Madera Canal
E304799
Madera Canal is an irrigation and water-conveyance canal in California’s Central Valley that delivers San Joaquin River water to agricultural lands and communities in Madera County.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Madera Canal canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T2844722 — 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: Madera Canal Context triple: [Friant Dam, suppliesWaterTo, Madera Canal]
-
A.
Tehama-Colusa Canal
The Tehama-Colusa Canal is a major irrigation and water conveyance canal in California’s Sacramento Valley that delivers Central Valley Project water to agricultural lands and communities.
-
B.
Contra Costa Canal
The Contra Costa Canal is a man-made waterway in California that delivers irrigation and municipal water from the Sacramento–San Joaquin Delta to communities in Contra Costa County.
-
C.
Delta-Mendota Canal
The Delta-Mendota Canal is a major irrigation and water conveyance canal in California’s Central Valley that transports water from the Sacramento–San Joaquin Delta to agricultural and urban users in the San Joaquin Valley.
-
D.
Chicago Sanitary and Ship Canal
The Chicago Sanitary and Ship Canal is a man-made waterway in Illinois that reverses the flow of the Chicago River, diverts wastewater away from Lake Michigan, and serves as a key navigation link between the Great Lakes and the Mississippi River system.
-
E.
Küsten Canal
The Küsten Canal is a major shipping canal in northwestern Germany that links the Ems and Weser river systems and supports regional inland water transport.
- 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: Madera Canal Target entity description: Madera Canal is an irrigation and water-conveyance canal in California’s Central Valley that delivers San Joaquin River water to agricultural lands and communities in Madera County.
-
A.
Tehama-Colusa Canal
The Tehama-Colusa Canal is a major irrigation and water conveyance canal in California’s Sacramento Valley that delivers Central Valley Project water to agricultural lands and communities.
-
B.
Contra Costa Canal
The Contra Costa Canal is a man-made waterway in California that delivers irrigation and municipal water from the Sacramento–San Joaquin Delta to communities in Contra Costa County.
-
C.
Delta-Mendota Canal
The Delta-Mendota Canal is a major irrigation and water conveyance canal in California’s Central Valley that transports water from the Sacramento–San Joaquin Delta to agricultural and urban users in the San Joaquin Valley.
-
D.
Chicago Sanitary and Ship Canal
The Chicago Sanitary and Ship Canal is a man-made waterway in Illinois that reverses the flow of the Chicago River, diverts wastewater away from Lake Michigan, and serves as a key navigation link between the Great Lakes and the Mississippi River system.
-
E.
Küsten Canal
The Küsten Canal is a major shipping canal in northwestern Germany that links the Ems and Weser river systems and supports regional inland water transport.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
irrigation canal
ⓘ
water-conveyance canal ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| hasFunction |
delivery of surface water for irrigation
ⓘ
municipal and industrial water supply ⓘ |
| infrastructureType | concrete-lined canal ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
Central Valley ⓘ Madera County ⓘ |
| locatedInHydrologicRegion |
San Joaquin River Basin
ⓘ
surface form:
San Joaquin hydrologic region
|
| locatedInWatershed | San Joaquin River Basin ⓘ |
| locatedOnRiver | San Joaquin River ⓘ |
| managingAgency |
Bureau of Reclamation
ⓘ
surface form:
United States Bureau of Reclamation
|
| opened | 20th century ⓘ |
| owner | United States government ⓘ |
| partOf | Central Valley Project ⓘ |
| purpose |
irrigation
ⓘ
water conveyance ⓘ |
| regionServed | Madera Irrigation District service area ⓘ |
| serves |
agricultural lands in Madera County
ⓘ
communities in Madera County ⓘ |
| startPoint | Friant Dam ⓘ |
| state |
California, United States
ⓘ
surface form:
California
|
| usesWaterSource | San Joaquin River ⓘ |
| watercourse | San Joaquin River ⓘ |
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: Madera Canal Description of subject: Madera Canal is an irrigation and water-conveyance canal in California’s Central Valley that delivers San Joaquin River water to agricultural lands and communities in Madera County.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.