A dam near East Liverpool is on an EPA high hazard list.
The Little Blue Run Dam is in Pennsylvania, just across the Ohio River from the town of East Liverpool.
The dam holds back a lake that contains coal waste from one of First Energy's nearby power plants.
The Little Blue Run Dam and 43 other dams are on an EPA high hazard potential list, because failure of the dams will probably cause a loss of human life.
A First Energy spokesman says the dam is inspected twice a year.