I've heard a story like that, only it was about the lopez dam. I figured it was just a story since the lake record is only around 40lbs. Another catfish story I heard was when the Mississippi river flooded and there was a huge catfish roaming the flood waters eating dogs and cats. Supposedly, a crew of men armed with heavy equipment and steel line went out to try and catch it. That was obviously just another story, but it would make for a cool horror flick.