Directory

In 2020, the previous owner, Alexco Resource Corp., employed about 150 people. Hecla Mining Company's total workforce in 2024 was 1,817 direct workers and 531 contractors.

Hecla Mining Company acquired 100% of the Keno Hill project on 7 September 2022. The company began commissioning the plant in the second quarter of 2023 and commenced production in mid-2023. The mine achieved its first year of profitability and positive free cash flow in 2025. A technical report filed in March 2024 outlined a 45% increase in silver reserves since the acquisition, totalling 55 million ounces of silver. The current mine plan is based on an 11-year reserve life.

Production overview - 2025: silver 3018490 oz, lead 3633 t, zinc 2247 t; 2024: silver 2773873 oz, lead 2930 t, zinc 1507 t.

The mine has a 400 tonne per day mill and produces silver, lead, and zinc concentrates.

The backfill plant construction was completed and was undergoing commissioning in early 2025. Hecla's focus is on ramping up the mine to its permitted capacity of 400 tonnes per day. Significant exploration and resource expansion drilling is ongoing, particularly focused on the Bermingham deposit.

The Connaught property is a hard-rock exploration project located in the Dawson Mining District of the Yukon, Canada. It is owned by Hecla Mining Company, following the acquisition of ATAC Resources Ltd. in July 2023. The project is considered a prospect with identified gold, silver, and base metal mineralisation.

Production overview - 1976: gold 0.0002407 t, silver 0.5364 t, lead 144.42 t; 1966: gold 0.00004767 t, silver 0.05214 t, lead 15.27 t.

expected to employ over 7,500 people during peak construction and create approximately 3,500 to 4,000 long-term jobs during production. As of March 2025, 77% of permanent employees were from Balochistan province.

The Reko Diq project, reconstituted in December 2022, has an updated feasibility study and ESIA approved. In April 2026, Barrick slowed development to review security, capital, financing, scope, and timeline, with the review expected until mid-2027. Phase 1 major works were initially planned for 2025 with first production targeted for end of 2028, but this timeline is under review.

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

The project will be a truck-and-shovel open pit operation with processing facilities to produce a high-quality copper-gold concentrate. The processing plant will be constructed in two phases, with Phase 1 planned to process 45 million tonnes of ore per annum starting from 2028. Phase 2 is planned to start by 2034 and will double the processing capacity to 90 million tonnes per annum.

Fluor has been selected as the lead engineering, procurement, and construction management (EPCM) partner. Key equipment suppliers selected include Metso, Weir, and Komatsu.

The project is planned in two phases. Major works for Phase 1 were planned to commence in 2025, with first production targeted for the end of 2028, though this timeline is now under review. Phase 2 is planned to start by 2034 and will double the processing capacity to 90 million tonnes per annum.

Approximately 3,200 people by the end of 2024

Production overview - 2025: gold 279000 oz.

Conventional method including crushing and grinding, gravity recovery, flotation, pressure oxidation, and carbon-in-pulp (CIP) and carbon-in-leach (CIL) cyanide leaching to recover gold. The plant's design throughput rate is 134 dry tonnes per hour of tailings to produce 100 cubic metres per hour of paste for backfill.

Caterpillar 777 and 789 haul trucks, O&K shovels, Elphinstone LHDs and haul trucks

Following the reopening, a new Special Mining Lease (SML 13) was issued to New Porgera Limited. The economic benefits from the mine are to be shared, with 53% allocated to PNG stakeholders and 47% to Barrick Niugini Limited. A Community Development Agreement is in the process of being finalised.

The Connaught project is currently in the exploration stage. Hecla's operational map lists the primary commodity of interest at Connaught as copper (Cu). Historically, the project has been explored for high-grade silver, lead, zinc, and gold, modelled after the Keno Hill district mines.

Hecla Mining Company acquired the Connaught project through its acquisition of ATAC Resources, which was completed in July 2023.

The Kinskuch property has been consolidated into Dolly Varden's larger Kitsault Valley Project, significantly expanding the project's total area to approximately 77,000 hectares. The property is in the exploration and development stage. A renewed five-year exploration permit is in place for the Kinskuch property, which is situated on the traditional lands of the Nisga'a and Gitanyow First Nations. Located in the Golden Triangle of British Columbia, Canada, the Kinskuch property is adjacent to Dolly Varden's existing Kitsault Valley Project. The acquisition has tripled the strike length of the prospective Hazelton Group volcanic rocks within Dolly Varden's holdings by adding the Illiance trend to the existing Kitsault Valley trend. The property is considered underexplored, with potential for silver, gold, and copper mineralisation.

The Connaught property is located approximately 65 km west of Dawson City. The property was historically explored for high-grade epithermal veins, with 26 distinct veins identified. More recently, the project has been re-evaluated for its porphyry copper-gold-molybdenum potential. Hecla Mining lists copper as the primary commodity of interest for the Connaught property on its website. The property is part of Hecla's North American exploration projects.

Production overview - 1976: gold 218 t, silver 218 t, lead 218 t; 1966: gold 22.7 t, silver 22.7 t, lead 22.7 t.

The San Sebastian mine, operated by Hecla Mining Company, is located in Durango, Mexico. It was initially an underground mine on the Francine Vein from 2001 to 2005, producing over 0.5 million tons of mineralised material with average grades of 11.7 g/t gold and 763 g/t silver. Mineralisation occurs as low and intermediate sulfidation epithermal veins, with historical primary veins including Francine, East Francine, Middle, North, and Andrea, averaging 2.5 metres in width.

Production overview - 2005: silver 12700000 oz, gold 200000 oz.

Ongoing exploration focuses on several vein systems including Middle, North, North Francine, El Bronco, El Tigre, El Toro, and the La Roca district.

The project is expected to employ 7,500 people during peak construction and create 4,000 long-term jobs. As of March 2025, 77% of employees of the Reko Diq Mining Company were from Balochistan province.

Production overview - 2025: copper 11700000 t, gold 21000000 oz.

The mine will be a truck-and-shovel operation with processing facilities to produce a high-quality copper-gold concentrate. The development includes two open pits, a processing plant, ore stockpiles, waste rock dumps, and a tailings storage facility. Construction is planned in two phases, with a combined process capacity of 90 million tonnes per annum.

Fluor has been selected as the lead engineering, procurement, and construction management (EPCM) partner. Key partners for supplying processing and mining equipment include Metso, Weir, and Komatsu.

The Reko Diq project is a greenfield open-pit mining operation that will be developed in two phases. The reconstitution of the project was completed in December 2022. An updated feasibility study was completed, and in April 2025, the joint venture shareholders approved it and the conditional development capital for phase one. The Environmental and Social Impact Assessment (ESIA) has been officially approved by government authorities. However, in April 2026, Barrick announced a slowdown in development activity and an extension of the project review until mid-2027 due to escalating security risks. This is expected to cause significant increases to the previously disclosed capital budget and timeline. The previously targeted first production by the end of 2028 is now under review.

The project is expected to employ 7,500 people during peak construction and create 4,000 long-term jobs once in production.

Production overview - 2025: copper 7300000 t, gold 404.4 t.

The project is planned as a conventional truck-and-shovel open pit operation with milling facilities to produce a high-quality copper-gold concentrate. Development is expected in two phases. Phase 1 is planned to process approximately 45 million tonnes of ore per annum. Phase 2 is planned to double the processing capacity to 90 million tonnes per annum.

Fluor has been selected as the lead engineering, procurement, and construction management (EPCM) partner. Key equipment suppliers include Metso, Weir, and Komatsu.

The Reko Diq project is one of the world's largest undeveloped copper-gold deposits. An updated feasibility study was approved by the joint venture shareholders in April 2025. However, in April 2026, Barrick announced it was slowing development activity to conduct a project review until mid-2027 due to escalating security risks in the region. This review will assess the security situation, capital requirements, project financing, scope, and timeline. The previously targeted first production by the end of 2028 is now subject to potential significant delays. The estimated capital cost for Phase 1 was revised in September 2025 to $7.723 billion. The previously disclosed estimate for Phase 1 was between $5.6 billion and $6.0 billion, with Phase 2 estimated between $3.3 billion and $3.6 billion.

As of May 2024, the workforce comprised over 2,200 people. Of these, 97% were Papua New Guineans, with 36% from the Porgera-Paiela District and 21% from the host province of Enga. Only 3% of the workforce were non-PNG citizens. NPL expects to employ approximately 3,200 people by the end of 2024.

Production overview - 2024: gold 188088 oz.

The processing plant was fully commissioned in August 2024 following the mine's restart. The process involves crushing and grinding, gravity recovery, flotation, and pressure oxidation of the concentrate in autoclaves, followed by a carbon-in-pulp (CIP) cyanide leaching circuit to produce gold doré.

The surface fleet is being replaced with an order placed in the first quarter of 2025 for seven new Sandvik drill rigs. This includes four Sandvik DR410i rotary blasthole drill rigs and three Leopard™ DI650i down-the-hole drill rigs, with deliveries expected between June and November 2025. This follows a partnership with Sandvik to supply trucks, loaders, and drills for the underground operations, with the first units delivered in 2024.

With the resumption of operations under New Porgera Limited, the mine is ramping up to full production, which was expected by the end of the third quarter of 2024. The new ownership and benefit-sharing agreements are intended to provide a stable, long-term operating environment. A complete replacement of the surface drill fleet was initiated in early 2025 to modernise operations.

As of July 2025, 96% of the mine's workforce are Tanzanian nationals, with 49% sourced from local communities. The combined workforce for Twiga Minerals' Bulyanhulu and North Mara mines was 6,185 people in early 2025.

Bulyanhulu is an operating underground gold mine in the Kahama district of the Shinyanga Region in north-west Tanzania, approximately 55 kilometres south of Lake Victoria. The operation is a joint venture named Twiga Minerals Corporation, which is 84% owned by Barrick Gold Corporation and 16% owned by the Government of Tanzania. Commercial production began in 2001. Operations were suspended and the mine was placed on care and maintenance in 2017, with underground mining restarting in late 2020. The current mine life is expected to extend to 2034. The primary commodities produced are gold, with silver and copper as by-products.

Gold production was 180,000 ounces in 2023. The combined output for the Bulyanhulu and North Mara mines was 547,000 ounces in 2022.

The processing plant has a capacity of approximately 3,300 tonnes of ore per day. The circuit includes primary and secondary crushing, semi-autogenous grinding, gravity separation, flotation, and a carbon-in-leach (CIL) process. The facility now produces gold doré bars on-site, a shift from its previous practice of shipping concentrates. A PhotonAssay laboratory has been commissioned for more accurate analysis.

The mine is a trackless underground operation accessed via a vertical shaft extending 1.1 kilometres deep and an internal ramp system.

Expansion and development efforts are focused on ramping up access to new reserves, including the Deep West and Upper West areas. Development of the Upper West decline is well advanced, with first ore expected by the end of 2025. Excavation of the near-surface Reef 2 Upper East area is planned to start in 2026. The company is also actively exploring on newly acquired prospecting licences adjacent to the mine to support future reserve growth.

512 (as of 2024)

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

Production overview - 2025: silver 8700000 oz, gold 59349 oz, lead 18200 t, zinc 51300 t; 2024: silver 8500000 oz, gold 55275 oz.

The mine uses an ore concentrating mill with flotation and gravity processes. It also has a dry stacked tailings facility. In 2024, 46% of tailings were reused as backfill.

The primary mining methods are cut-and-fill and longhole stoping. The mine has been supplied with 480.9 metres of Safescape Laddertube.

Hecla Mining Company has proposed a five-year extension for surface exploration from 2026 to 2030. For 2026, the company plans to nearly double its exploration budget compared to the previous year, with a focus on expanding mineralisation near resource boundaries and converting inferred resources.

Over 2,000 people (97% Papua New Guinean as of late 2025), expected to reach approximately 3,200 by the end of 2025.

Production overview - 2025: gold 279000 oz; 2009: gold 572595 oz, silver 94764 oz.

Ore processing plant involves crushing, grinding, flotation, pressure oxidation, and leach/carbon-in-leach (CIL) operations. The plant has an annual throughput rate of not less than 5 million tonnes of ore.

Open pit operations historically used 175-ton and 90-ton haul trucks, 40-ton shovels, and 35-ton excavators. Underground mine operates a trackless mining fleet, including K 2900 loaders and 45-ton and 55-ton capacity haul trucks. In early 2025, an order was placed for seven new Sandvik surface drill rigs (four DR410i rotary blasthole, three Leopard DI650i down-the-hole) to replace an older fleet.

Reopening formalised by Porgera Project Commencement Agreement; new Special Mining Lease (SML 13) granted October 2023. Economic benefits shared 53% by PNG stakeholders and 47% by Barrick Niugini Limited. Includes USD$15 million landowner restart payment and annual USD$3 million sustainability payments for ten years into a development fund.

Connaught is an exploration-stage property located in the Yukon, Canada. Historically explored as a high-grade silver-lead-zinc-copper-gold vein prospect, with recent exploration identifying copper-molybdenum-gold porphyry potential.

Production overview - 1966: gold 22.7 t, silver 22.7 t, lead 22.7 t.

approximately 270 people

Duck Pond Operations, a former underground mine in Newfoundland and Labrador, Canada, is owned by Teck Resources Limited. The mine ceased operations on 30 June 2015, due to the exhaustion of its ore reserves. Teck continues to manage the site through its closure and reclamation phases, with recent inspections of the Tailings Management Facility noted in 2020 and 2023. The mill was demolished and removed from the site in 2022.

processed 5.0 million tonnes of ore; capacity of 1,800 tonnes per day

semi-autogenous grinding (SAG) mill, a ball mill, and a flotation circuit to produce separate copper and zinc concentrates

A total of 15.9 million tonnes was mined over the 11 years of production.

The proposed processing method involves a conventional plant with a nominal throughput of 133,000 tonnes per day. The process would use crushing, milling and filtering to produce ore concentrates. The joint venture is investigating the potential of coarse particle flotation to optimise the milling process and reduce power costs.

The proposed mining method is conventional truck and shovel. A solar array and battery installation has been installed to reduce diesel consumption for the camp power, cutting carbon emissions for the camp by an estimated 70%.

The Schaft Creek project is one of North America's largest undeveloped porphyry copper-gold-molybdenum-silver deposits. The SCJV is advancing the project, with the objective to transition from the scoping stage to a pre-feasibility study (PFS), which is anticipated to commence in early 2026. The 2025 program, with a budget of C$15.8 million, focused on technical investigations of key infrastructure, including drilling, geophysical surveys, and ongoing environmental baseline studies. The environmental assessment for the project was withdrawn in 2016 and will require a new process.

more than 360 direct operations jobs and 700 construction jobs

The NewRange Copper Nickel project consists of two separate mineral deposits in northeastern Minnesota: NorthMet and Mesaba. The project is currently in the permitting and study phase. In June 2023, the U.S. Army Corps of Engineers revoked the project's Section 404 Clean Water Act Permit. The Minnesota Department of Natural Resources has also delayed proceedings for the permit to mine, with resolution not expected until at least late 2025, pending the outcome of ongoing studies. These studies are assessing potential changes to the project's design, including tailings storage, water treatment, and production efficiency.

initial planned ore processing rate is 32,000 tons per day, though studies are underway to potentially increase this to 40,000 tons per day.

primary crushing circuit, a semi-autogenous grinding (SAG) mill, a ball mill, and a flotation circuit to produce copper and nickel-copper concentrates. A second phase may include a hydrometallurgical plant to further process nickel sulfide concentrates.

conventional open pit, truck and shovel operation, primary crushing circuit, semi-autogenous grinding (SAG) mill, ball mill, flotation circuit

A second phase may include a hydrometallurgical plant to further process nickel sulfide concentrates. Studies are underway to potentially increase the initial planned ore processing rate from 32,000 tons per day to 40,000 tons per day.