NPR

More than 2,200 dams are in poor condition, posing danger to communities

Long-deferred maintenance, a changing climate and the construction of homes, businesses and highways below previously remote dams are all contributing to the soaring numbers.

More than 2,200 dams built upstream from homes or communities are in poor condition across the U.S., likely endangering lives if they were to fail, according to an Associated Press analysis.

The number of high-hazard dams in need of repairs is up substantially from a similar AP review conducted just three years ago.

There are several reasons for the increased risk. Long-deferred maintenance has added more dams to the troubled list. A changing climate has subjected some dams to greater strain from intense rainstorms. Homes, businesses and highways also

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