The legend of the Giant catfish that swallowed a Diver in the Ohio river

 Now I have seen some big fish in our local rivers and I know divers who are afraid to go around certain intakes and out takes along the rivers because fish can grow to very large sizes.But not bigger than a car.The largest fish pulled from the Ohio in WV. was a 70 pound Flat head catfish

But a legend has persisted that a giant catfish devoured a diver at a set of lock and dams along the Ohio river 

The story goes as follows but there are different versions .

A man driving his car in 1950s at a newly completed  Ohio River  lock and dam looses control and drives into the river  and drowns before emergency divers can get to him. 

The  submerged car blocks the locks  water intake to raise and lower the lock so 2 divers go down to remove it and persons body .  They find the car open door to remove the drivers body  and are shadowed by the fish  who is bigger than a car who attacks the one diver as the other takes off for the surface he surfaces and is rescued just in time as the attacked drivers legs  surface then the fish who swallows them and goes back under the waves all witnessed by nearby observers waiting to see the car removed. 

First off such a thing happening would be in newspaper some where with so many witnesses and no such article exists and you can not get that close to any of the locks and dams they have fencing and barriers.

So it apparently is just another Urban legend some one made up about the fish which do grow large around intakes where they feed on nutrients. My driver friend takes a fish billy down with him when they get that big they are usually pretty slow and you just bump them out of the way.