Iowa Ordnance Plant
E102488
The Iowa Ordnance Plant was a World War II–era munitions manufacturing facility in Iowa that played a role in the U.S. nuclear weapons program as part of the Manhattan Project.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Iowa Army Ammunition Plant | 2 |
| Iowa Ordnance Plant canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T847316 — 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: Iowa Ordnance Plant Context triple: [Manhattan Project sites, hasPart, Iowa Ordnance Plant]
-
A.
Weldon Spring Ordnance Works
Weldon Spring Ordnance Works was a major World War II-era munitions and later uranium-processing facility in Missouri that became part of the Manhattan Project and is now known for its extensive environmental cleanup.
-
B.
Watertown Arsenal
Watertown Arsenal is a historic former U.S. Army ordnance and research facility in Watertown, Massachusetts, that played a key role in American military manufacturing and technology development.
-
C.
Redstone Arsenal, Alabama
Redstone Arsenal, Alabama is a major U.S. Army installation and technology hub known for its central role in missile, space, and defense research and development.
-
D.
Pueblo Chemical Depot
Pueblo Chemical Depot is a U.S. Army installation in Colorado historically used for the storage and destruction of chemical weapons.
-
E.
Łucznik Arms Factory
Łucznik Arms Factory is a Polish state-owned firearms manufacturer best known for producing military rifles and small arms, including modern service weapons for Poland’s armed forces.
- 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: Iowa Ordnance Plant Target entity description: The Iowa Ordnance Plant was a World War II–era munitions manufacturing facility in Iowa that played a role in the U.S. nuclear weapons program as part of the Manhattan Project.
-
A.
Weldon Spring Ordnance Works
Weldon Spring Ordnance Works was a major World War II-era munitions and later uranium-processing facility in Missouri that became part of the Manhattan Project and is now known for its extensive environmental cleanup.
-
B.
Watertown Arsenal
Watertown Arsenal is a historic former U.S. Army ordnance and research facility in Watertown, Massachusetts, that played a key role in American military manufacturing and technology development.
-
C.
Redstone Arsenal, Alabama
Redstone Arsenal, Alabama is a major U.S. Army installation and technology hub known for its central role in missile, space, and defense research and development.
-
D.
Pueblo Chemical Depot
Pueblo Chemical Depot is a U.S. Army installation in Colorado historically used for the storage and destruction of chemical weapons.
-
E.
Łucznik Arms Factory
Łucznik Arms Factory is a Polish state-owned firearms manufacturer best known for producing military rifles and small arms, including modern service weapons for Poland’s armed forces.
- F. None of above. chosen
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
United States military installation
ⓘ
munitions plant ⓘ |
| associatedWith | U.S. nuclear weapons program ⓘ |
| constructedDuring | World War II ⓘ |
| coordinateSystem | geographic coordinates ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| era | World War II ⓘ |
| hasEnvironmentalIssues |
contamination from explosives
ⓘ
contamination from radioactive materials ⓘ |
| laterRenamed |
Iowa Ordnance Plant
self-linksurface differs
ⓘ
surface form:
Iowa Army Ammunition Plant
|
| locatedIn |
Des Moines County, Iowa
ⓘ
Iowa ⓘ |
| locatedOn | former agricultural land in southeastern Iowa ⓘ |
| near | Burlington, Iowa ⓘ |
| notableFor | role in early U.S. nuclear weapons production ⓘ |
| operatedBy | United States Army ⓘ |
| ownedBy |
United States Department of the Army
ⓘ
surface form:
U.S. Department of the Army
|
| partOf |
Manhattan Project
ⓘ
U.S. Army ammunition industrial base ⓘ United States Ordnance Department ⓘ
surface form:
United States Army Ordnance Department
|
| produced |
artillery shells
ⓘ
bombs ⓘ nuclear weapon components ⓘ small arms ammunition ⓘ |
| startDate | 1941 ⓘ |
| subjectOf |
U.S. Army environmental remediation programs
ⓘ
U.S. Department of Energy historical studies ⓘ |
| successor |
Iowa Ordnance Plant
self-linksurface differs
ⓘ
surface form:
Iowa Army Ammunition Plant
|
| usedFor |
munitions manufacturing
ⓘ
production of conventional ammunition ⓘ production of nuclear weapons components ⓘ |
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: Iowa Ordnance Plant Description of subject: The Iowa Ordnance Plant was a World War II–era munitions manufacturing facility in Iowa that played a role in the U.S. nuclear weapons program as part of the Manhattan Project.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Iowa Army Ammunition Plant
this entity surface form:
Iowa Army Ammunition Plant