Two Dead in Underground Incident; Polymetals Suspends Endeavor Mine Activities
Polymetals Resources has reported a fatal underground incident at its Endeavor Mine in NSW, resulting in two deaths and a suspension of operations as investigations proceed.
- Fatal incident during underground shot firing at Endeavor Mine
- Two employees lost their lives; one injured and recovering
- Operations suspended immediately; staged resumption planned
- Company cooperating fully with authorities and regulators
- Support and counselling provided to affected families and staff
Incident Overview
Polymetals Resources Ltd (ASX, POL) has been shaken by a tragic event at its flagship Endeavor Silver Zinc Mine in Cobar, New South Wales. On the early morning of October 28, 2025, a fatal incident occurred approximately 700 meters underground during shot firing activities, a critical and hazardous phase of mining operations. The accident claimed the lives of two experienced employees, Patrick McMullen, a 59-year-old Mining Shift Supervisor, and Holly Clarke, a 24-year-old Charge-up Operator. A third team member, MacKenzie Stirling, is currently recovering at home.
Immediate Response and Company Stance
The company swiftly suspended all mining and surface operations following the incident, prioritizing safety and support for its workforce. Polymetals’ board and management expressed profound condolences to the families and colleagues affected, emphasizing the emotional toll on the company’s close-knit team. Executive Chairman Dave Sproule underscored the company’s commitment to understanding the root cause and preventing any recurrence, stating that safety remains the highest operational priority.
Investigation and Operational Impact
Authorities including the New South Wales Police Service and the NSW Resources Regulator have joined the ongoing investigation into the cause of the incident, which remains unknown at this stage. Polymetals is cooperating fully with these bodies to ensure a thorough inquiry. Meanwhile, the company plans a cautious, staged resumption of activities starting November 5, with exploration drilling and concentrate transport expected to recommence first, followed by mining and processing operations. Counselling services continue to be offered to all personnel as the workforce gradually returns.
Broader Implications
This incident not only disrupts Polymetals’ production but also casts a spotlight on the inherent risks of underground mining, particularly during shot firing; a process involving controlled detonations to break rock. The tragedy may prompt heightened regulatory scrutiny and industry-wide reassessments of safety protocols. For investors, the immediate financial impact is uncertain, but the reputational and operational consequences are significant.
Looking Ahead
As Polymetals navigates this difficult chapter, the mining community and stakeholders will be watching closely for the investigation’s findings and the company’s response. The balance between operational continuity and uncompromising safety will be critical in restoring confidence and ensuring the long-term viability of the Endeavor Mine.
Bottom Line?
Polymetals faces a pivotal moment as it seeks answers and recovery following a devastating underground tragedy.
Questions in the middle?
- What specific factors led to the fatal shot firing incident at Endeavor Mine?
- How will this event affect Polymetals’ production forecasts and financial outlook?
- What new safety measures will Polymetals implement to prevent future incidents?
