OK, this sounds like a dumb question, and maybe it is. But I'm still curious. We've all probably seen nature movies showing salmon leaping and fighting their way up cascading water. I imagine that this was how it looked at Willamette Falls before the falls were modified and the ladder was built. But what about an obstacle like Middle Falls on Eagle Creek. That drop has to be at least 25 feet straight down. The water comes over the top and dosen't hit anything till it reaches the water below. How is any fish supposed to make that leap? There is a ladder around the falls today. Pre-ladder was this as far as salmon and steelhead got?