Mount Polley Mine Tailings Dam Breach, Likely, August 4, 2014

» New: Video of Phase One Cleanup (July 29, 2015)

A tailings dam failure at the Mount Polley Mine occurred on August 4, 2014 resulting in the loss of about 17 million cubic meters of water and 8 million cubic meters of tailings/materials into Polley Lake, Hazeltine Creek and Quesnel Lake having significant impact. An emergency response was undertaken by the Province involving various agencies throughout August and into September of 2014. A Pollution Abatement Order under the Environmental Management Act was issued on August 5, 2014 and amended on May 27, 2015 to abate the discharge, undertake an environmental impact assessment of the breach and implement remediation activities. A Letter of Understanding between the Province and Soda Creek Indian Band and Williams Lake Indian Band outlines a collaborative approach to jointly address all aspects of the tailings breach. The Ministry of Environment is leading the response for the environmental monitoring, impact assessment, mitigation, and remediation of the area impacted as a result of the Mount Polley Mine tailings breach, and is working closely with First Nations, local governments, provincial and federal agencies, and public representatives.


Calendar v5.0 MoE Calendar of Sampling Dates up to May 24, 2015 [PDF 97KB]

MAP v13.0 MoE Mount Polley PDF Map of All Types of Sampling Sites up to
May 24, 2015 [PDF 819KB]

Contact Information

Posted for Public Comment

  • Mt. Polley Post-Event Environmental
    Impact Assessment Report
    » summary [PDF 48.5MB]
    » full report [PDF 165 MB]
  • Comments on the report close July 21, 2016

Ministry of Environment

Ministry of Energy
and Mines

Ministry of Forests, Lands and Natural Resource Operations

Imperial Metals

Interior Health Authority

First Nations Health Authority