Castle on the Hill

The Administration Building for the Clinton Engineering Works opened March 15, 1943. Dubbed "The Castle," it became headquarters for the Manhattan Engineering District, U.S. Army Corps of Engineers, from which all Manhattan Project construction was directed from 1943 to 1945. The Atomic Energy Commission assumed control of the property on January 1, 1947. "The Castle" was demolished and replaced by the Federal Building in 1970.

Oak Ridge, Tennessee · United States