Thanks, Retired!
That is pretty similar to the type of system I was considering.
Were you diverting flow from a bar ditch that runs after a decent rain?
I think I need to do poured concrete like you did. Unfortunately, I need to have the water level to be about 6' lower in one pond part of the time. I know how to do the project "right" with a compacted gravel base, but I can't do it the right way.
I was mainly wondering if it would work on compacted clay - that would form a water-tight seal beneath my concrete structure.
Looking at your work, I think it might. Your structure is clearly strong enough to withstand some lateral forces and some ground shifting. I think making the concrete structure with high mechanical integrity might be the key to my project.
