The environmental impact due to the Mount Polley Mine tailing breach is highlighted in red by the geomatics firm Effigis.

The tailings pond dam at the Mount Polley Mine site was breached on BC Day, Aug. 4. An estimated 10 million cubic metres of water and 4.5 million cubic metres of fine sand was released. Hazeltine Creek flows out of Polley Lake and the flow of contaminated water continued into Quesnel Lake.