Fine sediment deposition from Clark Canyon Creek has affected fisheries in the Beaverhead River during years when peak flow releases from Clark Canyon Dam are insufficient to transport the additional tributary sediment. Limited releases during the spring have allowed fine sediment to deposit in the Beaverhead River, which has affected the trout fishery downstream from the dam. Reclamation did a study to investigate flow releases from Clark Canyon Dam that would help mobilize and transport fine sediment from the streambed. An annual program of short-duration, high-flow releases from Clark Canyon Dam are expected to flush fine sediments from the streambed and result in improved habitat conditions for trout.

USBR’s Beaverhead River Flushing Flow Study January 2013

Clark Canyon Creek Final Technical Report Januray 2013

Clark Canyon Creek Site Visit Summary September 2011