Hello, I am installing a 25' stream between by bog and pond. The drop is about 4' and I hope to incorporate 2 small water features. I had the bed dug with an excavator which left me with a half circle shaped bed. See attached. Couple of questions; I am considering using that huge boulder on the top left as a waterfall by running it across the stream and digging it into the side of the hill so it does not create a huge pool above it. Is this a bad idea? I am not sure if I am going to be able to keep the water running straight over it? Also, I was considering running the plumbing up the bed on top of the liner but am not sure I want to put it under that big of a rock. Any thoughts on this or general design suggestions like how big of a berm I need on the sides? This is my first stream (and bog and pond). I appreciate it!