I had heard years ago that about 10% of salmon die attempting to go around each dam on the Columbia river. After nine dams, only 0.9^9 or 39% of the original population survive. I hope they have improved the percentage.
“And amid all the splendours of the World, its vast halls and spaces, and its wheeling fires, Ilúvatar chose a place for their habitations in the Deeps of Time and in the midst of the innumerable stars.”
I had heard years ago that about 10% of salmon die attempting to go around each dam on the Columbia river. After nine dams, only 0.9^9 or 39% of the original population survive. I hope they have improved the percentage.