Salmon swim freely in Klamath River for first time in more than 100 years

News comes after Iron Gate dam was removed to let river near California-Oregon border return to natural flow

For the first time in more than a century, salmon are swimming freely along the Klamath River and its tributaries, just days after the largest dam removal project in US history was completed.

Researchers determined that Chinook salmon began migrating on 3 October into previously inaccessible habitat above the site of the former Iron Gate dam, one of four towering dams near the California-Oregon border that were demolished as part of a national movement to let rivers return to their natural flow and to restore ecosystems for fish and other wildlife.