In accordance with section 1805 of the Atomic Energy Act of 1954, as amended by the Energy Policy Act of 1992, the Department of Energy is providing the sixth Triennial Report to Congress on the progress of the Uranium Enrichment Decontamination and Decommissioning Fund (UED&D Fund). In the last report submitted to Congress in January 2008, the Department concluded that in no case was the UED&D Fund sufficient to complete the cleanup activities at the three Gaseous Diffusion Plants located in Oak Ridge, Tennessee; Piketon, Ohio; and Paducah, Kentucky. The January 2008 report estimated that the UED&D Fund shortfall was about $10.9 billion, and the fund would be exhausted by 2022. This report updates the Congress on the progress and success of the cleanup over the last three years. The UED&D Fund remains insufficient. The shortfall is now estimated at $11.8 billion, with the fund predicted to be exhausted by 2020. However, there are inherent uncertainties associated with planning for large complex projects and as they progress through their life cycle, the Department's goals is to reduce this uncertainty with higher quality work estimates, good faith regulatory negotiations and project management oversight and controls.