The river below the tube chute is pretty sweet, it get's shallow for maybe 300 yards, then after you go under the fist bridge, it gets nice and deep, probably around 6 feet average. it's cool to go around the walls along the side and play with the catfish underneath them, and there are crawdads in just about every clump of weeds. There are two set's of rapids that are pretty strong, and watch for the last public exit, if you miss it I dunno how you can get out.
Oh, and there's a waterfall also below the tube chute maybe 200 yards. You can't really see it underwater until you are right about to go over it. It's kinda painful if you aren't expecting it. Not that I would know of course, somebody totally not me fell over the waterfall yelling OH ******. Somebody totally not me. yes. well. Other than that, it's a really fun dive, especially when it get's shallow and you are flying along the bottom!