Mattole River
E629164
The Mattole River is a remote, free-flowing river in Northern California’s Lost Coast region, known for its rugged watershed, salmon and steelhead habitat, and largely undeveloped surroundings.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mattole River canonical | 6 |
How this entity was disambiguated
This entity first appeared as the object of triple T6560471 — 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: Mattole River Context triple: [Petrolia, California, locatedOnRiver, Mattole River]
-
A.
Cle Elum River
The Cle Elum River is a tributary of the Yakima River in central Washington State, known for flowing through forested mountain terrain and supporting irrigation, recreation, and local ecosystems.
-
B.
Queets River
The Queets River is a remote, glacially fed river in Washington State that flows through old-growth rainforest in Olympic National Park before emptying into the Pacific Ocean.
-
C.
Mokelumne River
The Mokelumne River is a major river in the Sierra Nevada of California, known for its scenic canyons, hydroelectric projects, and role as a vital water source for agriculture and urban areas.
-
D.
Quillayute River
The Quillayute River is a short river on Washington State’s Olympic Peninsula formed by the confluence of several tributaries and flowing into the Pacific Ocean near the town of La Push.
-
E.
Newaukum River
The Newaukum River is a tributary of the Chehalis River in southwestern Washington State, known for its salmon and steelhead runs and its role in the local watershed and floodplain of Lewis County.
- 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: Mattole River Target entity description: The Mattole River is a remote, free-flowing river in Northern California’s Lost Coast region, known for its rugged watershed, salmon and steelhead habitat, and largely undeveloped surroundings.
-
A.
Cle Elum River
The Cle Elum River is a tributary of the Yakima River in central Washington State, known for flowing through forested mountain terrain and supporting irrigation, recreation, and local ecosystems.
-
B.
Queets River
The Queets River is a remote, glacially fed river in Washington State that flows through old-growth rainforest in Olympic National Park before emptying into the Pacific Ocean.
-
C.
Mokelumne River
The Mokelumne River is a major river in the Sierra Nevada of California, known for its scenic canyons, hydroelectric projects, and role as a vital water source for agriculture and urban areas.
-
D.
Quillayute River
The Quillayute River is a short river on Washington State’s Olympic Peninsula formed by the confluence of several tributaries and flowing into the Pacific Ocean near the town of La Push.
-
E.
Newaukum River
The Newaukum River is a tributary of the Chehalis River in southwestern Washington State, known for its salmon and steelhead runs and its role in the local watershed and floodplain of Lewis County.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
geographical feature
ⓘ
river ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| culturalRegionOf | Mattole people NERFINISHED ⓘ |
| drainageBasin | Mattole River watershed NERFINISHED ⓘ |
| flowsInto | Pacific Ocean NERFINISHED ⓘ |
| flowsNear |
Honeydew, California
NERFINISHED
ⓘ
Petrolia, California NERFINISHED ⓘ |
| flowsThrough | King Range National Conservation Area NERFINISHED ⓘ |
| freeFlowing | true ⓘ |
| hasConservationGroup |
Mattole Restoration Council
NERFINISHED
ⓘ
Mattole Salmon Group NERFINISHED ⓘ |
| hasDam | false ⓘ |
| hasEcosystemType |
coastal temperate rainforest
ⓘ
riparian habitat ⓘ |
| hasTributary |
Bear Creek (Mattole River tributary)
NERFINISHED
ⓘ
East Fork Mattole River NERFINISHED ⓘ Honeydew Creek NERFINISHED ⓘ North Fork Mattole River NERFINISHED ⓘ |
| knownFor |
largely undeveloped surroundings
ⓘ
rugged watershed ⓘ salmon habitat ⓘ steelhead habitat ⓘ |
| length | approximately 62 miles ⓘ |
| locatedIn |
Humboldt County, California
NERFINISHED
ⓘ
Lost Coast NERFINISHED ⓘ Northern California ⓘ |
| mouthLocatedIn |
King Range National Conservation Area
NERFINISHED
ⓘ
Mattole Beach NERFINISHED ⓘ Pacific Ocean NERFINISHED ⓘ |
| namedAfter | Mattole people NERFINISHED ⓘ |
| nearbyProtectedArea |
King Range National Conservation Area
NERFINISHED
ⓘ
Sinkyone Wilderness State Park NERFINISHED ⓘ |
| partOf | Mattole River watershed ⓘ |
| recreation |
camping
ⓘ
fishing ⓘ hiking ⓘ |
| region | North Coast of California NERFINISHED ⓘ |
| sourceLocatedIn |
Cooskie Mountain area
NERFINISHED
ⓘ
King Range NERFINISHED ⓘ |
| state |
California, United States
ⓘ
surface form:
California
|
| supportsSpecies |
Chinook salmon
NERFINISHED
ⓘ
Pacific lamprey ⓘ coho salmon ⓘ steelhead trout ⓘ |
| threat |
climate change
ⓘ
logging impacts ⓘ sedimentation ⓘ |
| watershedArea | approximately 304 square miles ⓘ |
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: Mattole River Description of subject: The Mattole River is a remote, free-flowing river in Northern California’s Lost Coast region, known for its rugged watershed, salmon and steelhead habitat, and largely undeveloped surroundings.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.