As Columbia has it’s very own Dam as well, luckily for these folks in Austin, Texas. The Dam is not as big.
It seems in the video and photo that the boaters got a little too close to the edge here. I get that the currents can take you out a ways, but this boat has an engine and I would assume could have easily avoided getting this close to the edge. Luckily no one was hurt during the boating trip nor the rescue.
Be safe out there on Lake Murray!