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. Watch the video below to learn more about the cleanup progress and transformation happening at the Oak Ridge Site.

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Oak Ridge 101 Video 2021
Office of Environmental Management

Oak Ridge News

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Field Manager

John Arthur (Jay) Mullis, Manager


John Arthur (Jay) Mullis II serves as the Manager of the U.S. Department of Energy’s Oak Ridge Office of Environmental Management (OREM). He has served in this position since November 2017. Mullis is responsible for safely executing the environmental cleanup of the 30,000-acre Oak Ridge Reservation, which entails successfully managing the cleanup of the East Tennessee Technology Park, the Oak Ridge National Laboratory, and the Y-12 National Security Complex. 

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High-Level Budget Information

FY22 Enacted

(in the millions)

FY23 Request

(in the millions)

FY23 Enacted

(in the millions)

FY24 Request

(in the millions)
$630 $612 $637 $635

For more information on the Office of Environmental Management's budget process and performance check out the Budget & Performance page.

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