Theewaterskloof Dam
E1005366
Theewaterskloof Dam is one of the largest dams in the Western Cape of South Africa, serving as a major water supply source for Cape Town and surrounding agricultural areas.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Theewaterskloof Dam canonical | 2 |
| Theewaterskloof Dam Reservoir | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T12635924 — 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: Theewaterskloof Dam Context triple: [Franschhoek Pass, locatedNear, Theewaterskloof Dam]
-
A.
Hartbeespoort Dam
Hartbeespoort Dam is a large, popular recreational and irrigation reservoir in South Africa’s North West Province, known for its scenic setting and proximity to Pretoria and Johannesburg.
-
B.
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.
-
C.
Blyde Dam
Blyde Dam is a large concrete arch dam in South Africa’s Mpumalanga province, known for forming part of the scenic Blyde River Canyon and supporting hydroelectric power, irrigation, and tourism in the region.
-
D.
Vaal Dam
Vaal Dam is a major reservoir in South Africa that supplies water to the Gauteng region and plays a key role in the country’s water management and power generation systems.
-
E.
Witbank Dam
Witbank Dam is a large reservoir in South Africa’s Mpumalanga province, known for supporting local industry, water supply, and recreational activities such as fishing and boating.
- 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: Theewaterskloof Dam Target entity description: Theewaterskloof Dam is one of the largest dams in the Western Cape of South Africa, serving as a major water supply source for Cape Town and surrounding agricultural areas.
-
A.
Hartbeespoort Dam
Hartbeespoort Dam is a large, popular recreational and irrigation reservoir in South Africa’s North West Province, known for its scenic setting and proximity to Pretoria and Johannesburg.
-
B.
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.
-
C.
Blyde Dam
Blyde Dam is a large concrete arch dam in South Africa’s Mpumalanga province, known for forming part of the scenic Blyde River Canyon and supporting hydroelectric power, irrigation, and tourism in the region.
-
D.
Vaal Dam
Vaal Dam is a major reservoir in South Africa that supplies water to the Gauteng region and plays a key role in the country’s water management and power generation systems.
-
E.
Witbank Dam
Witbank Dam is a large reservoir in South Africa’s Mpumalanga province, known for supporting local industry, water supply, and recreational activities such as fishing and boating.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
dam
ⓘ
gravity dam ⓘ |
| affectedBy | 2015–2018 Western Cape drought ⓘ |
| basinCountry | South Africa ⓘ |
| catchmentArea | 500000000 m2 ⓘ |
| completionDate | 1980 ⓘ |
| constructionMaterial | concrete ⓘ |
| constructionStartDate | 1970 ⓘ |
| country | South Africa ⓘ |
| hasInfrastructure |
embankment
ⓘ
intake tower ⓘ spillway ⓘ |
| hasRecreationActivity |
camping
ⓘ
fishing ⓘ kiteboarding ⓘ sailing ⓘ windsurfing ⓘ |
| hasSpillwayType | ogee spillway ⓘ |
| height | 35 m ⓘ |
| isKeyComponentOf |
Cape Town bulk water supply network
ⓘ
linked to:
Western Cape water supply system
|
| length | 537 m ⓘ |
| locatedIn |
Riviersonderend Mountains region
ⓘ
linked to:
Riviersonderend Mountains
Theewaterskloof Local Municipality ⓘ Western Cape ⓘ |
| locatedNear | Villiersdorp ⓘ |
| majorWaterSourceFor |
Cape Town metropolitan area
ⓘ
linked to:
Greater Cape Town
City of Cape Town ⓘ
linked to:
Cape Town
surrounding agricultural areas ⓘ |
| namedAfter | Theewaterskloof valley ⓘ |
| nearCity |
Caledon
ⓘ
Grabouw ⓘ |
| notableEvent | reached critically low levels during Cape Town water crisis ⓘ |
| openingDate | 1980 ⓘ |
| operator | Department of Water and Sanitation (South Africa) ⓘ |
| partOf |
Berg–Olifants water management area
ⓘ
Western Cape Water Supply System ⓘ
linked to:
Western Cape water supply system
|
| province | Western Cape ⓘ |
| purpose |
irrigation
ⓘ
municipal water supply ⓘ |
| rankInRegionByCapacity | one of the largest dams in the Western Cape ⓘ |
| reservoirCapacity | 480000000 m3 ⓘ |
| reservoirName |
Theewaterskloof Dam Reservoir
ⓘ
linked to:
Theewaterskloof Dam
|
| reservoirSurfaceArea | 4800 ha ⓘ |
| river | Riviersonderend River NERFINISHED ⓘ |
| suppliesWaterTo |
Boland agricultural region
ⓘ
linked to:
Boland region
Cape Town reticulation system ⓘ |
| waterUse |
agricultural irrigation
ⓘ
domestic consumption ⓘ |
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: Theewaterskloof Dam Description of subject: Theewaterskloof Dam is one of the largest dams in the Western Cape of South Africa, serving as a major water supply source for Cape Town and surrounding agricultural areas.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Theewaterskloof Dam