El Capitan Dam
E688753
El Capitan Dam is a large concrete arch dam in San Diego County, California, built for water storage, flood control, and recreation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| El Capitan Dam canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T7383685 — 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: El Capitan Dam Context triple: [San Diego River, hasDam, El Capitan 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.
Leaburg Dam
Leaburg Dam is a historic hydroelectric dam on Oregon’s McKenzie River that generates power and helps regulate river flow.
-
C.
O'Shaughnessy Dam
O'Shaughnessy Dam is a concrete arch-gravity dam in Yosemite National Park that creates the Hetch Hetchy Reservoir, supplying water and hydroelectric power to the San Francisco Bay Area.
-
D.
Red Rock Dam
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.
-
E.
Palisade Dam
Palisade Dam is an irrigation and water storage structure located on the Sevier River in central Utah, supporting local agriculture and recreation.
- 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: El Capitan Dam Target entity description: El Capitan Dam is a large concrete arch dam in San Diego County, California, built for water storage, flood control, and recreation.
-
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.
Leaburg Dam
Leaburg Dam is a historic hydroelectric dam on Oregon’s McKenzie River that generates power and helps regulate river flow.
-
C.
O'Shaughnessy Dam
O'Shaughnessy Dam is a concrete arch-gravity dam in Yosemite National Park that creates the Hetch Hetchy Reservoir, supplying water and hydroelectric power to the San Francisco Bay Area.
-
D.
Red Rock Dam
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.
-
E.
Palisade Dam
Palisade Dam is an irrigation and water storage structure located on the Sevier River in central Utah, supporting local agriculture and recreation.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
concrete arch dam
ⓘ
dam ⓘ |
| architecturalStyle | arch dam ⓘ |
| basinCountry |
United States
ⓘ
linked to:
United States of America
|
| category |
Arch dams
ⓘ
Buildings and structures in San Diego County, California ⓘ Dams in California ⓘ |
| completedIn | 1934 ⓘ |
| constructionBegan | 1930 ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| hasFunction |
flood mitigation
ⓘ
recreational facility support ⓘ water conservation ⓘ |
| hasReservoir | El Capitan Reservoir ⓘ |
| impounds | El Capitan Reservoir ⓘ |
| isInfrastructureType |
civil engineering structure
ⓘ
water infrastructure ⓘ |
| locatedIn |
California
ⓘ
linked to:
California, United States
San Diego County, California ⓘ
linked to:
San Diego County
|
| locatedInMountainRange | Cuyamaca Mountains ⓘ |
| locatedInTimeZone | Pacific Time Zone ⓘ |
| locatedNear |
Lakeside, California
ⓘ
San Diego, California ⓘ
linked to:
San Diego, California, United States
|
| locatedOnRiver | San Diego River ⓘ |
| manages | flood flows on the San Diego River ⓘ |
| materialUsed | concrete ⓘ |
| namedAfter |
El Capitan (local peak)
ⓘ
linked to:
Cuyamaca Peak
|
| opened | 1934 ⓘ |
| operator | City of San Diego Public Utilities Department ⓘ |
| owner |
City of San Diego
ⓘ
linked to:
San Diego, California, United States
|
| partOf |
San Diego water system
ⓘ
linked to:
San Diego County Water System
|
| purpose |
flood control
ⓘ
recreation ⓘ water storage ⓘ |
| regionServed |
San Diego
ⓘ
San Diego County ⓘ |
| usedFor |
boating
ⓘ
fishing ⓘ municipal water supply ⓘ outdoor recreation ⓘ water sports ⓘ |
| watercourse | San Diego 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: El Capitan Dam Description of subject: El Capitan Dam is a large concrete arch dam in San Diego County, California, built for water storage, flood control, and recreation.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.