The answer, that is, to why ranchers hereabouts no longer use the beaverslide to stack hay. Imagine what this would look like after a gentle Rocky Mountain Front breeze.
I can remember back in the day seeing all sorts of inventions to hold down the hay. Tarps, tires, rocks, ropes, etc. I vividly remember one man's elaborate system of ropes woven together with tires tied to the ends. Still the wind won out.