Dismal Swamp Canal
E294903
The Dismal Swamp Canal is one of the oldest continually operating man-made canals in the United States, historically used for transportation through the Great Dismal Swamp between Virginia and North Carolina.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Dismal Swamp Canal canonical | 7 |
| Albemarle and Chesapeake Canal | 1 |
| Dismal Swamp Canal system | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2751692 — 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: Dismal Swamp Canal Context triple: [Great Dismal Swamp, borderedBy, Dismal Swamp Canal]
-
A.
Lewes and Rehoboth Canal
The Lewes and Rehoboth Canal is a man-made waterway in Sussex County, Delaware, that connects the Delaware Bay to Rehoboth Bay and forms part of the Intracoastal Waterway.
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B.
Delaware and Raritan Canal
The Delaware and Raritan Canal is a historic 19th-century waterway in central New Jersey that once served as a major transportation route and now forms the backbone of a popular linear state park and recreation corridor.
-
C.
Burlington Canal
The Burlington Canal is a navigational waterway in Ontario, Canada, that provides ship access between Lake Ontario and Hamilton Harbour.
-
D.
Shinnecock Canal
Shinnecock Canal is a man-made waterway on Long Island, New York, that connects Great Peconic Bay with Shinnecock Bay and helps regulate tidal flow between them.
-
E.
Harlem River Ship Canal
The Harlem River Ship Canal is a man-made waterway in New York City that connects the Hudson and Harlem Rivers, effectively separating Marble Hill from the rest of Manhattan.
- 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: Dismal Swamp Canal Target entity description: The Dismal Swamp Canal is one of the oldest continually operating man-made canals in the United States, historically used for transportation through the Great Dismal Swamp between Virginia and North Carolina.
-
A.
Lewes and Rehoboth Canal
The Lewes and Rehoboth Canal is a man-made waterway in Sussex County, Delaware, that connects the Delaware Bay to Rehoboth Bay and forms part of the Intracoastal Waterway.
-
B.
Delaware and Raritan Canal
The Delaware and Raritan Canal is a historic 19th-century waterway in central New Jersey that once served as a major transportation route and now forms the backbone of a popular linear state park and recreation corridor.
-
C.
Burlington Canal
The Burlington Canal is a navigational waterway in Ontario, Canada, that provides ship access between Lake Ontario and Hamilton Harbour.
-
D.
Shinnecock Canal
Shinnecock Canal is a man-made waterway on Long Island, New York, that connects Great Peconic Bay with Shinnecock Bay and helps regulate tidal flow between them.
-
E.
Harlem River Ship Canal
The Harlem River Ship Canal is a man-made waterway in New York City that connects the Hudson and Harlem Rivers, effectively separating Marble Hill from the rest of Manhattan.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
canal
ⓘ
transportation infrastructure ⓘ |
| associatedWith | George Washington ⓘ |
| connects |
Chesapeake, Virginia
ⓘ
Elizabeth River ⓘ Pasquotank River ⓘ South Mills, North Carolina ⓘ |
| constructionStartDate | 1793 ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| crossesBorderBetween |
Virginia and North Carolina
ⓘ
linked to:
Virginia
|
| currentUse |
recreational boating
ⓘ
yacht and pleasure craft route ⓘ |
| elevation | approximately 16 feet above sea level at summit level ⓘ |
| hasDesignation |
National Historic Civil Engineering Landmark
ⓘ
National Historic Landmark District (corridor context) ⓘ
linked to:
U.S. National Historic Landmark District
|
| hasFeature |
freshwater canal
ⓘ
straight, narrow channel ⓘ tea-colored water from tannins ⓘ |
| hasHazard | fallen trees and debris ⓘ |
| hasLock |
Deep Creek Lock
ⓘ
South Mills Lock ⓘ |
| hasRestriction | draft limitations for deeper vessels ⓘ |
| historicalEra | late 18th century American internal improvements ⓘ |
| historicUse | commercial navigation ⓘ |
| isOneOf | oldest continually operating man-made canals in the United States ⓘ |
| length |
approximately 22 miles
ⓘ
approximately 35 kilometers ⓘ |
| locatedIn |
Atlantic Coastal Plain
ⓘ
linked to:
Atlantic coastal plain
Great Dismal Swamp ⓘ North Carolina ⓘ Virginia ⓘ |
| maintainedBy | U.S. Army Corps of Engineers ⓘ |
| near |
Dismal Swamp State Park
ⓘ
Great Dismal Swamp National Wildlife Refuge ⓘ |
| openingDate | 1805 ⓘ |
| ownedBy | U.S. Army Corps of Engineers ⓘ |
| parallelRoute |
Albemarle and Chesapeake Canal
ⓘ
linked to:
Dismal Swamp Canal
|
| partOf | Atlantic Intracoastal Waterway ⓘ |
| passesThrough | Great Dismal Swamp National Wildlife Refuge vicinity ⓘ |
| primaryUse | transportation ⓘ |
| region |
Mid-Atlantic United States
ⓘ
linked to:
Mid-Atlantic states
|
| wasBuiltFor |
drainage of Great Dismal Swamp
ⓘ
timber extraction ⓘ transportation corridor between Virginia and North Carolina ⓘ |
| wasSurveyedBy | George Washington ⓘ |
| wasUsedDuring | American Civil War ⓘ |
| waterwayType | lock-controlled canal ⓘ |
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: Dismal Swamp Canal Description of subject: The Dismal Swamp Canal is one of the oldest continually operating man-made canals in the United States, historically used for transportation through the Great Dismal Swamp between Virginia and North Carolina.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Dismal Swamp Canal
linked to: Dismal Swamp Canal