Oroville Dam
E68419
Oroville Dam is a large earthfill embankment dam on the Feather River in Northern California, serving as a key water storage, flood control, and hydroelectric facility.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Oroville Dam canonical | 11 |
| Oroville Dam Project | 1 |
| Oroville Dam complex | 1 |
| Oroville Dam emergency spillway | 1 |
| Oroville Facilities of the State Water Project | 1 |
| Oroville–Thermalito Complex | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T495743 — 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: Oroville Dam Context triple: [State Water Project, hasComponent, Oroville Dam]
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
Grand Coulee Dam
Grand Coulee Dam is a massive concrete gravity dam on the Columbia River in Washington State, renowned as one of the largest power-producing facilities in the United States and a landmark of New Deal–era infrastructure.
-
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: Oroville Dam Target entity description: Oroville Dam is a large earthfill embankment dam on the Feather River in Northern California, serving as a key water storage, flood control, and hydroelectric facility.
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
Grand Coulee Dam
Grand Coulee Dam is a massive concrete gravity dam on the Columbia River in Washington State, renowned as one of the largest power-producing facilities in the United States and a landmark of New Deal–era infrastructure.
-
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 |
earthfill dam
ⓘ
embankment dam ⓘ hydroelectric dam ⓘ reservoir dam ⓘ |
| baseWidth | approximately 3,500 feet ⓘ |
| constructionMaterial | earthfill ⓘ |
| constructionStartDate | 1961 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| crestElevation | approximately 922 feet above sea level ⓘ |
| crestWidth | approximately 44 feet ⓘ |
| downstreamCity |
City of Oroville, California
ⓘ
surface form:
Oroville, California
|
| evacuationOrderDate | February 2017 ⓘ |
| hasAuxiliarySpillway | yes ⓘ |
| height |
approximately 235 meters
ⓘ
approximately 770 feet ⓘ |
| impounds | Lake Oroville ⓘ |
| installedCapacity | approximately 819 megawatts ⓘ |
| length |
approximately 2,110 meters
ⓘ
approximately 6,920 feet ⓘ |
| locatedIn |
Butte County
ⓘ
surface form:
Butte County, California
California, United States ⓘ
surface form:
California
|
| locatedNear |
City of Oroville, California
ⓘ
surface form:
Oroville, California
|
| locatedOnRiver | Feather River ⓘ |
| managingAgency | California Natural Resources Agency ⓘ |
| notableEvent | 2017 spillway damage and evacuation incident ⓘ |
| numberOfSpillwayGates | 8 ⓘ |
| openingDate | 1968 ⓘ |
| operator | California Department of Water Resources ⓘ |
| owner | California Department of Water Resources ⓘ |
| partOf |
State Water Project
ⓘ
surface form:
California State Water Project
|
| powerPlantName |
Hyatt Powerplant
ⓘ
surface form:
Edward Hyatt Powerplant
|
| powerPlantType | underground power station ⓘ |
| providesFloodProtectionTo | downstream communities along the Feather River ⓘ |
| providesIrrigationWaterTo | agricultural users in Central and Southern California ⓘ |
| providesWaterSupplyFor | municipal and industrial users in California ⓘ |
| providesWaterTo |
State Water Project
ⓘ
surface form:
State Water Project aqueduct system
|
| purpose |
flood control
ⓘ
hydroelectric power generation ⓘ recreation ⓘ water storage ⓘ |
| regionServed |
Central Valley
ⓘ
surface form:
Central Valley of California
San Joaquin Valley ⓘ |
| reservoirCapacity | approximately 3,537,000 acre-feet ⓘ |
| reservoirName | Lake Oroville ⓘ |
| reservoirSurfaceArea | approximately 15,800 acres ⓘ |
| riverBasin | Sacramento River Basin ⓘ |
| spillwayType | gated concrete chute spillway ⓘ |
| status | operational ⓘ |
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: Oroville Dam Description of subject: Oroville Dam is a large earthfill embankment dam on the Feather River in Northern California, serving as a key water storage, flood control, and hydroelectric facility.
Referenced by (16)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Oroville Dam complex
this entity surface form:
Oroville Facilities of the State Water Project
this entity surface form:
Oroville Dam Project
this entity surface form:
Oroville Dam emergency spillway
this entity surface form:
Oroville–Thermalito Complex