Los Angeles Aqueduct
E75916
The Los Angeles Aqueduct is a major early-20th-century water conveyance system that transports water from California’s Owens Valley to the city of Los Angeles, profoundly shaping the region’s growth and sparking enduring environmental and political controversies.
All labels observed (8)
How this entity was disambiguated
This entity first appeared as the object of triple T571015 — 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: Los Angeles Aqueduct Context triple: [Owens Valley, knownFor, Los Angeles Aqueduct]
-
A.
California Aqueduct
The California Aqueduct is a major man-made water conveyance system in California that transports water hundreds of miles from the state’s northern regions to its drier central and southern areas.
-
B.
South Bay Aqueduct
South Bay Aqueduct is a major California water conveyance facility that transports water from the State Water Project to communities in the southern San Francisco Bay Area.
-
C.
Friant-Kern Canal
The Friant-Kern Canal is a major irrigation and water conveyance canal in California’s San Joaquin Valley that delivers diverted San Joaquin River water to farms and communities across the southern Central Valley.
-
D.
North Bay Aqueduct
The North Bay Aqueduct is a key water conveyance facility in California that delivers State Water Project supplies to communities in Solano and Napa counties.
-
E.
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.
- 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: Los Angeles Aqueduct Target entity description: The Los Angeles Aqueduct is a major early-20th-century water conveyance system that transports water from California’s Owens Valley to the city of Los Angeles, profoundly shaping the region’s growth and sparking enduring environmental and political controversies.
-
A.
California Aqueduct
The California Aqueduct is a major man-made water conveyance system in California that transports water hundreds of miles from the state’s northern regions to its drier central and southern areas.
-
B.
South Bay Aqueduct
South Bay Aqueduct is a major California water conveyance facility that transports water from the State Water Project to communities in the southern San Francisco Bay Area.
-
C.
Friant-Kern Canal
The Friant-Kern Canal is a major irrigation and water conveyance canal in California’s San Joaquin Valley that delivers diverted San Joaquin River water to farms and communities across the southern Central Valley.
-
D.
North Bay Aqueduct
The North Bay Aqueduct is a key water conveyance facility in California that delivers State Water Project supplies to communities in Solano and Napa counties.
-
E.
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.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
aqueduct
ⓘ
water conveyance system ⓘ |
| chiefEngineer | William Mulholland ⓘ |
| constructionMethod | gravity-fed system ⓘ |
| constructionStartDate | 1908 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| designedFor |
municipal water supply
ⓘ
urban growth support ⓘ |
| effect |
caused ecological changes in Owens River and Owens Lake
ⓘ
enabled rapid growth of Los Angeles in the 20th century ⓘ reduced water availability in Owens Valley ⓘ |
| endLocation |
Los Angeles
ⓘ
surface form:
City of Los Angeles
|
| endPoint | Los Angeles ⓘ |
| environmentalIssue |
dust pollution from Owens Lake bed
ⓘ
habitat loss in Owens Valley wetlands ⓘ |
| hasJurisdiction |
Los Angeles
ⓘ
surface form:
City of Los Angeles
|
| hasPart |
Los Angeles Aqueduct
self-linksurface differs
ⓘ
surface form:
First Los Angeles Aqueduct
Los Angeles Aqueduct self-linksurface differs ⓘ
surface form:
Second Los Angeles Aqueduct
|
| heritageDesignation |
National Historic Civil Engineering Landmark
ⓘ
surface form:
American Society of Civil Engineers Historic Civil Engineering Landmark
|
| inception | 1908 ⓘ |
| length | approximately 419 miles ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
|
| locatedInTimePeriod | early 20th century ⓘ |
| openedBy | William Mulholland ⓘ |
| openingDate | 1913 ⓘ |
| operator | Los Angeles Department of Water and Power ⓘ |
| owner | Los Angeles Department of Water and Power ⓘ |
| partOf | Los Angeles water supply system ⓘ |
| politicalIssue |
urban versus rural water allocation
ⓘ
water rights in Eastern California ⓘ |
| regionServed |
Los Angeles
ⓘ
Southern California ⓘ |
| routePassesThrough |
Antelope Valley
ⓘ
Mojave Desert ⓘ Owens Valley ⓘ |
| significantEvent |
Owens Lake desiccation
ⓘ
Owens Valley farmers’ sabotage actions in the 1920s ⓘ Owens Valley water wars ⓘ
surface form:
Owens Valley water rights controversy
environmental conflicts in Owens Valley ⓘ |
| startLocation | Owens Valley ⓘ |
| startPoint | Owens River ⓘ |
| subjectOf |
Chinatown film series
ⓘ
surface form:
Chinatown (1974 film)
numerous environmental studies ⓘ |
| uses |
canals
ⓘ
conduits ⓘ siphons ⓘ tunnels ⓘ |
| waterSource |
Eastern Sierra Nevada snowmelt
ⓘ
Owens 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: Los Angeles Aqueduct Description of subject: The Los Angeles Aqueduct is a major early-20th-century water conveyance system that transports water from California’s Owens Valley to the city of Los Angeles, profoundly shaping the region’s growth and sparking enduring environmental and political controversies.
Referenced by (16)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Los Angeles Aqueduct project
this entity surface form:
Los Angeles Aqueduct system watershed
this entity surface form:
First Los Angeles Aqueduct
this entity surface form:
Second Los Angeles Aqueduct
this entity surface form:
Los Angeles Aqueduct system
subject surface form:
Evelyn Mulwray
this entity surface form:
Los Angeles aqueduct
this entity surface form:
Los Angeles Aqueduct system
this entity surface form:
Los Angeles Aqueduct system (regional water management context)