Bunker Hill Mining Announces First Stope Blast on Track for Commercial Production in Q4|2026

KELLOGG, Idaho and VANCOUVER, British Columbia, Aug. 17, 2026 (GLOBE NEWSWIRE) — Bunker Hill Mining Corp. (“ Bunker Hill ” or the “ Company ”) ( TSX: BNKR | OTCQB: BHLL ) is pleased to announce that the Company has completed the first production stope blast and has achieved four consecutive years without a lost-time incident, representing two significant milestones at the Company’s 100% owned Bunker Hill Mine . The milestones demonstrate continued progress in the safe restart and ramp-up of the historic Bunker Hill Mine and underscore the Company’s focus on operational execution as it advances toward commercial production by the end of 2026.

President and CEO, Sam Ash, commented, “These are significant achievements for Bunker Hill and, most importantly, for our people. Four years without a lost-time incident demonstrates the strength of our team and their commitment to operating safely. The first production stope blast is another significant step in the transformation of Bunker Hill from a historic mine under redevelopment to a producing operation. We remain focused on disciplined execution and are on track to achieve commercial production by year-end.”

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The Company has completed the first production stope blast at the Bunker Hill Mine, marking the transition from mine redevelopment and preparation toward sustained underground production.

The stope blast follows extensive underground rehabilitation, development and infrastructure work undertaken to prepare the Bunker Hill Mine for the restart of operations. The Company is now advancing the next stages of stope development and mining production as it continues to ramp up underground mining activities in ways that support the 1800 tpd operation.

The stoping method is transverse longhole stoping, mining in a primary-secondary configuration. Stopes will be backfilled with paste backfill, which will mix mill tails from the newly commissioned tails filter press with cement in a paste plant. The paste will be pumped underground into the excavated stopes, resulting in geotechnical stability allowing safe extraction of secondary stopes. This modern and highly efficient mining method of stoping and paste backfilling allows the Bunker Hill Mine to operate without a surface tails facility, minimizing environmental impact in line with the Company’s strategic priorities.

The Company is also proud of its demonstrated commitment to safety and its people during redevelopment and ramp-up activities, as shown by four consecutive years without a lost-time incident (“ LTI ”) and one full year without a recordable safety incident at the Bunker Hill Mine.