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Assets

Reserves and Resources

Mineral reserves and resources effective December 31, 2024

Note: Mineral Resources are inclusive of Mineral Reserves; all $ values in USD.
Abbreviations & Conversions: koz = 1,000 troy ounces, t = tonne (1,000 kilograms), kt = 1,000 tonnes, ton = short tons (0.9072 tonnes = 1 ton), ktons = 1,000 tons, Au = gold, Ag = silver, AuEq = gold equivalent, g/t = grams per tonne, oz/ton = ounces per ton.

(a) Florida Canyon Mine

Notes to Mineral Reserves

  1. Mineral reserves estimate has been converted into metric tonnes from short tons using a factor of 0.9072.
  2. Mineral reserves are reported at the point of delivery to the process plant, using the 2014 CIM Definition Standards, with an effective date of December 31, 2023. The qualified person as defined under National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”) for the estimate is Ms. Terre Lane, MMSA QP, a Global Resource Engineering, Ltd. employee.
  3. Mineral reserves are constrained within an open pit design that uses the following assumptions: gold price of US$1,800/oz considering only oxide material; gold recoveries varied by deposit and ore type, ranging from 45% to 64%; reference mining cost of $2.74/t mined in-situ and $2.08/t mined fill; processing cost of $4.97/t processed for oxide crushed material and $2.67/t for oxide run-of-mine (“ROM”) material; G&A costs of $1.20/t ore processed; treatment and refining costs of $6.57/oz gold recoverable; royalty costs of $88.00/oz gold recoverable; and pit slope inter-ramp angles ranged from 38–42° for rock and 30° for alluvium / fill.
  4. Mineral reserves are reported at a cut-off grade ranging from 0.13 g/t to 0.20 g/t.
  5. Mineral reserves include a stockpile of 1,934 kt at an average grade of 0.19 g/t and total contained gold of 11.57 koz.
  6. Mineral reserves include Heap Leach Inventory of 3,548 kt at an average grade of 0.29 g/t and total contained gold of 32.58 koz.
  7. Numbers have been rounded and may not sum.

Notes to Mineral Resources

  1. Mineral resources estimate has been converted into metric tonnes from short tons using a factor of 0.9072.
  2. Mineral resources are reported, using the 2014 CIM Definition Standards, with an effective date of December 31, 2023. The qualified person as defined under NI 43-101 for the estimate is Ms. Terre Lane, MMSA QP, a Global Resource Engineering, Ltd. employee.
  3. Mineral resources are reported inclusive of those mineral resources converted to mineral reserves. Mineral resources that are not mineral reserves do not have demonstrated economic viability.
  4. Mineral resources are constrained within a conceptual open pit shell that uses the following assumptions: gold price of US$1,800/oz; gold recoveries ranging from 45% to 64% for oxides and 80% for sulfides; reference mining cost of $2.74/t mined in-situ and $2.08/t mined fill; processing cost of $4.97/t processed for oxide crushed material and $2.67/t processed for oxide ROM material; processing cost of $23.15/t processed for sulfide material; general and administrative costs of $1.20/t processed; treatment and refining costs of $6.57/oz Au recoverable; royalty of $88.00/oz Au recoverable, and pit slope overall angles ranging from 30–36°.
  5. Mineral resources are reported at a cut-off grade ranging from 0.13 g/t to 0.20 g/t for oxides and is 0.56 g/t for sulfides.
  6. Mineral resources include a stockpile of 1,934 kt at an average grade of 0.19 g/t and total contained gold of 11.57 koz.
  7. Mineral resources include Heap Leach Inventory of 3,548 kt at an average grade of 0.29 g/t and total contained gold of 32.58 koz.
  8. Numbers have been rounded and may not sum.

(b) DeLamar Project

Notes to Mineral Reserves

  1. All estimates of mineral reserves have been prepared in accordance with NI 43-101 and are included within the current measured and indicated mineral resources.
  2. Thomas L. Dyer, P.E. for RESPEC, in Reno, Nevada, is a qualified person as defined in NI 43-101, and is responsible for reporting proven and probable mineral reserves for the DeLamar Project. Mr. Dyer is independent of Integra.
  3. Mineral reserves are based on prices of $1,650 per ounce Au and $21.00 per ounce Ag. The reserves were defined based on pit designs that were created to follow optimized pit shells created in Whittle. Pit designs followed pit slope recommendations provided by RESPEC.
  4. Reserves are reported using block value cutoff grades representing the cost of processing:
    1. Florida Mountain oxide leach cutoff grade value of $3.55/t.
    2. Florida Mountain mixed leach cutoff grade value of $4.20/t.
    3. Florida Mountain non-oxide mill cutoff grade value of $10.35/t.
    4. DeLamar oxide leach cutoff grade value of $3.65/t
    5. DeLamar mixed leach cutoff grade value of $4.65/t.
    6. DeLamar non-oxide mill cutoff grade value of $15.00/t.
  5. The mineral reserves point of reference is the point where is material is fed into the crusher.
  6. The effective date of the mineral reserves estimate is January 24, 2022.
  7. All ounces reported herein represent troy ounces, “g/t Au” represents grams per gold tonne and “g/t Ag” represents grams per silver tonne.
  8. Columns may not sum due to rounding.
  9. The estimate of mineral reserves may be materially affected by geology, environment, permitting, legal, title, taxation, sociopolitical, marketing, or other relevant issues.
  10. Energy prices of US$2.50 per gallon of diesel and $0.065 per kWh were used.
  11. See NI 43-101 technical report titled: “Technical Report for the DeLamar and Florida Mountain Gold-Silver project, Owyhee County, Idaho, USA”, dated October 31, 2023 with an effective date of August 25, 2023 (the “DeLamar Technical Report”), available under Integra’s SEDAR+ profile at www.sedarplus.ca and EDGAR profile at https://www.sec.gov.

Notes to Mineral Resources

  1. Mineral resources that are not mineral reserves do not have demonstrated economic viability.
  2. Michael M. Gustin, C.P.G. and Principal Consultant for RESPEC, is a qualified person as defined in NI 43-101, and is responsible for reporting mineral resources for the DeLamar Project. Mr. Gustin is independent of Integra.
  3. In-situ oxide and mixed and all stockpile mineral resources are reported at a 0.17 and 0.1 g/t AuEq cut-off, respectively, in consideration of potential open-pit mining and heap-leach processing.
  4. Non-oxide mineral resources are reported at a 0.3 g/t AuEq cut-off at DeLamar and 0.2 g/t AuEq at Florida Mountain in consideration of potential open pit mining and grinding, flotation, ultra-fine regrind of concentrates, and either Albion or agitated cyanide-leaching of the reground concentrates.
  5. The mineral resources are constrained by pit optimizations.
  6. Gold equivalent grades were calculated using the metal prices and recoveries presented in Table 14.18 and Table 14.19 from the DeLamar Technical Report.
  7. Rounding as required by reporting guidelines may result in apparent discrepancies between tonnes, grades, and contained metal content.
  8. The effective date of the mineral resources is August 25, 2023.
  9. The estimate of mineral resources may be materially affected by geology, environment, permitting, legal, title, taxation, sociopolitical, marketing, or other relevant issues.
  10. See NI 43-101 technical report titled: “Technical Report for the DeLamar and Florida Mountain Gold-Silver project, Owyhee County, Idaho, USA”, dated October 31, 2023 with an effective date of August 25, 2023, available under Integra’s SEDAR+ profile at www.sedarplus.ca and EDGAR profile at https://www.sec.gov.

(c) Nevada North Project

Notes to Mineral Resources

  1. Mineral resources that are not mineral reserves do not have demonstrated economic viability.
  2. William Lewis, P.Geo, and Alan S J San Martin, AusIMM(CP), of Micon International Limited have reviewed and validated the mineral resource estimate for Wildcat & Mountain View, respectively. Both are independent qualified persons as defined in NI 43-101.
  3. The Wildcat Deposit estimate is reported for an open-pit mining scenario, based upon reasonable assumptions. The cut-off grade of 0.15 g/t Au was calculated using a gold price of US$1,800/oz, mining costs of US$2.4/t, processing cost of US$3.7/t, G&A costs of US$0.5/t, and metallurgical gold recoveries varying from 73.0% to 52.0% and silver recoveries of 18%. An average bulk density of 2.6 g/cm3 was assigned to all mineralized rock types. The Inverse Distance cubed interpolation was used with a parent block size of 15.24 m x 15.24 m x 9.144 m.
  4. The Mountain View Deposit estimate is reported for an open-pit mining scenario, based upon reasonable assumptions. The cut-off grade of 0.15 g/t Au was calculated using a gold price of US$1,800/oz, mining costs of US$1.67/t to US$2.27/t, processing cost of US$3.1/t, G&A costs of US$0.4/t, and metallurgical gold recoveries varying from 30.0% to 86.0% with a silver recovery of 20%. An average bulk density of 2.6 g/cm³ was assigned to all mineralized rock types. Inverse Distance cubed interpolation was used with a parent block size of 7.62 m x 7.62 m x 6.10 m. Rounding as required by reporting guidelines may result in apparent discrepancies between tonnes, grades, and contained metal content.
  5. Rounding as required by reporting guidelines may result in apparent discrepancies between tonnes, grades, and contained metal content.
  6. The estimate of mineral resources may be materially affected by geology, environment, permitting, legal, title, taxation, sociopolitical, marketing, or other relevant issues.
  7. Neither Integra Resources Corp.’s nor Micon’s qualified person is aware of any known environmental, permitting, legal, title-related, taxation, socio-political, marketing, or other relevant issue that could materially affect the mineral resource estimate other than any information already disclosed in the Nevada North Report.
  8. See NI 43-101 technical report titled: “Technical Report Preliminary Economic Assessment for the Wildcat & Mountain View Projects, Pershing and Washoe Counties, Nevada, USA”, dated July 30, 2023, with an effective date of June 28, 2023 (“Nevada North Report”), available under Integra’s SEDAR+ profile at www.sedarplus.ca and EDGAR profile at https://www.sec.gov
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