Columbia River Bar
E460946
The Columbia River Bar is a notoriously dangerous sandbar and shipping passage at the mouth of the Columbia River, often called the "Graveyard of the Pacific" due to its treacherous waves and frequent shipwrecks.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Columbia River Bar canonical | 6 |
| Columbia River Bar maritime history | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4674769 — 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: Columbia River Bar Context triple: [Columbia River estuary, hasFeature, Columbia River Bar]
-
A.
Second Narrows
Second Narrows is a geographic strait or narrow water passage, known in Spanish as "Segunda Angostura," typically referring to a constricted section of a larger waterway.
-
B.
Cape Disappointment
Cape Disappointment is a rugged headland on the Pacific coast of Washington State, known for its historic lighthouse, treacherous waters at the mouth of the Columbia River, and role in the Lewis and Clark Expedition.
-
C.
Tongass Narrows
Tongass Narrows is a coastal waterway in southeastern Alaska known for its busy marine traffic, seaplane operations, and role as the main channel adjacent to the city of Ketchikan.
-
D.
Celilo Falls
Celilo Falls was a major Native American fishing and trading site on the Columbia River in the Pacific Northwest, renowned for its powerful rapids and rich salmon runs before being inundated by dam construction.
-
E.
Mather Gorge
Mather Gorge is a dramatic, narrow canyon on the Potomac River known for its steep cliffs, powerful rapids, and scenic views near Great Falls.
- 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: Columbia River Bar Target entity description: The Columbia River Bar is a notoriously dangerous sandbar and shipping passage at the mouth of the Columbia River, often called the "Graveyard of the Pacific" due to its treacherous waves and frequent shipwrecks.
-
A.
Second Narrows
Second Narrows is a geographic strait or narrow water passage, known in Spanish as "Segunda Angostura," typically referring to a constricted section of a larger waterway.
-
B.
Cape Disappointment
Cape Disappointment is a rugged headland on the Pacific coast of Washington State, known for its historic lighthouse, treacherous waters at the mouth of the Columbia River, and role in the Lewis and Clark Expedition.
-
C.
Tongass Narrows
Tongass Narrows is a coastal waterway in southeastern Alaska known for its busy marine traffic, seaplane operations, and role as the main channel adjacent to the city of Ketchikan.
-
D.
Celilo Falls
Celilo Falls was a major Native American fishing and trading site on the Columbia River in the Pacific Northwest, renowned for its powerful rapids and rich salmon runs before being inundated by dam construction.
-
E.
Mather Gorge
Mather Gorge is a dramatic, narrow canyon on the Potomac River known for its steep cliffs, powerful rapids, and scenic views near Great Falls.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
hazardous waterway
ⓘ
sandbar ⓘ shipping passage ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| hasCause |
interaction of river outflow and ocean swells
ⓘ
shifting sediment at river mouth ⓘ winter storms in the North Pacific ⓘ |
| hasFacility | Coast Guard Station Cape Disappointment ⓘ |
| hasHistory |
long record of shipwrecks
ⓘ
numerous 19th-century maritime disasters ⓘ ongoing dredging to maintain shipping channel ⓘ |
| hasRisk |
capsizing
ⓘ
loss of life ⓘ ship grounding ⓘ |
| hazardType |
bar crossing
ⓘ
maritime navigation hazard ⓘ |
| knownFor |
dangerous crossing for ships
ⓘ
frequent shipwrecks ⓘ rapidly changing sea conditions ⓘ shallow shifting sandbars ⓘ strong currents ⓘ treacherous waves ⓘ |
| locatedIn |
Pacific Ocean
ⓘ
border between Oregon and Washington ⓘ mouth of the Columbia River ⓘ |
| monitoredBy | United States Coast Guard ⓘ |
| navigationAid |
buoy system
ⓘ
lighthouses near the river mouth ⓘ |
| near |
Astoria, Oregon
ⓘ
Cape Disappointment ⓘ Clatsop Spit ⓘ Ilwaco, Washington ⓘ |
| nickname | Graveyard of the Pacific ⓘ |
| partOf |
Columbia River
ⓘ
Pacific Northwest ⓘ |
| region | Pacific Northwest coast of the United States ⓘ |
| regulatedBy | United States Coast Guard navigation rules ⓘ |
| requires | specialized bar pilots for large vessels ⓘ |
| safetyMeasure |
bar closure during extreme conditions
ⓘ
mandatory pilotage for many large vessels ⓘ |
| servedBy | Columbia River Bar Pilots ⓘ |
| usedBy |
commercial shipping
ⓘ
fishing vessels ⓘ recreational boats ⓘ |
| weatherInfluence |
North Pacific storms
ⓘ
river discharge levels ⓘ tidal cycles ⓘ |
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: Columbia River Bar Description of subject: The Columbia River Bar is a notoriously dangerous sandbar and shipping passage at the mouth of the Columbia River, often called the "Graveyard of the Pacific" due to its treacherous waves and frequent shipwrecks.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Columbia River Bar