Red Rock Dam
E94234
Red Rock Dam is a large flood-control and hydroelectric dam on the Des Moines River in central Iowa, forming Lake Red Rock as the state’s largest reservoir.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Red Rock Dam canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T687138 — 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: Red Rock Dam Context triple: [Marion County, Iowa, contains, Red Rock Dam]
-
A.
Hollywood Dam
Hollywood Dam is a concrete arch-gravity dam in the Hollywood Hills of Los Angeles that impounds the Hollywood Reservoir as part of the city’s water supply system.
-
B.
McNary Dam
McNary Dam is a large hydroelectric dam and navigation lock complex on the Columbia River in the Pacific Northwest of the United States.
-
C.
Conklingville Dam
Conklingville Dam is a concrete gravity dam in New York that created the Great Sacandaga Lake reservoir for flood control and hydroelectric power generation.
-
D.
Castaic Dam
Castaic Dam is a large embankment dam in Los Angeles County, California, that forms Castaic Lake and plays a key role in water storage and hydroelectric power generation for Southern California.
-
E.
Bonneville Dam
Bonneville Dam is a major hydroelectric and navigation dam on the Columbia River in the Pacific Northwest, known for power generation, fish ladders, and its role in regional river management.
- 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: Red Rock Dam Target entity description: Red Rock Dam is a large flood-control and hydroelectric dam on the Des Moines River in central Iowa, forming Lake Red Rock as the state’s largest reservoir.
-
A.
Hollywood Dam
Hollywood Dam is a concrete arch-gravity dam in the Hollywood Hills of Los Angeles that impounds the Hollywood Reservoir as part of the city’s water supply system.
-
B.
McNary Dam
McNary Dam is a large hydroelectric dam and navigation lock complex on the Columbia River in the Pacific Northwest of the United States.
-
C.
Conklingville Dam
Conklingville Dam is a concrete gravity dam in New York that created the Great Sacandaga Lake reservoir for flood control and hydroelectric power generation.
-
D.
Castaic Dam
Castaic Dam is a large embankment dam in Los Angeles County, California, that forms Castaic Lake and plays a key role in water storage and hydroelectric power generation for Southern California.
-
E.
Bonneville Dam
Bonneville Dam is a major hydroelectric and navigation dam on the Columbia River in the Pacific Northwest, known for power generation, fish ladders, and its role in regional river management.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
dam
ⓘ
flood control structure ⓘ hydroelectric dam ⓘ reservoir ⓘ |
| continent | North America ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| describedAs | Iowa's largest reservoir ⓘ |
| formedByDam | Red Rock Dam self-linksurface differs ⓘ |
| formsReservoir | Lake Red Rock ⓘ |
| hasReservoir | Lake Red Rock ⓘ |
| locatedIn |
Iowa
ⓘ
Marion County, Iowa ⓘ central Iowa ⓘ |
| locatedInCountry |
United States of America
ⓘ
surface form:
United States
United States of America ⓘ
surface form:
United States
|
| locatedOnRiver | Des Moines River ⓘ |
| managingAgency | U.S. Army Corps of Engineers ⓘ |
| nearestCity |
Knoxville, Iowa
ⓘ
Pella, Iowa ⓘ |
| ownedBy | U.S. Army Corps of Engineers ⓘ |
| partOf |
Des Moines River
ⓘ
surface form:
Des Moines River flood control system
|
| primaryFunction | flood control ⓘ |
| purpose |
flood risk reduction
ⓘ
recreation support via Lake Red Rock ⓘ water resource management ⓘ |
| regionServed |
Des Moines River
ⓘ
surface form:
Des Moines River valley
downstream communities in Iowa ⓘ |
| riverBasin |
Des Moines River
ⓘ
surface form:
Des Moines River basin
|
| secondaryFunction | hydroelectric power generation ⓘ |
| state | Iowa ⓘ |
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: Red Rock Dam Description of subject: Red Rock Dam is a large flood-control and hydroelectric dam on the Des Moines River in central Iowa, forming Lake Red Rock as the state’s largest reservoir.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Lake Red Rock