Mr. Jason Kosec reports

INTEGRA SUBMITS DRAFT MINE PLAN OF OPERATIONS FOR THE DELAMAR PROJECT

Integra Resources Corp. has submitted the draft mine plan of operations (MPO) to the U.S. Bureau of Land Management (BLM) for the DeLamar and Florida Mountain project located in southwestern Idaho.

MPO highlights:

• The MPO is the culmination of over three years of environmental baseline studies, initial engineering design, and detailed description of mining and reclamation activities proposed for DeLamar.
  • The substantive MPO document was compiled over the last six months and allows the company to initiate the draft environmental impact statement (DEIS) process and begin work on the ancillary permits necessary to bring DeLamar to a production decision.
  • The MPO submittal will initiate the BLM's review process, per the United States Code of Federal Regulations Title 43 Subpart 3809, allowing the BLM to make a completeness determination and initiate the National Environmental Policy Act (NEPA) process, expected to begin in mid-2024.
• The MPO includes information derived from various baseline studies completed between 2020 and 2023, including:
  • Wildlife;
  • Vegetation;
  • Soils;
  • Air quality;
  • Cultural resources;
  • Wetlands, seeps and springs;
  • Aquatic resources;
  • Surface water and groundwater sampling, analysis and hydrologic studies;
  • Geochemistry.
• The submission of the MPO signifies a major step forward in the mine permitting process as it will utilize information obtained through the baseline studies to establish existing baseline conditions at the DeLamar site to characterize potential impacts for the proposed mine action.

Integra's president, chief executive officer and director, Jason Kosec, commented: "We are incredibly proud of the team at Integra for the submission of the MPO for DeLamar. This not only represents a critical milestone in the advancement of the project, but also sets Integra apart from its peers, being one of only a few development companies in the western U.S. with a project entering the NEPA permitting process. Two thousand twenty-three marks a pivotal and successful year for Integra with the completion of the merger with Millennial Precious Metals Corp., announcing the maiden preliminary economic assessment for Wildcat and Mountain View in Nevada, filing the updated mineral resource estimate at DeLamar, including the stockpiles, and finally the submission of the MPO for DeLamar. These achievements continue to strengthen Integra's position in the Great basin as a multiasset developer with a pathway to becoming a leading U.S.-focused gold and silver producer."

Mine plan of operations

Integra is dedicated to responsible mine planning that focuses on water quality and quantity, biodiversity preservation, and community considerations. The submission of the MPO to the BLM is the first major derisking event in the mine permitting process and demonstrates the company's commitment to advancing DeLamar toward a production decision. The MPO is an integral part of the NEPA process as it marks the formal start of engagement with all co-operating governmental agencies, stakeholders and the general public. The NEPA process will cover in-detail project scoping, environmental impact analysis, public comment periods and agency co-ordination. The detailed assessment conducted during this process ensures a comprehensive understanding of the project's potential impact on the environment and surrounding communities.

The MPO includes preliminary engineering and site design to define pit layout, heap leach location, development rock storage facility design and related sequencing. In addition, the MPO includes placement of ancillary facilities, incorporating access roads, power generation, primary crushing and processing. Integra's engineering team has also completed multiple studies and drill programs over the last three years to support the MPO which include geotechnical drilling, heap leach design, material and water balance details, cover design, clay resource estimates, Kuz-Ram blast fragmentation study, updated mine plans, and detailed power studies, among others.

Integra completed each of the baseline studies within the proposed outline of the mine features and access roads in 2023 to support the MPO. The completed list of baseline studies was executed by the consultants noted herein.

In addition to the completed studies, geochemical characterization of encountered pit lithology and hydrogeologic modelling studies (including fate and transport modelling) have been under way since 2022. These studies will also be used to further develop the reclamation and closure plan at DeLamar.

Next steps

During the MPO review process by the BLM, the company will continue permitting efforts in anticipation of the start of the NEPA and DEIS process at DeLamar. The baseline studies and MPO will serve as a basis for various permits, some that are required to be in place prior to construction, including point of compliance permitting, cyanidation permits and air permitting with the Idaho Department of Environmental Quality as well as Section 404 of the Clean Water Act with the U.S. Army Corps of Engineers. Upon receipt of a completeness determination from the BLM, Integra will begin the notice of intent process which initiates development of the DEIS in mid-2024.

The company will also continue tribal engagement and initiate the programmatic agreement (PA) process. The PA is a formal document established between the company, governmental agencies and tribal nations. The PA includes framework for identifying, managing and mitigating any potential impacts on culturally sensitive areas or historical sites.

Sustainability report

Integra recently published the latest sustainability report for DeLamar which outlines the company's commitments and performance in its environmental, social and governance practices. The sustainability report speaks to the vast amount of work various departments of the company have completed, advancing Integra's vision for developing projects that generate an enduring positive legacy for both the community and shareholders.

Management update

The company announces that its chief operating officer, Timothy Arnold, will retire from Integra at the end of 2023. Mr. Arnold has been a critical member of the Integra team for five years and helped guide the project from preliminary economic assessment (PEA) to prefeasibility study (PFS). The submission of the MPO represents the culmination of more than three years of permitting and baseline work overseen by Mr. Arnold and his team. Integra would like to thank Mr. Arnold for his commitment during his tenure and wishes him the best in retirement.

Integra is also pleased to announce the appointment of Scott Olsen to vice-president, engineering and processing. Mr. Olsen is a metallurgical engineer with approximately 25 years of industry experience. Mr. Olsen has held senior roles at the Bald Mountain Mine located in Nevada, U.S., for both Barrick Gold Corp. and Kinross Gold Corp., including chief metallurgist and various superintendent-level positions. Most recently, Mr. Olsen worked as a senior metallurgical engineer for Hanlon Engineering & Associates Inc., a leading process engineering consulting and contracting company. Mr. Olsen holds a degree in metallurgical engineering from the University of Idaho.

Annual grant of equity incentive awards

On Dec. 20, 2023, the company granted a total of 1,603,371 options, 941,898 restricted share units and 364,000 deferred share units (together, the equity incentive awards) to certain employees, executives, directors and consultants of the company. The equity incentive awards have been granted pursuant to the company's amended and restated equity incentive plan and are subject to vesting provisions. The options granted have an exercise price of $1.39 per share and will expire five years from the date of grant.

Qualified persons

The scientific and technical information contained in this news release has been reviewed and approved by Dr. Raphael Dutaut, PhD (PGeo), Integra's vice-president, exploration, and Mr. Arnold (PE, SME), Integra's chief operating officer. Both individuals are qualified persons as defined in National Instrument 43-101.

DeLamar project overview

The past-producing DeLamar project, which includes the adjacent DeLamar and Florida Mountain gold and silver deposits, is located in Owyhee county in southwest Idaho. Since acquiring the project in 2017, the company has demonstrated significant resource growth and conversion while providing robust economic studies in its maiden PEA and PFS. The most recent technical report is available on the company's website and has been filed on SEDAR+ and EDGAR.

About Integra Resources Corp.

Integra is one of the largest precious metals exploration and development companies in the Great basin of the western United States. Integra is currently focused on advancing its three flagship oxide heap leach projects: the past-producing DeLamar project located in southwestern Idaho and the Wildcat and Mountain View projects located in western Nevada. The company also holds a portfolio of highly prospective early-stage exploration projects in Idaho, Nevada and Arizona. Integra's long-term vision is to become a leading U.S.-focused mid-tier gold and silver producer.

We seek Safe Harbor.