Mount Polley Mine

  • open pit copper/gold mine
  • mill processes 20,000 tonnes per day
  • commenced operations 1997
  • current mine life to 2025
  • concentrate trucked to Port of Vancouver
  • mine operations suspended Aug 4, 2014 due to TSF breach
  • modified mine operations restarted Aug 5, 2015
Claim Map: Mount Polley
Mount Polley mine operations, which had been suspended since the August 4, 2014 breach of the tailings embankment, were restarted on August 5, 2015 following receipt of permit amendments on July 5, 2015. The permit allowed recommencement using a modified operation plan that includes using the Springer pit to contain a maximum of 4.0 million tonnes of tailings over a maximum period of one year. This is approximately 50% of the plant's annual capacity. Renewed operations will be conducted on a one week one on, one week off basis with ore coming from the Cariboo pit and the Boundary zone underground mine.

Permitting work on both a short term and long term water discharge permit is underway. Obtaining these permits is required to maintain the water balance on the site. Work is also underway to design a system to store tailings in the long term which would allow the mine to restart full scale operations.

An independent expert review panel, appointed by the Province in cooperation with the Xat'sull First Nation and the Williams Lake Indian Band concluded in their January 30, 2015 report the cause of the breach was failure of an underlying glacio-lacustrine layer not identified by the design engineers and not related to construction or maintenance of the tailings embankment.

Rehabilitation work continues in the areas affected by the breach. We remain committed to working with the Ministry of Environment, the Xat'sull First Nation and the Williams Lake Indian Band, and the local community to mitigate the effects of the breach.

Mount Polley is an open pit copper/gold mine with a developing underground project located in south-central British Columbia, 56 kilometres northwest of Williams Lake. The Mount Polley property covers 18,892 hectares, consisting of seven mining leases totalling 2,007 hectares, and 44 mineral claims encompassing 16,885 hectares.

Updated Sep | 2015

For current and/or additional information, refer to the Company's Press Releases, Quarter Reports & Annual Information Form.