Vanderkloof Dam
E281104
Vanderkloof Dam is a major hydroelectric and irrigation dam in South Africa, located on the Orange River and forming one of the country’s largest reservoirs.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Vanderkloof Dam canonical | 9 |
| Vanderkloof Dam Reservoir | 2 |
| Vanderkloof Dam Lake | 1 |
| Vanderkloof Dam on the Orange River | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2582750 — 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: Vanderkloof Dam Context triple: [Orange River, hasDam, Vanderkloof Dam]
-
A.
Gariep Dam
Gariep Dam is South Africa’s largest storage reservoir, situated on the Orange River and serving as a key source of water, hydroelectric power, and recreation for the surrounding regions.
-
B.
Betania Dam
Betania Dam is a major hydroelectric dam and reservoir in Colombia, known for generating power and supporting irrigation and aquaculture in the Huila region.
-
C.
Eder Dam
Eder Dam is a major German gravity dam in the Eder River valley, historically known for being one of the dams breached by the RAF’s “Dambusters” raid during World War II.
-
D.
Brownlee Dam
Brownlee Dam is a major hydroelectric dam on the Snake River in the western United States, forming Brownlee Reservoir and playing a key role in regional power generation and water management.
-
E.
Wagendrift Dam
Wagendrift Dam is a reservoir and recreational area on the Bushmans River in KwaZulu-Natal, South Africa, known for fishing, boating, and its surrounding nature reserve.
- 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: Vanderkloof Dam Target entity description: Vanderkloof Dam is a major hydroelectric and irrigation dam in South Africa, located on the Orange River and forming one of the country’s largest reservoirs.
-
A.
Gariep Dam
Gariep Dam is South Africa’s largest storage reservoir, situated on the Orange River and serving as a key source of water, hydroelectric power, and recreation for the surrounding regions.
-
B.
Betania Dam
Betania Dam is a major hydroelectric dam and reservoir in Colombia, known for generating power and supporting irrigation and aquaculture in the Huila region.
-
C.
Eder Dam
Eder Dam is a major German gravity dam in the Eder River valley, historically known for being one of the dams breached by the RAF’s “Dambusters” raid during World War II.
-
D.
Brownlee Dam
Brownlee Dam is a major hydroelectric dam on the Snake River in the western United States, forming Brownlee Reservoir and playing a key role in regional power generation and water management.
-
E.
Wagendrift Dam
Wagendrift Dam is a reservoir and recreational area on the Bushmans River in KwaZulu-Natal, South Africa, known for fishing, boating, and its surrounding nature reserve.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
arch-gravity dam
ⓘ
dam ⓘ hydroelectric dam ⓘ |
| annualGeneration | ~900 GWh (approximate) ⓘ |
| catchmentArea | 240000 km² (approximate) ⓘ |
| commissioningDate | 1977 ⓘ |
| constructionStartDate | 1967 ⓘ |
| country | South Africa ⓘ |
| crestElevation | 100 m (approximate above river bed) ⓘ |
| downstreamOf | Gariep Dam ⓘ |
| hasAlternativeName |
Vanderkloof Dam on the Orange River
ⓘ
linked to:
Vanderkloof Dam
|
| hasFeature |
concrete arch-gravity structure
ⓘ
hydropower station at dam toe ⓘ |
| height | 108 m ⓘ |
| installedCapacity | 240 MW (approximate) ⓘ |
| length | 765 m ⓘ |
| locatedInBasin |
Orange River Basin
ⓘ
linked to:
Orange River
|
| locatedInProvince | Northern Cape ⓘ |
| locatedOnRiver | Orange River ⓘ |
| managesWaterFor |
irrigation schemes in Northern Cape
ⓘ
irrigation schemes in Western Cape ⓘ |
| nearestTown | Vanderkloof ⓘ |
| numberOfTurbines | 2 ⓘ |
| openingDate | 1977 ⓘ |
| operator | Department of Water and Sanitation (South Africa) ⓘ |
| ownedBy | Government of South Africa ⓘ |
| partOf | Orange River Project ⓘ |
| plantType | conventional hydroelectric power station ⓘ |
| previousName | P K Le Roux Dam ⓘ |
| purpose |
domestic water supply
ⓘ
flow regulation ⓘ hydroelectric power generation ⓘ industrial water supply ⓘ irrigation ⓘ |
| rankInSouthAfricaByReservoirCapacity | second largest (after Gariep Dam) ⓘ |
| reservoirCapacity | 3.2 billion m³ (approximate) ⓘ |
| reservoirName |
Vanderkloof Dam Reservoir
ⓘ
linked to:
Vanderkloof Dam
|
| reservoirSurfaceArea | 133 km² (approximate) ⓘ |
| spillwayCapacity | 12500 m³/s (approximate) ⓘ |
| spillwayGates | radial gates ⓘ |
| spillwayType | controlled spillway ⓘ |
| turbineType | Francis turbine ⓘ |
| uses |
boating
ⓘ
fishing ⓘ recreation ⓘ |
| watercourseDownstream | Orange River ⓘ |
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: Vanderkloof Dam Description of subject: Vanderkloof Dam is a major hydroelectric and irrigation dam in South Africa, located on the Orange River and forming one of the country’s largest reservoirs.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Vanderkloof Dam
linked to: Vanderkloof Dam
linked to: Vanderkloof Dam
linked to: Vanderkloof Dam