The Bureau of Indian Affairs and Yakama Nation are mulling over two designs which aim to reduce fish mortality at the site ...

Brown trout can harm native trout species, such as bull trout and westslope cutthroat, by outcompeting them for resources and ...

State officials have confirmed the presence of nonnative brown trout in the Flathead River system. An angler reportedly ...

A brown trout discovered June 9 has state biologists worried about potential impacts to native trout populations if the invasive fish get established.

Montana Fish, Wildlife & Parks has confirmed the presence of a non-native brown trout in the Flathead River, upstream of the ...

Bull trout were once abundant in the upper Clark Fork River but historic mining and smelting activities upstream affected this species and other aquatic life and its numbers remain low.

The Alliance for the Wild Rockies and another plaintiff allege water diverted from the Clark Fork River by the West Side Ditch Company and Grant-Kohrs ranch imperil threatened bull trout.

The Clark Fork River is federally-designated “critical habitat” for bull trout, a “threatened” species under the Endangered Species Act since 1999. The Upper Clark Fork is also part of the ...

Research in recent years has identified issues affecting rivers and aquatic life in the Jefferson River Basin, including low dissolved oxygen, warm temperatures, algae blooms and nutrients.

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