We went to to tenkiller last wed-saturday, took a little over 40 students all together. The vis out in the lake and the cove we were at was terrible, maybe 2 feet. However, on thursday we went to check out the scuba park and the vis was MUCH better. Before it started getting messed up from all the traffic, I would say viz was 15 ft at least, it was really nice. After students being in and out all day, it was still probably 10 feet in most places. Saturday morning a couple of us went off the ledge to about 110ft, and once you get below 85ft or so it REALLY opens up. We could see as far as our lights would shine, probably 30 feet. It was the best dive of the week. Also, I know some people that went to beaver 2 weeks ago and they said viz was really good there, up to 30 feet I think.