O’Neill Forebay
E341832
O’Neill Forebay is a regulating reservoir in California’s San Joaquin Valley that helps manage water storage and delivery for the larger San Luis Reservoir system.
All labels observed (1)
| Label | Occurrences |
|---|---|
| O’Neill Forebay canonical | 6 |
How this entity was disambiguated
This entity first appeared as the object of triple T3109170 — 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: O’Neill Forebay Context triple: [San Luis Reservoir, hasPart, O’Neill Forebay]
-
A.
Piute Dam
Piute Dam is an irrigation and water storage structure on the Sevier River in south-central Utah, forming Piute Reservoir to support agriculture in the surrounding region.
-
B.
O'Shaughnessy Dam
O'Shaughnessy Dam is a concrete arch-gravity dam in Yosemite National Park that creates the Hetch Hetchy Reservoir, supplying water and hydroelectric power to the San Francisco Bay Area.
-
C.
Oxbow Dam
Oxbow Dam is a hydroelectric dam on the Snake River in eastern Oregon, forming Oxbow Reservoir as part of the Hells Canyon Complex.
-
D.
McNary Dam
McNary Dam is a large hydroelectric dam and navigation lock complex on the Columbia River in the Pacific Northwest of the United States.
-
E.
Yuba Reservoir
Yuba Reservoir is a man-made lake in central Utah popular for boating, fishing, and camping.
- 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: O’Neill Forebay Target entity description: O’Neill Forebay is a regulating reservoir in California’s San Joaquin Valley that helps manage water storage and delivery for the larger San Luis Reservoir system.
-
A.
Piute Dam
Piute Dam is an irrigation and water storage structure on the Sevier River in south-central Utah, forming Piute Reservoir to support agriculture in the surrounding region.
-
B.
O'Shaughnessy Dam
O'Shaughnessy Dam is a concrete arch-gravity dam in Yosemite National Park that creates the Hetch Hetchy Reservoir, supplying water and hydroelectric power to the San Francisco Bay Area.
-
C.
Oxbow Dam
Oxbow Dam is a hydroelectric dam on the Snake River in eastern Oregon, forming Oxbow Reservoir as part of the Hells Canyon Complex.
-
D.
McNary Dam
McNary Dam is a large hydroelectric dam and navigation lock complex on the Columbia River in the Pacific Northwest of the United States.
-
E.
Yuba Reservoir
Yuba Reservoir is a man-made lake in central Utah popular for boating, fishing, and camping.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
artificial lake
ⓘ
regulating reservoir ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| connectedTo |
California Aqueduct
ⓘ
Delta-Mendota Canal ⓘ
surface form:
Delta–Mendota Canal
|
| country |
United States of America
ⓘ
surface form:
United States
|
| elevation | approximately 220 feet above sea level ⓘ |
| hasDam | O’Neill Dam ⓘ |
| hasFunction | forebay for pumping and generating facilities ⓘ |
| hasRecreationArea | O’Neill Forebay Wildlife Area ⓘ |
| inflow |
California Aqueduct
ⓘ
Delta-Mendota Canal ⓘ
surface form:
Delta–Mendota Canal
|
| isReservoirOf |
Central Valley Project
ⓘ
surface form:
San Luis Unit of the Central Valley Project
State Water Project’s South Bay and San Luis canals ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
Merced County, California NERFINISHED ⓘ San Joaquin Valley ⓘ |
| locatedNear |
Los Banos, California
ⓘ
San Luis Reservoir ⓘ |
| manages |
water delivery
ⓘ
water storage ⓘ |
| namedAfter | Ralph B. O’Neill ⓘ |
| operator |
California Department of Water Resources
ⓘ
Bureau of Reclamation ⓘ
surface form:
United States Bureau of Reclamation
|
| outflow |
California Aqueduct
ⓘ
Delta-Mendota Canal ⓘ
surface form:
Delta–Mendota Canal
|
| partOf |
San Luis Reservoir
ⓘ
surface form:
San Luis Reservoir system
|
| partOfProject |
State Water Project
ⓘ
surface form:
California State Water Project
Central Valley Project ⓘ |
| purpose |
water conveyance
ⓘ
water regulation ⓘ water storage ⓘ |
| receivesWaterFrom | San Luis Reservoir ⓘ |
| region | Central California ⓘ |
| regulates | flows from San Luis Reservoir ⓘ |
| usedFor |
industrial water supply
ⓘ
irrigation water supply ⓘ municipal water supply ⓘ recreation ⓘ |
| waterManagementRole |
buffers changes in pumping operations at San Luis facilities
ⓘ
regulates short-term fluctuations in water deliveries ⓘ |
| waterSource |
Sacramento–San Joaquin River Delta
ⓘ
surface form:
Sacramento–San Joaquin River Delta (via aqueducts)
|
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: O’Neill Forebay Description of subject: O’Neill Forebay is a regulating reservoir in California’s San Joaquin Valley that helps manage water storage and delivery for the larger San Luis Reservoir system.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.