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The construction of the QB2 project created over 30,000 jobs. During its operational life, the mine is expected to employ more than 3,000 local workers.

The Quebrada Blanca mine, an open-pit operation in Chile's Tarapacá Region, is operated by Compañía Minera Teck Quebrada Blanca S.A. Teck Resources holds 60%, Sumitomo Metal Mining and Sumitomo Corporation collectively hold 30%, and Codelco holds 10% after acquiring the stake in 2024. The original mine began production in 1994, exploiting a near-surface supergene copper deposit. The Quebrada Blanca Phase 2 (QB2) expansion, inaugurated in October 2023, develops the deeper sulphide resource, extending the mine's life.

Production guidance for 2025 is between 170,000 and 190,000 tonnes of copper and 1,700 to 2,500 tonnes of molybdenum. For the first five full years, the expanded operation is expected to produce an average of 316,000 tonnes of copper-equivalent annually.

The processing facilities include a new concentrator plant with a capacity of 140,000 tonnes per day, performing crushing, milling, and flotation. Copper concentrate is transported via a 165-kilometre pipeline to a port. A molybdenum plant was expected to complete its ramp-up by the end of the second quarter of 2024.

The haulage fleet includes Caterpillar 794AC electric drive autonomous trucks.

The Quebrada Blanca Phase 2 (QB2) project, inaugurated in October 2023, develops the deeper sulphide resource. A future expansion known as Quebrada Blanca Phase 3 (QB3) is under consideration, along with potential synergies with the nearby Collahuasi mine.

The Copper Hill Project covers a 35 square kilometre land package in a productive porphyry copper district in Arizona. Limited historical exploration was conducted in the 1960s and 1970s, which identified three large porphyry centres. Teck Resources has conducted more recent early-stage exploration work, including geochemistry, structural mapping, and both ground and airborne geophysics.

Teck Resources Limited is currently in the process of transferring its 100% ownership of the Copper Hill Project to a new company, Kay Copper Corp. This transaction is part of a non-binding letter of intent signed with Kodiak Copper Corp. and Kay Copper, and is expected to close in the third quarter of 2026. Upon completion, Teck Resources will hold a 28% ownership stake in Kay Copper.

approximately 3,000 direct and 1,000 indirect jobs during the construction phase, and 834 direct and 423 indirect jobs during the operational stage.

The Zafranal Project is an open-pit copper-gold mine in the Arequipa Region of Peru. It is currently in asset preservation mode, with a construction decision deferred to prioritize investments at the Quebrada Blanca mine. The project is in the exploration stage, with no construction or production activities having commenced.

Expected average annual production of 76,000 tonnes of copper and 29,000 ounces of gold. Forecasts include 126,000 tonnes of copper per year over the first five years of operation, with a previously targeted average of 133,000 tonnes of copper in concentrate during the first five years.

conventional concentration process. The processing plant is expected to have a capacity of between 64,000 and 80,000 tonnes per day.

conventional truck and shovel operations

At the end of 2023, Teck's total workforce was comprised of 3,115 women (24%) and 53% of the total workforce was unionised. Specific numbers for the Quebrada Blanca operational workforce are not detailed.

The Quebrada Blanca mine, operated by Compañía Minera Teck Quebrada Blanca S.A. (QBSA) with Teck Resources holding a 60% interest, is an open-pit copper and molybdenum operation in Chile's Tarapacá Region. The Quebrada Blanca Phase 2 (QB2) expansion achieved first copper production in March 2023 and was operating near design capacity by the end of 2023. The QBME (Mill Expansion) project is a proposed future expansion to increase concentrator capacity by approximately 50%, with a revised environmental permit application expected after QB2 ramp-up.

Production overview - 2023: copper 9600 t.

The QB2 expansion processes sulphide ore using conventional truck-and-shovel operations. Ore is fed to a primary gyratory crusher, then conveyed to a coarse ore stockpile before being fed to semi-autogenous grinding (SAG) mills. The process includes crushing, milling, bulk flotation, thickening, and filtering in a concentrator plant with a design capacity of 140,000 tonnes per day. A molybdenum plant was substantially completed in December 2023. The operation uses 100% desalinated seawater.

The mining fleet includes 28 autonomous Cat 794 AC electric drive trucks, each with a capacity of 291 tonnes. The primary loading units are 58.1 m³ ultra-class electric rope shovels. The existing fleet of 27 m³ hydraulic shovels (Komatsu PC5500) and 18 m³ front-end loaders (Komatsu WA1200-6) from the previous phase of operations also remain in service. The concentrator includes a 1,000 kW, 1,600 mm x 3,000 mm (63 x 118 inch) gyratory crusher. The plant also features semi-autogenous grinding (SAG) mills. A molybdenum plant was substantially completed in December 2023. Other infrastructure includes a remote Integrated Operations Centre (IOC) located in Santiago, a tailings management facility, a desalination plant at the port, and concentrate and water pipelines.

The Quebrada Blanca Mill Expansion (QBME) is a proposed future expansion of the Quebrada Blanca mining operation in Chile, aiming to increase the throughput of the existing processing plant by approximately 50% by adding a third grinding line. Teck Resources withdrew the environmental permit application in October 2023 for optimisation, with a revised application expected to add 12 months to the regulatory process. A sanction decision is not anticipated until after the full ramp-up and capability assessment of the existing Quebrada Blanca Phase 2 (QB2) asset is complete.

Ongoing operations support a workforce of approximately 1,500 direct jobs, with a major expansion project expected to add about 2,900 jobs during its construction phase.

The Highland Valley Copper Operations, wholly owned by Teck Resources, is Canada's largest open-pit copper mine, located in British Columbia, approximately 17 kilometres west of Logan Lake and 75 kilometres southwest of Kamloops. It produces copper and molybdenum concentrates, with silver and gold as by-products, and combines the historic Lornex, Bethlehem, and Highmont mines.

Recent copper production was 99,000 tonnes in 2023, 102,000 tonnes in 2024, and 127,000 tonnes in 2025.

Ore is processed through autogenous and semi-autogenous grinding and flotation to produce copper and molybdenum concentrates.

The mine uses conventional open-pit methods with electric shovels and haul trucks. Its fleet includes at least 35 Caterpillar 793F autonomous haulage trucks.

The Highland Valley Copper Mine Life Extension Project (HVC MLE) is a brownfield extension designed to prolong the mine's life from 2028 to 2046. This expansion, which received its Environmental Assessment Certificate in June 2025 and board approval in July 2025, commenced construction in August 2025. It involves extending existing pits and upgrading infrastructure, including conveying, grinding, and flotation systems. The project, with an estimated capital investment between C$2.1 billion and C$2.4 billion, is expected to sustain an average annual copper production of 132,000 tonnes. Fluor was awarded the contract for engineering, procurement, and integrated construction management services.

4,000 positions during the construction phase and 1,400 operational jobs once the mine is active.

The NuevaUnion Project is a significant undeveloped copper-gold-molybdenum asset located in the Huasco Province of the Atacama Region in Chile. It is a 50/50 joint venture between Canadian mining company Teck Resources Limited and the American Newmont Corporation. The project combines two separate deposits, the Relincho (copper-molybdenum) and La Fortuna (copper-gold), which are situated approximately 40 kilometres apart.

conventional open-pit mining operation. The initial development plan involves transporting ore from the La Fortuna deposit via a conveyor to a single-line mill and concentrator facility to be located at the Relincho site.

The Quebrada Blanca Phase 2 (QB2) expansion achieved first copper production in March 2023 and was inaugurated in October 2023. The expanded operation was expected to ramp up to full production by the end of 2023. A remote Integrated Operations Centre is located in Santiago.

The operation includes a concentrator plant with a production capacity of 140,000 tonnes-per-day. The process involves crushing, milling, bulk flotation, thickening and filtering to produce copper concentrate. The QB2 expansion develops the deeper sulphide resource underlying the original operation which mined a supergene orebody. The mine is the first in the Tarapacá Region to use 100% desalinated seawater for its production processes. The water is transported from a port-site desalination plant via pipeline. Copper concentrate is also transported by a 165-kilometre pipeline to the port facility for shipping. A molybdenum plant was expected to complete its ramp-up by the end of the second quarter of 2024.

The Quebrada Blanca Phase 2 (QB2) project is a significant expansion that represents the next phase of the mine. At full production, QB2 is expected to have an annual output of 316,000 tonnes of copper-equivalent for the first five full years. The current 27-year mine plan utilises only about 18% of the 2022 reserves and resources, which represents significant potential for further expansions.

The Kay Mine Project is Arizona Metals’ 100%-owned high-grade VMS copper-gold-zinc-silver-lead development project in Yavapai County, Arizona. The deposit has been defined from about 60 metres depth to at least 900 metres and remains open along strike and at depth. Its 2025 mineral resource estimate outlines 9.28 million tonnes in the Indicated category at 3.18% copper equivalent and 0.86 million tonnes in the Inferred category at 2.44% copper equivalent. The project benefits from road, power and water access, private and BLM land tenure, no royalties and a location within an established Arizona mining district. Current resource estimate: Indicated resource: 9.28 million tonnes grading 1.39 g/t gold, 27.6 g/t silver, 0.97% copper, 0.33% lead and 2.39% zinc, equal to 3.18% copper equivalent. Inferred resource: 0.86 million tonnes grading 1.06 g/t gold, 15.4 g/t silver, 0.87% copper, 0.20% lead and 1.68% zinc, equal to 2.44% copper equivalent. Contained metal — Indicated: Gold: 415 koz Silver: 8,253 koz Copper: 197.9 Mlb Lead: 67.3 Mlb Zinc: 490.1 Mlb Copper equivalent: 650.6 Mlb Contained metal — Inferred: Gold: 29 koz Silver: 423 koz Copper: 16.4 Mlb Lead: 3.8 Mlb Zinc: 31.8 Mlb Copper equivalent: 46.1 Mlb Mineralisation depth and expansion: Defined from about 60 metres depth to at least 900 metres, open at depth and along strike. Less than 10% of the prospective mineralised horizon has been drill-tested to date, according to the company.

Road, power and water access. The project is located in an established Arizona mining jurisdiction with year-round access and an available mining workforce.

The Tulsequah Chief Mine has been abandoned for over 60 years and has been leaching acid rock drainage into the Tulsequah River, a tributary of the Taku River. The Province of British Columbia is now leading clean-up and reclamation efforts. In September 2024, the B.C. Government, the Taku River Tlingit First Nation, and Teck signed a memorandum of understanding to collaborate on the site's clean-up. Since 2024, on-site work has included improving safe access, repairing infrastructure, stabilising parts of the underground workings using drones for surveys, cleaning up legacy waste like fuel drums, and expanding environmental monitoring. A water treatment plant built by Chieftain Metals was found to be non-functional. A draft remediation plan is targeted for 2026, with a final plan expected by 2028. Remediation completion is anticipated within the next 10 years. The mine's permit was cancelled by the chief inspector of mines on 22 March 2024.

360 (operations), 700 (construction)

The NewRange Copper Nickel Project, formerly known as NorthMet, is located in northeastern Minnesota. The project is a 50:50 joint venture between Teck Resources and PolyMet Mining Corp., which is a subsidiary of Glencore. The joint venture company is named NewRange Copper Nickel LLC. The project is currently in the permitting stage, which has been subject to delays and legal challenges. The Minnesota Department of Natural Resources has suspended proceedings on the project until August 2025 while the company studies potential changes to the project's design.

processing 32,000 tonnes of ore per day (Phase I)

refurbishment of the former LTV Steel Mining Company processing plant; new semi-autogenous grinding (SAG) mill, ball mill, and flotation circuit

new semi-autogenous grinding (SAG) mill, ball mill, flotation circuit

Phase II includes the construction and operation of a hydrometallurgical plant to further process nickel sulfide concentrates.

The project is expected to employ approximately 7,500 people during peak construction and create about 4,000 long-term jobs during its operational life. As of May 2025, there were nearly 1,000 employees on-site. A 2025 technical report outlined the peak mining workforce requirements.

First production was previously targeted for the end of 2028, but this timeline is now under review and likely to be extended. One report from late 2025 suggested first copper exports are expected in early 2029. Phase 1 is projected to produce 260,000 tonnes of copper and 300,000 ounces of gold annually. Phase 2 is expected to increase annual output to 400,000 tonnes of copper and 500,000 ounces of gold.

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 with a combined process capacity of 90 million tonnes per annum. The concentrate will initially be transported by road to Port Qasim, with plans for a pipeline to Gwadar Port in the future. A smelter is not initially planned.

A February 2025 technical report listed planned mining equipment including CAT 789 water trucks, CAT 993 cable reelers, SANDVIK DR412i production drill rigs, and SANDVIK DI650i pre-split drill rigs.

The reconstitution of the Reko Diq project was completed in December 2022. An Environmental and Social Impact Assessment (ESIA) for the project was completed in 2024 and approved by government authorities in early 2025. In early 2026, Barrick announced it was slowing development activity and extending a project review until mid-2027 due to an escalation of security risks in Pakistan and the region. This review will assess the security situation, capital requirements, project financing, scope, and timeline.

no permanent workforce for operating mine; up to 40 for exploration

The Libby Exploration Project, formerly the Montanore Project, is a 100% owned silver and copper exploration-stage project by Hecla Mining Company in Lincoln County, Montana, USA. Currently in the exploration and evaluation phase, a Plan of Operations for underground exploration has been submitted. Activities are planned for ~16 years to gather data for engineering and feasibility. The deposit is a stratabound sediment-hosted silver-copper type, with an Inferred Resource of 112.2 million tons as of Dec 2024, containing over 1.5 billion pounds of copper and 183 million ounces of silver.

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

First production from the mine is targeted for 2028. Over the life of the mine, the project is projected to produce 13.1 million tonnes of copper and 17.9 million ounces of gold.

The project is a truck-and-shovel open pit operation. It is planned to be constructed in two phases, with processing facilities that will produce a high-quality copper-gold concentrate. The combined processing capacity is expected to be around 80 million tonnes per annum. Phase 1 will have a processing capacity of 45 million tonnes per year, which will double to 90 million tonnes annually in Phase 2.

The project's development is planned in two phases. Phase 1 is expected to commence operations in 2028, with Phase 2 planned to begin by 2034.

The Kinskuch property, located in the Golden Triangle of British Columbia, was acquired by Dolly Varden Silver Corporation from Hecla Mining Company in May 2025. The acquisition was for $5 million, satisfied by the issuance of 1,351,963 common shares of Dolly Varden to Hecla. Hecla retains a 2% net smelter return royalty, of which Dolly Varden has a 50% buyback right for $5 million. The property is considered underexplored and includes the past-producing Esperanza mine. Historical work by Hecla focused on the "Illy" epithermal system. The acquisition increased Dolly Varden's Kitsault Valley Project area to approximately 77,000 hectares. The property is covered by a five-year Exploration Permit on both Nisga'a and Gitanyow Traditional Lands.

During its peak construction phase, the Reko Diq Project is expected to employ over 7,500 people, with approximately 4,000 long-term jobs created once the mine is in production.

The Reko Diq Project is a significant undeveloped copper-gold deposit located in the Chagai District of Balochistan, Pakistan. It is operated by the Canadian mining company Barrick Gold Corporation. As of early 2026, the project is under development, however, development activities have been slowed, and a project review has been extended to mid-2027 due to an escalation of security risks in the region. This is expected to impact the previously targeted first production date of late 2028.

The project is expected to produce 200,000 to 250,000 tonnes of copper per year.

The development is expected to occur in two phases, with a combined processing capacity of 90 million tonnes per annum. The initial phase is planned to process approximately 40 to 45 million tonnes of ore annually. The mine will produce a high-quality copper-gold concentrate.

Key equipment suppliers include Metso, Weir, and Komatsu.

The development is expected to occur in two phases.

expected to employ 7,500 people during peak construction and create 4,000 long-term jobs

Development activity has been slowed, and the project is under review until mid-2027 due to escalating security risks, assessing scope, timeline, capital requirements, and financing. Previously targeted first production by end of 2028 is under review, with anticipated significant capital budget increases.

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

The project will be a truck-and-shovel open pit operation. The processing facilities will produce a high-quality copper-gold concentrate. Mined rock will be crushed and ground before being fed into the process plant. Construction is planned in two phases with a combined process capacity of 90 million tonnes per annum.

During peak construction, the project is expected to employ over 7,500 people. Once in production, it is projected to create between 3,500 and 4,000 long-term jobs.

The project is a greenfield, open-pit mining operation. As of early 2026, Barrick has slowed development activity and is conducting a project review until mid-2027 due to escalating security risks in the region. This has led to an anticipated increase in the previously disclosed capital budget and a delay in the timeline, with the first production target of late 2028 no longer certain. The project is planned to be constructed in two phases. The Environmental and Social Impact Assessment (ESIA) for the project was approved by government authorities in early 2025. Fluor was selected as the lead engineering, procurement, and construction management (EPCM) partner.

The construction is planned in two phases with a combined process capacity of 90 million tonnes per annum. The initial phase is expected to produce 200-250 kilotonnes of copper per year. A potential expansion could increase copper production to 400 kilotonnes per year. Another estimate for annual production is 200,000 tonnes of copper and 250,000 ounces of gold. The project is expected to produce 700 kilotonnes of gold and copper concentrate annually for export.

The operation will be a truck-and-shovel open pit mine with processing facilities to produce a high-quality copper-gold concentrate.

approximately 512 people (as of 2024)

The Greens Creek Mine, operated by Hecla Mining Company, is an underground mine on Admiralty Island in the Tongass National Forest, approximately 18 miles southwest of Juneau, Alaska. It is one of the largest and lowest-cost primary silver mines in the world. The mine operates 24 hours a day, 365 days a year, producing about 2,300 tons of ore per day. The primary mining methods are cut-and-fill and long-hole stoping. In addition to silver, the mine produces zinc, gold, and lead.

Production overview - 2026: silver 2.2 Moz, gold 13000 oz; 2025: silver 8.7 Moz, gold 59349 oz, zinc 51.3 kt, lead 18.2 kt.

The operation uses flotation and gravity processes to recover silver, gold, lead, and zinc. Major facilities include the underground mine, an ore concentrating mill, a dry stacked tailings facility, a ship-loading facility, and camp facilities. Since 2009, hydropower has provided 77% of Greens Creek's energy needs. Metallurgical recoveries in 2025 were 79.3% for silver, 74% for gold, 82.6% for lead, and 88.8% for zinc. In the first quarter of 2026, Greens Creek achieved a record for underground backfill placement, placing nearly 164 thousand tons. Hecla is also evaluating the economic potential of developing a pyrite concentrate circuit at the mill to boost silver and gold recoveries.

In January 2026, the Federal Permitting Improvement Steering Council announced that the Greens Creek Surface Exploration Project had completed its federal permitting process. The U.S. Forest Service approved a five-year plan of operations for surface exploration to identify new mineralised targets for silver, gold, lead, and zinc, which is expected to extend the mine's life. Hecla plans to nearly double its 2025 investment in exploration in 2026, with a focus on Greens Creek among other sites. Capital investment at the mine is also directed towards the expansion of its tailings facility, which is expected to increase tailings capacity to 2045.