The Department of Energy traces its origins to World War II and the Manhattan Project effort to build the first atomic bomb. As the direct descendent of the Manhattan Engineer District, the organization set up by the Army Corps of Engineers to develop and build the bomb, the Department continues to own and manage the Federal properties at most of the major Manhattan Project sites, including Oak Ridge, Tennessee; Hanford, Washington; and Los Alamos, New Mexico.
The Manhattan Project: Resources is a joint collaboration between the Department of Energy’s Office of Classification and Office of History and Heritage Resources. This effort is designed to disseminate information and documentation on the Manhattan Project to a broad audience including scholars, students, and the general public. The Manhattan Project: Resources consists of two parts:
General Leslie Groves, head of the Manhattan Engineer District, in
late 1944 commissioned a multi-volume history of the Manhattan Project
called the Manhattan District History. The classified
history was "intended to describe, in simple terms, easily
understood by the average reader, just what the Manhattan
District did, and how, when, and where." The volumes record
the Manhattan Project’s activities and achievements in
research, design, construction, operation, and administration,
assembling a vast amount of information in a systematic, readily
available form. The Manhattan District History contains
extensive annotations, statistical tables, charts, engineering
drawings, maps, and photographs. Only a handful of copies of the
history were prepared.
The Office of Classification and the Office of History and Heritage Resources, in collaboration with the Department’s Office of Scientific and Technical Information, have made the full-text of the entire thirty-six volume Manhattan District History available on this website. Some of the volumes were unclassified. Some have been declassified in full. Other volumes have been declassified with redactions, i.e., still classified terms, phrases, sentences, and paragraphs are removed and the remaining unclassified parts made available to the public. All the volumes have been posted.