I was at Tenkiller last Saturday the 4th. . . There was a crowd of new divers at the state park dive site and the mud was stirred up. If that's where you want to go, bring a dive flag and dive to the north (bluffs) or south (sandy flat) of the bouys for better viz. Crappie point was better viz if you're not following new divers, go inside the cove for a protected and generally clear dive. My friends and I were diving from a boat and where ever we found rocky or sandy areas we had 6 to 15 feet of viz. Some of our dive sites were in muddy areas and we found silt with 1 foot viz with 10 foot viz close buy. . . There are more boats than usual due to other lakes being closed, and they affect where you can dive. If you dive below the thermocline, about 30 feet, the visibility was 8 to 15 feet and getting dark. The two dive shops, Gene's Pro Shop and Tim's Nautical Adventures can help you find dive site advise.