I have seen a lot of pictures on here, checking to see if there are suggestions that I have the right concept. The water will raise up so this will be in 2 feet of water.
Does there need to be trees or anything else close by to these types of spawning areas? some old brick are okay...or use more natural rock?
I have some that have some concrete and cinder blocks as some back wall coverage.
SMB can spawn anywhere from 1 foot to 25 feet depending on circumstances. I would make some beds from 1 foot to 4 feet assuming no significant water level drops. Deeper will work if the water is clear.