Florida Mountain Backfill Drill Program Progressing

VANCOUVER - Integra Resources Corp. reported on drill results from the DeLamar Project located in southwestern Idaho. The drill results announced today are from 20 additional drill holes representing 984.5 m from the North DeLamar backfill, Stockpile 1, Stockpile 2 and the first assays from Florida Mountain’s Jacobs Gulch and Tip Top backfill. The drill program and the assay results reported to date have exceeded the Company’s expectations and continue to demonstrate the potential for this material to extend the heap leach mine life at DeLamar and further enhance the Project economics. The estimated 60 Mt of previously blasted and mined material that has been stockpiled and/or used as backfill at DeLamar and Florida Mountain has consistently returned grades that far exceed the cut-off grade for the proposed heap leach operation outlined in the Company’s 2022 Pre-feasibility Study (PFS).

“The excellent drill results reported from the previously mined stockpiles and backfill at the Project are comparable to, and in some cases better than, drill results reported from in-situ oxide and mixed material zones drilled by Integra over the last five years at DeLamar and Florida Mountain. The stockpile drill program is progressing well and increasing our confidence that this material will have a significant positive impact on a potential future heap leach mining operation at DeLamar. The possibility of increasing the proposed mine life of the heap leach operation with this material, a portion of which was included as a pre-stripping cost in the PFS, should positively enhance the already robust economics of the Project. The Company has completed approximately 9,000 m of the 11,000 m stockpile drill program and expects to finish the drill program in April 2023. The 20 drill holes announced today further demonstrate the continuity of mineralized width and grade within the stockpiles,” said, George Salamis, President and CEO. “The possibility of expanding the heap leach mine life at DeLamar while advancing the proposed staged development approach for Millennial Precious Metals’ Wildcat and Mountain View projects, as announced by the companies on February 27, 2023, has the potential to create additional value for shareholders and the future Company post-merger, assuming all requisite approvals are obtained and the merger is completed.”

The stockpile drill program is being executed at 60 m collar spacings with select 30 m infill test holes to further verify grade variability. All drilling is vertical through the entirety of the stockpiles and backfill material. This drilling is being conducted by a combination of Sonic and traditional reverse circulation (“RC”) with casing advance drilling methods. Both these drilling methods maintain high sample quality and integrity throughout the drilling process. Additionally, the two drilling methods provide a basis for comparison for continuity. Sampling is being conducted at 1.5 m intervals for the whole of the drilling program with all samples sent to a third-party lab for analysis. These drilling methods also provide the opportunity for more advanced metallurgical tests in the future.