Back in the early seventies I would be invited to the McDonnel Douglas Fishing club, Gravois arm I believe, maybe Bogue Creek. We could see the bottom past 10' in most places. I noticed a couple of times that a small barge would come by and spray the water for squiters. No bugs, no frogs. There is also a high BOD (biological oxygen demand) on that water. It's not as healthy as some want to promote.