Glines Canyon Dam
E791129
Glines Canyon Dam was a concrete arch dam on Washington State’s Elwha River, notable for its role in hydroelectric power generation and its later removal as part of one of the largest river restoration projects in U.S. history.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Glines Canyon Dam canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8958874 — 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: Glines Canyon Dam Context triple: [Elwha River, hadDam, Glines Canyon Dam]
-
A.
Dworshak Dam
Dworshak Dam is a large concrete gravity dam on the North Fork Clearwater River in Idaho, primarily used for hydroelectric power generation, flood control, and recreation.
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B.
Red Rock Dam
Red Rock Dam is a large flood-control and hydroelectric dam on the Des Moines River in central Iowa, forming Lake Red Rock as the state’s largest reservoir.
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C.
Jemez Canyon Dam
Jemez Canyon Dam is a flood-control and water-management structure on the Jemez River in New Mexico, operated by the U.S. Army Corps of Engineers.
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D.
O'Shaughnessy Dam
O'Shaughnessy Dam is a concrete arch-gravity dam in Yosemite National Park that creates the Hetch Hetchy Reservoir, supplying water and hydroelectric power to the San Francisco Bay Area.
-
E.
Wanapum Dam
Wanapum Dam is a hydroelectric dam on the Columbia River in Washington State that generates power, supports irrigation, and helps regulate river flow.
- 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: Glines Canyon Dam Target entity description: Glines Canyon Dam was a concrete arch dam on Washington State’s Elwha River, notable for its role in hydroelectric power generation and its later removal as part of one of the largest river restoration projects in U.S. history.
-
A.
Dworshak Dam
Dworshak Dam is a large concrete gravity dam on the North Fork Clearwater River in Idaho, primarily used for hydroelectric power generation, flood control, and recreation.
-
B.
Red Rock Dam
Red Rock Dam is a large flood-control and hydroelectric dam on the Des Moines River in central Iowa, forming Lake Red Rock as the state’s largest reservoir.
-
C.
Jemez Canyon Dam
Jemez Canyon Dam is a flood-control and water-management structure on the Jemez River in New Mexico, operated by the U.S. Army Corps of Engineers.
-
D.
O'Shaughnessy Dam
O'Shaughnessy Dam is a concrete arch-gravity dam in Yosemite National Park that creates the Hetch Hetchy Reservoir, supplying water and hydroelectric power to the San Francisco Bay Area.
-
E.
Wanapum Dam
Wanapum Dam is a hydroelectric dam on the Columbia River in Washington State that generates power, supports irrigation, and helps regulate river flow.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
concrete arch dam
ⓘ
hydroelectric dam ⓘ |
| acquiredByNPSDate | 1992 ⓘ |
| archType | single-arch concrete structure ⓘ |
| associatedDam | Elwha Dam NERFINISHED ⓘ |
| completionDate | 1927 ⓘ |
| constructionStartDate | 1925 ⓘ |
| continent | North America ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| demolitionEndDate | 2014 ⓘ |
| demolitionStartDate | 2011 ⓘ |
| designedBy | Northwestern Power and Light Company engineers NERFINISHED ⓘ |
| fishPassage | no fish ladder ⓘ |
| height |
210 feet
ⓘ
64 meters ⓘ |
| historicUse | power supply for timber and paper industries ⓘ |
| impact |
altered riverine and coastal ecosystems
ⓘ
blocked salmon migration on the Elwha River ⓘ reduced sediment transport downstream ⓘ |
| installedCapacity | 13.3 megawatts ⓘ |
| legislativeBasisForRemoval | Elwha River Ecosystem and Fisheries Restoration Act of 1992 NERFINISHED ⓘ |
| length |
210 feet
ⓘ
64 meters ⓘ |
| locatedIn | Clallam County, Washington NERFINISHED ⓘ |
| locatedInProtectedArea | Olympic National Park NERFINISHED ⓘ |
| locatedOnRiver | Elwha River NERFINISHED ⓘ |
| material | concrete ⓘ |
| nearCity | Port Angeles, Washington NERFINISHED ⓘ |
| numberOfTurbines | 2 ⓘ |
| openingDate | 1927 ⓘ |
| operatorBeforeRemoval | U.S. National Park Service NERFINISHED ⓘ |
| owner | U.S. National Park Service NERFINISHED ⓘ |
| partOfProject | Elwha River Restoration Project NERFINISHED ⓘ |
| postRemovalFeature | Glines Canyon overlook NERFINISHED ⓘ |
| previousOwner |
Crown Zellerbach Corporation
NERFINISHED
ⓘ
Northwestern Power and Light Company NERFINISHED ⓘ Washington Water Power Company NERFINISHED ⓘ |
| primaryPurpose | hydroelectric power generation ⓘ |
| removalMethod | phased deconstruction ⓘ |
| removalSignificance |
key component of Elwha River ecosystem restoration
ⓘ
one of the largest dam removal projects in U.S. history ⓘ |
| reservoirName | Lake Mills NERFINISHED ⓘ |
| reservoirSurfaceElevation | 607 feet ⓘ |
| riverRestored | Elwha River free-flowing condition ⓘ |
| secondaryPurpose | industrial power supply ⓘ |
| spillwayType | overflow spillway ⓘ |
| state | Washington ⓘ |
| status | removed ⓘ |
| turbineType | Francis turbine ⓘ |
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: Glines Canyon Dam Description of subject: Glines Canyon Dam was a concrete arch dam on Washington State’s Elwha River, notable for its role in hydroelectric power generation and its later removal as part of one of the largest river restoration projects in U.S. history.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.