Hanford Site, Washington
E1260
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.
All labels observed (25)
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 of America
ⓘ
surface form:
United States
|
| 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 |
Hanford Site, Washington
self-linksurface differs
ⓘ
surface form:
Manhattan Project National Historical Park (Hanford unit)
|
| knownFor |
major Cold War plutonium production center
ⓘ
one of the most contaminated nuclear sites in the United States ⓘ |
| locatedIn |
Washington
ⓘ
surface form:
Washington state
|
| locatedOnRiver | Columbia River ⓘ |
| managedBy | U.S. Department of Energy ⓘ |
| nearestCity |
Richland, Washington
ⓘ
surface form:
Kennewick, Washington
Pasco, Washington ⓘ Richland, Washington ⓘ |
| notableFacility |
B Reactor
ⓘ
surface form:
B Reactor National Historic Landmark
|
| originalOperator | U.S. Army Corps of Engineers ⓘ |
| ownedBy |
United States government
ⓘ
surface form:
U.S. federal government
|
| partOf | U.S. nuclear weapons complex ⓘ |
| plutoniumProductionEnded | late 1980s ⓘ |
| producedMaterialFor |
Fat Man
ⓘ
surface form:
Fat Man atomic bomb
Trinity test device ⓘ U.S. Cold War nuclear weapons stockpile ⓘ |
| reactor |
B Reactor
ⓘ
C Reactor ⓘ D Reactor ⓘ D Reactor ⓘ
surface form:
DR 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 |
United States Environmental Protection Agency
ⓘ
surface form:
U.S. 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
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Hanford Site, Washington Description of subject: 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.
Referenced by (81)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Hanford Site
this entity surface form:
Hanford Site
this entity surface form:
Hanford Nuclear Reservation
this entity surface form:
Hanford Site
this entity surface form:
Hanford Engineer Works
this entity surface form:
Hanford Engineer Works
subject surface form:
Leslie R. Groves Jr.
this entity surface form:
Hanford Engineer Works
subject surface form:
Eastern Washington
this entity surface form:
Hanford Site
this entity surface form:
Hanford Site
this entity surface form:
Hanford Site
this entity surface form:
Hanford Engineer Works
this entity surface form:
Hanford Site
this entity surface form:
Hanford Site
Nuclear Waste Program (Washington State Department of Ecology)
→
overseesSite
→
Hanford Site, Washington
ⓘ
this entity surface form:
Hanford Site
subject surface form:
Waste Treatment and Immobilization Plant
this entity surface form:
Hanford Site
subject surface form:
Waste Treatment and Immobilization Plant
this entity surface form:
Hanford Site cleanup program
Waste Treatment and Immobilization Plant (Hanford WTP)
→
associatedWith
→
Hanford Site, Washington
ⓘ
subject surface form:
Waste Treatment and Immobilization Plant
this entity surface form:
Hanford underground waste tanks
subject surface form:
Office of River Protection
this entity surface form:
Hanford Site
subject surface form:
Office of River Protection
this entity surface form:
Hanford Site tank farms
subject surface form:
Office of River Protection
this entity surface form:
Hanford Site
this entity surface form:
Hanford Site
this entity surface form:
Hanford Site cleanup contractors
this entity surface form:
Hanford Site
this entity surface form:
Hanford Site
subject surface form:
LIGO Hanford Observatory
this entity surface form:
Hanford, Washington, United States
this entity surface form:
Hanford Nuclear Reservation (off-route restricted area)
this entity surface form:
Hanford Site
this entity surface form:
Hanford Site
this entity surface form:
Hanford Site region
this entity surface form:
Hanford Site