“Reducing the release of harmful substances found in coal mining effluent discharged into the Elk River and the transboundary Kootenay River basin remains a matter of key importance for Canada,” he said in an emailed response to questions from The Narwhal.
Which throws the federal ball to Environment and Climate Change Canada.
https://thenarwhal.ca/canada-u-s-governments-watching-intervening-coal-mine-pollution-controversy/