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As of 31 December 2021, the mine employed 464 people.

The Greens Creek mine, located on Admiralty Island in southeast Alaska, is one of the world's largest primary silver mines. It is owned and operated by Hecla Mining Company. The underground operation produces silver, gold, zinc, and lead. The mine operates 24 hours a day, 365 days a year. The deposit is a volcanogenic massive sulphide deposit with a high precious metal content.

Production overview - 2025: silver 8700000 oz, gold 59349 oz, lead 18200 t, zinc 51300 t; 2023: silver 9700000 oz, gold 60900 oz, lead 19600 t, zinc 51500 t.

The ore is processed at a concentrating mill with a capacity of approximately 2,300 tons of ore per day. The processing facility uses a SAG/ball mill grinding circuit, followed by differential flotation to produce three concentrates: a silver concentrate, a zinc concentrate, and a zinc-rich precious metals concentrate. A gravity circuit is also used to recover free gold. The mine utilises a dry-stack method for its tailings facility. For 2025, the metallurgical recoveries were 79.3% for silver, 74% for gold, 82.6% for lead, and 88.8% for zinc.

The primary mining methods are cut-and-fill and longhole stoping.

In January 2026, the U.S. Forest Service approved a five-year plan of operations for the Greens Creek Surface Exploration Project, which will test existing mineralised targets and identify new ones not accessible from underground. Hecla Mining Company plans to nearly double its company-wide exploration and pre-development investment to $55 million in 2026, with a focus on replacing or exceeding annual reserve depletion. Capital investment at Greens Creek in 2026 will primarily be for mine development and the expansion of its tailings facility, which is expected to increase capacity to 2045.

Initial production commenced Q4 2025; first concentrate produced 18 November 2025.

Phase 1 concentrator with 770 ktpa milling capacity.

Shaft 3 set to be operational by April 2026, increasing hoisting capacity to 5 Mtpa.

Phased development: Phase 1 in production; Phase 2 expansion (Q4 2027 completion) to 4.1 Mtpa processing capacity, 450koz 3PE+Au, 9kt nickel, 6kt copper; Phase 3 expansion (PEA) to 10.7 Mtpa processing capacity, 1Moz 3PE+Au, 22kt nickel, 13kt copper.

6000 (as of 2025-02-18)

Production overview - 2025: copper 466000000 t; 2024: copper 437061 t.

The processing method at Kamoa-Kakula is underground mining followed by flotation. The complex includes Phase 1, 2, and 3 concentrators. The Phase 3 concentrator was completed ahead of schedule and began producing concentrate in June 2024, reaching commercial production in August 2024. A new 500,000-tonne-per-annum direct-to-blister copper smelter, the largest in Africa, commenced heat-up on 21 November 2025 and produced its first anodes on 29 December 2025. This on-site smelter is expected to significantly reduce logistics costs.

The underground mining fleet includes Epiroc Minetruck MT65 haulers, Scooptram ST18 loaders, Boomer 282 face drilling rigs, and Simba E70 S production drilling rigs. All units are equipped with Epiroc's telematics system for real-time monitoring of machine performance and productivity.

The Kamoa-Kakula 2023 Pre-Feasibility Study outlines a staged increase in production capacity up to a total of 19.2 million tonnes per annum by 2030. A 2023 preliminary economic assessment has projected a nine-year mine life extension, bringing the total to 42 years. This extension includes the development of four new underground mines.

Production overview - 2025: lithium 2120 t; 2024: lithium 3508 t.

The facility is designed to process spodumene concentrate from the Greenbushes mine into battery-grade lithium hydroxide. Train 1 has a nameplate capacity of 24,000 tonnes per annum.

Planned expansion, Lithium Hydroxide Plant 2 (LHP2), ceased in January 2025. IGO has fully impaired its 49% stake in Train 1 as of July 2025. Joint venture partners are discussing the optimal future pathway for the plant.

more than 1,500 people

Production overview - 2023: mineral sands 1.43 Mt.

The Greenbushes operation has four processing plants: a technical grade plant (TGP1), two chemical grade plants (CGP1 and CGP2), and a tailings retreatment plant (TRP). A third chemical grade plant (CGP3) commenced commissioning in December 2025. The processing method involves crushing, screening, high-pressure grinding rollers (HPGR), and a deagglomerator, followed by gravity separation, heavy media, flotation, and magnetic processes to produce lithium concentrates.

Mining is a conventional open-pit, drill and blast method. The processing facilities include crushers, screens, High-Pressure Grinding Rollers (HPGR), and deagglomerators.

The mine is undergoing significant expansion. Chemical Grade Plant 3 (CGP3) has a nameplate capacity of 2.4Mtpa and is expected to ramp up production through 2H26. There are plans for a potential Chemical Grade Plant 4 (CGP4) with construction anticipated to start in 2027. The expansion also includes the development of new waste rock landforms and increased water storage capacity.

179 people

The Odysseus Underground Mine, part of the Cosmos Nickel Project, is located 30 kilometres north of Leinster in Western Australia. It was transitioned into care and maintenance by the end of May 2024 due to reduced mine life, delays, increased operating and capital costs, and a significant deterioration in nickel prices. IGO plans to assess its future viability with a new study commencing in Q4 2024.

Production overview - 2022: nickel 164500 t.

The plant utilises a conventional sulphide processing route with grinding and flotation technology to produce concentrate. The planned mining method for the Odysseus underground operation was single-lift long-hole open stoping with paste fill.

New primary, secondary, and tertiary crushing and screening, a new primary mill, refurbished secondary and regrind mills, and new and refurbished flotation and thickening circuits.

The existing Cosmos processing plant was being refurbished and upgraded to increase its capacity from 750,000 tonnes per annum to 1.1 million tonnes per annum.

As of January 2024, Perenti, through its subsidiary Barminco, employed 179 people for underground mining services at the Cosmos Project.

The Cosmos Project is 100% owned and operated by IGO Limited. The project is located 30km north of Leinster in Western Australia. As of June 2024, the project has been officially transitioned into care and maintenance due to a shorter expected mine life, delays in reaching full production capacity, increased operating and capital costs, and a significant deterioration in nickel prices. IGO intends to maintain the option to restart the project if market conditions improve.

Production overview - 2023: nickel 96.9 kt, cobalt 3.3 kt, copper 4.8 kt.

The Cosmos Project includes a nickel concentrator facility that was undergoing an upgrade to increase its throughput capacity. The upgrade was planned in two stages, first to 900,000 tonnes per annum and then further to 1.1 million tonnes per annum. The upgraded circuit was designed to include new primary, secondary, and tertiary crushing and screening, a new primary mill, refurbished secondary and regrind mills, new and refurbished flotation circuits, and new thickeners and filters. Prior to care and maintenance, some ore from the Odysseus deposit was processed through the partially new and refurbished concentrator starting on 6 November 2023, with nearly 295,000 tonnes processed until operations ceased on 22 May 2024.

IGO commissioned a study with Perenti and ABB to evaluate the full underground electrification of the Cosmos mine.

Located 400km east of Perth in Western Australia, the site was previously known as the Forrestania Operation, a nickel mining facility operated by IGO Limited. Production at the underground nickel mines, Flying Fox and Spotted Quoll, ceased in September 2024 as the operation reached the end of its economic resources, and the site was transitioned to care and maintenance. Following the acquisition by Medallion Metals in March 2026, the project was renamed the Forrestania Gold Project (FGP). It is now positioned as Medallion's long-term gold processing and development hub.

Production overview - 2023: nickel 22915 t.

The Forrestania Gold Project includes the Cosmic Boy processing plant and associated infrastructure. Medallion Metals intends to modify the existing sulphide flotation plant to process gold and copper ore from its Ravensthorpe Gold Project. The company's feasibility study for the integrated project confirmed a processing pathway using flotation and carbon-in-leach technology at the Cosmic Boy facility.

Medallion Metals is progressing technical work to support the development of the Forrestania Gold Project as a central processing hub. This is a key component of the company's broader "Sulphide Development Strategy". A December 2024 scoping study for the integrated Ravensthorpe-Forrestania project indicated a pre-production capital requirement of $73 million, which covers mine establishment at Ravensthorpe and modifications to the Cosmic Boy processing plant. A Final Investment Decision for the integrated project was targeted for the fourth quarter of 2025.

Approximately 400 people were employed on site in 2017, including IGO employees and contractors.

The Nova Operation consists of two orebodies, Nova and Bollinger, which are now recognised as a single continuous deposit. The mine is located in the Fraser Range, approximately 160km east-northeast of Norseman. The Ngadju People are the Traditional Owners of the land.

Production overview - 2025: nickel 16371 t, copper 7324 t, cobalt 581 t; 2024: nickel 20806 t, copper 9922 t.

The processing plant produces nickel and copper concentrates. The process involves a SAG milling circuit. The sulphide minerals are highly tractable to traditional separation techniques.

The mine uses underground mining equipment. A 19MW diesel power station, supplemented by a 5.5MW solar farm, provides power to the operation.

IGO announced in March 2025 that the mine is expected to reach its end of life by late 2026. A final Mine Closure Plan is anticipated to be submitted in mid-2026.

30 to 35 people

The Libby Exploration Project, 100% owned by Hecla Mining Company, is an underground exploration project in Lincoln County, Montana. It involves a 16-year period of underground exploration and evaluation, including dewatering and rehabilitating an existing 7,000-foot tunnel and extending it by 4,200 feet, plus constructing additional tunnels. The project is in the exploration phase following U.S. Forest Service approval, with an Environmental Assessment underway. A lawsuit has been filed by environmental groups challenging the approval.

Production overview - 2024: silver 183 Moz, copper 1500 Mlbs.

277 employees (as of May 2025), with a high percentage of fly-in/fly-out workers

The Keno Hill mine is an active underground operation owned 100% by Hecla Mining Company. Situated in the Keno Hill Silver District, 350 kilometres north of Whitehorse, the property is fully permitted with infrastructure including a 400 tonne per day mill, an on-site camp, and grid hydropower access. In 2025, the mine achieved its first full year of profitability and positive free cash flow generation under Hecla's ownership. The company is focused on ramping up production towards a planned throughput of 440 tonnes per day.

Production overview - 2025: silver 3020000 oz, lead 3630 kt, zinc 2240 kt; 2024: silver 2773873 oz.

The mine uses a conventional flotation mill to produce lead-silver and zinc-silver concentrates.

The site has a conventional flotation mill with a permitted capacity of 400 tonnes per day, a primary crusher, grinding mills, and flotation circuits. In 2025, construction of the backfill plant was completed and the plant is now being commissioned.

Hecla is advancing Keno Hill with a planned capital investment of $61-$66 million for 2026, which includes mine development, a waste storage facility, and a water treatment plant. The primary operational goal is to ramp up mill throughput to a steady state of 440 tonnes per day. A significant exploration program is underway to expand resources, with a focus on the Bermingham deposit, including the Bear Zone and a potential new high-grade ore shoot with an estimated potential of 50 million ounces.

Workforce covered by a six-year collective bargaining agreement (United Steelworkers (USW) Union Local 5114 ratified in January 2023).

The Lucky Friday mine is a deep underground silver, lead, and zinc mine located in the Coeur d'Alene Mining District of northern Idaho. It began operating in 1942 and is owned and operated by Hecla Mining Company. The mine utilizes the Underhand Closed Bench (UCB) mining method to improve safety and productivity in deep, high-stress, narrow-vein conditions.

Production overview - 2025: silver 5260686 oz; 2024: silver 4890949 oz.

Concentrator facility with a current operating rate of 1,000 short tons per day, producing silver-lead and zinc concentrates. These concentrates are transported by truck to a smelter in Trail, British Columbia, Canada.

Silver Shaft, #4 Shaft

The #4 Shaft has been completed and is operational, extending to a depth of 9,600 feet below the surface, providing access to higher-grade ore in the Gold Hunter/Lucky Friday Expansion Area. A surface cooling project is underway, expected to be completed by mid-2026, to increase cooling capacity for operations over the reserve mine life. Exploration drilling is planned for 2024 to the east of the 30 Vein.

As of 2024, approximately 512 people were employed at the mine.

Production overview - 2025: silver 8700000 oz, gold 59349 oz; 2024: silver 8500000 oz, gold 55275 oz.

The mine uses flotation and gravity processes to recover the metals. The ore is processed at an on-site concentrating mill. Three types of concentrates are produced: a silver concentrate, a zinc concentrate, and a zinc-rich precious metals concentrate. A gravity circuit is used to recover free gold.

A recent decision by the U.S. Forest Service has approved an expansion of the mine's tailings disposal facility, extending the mine's production life by 12 to 18 years, past 2031 to at least 2043. The expansion will be implemented in two phases, providing additional capacity for mining waste material.

The Silver Valley/Star project is an exploration-stage asset located in the Silver Valley of northern Idaho. Hecla Mining Company holds a 100% interest in this project. The current operating status is exploration, a revision from the previously listed "under development".

The San Juan Silver project is a high-impact development project for Hecla Mining, with exploration efforts focused on resource confirmation and expansion. The project encompasses the entire Creede Mining District, a historically significant silver-producing area. The primary focus is on the Bulldog Mine, which has a history of producing 25 million ounces of silver between 1969 and 1985. Hecla is strategically advancing the project to access underground infrastructure to confirm and expand the existing resource base. The company's exploration strategy includes a comprehensive approach, targeting 30 miles of permissive strike length along known mineralised structures.

Production overview - 2025: silver 36760000 oz, gold 26000 oz.

The Rock Creek project, located approximately five miles northeast of Noxon, is a pre-development stage mine. Hecla Mining Company is not presently seeking permits for the mine's construction and is instead focused on its nearby Libby Exploration Project. The project does not have current federal authorisation to proceed. A 2021 court decision invalidated the U.S. Forest Service's approval for the mine's initial evaluation phase. The court ruled that the U.S. Forest Service and the U.S. Fish and Wildlife Service had violated the Endangered Species Act by not adequately considering the impacts of the full mine proposal on protected grizzly bears and bull trout. Should Hecla decide to seek a new permit in the future, new environmental analyses would be required. The project has faced long-standing legal challenges and opposition from environmental groups due to concerns about its potential impact on the Cabinet Mountains Wilderness, water quality, and endangered species.

Production overview - 2025: silver 3245000 oz.

The Republic project is an exploration-stage asset for Hecla Mining Company in Washington, United States, focused on gold and silver. It covers 3,583 acres, encompassing historical productive trends. Hecla allocated 1% of its $22M 2025 exploration budget to Republic, with the total budget increasing to $55M in 2026. Hecla previously operated the Knob Hill mine in the district from 1981 to 1995.

Rackla is an advanced-stage exploration property in the Mayo region of Yukon. Hecla Mining Company acquired the Rackla property through its acquisition of ATAC Resources Ltd., a transaction that was finalised on 7 July 2023. The property includes the Osiris and Tiger deposits. The Osiris deposit is a Carlin-type system, while the Tiger deposit is a carbonate replacement deposit. The property covers an extensive area of over 650 square miles and has identified gold, silver, and base metal mineralisation. A Preliminary Economic Assessment for the Tiger deposit in 2020 proposed open-pit mining. Hecla is undertaking a desktop review of the property in 2025 and intends to launch a thorough exploration program in 2026.

Production overview - 2022: gold 1685000 oz; 2020: gold 464000 oz.

A 2020 Preliminary Economic Assessment for the Tiger deposit suggested a processing plant that would use conventional crushing, grinding, and carbon-in-pulp cyanidation to produce gold doré.

Hecla is undertaking a desktop review of the property in 2025 and intends to launch a thorough exploration program in 2026.

The Libby Exploration Project is a stratabound sediment-hosted silver-copper deposit situated in Lincoln County, Montana. Hecla Mining Company acquired the project, formerly known as Montanore, in September 2016. In October 2025, the U.S. Forest Service issued a final decision notice and finding of no significant impact, authorising a 16-year phase of underground exploration and evaluation. This phase is designed to gather geological, hydrological, and environmental data to assess the feasibility of a future mine. The approved plan includes dewatering and rehabilitating an existing 7,000-foot adit, extending the tunnel by 4,200 feet, and constructing additional tunnels for exploration. In March 2026, a coalition of environmental groups filed a lawsuit challenging the federal approval of the project, citing concerns about the environmental review process and potential impacts on protected species and wilderness areas.

Production overview - 2024: silver 183 Moz, copper 1500000000 lbs.

The Kinskuch property is located in the Golden Triangle of northwestern British Columbia. It is now part of Dolly Varden Silver Corporation's larger Kitsault Valley Project. The property is considered prospective for silver, gold, and copper mineralisation. Dolly Varden Silver Corporation commenced a 35,000-metre diamond drilling program in 2025 for the Kitsault Valley Project, which includes the Kinskuch property. The exploration program is focused on expanding high-grade silver and gold mineralisation.

The acquisition of the Kinskuch property increased Dolly Varden's Kitsault Valley Project area to approximately 77,000 hectares. Dolly Varden Silver Corporation commenced a 35,000-metre diamond drilling program in 2025 for the Kitsault Valley Project, which includes the Kinskuch property.