Background

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. Prepared by multiple authors under the general editorship of Gavin Hadden, a longtime civil employee of the Army Corps of Engineers, 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, photographs, and detailed indices. Only a handful of copies of the history were prepared. The Department of Energy’s Office of History and Heritage Resources is custodian of one of these copies.

The history is arranged in thirty-six volumes grouped in eight books. Some of the volumes were further divided into stand-alone chapters. Several of the volumes and stand-alone chapters were never security classified. Many of the volumes and chapters were declassified at various times and were available to the public on microfilm. Approximately a third of the volumes, or parts of volumes, remain classified.

The Office of Classification and the Office of History and Heritage Resources, in collaboration with the Department’s Office of Science and Technical Information, have committed to making available full-text on this OpenNet website the entire thirty-six volume Manhattan District History. Unclassified and declassified volumes will be scanned and posted as available. Classified volumes will be declassified with redactions, i.e., still classified terms, phrases, sentences, and paragraphs will be removed and the remaining unclassified parts made available to the public. The volumes will be posted incrementally as review and processing is completed.

Following is a listing of the books, volumes, and stand-alone chapters of the Manhattan District History. Links to pdf copies are provided for those volumes and chapters that currently are available.

Document Archive

[ 13,904 Pages Total ]

Book I General

    blank Volume 1 – General

      blank Volume 1 – General Appendix E; General Index

        Volumes 2 and 3 were not prepared by the Manhattan Engineer District

          Volume 4 – Auxiliary Activities

          blank Chapter 1 – Legislative Contacts of Manhattan District

          blank Chapters 2 through Chapter 5 – Foundation of the National Laboratories (Ch. 2); Program for Production and distribution of radioisotopes (Ch. 3); Research and Development of Atomic Energy for Power (Ch. 4); and Declassification and Distribution of Project Information (Ch. 5)

          blank Chapter 6 – Investigation of the After Effects of the Bombing in Japan

          blank Chapter 7 – Contributions of Representatives of the Manhattan District to the Discussions and Proposals for International Control

          blank Chapter 8 – Press Releases – Part 1

          blank Chapter 8 – Press Releases – Part 2

          blank Chapter 9 & 10 – Assistance on the Canadian Pile Project (Ch. 9); and the Oak Ridge Institute of Nuclear Studies (Ch. 10)

          blank Chapter 11 – Ames Project

          blank Chapter 12 – Activities of the National Bureau of Standards

          blank Chapter 13 – Preparation and Publication of the Smyth Report

          blank Chapter 14 – Investigation of Miscellaneous Processes of Separation of Uranium Isotopes

            blank Volume 5 – Fiscal Procedures

              blank Volume 5 – Fiscal Procedures Appendices

                blank Volume 6 – Insurance Program and Supplement

                  blank Volume 7 – Medical Program

                    blank Volume 7 – Medical Program Supplement

                      blank Volume 8 – Personnel

                        blank Volume 9 – Priorities Program

                          blank Volume 10 – Land Acquisition CEW

                            blank Volume 10 – Land Acquisition CEW Appendices

                              blank Volume 11 – Safety Program

                                blank Volume 11 – Safety Program Appendix G

                                  blank Volume 12 – Clinton Engineer Work – Central Facilities

                                    blank Volume 12 – Clinton Engineer Work – Central Facilities Appendices A, B, & C

                                      blank Volume 12 – Clinton Engineer Work – Central Facilities Appendices D

                                        blank Volume 13 – Patents

                                          Volume 14 – Intelligence & Security

                                            blank Volume 14 – Intelligence & Security- Supplement (w/Appendices)

                                              Volume 14 – Intelligence & Security – Foreign Intelligence Supplement No. 1

                                                blank Volume 14 – Intelligence & Security – Foreign Intelligence Supplements Nos. 2 & 3

                                                  blank Volume 14 – Intelligence & Security – Top Secret Appendix to Supplement

                                                   

                                                  Book II Gaseous Diffusion (K-25) Project

                                                    blank Volume 1 – General Features

                                                      blank Volume 2 – Research

                                                        blank Volume 3 – Design

                                                          blank Volume 4 – Construction

                                                            blank Volume 5 – Operations

                                                              blank Volume 5 – Operations – Supplement No. 1

                                                                blank Volume 5 – Operations – Appendix

                                                                blank Book III The P-9 Project

                                                                 

                                                                Book IV Pile Project X-10

                                                                  blank Volume 1 – General Features

                                                                    blank Volume 2 – Research Part I – Metallurgical Laboratory

                                                                      blank Volume 2 – Research Part II – Clinton Laboratories

                                                                        blank Volume 2 – Research Part II – Clinton Laboratories – Top Secret Appendix

                                                                          blank Volume 3 – Design

                                                                            blank Volume 3 – Design Appendices A, B, C, D

                                                                              blank Volume 4 – Land Acquisition, HEW

                                                                                blank Volume 4 – Land Acquisition, HEW Appendices A, B, C, D, E

                                                                                  blank Volume 5 – Construction

                                                                                    blank Volume 5 – Construction – Appendix A

                                                                                      blank Volume 5 – Construction – Appendices B, C, D, & E

                                                                                        blank Volume 6 – Operation

                                                                                          blank Volume 6 – Operations – Appendix A

                                                                                            blank Volume 6 – Operations – Appendices B, C, D, E

                                                                                              blank Volume 6 – Operations – Top Secret Appendix

                                                                                               

                                                                                              Book V Electromagnetic Project

                                                                                                blank Volume 1 – General Features

                                                                                                  blank Volume 2 – Research

                                                                                                    blank Volume 3 – Design

                                                                                                      blank Volume 4 – Silver Program

                                                                                                        blank Volume 5 – Construction

                                                                                                          blank Volume 6 – Operation

                                                                                                          blank Book VI Liquid Thermal Diffusion (S-50) Project – Secret Supplement

                                                                                                           

                                                                                                          Book VII Feed Materials, Special Procurement, and Geographical Exploration

                                                                                                            blank Volume 1 – Feed Materials and Special Procurement

                                                                                                              blank Volume 2 – Geographical Exploration

                                                                                                               

                                                                                                              Book VIII Los Alamos Project (Y)

                                                                                                                blank Volume 1 – General

                                                                                                                  blank Volume 1 – General Appendices A, B, C, D

                                                                                                                    blank Volume 1 – General Appendices E, F

                                                                                                                      blank Volume 2 – Technical

                                                                                                                        blank Volume 2 – Technical Supplement

                                                                                                                         

                                                                                                                          Volume 3 – Auxiliary Activities

                                                                                                                          blank Chapter 1 – Los Angeles Procurement Office

                                                                                                                          blank Chapter 2 – Project Camel

                                                                                                                          blank Chapter 3 – Activities of Ohio State University Cryogenic Laboratory

                                                                                                                          blank Chapter 4 – Dayton Project

                                                                                                                          blank Chapter 5 and 6 – Navy Participation (Ch. 5) and Sandia (Ch. 6)

                                                                                                                          blank Chapter 7 – Boron

                                                                                                                          blank Chapter 8 – Operation Crossroads

                                                                                                                          blank Chapter 9 – Supplementary Activities

                                                                                                                          blank History of the Activities of the Manhattan District Research

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