Three men from Dalton are missing and feared dead after a boat capsized at Nickajack Lake near the dam around 8:30 p.m. Saturday.
Marion County Sheriff Bo Burnette said the rescue operation had been turned into a recovery operation.
The search had continued through the night and all day Sunday.
There were five men in the boat and rescuers located two of the men in the chilly water. They were taken to a local hospital.
The three men that are missing were wearing life vests, officials said. However, Sheriff Burnette said the life vests would not have been of much value in the turbulent water near the dam.
It is believed the boat was swamped by the fast-moving water. A sign nearby warns Dangerous Water.
The men were apparently out on a fishing trip.