Santa Susana Field Laboratory
E373718
The Santa Susana Field Laboratory is a former rocket engine testing and nuclear research facility in Southern California that is now best known for its history of environmental contamination and ongoing cleanup efforts.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Santa Susana Field Laboratory canonical | 1 |
| Santa Susana Field Laboratory test facilities (heritage through Rocketdyne) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3622679 — 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: Santa Susana Field Laboratory Context triple: [Santa Susana Mountains, contains, Santa Susana Field Laboratory]
-
A.
California State University Desert Studies Center
The California State University Desert Studies Center is a field research and education facility in the Mojave Desert that supports university-level study of desert environments and ecosystems.
-
B.
University of California, Santa Cruz Fort Ord Natural Reserve
The University of California, Santa Cruz Fort Ord Natural Reserve is a protected coastal and inland habitat in Monterey County used for conservation, research, and education within the UC Natural Reserve System.
-
C.
Antelope Valley California Poppy Reserve
Antelope Valley California Poppy Reserve is a protected state natural reserve in northern Los Angeles County known for its vibrant spring displays of California poppies and other wildflowers.
-
D.
Antelope Valley
Antelope Valley is a high-desert region in Southern California known for its poppy fields, aerospace industry presence, and location at the western edge of the Mojave Desert.
-
E.
Pinyon Flat
Pinyon Flat is a high desert plateau and small community area in Southern California known for its pinyon pine woodlands and proximity to the Santa Rosa and San Jacinto Mountains National Monument.
- 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: Santa Susana Field Laboratory Target entity description: The Santa Susana Field Laboratory is a former rocket engine testing and nuclear research facility in Southern California that is now best known for its history of environmental contamination and ongoing cleanup efforts.
-
A.
California State University Desert Studies Center
The California State University Desert Studies Center is a field research and education facility in the Mojave Desert that supports university-level study of desert environments and ecosystems.
-
B.
University of California, Santa Cruz Fort Ord Natural Reserve
The University of California, Santa Cruz Fort Ord Natural Reserve is a protected coastal and inland habitat in Monterey County used for conservation, research, and education within the UC Natural Reserve System.
-
C.
Antelope Valley California Poppy Reserve
Antelope Valley California Poppy Reserve is a protected state natural reserve in northern Los Angeles County known for its vibrant spring displays of California poppies and other wildflowers.
-
D.
Antelope Valley
Antelope Valley is a high-desert region in Southern California known for its poppy fields, aerospace industry presence, and location at the western edge of the Mojave Desert.
-
E.
Pinyon Flat
Pinyon Flat is a high desert plateau and small community area in Southern California known for its pinyon pine woodlands and proximity to the Santa Rosa and San Jacinto Mountains National Monument.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
industrial research complex
ⓘ
nuclear research facility ⓘ rocket engine test facility ⓘ |
| adjacentTo |
San Fernando Valley
ⓘ
Santa Susana Pass ⓘ Simi Valley ⓘ |
| area | approximately 2,850 acres ⓘ |
| constructionBegan | 1947 ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| developedBy |
Rocketdyne
ⓘ
linked to:
Pratt & Whitney Rocketdyne
|
| endDate | 2006 ⓘ |
| environmentalIssue |
chemical contamination
ⓘ
groundwater contamination ⓘ radiological contamination ⓘ soil contamination ⓘ |
| hasFacility |
Sodium Reactor Experiment
ⓘ
liquid metal cooled experimental reactors ⓘ rocket engine test stands ⓘ |
| hasPart |
Area I
ⓘ
Area II ⓘ Area III ⓘ Area IV ⓘ Buffer Zone ⓘ |
| inception | late 1940s ⓘ |
| locatedIn |
Los Angeles County, California
ⓘ
linked to:
Los Angeles County
Simi Hills ⓘ Southern California ⓘ Ventura County, California ⓘ
linked to:
Ventura County
|
| near |
Chatsworth, Los Angeles
ⓘ
Simi Valley, California ⓘ |
| notableEvent | 1959 Sodium Reactor Experiment partial meltdown ⓘ |
| operator |
Rocketdyne
ⓘ
linked to:
Pratt & Whitney Rocketdyne
U.S. Atomic Energy Commission ⓘ
linked to:
United States Atomic Energy Commission
U.S. Department of Energy ⓘ |
| ownedBy |
Boeing
ⓘ
U.S. government (portions of site) ⓘ |
| partlyOwnedBy |
NASA
ⓘ
U.S. Department of Energy ⓘ |
| regulatingAgency |
California Department of Toxic Substances Control
ⓘ
Los Angeles Regional Water Quality Control Board ⓘ U.S. Environmental Protection Agency ⓘ |
| startDate | 1947 ⓘ |
| status |
decommissioned
ⓘ
under environmental cleanup ⓘ |
| subjectOf |
environmental cleanup agreements
ⓘ
environmental litigation ⓘ public health studies ⓘ |
| usedFor |
liquid-fueled rocket development
ⓘ
nuclear reactor research ⓘ rocket engine testing ⓘ space program engine testing ⓘ |
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: Santa Susana Field Laboratory Description of subject: The Santa Susana Field Laboratory is a former rocket engine testing and nuclear research facility in Southern California that is now best known for its history of environmental contamination and ongoing cleanup efforts.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
Pratt & Whitney Rocketdyne
→
operatedFacility
→
Santa Susana Field Laboratory test facilities (heritage through Rocketdyne)
ⓘ
linked to: Santa Susana Field Laboratory