Harecastle Tunnel
E182311
Harecastle Tunnel is a historic and notoriously long canal tunnel in Staffordshire, England, known for its low, narrow passage and role in improving industrial-era transport on the Trent and Mersey Canal.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Harecastle Tunnel canonical | 8 |
| Harecastle Canal Tunnels | 1 |
| Harecastle New Tunnel | 1 |
| Harecastle Tunnels | 1 |
| Harecastle tunnel complex | 1 |
| Old Harecastle Tunnel | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1619095 — 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: Harecastle Tunnel Context triple: [Trent and Mersey Canal, hasStructure, Harecastle Tunnel]
-
A.
Foulridge Tunnel
Foulridge Tunnel is a historic canal tunnel in Lancashire, England, carrying the Leeds and Liverpool Canal beneath the village of Foulridge and surrounding hills.
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B.
Reigate Tunnel
Reigate Tunnel is a historic road tunnel in Reigate, Surrey, notable as one of the earliest road tunnels in Britain and now a distinctive local landmark.
-
C.
Hindhead Tunnel
Hindhead Tunnel is a major road tunnel in Surrey, England, carrying the A3 beneath the Devil’s Punch Bowl to improve traffic flow and reduce environmental impact on the surrounding countryside.
-
D.
Dartford Tunnel
The Dartford Tunnel is a major road tunnel under the River Thames in southeast England, forming part of a key river crossing on the London orbital route.
-
E.
Standedge tunnels
The Standedge Tunnels are a historic series of canal and railway tunnels piercing the Pennines in northern England, known as some of the longest and highest transport tunnels in the UK.
- 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: Harecastle Tunnel Target entity description: Harecastle Tunnel is a historic and notoriously long canal tunnel in Staffordshire, England, known for its low, narrow passage and role in improving industrial-era transport on the Trent and Mersey Canal.
-
A.
Foulridge Tunnel
Foulridge Tunnel is a historic canal tunnel in Lancashire, England, carrying the Leeds and Liverpool Canal beneath the village of Foulridge and surrounding hills.
-
B.
Reigate Tunnel
Reigate Tunnel is a historic road tunnel in Reigate, Surrey, notable as one of the earliest road tunnels in Britain and now a distinctive local landmark.
-
C.
Hindhead Tunnel
Hindhead Tunnel is a major road tunnel in Surrey, England, carrying the A3 beneath the Devil’s Punch Bowl to improve traffic flow and reduce environmental impact on the surrounding countryside.
-
D.
Dartford Tunnel
The Dartford Tunnel is a major road tunnel under the River Thames in southeast England, forming part of a key river crossing on the London orbital route.
-
E.
Standedge tunnels
The Standedge Tunnels are a historic series of canal and railway tunnels piercing the Pennines in northern England, known as some of the longest and highest transport tunnels in the UK.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
canal tunnel
ⓘ
transport infrastructure ⓘ |
| architect | James Brindley ⓘ |
| constructionStartDate | 1766 ⓘ |
| country | United Kingdom ⓘ |
| crosses | Harecastle Hill ⓘ |
| hasAccessRestriction | powered craft only under control of tunnel keeper ⓘ |
| hasFeature |
artificial lighting
ⓘ
mechanical ventilation system ⓘ narrow bore ⓘ no internal towpath ⓘ very low headroom ⓘ |
| hasMaximumBoatBeam | about 7 feet ⓘ |
| hasMaximumBoatHeight | about 6 feet ⓘ |
| hasNavigationControl |
one-way working
ⓘ
timed convoys ⓘ |
| hasPart |
Brindley Tunnel
ⓘ
linked to:
Preston Brook Tunnel
Telford Tunnel ⓘ |
| hasPortal |
northern portal near Hardings Wood Junction
ⓘ
southern portal at Kidsgrove ⓘ |
| hasReputation |
associated with ghost stories and legends
ⓘ
notoriously low and narrow ⓘ one of the longest canal tunnels in the UK ⓘ |
| hasSafetyFeature | ventilation fans at portal ⓘ |
| heritageStatus | historic structure ⓘ |
| historicalPeriod | Industrial Revolution ⓘ |
| inception | 1770s ⓘ |
| length |
approximately 1.7 miles
ⓘ
approximately 2.7 kilometres ⓘ |
| locatedIn |
England
ⓘ
Staffordshire ⓘ |
| locatedNear |
Kidsgrove
ⓘ
Stoke-on-Trent ⓘ |
| locatedOnWaterway | Trent and Mersey Canal ⓘ |
| material |
brick
ⓘ
stone ⓘ |
| namedAfter | Harecastle ⓘ |
| numberOfTunnels | 2 ⓘ |
| opened | 1777 ⓘ |
| operator | Canal & River Trust ⓘ |
| originalUse | industrial freight transport ⓘ |
| owner | Canal & River Trust ⓘ |
| partOf | Trent and Mersey Canal ⓘ |
| partOfRoute |
Trent–Mersey canal route between Stoke-on-Trent and the Cheshire Plain
ⓘ
linked to:
Trent and Mersey Canal
|
| significantFor |
improving industrial-era transport
ⓘ
shortening the route over Harecastle Hill ⓘ |
| status | open to navigation ⓘ |
| usedFor |
leisure boating
ⓘ
narrowboat navigation ⓘ |
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: Harecastle Tunnel Description of subject: Harecastle Tunnel is a historic and notoriously long canal tunnel in Staffordshire, England, known for its low, narrow passage and role in improving industrial-era transport on the Trent and Mersey Canal.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Harecastle Tunnel
linked to: Harecastle Tunnel
linked to: Harecastle Tunnel
linked to: Harecastle Tunnel
linked to: Harecastle Tunnel