Barmouth Bridge
E273159
Barmouth Bridge is a historic wooden viaduct carrying the railway across the Mawddach Estuary near Barmouth in Gwynedd, Wales.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Barmouth Bridge canonical | 24 |
How this entity was disambiguated
This entity first appeared as the object of triple T2102679 — 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: Barmouth Bridge Context triple: [Cambrian Line, hasStructure, Barmouth Bridge]
-
A.
Briton Ferry Bridge
Briton Ferry Bridge is a historic road bridge in South Wales that spans the River Neath, linking the town of Briton Ferry with Neath and the wider Neath Port Talbot area.
-
B.
Chepstow Bridge
Chepstow Bridge is a historic cast-iron road bridge spanning the River Wye between Chepstow in Wales and Gloucestershire in England.
-
C.
Severn Bridge
Severn Bridge is a major suspension bridge in the United Kingdom that spans the River Severn and connects England with South Wales.
-
D.
Ha'penny Bridge
Ha'penny Bridge is a historic cast-iron pedestrian bridge over the River Liffey and one of Dublin’s most iconic symbols.
-
E.
Ethelfleda Bridge
Ethelfleda Bridge is a historic railway bridge in Runcorn, England, carrying trains across the River Mersey and the Manchester Ship Canal.
- 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: Barmouth Bridge Target entity description: Barmouth Bridge is a historic wooden viaduct carrying the railway across the Mawddach Estuary near Barmouth in Gwynedd, Wales.
-
A.
Briton Ferry Bridge
Briton Ferry Bridge is a historic road bridge in South Wales that spans the River Neath, linking the town of Briton Ferry with Neath and the wider Neath Port Talbot area.
-
B.
Chepstow Bridge
Chepstow Bridge is a historic cast-iron road bridge spanning the River Wye between Chepstow in Wales and Gloucestershire in England.
-
C.
Severn Bridge
Severn Bridge is a major suspension bridge in the United Kingdom that spans the River Severn and connects England with South Wales.
-
D.
Ha'penny Bridge
Ha'penny Bridge is a historic cast-iron pedestrian bridge over the River Liffey and one of Dublin’s most iconic symbols.
-
E.
Ethelfleda Bridge
Ethelfleda Bridge is a historic railway bridge in Runcorn, England, carrying trains across the River Mersey and the Manchester Ship Canal.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
listed building
ⓘ
railway bridge ⓘ viaduct ⓘ |
| carries | Cambrian Line ⓘ |
| connects |
Barmouth
ⓘ
Morfa Mawddach ⓘ |
| constructionStart | 1864 ⓘ |
| country | Wales ⓘ |
| crosses |
Mawddach Estuary
ⓘ
River Mawddach ⓘ |
| designedFor | standard gauge railway ⓘ |
| hasCoordinate | 52.720°N 4.055°W ⓘ |
| hasFeature |
metal swing span
ⓘ
timber trestles ⓘ |
| hasPart | swing bridge ⓘ |
| hasStructureType | trestle bridge ⓘ |
| hasToll | pedestrian toll (historically) ⓘ |
| heritageStatus | Grade II* listed ⓘ |
| isOn |
Mawddach Trail (pedestrian and cycle route, alongside)
ⓘ
linked to:
Mawddach Trail
|
| length |
about 820 metres
ⓘ
about 900 yards ⓘ |
| locatedIn |
Barmouth
ⓘ
Gwynedd ⓘ United Kingdom ⓘ Wales ⓘ |
| material |
iron
ⓘ
steel ⓘ wood ⓘ |
| near |
Cardigan Bay
ⓘ
Snowdonia National Park ⓘ
linked to:
Snowdonia
|
| notableFor |
being one of the longest timber viaducts in the UK
ⓘ
its scenic coastal location ⓘ |
| numberOfSpans | over 100 ⓘ |
| opened | 1867 ⓘ |
| operator | Network Rail ⓘ |
| owner | Network Rail ⓘ |
| partOf |
Cambrian Coast railway
ⓘ
linked to:
Cambrian Coast Line
|
| status | in use ⓘ |
| subjectTo | extensive maintenance and repair works ⓘ |
| usedFor |
pedestrian traffic
ⓘ
rail traffic ⓘ |
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: Barmouth Bridge Description of subject: Barmouth Bridge is a historic wooden viaduct carrying the railway across the Mawddach Estuary near Barmouth in Gwynedd, Wales.
Referenced by (24)
Full triples — surface form annotated when it differs from this entity's canonical label.