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Yukon disaster one of two ‘most catastrophic’ in heap-leach mining history: expert

YUKON, JUL 8 – The heap-leach failure released about two million tonnes of cyanide-soaked ore, prompting 50 safety recommendations from the independent review board, officials said.

  • An ore slope failed at the Eagle Gold Mine in central Yukon in June 2024, contaminating a local creek and groundwater.
  • The failure occurred after large-scale liquefaction caused by poor ore quality, an over-steepened slope, and a rising water table.
  • The incident released nearly two million tonnes of ore containing cyanide and was identified as one of the two most severe heap-leaching failures in the past 45 years.
  • The independent review board released 50 recommendations in early July 2025, with Mark Smith stating, "none of the recommendations are particularly expensive."
  • Yukon officials are reviewing the report, while Smith hopes the findings will improve surveillance and guide safer heap-leach practices industry-wide.
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Winnipeg Free PressWinnipeg Free Press
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Yukon disaster one of two 'most catastrophic' in heap-leach mining history: expert

Breaking News, Sports, Manitoba, Canada

·Winnipeg, Canada
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Winnipeg Free Press broke the news in Winnipeg, Canada on Tuesday, July 8, 2025.
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