The nuclear waste buried far beneath the earth will be toxic for thousands of years. How do you build a warning now that can be understood in the far future?
“This place is not a place of honor,” reads the text. “No highly esteemed dead is commemorated here… nothing valued is here. What is here was dangerous and repulsive to us. This message is a warning about danger.”
It sounds like the kind of curse that you half-expect to find at the entrance to an ancient burial mound. But this message is intended to help mark the site of the Waste Isolation Pilot Project (WIPP) that has been built over 2,000 feet (610m) down through stable rocks beneath the desert of New Mexico. The huge complex of tunnels and caverns is designed to contain the US military’s most dangerous nuclear waste.
This waste will remain lethal longer than the 300,000 years Homo sapiens has walked across the surface of the planet. WIPP is currently the only licensed deep geological disposal repository in operation in the world. A similar facility should also open in Finland in the mid-2020s.
When the facility is full sometime in the next 10 to 20 years, the caverns will be collapsed and sealed with concrete and soil. The sprawling complex of buildings that currently mark the site will be erased. In its place will be “our society’s largest conscious attempt to communicate across the abyss of deep time”.
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The plan calls for huge 25ft (7.6m) tall granite columns marking the four-sq-mile (10 sq km) outer boundary of the entire site. Inside this perimeter, there is an earth berm 33ft (10m) tall and 100ft (30m) wide marking the repository’s actual footprint. Then inside the berm will be another square of granite columns.
At the centre of this monumental “Do Not Enter” sign will be a room containing information about the site. In case the information becomes unreadable, there will be another buried 20ft below, and another buried in the earth barrier itself. Detailed information about the WIPP will be stored in many archives around the world on special paper stamped with the instruction that it must be kept for 10,000 years, the rather arbitrary length of the site’s license.
