i was told my fish and wildlife that it is not legal to sink anything in ky waters. but i was also told that on cumberland you can try to get a permit to sink stuff. but you have to pick a zone (i think he said cum. had 6 zones or so) but the permit is hard to get. or you can talk to the game warden and see if he has a problem with it.
i know people sink stuff at green all the time but they can get a ticket for it.