Lower Otay Reservoir
E825150
Lower Otay Reservoir is a man-made lake in San Diego County, California, serving as a major municipal water supply and recreational area.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Lower Otay Reservoir canonical | 4 |
| Lower Otay Reservoir Recreation Area | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9767201 — 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: Lower Otay Reservoir Context triple: [Otay River, impoundedBy, Lower Otay Reservoir]
-
A.
Upper Otay Reservoir
Upper Otay Reservoir is a small man-made lake in San Diego County, California, primarily used for water storage and recreational activities such as fishing and wildlife observation.
-
B.
San Carlos Reservoir
San Carlos Reservoir is a large artificial lake on the Gila River in Arizona, primarily used for irrigation, flood control, and recreation.
-
C.
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.
-
D.
Martinez Reservoir
Martinez Reservoir is a man-made water storage facility in Contra Costa County, California, used for municipal and irrigation supply as part of the region’s canal and water management system.
-
E.
Abiquiu Reservoir
Abiquiu Reservoir is a man-made lake in northern New Mexico known for its scenic desert landscape, recreational opportunities, and role in regional water storage and management.
- 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: Lower Otay Reservoir Target entity description: Lower Otay Reservoir is a man-made lake in San Diego County, California, serving as a major municipal water supply and recreational area.
-
A.
Upper Otay Reservoir
Upper Otay Reservoir is a small man-made lake in San Diego County, California, primarily used for water storage and recreational activities such as fishing and wildlife observation.
-
B.
San Carlos Reservoir
San Carlos Reservoir is a large artificial lake on the Gila River in Arizona, primarily used for irrigation, flood control, and recreation.
-
C.
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.
-
D.
Martinez Reservoir
Martinez Reservoir is a man-made water storage facility in Contra Costa County, California, used for municipal and irrigation supply as part of the region’s canal and water management system.
-
E.
Abiquiu Reservoir
Abiquiu Reservoir is a man-made lake in northern New Mexico known for its scenic desert landscape, recreational opportunities, and role in regional water storage and management.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
municipal water supply reservoir
ⓘ
reservoir ⓘ |
| basinCountry |
United States
ⓘ
linked to:
United States of America
|
| constructionStartDate | early 1900s ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| formedBy | Lower Otay Dam ⓘ |
| hasAccessRoad | Otay Lakes Road ⓘ |
| hasActivityRestriction | no body contact with water ⓘ |
| hasDam | Lower Otay Dam ⓘ |
| hasFishSpecies |
bluegill
ⓘ
channel catfish ⓘ crappie ⓘ largemouth bass ⓘ sunfish ⓘ |
| hasNearbyCity |
San Diego, California
ⓘ
linked to:
San Diego, California, United States
|
| hasNearbyFeature |
Otay Mountain
ⓘ
linked to:
Otay Mountain Wilderness
Upper Otay Reservoir ⓘ |
| hasRecreationArea |
Lower Otay Reservoir Recreation Area
ⓘ
linked to:
Lower Otay Reservoir
|
| hasRegulation | California Department of Fish and Wildlife fishing regulations apply ⓘ |
| hasTypeOfShoreline | chaparral and grassland surroundings ⓘ |
| inflow | Otay River ⓘ |
| isMonitoredBy |
San Diego County water authorities
ⓘ
linked to:
San Diego County Water Authority
|
| isOwnedBy |
City of San Diego
ⓘ
linked to:
San Diego
|
| isPartOf |
San Diego County reservoir system
ⓘ
linked to:
San Diego County Water System
|
| isPopularFor | bass fishing tournaments ⓘ |
| isSubjectTo | drought-related water level fluctuations ⓘ |
| locatedIn |
California
ⓘ
linked to:
California, United States
Otay River watershed ⓘ
linked to:
Otay River
San Diego County, California ⓘ
linked to:
San Diego County
|
| locatedInProtectedArea |
Otay Ranch area (partly conserved lands)
ⓘ
linked to:
Otay Ranch
|
| locatedNear |
Chula Vista, California
ⓘ
linked to:
Chula Vista
Otay Mesa, San Diego ⓘ
linked to:
Otay Mesa
|
| managedBy | City of San Diego Public Utilities Department ⓘ |
| openFor | day-use recreation ⓘ |
| outflow | Otay River ⓘ |
| partOf |
San Diego municipal water system
ⓘ
linked to:
San Diego County Water System
|
| region | Southern California ⓘ |
| usedFor |
boating
ⓘ
fishing ⓘ kayaking ⓘ municipal water supply ⓘ recreation ⓘ sailing ⓘ wildlife habitat ⓘ |
| watercourse | Otay 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: Lower Otay Reservoir Description of subject: Lower Otay Reservoir is a man-made lake in San Diego County, California, serving as a major municipal water supply and recreational area.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Lower Otay Reservoir