San Andreas Dam
E141599
San Andreas Dam is an earth-fill embankment dam in San Mateo County, California, that impounds San Andreas Lake as part of the Hetch Hetchy Regional Water System serving the San Francisco Bay Area.
All labels observed (2)
| Label | Occurrences |
|---|---|
| San Andreas Dam canonical | 2 |
| San Andreas Lake dam | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1109417 — 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: San Andreas Dam Context triple: [San Andreas Lake, hasDam, San Andreas Dam]
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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.
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B.
Castaic Dam
Castaic Dam is a large embankment dam in Los Angeles County, California, that forms Castaic Lake and plays a key role in water storage and hydroelectric power generation for Southern California.
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C.
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.
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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.
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E.
Perris Dam
Perris Dam is a large earthfill embankment dam in Riverside County, California, that forms Lake Perris as part of the state’s major water storage and distribution system.
- 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: San Andreas Dam Target entity description: San Andreas Dam is an earth-fill embankment dam in San Mateo County, California, that impounds San Andreas Lake as part of the Hetch Hetchy Regional Water System serving the San Francisco Bay Area.
-
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.
Castaic Dam
Castaic Dam is a large embankment dam in Los Angeles County, California, that forms Castaic Lake and plays a key role in water storage and hydroelectric power generation for Southern California.
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C.
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.
-
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.
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E.
Perris Dam
Perris Dam is a large earthfill embankment dam in Riverside County, California, that forms Lake Perris as part of the state’s major water storage and distribution system.
- F. None of above. chosen
Statements (48)
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: San Andreas Dam Description of subject: San Andreas Dam is an earth-fill embankment dam in San Mateo County, California, that impounds San Andreas Lake as part of the Hetch Hetchy Regional Water System serving the San Francisco Bay Area.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: San Andreas Dam