Old Croton Dam
E74906
Old Croton Dam was the original 19th-century masonry dam that formed part of New York City’s first major public water supply system before being superseded by the New Croton Dam.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Old Croton Dam canonical | 3 |
| Old Croton Dam spillway | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T588523 — 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: Old Croton Dam Context triple: [New Croton Dam, replaced, Old Croton Dam]
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A.
New Croton Dam
New Croton Dam is a large masonry gravity dam in New York that forms the New Croton Reservoir, a key component of New York City’s water supply system.
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B.
Titicus Reservoir
Titicus Reservoir is a man-made lake in Westchester County, New York, that serves as one of the key water supply reservoirs for New York City.
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C.
New Croton Reservoir
The New Croton Reservoir is a major water supply reservoir in Westchester County, New York, that forms a key part of New York City's Croton water system.
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D.
Croton Falls Dam
Croton Falls Dam is a masonry gravity dam in Westchester County, New York, that forms the Croton Falls Reservoir as part of New York City’s water supply system.
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E.
Rondout Reservoir
Rondout Reservoir is a major New York City water supply reservoir in the Catskill Mountains, formed by damming Rondout Creek and serving as a key component of the city’s Catskill–Delaware water 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: Old Croton Dam Target entity description: Old Croton Dam was the original 19th-century masonry dam that formed part of New York City’s first major public water supply system before being superseded by the New Croton Dam.
-
A.
New Croton Dam
New Croton Dam is a large masonry gravity dam in New York that forms the New Croton Reservoir, a key component of New York City’s water supply system.
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B.
Titicus Reservoir
Titicus Reservoir is a man-made lake in Westchester County, New York, that serves as one of the key water supply reservoirs for New York City.
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C.
New Croton Reservoir
The New Croton Reservoir is a major water supply reservoir in Westchester County, New York, that forms a key part of New York City's Croton water system.
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D.
Croton Falls Dam
Croton Falls Dam is a masonry gravity dam in Westchester County, New York, that forms the Croton Falls Reservoir as part of New York City’s water supply system.
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E.
Rondout Reservoir
Rondout Reservoir is a major New York City water supply reservoir in the Catskill Mountains, formed by damming Rondout Creek and serving as a key component of the city’s Catskill–Delaware water system.
- 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: Old Croton Dam Description of subject: Old Croton Dam was the original 19th-century masonry dam that formed part of New York City’s first major public water supply system before being superseded by the New Croton Dam.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Old Croton Dam spillway