Cornalvo Dam
E793947
Cornalvo Dam is an ancient Roman gravity dam in Spain, renowned for its well-preserved engineering and role in supplying water to the city of Mérida.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Cornalvo Dam canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9304751 — 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: Cornalvo Dam Context triple: [Cornalvo Natural Park, contains, Cornalvo Dam]
-
A.
San Roque Dam
San Roque Dam is one of the largest dams in the Philippines, serving as a major source of hydroelectric power, irrigation, and flood control in the Luzon region.
-
B.
San Carlos Dam
San Carlos Dam is a major concrete gravity dam in Arizona that creates San Carlos Lake and provides irrigation water, flood control, and hydroelectric power along the Gila River.
-
C.
Don Pedro Dam
Don Pedro Dam is a major embankment dam on the Tuolumne River in California, forming Don Pedro Reservoir and serving as a key source of water storage, hydroelectric power, and recreation in the region.
-
D.
Valdecañas Dam
Valdecañas Dam is a large hydroelectric and water-regulation dam on the Tagus River in Spain, known for forming the Valdecañas Reservoir used for power generation, irrigation, and recreation.
-
E.
Arcos Dam
Arcos Dam is a reservoir dam located on the Guadalete River in the province of Cádiz, Spain, used primarily for water supply, irrigation, and flood control.
- 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: Cornalvo Dam Target entity description: Cornalvo Dam is an ancient Roman gravity dam in Spain, renowned for its well-preserved engineering and role in supplying water to the city of Mérida.
-
A.
San Roque Dam
San Roque Dam is one of the largest dams in the Philippines, serving as a major source of hydroelectric power, irrigation, and flood control in the Luzon region.
-
B.
San Carlos Dam
San Carlos Dam is a major concrete gravity dam in Arizona that creates San Carlos Lake and provides irrigation water, flood control, and hydroelectric power along the Gila River.
-
C.
Don Pedro Dam
Don Pedro Dam is a major embankment dam on the Tuolumne River in California, forming Don Pedro Reservoir and serving as a key source of water storage, hydroelectric power, and recreation in the region.
-
D.
Valdecañas Dam
Valdecañas Dam is a large hydroelectric and water-regulation dam on the Tagus River in Spain, known for forming the Valdecañas Reservoir used for power generation, irrigation, and recreation.
-
E.
Arcos Dam
Arcos Dam is a reservoir dam located on the Guadalete River in the province of Cádiz, Spain, used primarily for water supply, irrigation, and flood control.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Roman dam
ⓘ
ancient structure ⓘ gravity dam ⓘ |
| builder | Romans NERFINISHED ⓘ |
| condition | well preserved ⓘ |
| constructionCentury | 1st–2nd century AD ⓘ |
| constructionPeriod | Roman Empire NERFINISHED ⓘ |
| continent | Europe ⓘ |
| country | Spain ⓘ |
| crosses | Albarregas River NERFINISHED ⓘ |
| damType | curved gravity dam ⓘ |
| engineeringSignificance | example of early large-scale gravity dam ⓘ |
| feeds | aqueducts of Mérida ⓘ |
| function | urban water supply ⓘ |
| hasOutletWorks | yes ⓘ |
| hasReservoir | Cornalvo Reservoir NERFINISHED ⓘ |
| hasSpillway | yes ⓘ |
| hasUse |
environmental conservation
ⓘ
recreation ⓘ |
| heightApprox | 28 m ⓘ |
| heritageDesignation |
Bien de Interés Cultural
ⓘ
UNESCO World Heritage Site component NERFINISHED ⓘ |
| heritageDesignationCountry | Spain ⓘ |
| includedIn | Roman dams in Spain ⓘ |
| lengthApprox | 220 m ⓘ |
| locatedIn |
Extremadura
NERFINISHED
ⓘ
province of Badajoz ⓘ |
| locatedInProtectedArea | Cornalvo Natural Park NERFINISHED ⓘ |
| locatedNear | Mérida NERFINISHED ⓘ |
| managedBy | regional authorities of Extremadura NERFINISHED ⓘ |
| materialUsed |
ashlar blocks
ⓘ
concrete ⓘ rubble masonry ⓘ |
| nearbyCity | Mérida NERFINISHED ⓘ |
| notableFor |
Roman hydraulic engineering
ⓘ
state of preservation ⓘ |
| partOf | Archaeological Ensemble of Mérida NERFINISHED ⓘ |
| purpose | water supply ⓘ |
| region | western Spain ⓘ |
| reservoirCapacityApprox | 6 hm³ ⓘ |
| reservoirNameEtymology | derived from Latin Cornus Albus NERFINISHED ⓘ |
| status | in use ⓘ |
| suppliedWaterTo |
Emerita Augusta
NERFINISHED
ⓘ
Mérida NERFINISHED ⓘ |
| tourism |
cultural tourism site
ⓘ
nature tourism site ⓘ |
| waterBodyCreated | Cornalvo Reservoir 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: Cornalvo Dam Description of subject: Cornalvo Dam is an ancient Roman gravity dam in Spain, renowned for its well-preserved engineering and role in supplying water to the city of Mérida.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.