We are in the process of building our horse facility. I have an un-used wooded area where I want to make a water crossing(for trail training) that I can turn on just when i'm using it. That way it's like a flowing stream with water sounds. I wanted to see what other people use for footing in water. I'm worried about the horses puncturing the liner. So maybe after the liner lay down wash stall mats, with round rock or sand over? Any thoughts?