Sometime in the middle of the night on Monday, Aug. 4, the dam holding together a tailings basin at a British Columbian copper and gold mine gave way, sending 1.3 billion gallons of tainted, sludgy water into local streams and lakes.
Officials tell residents in the closest town, Likely, B.C., not to use the water from several lakes and rivers near the Mount Polley Mine, including a precautionary ban stretching all the way to the well-known Fraser River. (And no, “Likely” is not a made-up name from a ham-handed eco-novel. It’s a real town named for an old mining boss named John A. Likely). Mount Polley is operated by Imperial Metals of Vancouver.
The CBC reports that Canadian and provincial officials now assess the full extent of the damage and how something like this even happened. Global News is reporting that Mount Polley Mine employees are saying that tailings pond breaches have happened before, just never to this extent. Meantime, the breach compromises the town’s drinking water and sidelines its tourism economy, which had co-existed with mining, for an indeterminate amount of time. Possibly a very long time.
Already, copper mining critics cite this disaster as Exhibit A that these mines threaten local ecosystems. Many here in Minnesota wonder: if this tailings pond breach can happen at an active mine in Canada, where regulations are similarly stringent to U.S. law, how on earth can we be confident in a tailings pond at a proposed nonferrous mine in northern Minnesota? After all, those tailings basins are supposed to last 500 years, according to PolyMet’s own Environmental Impact Statement estimates.