Lewiston Pump-Generating Plant
E309212
The Lewiston Pump-Generating Plant is a hydroelectric pumped-storage facility near Niagara Falls that works in tandem with the Robert Moses Niagara Power Plant to balance electricity supply and demand.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Lewiston Pump-Generating Plant canonical | 2 |
| Lewiston Pump-Generating Plant reservoir | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2909677 — 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: Lewiston Pump-Generating Plant Context triple: [Robert Moses Niagara Power Plant, hasPart, Lewiston Pump-Generating Plant]
-
A.
Pickering Nuclear Generating Station
Pickering Nuclear Generating Station is a large Canadian nuclear power plant on the shore of Lake Ontario that has been a major source of electricity for the Greater Toronto Area.
-
B.
Alexander Generating Station
Alexander Generating Station is a hydroelectric power facility located on the Nipigon River in Ontario, Canada, that generates electricity from the river’s flow.
-
C.
Glenwood Power Station
Glenwood Power Station is an early 20th-century, now-abandoned industrial power plant on the Hudson River in Yonkers, New York, noted for its grand Beaux-Arts architecture and historic significance.
-
D.
Beauharnois generating station
The Beauharnois generating station is a large hydroelectric power plant in Quebec, Canada, known for harnessing the flow of the Saint Lawrence River to produce electricity.
-
E.
Cameron Falls Generating Station
Cameron Falls Generating Station is a hydroelectric power facility located on the Nipigon River in Ontario, Canada, that generates electricity from the river’s flow.
- 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: Lewiston Pump-Generating Plant Target entity description: The Lewiston Pump-Generating Plant is a hydroelectric pumped-storage facility near Niagara Falls that works in tandem with the Robert Moses Niagara Power Plant to balance electricity supply and demand.
-
A.
Pickering Nuclear Generating Station
Pickering Nuclear Generating Station is a large Canadian nuclear power plant on the shore of Lake Ontario that has been a major source of electricity for the Greater Toronto Area.
-
B.
Alexander Generating Station
Alexander Generating Station is a hydroelectric power facility located on the Nipigon River in Ontario, Canada, that generates electricity from the river’s flow.
-
C.
Glenwood Power Station
Glenwood Power Station is an early 20th-century, now-abandoned industrial power plant on the Hudson River in Yonkers, New York, noted for its grand Beaux-Arts architecture and historic significance.
-
D.
Beauharnois generating station
The Beauharnois generating station is a large hydroelectric power plant in Quebec, Canada, known for harnessing the flow of the Saint Lawrence River to produce electricity.
-
E.
Cameron Falls Generating Station
Cameron Falls Generating Station is a hydroelectric power facility located on the Nipigon River in Ontario, Canada, that generates electricity from the river’s flow.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
energy infrastructure
ⓘ
hydroelectric power plant ⓘ pumped-storage power station ⓘ |
| balancesWith | Robert Moses Niagara Power Plant ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| energySourceSubtype | hydropower ⓘ |
| energySourceType | renewable energy ⓘ |
| energyStorageType | gravitational potential energy ⓘ |
| gridConnection |
New York Independent System Operator
ⓘ
surface form:
New York State power grid
|
| gridRole |
load balancing facility
ⓘ
peaking power plant ⓘ |
| hasComponent |
Lewiston Reservoir
ⓘ
discharge structures ⓘ generating station ⓘ intake structures ⓘ pumping station ⓘ underground conduits ⓘ |
| hasFunction |
generates electricity during peak demand
ⓘ
pumps water to higher elevation during off-peak hours ⓘ |
| hasType | reversible pump-turbine plant ⓘ |
| isPartOfSystemWith |
Niagara River hydropower system
ⓘ
surface form:
Niagara River hydroelectric system
|
| locatedIn |
Lewiston, New York
ⓘ
Niagara County, New York NERFINISHED ⓘ |
| locatedNear | Niagara Falls ⓘ |
| locatedOnWatercourse | Niagara River ⓘ |
| nearbyCity | Niagara Falls, New York ⓘ |
| nearbyFacility | Robert Moses Niagara Power Plant ⓘ |
| operator | New York Power Authority ⓘ |
| ownedBy | New York Power Authority ⓘ |
| partOf |
Niagara River hydropower system
ⓘ
surface form:
Niagara Power Project
|
| purpose |
balance electricity supply and demand
ⓘ
energy storage ⓘ peak load management ⓘ |
| regionServed | New York State ⓘ |
| regulates | power output of Niagara Power Project ⓘ |
| regulatoryJurisdiction |
New York State
ⓘ
surface form:
State of New York
United States federal energy authorities ⓘ |
| sector | electric power ⓘ |
| supports |
frequency regulation
ⓘ
grid reliability in New York ⓘ spinning reserve ⓘ voltage support ⓘ |
| usesReservoir | Lewiston Reservoir ⓘ |
| usesTechnology | pumped-storage hydroelectricity ⓘ |
| waterSource | Niagara River ⓘ |
| worksInTandemWith | Robert Moses Niagara Power Plant ⓘ |
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: Lewiston Pump-Generating Plant Description of subject: The Lewiston Pump-Generating Plant is a hydroelectric pumped-storage facility near Niagara Falls that works in tandem with the Robert Moses Niagara Power Plant to balance electricity supply and demand.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Lewiston Pump-Generating Plant reservoir