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How tiny dams repair cottonwood trees damaged by giant dams along the Colorado River

By David Condos
Published August 16, 2025 at 5:00 AM PDT

Giant dams built to conserve the Colorado River have nearly wiped out nearby native cottonwood trees, causing big ecosystem disruption. Tiny dams built to mimic those built by beavers could bring them back.

Copyright 2025 NPR
David Condos