Twenty thousand salmon are swimming home. That is how many chinook salmon have migrated up the Klamath River, which flows through southern Oregon and northern California, in the two years since four dams were torn down. The count comes from a new study reported by Inside Climate News, and it is far better than anyone dared to hope.
The Klamath was not always a welcoming place for fish. For decades, a chain of dams blocked the river, trapping salmon in warm, sluggish pools and cutting them off from the cool spawning grounds upstream. Removing those four dams was a huge project, and scientists expected the river's recovery to take a long time. They were wrong.
"The biological response has been much faster than I, and most of us, expected," said Damon Goodman, the lead author of the study. Fall-run salmon are returning in numbers nobody predicted this quickly, and their arrival is a clear sign the river is healing.
Challenges remain, of course. There are still questions over who gets how much water, and two dams still stand on the river. But the sight of 20,000 salmon pushing upstream is powerful proof that when people remove an obstacle, nature often knows exactly what to do next.
The story is part of a wider wave of dam removals across the United States, where rivers that were once strangled by concrete are being allowed to run free again. Each success teaches scientists a little more about how fast freshwater ecosystems can recover — and the Klamath is setting an encouraging pace.
The return of the salmon is more than a number. It means fish are reaching gravel beds they have not touched in generations, laying eggs that will hatch into the next wild run. It means eagles, bears and the tribes who have stewarded this river for thousands of years have their fish back. And it gives hope to every other river project still waiting to begin.
Goodman's study offers a simple but profound lesson: restore the flow, and life will follow. As the Klamath keeps healing, scientists will keep counting, watching and learning. If the first two years are anything to go by, the river's comeback is just getting started.