That's a matter of law, and I don't know what the law says here, much less TN. However, the common sense approach would say that property markers have to be replaced, since they belong to you and your neighbor. State jobs here usually specify that any property corners that are disturbed must be replaced. YMMV with lower status jobs, and some random contractor coming through is more likely to damage stuff.
There's a lot of ifs ands and buts, but two most common scenarios are the property goes to the center of the road, or the property goes to the RoW line. In both cases, the marker is typically set at the RoW line, and that's where it should be after construction. It shouldn't be moved back unless it's a very old property that perhaps didn't have the marker on the RoW, or the RoW widened over time.
You can also get some weird situations where it isn't physically possible to set the marker on the RoW. In that case, you might move it back along the property line, and inform the client of what has been done, so even though they won't have the exact front corner, they at least have the sideline marked for a fence or whatever. That's not my favorite thing to do cause it's weird, but a competent future surveyor should be able to figure out what's going on, and not screw anything up, but it is non standard, and I don't like it.
There's a lot of ifs ands and buts, but two most common scenarios are the property goes to the center of the road, or the property goes to the RoW line. In both cases, the marker is typically set at the RoW line, and that's where it should be after construction. It shouldn't be moved back unless it's a very old property that perhaps didn't have the marker on the RoW, or the RoW widened over time.
You can also get some weird situations where it isn't physically possible to set the marker on the RoW. In that case, you might move it back along the property line, and inform the client of what has been done, so even though they won't have the exact front corner, they at least have the sideline marked for a fence or whatever. That's not my favorite thing to do cause it's weird, but a competent future surveyor should be able to figure out what's going on, and not screw anything up, but it is non standard, and I don't like it.