Elwha River
E213547
The Elwha River is a major river on Washington State’s Olympic Peninsula, renowned for the historic removal of its dams and the resulting large-scale salmon and ecosystem restoration.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Elwha River canonical | 7 |
| Elwha River Restoration Project | 1 |
| Elwha River valley | 1 |
| Elwha Valley | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T947359 — 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: Elwha River Context triple: [Clallam County, Washington, containsPlace, Elwha River]
-
A.
Chetco River
The Chetco River is a scenic coastal river in southwestern Oregon known for its clear waters, salmon and steelhead runs, and recreational opportunities such as fishing, boating, and hiking along its forested banks.
-
B.
Lewis River
The Lewis River is a tributary of the Columbia River in southwestern Washington State, known for its hydroelectric dams, scenic gorges, and popular fishing and recreation areas.
-
C.
Green River
Green River is a river in western Washington State that flows through the Seattle metropolitan area and is a key tributary of the Duwamish River.
-
D.
Okanogan River
The Okanogan River is a north–south flowing river in British Columbia and Washington that drains the Okanagan region into the Columbia River.
-
E.
Yaquina River
The Yaquina River is a coastal river in western Oregon that flows through forested valleys before emptying into the Pacific Ocean at Yaquina Bay near Newport.
- 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: Elwha River Target entity description: The Elwha River is a major river on Washington State’s Olympic Peninsula, renowned for the historic removal of its dams and the resulting large-scale salmon and ecosystem restoration.
-
A.
Chetco River
The Chetco River is a scenic coastal river in southwestern Oregon known for its clear waters, salmon and steelhead runs, and recreational opportunities such as fishing, boating, and hiking along its forested banks.
-
B.
Lewis River
The Lewis River is a tributary of the Columbia River in southwestern Washington State, known for its hydroelectric dams, scenic gorges, and popular fishing and recreation areas.
-
C.
Green River
Green River is a river in western Washington State that flows through the Seattle metropolitan area and is a key tributary of the Duwamish River.
-
D.
Okanogan River
The Okanogan River is a north–south flowing river in British Columbia and Washington that drains the Okanagan region into the Columbia River.
-
E.
Yaquina River
The Yaquina River is a coastal river in western Oregon that flows through forested valleys before emptying into the Pacific Ocean at Yaquina Bay near Newport.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| continent | North America ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| damRemovalCompletionDate | 2014 ⓘ |
| damRemovalProject |
Elwha River
self-linksurface differs
ⓘ
surface form:
Elwha River Restoration Project
|
| damRemovalSignificance | one of the largest dam removal projects in U.S. history ⓘ |
| damRemovalStartDate | 2011 ⓘ |
| ecosystemType | temperate rainforest river ⓘ |
| flowsNear |
Port Angeles
ⓘ
surface form:
Port Angeles, Washington
|
| flowsThrough |
Elwha Valley
ⓘ
Olympic National Park ⓘ |
| hadDam |
Elwha Dam
ⓘ
Glines Canyon Dam ⓘ |
| hasBasinSize |
approximately 322 square miles
ⓘ
approximately 833 square kilometers ⓘ |
| hasBridge | Elwha River Bridge (U.S. Highway 101) ⓘ |
| hasLength |
approximately 45 miles
ⓘ
approximately 72 kilometers ⓘ |
| hasRecreation |
fishing
ⓘ
hiking ⓘ rafting ⓘ |
| historicallyImportantFor | Pacific salmon runs ⓘ |
| knownFor |
ecosystem restoration
ⓘ
large-scale dam removal ⓘ salmon restoration ⓘ |
| locatedIn |
Clallam County, Washington
NERFINISHED
ⓘ
Olympic Peninsula ⓘ Washington ⓘ
surface form:
Washington State
|
| managingAgency | National Park Service ⓘ |
| mouthLocation |
Pacific Ocean basin
ⓘ
Juan de Fuca Strait ⓘ
surface form:
Strait of Juan de Fuca
|
| partOf | Olympic National Park river system ⓘ |
| restorationCost | over 300 million US dollars ⓘ |
| restorationGoal |
recover native salmon populations
ⓘ
reestablish fish passage ⓘ restore estuary and nearshore habitats ⓘ restore natural sediment transport ⓘ |
| sourceLocation |
Olympic Mountains
ⓘ
Olympic National Park ⓘ |
| supportsSpecies |
Bull trout
ⓘ
Chinook salmon ⓘ Chum salmon ⓘ Coho salmon ⓘ Pink salmon ⓘ Sockeye salmon ⓘ Steelhead trout ⓘ |
| tribalTerritoryOf |
Lower Elwha Klallam Tribe reservation
ⓘ
surface form:
Lower Elwha Klallam Tribe
|
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: Elwha River Description of subject: The Elwha River is a major river on Washington State’s Olympic Peninsula, renowned for the historic removal of its dams and the resulting large-scale salmon and ecosystem restoration.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Elwha River valley
subject surface form:
MV Elwha
subject surface form:
MV Elwha
this entity surface form:
Elwha Valley
this entity surface form:
Elwha River Restoration Project