Harlan County Dam
E488071
Harlan County Dam is a large earthen dam on the Republican River in south-central Nebraska, forming Harlan County Lake for flood control, irrigation, and recreation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Harlan County Dam canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4622696 — 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: Harlan County Dam Context triple: [Republican River, hasDam, Harlan County Dam]
-
A.
Kentucky Dam
Kentucky Dam is a major hydroelectric and flood-control dam in western Kentucky that forms Kentucky Lake on the Tennessee River.
-
B.
High Rock Dam
High Rock Dam is a hydroelectric dam in North Carolina that impounds the Yadkin River to form High Rock Lake, a major reservoir for power generation and recreation.
-
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.
Trinity Dam
Trinity Dam is a major earthfill dam on the Trinity River in Northern California, forming Trinity Lake and providing water storage, hydroelectric power, and flood control as part of the state’s large federal water management system.
-
E.
Forge Dam
Forge Dam is a popular recreational park and former industrial mill site along Porter Brook in Sheffield, England, known for its woodland walks, playground, and café.
- 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: Harlan County Dam Target entity description: Harlan County Dam is a large earthen dam on the Republican River in south-central Nebraska, forming Harlan County Lake for flood control, irrigation, and recreation.
-
A.
Kentucky Dam
Kentucky Dam is a major hydroelectric and flood-control dam in western Kentucky that forms Kentucky Lake on the Tennessee River.
-
B.
High Rock Dam
High Rock Dam is a hydroelectric dam in North Carolina that impounds the Yadkin River to form High Rock Lake, a major reservoir for power generation and recreation.
-
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.
Trinity Dam
Trinity Dam is a major earthfill dam on the Trinity River in Northern California, forming Trinity Lake and providing water storage, hydroelectric power, and flood control as part of the state’s large federal water management system.
-
E.
Forge Dam
Forge Dam is a popular recreational park and former industrial mill site along Porter Brook in Sheffield, England, known for its woodland walks, playground, and café.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
earthfill dam
ⓘ
embankment dam ⓘ flood control structure ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| completedIn | 1952 ⓘ |
| constructionBegan | 1946 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| crosses | Republican River NERFINISHED ⓘ |
| formsReservoir | Harlan County Lake NERFINISHED ⓘ |
| hasName | Harlan County Dam NERFINISHED ⓘ |
| hasSpillway | yes ⓘ |
| height | approximately 89 feet ⓘ |
| length | approximately 11,000 feet ⓘ |
| locatedIn |
Harlan County, Nebraska
NERFINISHED
ⓘ
Nebraska ⓘ |
| locatedInWatershed |
Missouri River watershed
ⓘ
Republican River watershed NERFINISHED ⓘ |
| locatedOnRiver | Republican River NERFINISHED ⓘ |
| managedBy | U.S. Army Corps of Engineers Omaha District NERFINISHED ⓘ |
| material |
earth
ⓘ
rock fill ⓘ |
| nearCity | Alma, Nebraska NERFINISHED ⓘ |
| opened | 1952 ⓘ |
| operator | United States Army Corps of Engineers NERFINISHED ⓘ |
| owner | United States government NERFINISHED ⓘ |
| partOf | Republican River Basin projects NERFINISHED ⓘ |
| purpose |
flood control
ⓘ
irrigation ⓘ recreation ⓘ |
| region | south-central Nebraska ⓘ |
| reservoirCapacity | Harlan County Lake NERFINISHED ⓘ |
| reservoirUse |
flood control storage
ⓘ
irrigation water supply ⓘ recreational activities ⓘ |
| usedFor |
boating
ⓘ
camping ⓘ downstream flood protection ⓘ fishing ⓘ support of agricultural irrigation ⓘ |
| watercourse | Republican River NERFINISHED ⓘ |
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: Harlan County Dam Description of subject: Harlan County Dam is a large earthen dam on the Republican River in south-central Nebraska, forming Harlan County Lake for flood control, irrigation, and recreation.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.