Just as a professional follow-on to the joke, a lot of the places I've worked defined it between 50-100 years. Archeologists also have obligations to publish th

Just as a professional follow-on to the joke, a lot of the places I've worked defined it between 50-100 years. Archeologists also have obligations to publish their findings, follow ethics guidelines, work with landowner/government/descendent approval, and attempt to avoid unnecessary excavations entirely.