Crystal Springs Dam
E376996
Crystal Springs Dam is a historic concrete gravity dam in San Mateo County, California, that impounds water to create the Crystal Springs Reservoir as part of the San Francisco Peninsula’s water supply system.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Crystal Springs Dam canonical | 1 |
| Lower Crystal Springs Dam | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3405570 — 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: Crystal Springs Dam Context triple: [Crystal Springs Reservoir, formedBy, Crystal Springs Dam]
-
A.
Forestville Dam
Forestville Dam is a hydroelectric and recreational dam located on the Dead River near Marquette in Michigan’s Upper Peninsula.
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B.
Parker Dam
Parker Dam is a concrete arch-gravity dam on the Colorado River best known for creating Lake Havasu and supplying water and hydroelectric power to parts of California and Arizona.
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C.
Gillespie Dam
Gillespie Dam is an early 20th-century concrete gravity dam on Arizona’s Gila River, historically used for irrigation and now noted as a local landmark and wildlife habitat area.
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D.
Stewart Mountain Dam
Stewart Mountain Dam is a concrete thin-arch dam on Arizona’s Salt River that forms Saguaro Lake and provides water storage, hydroelectric power, and recreation.
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E.
Riley Dam
Riley Dam is a hydroelectric dam located on the Androscoggin River in Maine, used for power generation and river flow management.
- 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: Crystal Springs Dam Target entity description: Crystal Springs Dam is a historic concrete gravity dam in San Mateo County, California, that impounds water to create the Crystal Springs Reservoir as part of the San Francisco Peninsula’s water supply system.
-
A.
Forestville Dam
Forestville Dam is a hydroelectric and recreational dam located on the Dead River near Marquette in Michigan’s Upper Peninsula.
-
B.
Parker Dam
Parker Dam is a concrete arch-gravity dam on the Colorado River best known for creating Lake Havasu and supplying water and hydroelectric power to parts of California and Arizona.
-
C.
Gillespie Dam
Gillespie Dam is an early 20th-century concrete gravity dam on Arizona’s Gila River, historically used for irrigation and now noted as a local landmark and wildlife habitat area.
-
D.
Stewart Mountain Dam
Stewart Mountain Dam is a concrete thin-arch dam on Arizona’s Salt River that forms Saguaro Lake and provides water storage, hydroelectric power, and recreation.
-
E.
Riley Dam
Riley Dam is a hydroelectric dam located on the Androscoggin River in Maine, used for power generation and river flow management.
- F. None of above. chosen
Statements (46)
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: Crystal Springs Dam Description of subject: Crystal Springs Dam is a historic concrete gravity dam in San Mateo County, California, that impounds water to create the Crystal Springs Reservoir as part of the San Francisco Peninsula’s water supply system.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Lower Crystal Springs Dam