Jimbo how big is that water trough
I honestly couldn't tell you.
Using the dementions of that 4" overflow pvc and the 2x6 board as a reference, you could figure pretty close the measurements of the trough. The overflow pipe directs the water away preventing the trough from overflowing and creating a lake under and around it which the hogs would soon turn into a wallow.
That picture was taken on an old lease I was on in LaSalle county in 2007. What I do remember is there seemed to be a rattler under every bush.