Grand Coulee Dam
E8529
Grand Coulee Dam is a massive concrete gravity dam on the Columbia River in Washington State, renowned as one of the largest power-producing facilities in the United States and a landmark of New Deal–era infrastructure.
All labels observed (11)
How this entity was disambiguated
This entity first appeared as the object of triple T48259 — 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: Grand Coulee Dam Context triple: [Public Works Administration, notableProject, Grand Coulee Dam]
-
A.
Hoover Dam
Hoover Dam is a massive concrete arch-gravity dam on the Colorado River, renowned as a landmark feat of 20th-century American engineering and a major source of hydroelectric power and water management in the Southwest.
-
B.
Nevada Fall
Nevada Fall is a prominent and picturesque waterfall on the Merced River in Yosemite National Park, known for its powerful drop and dramatic granite surroundings.
-
C.
Vernal Fall
Vernal Fall is a prominent and picturesque waterfall on the Merced River in Yosemite National Park, renowned for its powerful flow and popular hiking access via the Mist Trail.
-
D.
Erie Canal
The Erie Canal is a historic man-made waterway in New York State that opened in 1825, linking the Great Lakes to the Atlantic Ocean and transforming U.S. commerce and westward expansion.
-
E.
Lake Tahoe
Lake Tahoe is a large, deep, and famously clear freshwater lake in the Sierra Nevada mountains, straddling the border of California and Nevada and serving as a major destination for outdoor recreation and tourism.
- 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: Grand Coulee Dam Target entity description: Grand Coulee Dam is a massive concrete gravity dam on the Columbia River in Washington State, renowned as one of the largest power-producing facilities in the United States and a landmark of New Deal–era infrastructure.
-
A.
Hoover Dam
Hoover Dam is a massive concrete arch-gravity dam on the Colorado River, renowned as a landmark feat of 20th-century American engineering and a major source of hydroelectric power and water management in the Southwest.
-
B.
Nevada Fall
Nevada Fall is a prominent and picturesque waterfall on the Merced River in Yosemite National Park, known for its powerful drop and dramatic granite surroundings.
-
C.
Vernal Fall
Vernal Fall is a prominent and picturesque waterfall on the Merced River in Yosemite National Park, renowned for its powerful flow and popular hiking access via the Mist Trail.
-
D.
Erie Canal
The Erie Canal is a historic man-made waterway in New York State that opened in 1825, linking the Great Lakes to the Atlantic Ocean and transforming U.S. commerce and westward expansion.
-
E.
Lake Tahoe
Lake Tahoe is a large, deep, and famously clear freshwater lake in the Sierra Nevada mountains, straddling the border of California and Nevada and serving as a major destination for outdoor recreation and tourism.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
New Deal public works project
ⓘ
concrete gravity dam ⓘ hydroelectric power station ⓘ |
| builder |
Consolidated Builders, Inc.
ⓘ
MWAK Company ⓘ |
| completed | 1942 ⓘ |
| constructionBegan |
1933
ⓘ
July 1933 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| county | Grant County, Washington ⓘ |
| creates | Franklin D. Roosevelt Lake ⓘ |
| crosses | Columbia River ⓘ |
| designedBy |
Bureau of Reclamation
ⓘ
surface form:
U.S. Bureau of Reclamation
|
| governingLaw |
Columbia Basin Project
ⓘ
surface form:
Columbia Basin Project Act
|
| hasPart |
Left Powerhouse
ⓘ
Right Powerhouse ⓘ Third Powerhouse ⓘ |
| hasSpillway | yes ⓘ |
| height |
about 168 meters
ⓘ
about 550 feet ⓘ |
| heritageStatus | listed on the National Register of Historic Places ⓘ |
| historicalEra |
New Deal
ⓘ
surface form:
New Deal era
|
| influencedBy | Tennessee Valley Authority model ⓘ |
| length |
about 1,592 meters
ⓘ
about 5,223 feet ⓘ |
| locatedIn |
United States of America
ⓘ
surface form:
United States
Washington ⓘ
surface form:
Washington State
|
| locatedOnRiver | Columbia River ⓘ |
| namedAfter |
Grand Coulee, Washington
ⓘ
surface form:
Grand Coulee
|
| nearestCity |
Electric City, Washington
ⓘ
Grand Coulee, Washington ⓘ |
| notableFor |
being one of the largest power-producing facilities in the United States
ⓘ
role in World War II industrial power supply ⓘ |
| NRHPListingYear | 1974 ⓘ |
| numberOfPowerhouses | 3 ⓘ |
| opened | 1941 ⓘ |
| operator |
Bureau of Reclamation
ⓘ
surface form:
U.S. Bureau of Reclamation
|
| ownedBy |
Bureau of Reclamation
ⓘ
surface form:
United States Bureau of Reclamation
|
| partOf |
Columbia Basin Project
ⓘ
United States federal power system ⓘ |
| purpose |
flood control
ⓘ
hydroelectric power generation ⓘ irrigation ⓘ |
| reservoir | Franklin D. Roosevelt Lake ⓘ |
| state | Washington ⓘ |
| type | concrete gravity dam ⓘ |
| usedFor |
supplying electricity to the Pacific Northwest
ⓘ
supplying irrigation water to the Columbia Basin ⓘ |
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: Grand Coulee Dam Description of subject: Grand Coulee Dam is a massive concrete gravity dam on the Columbia River in Washington State, renowned as one of the largest power-producing facilities in the United States and a landmark of New Deal–era infrastructure.
Referenced by (54)
Full triples — surface form annotated when it differs from this entity's canonical label.