I've been spending some time in a rocky bottomed stream that contained many dams and swimming holes before the 50's. I haven't been finding anything and have been trying to figure out where the coins lost by swimmers or those tossed from bridges would go in this stream. So, I've decided that I'm going to do some "seeding" with some of the many memorials I've accumulated over the past few years. I have a feeling that coins don't travel very far due to the rocky bottom even with near flood stages during the spring. I'll let you'all know what I find next year! LOL