Imperial Dam
E197547
Imperial Dam is a major diversion dam on the lower Colorado River in the southwestern United States that supplies irrigation water to agricultural regions in Arizona and California.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Imperial Dam canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T1669331 — 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: Imperial Dam Context triple: [Colorado River, hasDam, Imperial Dam]
-
A.
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.
-
B.
Denison Dam
Denison Dam is a large earthen dam on the Red River between Texas and Oklahoma, built for flood control, hydroelectric power generation, and water supply.
-
C.
Hollywood Dam
Hollywood Dam is a concrete arch-gravity dam in the Hollywood Hills of Los Angeles that impounds the Hollywood Reservoir as part of the city’s water supply system.
-
D.
Red Rock Dam
Red Rock Dam is a large flood-control and hydroelectric dam on the Des Moines River in central Iowa, forming Lake Red Rock as the state’s largest reservoir.
-
E.
Conklingville Dam
Conklingville Dam is a concrete gravity dam in New York that created the Great Sacandaga Lake reservoir for flood control and hydroelectric power generation.
- 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: Imperial Dam Target entity description: Imperial Dam is a major diversion dam on the lower Colorado River in the southwestern United States that supplies irrigation water to agricultural regions in Arizona and California.
-
A.
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.
-
B.
Denison Dam
Denison Dam is a large earthen dam on the Red River between Texas and Oklahoma, built for flood control, hydroelectric power generation, and water supply.
-
C.
Hollywood Dam
Hollywood Dam is a concrete arch-gravity dam in the Hollywood Hills of Los Angeles that impounds the Hollywood Reservoir as part of the city’s water supply system.
-
D.
Red Rock Dam
Red Rock Dam is a large flood-control and hydroelectric dam on the Des Moines River in central Iowa, forming Lake Red Rock as the state’s largest reservoir.
-
E.
Conklingville Dam
Conklingville Dam is a concrete gravity dam in New York that created the Great Sacandaga Lake reservoir for flood control and hydroelectric power generation.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
concrete dam
ⓘ
diversion dam ⓘ gravity dam ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| constructionBy |
Bureau of Reclamation
ⓘ
surface form:
United States Bureau of Reclamation
|
| constructionStart | 1936 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| crosses | Colorado River ⓘ |
| designedFor | sediment control ⓘ |
| elevation | about 130 feet above sea level ⓘ |
| feeds |
All-American Canal
ⓘ
Gila Gravity Main Canal ⓘ Gila Gravity Main Canal ⓘ
surface form:
Yuma Main Canal
|
| function | diverts Colorado River water into irrigation canals ⓘ |
| hasComponent |
desilting works
ⓘ
headworks of All-American Canal ⓘ headworks of Gila Gravity Main Canal ⓘ headworks of Yuma Main Canal ⓘ sluice gates ⓘ spillway ⓘ |
| locatedDownstreamOf |
Davis Dam
ⓘ
Hoover Dam ⓘ Parker Dam ⓘ |
| locatedIn |
Arizona
ⓘ
California, United States ⓘ
surface form:
California
Imperial County ⓘ
surface form:
Imperial County, California
Yuma County, Arizona ⓘ southwestern United States ⓘ |
| locatedUpstreamOf | Yuma, Arizona ⓘ |
| managingAgency |
Bureau of Reclamation
ⓘ
surface form:
United States Bureau of Reclamation
|
| namedAfter | Imperial Valley ⓘ |
| near |
Winterhaven, California
ⓘ
Yuma, Arizona ⓘ |
| openingDate | 1938 ⓘ |
| operator |
Bureau of Reclamation
ⓘ
surface form:
United States Bureau of Reclamation
|
| partOf | Lower Colorado River Project ⓘ |
| purpose |
agricultural water supply
ⓘ
irrigation water diversion ⓘ |
| region |
Colorado River
ⓘ
surface form:
Lower Colorado River
|
| river | Colorado River ⓘ |
| riverMile | about 49 miles upstream of the Colorado River–Gulf of California limitrophe line ⓘ |
| servesRegion |
Bard Valley, California
ⓘ
Imperial Valley ⓘ
surface form:
Imperial Valley, California
Yuma County Water Users’ Association lands ⓘ Lower Colorado River Project ⓘ
surface form:
Yuma Project, Arizona
|
| status | operational ⓘ |
| waterSourceFor | over 500,000 acres of farmland ⓘ |
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: Imperial Dam Description of subject: Imperial Dam is a major diversion dam on the lower Colorado River in the southwestern United States that supplies irrigation water to agricultural regions in Arizona and California.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.