The adult population of genetically unique westslope cutthroat trout in a river in B.C.’s Kootenay region dropped by 93 per cent this past fall compared with 2017 levels, according to a monitoring report from Teck Resources.

The company operates four giant metallurgical coal mines in the Elk Valley region, where levels of selenium pollution, which originates from the mines’ many waste rock piles, have increased steadily for decades.

Teck has conducted fish surveys in the Upper Fording River since 2012. A fall presentation from Teck reviewed by The Narwhal shows that monitoring conducted by contractors in September and October 2019 identified a precipitous decline in adult and juvenile westslope cutthroat trout in the Upper Fording and that such a decline “represents a trigger” for a population crash.

Upper Fording River adult trout counts dropped 93 per cent and juvenile counts dropped 74 per cent from 2017 levels, according to Teck.

Source: https://thenarwhal.ca/teck-resources-elk-valley-mines-bc-fish/