Franklin D. Roosevelt Lake
E67739
Franklin D. Roosevelt Lake is a large man-made reservoir on the Columbia River in Washington State, created by the construction of Grand Coulee Dam and used for hydroelectric power, irrigation, and recreation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Franklin D. Roosevelt Lake canonical | 7 |
How this entity was disambiguated
This entity first appeared as the object of triple T469811 — 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: Franklin D. Roosevelt Lake Context triple: [Grand Coulee Dam, reservoir, Franklin D. Roosevelt Lake]
-
A.
Osceola Lake
Osceola Lake is a small hamlet within the Town of Yorktown in Westchester County, New York.
-
B.
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.
-
C.
Woods Lake
Woods Lake is a scenic alpine lake in the Sierra Nevada of California, popular for camping, fishing, and hiking in the Carson Pass area.
-
D.
Longview Lake
Longview Lake is a large recreational reservoir in the Kansas City metropolitan area known for boating, fishing, and surrounding park facilities.
-
E.
Muscoot Reservoir
Muscoot Reservoir is a man-made lake in Westchester County, New York, that serves as a key component of New York City’s Croton water supply 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: Franklin D. Roosevelt Lake Target entity description: Franklin D. Roosevelt Lake is a large man-made reservoir on the Columbia River in Washington State, created by the construction of Grand Coulee Dam and used for hydroelectric power, irrigation, and recreation.
-
A.
Osceola Lake
Osceola Lake is a small hamlet within the Town of Yorktown in Westchester County, New York.
-
B.
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.
-
C.
Woods Lake
Woods Lake is a scenic alpine lake in the Sierra Nevada of California, popular for camping, fishing, and hiking in the Carson Pass area.
-
D.
Longview Lake
Longview Lake is a large recreational reservoir in the Kansas City metropolitan area known for boating, fishing, and surrounding park facilities.
-
E.
Muscoot Reservoir
Muscoot Reservoir is a man-made lake in Westchester County, New York, that serves as a key component of New York City’s Croton water supply system.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
artificial lake
ⓘ
body of water ⓘ reservoir ⓘ |
| alsoKnownAs | Lake Roosevelt ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| country |
United States of America
ⓘ
surface form:
United States
|
| createdBy | Grand Coulee Dam ⓘ |
| createdForProject | Columbia Basin Project ⓘ |
| creationEndYear | 1942 ⓘ |
| creationStartYear | 1933 ⓘ |
| elevation | approximately 1,290 feet above sea level ⓘ |
| extendsFrom | Grand Coulee Dam ⓘ |
| extendsTo | Canadian border ⓘ |
| fishSpecies |
smallmouth bass
ⓘ
trout ⓘ walleye ⓘ |
| formedBy | impoundment of the Columbia River ⓘ |
| hasDam | Grand Coulee Dam ⓘ |
| length | about 151 miles ⓘ |
| locatedIn |
Washington
ⓘ
surface form:
Washington State
|
| locatedInCounty |
Ferry County, Washington
ⓘ
Grant County, Washington ⓘ Lincoln County, Washington ⓘ Okanogan County, Washington ⓘ Stevens County, Washington ⓘ |
| locatedInRegion |
eastern Washington
ⓘ
surface form:
Eastern Washington
|
| locatedOnRiver | Columbia River ⓘ |
| locatedWithin |
Lake Roosevelt
ⓘ
surface form:
Lake Roosevelt National Recreation Area
|
| managingAgency |
National Park Service
ⓘ
surface form:
U.S. National Park Service
|
| name | Franklin D. Roosevelt Lake self-link ⓘ |
| namedAfter |
President Franklin D. Roosevelt
ⓘ
surface form:
Franklin D. Roosevelt
|
| operator |
Bureau of Reclamation
ⓘ
surface form:
U.S. Bureau of Reclamation
|
| outflow | Columbia River ⓘ |
| partOf |
Columbia River
ⓘ
surface form:
Columbia River system
|
| primaryUse |
hydroelectric power
ⓘ
irrigation ⓘ recreation ⓘ |
| purpose |
generate hydroelectric power at Grand Coulee Dam
ⓘ
support Columbia Basin irrigation ⓘ |
| recreationalActivity |
boating
ⓘ
camping ⓘ fishing ⓘ swimming ⓘ |
| reservoirType | storage reservoir ⓘ |
| surfaceArea | about 125 square miles ⓘ |
| usedFor |
flood control
ⓘ
navigation ⓘ |
| waterSource | 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: Franklin D. Roosevelt Lake Description of subject: Franklin D. Roosevelt Lake is a large man-made reservoir on the Columbia River in Washington State, created by the construction of Grand Coulee Dam and used for hydroelectric power, irrigation, and recreation.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.