New Melones Dam
E64304
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| New Melones Dam canonical | 5 |
| New Melones Lake | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T474333 — 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: New Melones Dam Context triple: [Central Valley Project, includes, New Melones Dam]
-
A.
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.
-
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.
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.
-
D.
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.
-
E.
Trinity Dam
Trinity Dam is a major earthfill dam on the Trinity River in Northern California, forming Trinity Lake and providing water storage, hydroelectric power, and flood control as part of the state’s large federal water management system.
- 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: New Melones Dam Target entity description: 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.
-
A.
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.
-
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.
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.
-
D.
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.
-
E.
Trinity Dam
Trinity Dam is a major earthfill dam on the Trinity River in Northern California, forming Trinity Lake and providing water storage, hydroelectric power, and flood control as part of the state’s large federal water management system.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
concrete arch dam
ⓘ
hydroelectric facility ⓘ multipurpose dam ⓘ |
| basinCountry |
United States
ⓘ
linked to:
United States of America
|
| completedIn | 1979 ⓘ |
| constructionBegan | 1966 ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| crosses | Stanislaus River ⓘ |
| hasControversy |
environmental impacts on the Stanislaus River
ⓘ
inundation of whitewater recreation reaches ⓘ loss of historic and archaeological sites ⓘ |
| hasPowerPlant | yes ⓘ |
| hasPurpose |
flood control
ⓘ
hydroelectric power generation ⓘ irrigation supply ⓘ recreation ⓘ water storage ⓘ |
| hasSpillway | yes ⓘ |
| height |
about 191 meters
ⓘ
about 625 feet ⓘ |
| impounds |
New Melones Lake
ⓘ
linked to:
New Melones Dam
|
| installedCapacity | about 300 megawatts ⓘ |
| length |
about 1,560 feet
ⓘ
about 475 meters ⓘ |
| locatedIn |
Calaveras County, California
ⓘ
linked to:
Calaveras County
California ⓘ
linked to:
California, United States
Tuolumne County, California ⓘ
linked to:
Tuolumne County
|
| locatedOnRiver | Stanislaus River ⓘ |
| managedBy |
United States Bureau of Reclamation
ⓘ
linked to:
Bureau of Reclamation
|
| nearCity |
Angels Camp, California
ⓘ
linked to:
Angels Camp
Sonora, California ⓘ |
| nearProtectedArea | Stanislaus River canyon ⓘ |
| openedIn | 1979 ⓘ |
| operator |
United States Bureau of Reclamation
ⓘ
linked to:
Bureau of Reclamation
|
| ownedBy | United States government ⓘ |
| partOf |
Central Valley Project
ⓘ
Stanislaus River watershed ⓘ
linked to:
Stanislaus River
|
| powerPlantType | conventional hydroelectric power plant ⓘ |
| provides |
flood protection for downstream communities
ⓘ
recreational opportunities such as boating and fishing ⓘ water for irrigation in California’s Central Valley ⓘ |
| replaced | Old Melones Dam ⓘ |
| reservoirCapacity |
about 2,400,000 acre-feet
ⓘ
about 3.0 cubic kilometers ⓘ |
| reservoirName |
New Melones Lake
ⓘ
linked to:
New Melones Dam
|
| reservoirSurfaceArea | about 12,500 acres ⓘ |
| spillwayType | gated overflow spillway ⓘ |
| usedFor | municipal and industrial water supply ⓘ |
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: New Melones Dam Description of subject: 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.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: New Melones Dam
linked to: New Melones Dam
linked to: New Melones Dam
linked to: New Melones Dam
subject linked to:
Columbia
linked to: New Melones Dam