In 2024, the United States removed many old dams. This was a very big year for this work. Because of these changes, more than 2,500 miles of rivers are now connected again. This helps many fish and animals return to their natural homes. When people remove these barriers, the rivers become healthy again.
One famous example is the Klamath River. People removed four old hydroelectric dams there. This opened more than 400 miles of space for fish to live and grow. The change happened very fast. Chinook salmon began to return to the Klamath River watershed immediately. Experts say this quick return of fish feels like magic. It shows that nature can recover quickly when we remove barriers.
This problem is not new. Long ago, Henry David Thoreau wrote about the Talbot Mills Dam in Billerica, Massachusetts. He said the dam stopped fish, like the American shad, from moving. This shows that dams and fish have had problems for a long time.
Many small dams still cause problems, especially in the northeastern United States. There are at least 35,000 dams in this region. These dams stop fish from moving freely. In New York, there are 9,000 dams. Connecticut has 5,000 dams, and Massachusetts has more than 3,000 dams. Since 1912, people have removed more than 2,300 dams in the United States. Most of these removals happened in the last 25 years. Now, people want rivers to flow naturally again to help all living things.