I did a search and didn't see much of the sort come up but I apologize if there's already a thread on this but we just put a new course in on a river system that is affected by roughly 18" of tide. At low tide a couple of my turn buoys can get as low as 4.5 feet. Just wondering what people consider too shallow? I know some man made lakes are pretty close to this depth but what are people's thoughts on the matter? Also, how would a ski react differently in shallow water as opposed to deep water? The depth here can go from 4.5 feet at 2 ball to >8 feet at 3 ball.