Mount Polley – The Springer Pit as it was seen at the end of July of 2015 at 1,016 metres in height— Image by Monica Lamb-Yorski-Tribune File Photog

A mined-out pit used to store wastewater and milling leftovers at British Columbia’s Mount Polley Mine is expected to fill up in April. The B.C. government just issued a permit allowing treated pit water to be discharged into a nearby lake. (Photo by Monica Lamb-Yorsk/Williams Lake Tribune)