That's a great-sized yellow bass, in my book. I've mostly caught small ones at Herb Parsons. Sadly, the TN river is a solid 2-hour drive from my house near Memphis, so I don't get to enjoy that place as often as I would like.
My brother and I were at the wall of the dam Friday afternoon. We didn't catch the numbers that you did, but I don't have the equipment to set up on a spot out in the river. I *do* have a jon boat that can get into little pockets, so we fished the current seam below the dam and did OK. I just bought this jon boat. It came with a 15 hp motor and not much else, so I have some work to do to make it a true fish-catching machine.
We probably caught about 40 or 50 skipjack that were very large on average. We boated 7 big white bass, with the largest going about 17 inches. My brother caught a drum that was about 8 lbs, and a striper that was 6 or 7 (it was 22 inches, I forgot to weigh it). He had a lot of fun with those 2
We ended up drifting shiners weighted towards the bottom for most of our edible fish, but the skipjack were a force to be reckoned with and caused us to change tactics several times to get below them. If I accidentally dragged the shiner across the water after a cast, they would often snap it up before I could get the bait down. We caught a few white bass on 2" soft plastics with 1/8 oz heads, but the skipjack finally made me put my jigging rod down.
I've never had good enough electronics to pinpoint them out in the river away from the dam itself, but ONE DAY...