MTPR

Nathan Cook

A slickens in Montana's upper Clark Fork basin. Slickens are areas devoid of life due to heavy metal contamination from mine waste.
Nora Saks / Montana Public Radio

Montana wildlife officials are investigating what’s being described as a "significant" fish kill along the banks of the Upper Clark Fork River.

Montana Fish, Wildlife and Parks fisheries biologist Nathan Cook fielded a report this weekend of several dead fish downstream of Warm Springs and upstream of Galen.