(WHAS11) - The department of natural resources says this is a "recovery" mission at this hour and no longer classified as a rescue mission. The water in the Ohio River was a steamy 82 degrees today, lessening the chances of survival after this much time has passed.
But that's not the only danger in the river waters. It's a place called "duck pond", near the fossil beds on the falls of the Ohio River.
19-year-old Ryan Dahn was wading the waist-deep water, with his girlfriend's brother, 12-year-old Jacob. It's something a lot of folks in Clarksville do to fish or swim. But the area can be dangerous.
The duck pond can range in depth from 2 feet in one place, to a ledge of 30 feet deep in the next step. That's how conservation officers fear the boy lost his footing and may have gotten caught up in the current.
The same uncertainty in that water, is what's also hindering the search efforts, making it more difficult for sonar devices and divers to see in the many crevices and uneven areas underwater. Local fishermen say those dangers underwater are what usually keep them close to the banks.
The 12-year-old boy is out of the hospital today with no serious injuries. Earlier today, he came down here to assist conservation officers with their search. They say he helped them narrow down where they are searching, but they have still found no clues.
They say they will continue their search until dark tonight, resuming tomorrow morning and they will continue their search for "as many days as it takes" to find something.