San Pablo Reservoir
E840405
San Pablo Reservoir is a large man-made lake and drinking water reservoir in the East Bay region of the San Francisco Bay Area, popular for fishing, boating, and outdoor recreation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| San Pablo Reservoir canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10077026 — 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: San Pablo Reservoir Context triple: [El Sobrante, California, near, San Pablo Reservoir]
-
A.
El Pardo Reservoir
El Pardo Reservoir is a dammed water body near Madrid, Spain, primarily used for water supply, flood control, and recreation along the Manzanares River.
-
B.
San Vicente Reservoir
San Vicente Reservoir is a major water storage lake in San Diego County, California, used for municipal water supply and popular for recreational activities like boating and fishing.
-
C.
Los Barreales Reservoir
Los Barreales Reservoir is an artificial lake in Argentina’s Neuquén Province, created on the Neuquén River and known for hydroelectric use, water regulation, and nearby paleontological sites.
-
D.
Don Pedro Reservoir
Don Pedro Reservoir is a large artificial lake in California’s Sierra Nevada foothills, primarily used for water storage, hydroelectric power generation, and recreation.
-
E.
La Paloma Reservoir
La Paloma Reservoir is a major artificial lake in Chile’s Coquimbo Region, known for supporting irrigation and water supply in the Monte Patria area.
- 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: San Pablo Reservoir Target entity description: San Pablo Reservoir is a large man-made lake and drinking water reservoir in the East Bay region of the San Francisco Bay Area, popular for fishing, boating, and outdoor recreation.
-
A.
El Pardo Reservoir
El Pardo Reservoir is a dammed water body near Madrid, Spain, primarily used for water supply, flood control, and recreation along the Manzanares River.
-
B.
San Vicente Reservoir
San Vicente Reservoir is a major water storage lake in San Diego County, California, used for municipal water supply and popular for recreational activities like boating and fishing.
-
C.
Los Barreales Reservoir
Los Barreales Reservoir is an artificial lake in Argentina’s Neuquén Province, created on the Neuquén River and known for hydroelectric use, water regulation, and nearby paleontological sites.
-
D.
Don Pedro Reservoir
Don Pedro Reservoir is a large artificial lake in California’s Sierra Nevada foothills, primarily used for water storage, hydroelectric power generation, and recreation.
-
E.
La Paloma Reservoir
La Paloma Reservoir is a major artificial lake in Chile’s Coquimbo Region, known for supporting irrigation and water supply in the Monte Patria area.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
drinking water reservoir
ⓘ
reservoir ⓘ |
| accessibleFrom | San Pablo Dam Road NERFINISHED ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| boatingAllowed | yes ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| createdBy | San Pablo Dam NERFINISHED ⓘ |
| fishingAllowed | yes ⓘ |
| formedBy | impoundment of San Pablo Creek ⓘ |
| hasFacility |
boat launch
ⓘ
fishing piers ⓘ picnic areas ⓘ trails ⓘ |
| hasFishSpecies |
catfish
ⓘ
crappie ⓘ largemouth bass ⓘ rainbow trout ⓘ smallmouth bass ⓘ sunfish ⓘ |
| hasRegulation |
no body-contact water sports
ⓘ
requires fishing license ⓘ |
| locatedIn |
Contra Costa County, California
NERFINISHED
ⓘ
East Bay NERFINISHED ⓘ San Francisco Bay Area ⓘ |
| managedBy | East Bay Municipal Utility District NERFINISHED ⓘ |
| motorBoatsAllowed | yes ⓘ |
| nearestCity |
El Sobrante, California
NERFINISHED
ⓘ
Orinda, California NERFINISHED ⓘ |
| operator | East Bay Municipal Utility District NERFINISHED ⓘ |
| ownedBy | East Bay Municipal Utility District NERFINISHED ⓘ |
| partOf |
East Bay Municipal Utility District water system
NERFINISHED
ⓘ
San Pablo Creek watershed ⓘ |
| primaryUse |
drinking water storage
ⓘ
municipal water supply ⓘ |
| recreationManagedBy | California Parks Company NERFINISHED ⓘ |
| region | Northern California ⓘ |
| secondaryUse |
boating
ⓘ
fishing ⓘ hiking ⓘ picnicking ⓘ recreation ⓘ |
| state |
California, United States
ⓘ
surface form:
California
|
| suppliesWaterTo | East Bay communities ⓘ |
| surfaceArea |
approximately 3.5 square kilometers
ⓘ
approximately 860 acres ⓘ |
| swimmingAllowed | no ⓘ |
| typeOfDam | earthen dam ⓘ |
| watercourse | San Pablo Creek 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: San Pablo Reservoir Description of subject: San Pablo Reservoir is a large man-made lake and drinking water reservoir in the East Bay region of the San Francisco Bay Area, popular for fishing, boating, and outdoor recreation.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.