Since the 1950s, at least 441 people have died at 235 submerged dams in 38 states. About half of those deaths occurred in the past 15 years — a period when many cities have sought to repurpose their rivers into picturesque attractions that would draw tourists and shoppers to business districts.
A look at the states with the most recorded deaths from low-head dams:
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Maryland, Ohio, Texas, Virginia: 14 each
Source: Brigham Young University database