Garrison Dam
E475748
Garrison Dam is a large hydroelectric and flood-control dam on the Missouri River in North Dakota, forming Lake Sakakawea, one of the largest man-made reservoirs in the United States.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Garrison Dam canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T4528891 — 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: Garrison Dam Context triple: [Missouri River Basin, hasMajorDam, Garrison Dam]
-
A.
Gillespie Dam
Gillespie Dam is an early 20th-century concrete gravity dam on Arizona’s Gila River, historically used for irrigation and now noted as a local landmark and wildlife habitat area.
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B.
McClure Dam
McClure Dam is a hydroelectric dam on the Dead River in Michigan, forming McClure Basin and providing power and water management for the surrounding region.
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C.
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.
-
D.
J.C. Boyle Dam
J.C. Boyle Dam is a hydroelectric dam on the Klamath River in southern Oregon, known for power generation and its role in regional water and environmental management.
-
E.
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.
- 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: Garrison Dam Target entity description: Garrison Dam is a large hydroelectric and flood-control dam on the Missouri River in North Dakota, forming Lake Sakakawea, one of the largest man-made reservoirs in the United States.
-
A.
Gillespie Dam
Gillespie Dam is an early 20th-century concrete gravity dam on Arizona’s Gila River, historically used for irrigation and now noted as a local landmark and wildlife habitat area.
-
B.
McClure Dam
McClure Dam is a hydroelectric dam on the Dead River in Michigan, forming McClure Basin and providing power and water management for the surrounding region.
-
C.
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.
-
D.
J.C. Boyle Dam
J.C. Boyle Dam is a hydroelectric dam on the Klamath River in southern Oregon, known for power generation and its role in regional water and environmental management.
-
E.
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.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
flood control dam
ⓘ
hydroelectric dam ⓘ |
| connectedInfrastructure | Garrison Dam National Fish Hatchery NERFINISHED ⓘ |
| constructionCompleted | 1954 ⓘ |
| constructionStartDate | 1947 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| crosses | Missouri River NERFINISHED ⓘ |
| damType | earth-fill embankment dam ⓘ |
| energySource | hydropower ⓘ |
| floodControlRole | major flood control structure on the Missouri River ⓘ |
| formsReservoir | Lake Sakakawea NERFINISHED ⓘ |
| height | about 64 meters ⓘ |
| impact |
creation of Lake Sakakawea recreation areas
ⓘ
displacement of Native American communities ⓘ |
| installedCapacity | about 583 megawatts ⓘ |
| isAmong |
largest earth-fill dams in the world
ⓘ
largest reservoirs in the United States by volume ⓘ |
| length | about 3,444 meters ⓘ |
| locatedIn | North Dakota NERFINISHED ⓘ |
| locatedInCounty | McLean County, North Dakota NERFINISHED ⓘ |
| locatedNear | Garrison, North Dakota NERFINISHED ⓘ |
| locatedOnRiver | Missouri River NERFINISHED ⓘ |
| managesReservoir | Lake Sakakawea water levels ⓘ |
| namedAfter | nearby town of Garrison ⓘ |
| nearbyCity | Bismarck, North Dakota NERFINISHED ⓘ |
| numberOfTurbines | 5 ⓘ |
| openingDate | 1953 ⓘ |
| operator | United States Army Corps of Engineers NERFINISHED ⓘ |
| ownedBy | United States government ⓘ |
| partOf | Pick–Sloan Missouri Basin Program NERFINISHED ⓘ |
| purpose |
flood control
ⓘ
hydroelectric power generation ⓘ irrigation ⓘ navigation support ⓘ recreation ⓘ |
| region | north-central North Dakota ⓘ |
| regionServed | Upper Midwest NERFINISHED ⓘ |
| reservoirName | Lake Sakakawea NERFINISHED ⓘ |
| reservoirSurfaceArea | about 1,280 square kilometers ⓘ |
| reservoirTotalCapacity | about 29 cubic kilometers ⓘ |
| riverBasin | Missouri River Basin NERFINISHED ⓘ |
| spillwayType | gated overflow spillway ⓘ |
| supportsActivity |
boating on Lake Sakakawea
ⓘ
camping and tourism ⓘ sport fishing on Lake Sakakawea ⓘ |
| turbineType | Francis turbine ⓘ |
| watercourse | Missouri River NERFINISHED ⓘ |
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: Garrison Dam Description of subject: Garrison Dam is a large hydroelectric and flood-control dam on the Missouri River in North Dakota, forming Lake Sakakawea, one of the largest man-made reservoirs in the United States.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.