Beaver-engineered dam in the Czech Republic
The 928th tallest dam in the world
In early 2025, beaver activity in the Brdy Protected Landscape Area, Czech Republic, contributed to the restoration of a wetland ecosystem. A family of beavers constructed a series of dams that accomplished environmental goals set by the Czech government, which had delayed its proposed project since 2018 for bureaucratic and financial reasons. The beaver-built dams saved the Czech government approximately US$1.2 million, providing ecological benefits including improved water quality, enhanced biodiversity, and better water retention.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).