With dozens of cement trucks, two large batch plants and more than 1,000 workers scurrying about the Savannah River Site in South Carolina, the former nuclear-weapons production site appears to be a massive construction project.

In fact, the activity now supports a massive deconstruction project, boosted by a $1.4-billion federal stimulus infusion, to accelerate decommissioning and demolition of 75% of the legacy mission of the 310-sq-mile U.S. Energy Dept. site near Aiken before 2012.