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Just announced: the National Archives Catalog is undergoing unscheduled maintenance

and will be unavailable until January 2, 2018 at the latest. We apologize for the inconvenience.

This blog post is an update of the original blog Archives II Ground Floor Maintenance, starting December 8 that was posted on November 21, 2017.


Work dates are now December 22 - January 18.


The National Archives at College Park (Archives II) will undergo temporary closures in the Researcher Registration Room 1000 and part of the ground floor security entrance to the research complex between December 22, 2017 and January 18, 2018.


Researcher Registration Room 1000

Room 1000 will have a temporary closure during a re-cabling improvement project. Due to the nature of the work, the project may extend beyond mid-January. The temporary location for researcher orientation and researcher cards will be conducted at a desk in the main ground floor lobby.


Security Entrance to Research Complex

The ground floor security entrance to the research complex will have a temporary and only partial closure. Researchers will have full access to the research rooms but please anticipate longer wait times to enter and exit the research complex. The work will be done at the same time as Room 1000.


We will continue to post updates and have status information on the main phone line (301-837-2000) for Archives II. We appreciate your patience.


Please submit questions to Michael Knight, Branch Chief, Research Services, Research Room Operations at 301-837-0475 or

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The 21,655 photographs in this series depict all aspects of Sandia National Laboratories' unclassified work on nuclear weapons testing between 1972 through 1992 at the Nevada Test Site (NTS). Photographs reflect Sandia National Laboratories' mission to ensure that the United States nuclear arsenal is safe, secure, reliable, and able to support the United States' deterrence policy.


View all of these photos in the National Archives Catalog: Photographs Related to Nuclear Weapons Testing at the Nevada Test Site, 1/1972 - 12/2012


The majority of photographs depict various equipment, personnel, and operations related to underground nuclear tests. In addition, other photographs in this series depict High Explosive tests at Nevada Test Site; Coal Gasification Experiment at Hanna, Wyoming; the Solar Power Project; Waste Disposal at Oak Ridge, Tennessee; Oil Shale Project at Rock Springs, Wyoming; as well as other non-nuclear tests and experiments.


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