Big Bend Dam
E478235
Big Bend Dam is a large hydroelectric and flood-control dam on the Missouri River in South Dakota, forming Lake Sharpe as part of the Pick–Sloan Missouri Basin Program.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Big Bend Dam canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T4528893 — 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: Big Bend Dam Context triple: [Missouri River Basin, hasMajorDam, Big Bend Dam]
-
A.
Longhorn Dam
Longhorn Dam is a concrete dam on the Colorado River in Austin, Texas, that impounds the river to form Lady Bird Lake and helps manage water levels and flow through the city.
-
B.
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.
-
C.
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.
-
D.
Eufaula Dam
Eufaula Dam is a major flood-control and hydroelectric dam on the Arkansas River in Oklahoma that forms Lake Eufaula, one of the largest reservoirs in the United States.
-
E.
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.
- 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: Big Bend Dam Target entity description: Big Bend Dam is a large hydroelectric and flood-control dam on the Missouri River in South Dakota, forming Lake Sharpe as part of the Pick–Sloan Missouri Basin Program.
-
A.
Longhorn Dam
Longhorn Dam is a concrete dam on the Colorado River in Austin, Texas, that impounds the river to form Lady Bird Lake and helps manage water levels and flow through the city.
-
B.
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.
-
C.
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.
-
D.
Eufaula Dam
Eufaula Dam is a major flood-control and hydroelectric dam on the Arkansas River in Oklahoma that forms Lake Eufaula, one of the largest reservoirs in the United States.
-
E.
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.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
flood control dam
ⓘ
gravity dam ⓘ hydroelectric dam ⓘ |
| benefits |
peak power supply
ⓘ
recreational opportunities on Lake Sharpe ⓘ reduction of downstream flood risk ⓘ |
| constructionCost | approximately $107 million ⓘ |
| constructionStartDate | 1959 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| downstreamFrom | Oahe Dam NERFINISHED ⓘ |
| energySource | hydropower ⓘ |
| formsReservoir | Lake Sharpe NERFINISHED ⓘ |
| hasSpillway | yes ⓘ |
| height | 95 feet ⓘ |
| installedCapacity | 494 MW ⓘ |
| length | 10570 feet ⓘ |
| locatedIn | South Dakota NERFINISHED ⓘ |
| locatedInCounty |
Buffalo County, South Dakota
NERFINISHED
ⓘ
Lyman County, South Dakota NERFINISHED ⓘ |
| locatedNear | Fort Thompson, South Dakota NERFINISHED ⓘ |
| locatedOnRiver | Missouri River NERFINISHED ⓘ |
| managedBy | U.S. Army Corps of Engineers Omaha District NERFINISHED ⓘ |
| namedAfter | Big Bend of the Missouri River NERFINISHED ⓘ |
| nearReservation |
Crow Creek Indian Reservation
NERFINISHED
ⓘ
Lower Brule Indian Reservation NERFINISHED ⓘ |
| numberOfTurbines | 8 ⓘ |
| openingDate | 1964 ⓘ |
| operator | U.S. Army Corps of Engineers NERFINISHED ⓘ |
| partOf |
Pick–Sloan Missouri Basin Program
NERFINISHED
ⓘ
main-stem Missouri River dam system ⓘ |
| purpose |
flood control
ⓘ
hydroelectric power generation ⓘ irrigation support ⓘ navigation support ⓘ recreation ⓘ |
| region | Great Plains NERFINISHED ⓘ |
| reservoirName | Lake Sharpe NERFINISHED ⓘ |
| reservoirSurfaceArea | 56000 acres ⓘ |
| reservoirTotalCapacity | 1860000 acre-feet ⓘ |
| riverBasin | Missouri River Basin NERFINISHED ⓘ |
| spillwayType | gated overflow spillway ⓘ |
| turbineType | Francis turbine ⓘ |
| upstreamFrom | Fort Randall Dam 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: Big Bend Dam Description of subject: Big Bend Dam is a large hydroelectric and flood-control dam on the Missouri River in South Dakota, forming Lake Sharpe as part of the Pick–Sloan Missouri Basin Program.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.