New York City Board of Water Supply

E675311

defunct organization government organization municipal agency

The New York City Board of Water Supply was a municipal agency responsible for planning and constructing the large-scale waterworks that expanded and secured New York City’s drinking water system in the early 20th century.

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All labels observed (3)

Label	Occurrences
New York City Board of Water Supply canonical	2
City of New York Board of Water Supply	1
New York City Department of Water Supply (historical)	1

How this entity was disambiguated

This entity first appeared as the object of triple T7590802 — 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 Board of Water Supply
Context triple: [Nora Stanton Blatch, employer, New York City Board of Water Supply]

A. New York City Department of Environmental Protection
The New York City Department of Environmental Protection is the municipal agency responsible for managing the city’s water supply, wastewater treatment, and environmental regulation to protect public health and natural resources.
B. New York City water supply system
The New York City water supply system is a vast network of reservoirs, aqueducts, tunnels, and distribution infrastructure that delivers potable water from upstate watersheds to millions of residents in New York City.
C. Delaware River and Bay Authority
The Delaware River and Bay Authority is a bi-state governmental agency that manages and operates transportation infrastructure and services, including bridges, ferries, and airports, between Delaware and New Jersey.
D. Albany Department of Water and Water Supply
The Albany Department of Water and Water Supply is the municipal agency responsible for managing the drinking water, distribution system, and related infrastructure for the City of Albany, New York.
E. New York State Canal Corporation
The New York State Canal Corporation is the public agency responsible for operating, maintaining, and promoting New York’s historic canal system, including the Erie, Champlain, Oswego, and Cayuga-Seneca Canals.
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 Board of Water Supply
Target entity description: The New York City Board of Water Supply was a municipal agency responsible for planning and constructing the large-scale waterworks that expanded and secured New York City’s drinking water system in the early 20th century.

A. New York City Department of Environmental Protection
The New York City Department of Environmental Protection is the municipal agency responsible for managing the city’s water supply, wastewater treatment, and environmental regulation to protect public health and natural resources.
B. New York City water supply system
The New York City water supply system is a vast network of reservoirs, aqueducts, tunnels, and distribution infrastructure that delivers potable water from upstate watersheds to millions of residents in New York City.
C. Delaware River and Bay Authority
The Delaware River and Bay Authority is a bi-state governmental agency that manages and operates transportation infrastructure and services, including bridges, ferries, and airports, between Delaware and New Jersey.
D. Albany Department of Water and Water Supply
The Albany Department of Water and Water Supply is the municipal agency responsible for managing the drinking water, distribution system, and related infrastructure for the City of Albany, New York.
E. New York State Canal Corporation
The New York State Canal Corporation is the public agency responsible for operating, maintaining, and promoting New York’s historic canal system, including the Erie, Champlain, Oswego, and Cayuga-Seneca Canals.
F. None of above. chosen

Statements (39)

Predicate	Object
instanceOf	defunct organization ⓘ government organization ⓘ municipal agency ⓘ
appliesToJurisdiction	New York City ⓘ
appliesToPart	New York City drinking water system ⓘ
country	United States of America ⓘ
dissolvedOrAbolished	20th century ⓘ
fieldOfWork	municipal water management ⓘ water infrastructure construction ⓘ waterworks planning ⓘ
hasDomain	public utilities ⓘ public works ⓘ
hasDuty	constructing New York City waterworks ⓘ expanding New York City drinking water system ⓘ planning New York City waterworks ⓘ securing New York City drinking water supply ⓘ
hasEffect	development of regional water infrastructure for New York City ⓘ improved reliability of New York City drinking water supply ⓘ increased capacity of New York City drinking water system ⓘ
hasObjective	develop large-scale water infrastructure projects ⓘ ensure long-term water security for New York City ⓘ provide adequate drinking water for New York City ⓘ
inception	early 20th century ⓘ
industry	water supply ⓘ
locatedInTheAdministrativeTerritorialEntity	New York City ⓘ New York State ⓘ
operatedInTheAdministrativeTerritorialEntity	New York City ⓘ New York State ⓘ
ownedBy	City of New York ⓘ linked to: New York City
partOf	Government of New York City ⓘ linked to: New York City government
replacedBy	New York City Department of Environmental Protection ⓘ
significantEvent	construction of large-scale waterworks for New York City ⓘ expansion of New York City water supply system ⓘ planning large-scale waterworks for New York City ⓘ securing long-distance water sources for New York City ⓘ
timePeriod	early 20th century ⓘ
use	aqueduct systems ⓘ reservoir systems ⓘ surface water sources ⓘ

How these facts were elicited

Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

Nora Stanton Blatch → employer → New York City Board of Water Supply ⓘ

subject linked to: employing pioneering civil engineer Nora Stanton Blatch

Ray Ewry → employer → New York City Board of Water Supply ⓘ

Williamsbridge Reservoir → operator → New York City Department of Water Supply (historical) ⓘ

linked to: New York City Board of Water Supply

Downsville Dam → builtBy → City of New York Board of Water Supply ⓘ