Hanford Site, Washington

E1260

Superfund site United States Department of Energy facility nuclear production complex

Hanford Site, Washington is a large decommissioned nuclear production complex along the Columbia River that was central to U.S. plutonium production during and after World War II and is now one of the nation’s most challenging environmental cleanup sites.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

AI illustration

All labels observed (28)

Label	Occurrences
Hanford Site	48
Hanford Engineer Works	10
Hanford plutonium production complex	5
Hanford nuclear site	3
Hanford Nuclear Reservation	2
Hanford tank farms	2
Hanford, Washington	2
Hanford, Washington, United States	2
Manhattan Project National Historical Park (Hanford unit)	2
Columbia River corridor near Hanford Site	1
Hanford	1
Hanford Generating Plant	1
Hanford Nuclear Reservation (off-route restricted area)	1
Hanford Site (historical weapons production)	1
Hanford Site 100-K Area	1
Hanford Site cleanup contractors	1
Hanford Site cleanup program	1
Hanford Site production reactors	1
Hanford Site region	1
Hanford Site tank farms	1
Hanford Site, Washington canonical	1
Hanford Site, Washington State	1
Hanford nuclear production complex	1
Hanford nuclear reservation	1
Hanford underground waste tanks	1
Site W, Hanford production complex	1
T Plant, Hanford	1
United States Department of Energy nuclear reservation at Hanford	1

How this entity was disambiguated

This entity first appeared as the object of triple T17945 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Hanford Site, Washington
Context triple: [Manhattan Project, site, Hanford Site, Washington]

A. Los Alamos, New Mexico
Los Alamos, New Mexico is a small town in northern New Mexico best known as the birthplace of the atomic bomb and a historic center of U.S. nuclear research.
B. Los Alamos Laboratory
Los Alamos Laboratory was the secret U.S. research facility in New Mexico where the Manhattan Project developed the first atomic bombs during World War II.
C. Harry S. Truman National Historic Site
Harry S. Truman National Historic Site is a preserved historic property in Independence, Missouri, that includes the longtime home and related sites associated with the 33rd U.S. president, Harry S. Truman.
D. U.S. Nuclear Regulatory Commission
The U.S. Nuclear Regulatory Commission is the federal agency responsible for overseeing and ensuring the safe use of nuclear materials and facilities in the United States.
E. Redwood National and State Parks
Redwood National and State Parks is a protected complex of national and state parks in northern California renowned for its towering ancient coast redwood forests and diverse coastal ecosystems.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Hanford Site, Washington
Target entity description: Hanford Site, Washington is a large decommissioned nuclear production complex along the Columbia River that was central to U.S. plutonium production during and after World War II and is now one of the nation’s most challenging environmental cleanup sites.

A. Los Alamos, New Mexico
Los Alamos, New Mexico is a small town in northern New Mexico best known as the birthplace of the atomic bomb and a historic center of U.S. nuclear research.
B. Los Alamos Laboratory
Los Alamos Laboratory was the secret U.S. research facility in New Mexico where the Manhattan Project developed the first atomic bombs during World War II.
C. Harry S. Truman National Historic Site
Harry S. Truman National Historic Site is a preserved historic property in Independence, Missouri, that includes the longtime home and related sites associated with the 33rd U.S. president, Harry S. Truman.
D. U.S. Nuclear Regulatory Commission
The U.S. Nuclear Regulatory Commission is the federal agency responsible for overseeing and ensuring the safe use of nuclear materials and facilities in the United States.
E. Redwood National and State Parks
Redwood National and State Parks is a protected complex of national and state parks in northern California renowned for its towering ancient coast redwood forests and diverse coastal ecosystems.
F. None of above. chosen

Statements (58)

Predicate	Object
instanceOf	Superfund site ⓘ United States Department of Energy facility ⓘ nuclear production complex ⓘ
area	approximately 1,518 square kilometers ⓘ approximately 586 square miles ⓘ
builtFor	Manhattan Project ⓘ
cleanupContractor	Bechtel National, Inc. ⓘ Hanford Mission Integration Solutions ⓘ Washington River Protection Solutions ⓘ
country	United States ⓘ linked to: United States of America
currentPrimaryActivity	environmental cleanup ⓘ
environmentalConcern	Columbia River protection ⓘ groundwater contamination ⓘ soil contamination ⓘ
established	1943 ⓘ
governingAgreement	Hanford Federal Facility Agreement and Consent Order ⓘ Tri-Party Agreement ⓘ
historicDesignation	Manhattan Project National Historical Park (Hanford unit) ⓘ linked to: Hanford Site, Washington
knownFor	major Cold War plutonium production center ⓘ one of the most contaminated nuclear sites in the United States ⓘ
locatedIn	Washington state ⓘ linked to: Washington
locatedOnRiver	Columbia River ⓘ
managedBy	U.S. Department of Energy ⓘ
nearestCity	Kennewick, Washington ⓘ linked to: Richland, Washington Pasco, Washington ⓘ Richland, Washington ⓘ
notableFacility	B Reactor National Historic Landmark ⓘ linked to: B Reactor
originalOperator	U.S. Army Corps of Engineers ⓘ
ownedBy	U.S. federal government ⓘ linked to: United States government
partOf	U.S. nuclear weapons complex ⓘ
plutoniumProductionEnded	late 1980s ⓘ
producedMaterialFor	Fat Man atomic bomb ⓘ linked to: Fat Man Trinity test device ⓘ U.S. Cold War nuclear weapons stockpile ⓘ
reactor	B Reactor ⓘ C Reactor ⓘ D Reactor ⓘ DR Reactor ⓘ linked to: D Reactor F Reactor ⓘ H Reactor ⓘ K-East Reactor ⓘ K-West Reactor ⓘ N Reactor ⓘ
reactorType	graphite-moderated plutonium production reactor ⓘ
region	Benton County, Washington ⓘ Franklin County, Washington ⓘ Grant County, Washington ⓘ
regulator	U.S. Environmental Protection Agency ⓘ linked to: United States Environmental Protection Agency Washington State Department of Ecology ⓘ
status	decommissioned nuclear production site ⓘ
storageFacility	underground double-shell tanks ⓘ underground single-shell tanks ⓘ
timePeriodOfMajorProduction	Cold War ⓘ World War II ⓘ
wartimePurpose	plutonium production for nuclear weapons ⓘ
wasteType	high-level radioactive waste ⓘ mixed hazardous and radioactive waste ⓘ transuranic waste ⓘ

How these facts were elicited

Referenced by (95)

Full triples — surface form annotated when it differs from this entity's canonical label.

Manhattan Project → site → Hanford Site, Washington ⓘ

Manhattan Engineer District → responsibleFor → Hanford Engineer Works ⓘ

subject linked to: Manhattan Engineer District of the U.S. Army Corps of Engineers