Sorry Z but my buddy Rick aka Optimus Prime just told me Benbrook also gets a Thermocline. I had to ask him since he is the King of Benbrook and is the current Bluecat record holder for that lake.
Hasn't had one in the last 2 years, and when I asked why, the TPWD , and a couple guides, told me because it has too much aeration to develop one. I've caught blues in 50 foot of water, in August on that lake, and it's only 53 or 54 foot deep, at the deepest points, in Summer.