I took too much for granted. . . information about the lake. Take highway 77 off of I-35 and go east to highway 77S There is a state park with a boat ramp, but pretty shallow water. . . you can look to the south where there is a bluff and a stone building close to the water. At the base of the building is some of the deeper water close to shore, about 30 plus feet deep with a sandy bottom. If you turn south on 77S it will cross the dam and there is a park. The water there isn't very deep till you get quite a distance from shore. Be sure to have a dive flag, and I like to tow it with me as I head for the middle, and water about 30 feet.
The lake is like a shallow bowl, with most fish life in the middle of the lake. In warmer water, May, June, July, etc. Lots of sunfish will move into the sandy shallower areas, and are fun to practice your stalking skills. Bass and other predators will come up to the level with the baitfish, and look for cover to ambush these sunfish. It's a fun lake for easy diving, and fairly clear if you're not trailing behind other divers.
Other Oklahoma lakes that are good for divers are further away from you. Lake Elmer Thomas is just north of Lawton in the southwest part of the state. Good visability, except when full of dive instructors with swarms of check out divers. . . like swarms of locusts, stirring up the bottom. There are several roads that can take you to smaller, quieter places. Deeper water can be found near the dam, with an older dam, underwater.
Lake Tenkiller, is on the eastern edge of the state, about 10 miles norh of I-40. . . It has a couple of dive shops for air or equiment rental. On the southeast corner of the lake is Tenkiller State Park, with cabins and campground. It has Oklahoma's only underwater state park, with sunken boats, school bus and other surprises. Tenkiller is a deep, rocky lake, with good visibility when not flooded, like this past year and frequent tropical storms overhead.