Nimbus Dam
E186071
Nimbus Dam is a concrete gravity dam on the American River in California that forms Lake Natoma and helps regulate water flow, provide hydroelectric power, and support regional water supply and recreation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Nimbus Dam canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T1561658 — 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: Nimbus Dam Context triple: [American River, hasDam, Nimbus Dam]
-
A.
Norris Dam
Norris Dam is a Tennessee Valley Authority hydroelectric dam on the Clinch River in eastern Tennessee, notable as TVA’s first major dam project and a key component of regional flood control and power generation.
-
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.
Melton Hill Dam
Melton Hill Dam is a Tennessee Valley Authority hydroelectric dam on the Clinch River in East Tennessee, forming Melton Hill Lake and providing power generation, recreation, and flood control for the Knoxville area.
-
D.
Croton Dam
Croton Dam is a historic masonry dam on New York’s Croton River that was a key early source of drinking water for New York City and is now a notable landmark within Old Croton Aqueduct State Historic Park.
-
E.
Derby Dam
Derby Dam is an early 20th-century diversion dam on Nevada’s Truckee River, built as part of the Newlands Reclamation Project to supply irrigation water to nearby agricultural lands.
- 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: Nimbus Dam Target entity description: Nimbus Dam is a concrete gravity dam on the American River in California that forms Lake Natoma and helps regulate water flow, provide hydroelectric power, and support regional water supply and recreation.
-
A.
Norris Dam
Norris Dam is a Tennessee Valley Authority hydroelectric dam on the Clinch River in eastern Tennessee, notable as TVA’s first major dam project and a key component of regional flood control and power generation.
-
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.
Melton Hill Dam
Melton Hill Dam is a Tennessee Valley Authority hydroelectric dam on the Clinch River in East Tennessee, forming Melton Hill Lake and providing power generation, recreation, and flood control for the Knoxville area.
-
D.
Croton Dam
Croton Dam is a historic masonry dam on New York’s Croton River that was a key early source of drinking water for New York City and is now a notable landmark within Old Croton Aqueduct State Historic Park.
-
E.
Derby Dam
Derby Dam is an early 20th-century diversion dam on Nevada’s Truckee River, built as part of the Newlands Reclamation Project to supply irrigation water to nearby agricultural lands.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
concrete gravity dam
ⓘ
dam ⓘ |
| associatedWith |
Lake Natoma
ⓘ
surface form:
Lake Natoma State Recreation Area
Nimbus Fish Hatchery ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| constructionMaterial | concrete ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| createsWaterBody | Lake Natoma ⓘ |
| damType | gravity dam ⓘ |
| downstreamFrom | Folsom Dam ⓘ |
| formsReservoir | Lake Natoma ⓘ |
| hasFacility | Nimbus Fish Hatchery ⓘ |
| hasPowerPlant | Nimbus Powerplant ⓘ |
| helpsRegulateReleasesFrom | Folsom Dam ⓘ |
| impounds |
American River (California)
ⓘ
surface form:
American River
|
| locatedIn |
California, United States
ⓘ
surface form:
California
United States of America ⓘ
surface form:
United States
|
| locatedOnRiver |
American River (California)
ⓘ
surface form:
American River
|
| managingAgency |
Bureau of Reclamation
ⓘ
surface form:
United States Bureau of Reclamation
|
| nearCity |
Folsom
ⓘ
surface form:
Folsom, California
|
| operator |
Bureau of Reclamation
ⓘ
surface form:
United States Bureau of Reclamation
|
| partOf |
Central Valley Project
ⓘ
surface form:
American River Division of the Central Valley Project
|
| partOfProject | Central Valley Project ⓘ |
| primaryFunction | regulation of American River flows ⓘ |
| purpose |
flow regulation
ⓘ
hydroelectric power generation ⓘ recreation ⓘ water supply ⓘ |
| region | Sacramento County, California NERFINISHED ⓘ |
| riverSystem |
Sacramento River Basin
ⓘ
surface form:
Sacramento River basin
|
| supports |
downstream environmental flows
ⓘ
fisheries management via Nimbus Fish Hatchery ⓘ recreational boating on Lake Natoma ⓘ regional water management ⓘ |
| supportsRecreationAt | Lake Natoma ⓘ |
| upstreamFrom |
Sacramento
ⓘ
surface form:
Sacramento, California
|
| usedFor |
flood control
ⓘ
hydroelectricity ⓘ irrigation water supply ⓘ municipal water supply ⓘ recreational activities ⓘ |
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: Nimbus Dam Description of subject: Nimbus Dam is a concrete gravity dam on the American River in California that forms Lake Natoma and helps regulate water flow, provide hydroelectric power, and support regional water supply and recreation.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.