Bonneville cutthroat trout (Oncorhynchus clarki utah) Sensitive Only one trout subspecies, the Bonneville cutthroat trout, is endemic to ... trout stock, from which the Bonneville cutthroat became isolated due to volcanic activity about 30, 000 years ago (Duff, 1996b). ... Gaining access to portions of the allotment has become a problem because of past and current mining activities and previous timber sales.
|Title||:||Caribou National Forest (N.F.), Smoky Canyon Phosphate Mine|