Catskill–Delaware water supply system
E723948
The Catskill–Delaware water supply system is a major network of reservoirs, aqueducts, and related infrastructure that delivers the majority of New York City’s high-quality drinking water from the Catskill Mountains and Delaware River watershed.
All labels observed (12)
How this entity was disambiguated
This entity first appeared as the object of triple T8217390 — 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: Catskill–Delaware water supply system Context triple: [Kensico Dam, partOf, Catskill–Delaware water supply system]
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A.
Delaware Aqueduct
The Delaware Aqueduct is a historic 19th-century suspension aqueduct that carried the Delaware and Hudson Canal over the Delaware River and is now preserved as the oldest surviving wire suspension bridge in the United States.
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B.
Delaware Aqueduct
The Delaware Aqueduct is a major underground tunnel that transports drinking water from reservoirs in the Delaware River watershed to New York City, forming a critical component of the city’s water supply infrastructure.
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C.
Schoharie–Esopus water diversion system
The Schoharie–Esopus water diversion system is a key component of New York City's upstate water supply infrastructure that transfers water from the Schoharie Reservoir into the Esopus Creek watershed via tunnels and related facilities.
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D.
Catskill Aqueduct
The Catskill Aqueduct is a major component of New York City's water supply system, transporting drinking water from the Catskill Mountains to the city and its reservoirs.
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E.
Catskill system reservoirs
The Catskill system reservoirs are a network of large upstate New York water storage basins that form a major component of New York City’s drinking water supply 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: Catskill–Delaware water supply system Target entity description: The Catskill–Delaware water supply system is a major network of reservoirs, aqueducts, and related infrastructure that delivers the majority of New York City’s high-quality drinking water from the Catskill Mountains and Delaware River watershed.
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A.
Delaware Aqueduct
The Delaware Aqueduct is a historic 19th-century suspension aqueduct that carried the Delaware and Hudson Canal over the Delaware River and is now preserved as the oldest surviving wire suspension bridge in the United States.
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B.
Delaware Aqueduct
The Delaware Aqueduct is a major underground tunnel that transports drinking water from reservoirs in the Delaware River watershed to New York City, forming a critical component of the city’s water supply infrastructure.
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C.
Schoharie–Esopus water diversion system
The Schoharie–Esopus water diversion system is a key component of New York City's upstate water supply infrastructure that transfers water from the Schoharie Reservoir into the Esopus Creek watershed via tunnels and related facilities.
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D.
Catskill Aqueduct
The Catskill Aqueduct is a major component of New York City's water supply system, transporting drinking water from the Catskill Mountains to the city and its reservoirs.
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E.
Catskill system reservoirs
The Catskill system reservoirs are a network of large upstate New York water storage basins that form a major component of New York City’s drinking water supply system.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf | municipal water supply system ⓘ |
| beneficiary |
New York City residents
ⓘ
some communities in upstate New York ⓘ |
| connectedTo |
Croton water supply system
NERFINISHED
ⓘ
New York City distribution tunnels ⓘ |
| constructionStart | early 20th century ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| designPrinciple | gravity flow with minimal pumping ⓘ |
| environmentalImpact | requires extensive watershed land protection ⓘ |
| hasPart |
Ashokan Reservoir
NERFINISHED
ⓘ
Cannonsville Reservoir NERFINISHED ⓘ Catskill Aqueduct NERFINISHED ⓘ Delaware Aqueduct NERFINISHED ⓘ Hillview Reservoir NERFINISHED ⓘ Kensico Reservoir NERFINISHED ⓘ Neversink Reservoir NERFINISHED ⓘ Pepacton Reservoir NERFINISHED ⓘ Rondout Reservoir NERFINISHED ⓘ Schoharie Reservoir NERFINISHED ⓘ Shandaken Tunnel NERFINISHED ⓘ West Branch Reservoir NERFINISHED ⓘ |
| infrastructureType |
aqueducts
ⓘ
reservoirs ⓘ tunnels ⓘ water treatment facilities ⓘ |
| locatedIn |
Catskill Park region
NERFINISHED
ⓘ
Delaware River basin NERFINISHED ⓘ State of New York NERFINISHED ⓘ |
| manages | protected watershed lands ⓘ |
| notableFeature |
long-distance gravity-fed conveyance
ⓘ
provides majority of New York City’s drinking water ⓘ |
| operator | New York City Department of Environmental Protection NERFINISHED ⓘ |
| partOf | New York City water supply system ⓘ |
| primaryWaterUse | municipal drinking water supply ⓘ |
| purpose | delivery of high-quality drinking water to New York City ⓘ |
| regulator |
New York State Department of Health
NERFINISHED
ⓘ
United States Environmental Protection Agency NERFINISHED ⓘ |
| regulatoryStatus | Filtration Avoidance Determination under U.S. EPA rules NERFINISHED ⓘ |
| serves | New York City NERFINISHED ⓘ |
| supplies | drinking water ⓘ |
| waterQuality | unfiltered surface water ⓘ |
| watershedProtectionProgram | New York City watershed protection program ⓘ |
| waterSourceRegion |
Catskill Mountains
NERFINISHED
ⓘ
Delaware River watershed NERFINISHED ⓘ |
| waterType | surface water ⓘ |
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: Catskill–Delaware water supply system Description of subject: The Catskill–Delaware water supply system is a major network of reservoirs, aqueducts, and related infrastructure that delivers the majority of New York City’s high-quality drinking water from the Catskill Mountains and Delaware River watershed.
Referenced by (15)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Catskill water supply system
this entity surface form:
Catskill and Delaware aqueduct system (general source region)
this entity surface form:
New York City Delaware water system
this entity surface form:
New York City Catskill water supply system
this entity surface form:
New York City Delaware System reservoirs
this entity surface form:
Catskill-Delaware water supply system
this entity surface form:
Catskill water supply system
this entity surface form:
Catskill-Delaware water system
this entity surface form:
New York City Catskill water system
this entity surface form:
Catskill water supply system
this entity surface form:
New York City water supply Catskill–Delaware system
this entity surface form:
Catskill water supply system
this entity surface form:
New York City Department of Environmental Protection Catskill-Delaware system operations
this entity surface form:
New York City Catskill–Delaware water supply system