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During the construction phase, approximately 100 people were required, and once in production, the steady-state operations were expected to employ 450 people.

Ore from the Pedra Branca underground mine is transported approximately 75km to the Antas North processing plant. The plant has a capacity of 800 ktpa, and tailings are deposited in the exhausted Antas North open pit.

OZ Minerals commenced mine construction in 2019, with the first development ore targeted for mid-2020 and ramp-up to full production in 2022. BHP acquired OZ Minerals in May 2023. On 15 August 2025, BHP entered into a binding agreement to sell its Carajás assets, including Pedra Branca, to a wholly-owned subsidiary of CoreX Holding. This transaction was completed on 2 April 2026. The new operating company is named CoreX Copper Brasil.

Prior to the suspension announcement, the construction workforce was reduced from approximately 400 to 300 people in March 2024. Following the decision to suspend the entire Western Australia Nickel operations, it was announced that the 1,600 frontline employees would be offered redeployment within BHP or redundancies.

The mine was expected to produce an average of approximately 35,000 tonnes of nickel and 41,000 tonnes of copper annually during the first five years of operation.

Production overview - 2022: nickel 720000 t, copper 790000 t.

The project plans to use a mineral processing plant with a capacity of 10-12 million tonnes per annum (Mtpa). The processing method involves a grinding circuit with two stages of crushing followed by two parallel vertical roller mills and a bulk flotation circuit to produce separate copper and nickel concentrates. Key equipment suppliers include Metso Outotec for the cone crusher and flotation units. GR Engineering was contracted for the design and construction of the processing plant.

The West Musgrave Project, along with BHP's other Nickel West operations, will be temporarily suspended from October 2024. BHP plans to review this decision by February 2027. The suspension is due to an oversupply in the global nickel market. Project construction was at 30 per cent completion when the suspension was announced.

Production overview - 2022: copper 55547 t, gold 124843 oz.

conventional crushing, grinding and flotation

truck haulage, deep shaft ore hoisting system, Wira Shaft

The Prominent Hill Operations Expansion (PHOX) project is a significant underground expansion to transition the mine from truck haulage to a deep shaft ore hoisting system. This project includes the construction of the Wira Shaft, a vertical shaft which was completed in the fourth quarter of fiscal year 2025. The new hoisting system is expected to come online in the second half of fiscal year 2027 and is designed to extend the mine's life to at least 2040. The project involves an investment of US$0.9 billion.

approximately 700 (as of June 2024)

The Carrapateena mine produces copper concentrate containing gold and silver. A major development is the transition from the current sub-level caving mining method to a block cave for the lower half of the orebody, aiming to make the mine a multi-generational, low-cost operation.

Production overview - 2023: copper 11700 kt, gold 15304 oz, silver 157000 koz.

Ore is processed on-site through conventional crushing, grinding, and flotation methods to produce concentrate. The processing plant includes a semi-autogenous grinding (SAG) mill and a ball mill. A second crusher (Crusher 2) was commissioned in the third quarter of FY2024 to enhance productivity from the sub-level cave. There are also plans for the commissioning of a HydroFloat coarse particle flotation (CPF) plant.

semi-autogenous grinding (SAG) mill, ball mill, second crusher (Crusher 2), HydroFloat coarse particle flotation (CPF) plant

The Carrapateena Expansion Project is focused on developing the lower half of the orebody into a block cave. This expansion is expected to unlock the mine's potential to be a long-life, low-cost operation. The development of the decline for the block cave was ongoing in FY2024. A major development is the transition from the current sub-level caving mining method to a block cave for the lower half of the orebody. This expansion aims to make the mine a multi-generational, low-cost operation.

approximately 7,000 people

Nevada Gold Mines is a joint venture that commenced operations on 1 July 2019, combining the assets of Barrick Gold and Newmont in northern Nevada. The complex is the single largest gold-producing complex in the world and includes multiple mines and processing facilities. The primary assets are the Carlin, Cortez, Turquoise Ridge, Phoenix, and Long Canyon operations. The Long Canyon mine was placed on care and maintenance at the end of 2023.

Production overview - 2023: gold 1170000 oz, silver 952702 oz, copper 35406713 lbs; 2022: gold 1169000 oz.

The Nevada Gold Mines complex features a wide array of processing facilities tailored to different ore types. These include: Carlin Complex: Gold Quarry Roaster, Goldstrike Autoclave, and Goldstrike Roaster. Recent investments have included the expansion of the Gold Quarry roaster, which increased its throughput by 20%, and process improvements at the Goldstrike roaster. Cortez Complex: An oxide mill and multiple heap leach pads. Turquoise Ridge Complex: The Sage Autoclave and a carbon-in-leach (CIL) plant. Significant upgrades have been made to the Sage autoclave to improve its reliability and performance. Phoenix Complex: A flotation mill, a copper leach pad, and a solvent extraction-electrowinning (SX/EW) plant.

The open pit operations are undergoing a significant fleet upgrade with the acquisition of 63 new Komatsu 930E-5 haul trucks. This is part of a broader initiative to recapitalise the operations for the next 10-15 years. The underground mines utilise a range of standard equipment, including load-haul-dump vehicles, haul trucks, and drilling equipment.

The Goldrush project is a key component of Nevada Gold Mines' growth strategy. The project received its Record of Decision in late 2023, with a total anticipated capital expenditure of approximately $1 billion on a 100% basis. Production from Goldrush is expected to ramp up, reaching approximately 130,000 ounces in 2024 and growing to around 400,000 ounces per year by 2028 (100% basis). The development of Goldrush is expected to create approximately 500 construction jobs and 570 new operational jobs. Another significant development is the Barrick-owned Fourmile project, which has the potential to be contributed to the Nevada Gold Mines joint venture if certain conditions are met. Exploration efforts are ongoing across the complex to identify further growth opportunities.

3173 (including contractors) as of fiscal year 2025.

Production overview - 2025: gold 20.930000000000003 t; 2024: gold 686000 oz.

The metallurgical plant includes a twin-circuit sulphide and oxide plant with conventional carbon-in-leach, gravity recovery, a flotation circuit, and an ultra-fine grind circuit.

Drilling results from the ARK-KCD corridor have shown the potential for significant additional orebodies that could extend the mine's life.

The Monte Cristo project is situated in Esmeralda County, Nevada, USA. It is part of Hecla Mining Company's Nevada portfolio, which is a high-impact development project. The project is in the exploration stage, with ongoing detailed mapping, geochemistry, and cross-section generation to advance targets to a drill-ready status.

Production overview - 2025: gold 687000 oz, silver 8466000 oz.

Hecla Canada, the operator of Keno Hill, has 277 employees.

Production overview - 2025: silver 3018490 oz; 2024: silver 2773873 oz.

The mine has a fully permitted 400 tonne per day mill. In 2025, upgraded underground water management infrastructure was commissioned, and the water treatment plant was upgraded with automated systems. A backfill plant was also completed and was being commissioned in early 2026.

The initial new underground mining fleet in 2020 included two Caterpillar R1300 LHDs, two Cat AD22 haul trucks, two Epiroc 282 twin boom jumbos, and two MacLean SSB bolters.

Hecla is focused on advancing permits and infrastructure projects to ramp up toward the current permitted capacity. Exploration is ongoing, with a focus on areas like the Deep Bermingham ore body.

7500 (construction); 4000 (operation)

Production overview - 2025: copper 7300000 t, gold 404.35 t.

The project will be a truck-and-shovel open pit operation with processing facilities to produce a high-quality copper-gold concentrate. Construction is planned in two phases. Phase 1 is expected to have a processing capacity of 45 million tonnes per annum, expanding to a combined 90 million tonnes per annum in Phase 2.

Key suppliers for processing and mining equipment include Metso, Weir, and Komatsu.

The reconstitution of the Reko Diq project was completed in December 2022. An updated feasibility study has been completed and approved by the joint venture shareholders. The Environmental and Social Impact Assessment (ESIA) was approved by government authorities in early 2025. Fluor has been selected as the lead engineering, procurement, and construction management (EPCM) partner. The total estimated capital cost for Phase 1 is between $5.6 billion and $6.0 billion, with Phase 2 estimated between $3.3 billion and $3.6 billion. In early 2026, Barrick announced it was slowing development activity and extending the project review until mid-2027 due to escalating security risks in the region. This may lead to significant increases in the estimated capital budget and timeline. The previously targeted first production by the end of 2028 is now under review. The project is expected to create approximately 7,500 jobs during peak construction and 4,000 long-term positions once operational.

The workforce at Veladero is approximately 3,800 people, with some records indicating 4,162 including contractors as of late 2022. Around 91% of the labour force is sourced from the local San Juan province.

The Veladero mine is an active, open-pit gold and silver operation located in the San Juan Province of Argentina. It is a 50/50 joint venture between Barrick Gold Corporation and Shandong Gold Group Co., Ltd. The mine is situated at high altitude, between 4,000 and 4,850 metres above sea level, and exploits a high-sulphidation epithermal gold-silver system.

Production at the mine was 414,000 ounces of gold in 2023 and 505,000 ounces of gold in 2024. The forecast for 2025 is around 460,000 ounces of gold. Accumulated production as of December 2024 was 11,398,729 ounces of gold and 21,398,668 ounces of silver.

Ore is processed using a conventional truck and shovel method, involving a two-stage crushing circuit before valley-fill heap leaching with a cyanide solution. Gold and silver are then recovered using a Merrill-Crowe process, producing gold doré bars on-site. The crushing plant has a capacity of approximately 83,000 tonnes per day. By-product mercury is also collected and stored.

The mine's fleet includes 218-tonne rigid frame haul trucks, hydraulic shovels, and front-end loaders.

An investment of US$271 million is planned through 2027 to sustain an average annual production of approximately 400,000 ounces. A further US$400 million investment has been proposed for the 2025-2028 period under Argentina's Large Investment Incentive Scheme (RIGI) to expand production capacity, expected to add about 1.6 million ounces of gold production over the mine's life. This includes the ongoing construction of new phases for the leach pad, with Phase 7B completed in December 2024 and work on Phase 8, divided into three stages, expected to be completed by 2026. A new Phase 9 has also been announced. A power line connecting the mine to the electrical grid in Chile was energised in December 2022 to improve efficiency and reduce emissions.

By the end of 2024, New Porgera Limited is expected to employ over 3,200 people.

The Porgera mine, located in Enga Province, Papua New Guinea, was placed on care and maintenance in April 2020 after its special mining lease was not renewed. Following extensive negotiations, a new special mining lease was issued in October 2023, and the mine officially restarted operations on 22 December 2023. The first gold pour after the restart was expected in the first quarter of 2024.

Production overview - 2019: gold 600000 oz.

The processing methods at Porgera include gravity concentration, flotation, pressure oxidation, and cyanide leaching.

The Porgera mine had been on care and maintenance since April 2020 after its special mining lease was not renewed by the government of Papua New Guinea. Following extensive negotiations, a new special mining lease was issued to New Porgera Limited in October 2023. A Porgera Project Commencement Agreement has been finalised, and a Community Development Agreement is under negotiation. The economic benefits from the mine are to be shared 53% by the PNG stakeholders and 47% by BNL.

Approximately 7,000 (2020)

Joint venture between Barrick Gold Corporation (61.5% and operator) and Newmont Corporation (38.5%).

Production overview - 2022: gold 1850000 oz, copper 36736179 lbs, silver 1322700 oz; 2021: gold 173067 oz, silver 1322700 oz, copper 36736179 lbs.

The assets of Nevada Gold Mines include two autoclave facilities, two roasting facilities, four oxide mills, a flotation plant and five heap leach facilities.

Hecla Mining is currently engaged in an exploration project named "Silver Valley/Star" in Wallace, Idaho, within the Silver Valley. The project is part of Hecla's strategy to expand its resource base in one of the world's most prolific silver districts.

Rock Creek is a pre-development project operated by Hecla Mining Company, located approximately five miles northeast of Noxon in Sanders County, Montana, United States. Hecla acquired the Rock Creek project in June 2015 through its acquisition of Revett Mining Company. The project is considered to be one of two large silver/copper deposits in the region, the other being the Montanore project. The proposed mine is an underground copper and silver mine. If developed, the mine and processing facility could handle up to 10,000 tons of ore per day for as long as 30 years.

10,000 tons of ore per day

Advanced-stage exploration property in Yukon, Canada, wholly owned by Hecla Mining Company, comprising Tiger and Osiris deposits.

The project could produce approximately 267,000 ounces of gold over its life, with an average diluted grade of 3.82 grams per tonne. Peak annual production was forecast to be 72,860 ounces of gold in the first year of operation, with an average of 61,900 ounces per year over the first three years.

conventional crushing, grinding, and cyanidation by carbon-in-pulp (CIP), with gold recovery from loaded carbon to produce gold doré.

In 2013, the Forrestania Operation employed over 500 people. Barminco served as the primary underground mining contractor from December 2004.

The Flying Fox mine is an underground nickel operation located in the Forrestania Greenstone Belt, approximately 400 kilometres east of Perth in Western Australia. It was part of the broader Forrestania Operation, which included the Spotted Quoll mine and the Cosmic Boy concentrator. The mine was first opened by Outokumpu in 1992, operating until 1998. Western Areas recommenced production in 2006. IGO Limited acquired Western Areas in June 2022, and subsequently sold the Forrestania assets, including the Cosmic Boy plant, to Medallion Metals Limited in March 2026, while retaining nickel and lithium exploration rights. Production at Flying Fox ceased in November 2023 due to reserve depletion, and the broader Forrestania Operation transitioned to care and maintenance in September 2024.

The Forrestania Operation, including Flying Fox, produced 14,028 tonnes of nickel in the 2021-22 financial year and 22,915 tonnes in the 2022-23 financial year. The Flying Fox mine alone produced 12,426 tonnes of contained nickel in the 2016 financial year and 2,990 tonnes of nickel in concentrate in 2008.

Ore from Flying Fox was processed at the Cosmic Boy concentrator using conventional flotation technology. This process involved a three-stage crushing circuit, a ball mill, and flotation tanks to produce nickel concentrate.

Underground mining fleet included five trucks and five loaders. Processing plant: Cosmic Boy concentrator with crushers and grinding mills. Primary underground mining contractor: Barminco.

The Cosmic Boy concentrator, which processed ore from Flying Fox, had its annual processing capacity expanded from 300,000 to 550,000 tonnes. It was later reported to have a capacity of up to 600,000 tonnes per annum.

approximately 7,000 people

Nevada Gold Mines is a joint venture company operated by Barrick Gold Corporation, which holds a 61.5% ownership stake, with Newmont Corporation owning the remaining 38.5%. The joint venture combined the significant mining assets of both companies in northeastern Nevada, United States, to create the world's largest gold-producing complex. The operation is active and employs a workforce of approximately 7,000 people.

2023: Barrick attributable gold production ~1.9 Moz, Newmont attributable gold production 1.17 Moz. 2022: Barrick attributable gold production ~1.9 Moz, Newmont attributable gold production 1.169 Moz.

Two autoclave facilities, two roasting facilities, four oxide mills, a flotation plant, and five heap leach facilities. Oxide ores are treated using heap leaching. High-grade oxide and sulphide ores can be processed through conventional milling and cyanidation. For refractory ores, operations use roasting and autoclaves for pre-treatment. The Carlin complex includes the Gold Quarry Roaster, Goldstrike Autoclave, and Goldstrike Roaster. The Cortez facilities include an oxide mill (Pipeline mill) and heap leach areas. The Phoenix complex has a copper leach pad, an SX/EW plant, and a mill. The Turquoise Ridge Complex uses the Sage Autoclave and the Juniper Oxide CIL plant.

During its peak construction phase, the project is anticipated to employ 7,500 people. Once operational, it is expected to create 4,000 long-term jobs.

Production overview - 2024: gold 13000000 oz, copper 7300000 t.

The project will involve a processing plant to produce a copper-gold concentrate. The development is planned in two phases, with a combined processing capacity of 90 million tonnes per annum when fully operational. Phase 1 will have a processing capacity of 45 million metric tons annually, which will be doubled in Phase 2.

The mine will be a truck-and-shovel operation. Key partners selected to supply processing and mining equipment include Metso, Weir, and Komatsu.

Development planned in two phases, with a combined processing capacity of 90 million tonnes per annum. Phase 1 at 45 million metric tons annually, doubled in Phase 2. Development activity slowed in April 2026 due to escalating security risks, with project review extended until mid-2027, impacting budget and timeline.

The complex has a workforce of approximately 900 employees and contractors.

The Turquoise Ridge Complex is an active gold and silver producer located in Humboldt County, Nevada. It is an integrated operation formed in 2019 by combining Barrick's Turquoise Ridge Mine and Newmont's Twin Creeks complex. The joint venture, Nevada Gold Mines, is operated by Barrick Gold Corporation (61.5% interest) and Newmont Corporation (38.5% interest). The operation involves both underground and open pit mining methods, with underground producing high-grade refractory gold ore and surface operations consisting of the Mega and Vista open pits. As of late 2025, open pit mining was paused, with processing continuing from stockpiles. The mine life is projected to extend to 2050.

In 2023, the Turquoise Ridge Complex produced 514,386 ounces of gold and 163,388 ounces of silver. Production in 2022 was approximately 500,000 ounces of gold.

Processing of ore is conducted through multiple facilities. The Sage autoclave processes high-grade refractory ore, while the Juniper oxide mill handles higher-grade oxide ores. Lower-grade oxide material is treated on heap leach pads. Gold is recovered using conventional carbon-in-leach technology and pressure oxidation for refractory ores.

Underground operations utilise jumbo drills and 45-tonne haul trucks. The surface mining fleet includes Hitachi hydraulic excavators and Caterpillar haul trucks.

A significant expansion project involved the commissioning of a third shaft for the underground mine, reaching a depth of over 3,200 feet. This expansion is expected to increase ore extraction by 40% and add 15 years to the mine's operational life.

300 (projected)

The Rock Creek project, operated by Hecla Mining Company, is a proposed underground silver and copper mine in Sanders County, Montana, approximately five miles northeast of Noxon. Hecla acquired the project in June 2015. The project is currently on hold, as Hecla has withdrawn the Plan of Operations from consideration by the United States Forest Service and has no current plans for activities beyond care and maintenance. The company is instead focusing on its nearby Libby Exploration Project (Montanore), although it notes that common ownership of both ore bodies provides future optionality. The project has faced significant legal challenges. In April 2021, a federal court invalidated the mine's approval, ruling that the U.S. Fish and Wildlife Service and U.S. Forest Service had violated the Endangered Species Act by not adequately considering the full impact on grizzly bears and bull trout. Due to ongoing litigation, no mine-related construction can currently take place on public land.

The proposed plan, which is not being advanced, involved extracting 10,000 tons of ore per day.

Processing would take place at a mill and concentrator complex.

Hecla is the second-largest private employer in Shoshone County. In 2024, the mine had an economic impact of $171 million, which included $54 million in wages.

Production overview - 2024: silver 4900000 oz, lead 31300 t, zinc 13500 t; 2023: silver 3100000 oz.

The processing plant is a conventional flotation concentrator with a capacity of 1,000 tons of ore per day. The process involves crushing, grinding, flotation, and dewatering to produce silver-lead and zinc concentrates. The coarse mill tailing is mixed with cement and used as backfill underground. For 2023, the metallurgical recoveries were 96% for silver, 95% for lead, and 85% for zinc.

The mine utilises jumbo drills, mechanised mining, and truck haulage. Load-Haul-Dump (LHD) units with a capacity of up to 3.5 cubic yards are also in use. Access to the underground workings is through the 18-foot diameter, concrete-lined Silver Shaft. A key project is the #4 Shaft, an internal shaft that reaches 9,600 feet below the surface to access high-grade ore.

The #4 Shaft project is a significant development that provides access to the Gold Hunter deposit, also known as the Lucky Friday Expansion Area. This project is expected to support the mine's extended life. In 2024, exploration drilling was planned to the east of the 30 Vein. A new chiller system was installed underground in 2024 to improve water recycling.

The Silver Valley / Star project is an exploration-stage asset owned by Hecla Mining Company, located in Burke, Shoshone County, Idaho, in the United States. The project is focused on the historical Star Mine, a past producer of silver, lead, and zinc.

444 (2025)

Production overview - 2025: silver 5300000 oz; 2024: silver 4890000 oz, lead 31300 t, zinc 13500 t.

The mine has a surface mill with a capacity of 1,000 tons of ore per day. It produces silver-lead and zinc concentrates, which are transported by truck to a smelter in Trail, British Columbia, Canada. The mining methods employed are underhand and overhand cut-and-fill techniques. A patented Underhand Closed Bench (UCB) mining method is extensively used, accounting for 87% of the tons mined in 2023.

The mine utilises rubber-tired equipment for accessing veins through ramps. Mechanized jumbo drills and truck haulage are used for mining. The primary access is via the 6,205 ft deep Silver Shaft, which has a hoisting capacity of 12 tons per skip. A key piece of infrastructure is the #4 Shaft, an internal shaft that reaches 9,600 feet below the surface to access high-grade ore.

A key project, the #4 Shaft, is complete and provides access to the Gold Hunter/Lucky Friday Expansion Area, which contains the highest-grade ore in the mine's history. This is expected to support an additional 20-30 years of mine life. Capital investment is focused on underground development, a new tailings facility, and a surface cooling project scheduled for completion by mid-2026. The tailings facility expansion is expected to provide capacity until 2045. For 2026, the exploration budget has nearly doubled to $55 million, with a focus on areas including the Lucky Friday mine.