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The Libby Exploration Project, also known as the Montanore project, is operated by Hecla Mining Company through its wholly-owned subsidiary, Montanore Minerals Corporation. Acquired in September 2016, the project is currently in the exploration and evaluation phase, involving dewatering and rehabilitation of an existing adit, and underground exploration to collect data for future mine feasibility. Legal challenges from environmental groups are ongoing, potentially affecting the project's timeline.

Hecla acquired the project, also known as the Montanore project, in September 2016. If the evaluation proves economically feasible, a new Plan of Operations for a full-scale mine would need to be submitted, which would trigger a new and separate permitting process.

The Silver Valley / Star project is an exploration-stage asset owned and operated by the United States-based Hecla Mining Company. It is located in the Silver Valley of northern Idaho, a historically significant silver-producing district. The project is focused on exploring extensions of known mineralisation and identifying new targets within Hecla's extensive land holdings in the region. Hecla has allocated 9% of its 2026 exploration budget to its Silver Valley initiatives, which includes the Star project. The project is situated near Wallace, in Shoshone County, Idaho. The historical Star mine has existing underground workings.

Cleanup activities at what is known as the Hecla Star Complex commenced in 2023. These efforts have included consolidating, re-grading, and capping some smaller waste rock piles to reduce human health exposure. Additionally, shallow groundwater dewatering wells were installed to facilitate construction activities planned for the coming years.

The Republic Project is an exploration-stage asset owned by Hecla Mining Company, located in Washington, United States. The project is situated in the Republic Mining District in Ferry County. Hecla Mining Company lists Republic as an "emerging opportunity" and allocates 1% of its exploration budget to the project. The company's strategic focus for the property includes the integration of historical datasets with 3D modelling and modern exploration techniques. Hecla's land package in the district covers 3,583 acres, encompassing major historic productive trends.

There were zero company employees in 2023, though a minimal staff presence is maintained for site upkeep.

The Aurora mine, located in Mineral County, Nevada, United States, is owned and operated by Hecla Mining Company through its subsidiary, Klondex Aurora Mine Inc. The mine is currently on care and maintenance, with production suspended in the second half of 2021. Historically, it has operated using both open pit and underground mining methods, primarily extracting gold and silver.

The historic Aurora mining district has recorded production of 1.9 million ounces of gold and 20 million ounces of silver.

Existing infrastructure at the site includes a 600-tonne-per-day mill, which is seen as a potential processing hub for the wider Walker Lane trend. There has also been work to modify a water pollution control permit to allow for the potential reprocessing of historical tailings.

Existing infrastructure at the site includes a 600-tonne-per-day mill.

The Polaris Exploration Project was approved in late 2025, allowing exploration activities to commence in 2026 to test multiple epithermal vein systems for high-grade gold and silver. Hecla Mining has allocated a portion of its 2026 exploration and pre-development budget to its Nevada growth projects, including Aurora. There has also been work to modify a water pollution control permit to allow for the potential reprocessing of historical tailings.

Production overview - 2026: silver 0.5 Moz; 2025: silver 3.02 Moz, lead 3.63 kt, zinc 2.24 kt.

The mine has infrastructure that includes a 400 tonne per day mill. A backfill plant's construction was completed and was being commissioned as of early 2025.

The company is in a ramp-up phase with a goal of reaching a throughput rate of 440 tons per day. Hecla is advancing permits to achieve its current permitted capacity, with amended permits for expansion estimated to be received around mid-2029. Exploration efforts are focused on resource conversion and expansion, particularly at the Deep Bermingham ore body and the Bermingham Bear Zone.

444 (2025)

Production overview - 2025: silver 5.26 Moz, lead 34.28 kt, zinc 14.92 kt; 2024: silver 4.9 Moz, lead 31265 t, zinc 13513 t.

Conventional 1,000 short tons per day flotation concentrator mill. Process includes primary jaw crushing, secondary and tertiary cone crushing, ball milling, and flotation to produce silver-lead and zinc concentrates. Concentrates are shipped by truck to a smelter in Trail, British Columbia, Canada. Metallurgical recoveries in 2025 were 94.5% for silver, 94.3% for lead, and 85.1% for zinc.

Deep underground operation accessed via the Silver Shaft (6,200 feet deep) and the #4 Shaft (9,600 feet below surface). Primary mining method is underhand closed bench (UCB) stoping. Ore is mined using mechanized jumbo drills and truck haulage.

A new surface cooling project is expected to be completed by mid-2026. Hecla plans to invest up to $73 million in the operation in the coming years, with capital investment heavily tied to underground development, a new tailings facility, and the surface cooling project.

approximately 510-512 people

The mine is located within the Admiralty Island National Monument.

Production overview - 2025: silver 8.7 Moz, gold 59349 oz, lead 18.2 kt, zinc 51.3 kt; 2023: silver 9.7 Moz, gold 60900 oz, zinc 51500 t, lead 19600 t.

The primary mining methods are cut-and-fill and longhole stoping. The ore concentrating mill uses flotation and gravity processes to recover the minerals. The company is evaluating the development of a pyrite concentrate circuit at the mill to generate an additional marketable concentrate and boost silver and gold recoveries. Hecla is also studying the economic potential of reprocessing mine tailings.

In January 2025, the U.S. Forest Service approved a five-year plan of operations for the Greens Creek Surface Exploration Project. Copper became a payable metal for the mine in 2024, creating a new revenue stream.

As of May 2025, the project employed over 1,800 people. Accommodation is provided at the 500-room Mungala Resort at Ken's Bore, offering rooms three times the size of traditional fly-in, fly-out accommodation.

The Onslow Iron project is an operating open-pit iron ore mine located approximately 150 kilometres east of Onslow in the West Pilbara region of Western Australia. Operated by Mineral Resources (MinRes) on behalf of the Red Hill Iron Joint Venture, which includes Baowu, AMCI, and POSCO, the project unlocks previously stranded iron ore deposits such as Ken's Bore, Upper Cane, and Cardo Bore East. MinRes holds a 57% ownership share and 100% of the project's infrastructure.

First ore was shipped in May 2024. The project was expected to reach its nameplate capacity of 35 million tonnes per annum by June 2025. For the 2025 fiscal year, 14 million tonnes were shipped. In the first half of the 2025-2026 financial year, a yearly production rate of 35 million tonnes was maintained.

The project employs an innovative dust-free pit-to-ship supply chain. Mining involves conventional drill and blast, followed by crushing in three NextGen modular plants. Ore is then transported 150 kilometres by autonomous road trains from Ken's Bore to the Port of Ashburton. At the port, ore is stored in a 220,000-tonne capacity shed before being loaded onto shallow-draft transhippers, which transport it 40 kilometres offshore to larger ocean-going vessels.

The project utilises three in-house designed NextGen modular crushing plants. Ore is transported by a fleet of 120 autonomous 320-tonne jumbo road trains. A fleet of 20,000-tonne capacity shallow-draft transhippers move ore 40 kilometres offshore to larger ocean-going vessels.

In March 2025, Mineral Resources increased by 89% to 744 million tonnes at 56.3% Fe, and Ore Reserves increased by 73% to 359 million tonnes at 57.5% Fe. The mine plan includes developing Cardo Bore East and Upper Cane deposits, connecting them to the Ken's Bore crushing area. Wet processing is planned from the 2028-2029 financial year. The transhipping fleet is expanding, with a fifth vessel arriving in May 2025 and a sixth and seventh expected in 2026.

The Rock Creek project is an underground silver and copper mine currently in a state of care and maintenance. Hecla Mining Company acquired the project in June 2015 through its acquisition of Revett Mining Company. While the project is under development, Hecla is not currently seeking permits for its construction. The company has previously withdrawn the Plan of Operations for Rock Creek from consideration by the United States Forest Service (USFS). Legal challenges have also impacted the project's progression, with a 2021 court ruling invalidating the USFS's approval of the mine's Phase I evaluation adit due to violations of the Endangered Species Act. As a result, the Rock Creek mine currently has no federal authorisation to proceed. In September 2022, RC Resources, a subsidiary of Hecla, requested that the Montana Department of Environmental Quality (DEQ) allow its Montana Pollutant Discharge Elimination System (MPDES) permit to expire, stating that none of the permitted outfalls had been constructed. Despite the current status, Hecla Mining continues to report inferred mineral resources for the project.

Production overview - 2025: silver 3245000 oz, copper 55738 t.

The Polaris Exploration Project is a gold and silver exploration project by Hecla Mining Company in the Aurora Mining District, Nevada, USA. Federal permits were granted in 2025/2026 for a ten-year exploration program starting in 2026, involving road construction and drill sites. No mining or processing is proposed yet; the objective is to explore for high-grade gold and silver. Mining method is undetermined.

600-ton-per-day mill

30-35 (for the exploration phase)

The Libby Exploration Project, also known as the Montanore project, is operated by Hecla Mining Company in Lincoln County, Montana. It is a stratabound sediment-hosted silver-copper deposit. In 2025, the U.S. Forest Service authorized underground exploration and evaluation activities to determine the economic value of the mineralization and inform future studies. The current plan involves dewatering and rehabilitating an existing adit, extending the tunnel, and constructing additional tunnels for exploration.

The current plan involves dewatering and rehabilitating an existing adit, extending the tunnel by 4,200 feet, and constructing additional tunnels for exploration.

352 direct jobs (2024)

The Lucky Friday mine is a deep underground silver, lead, and zinc mine located in the Coeur d'Alene Mining District in northern Idaho, about one mile east of Mullan. It has been in operation since 1942 and is owned and operated by Hecla Mining Company.

Production overview - 2025: silver 5.3 Moz, lead 34.28 kt, zinc 14.92 kt; 2024: silver 4.89 Moz, lead 31300 t, zinc 13500 t.

mill with a capacity of 1,000 tons of ore per day, producing silver-lead and zinc concentrates

patented Underhand Closed Bench (UCB) mining method, Silver Shaft, #4 Shaft

surface cooling project expected to be completed by mid-2026, underground development, new tailings facility

512 people

This mine is located on Admiralty Island.

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

The mine uses a conventional flotation concentrator to produce a gravity gold concentrate, a silver concentrate, a zinc concentrate, and a precious metals concentrate. The mill processes approximately 2,300 tons of ore per day. The primary mining methods are cut and fill and longhole stoping. In 2025, 54% of the tailings were reused as backfill. The company is also evaluating the economic potential of reprocessing tailings to recover critical minerals.

The mine utilises conventional underground mining equipment. The company is advancing the use of tele-remote and battery-powered load, haul, and dump equipment to reduce ventilation requirements and improve worker safety. The underground mobile equipment fleet includes at least one Sandvik LH514 LHD capable of semi-autonomous operation and another that can be operated via a tele-remote system from the surface.

In November 2024, the U.S. Forest Service gave final approval for an extension of the mine's production for 12 to 18 years, ensuring operations can continue past 2031. This extension includes additional capacity for the disposal of mining waste. In January 2025, a five-year plan for surface exploration was approved to identify new mineral targets not accessible from underground. In early 2026, the company received a notice authorising surface exploration operations to commence. The company is also evaluating the feasibility of a pyrite concentrate circuit at the mill, which could provide cash flow in about two years.

The Colina Project is an open pit lithium mine in Minas Gerais, Brazil, currently under development. A Definitive Feasibility Study (DFS) is anticipated for completion in Q3 2024, with a final investment decision in early 2025 and first production targeted for 2026. The project has been granted "Priority Status" by the Minas Gerais State Government. Preliminary environmental and installation licenses were awarded in Q1 2025. The Preliminary Economic Assessment (PEA) outlines a two-phased operation with a life-of-mine average annual production projected to be 405,000 tonnes of 5.5% Li2O spodumene concentrate (SC5.5) and 123,000 tonnes of 3% Li2O spodumene concentrate (SC3).

Production overview - 2024: lithium 886250 t; 2023: lithium 825500 t.

The proposed operation involves a standalone processing facility using Dense Media Separation (DMS) and gravity separation to produce high-quality spodumene concentrates. The design includes provisions for future expansion and the addition of processing stages like fines flotation.

Phase 2 is expected to start in 2028 and reach nameplate capacity in 2029. A potential Phase 3 extension is to be evaluated as part of the DFS. Pilbara Minerals plans to undertake further exploration to potentially expand the deposit and will work to optimise the mine plan and project flowsheet.

3,173 (including contractors, as of 31 December 2025)

Production overview - 2025: gold 673000 koz; 2024: gold 309000 oz.

The metallurgical plant has a twin-circuit sulphide and oxide plant with conventional carbon-in-leach (CIL), gravity recovery, a float, and an ultra-fine grind circuit. The plant can process 7.2 million tonnes of ore per year.

The mine is supported by three hydropower stations and a 16MW solar plant with a battery energy storage system. Mining methods include truck and shovel, as well as longitudinal and transverse longhole open stoping.

A new NI 43-101 technical report was filed in February 2026, with an effective date of December 31, 2025. Exploration is focused on the ARK-KCD corridor, which shows potential to significantly grow the mine's reserve base.