Mueller said he found a stash of underwater bottles while swimming once in the 1960s, but he was unable to reach them, so when he returned to the lake July 15 he brought friend Adam Blokzyl and diving expert Dave Davison to help.
Mueller said the group was getting ready to pack it up for the day when Davison found three bottles underwater, and one was still sealed and intact.
"I was vindicated. We were successful," Mueller told BarrieToday.com.
Mueller said Davison spotted more bottles buried under debris at the bottom of the water and they are planning to return to see if they can find more that remain sealed.
He said the whiskey was produced by the Gooderham & Worts company, which discontinued the spirit in the 1990s.
"Whiskey is usually aged 12 years before it's sold. So this stuff could be 69 years old," he said.