"America’s Aging Dams Are in Need of Repair"

"After two weeks that saw evacuations near Oroville, Calif., and flooding in Elko County, Nev., America’s dams are showing their age.

Nearly 2,000 state-regulated high-hazard dams in the United States were listed as being in need of repair in 2015, according to the Association of State Dam Safety Officials. A dam is considered 'high hazard' based on the potential for the loss of life as a result of failure.

By 2020, 70 percent of the dams in the United States will be more than 50 years old, according to the American Society of Civil Engineers."

Roy Griggs, Gregor Aisch, and Sarah Almukhtar report for the New York Times February 23, 2017.