie Mines and Royalty applied to extend the Pit 26 site by 68 hectares. This expansion falls within the current Coal Valley Mine boundaries.
Companies & ownership
  • Westmoreland Mining LLC
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San Juan Mine

New Mexico, United States · Open Pit

Closed
Coal
Opened
1973-01-01
End year
2022
Workforce
51 employees will be retained for the reclamation process.
Overview
The San Juan Mine ceased active coal production in September 2022 and is now in a state of reclamation. The mine, which began as a surface operation in 1973, later included underground mining.
Production
coal: 1572266 t
Companies & ownership
  • Westmoreland Mining LLC
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Rosebud Mine

Montana, United States · Open Pit

Operating
Coal
Opened
1968-01-01
End year
2045
Workforce
Over 300
Production
coal: 5978039 t
Processing
Coal is transported via a conveyor belt system to crushers. High-sulfur "waste coal" is sent by truck to the Rosebud Power Plant for combustion.
Equipment
Mining methods include dragline and truck and shovel/loader. Equipment includes Marion 8050 and Marion 8200 draglines and a 4.2-mile long overland conveyor belt.
Expansion
In August 2025, the U.S. Department of the Interior approved a mining plan modification for the Rosebud Mine, located in Rosebud and Treasure counties. This decision allows for the extraction of approximately 33.75 million tons of federal coal and extends the mine's operation. The expansion covers nearly 1,900 acres of new mining area. The mine has several active permit areas, including Area A, Area B, Area C, and Area F. As of December 2023, 582 acres had been disturbed in the Area F project area, with 8.5 million tons of coal produced from this area. An application for a fifth amendment (AM5) to the operating permit for Area B would increase the permit area by 9,108 acres to a total of 15,153 acres and allow for the extraction of an additional 42.9 million tons of coal.
Companies & ownership
  • Westmoreland Mining LLC
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Kemmerer Mine

Wyoming, United States · Open Pit

Operating
Coal
Opened
1960-01-01
End year
2025
Workforce
2025: 215 workers (before March layoffs). 2024: 215 workers. 2023: 230 employees. 2019: 272 employees. 2017: 279 workers.
Overview
The mine is a 13,400-acre surface mine complex. Sub-bituminous coal for electrical generation and industrial uses. The coal is sourced from the Adaville and Frontier formations.
Production
coal: 2.4 Mt
Processing
Coal is supplied to the adjacent Naughton Power Station via a 4,200 ft long overland conveyor. In 2015, the mine upgraded a drive system on an inclined conveyor.
Equipment
4,200 ft long overland conveyor, inclined conveyor
Expansion
A $30 million project to relocate a section of U.S. Highway 30 to access an additional 9 million tons of coal reserves was halted in September 2024. In April 2025, Kemmerer Operations LLC requested a permit modification to expand the capacity of three coal stockpiles.
Companies & ownership
  • Westmoreland Mining LLC
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Jewett Mine

Texas, United States · Open Pit

Closed
Coal
Opened
1985-01-01
End year
2016
Workforce
approximately 250 jobs cut upon closure in late 2016 and early 2017
Overview
Mining operations at the Jewett Mine ceased permanently at the end of 2016 due to the adjacent Limestone Electric Generating Station terminating its lignite supply contract. The mine is now in a reclamation-only status, with activities expected to be completed by 2028. NRG is responsible for the reclamation of the 35,000-acre site.
Production
coal: 6.3 Mt
Equipment
large draglines, including three Marion 8200 models and a Marion 8750, supported by a bucketwheel excavator and standard earth-moving equipment such as front-end loaders, hydraulic excavators, haulers, and dozers
Companies & ownership
  • Westmoreland Mining LLC
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Beulah Mine

North Dakota, United States · Open Pit

Closed
Coal
End year
2022
Overview
The Beulah Mine is a surface lignite mine located in Mercer County, North Dakota. Coal production concluded in early 2022 due to the retirement of the Heskett Station power plant. Reclamation of the mined land is expected to continue until 2026. The former mine site is being redeveloped by Talon Metals Corp. for a nickel and copper processing facility.
Production
coal: 0.8 Mt
Companies & ownership
  • Westmoreland Mining LLC
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Absaloka Mine

Montana, United States · Open Pit

Care And Maintenance
Coal
Opened
1974-01-01
End year
2028
Workforce
108 (as of April 2024)
Overview
The Absaloka Mine ceased production in April 2024 and is now under care and maintenance. This action followed the shipment of its final coal railcar on 3 April 2024, after its primary customer, the Sherburne County Generating Station (SHERCO), phased out its coal-fired units. The operator, Westmoreland Absaloka Mining LLC, a subsidiary of Westmoreland Mining LLC, has stated that a permanent closure is not imminent, and heavy equipment remains idle at the site. The mine is located in Big Horn County, Montana, approximately 30 miles east of Hardin.
Production
coal: 2229591 t
Equipment
dragline and truck and shovel/loader operations, heavy equipment
Companies & ownership
  • Westmoreland Mining LLC
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Snip Gold Project

British Columbia, Canada · Underground

Under Development
Gold
Overview
The Snip Gold Project, fully owned by Skeena Resources Limited since April 2023, is in British Columbia, Canada. An updated Mineral Resource Estimate (MRE) in September 2023 significantly increased indicated resources, solidifying its potential as a future satellite operation to the nearby Eskay Creek Project.
Production
gold: 823000 oz
Processing
Skeena plans to investigate the potential of processing ore from the Snip project at the Eskay Creek mill. Metallurgical recovery has been updated to 96%.
Expansion
A detailed engineering study with project economics was anticipated in the first half of 2024. Skeena plans to investigate processing ore from the Snip project at the Eskay Creek mill.
Companies & ownership
  • Skeena Resources Limited
    TSX:SKE · NYSE:SKE
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Eskay Creek Gold-Silver Project

British Columbia, Canada · Open Pit

Under Development
GoldSilver
Mine life
12 years
Workforce
Once operational, the Eskay Creek Revitalization Project is expected to create over 800 direct jobs. In 2023, Skeena reported that its workforce was 12% Indigenous.
Overview
The Eskay Creek Gold-Silver Project, wholly owned and operated by Skeena Resources Limited, is a past-producing mine being redeveloped as a conventional truck and shovel open-pit operation. The project is fully permitted and advanced to the construction phase, with initial production and cash flow anticipated in the second quarter of 2027. The project received its Environmental Assessment Certificate in January 2026, a major milestone reached in partnership with the Tahltan Nation. The total pre-production capital cost is estimated at C$713 million.
Production
First 5 years of operation: Average annual production of 455,000 ounces of gold. First 10 years of operation: Average annual production of 370,000 ounces of gold. Average annual production (life of mine): Between 0.20 and 0.25 million ounces of gold and between 5.5 and 7.0 million ounces of silver.
Processing
The processing plant will have an initial throughput capacity of 3 million tonnes per year. The process involves grinding the ore, followed by a flotation circuit to produce a combined gold-silver concentrate. This concentrate will then be transported to third-party smelters.
Equipment
four Leopard DI650i down-the-hole (DTH) drill rigs from Sandvik
Companies & ownership
  • Skeena Resources Limited
    TSX:SKE · NYSE:SKE
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Bogoso-Prestea

Western Region, Ghana · Open Pit

Operating
Gold
Workforce
over 1,400 people
Overview
The Bogoso-Prestea mine, acquired by Heath Goldfields Ltd. in late 2024, resumed gold production in February 2026 after a 24-month shutdown. Rehabilitation of the flooded underground mine and processing plant is ongoing.
Production
Heath Goldfields has outlined a five-year development plan with a target of producing 285,000 ounces of gold annually in the first phase.
Processing
The mine has historically fed both refractory and oxide processing plants. Ore from the Prestea underground mine is planned to be processed at the Bogoso processing plant.
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
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Back River Gold District

Nunavut, Canada · Open Pit

Under Development
GoldSilver
End year
2034
Mine life
9 years
Workforce
1,100 employees, with 200 being Inuit
Production
Expected to produce between 170,000 and 230,000 ounces of gold in 2026. Gold production is anticipated to exceed 300,000 ounces per year starting in 2027. The average annual gold production over the first six years is estimated at 300,000 ounces.
Processing
The processing plant uses conventional crushing, grinding, gravity concentration, pre-oxidation, gold leaching by cyanidation, and a carbon-in-pulp (CIP) circuit to produce gold doré bars. The plant has a throughput capacity of 4,000 tonnes per day, with potential expansion to 6,000 tpd.
Equipment
The mine utilizes a fleet of heavy equipment for its open-pit and underground operations, including haul trucks, dozers, excavators, graders, and loaders. For underground development, jumbo drills are used.
Expansion
B2Gold is evaluating an expansion of the mill throughput from 4,000 to 6,000 tonnes per day. The company is also conducting exploration drilling to target extensions of the Llama and Umwelt deposits. A study is underway to assess the installation of a semi-autogenous grinding (SAG) mill to potentially increase throughput. The company is also considering a flotation/concentrate leach process to potentially increase gold recovery and reduce operating costs.
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
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Xavantina

Mato Grosso, Brazil · Underground

Under Development
Gold
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
View on map
Wonder

Nevada, United States · Open Pit

Under Development
Gold
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
View on map
Williams

Ontario, Canada · Underground

Operating
Gold
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
View on map
Wharf

South Dakota, United States · Open Pit

Operating
Gold
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
View on map
Wembley Durack

Western Australia, Australia · Open Pit

Under Development
Gold
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
View on map
Wassa

Western Region, Ghana · Underground

Operating
Gold
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
View on map
Voisey's Bay

Newfoundland & Labrador, Canada · Open Pit

Operating
NickelCopperCobalt
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
View on map
Ulysses

Western Australia, Australia · Open Pit

Operating
Gold
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
View on map
Twin Creeks

Nevada, United States · Open Pit

Operating
Gold
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
View on map
Southern Cross

Western Australia, Australia · Open Pit

Operating
Gold
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
View on map
South Laverton

Western Australia, Australia · Underground

Operating
Gold
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
View on map
Skyline

Nevada, United States · Underground

Operating
Gold
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
View on map
Ruby Hill

Nevada, United States · Underground

Under Development
GoldSilverLeadZinc
Companies & ownership
  • Royal Gold, Inc.
    NYSE:RGLD
View on map
Page 48 of 147 (3508 total)