Castaic Dam
E69543
Castaic Dam is a large embankment dam in Los Angeles County, California, that forms Castaic Lake and plays a key role in water storage and hydroelectric power generation for Southern California.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Castaic Dam canonical | 3 |
| Pyramid Dam | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T495752 — 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: Castaic Dam Context triple: [State Water Project, hasComponent, Castaic Dam]
-
A.
Perris Dam
Perris Dam is a large earthfill embankment dam in Riverside County, California, that forms Lake Perris as part of the state’s major water storage and distribution system.
-
B.
Folsom Dam
Folsom Dam is a large concrete dam on the American River in California that provides flood control, water storage, and hydroelectric power for the Sacramento region.
-
C.
Shasta Dam
Shasta Dam is a large concrete gravity dam on California’s Sacramento River, forming Shasta Lake and serving as a key source of water storage, hydroelectric power, and flood control for the state.
-
D.
New Melones Dam
New Melones Dam is a large multipurpose reservoir and hydroelectric facility on the Stanislaus River in California, providing water storage, flood control, and power generation.
-
E.
Friant Dam
Friant Dam is a major concrete gravity dam on California's San Joaquin River that provides irrigation water, flood control, and hydroelectric power as part of the federal Central Valley Project.
- 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: Castaic Dam Target entity description: Castaic Dam is a large embankment dam in Los Angeles County, California, that forms Castaic Lake and plays a key role in water storage and hydroelectric power generation for Southern California.
-
A.
Perris Dam
Perris Dam is a large earthfill embankment dam in Riverside County, California, that forms Lake Perris as part of the state’s major water storage and distribution system.
-
B.
Folsom Dam
Folsom Dam is a large concrete dam on the American River in California that provides flood control, water storage, and hydroelectric power for the Sacramento region.
-
C.
Shasta Dam
Shasta Dam is a large concrete gravity dam on California’s Sacramento River, forming Shasta Lake and serving as a key source of water storage, hydroelectric power, and flood control for the state.
-
D.
New Melones Dam
New Melones Dam is a large multipurpose reservoir and hydroelectric facility on the Stanislaus River in California, providing water storage, flood control, and power generation.
-
E.
Friant Dam
Friant Dam is a major concrete gravity dam on California's San Joaquin River that provides irrigation water, flood control, and hydroelectric power as part of the federal Central Valley Project.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
embankment dam
ⓘ
hydroelectric dam ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| constructionBegan | 1965 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| forms | Castaic Lake ⓘ |
| hasPowerPlant |
Devil Canyon Powerplant
ⓘ
surface form:
Castaic Power Plant
|
| hasRecreationActivity |
boating
ⓘ
camping ⓘ fishing ⓘ swimming ⓘ |
| hasSpillway | yes ⓘ |
| height |
about 160 meters
ⓘ
about 425 feet ⓘ |
| length |
about 1,230 meters
ⓘ
about 4,200 feet ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
Los Angeles County ⓘ
surface form:
Los Angeles County, California
Southern California ⓘ |
| locatedInProtectedArea |
Castaic Lake
ⓘ
surface form:
Castaic Lake State Recreation Area
|
| locatedNorthOf | Los Angeles ⓘ |
| managedBy | California Department of Water Resources ⓘ |
| material |
earthfill
ⓘ
rockfill ⓘ |
| near |
Castaic, California
ⓘ
Interstate 5 ⓘ
surface form:
Interstate 5 in California
|
| openingDate | 1973 ⓘ |
| operator | California Department of Water Resources ⓘ |
| ownedBy |
California, United States
ⓘ
surface form:
State of California
|
| partOf |
State Water Project
ⓘ
surface form:
California State Water Project
State Water Project ⓘ
surface form:
State Water Project power system
|
| powerPlantCapacity | about 1,275 megawatts ⓘ |
| powerPlantType | pumped-storage hydroelectric plant ⓘ |
| purpose |
flood control
ⓘ
hydroelectric power generation ⓘ recreation ⓘ water storage ⓘ |
| reservoirCapacity | about 323,700 acre-feet ⓘ |
| reservoirName | Castaic Lake ⓘ |
| reservoirSurfaceArea | about 2,200 acres ⓘ |
| river | Castaic Creek ⓘ |
| serves |
Greater Los Angeles Area
ⓘ
surface form:
Greater Los Angeles area
Southern California water users ⓘ |
| status | operational ⓘ |
| waterSource |
California Aqueduct
ⓘ
California Aqueduct ⓘ
surface form:
West Branch California Aqueduct
|
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: Castaic Dam Description of subject: Castaic Dam is a large embankment dam in Los Angeles County, California, that forms Castaic Lake and plays a key role in water storage and hydroelectric power generation for Southern California.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Pyramid Dam