The Oak Ridge Site, located in eastern Tennessee, is one of the three original sites in the Manhattan Project. The K-25 and Y-12 plants were built to explore different methods to enrich uranium, while the X-10 Site was established as a pilot plant for the Graphite Reactor and to explore methods for the production of plutonium. Throughout the following decades, the three sites purified isotopes, conducted advanced research, manufactured weapons components, and enriched uranium. These activities created environmental legacies that placed the Oak Ridge Reservation on EPA’s National Priorities List in 1989.
Oak Ridge Photo Gallery
An aerial view of the Alpha-2 facility at the Y-12 National Security Complex after crews completed demolition on its south side. The building measures 325,000 square feet and covers 2.5 acres of land.
Oak Ridge News
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Oak Ridge Office of Environmental Management Manager Erik Olds and Savannah River Operations Office Manager Edwin Deshong joined U.S. Department of Energy Under Secretary for Science Darío Gil for a U.S. House Nuclear Cleanup Caucus event. July 28, 2026July 28, 2026
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Oak Ridge Office of Environmental Management contractor United Cleanup Oak Ridge recently honored six small businesses whose work has advanced key cleanup projects this year. July 28, 2026July 28, 2026
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An innovative workaround enables the U.S. Department of Energy’s Oak Ridge Office of Environmental Management to advance its highest priority cleanup project at Oak Ridge National Laboratory and save taxpayers $175 million. July 21, 2026July 21, 2026
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Oak Ridge Office of Environmental Management cleanup crews are removing radioactive materials from Building 3029, a legacy production lab at Oak Ridge National Laboratory. July 7, 2026July 7, 2026
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The Oak Ridge Office of Environmental Management has wrapped up a four-year risk reduction effort at a legacy facility after contractor United Cleanup Oak Ridge removed 447 containers of legacy waste from it, moving crews closer to the start of full-scale deactivation and eventual demolition. June 30, 2026June 30, 2026
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Oak Ridge Office of Environmental Management crews have prepared a cluster of highly contaminated buildings for teardown on one of the most challenging footprints at Oak Ridge National Laboratory after finishing deactivation work there. June 23, 2026June 23, 2026
Site Manager
Erik Olds became the manager for the DOE Oak Ridge Office of Environmental Management (OREM) on June 1, 2025.
Olds previously served at the OREM deputy manager since January 2024, serving as the acting manager from March to June 2025. He has been with the Department of Energy for more than 30 years, including 20 years within the EM program.
As the OREM manager, he oversees the daily operations needed to perform the organization’s environmental cleanup and stewardship, decontamination and decommissioning activities, waste processing and management, surveillance and maintenance programs, and procurement and contract functions. Before his assignment as OREM deputy manager, Olds served as communications director for DOE's Office of Environmental Management headquarters (EM-HQ) and previously as acting chief of staff for EM-HQ.
Click here to view full bio.
High-Level Budget Information
FY25 Requested (in the millions) | FY25 Enacted (in the millions) | FY26 Requested (in the millions) | FY26 Enacted (in the millions) | FY27 Requested (in the millions) |
| $658 | $695 | $636 | $701 | $604 |
For more information on the Office of Environmental Management's budget process and performance check out the Budget & Performance page.