Looking for a 'tool' or method to best way to secure a fairly large low water crossing along a county road. This has been an ongoing issue with individuals parking along the roadway, and walking upstream, but I have also had issues with everything from ATV's, dirt bikes, pickups, and most recently (Saturday night) a UTV with about 4-6 passengers. Saturday night convinced me I need to find some method of at least trying to secure the property along the roadway/bridge. Usually when I confront these individuals the story is "I am within the stream or banks, so I can go where I like". While laws vary from state to state, I have researched my situation and since this is a smaller stream, and not considered "navigable" the landowner controls the stream, therefore anyone leaving the roadway is trespassing, and in any instance "wheeled vehicles" are not allowed in the stream unless it is the landowner, and only to cross from one side to the other. Unfortunately, in most instances these individuals "know" they are right, and usually under the influence of something, be it beer or other substances, and can be difficult to convince otherwise. I did get their attention when I informed them they had to free their $15,000 UTV without assistance from another vehicle as I was calling a conservation agent to assist removing them and it from my property. Initial thoughts on securing the property are to attach a cable from one bank to the other with a breakaway on one bank to allow the cable to simply swing away in the event of a large log or object going downstream during a flood. This stream is roughly 100 feet bank to bank, and while it currently has a slab crossing with metal culverts it gets very large and can easily take out any type of normal fencing materials that are in the stream bed. Any ideas or anyone with similar scenario? Obviously I would rather not put a large investment into something that could end up in the next county in an event such as we had a couple years ago when I experienced debris in trees 8-10 feet in trees over the banks. I know some will insist on ignoring anything I place there, but at least they will be warned and forced to either tear it down or go over/around it, and deter at least a few but the most determined.