Lake Oahe
E203220
Lake Oahe is a large man-made reservoir on the Missouri River in the north-central United States, known for its extensive recreation opportunities and role in regional water storage and hydroelectric power.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Lake Oahe canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T989671 — 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: Lake Oahe Context triple: [Missouri River, passesThrough, Lake Oahe]
-
A.
Lake Sakakawea
Lake Sakakawea is a large reservoir in North Dakota formed by the Garrison Dam on the Missouri River, known for its extensive shoreline and recreational opportunities.
-
B.
Fort Peck Lake
Fort Peck Lake is a large man-made reservoir in northeastern Montana, created by Fort Peck Dam, known for its extensive shoreline, recreation opportunities, and role in Missouri River water management.
-
C.
Lake Roosevelt
Lake Roosevelt is a large reservoir on the Columbia River in Washington State, created by the Grand Coulee Dam and used for hydroelectric power, irrigation, recreation, and water storage.
-
D.
Whiskeytown Lake
Whiskeytown Lake is a large reservoir in Northern California known for its clear waters, outdoor recreation, and role in the Central Valley Project.
-
E.
Walker Lake
Walker Lake is a large natural desert lake in western Nevada known for its shrinking water levels and importance as a habitat for migratory birds and native fish.
- 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: Lake Oahe Target entity description: Lake Oahe is a large man-made reservoir on the Missouri River in the north-central United States, known for its extensive recreation opportunities and role in regional water storage and hydroelectric power.
-
A.
Lake Sakakawea
Lake Sakakawea is a large reservoir in North Dakota formed by the Garrison Dam on the Missouri River, known for its extensive shoreline and recreational opportunities.
-
B.
Fort Peck Lake
Fort Peck Lake is a large man-made reservoir in northeastern Montana, created by Fort Peck Dam, known for its extensive shoreline, recreation opportunities, and role in Missouri River water management.
-
C.
Lake Roosevelt
Lake Roosevelt is a large reservoir on the Columbia River in Washington State, created by the Grand Coulee Dam and used for hydroelectric power, irrigation, recreation, and water storage.
-
D.
Whiskeytown Lake
Whiskeytown Lake is a large reservoir in Northern California known for its clear waters, outdoor recreation, and role in the Central Valley Project.
-
E.
Walker Lake
Walker Lake is a large natural desert lake in western Nevada known for its shrinking water levels and importance as a habitat for migratory birds and native fish.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
artificial lake
ⓘ
body of water ⓘ reservoir ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| constructionBegan | 1950 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| createdBy | Oahe Dam ⓘ |
| crosses |
South Dakota–North Dakota border
ⓘ
surface form:
North Dakota–South Dakota border
|
| damCompleted | 1962 ⓘ |
| hasActivity |
boating
ⓘ
camping ⓘ fishing ⓘ hunting ⓘ ice fishing ⓘ sailing ⓘ swimming ⓘ water sports ⓘ |
| hasImpactOn |
regional ecosystems
ⓘ
tribal lands and communities ⓘ |
| hasShoreline | extensive shoreline ⓘ |
| inflow | Missouri River ⓘ |
| knownFor |
extensive recreation opportunities
ⓘ
hydroelectric power production ⓘ role in regional water storage ⓘ |
| locatedIn |
North Dakota
ⓘ
South Dakota ⓘ Standing Rock Indian Reservation vicinity ⓘ |
| locatedInRegion | north-central United States ⓘ |
| locatedOn | Missouri River ⓘ |
| namedAfter | Oahe Mission ⓘ |
| operator | U.S. Army Corps of Engineers ⓘ |
| outflow | Missouri River ⓘ |
| partOf |
Missouri River reservoir system
ⓘ
Pick-Sloan Missouri Basin Program ⓘ
surface form:
Pick–Sloan Missouri Basin Program
|
| purpose |
flood control
ⓘ
hydroelectric power generation ⓘ irrigation ⓘ recreation ⓘ water storage ⓘ |
| reservoirFilled | 1960s ⓘ |
| stateBorder |
North Dakota
ⓘ
South Dakota ⓘ |
| usedFor |
industrial water supply
ⓘ
municipal water supply ⓘ navigation support ⓘ |
| watercourse | Missouri River ⓘ |
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: Lake Oahe Description of subject: Lake Oahe is a large man-made reservoir on the Missouri River in the north-central United States, known for its extensive recreation opportunities and role in regional water storage and hydroelectric power.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Grand River (South Dakota)