Fire crews evacuated people from the restaurant individually, taking each down a special pier wearing a life jacket, according to Local 12.
At around midnight today, the restaurant was wedged on a pier near the Clay Wade Bailey Bridge in Covington, Ky., forcing the bridge to close as a precaution.
Investigators are not certain why the restaurant broke free, though the high water likely was a factor. The Ohio River is at about 55 feet, which is 3 feet above flood stage.
The Waterfront specializes in seafood dishes and, when docked, is located at the Pete Rose Pier in Covington.