I am looking at building my own shotcrete pool. I have friends that have excavating, and shotcrete companies. I am planning to sub out the excavation, shotcrete and plaster part of the build and I will be doing the rest. I have done a ton of research and the only thing I could not find is a guide to waterfall foundations. Can anyone guide me on the depth and size of concrete foundation for a waterfall? Also the rebar gridding surrounding the waterfall