When the AEC was forced to take atomic testing underground due to the Limited Test Ban of 1963, they drilled mile-deep holes into which they lowered tests and instrumentation. This hole was 88″ (223cm) in diameter and 5000+ feet deep. This is not a hole into which one would like to fall. So the crews built ‘shaft collars’ and some got festooned with humorous signs. This one sits in Area 25.
For additional art, click on Collections buttons for drop-down menus
[cc_product sku=”960510-16-4-to-die-for-nts” display=”vertical” quantity=”true” price=”true”]