The Twin Lakes Walleye Club does monthly, sometimes bi-weekly, dissolved oxygen and temperature readings on Bull Shoals and passes that info to us (AGFC) and MDC. They do a great job and the data collected is very interesting. They collected data from 7 locations on 6/17 (Point 4,8,10,11,16,18, and 20). I have posted readies from Point 4 and 20. For Point 4, If you look at the DO (ppm) you will see the highest amount is around 25 feet. That is where the thermocline is likely to start setting up in lower end of Bull Shoals. Now scroll down and look at Bull Shoals Lake Point 20. You will see that the thermocline has yet to develop as well as down lake. Feel free to send me an email and I will send the rest of the readings.