Lake Roosevelt
E159274
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Lake Roosevelt canonical | 4 |
| Lake Roosevelt National Recreation Area | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T1258924 — 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 Roosevelt Context triple: [Bureau of Reclamation, hasReservoirs, Lake Roosevelt]
-
A.
Lake Powell
Lake Powell is a large, man-made reservoir on the Colorado River known for its striking red-rock canyon scenery and recreational boating in the American Southwest.
-
B.
Lake Havasu
Lake Havasu is a large reservoir on the Colorado River along the Arizona–California border, popular for boating, fishing, and the relocated London Bridge tourist attraction.
-
C.
Lake Mead
Lake Mead is a large man-made reservoir on the Colorado River in the southwestern United States, known for supplying water and hydroelectric power to millions of people in the region.
-
D.
Lake Mohave
Lake Mohave is a large reservoir on the Colorado River along the Arizona–Nevada border, popular for boating, fishing, and other water recreation within the Lake Mead National Recreation Area.
-
E.
Butte Lake
Butte Lake is a scenic high-elevation lake in northern California known for its volcanic landscape, clear waters, and access to hiking and camping within Lassen Volcanic National Park.
- 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 Roosevelt Target entity description: 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.
-
A.
Lake Powell
Lake Powell is a large, man-made reservoir on the Colorado River known for its striking red-rock canyon scenery and recreational boating in the American Southwest.
-
B.
Lake Havasu
Lake Havasu is a large reservoir on the Colorado River along the Arizona–California border, popular for boating, fishing, and the relocated London Bridge tourist attraction.
-
C.
Lake Mead
Lake Mead is a large man-made reservoir on the Colorado River in the southwestern United States, known for supplying water and hydroelectric power to millions of people in the region.
-
D.
Lake Mohave
Lake Mohave is a large reservoir on the Colorado River along the Arizona–Nevada border, popular for boating, fishing, and other water recreation within the Lake Mead National Recreation Area.
-
E.
Butte Lake
Butte Lake is a scenic high-elevation lake in northern California known for its volcanic landscape, clear waters, and access to hiking and camping within Lassen Volcanic National Park.
- F. None of above. chosen
Statements (34)
| Predicate | Object |
|---|---|
| instanceOf |
artificial lake
ⓘ
body of water ⓘ reservoir ⓘ |
| alsoKnownAs | Franklin D. Roosevelt Lake NERFINISHED ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| country |
United States of America
ⓘ
surface form:
United States
|
| createdBy | Grand Coulee Dam ⓘ |
| formedBy | impoundment of the Columbia River ⓘ |
| hasActivity |
boating
ⓘ
camping ⓘ fishing ⓘ swimming ⓘ wildlife viewing ⓘ |
| hasFunction |
flood control
ⓘ
navigation support ⓘ water supply ⓘ |
| isManagedFor |
irrigation deliveries
ⓘ
power generation ⓘ recreational use ⓘ |
| isReservoirOf | Columbia River ⓘ |
| isUpstreamOf | Columbia River reaches below Grand Coulee Dam ⓘ |
| locatedIn |
United States of America
ⓘ
surface form:
United States
Washington ⓘ
surface form:
Washington State
|
| locatedOnRiver | Columbia River ⓘ |
| namedAfter |
President Franklin D. Roosevelt
ⓘ
surface form:
Franklin D. Roosevelt
|
| partOf |
Columbia River Basin
ⓘ
surface form:
Columbia River system
|
| region | Pacific Northwest ⓘ |
| reservoirForDam | Grand Coulee Dam ⓘ |
| state | Washington ⓘ |
| use |
hydroelectric power generation
ⓘ
irrigation ⓘ recreation ⓘ water storage ⓘ |
| watercourse | Columbia 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 Roosevelt Description of subject: 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.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Lake Roosevelt National Recreation Area
this entity surface form:
Lake Roosevelt National Recreation Area
this entity surface form:
Lake Roosevelt National Recreation Area