Giga Metals : Earnings Document

MANAGEMENT'S DISCUSSION AND ANALYSIS

The following management's discussion and analysis ("MD&A") for Giga Metals Corporation (the "Company") is for the year ending December 31, 2023 and includes information up to April 23, 2024 (the "Report Date"). The MD&A should be read in conjunction with the Company's audited financial statements and related notes to the financial statements for the year ended December 31, 2023. The referenced consolidated financial statements have been prepared in accordance with IFRS Accounting Standards ("IFRS") as issued by the International Accounting Standards Board. All amounts are expressed in Canadian dollars unless otherwise stated.

Forward-Looking Statements and Risk Notice

This MD&A is a review of the Company's operations and financial position as at and for the year ended December 31, 2023 and plans for the future based on facts and circumstances as of April 23, 2024. Except for statements of historical fact relating to the Company, including our 85% interest in the Turnagain Property, certain information contained herein constitutes forwarding-looking statements. When we discuss: mine plans; our costs and timing of current and proposed exploration; development; production and marketing; capital expenditures; cash flow; working capital requirements; and the requirement for additional capital; operations; revenue; margins and earnings; future prices of nickel and cobalt; foreign currency exchange rates; future accounting changes; or other things that have not yet happened in this review we are making statements considered to be forward-lookingstatements under Canadian and United States securities laws. We refer to them in this review as forward-lookinginformation. The forward-looking information in this review typically includes words and phrases about the future, such as: plan, expect, forecast, intend, anticipate, estimate, budget, scheduled, believe, may, could, would, might and will. We can give no assurance that the forward-looking information will prove to be accurate. It is based on a number of assumptions management believes to be reasonable, including but not limited to: the continued operation of the Company's operations, no material adverse change in the market price of commodities and exchange rates and such other assumptions and factors as set out herein. It is also subject to risks associated with our business, including but not limited to risk inherent in the mining and metals business; commodity price fluctuations and hedging; competition for mining properties; sale of products and future market access; mineral reserves and recovery estimates; currency fluctuations; interest rate risk; financing risk; environment risk; legal proceedings; and other risks that are set out in our annual information form and below. If our assumptions prove to be incorrect or risks materialize, our actual results and events may vary materially from what we currently expect as set out in this review. We recommend that you review our annual information form and this Management's Discussion and Analysis, which include a discussion of material risks that could cause actual results to differ materially from our current expectations. Forward- looking information is designed to help you understand management's current views of our near and longer term prospects, and it may not be appropriate for other purposes. We will not necessarily update this information unless we are required to be securities laws.

For additional risk factors relating to the Company, refer to the short-form base shelf prospectus filed on www.sedarplus.caon January 31, 2022.

Scientific and technical information disclosed in this document has been reviewed and approved by Greg Ross, P. Geo., and Lyle Trytten, P. Eng., both Qualified Persons consistent with National Instrument 43-

101 ("NI 43-101").

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Mitsubishi Corporation Transaction

On August 15, 2022, the Company announced that it had entered into a binding agreement with Mitsubishi Corporation ("MC") to form a new joint venture company, Hard Creek Nickel Corp. ("Hard Creek"), to jointly pursue the development of the Turnagain Nickel-Cobalt Project. The transaction closed on September 1, 2022.

Hard Creek issued 15% of its common shares to MC for cash consideration of $8,000,000 and 85% of its common shares to Giga Metals Corporation in exchange for all related assets and liabilities of the Turnagain Nickel-Cobalt Project. Pursuant to the terms of a shareholders' agreement governing Hard Creek, the Company, with support from MC, will operate the joint venture.

The $8,000,000 cash consideration was used to complete a Pre-Feasibility Study, which was completed and filed on October 23, 2023. Further expenditures in the joint venture will be split in accordance with the equity interests of the parties.

Overall Performance

The Company has an 85% interest in Hard Creek, which itself has a 100% interest in the Turnagain Nickel- Cobalt Project located in the Liard Mining Division in northern British Columbia, approximately 65 km east of Dease Lake. The Turnagain Nickel-Cobalt Project currently has 73 mineral claims with a total area of approximately 39,848 ha. Seventy-one of these claims form one block of contiguous claims totaling approximately 38,680 ha and have expiry dates ranging from August to December 2033. The Project currently also includes two non-contiguous claims totaling approximately 1,168 ha with expiry dates ranging from October 2024 to January 2025. These claims may be extended with future work credits and/or cash in lieu of work or allowed to lapse depending on strategic objectives.

The Turnagain project was not actively explored between 2011 and 2018 due to low nickel prices and difficult financial conditions. The price of nickel improved in 2017, and, during the third quarter of 2017, the Company completed equity financings allowing the Company to conduct an exploration program in the summer of 2018.

The Company started its 2018 exploration program in July with the commencement of archaeological and wildlife surveys and the arrival of drill rigs on site.

The 2018 field work program completed a total of 10,835 metres of core drilling in forty holes (hole numbers DDH18-267 to DDH18-306). On January 30, 2019, the Company announced analytical results from 38 of the 40 holes and the results for the remaining 2 holes were released on February 25, 2019.

The 2018 work program included:

• Two exploration holes totaling 1,119.8 metres in the platinum-enriched Attic Zone.
• Thirteen metallurgical infill holes totaling 3,073.0 metres within the Horsetrail and Northwest zones of the Turnagain deposit.
• Twenty-threeinfill holes totaling 5,866.9 metres, sited between the Horsetrail and Northwest zones to increase sample densities to allow for a reclassification of those portions of the deposit currently categorized as inferred resources to indicated resources.
• Two exploration holes totaling 775.1 metres in the MAG Zone roughly 5.6 kilometres northwest of Horsetrail deposit.

Refer to the January 30, 2019 and February 25, 2019 news releases for details of the analytical results. The analytical results reported demonstrate the continuity of mineralization in the Horsetrail and Northwest zones.

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The Company was continuing to advance the project through ongoing:

• Consultation with the Tahltan First Nation and Kaska Dena communities.
• Geotechnical, environmental and archaeological studies, including the establishment of remote water and wildlife monitoring stations and the re-establishment of surface and groundwater monitoring programs.
• Metallurgical optimization and the Turnagain Mine project design engineering studies.

During July 2018 the Company closed the sale of a 2% Net Smelter Return ("NSR") royalty on all future nickel and cobalt production from the Turnagain Nickel-Cobalt Project to Cobalt 27 Capital Corp. ("Cobalt 27" now Nickel 28 Capital Corp.) for consideration of US$1,000,000 in cash and 1,125,000 Cobalt 27 common shares at $7.40 per share for a fair value of $8,325,000.

In spring and summer of 2019, the Company began metallurgical test work, including comminution, flow sheet development, and variability testing. Additionally, field work began for geotechnical and geochemical investigations in support of low-grade stockpile and waste rock storage design. Environmental baseline data continues to be collected.

In 2019 Natural Resources Canada ("NRCan") agreed to be part of a consortium of government agencies and industry partners, including GIGA, that have agreed to fund a research initiative investigating carbon dioxide (CO2) sequestration in silicate mine residue, including ultramafic residue from mineral deposits such as GIGA's Turnagain nickel-cobalt deposit. A total of $3.5 million was committed to the project, including $2 million from NRCan with the balance from other government geoscience agencies and from industry. More than a decade of research by project lead Dr. Greg Dipple has shown that silicate mineral residue, when exposed to the atmosphere, absorbs CO2 and converts it to carbonate minerals, and the CO2 would remain locked in the carbonates over geological time scales. There is a real possibility that the Turnagain project, if developed into a mine, could achieve our goal of being carbon neutral. Refer to the news release for further details. An update on Dr. Dipple's work was included in an August 4, 2020 news release. On June 1, 2021, the Company announced that test work conducted on Turnagain mineralized material at the University of British Columbia has demonstrated significant mineral sequestration of CO2.

In September 2019 the Company announced an updated NI 43-101 mineral resource estimate based on the additional 36 infill holes drilled in 2018 in the areas of the conceptual open pit described in the Preliminary Economic Assessment dated December, 2011 by AMC Consultants of Vancouver, B.C., and also based on updated geological modeling supported by core logs, rock geochemistry, mapping, alteration modeling and other information. The updated resource estimate increased Measured plus Indicated resources at Turnagain by 24% to 1.07 billion tonnes, while contained nickel increased by 28.3% to 5.2 billion pounds.

On October 28, 2020, the Company announced the results of an updated Preliminary Economic Assessment (the "2020 PEA") for the production of high-grade nickel concentrate from the Turnagain Nickel Deposit. Refer to the news release dated October 28, 2020 for details. The NI 43-101 technical report for the 2020 PEA was filed on www.sedarplus.ca on November 20, 2020 and on our website at www.gigametals.com. A subsequent amendment to the NI 43-101 technical report for the 2020 PEA was filed on www.sedarplus.ca on February 22, 2021 and on Giga's website.

During the summer and fall of 2020, we did not conduct significant field work at the Turnagain project and instead focused on metallurgy and engineering. Additional fieldwork resumed at the Turnagain project in early 2021 to gather the site data necessary to advance the project to Pre-Feasibility. In March 2021, the Company increased the reclamation bonds with the Ministry of Energy, Mines and Petroleum Resources from $232,000 to $424,000 in advance of planned fieldwork.

An internal study was conducted comparing the economics, technical risk and environmental impacts of the Company's Turnagain project with one operating and a basket of prospective High Temperature Acid Leach ("HPAL") projects and the results of that study were summarized in a press release on November 3, 2020.

The Company concluded its 2021 field program at Turnagain in October, having completed 6,295 metres of core drilling in 15 drill holes. In addition to collecting resource and geological information, 6 holes were also utilized to collect geotechnical data for pit wall design and to install piezometers for groundwater

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modeling. The Company further conducted 8,400 metres of seismic refraction survey for tailings storage facility design. Due to labour shortages in 2021, the Company was unable to complete all the planned work and data collection for a Pre-Feasibility Study. The Company conducted a work program in 2022 to complete this data acquisition; which included geotechnical drilling in the area of the potential Tailings Management Facility and excavator test pits and geotechnical drilling for stockpile and waste storage designs.

On May 19, 2022, the Company released assay results from its 15-hole 2021 work program and reported on the collection of geotechnical and hydrogeological data and installations, and the completion and interpretation of a seismic refraction survey. These works are expected to move Inferred resources into Indicated resources and to provide valuable data with which to advance project engineering.

On August 3, 2022, the Company reported that it had completed its 2022 field work program, consisting of five helicopter-supported combination 4" Sonic/HQ geotechnical holes totaling 415 metres within the proposed tailings storage main and saddle dam alignments, and 18 excavator test pits within the proposed stockpile and waste storage areas in support of PFS-level mine engineering design.

On October 27, 2022, an updated NI 43-101 mineral resource estimate was announced, based on the additional 15 drill holes totaling 6,295 metres drilled in 2021 that were drilled for resource expansion and resource classification update in addition to supplying geotechnical data. Refer to the October 27, 2022 and November 1, 2022 news releases for additional details, as well as the Turnagain Nickel-Cobalt Project section below.

In May 2023, Hard Creek acquired all the camp equipment at the Turnagain Nickel-Cobalt Project from a supplier that had been renting the equipment to the Company. The acquisition cost was $695,500. The description of goods included shelters, generators, kitchen equipment, plumbing fixtures, appliances, heaters and other items.

On September 22, 2023, the Company announced the results of a Pre-Feasibility Study ("PFS") prepared in accordance with NI 43-101 for the Turnagain Nickel-Cobalt Project. Highlights of the PFS are as follows:

• Large Long-lifeMine: Annual production averaging 37,288 t/y Ni+Co in concentrate over the nominal full operating rate period (Y3 - 28) based on a 30-year project life with an extremely low strip ratio of 0.4 tonnes waster per tonne ore.
• Positive Economics: Pre-tax IRR and NPV of 11.1% and US$717 million (7% discount rate) and post-tax IRR and NPV of 11.4% and US$574 mullion at long-term nickel price of US$9.75/lb, with 78% payability for nickel in concentrate.
• High-gradeConcentrate: Nickel concentrate averaging 18% Ni and 1.1% Co with low impurities.
• Low-carbonOperation: Scope 1+2 carbon intensity of <1.8 tonnes of CO2 per tonne of Ni in concentrate.
• Site Operating Costs: US$3.85/lb Ni in concentrate before byproduct credits at mine gate (Y3 - 28 operating period).

Refer to the news releases dated September 22, 2023 and October 24, 2023 for additional details. The PFS was filed on www.sedarplus.ca on October 23, 2023 and on our website at www.gigametals.com.

Expenditures during the year ended December 31, 2023 included geological and engineering services and metallurgy in connection with the PFS.

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The Turnagain Project hosts the Horsetrail nickel-cobalt deposit, among the world's largest undeveloped nickel-cobalt sulphide deposits, located in British Columbia, Canada. There is a recent September 22, 2023 Pre-Feasibility Study prepared in accordance with NI 43-101. Turnagain is owned by Hard Creek Nickel Corp, a corporation owned by Giga Metals Corporation (85%) and Mitsubishi Corporation (15%).

Pre-Feasibility Study

On October 23, 2023, the Company filed the Pre-Feasibility Study on www.sedarplus.ca and on the Company's website. Refer to the news releases dated September 22, 2023 and October 24, 2023 for additional details.

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The PFS builds on significant metallurgical and engineering studies and confirms the ability of Turnagain to produce high-quality nickel concentrate. Nickel concentrate is expected to be in greater demand for production of nickel products such as mixed hydroxide precipitate ("MHP"), mixed sulphide precipitate ("MSP"), high nickel content smelter matte or other forms of Class I products. MHP and Class I nickel demand is growing for the electric vehicle (EV) market, particularly materials sourced in a socially and environmentally responsible manner.

The PFS has been led and prepared by Tetra Tech Canada Inc. ("Tetra Tech"), a global consulting and engineering firm with substantial expertise in the mining sector, along with input from industry expert consultants (see Qualified Persons list at end of September 22, 2023 news release). The Company's primary driver for this update was to deliver a reliable and comprehensive PFS incorporating all project- related components for discussion with potential strategic partners and communities, targeting improvement opportunities, and serving as a basis for future engineering and environmental studies. All currencies are in US$ using an exchange rate of US$1.00 = C$1.30 and all production and cost data are typical full operating year (average of years 3 - 28) unless otherwise indicated.

For readers to fully understand the information in this MD&A, they should read the Technical Report in its entirety, including all qualifications, assumptions and exclusions that relate to the PFS. The Technical Report is intended to be read as a whole, and sections should not be read or relied upon out of context.

Summary

The PFS demonstrates a long-life,large-scale project that will deliver high-grade nickel sulphide concentrate with no significant deleterious impurities, into commercially proven processes such as pyrometallurgical smelters or hydrometallurgical refining using pressure oxidation facilities. The project has notable responsible mining characteristics beyond the low-carbon production including the following.

• Sequestration of CO2 through naturally occurring mineral carbonation, transforming the Tailings
  Management Facility ("TMF") into a permanent carbon mineralization facility.
• Safe and efficient tailings storage using centreline and downstream tailings dams in sub-aerial valley impoundment.
• Near-neutralwater balance.
• Located in a well-regulated and experienced mining jurisdiction that has adopted First Nations' rights to achieve informed consent during the permitting process.

The key production and cost outcomes of the PFS are provided in the table below. Typical values are annual or weight-averaged by processing plant feed or nickel production, as appropriate. Site operating costs include all direct operating costs and G&A. Net operating costs are inclusive of transport to the destination port (assumed Asia) and net payment for contained cobalt and platinum-group elements byproducts after typical deductions and charges. Sustaining capital costs include ongoing TMF development, mining equipment, plant and infrastructure capital equipment replacement, and closure- related costs, net of salvage value.

At projected long-term metals prices of US$21,500/t Ni (US$9.75/lb) and US$58,500/t Co (US$26.54/lb) and smelter terms of 78% and 50% payment, respectively, Turnagain is expected to have a pre-tax IRR and NPV of 11.1% and US$717M, and a post-tax IRR and NPV of 11.4% and US$574M, respectively. The three price cases below are 7%, 19%, and 32% below the 20-yearinflation-adjusted average price of US$26,700/t Ni, respectively. No price consideration related to environmental, social and governance ("ESG") metrics or ally-shoring aspects have been applied. Other sensitivity parameters have a smaller effect.

Note: The post-tax IRR is higher than the pre-tax value in some cases due to the impact of the Canadian refundable Clean Technology Manufacturing Investment Tax Credit.

PFS Major Components

Geology and Mineralogy

The Turnagain Project is hosted in the Turnagain ultramafic complex, with predominantly dunite- serpentinite-wehrlite mineralization. Showings of semi-massive and massive sulphides have been identified by work to date. These semi-massive and massive zones, plus broad zones of disseminated sulphides, are generally hosted by dunite and wehrlite near the southern and eastern margins of the ultramafic body. Primary sulphide minerals consist of pyrrhotite and pentlandite with minor chalcopyrite. Interstitial and blebby sulphides, with grain sizes ranging from 1 to 4 mm, are evident in widespread disseminated zones seen in drill cores.

Mineral Resource Estimate

The mineral resource released in October 2022 has been updated through revised modeling. The PFS mineral resource is shown below. This resource estimate includes the potentially mineable Horsetrail- Northwest-Duffy and Hatzl zones (north and south of Turnagain River, respectively) and excludes the resources located under the Turnagain River and within an assumed ecological offset boundary. Approximately 95% of the Measured and Indicated Resources lie in the Horsetrail-Northwest-Duffy zones north of the Turnagain River that are the focus of the current mine plan.

Turnagain Nickel-Cobalt Project Mineral Resource Summary

1. All mineral resources have been estimated in accordance with Canadian Institute of Mining and
   Metallurgy and Petroleum ("CIM") definitions, as required under NI 43-101.
2. Mineral resources are reported in relation to a conceptual pit shell in order to demonstrate reasonable expectation of eventual economic extraction, as required under NI 43-101; mineralization lying outside of these pit shells is not reported as a mineral resource. Mineral resources are not mineral reserves and do not have demonstrated economic viability.
3. Open pit mineral resources are reported at a cut-off grade of 0.1% Ni. Cut-off grades are based on nickel price of US$9.00 per pound, nickel recoveries of 60%, mineralized material and waste mining costs of US$2.80, along with milling, processing and G&A costs of US$7.20.

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1. Inferred mineral resources are considered too speculative geologically to have economic considerations applied to them that would enable them to be categorized as mineral reserves. However, it is reasonably expected that the majority of inferred mineral resources could be upgraded to indicated.
2. Due to rounding, numbers presented may not add up precisely to the totals provided and percentages may not precisely reflect absolute figures.

The mineral resources are contained in a large, contiguous, near-surface deposit amenable to large-scaleopen-pit mining techniques. This mineral resource is based on 254 Turnagain area drill holes completed from 2002 through 2021 including both resource and geotechnical drill holes in the ultramafic intrusive.

Mineral Reserves

Mineral reserves have been determined by Tetra Tech Canada Inc. ("Tetra Tech") based on development of optimized pits following geotechnical guidance from BGC Engineering. Pit optimization was done using the Lerchs-Grossman optimizer in DatamineTM, with PFS metallurgical recovery algorithms and mining, process, G&A, and concentrate shipping and marketing costs. A sustaining capital allowance was added to ensure that the optimized pit respected the cash flow considerations of regular mining equipment replacement and tailings management construction. An offset was applied to the Turnagain River boundary considering modelled flood scenarios for both environmental preservation and infrastructure integrity.

The ultimate pit was developed from optimization of the net present value for nested cone shells respecting the physical and economic constraints including consideration of pit road widths and angles for the recommended mining equipment.

Internal dilution to the large, disseminated ore body is modeled into the block model. Additional dilution and losses have been considered as a 2-metre loss of ore and 2-metre inclusion of waste at the ore-waste interfaces. An additional 1% mining loss was included to account for ore unmined, spilled, and improperly delivered to waste.

The Proven and Probable Mineral Reserves are given below. The mineral resources in the Hatzl zone have not been included in the mine plan and Reserves.

Turnagain Nickel-Cobalt Project Mineral Reserve Summary

1. The Mineral Reserve estimates were prepared with reference to the 2014 Canadian Institute of Mining, Metallurgy and Petroleum (CIM) Definition Standards (2014 CIM Definition Standards) and the 2019 CIM Best Practice Guidelines.
2. Reserves estimated assuming open pit mining methods.
3. Reserves are reported on a dry in-situ basis.
4. Reserves are based on a nickel price of US$21,500/t, cobalt price of US$58,500/t, ore mining cost of US$2.24/t mined, waste mining cost US$2.41/t mined, mining sustaining capital of US$0.57/t mined, milling costs of $5.35/t ore feed to process plant, TMF sustaining capital of US$0.70/t ore feed, and G&A cost of US$0.76/t ore feed.
5. Mineral Reserves are mined tonnes and grade including consideration for a 2-m dilution width between ore-waste contact and 1% mining losses.
6. Ore-wastecut-off was based on US$6.63/t of NSR.

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Metallurgy

Numerous phases of testing have been conducted on Turnagain samples over the past two decades. Since 2011, work has focused on the production of high-grade nickel sulphide concentrates. More recent work has been conducted on samples from throughout the Horsetrail and Northwest zones which are the focus of the current mine plan. A significant geometallurgical testwork campaign was concluded in 2023, featuring 70 samples of different lithologies, grades, and locations comprising materials representing waste through a range of ore qualities.

Comminution

Samples from the Turnagain deposit have undergone extensive small-scale comminution testing including crushing, semi-autogenous grinding ("SAG"), high-pressure grinding roll ("HPGR") piston press testing, milling (Bond ball and rod), and abrasion index testing. Turnagain samples have also been processed successfully through a pilot-scale HPGR unit at the NBK Institute of Mining Engineering, University of British Columbia, Vancouver, BC. Turnagain ore is hard and resistant to SAG milling but is amenable to HPGR crushing making this an attractive comminution technology for the project. The HPGR pilot plant testing showed good results at low operating pressure and power consumption with negligible dust generation.

Mineralogy

The host rock is comprised primarily of serpentine, olivine, and clinopyroxene. The full geometallurgical sampling campaign showed average values of 53% serpentine, 30% olivine, and 2.2% pyroxenes. Ratios of serpentine to olivine vary across the deposit, with the total of the two dominant minerals typically 80- 90%. Talc was essentially absent from about 95% of the samples analyzed, with the median content <0.1%.

Nickel occurs in both sulphide and non-sulphide form, with an average 67% of the nickel in the sulphide form. The fraction of nickel in the sulphide form as well as the grain size and degree of liberation is related to the sulphur content of the host rocks at lower sulphur levels, above which the relationships are weak. More than 99% of the sulphide nickel is hosted in nickel sulphide minerals (pentlandite, finely disseminated nickel sulphides, millerite, and heazlewoodite), with pyrrhotite hosting less than 1% of the nickel. The variability in nickel deportment between sulphide and non-sulphide forms is the primary driver behind nickel recovery to concentrate.

Mineral Recovery

The Turnagain ore is amenable to simple froth flotation, generally yielding high recoveries of the liberated sulphide minerals to high-grade concentrates. The flotation flowsheet adopted for this study includes grinding to 80% passing 80 µm followed by rougher, cleaner, and cleaner-scavenger flotation. Reagents are simple and conventional for nickel flotation, including a collector, dispersant, and frother. Flotation is conducted at natural pH, avoiding the use of pH-control chemicals in the flotation circuit. High selectivity has been achieved between pentlandite and pyrrhotite, and combined with high gangue rejection, high- grade nickel concentrates are consistently achieved.

The geometallurgical program completed for the PFS has provided significant de-risking by developing more precise recovery algorithms for the Turnagain minerals. Flotation recovery from all samples has been well correlated with the ratio of measured sulphide nickel to total nickel. The ability of a single algorithm to predict recovery with high accuracy is a significant achievement for the project.

Mining

The Turnagain open-pit deposit will be developed using large haul trucks (227 t capacity), loaders, and electric shovels to minimize unit costs. Proven trolley-assist technology and autonomous haulage technology have been selected for reduced total costs and environmental footprint. The mining operations are scheduled for a 28-year mine production period to support a 30-year processing plant operating period, and include the Horsetrail, Northwest, and Duffy mineralized areas (collectively, the Horsetrail zone). The orebody is mined as a single main pit with five pushback phases through the life of mine and a small satellite pit for the Duffy zone. Overall main pit dimensions are approximately 2 km x 1.5 km.

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Turnagain Ultimate Pit Design - Oblique View

Source: Tetra Tech

The mine plan will deliver an annual processing plant feed rate of 32.85 Mt/y (90 kt/d) after the installation of the second processing train in Year 1. The resource will be selectively mined with low-grade materials placed on a low-grade ore stockpile (LGS) for later recovery. The maximum low-grade ore stockpile size has been reduced by 82% from the 2020 Preliminary Economic Assessment to 34 Mt, which represents an approach that accounts for regulatory expectations to minimize stockpiling as well as practical mining operations. The rate of mining (total material) by pushback is shown in the figure below.

Turnagain Mining Plan

Source: Tetra Tech

The Turnagain deposit has a very low strip ratio, averaging 0.23 over the first 10 years of mine life and 0.41 life-of-mine. This includes 53 Mt of Inferred Resources which are classified as waste. This low strip ratio reduces mine size, operating and capital costs, and associated environmental impacts. Waste rock and low-grade stockpile ore will be placed in dedicated facilities located near the mine.

Processing

Processing of Turnagain ore is conventional. The processing plant (see simplified process flow diagram below) will consist of the following.

• A primary crusher followed by two trains of closed-circuit secondary crushing and HPGRs.
• Two grinding trains, each comprising two closed-circuit ball mills in series.
• Two rougher flotation trains, each comprising two banks of rougher cells.
• Two trains of three-stage cleaning circuits plus cleaner-scavenger flotation.
• Concentrate thickening and 2 trains of pressure filtration.
• Associated utility and reagent systems.

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