South32’s Hermosa project safety award: underground controls and lessons for mine teams
Reviewed by Tom Sullivan
First reported on International Mining – News
30 Second Briefing
South32’s Hermosa project in Arizona has received the 2025 Sentinels of Safety Award in the Underground Metal Group from the US National Mining Association, recognising its leading national performance on mine safety. The award focuses on fatality and serious injury prevention, signalling that Hermosa’s underground development and operating practices have achieved a sustained record of zero or very low recordable incidents. For mine operators, Hermosa’s recognition reinforces the value of rigorous controls around underground ground support, ventilation, and procedural discipline in meeting top-tier US safety benchmarks.
Technical Brief
- Recognition typically assumes robust controls for ground support, ventilation, explosives handling and mobile equipment interaction.
- For other underground mines, the award framework provides a de facto performance benchmark for safety KPIs.
Our Take
Hermosa’s safety recognition in the United States comes as the project is moving through intensive federal permitting, with the US Forest Service already issuing a Final EIS and Record of Decision for the zinc-silver development; strong safety credentials typically help de‑risk scrutiny around access roads and ancillary works on federal land.
Our database shows Hermosa as one of the more capital-intensive US critical minerals projects, with first-stage capex on the Taylor deposit lifted to about $3.3 billion, so a high-profile safety award may support South32’s case with financiers and offtakers that the operation can manage complex underground and processing risks at scale.
Related coverage notes Hermosa’s adoption of Glencore Technology’s Jameson Concentrator for critical minerals processing, and pairing that kind of compact, high-intensity plant with award-winning safety performance will be watched closely by other US copper–zinc–manganese developers considering similar flowsheets.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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