Nevada Test Site
United States Department of Energy reservation located in southeastern Nye County, Nevada
The Nevada National Security Site (NNSS; N2S2) initially named the Nevada Proving Ground (1951–1955), and later the Nevada Test Site (NTS; 1955–2010)) is a reservation of the United States Department of Energy located in the southeastern portion of Nye County, Nevada, approximately 65 mi (105 km) northwest of Las Vegas.
The site was established in December 1950 when President Harry S. Truman authorized the designation of a portion of the Nellis Air Force Gunnery and Bombing Range for testing American nuclear devices by the US Atomic Energy Commission (AEC).
The first atmospheric test was conducted at the site's Frenchman Flat area by the AEC on January 27, 1951. About 928 nuclear tests were conducted here through 1992, when the United States stopped its underground nuclear testing.
The site consists of about 1,350 sq mi (3,500 km2) of desert and mountainous terrain. Some 1,100 buildings in 28 areas are connected by 400 mi (640 km) of paved roads, 300 mi (480 km) of unpaved roads, ten heliports, and two airstrips. The site is privately managed and operated by Mission Support and Test Services LLC, a joint venture of Honeywell, Jacobs, and Huntington Ingalls, on behalf of the National Nuclear Security Administration (NNSA).
The mushroom clouds from the 100 atmospheric tests were visible from almost 100 mi (160 km) away; they could be seen from the Las Vegas Strip in the early 1950s. Many iconic images at nuclear science museums throughout the United States come from the site. Las Vegas experienced noticeable seismic effects.
This brief starts where responsible research should: with the source description of “Nevada Test Site” as united States Department of Energy reservation located in southeastern Nye County, Nevada. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the places & architecture register because the source frames it as united States Department of Energy reservation located in southeastern Nye County, Nevada. Its deeper value depends on whether names, dates, institutions and citations support that framing.
The strongest evidence will usually combine a dated visual record with documents produced by the authority responsible for the place. The source revision retrieved here is dated Aug 29, 2026. The linked authority identifier is Q1344605. VIAF identifies the subject as 315130552. The Library of Congress control number is sh89005786. Authority coordinates are 37.117, -116.050. 3 of 5 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 1951, 1955, 2010 and 1950.
Modern boundaries and familiar names can conceal earlier jurisdictions or structures that do not align with the present site. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
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Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
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Questions for further research
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This entry incorporates text from “Nevada Test Site” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.