American Dams Are Being Demolished. And Nature Is Pushing that Along.

Once the height of engineering marvels, the great dams of the early 20th
century have outlasted their questionable usefulness. Only 50 years ago
this reversal was the fringe hope of people like Edward Abbey, the
radical environmentalist, writer and imaginer of a reborn West, who wrote: “All dams are ugly, but the Glen Canyon Dam is sinfully ugly.”