I live in Oklahoma City and dive Tenkiller regularly. As of last month vis was pretty bad(less than 5ft). It usually starts clearing up in March and the best month to dive there is April. Last April was the best vis all year and it was only about 15 ft. The year before that visibility in April was around 30 to 40 ft. If visibility is good the diving at Tenkiller is much better than Broken Bow. It has more of a rock base with lots of walls, overhangs, rock formations, and you see way more fish life. However, Broken Bow had much better visibility than Tenkiller all year last year. At Stevens Gap Area in early June there was about 15 ft of vis above the thermocline(which was at around 35ft) and about 30ft vis below it. But for every good thing there is a catch. I was reading 45 degrees at 65 ft of depth which made for a quick turnaround since I was only wearing my 5mm and a shorty. I also get to dive Lake Ouachita several times a year and it is much better than Degray. You must have a boat to get to the good sites though. If any of you Swampers have any questions about OK lakes (and a few in Arkansas) let me know I would be pleased to help. I will definitely be needing some info on TX lakes later in the season.
Gillty