DeCew Falls Generating Stations
E888696
electric power station
hydroelectric power plant complex
hydroelectric power station
industrial heritage site
DeCew Falls Generating Stations are a pair of historic hydroelectric power plants near St. Catharines, Ontario, that harness water from the Welland Canal to produce electricity.
All labels observed (4)
| Label | Occurrences |
|---|---|
| DeCew Falls Generating Station | 1 |
| DeCew Falls Generating Station I | 1 |
| DeCew Falls Generating Station II | 1 |
| DeCew Falls Generating Stations canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10833607 — 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: DeCew Falls Generating Stations Context triple: [Ontario Power Generation, operatesFacility, DeCew Falls Generating Stations]
-
A.
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.
-
B.
Muskrat Falls Generating Station
Muskrat Falls Generating Station is a large hydroelectric power facility on the lower Churchill River in Labrador, Canada, developed to supply renewable electricity to Newfoundland and Labrador and beyond.
-
C.
Churchill Falls Generating Station
Churchill Falls Generating Station is one of the world’s largest underground hydroelectric power plants, located on the Churchill River in Labrador, Canada.
-
D.
Seven Sisters Falls Generating Station
Seven Sisters Falls Generating Station is a major hydroelectric power plant in Manitoba, Canada, known for harnessing the Winnipeg River to generate electricity for the region.
-
E.
La Tuque Generating Station
La Tuque Generating Station is a major hydroelectric power plant in Quebec, Canada, that harnesses the flow of the Saint-Maurice River to generate electricity.
- 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: DeCew Falls Generating Stations Target entity description: DeCew Falls Generating Stations are a pair of historic hydroelectric power plants near St. Catharines, Ontario, that harness water from the Welland Canal to produce electricity.
-
A.
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.
-
B.
Muskrat Falls Generating Station
Muskrat Falls Generating Station is a large hydroelectric power facility on the lower Churchill River in Labrador, Canada, developed to supply renewable electricity to Newfoundland and Labrador and beyond.
-
C.
Churchill Falls Generating Station
Churchill Falls Generating Station is one of the world’s largest underground hydroelectric power plants, located on the Churchill River in Labrador, Canada.
-
D.
Seven Sisters Falls Generating Station
Seven Sisters Falls Generating Station is a major hydroelectric power plant in Manitoba, Canada, known for harnessing the Winnipeg River to generate electricity for the region.
-
E.
La Tuque Generating Station
La Tuque Generating Station is a major hydroelectric power plant in Quebec, Canada, that harnesses the flow of the Saint-Maurice River to generate electricity.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
electric power station
ⓘ
hydroelectric power plant complex ⓘ hydroelectric power station ⓘ industrial heritage site ⓘ |
| constructionMaterial |
concrete
ⓘ
steel ⓘ |
| continent | North America ⓘ |
| country | Canada ⓘ |
| countryServed | Canada NERFINISHED ⓘ |
| energyConversion | hydraulic energy to electrical energy ⓘ |
| energySourceType | renewable energy ⓘ |
| fuelType | water ⓘ |
| gridConnection | Ontario electricity grid NERFINISHED ⓘ |
| hasFunction | electricity generation ⓘ |
| hasInfrastructureType |
penstock
ⓘ
powerhouse ⓘ switchyard ⓘ |
| hasPart |
DeCew Falls Generating Station I
NERFINISHED
ⓘ
DeCew Falls Generating Station II NERFINISHED ⓘ |
| hasTurbineType | water turbine ⓘ |
| heritageStatus | historic hydroelectric facility ⓘ |
| industry | electric power industry ⓘ |
| isHistoricSiteInOntario | true ⓘ |
| isHydroelectricPlantOnArtificialWaterway | true ⓘ |
| isStillInOperation | true ⓘ |
| locatedIn |
Niagara Region
NERFINISHED
ⓘ
Ontario ⓘ St. Catharines NERFINISHED ⓘ |
| locatedInBasin | Great Lakes Basin NERFINISHED ⓘ |
| locatedInTimeZone | Eastern Time Zone ⓘ |
| locatedInWatershed | Niagara Peninsula watershed ⓘ |
| locatedNear |
DeCew Falls
NERFINISHED
ⓘ
Lake Moodie NERFINISHED ⓘ Welland Canal NERFINISHED ⓘ |
| locatedOnWatercourse | Twelve Mile Creek NERFINISHED ⓘ |
| nearCity | St. Catharines NERFINISHED ⓘ |
| operator | Ontario Power Generation NERFINISHED ⓘ |
| ownedBy | Ontario Power Generation NERFINISHED ⓘ |
| partOf | Ontario power system ⓘ |
| powerPlantType | run-of-river hydroelectric plant ⓘ |
| primaryEnergySource | hydropower ⓘ |
| regionServed | Ontario ⓘ |
| usesCanalWaterForGeneration | true ⓘ |
| usesWaterFrom | Welland Canal NERFINISHED ⓘ |
| waterSource | Welland Canal NERFINISHED ⓘ |
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: DeCew Falls Generating Stations Description of subject: DeCew Falls Generating Stations are a pair of historic hydroelectric power plants near St. Catharines, Ontario, that harness water from the Welland Canal to produce electricity.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
DeCew Falls Generating Station
this entity surface form:
DeCew Falls Generating Station I
this entity surface form:
DeCew Falls Generating Station II