@adrian2301 I agree. It seems that the vast majority of water wheels have masonry running on their side and below them. This makes sense for both the stability of the support structures, as well as erosion control. I’m no expert on the matter, but I imagine water wheels would increase the rate of erosion for the banks surrounding them. But even just going off the art, I would think that the foundation cobblestone would continue down and over, to at least the support.
