The Paducah Gaseous Diffusion Plant (PGDP) was constructed in 1952 to produce enriched uranium, initially for the nation’s nuclear weapons program and later for nuclear fuel for commercial power plants. The plant is owned by the Department of Energy (DOE), which oversees environmental cleanup activities at the site, including environmental remediation, waste management, depleted uranium conversion, and decontamination and decommissioning. Commercial enrichment was conducted under lease from 1993 until 2013 when operations ceased and the gaseous diffusion facilities were returned to the DOE Environmental Management (EM) program. EM has conducted extensive cleanup activities at the site since the late 1980s and is currently deactivating the returned plant facilities while continuing the aggressive remediation program being managed by its Portsmouth/Paducah Project Office.