INTEGRA APPOINTS AUSENCO TO LEAD DETAILED ENGINEERING AT DELAMAR, NEPA PUBLIC SCOPING PERIOD UNDERWAY

Executive Summary

• Integra Resources Corp. has appointed Ausenco as the lead engineering partner to conduct detailed engineering activities at its DeLamar Project in Idaho.
• The engineering appointment coincides with the start of the 30-day public scoping and stakeholder engagement period for the NEPA review process, following the BLM's Notice of Intent publication on May 29, 2026.
• Detailed engineering is already underway and will continue through Q1 2027, with long-lead procurement beginning in H2 2026; the final EIS and ROD are expected in H2 2027 to inform a construction decision.

Key Details

• Engineering Partner: Ausenco Engineering USA South Inc. appointed as lead engineering partner for detailed engineering and execution readiness activities.
• Sub-Consultant: Ausenco retained SLR Consulting to provide specialized heap leach engineering, metallurgy, and mine planning expertise.
• Technical Report Reference: SLR (Forte) previously prepared the "Feasibility Study and Technical Report on the DeLamar Project" dated February 2, 2026 (effective December 8, 2025).
• Regulatory Milestone: BLM published the Notice of Intent (NOI) on May 29, 2026, initiating a 30-day public scoping and stakeholder engagement period under the National Environmental Policy Act (NEPA).
• Engineering Timeline: Detailed engineering work is already underway and will continue through Q1 2027.
• Procurement Schedule: Long-lead procurement activities are scheduled to begin in the second half of 2026 and continue through 2027.
• Regulatory Timeline: The final Environmental Impact Statement (EIS) and Record of Decision (ROD) from the BLM are anticipated in the second half of 2027.
• Next Steps: Completion of detailed engineering and receipt of the final EIS/ROD will inform a construction decision for the DeLamar Project.
• Project Status: DeLamar is noted as one of the largest and most advanced heap leach projects currently in the NEPA process.

Notable Quotes

• George Salamis, President, CEO and Director: "Entering the detailed engineering phase at DeLamar is a major milestone for the Company. As one of the largest and most advanced heap leach projects currently in the NEPA process, DeLamar has the potential to drive long-term economic growth and job creation in southwestern Idaho... The appointment of Ausenco strengthens the Company's position to advance DeLamar as the Company progresses through the NEPA process."
• Cliff Lafleur, Chief Operating Officer: "We have assembled an experienced detailed engineering team led by Ausenco, which has a proven track record of executing similar mandates on open pit projects of this scale. Detailed engineering work is already underway and will continue through Q1 2027, with long-lead procurement activities beginning in the second half of this year and continuing through 2027. The detailed engineering, along with the expected receipt of the final EIS and ROD next year, will inform a construction decision for DeLamar."