New York City Water Tunnel No. 2
E238807
New York City Water Tunnel No. 2 is a major underground aqueduct that transports drinking water from upstate reservoirs to the city as part of its extensive water distribution network.
All labels observed (2)
| Label | Occurrences |
|---|---|
| New York City Water Tunnel No. 2 canonical | 4 |
| NYC Water Tunnel No. 2 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2111074 — 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: New York City Water Tunnel No. 2 Context triple: [New York City water supply system, hasPart, New York City Water Tunnel No. 2]
-
A.
New York City Water Tunnel No. 1
New York City Water Tunnel No. 1 is a major underground aqueduct that transports drinking water from upstate reservoirs to New York City.
-
B.
Hudson River tunnels
The Hudson River tunnels are a pair of early 20th-century rail tunnels beneath the Hudson River that carry Amtrak and NJ Transit trains between New Jersey and New York City’s Penn Station.
-
C.
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.
-
D.
Roebling's Delaware Aqueduct
Roebling's Delaware Aqueduct is a historic 19th-century suspension aqueduct and former canal bridge designed by John A. Roebling that now serves as a road bridge over the Delaware River between Pennsylvania and New York.
-
E.
Hugh L. Carey Tunnel
The Hugh L. Carey Tunnel is a major vehicular tunnel in New York City that connects Lower Manhattan to Brooklyn beneath New York Harbor.
- 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: New York City Water Tunnel No. 2 Target entity description: New York City Water Tunnel No. 2 is a major underground aqueduct that transports drinking water from upstate reservoirs to the city as part of its extensive water distribution network.
-
A.
New York City Water Tunnel No. 1
New York City Water Tunnel No. 1 is a major underground aqueduct that transports drinking water from upstate reservoirs to New York City.
-
B.
Hudson River tunnels
The Hudson River tunnels are a pair of early 20th-century rail tunnels beneath the Hudson River that carry Amtrak and NJ Transit trains between New Jersey and New York City’s Penn Station.
-
C.
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.
-
D.
Roebling's Delaware Aqueduct
Roebling's Delaware Aqueduct is a historic 19th-century suspension aqueduct and former canal bridge designed by John A. Roebling that now serves as a road bridge over the Delaware River between Pennsylvania and New York.
-
E.
Hugh L. Carey Tunnel
The Hugh L. Carey Tunnel is a major vehicular tunnel in New York City that connects Lower Manhattan to Brooklyn beneath New York Harbor.
- F. None of above. chosen
Statements (39)
| Predicate | Object |
|---|---|
| instanceOf |
aqueduct
ⓘ
drinking water conveyance system ⓘ underground infrastructure ⓘ water tunnel ⓘ |
| alsoKnownAs |
New York City Water Tunnel No. 2
ⓘ
surface form:
NYC Water Tunnel No. 2
Water Tunnel 2 ⓘ |
| connectsTo |
Hillview Reservoir
ⓘ
New York City distribution shafts ⓘ |
| constructionMethod | deep rock tunneling ⓘ |
| constructionStart | 1936 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| depthBelowSurface | approximately 400 to 800 feet ⓘ |
| designedFor | redundancy in New York City water supply ⓘ |
| engineeringDiscipline | civil engineering ⓘ |
| followedBy | New York City Water Tunnel No. 3 ⓘ |
| function | convey raw and treated water to city distribution mains ⓘ |
| hazardType | critical infrastructure ⓘ |
| locatedIn |
New York City
ⓘ
New York ⓘ
surface form:
New York State
|
| maintainedBy | New York City Department of Environmental Protection ⓘ |
| material | rock tunnel with concrete lining ⓘ |
| opened | 1950 ⓘ |
| operator | New York City Department of Environmental Protection ⓘ |
| owner |
New York City
ⓘ
surface form:
City of New York
|
| partOf |
New York City water supply system
ⓘ
surface form:
New York City water distribution network
New York City water supply system ⓘ |
| precededBy | New York City Water Tunnel No. 1 ⓘ |
| purpose | municipal water supply ⓘ |
| regionServed |
New York metropolitan area
ⓘ
surface form:
New York City metropolitan area
|
| riskIfFailed | major disruption of New York City water supply ⓘ |
| route | from Hillview Reservoir toward Brooklyn and Queens ⓘ |
| serves | New York City ⓘ |
| sourceRegion | upstate New York reservoirs ⓘ |
| status | in service ⓘ |
| suppliesBorough |
Brooklyn
ⓘ
Manhattan ⓘ Queens ⓘ |
| transports | drinking water ⓘ |
| typeOfWater | potable 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: New York City Water Tunnel No. 2 Description of subject: New York City Water Tunnel No. 2 is a major underground aqueduct that transports drinking water from upstate reservoirs to the city as part of its extensive water distribution network.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
NYC Water Tunnel No. 2