Mount Polley Mine

Imperial Metals has announced that the British Columbia (BC) Conservation Service has gained search warrants for its Mount Polley mine and head office in Vancouver, in relation to an waste spill.

The search warrants support a joint investigation by the BC Conservation Service, the RCMP, Environment Canada and Fisheries and Oceans Canada into a spill of 25 million m³ of waste from the mine’s tailings pond on 4 August 2014.

Discover B2B Marketing That Performs

Combine business intelligence and editorial excellence to reach engaged professionals across 36 leading media platforms.

Find out more

BC Conservation Service Inspector Chris Doyle told cbcnews: "The investigation primarily focuses on offences related to the Environment Management Act and the Federal Fisheries Act, but is not limited to these acts."

Since the breach of the tailings storage facility (TSF) occurred, the mill has been on care and maintenance.

"The investigation primarily focuses on offences related to the Environment Management Act and the Federal Fisheries Act."

The company’s senior management responded immediately, working with its mine operating personnel, local agencies, provincial ministry officials and the engineers of record to assess the breach extent, as well as the impact of the release of water and tailings into the surrounding area.

The breach resulted in erosion and scour of the embankment separating the TSF from Polley Lake.

GlobalData Strategic Intelligence

US Tariffs are shifting - will you react or anticipate?

Don’t let policy changes catch you off guard. Stay proactive with real-time data and expert analysis.

By GlobalData

On 5 August the Province of BC issued a Pollution Abatement Order No. 107461 to Mount Polley Mining, requiring it to implement measures and submit documentation detailing the company’s response.

The open pit, copper-gold Mount Polley mine is located in south-central British Columbia and covers 18,794ha. The operation consists of seven mining leases totalling 2,007ha and 43 mineral claims over 16,787ha.


Image: An aerial view of the earthen dam at Mount Polley Mine in British Columbia. Photo: courtesy of Jesse Allen.

Mining Technology Excellence Awards - Nominations Closed

Nominations are now closed for the Mining Technology Excellence Awards. A big thanks to all the organisations that entered – your response has been outstanding, showcasing exceptional innovation, leadership, and impact

Excellence in Action
Dual-award winner in the 2025 Mining Technology Excellence Awards, Propeller is redefining geospatial intelligence and safety in mining. Explore how its AeroPoints and DirtMate solutions deliver survey-grade mapping, live haul metrics, and safer, more efficient operations across mines and quarries worldwide.

Discover the Impact