artificial lake Llyn Trawsfynydd
E253535
Artificial lake Llyn Trawsfynydd is a man-made reservoir in Gwynedd, Wales, originally created to supply cooling water for the now-decommissioned Trawsfynydd nuclear power station and now used for recreation and fishing.
All labels observed (1)
| Label | Occurrences |
|---|---|
| artificial lake Llyn Trawsfynydd canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2294262 — 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: artificial lake Llyn Trawsfynydd Context triple: [Trawsfynydd, hasNearbyFeature, artificial lake Llyn Trawsfynydd]
-
A.
Llyn Llydaw
Llyn Llydaw is a glacial lake on the eastern flanks of Snowdon in Snowdonia National Park, Wales, renowned for its scenic mountain setting and association with local legends.
-
B.
Garreg Ddu Reservoir
Garreg Ddu Reservoir is a scenic man-made lake in the Elan Valley of mid-Wales, known for its distinctive submerged dam and role in supplying water to the city of Birmingham.
-
C.
Llyn Tegid
Llyn Tegid, also known as Bala Lake, is the largest natural lake in Wales, renowned for its scenic beauty and unique aquatic wildlife.
-
D.
Pen-y-garreg Reservoir
Pen-y-garreg Reservoir is a scenic man-made lake in the Elan Valley of mid Wales, known for its historic stone dam and role in the region’s water supply system.
-
E.
Dunorlan Park lake
Dunorlan Park lake is an ornamental boating and wildlife lake situated within Dunorlan Park in Royal Tunbridge Wells, Kent, England.
- 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: artificial lake Llyn Trawsfynydd Target entity description: Artificial lake Llyn Trawsfynydd is a man-made reservoir in Gwynedd, Wales, originally created to supply cooling water for the now-decommissioned Trawsfynydd nuclear power station and now used for recreation and fishing.
-
A.
Llyn Llydaw
Llyn Llydaw is a glacial lake on the eastern flanks of Snowdon in Snowdonia National Park, Wales, renowned for its scenic mountain setting and association with local legends.
-
B.
Garreg Ddu Reservoir
Garreg Ddu Reservoir is a scenic man-made lake in the Elan Valley of mid-Wales, known for its distinctive submerged dam and role in supplying water to the city of Birmingham.
-
C.
Llyn Tegid
Llyn Tegid, also known as Bala Lake, is the largest natural lake in Wales, renowned for its scenic beauty and unique aquatic wildlife.
-
D.
Pen-y-garreg Reservoir
Pen-y-garreg Reservoir is a scenic man-made lake in the Elan Valley of mid Wales, known for its historic stone dam and role in the region’s water supply system.
-
E.
Dunorlan Park lake
Dunorlan Park lake is an ornamental boating and wildlife lake situated within Dunorlan Park in Royal Tunbridge Wells, Kent, England.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
artificial lake
ⓘ
reservoir ⓘ |
| associatedWith | Trawsfynydd nuclear power station decommissioning ⓘ |
| basinCountry | United Kingdom ⓘ |
| climateZone | temperate maritime climate ⓘ |
| country | Wales ⓘ |
| createdFor | Trawsfynydd nuclear power station ⓘ |
| currentUse |
fishing
ⓘ
recreation ⓘ |
| environmentalContext | post-industrial landscape ⓘ |
| formedBy | construction of dam ⓘ |
| governedBy |
Gwynedd Council
ⓘ
surface form:
local authority of Gwynedd
|
| hasActivity |
angling
ⓘ
boating ⓘ walking ⓘ wildlife watching ⓘ |
| hasFeature |
access roads
ⓘ
man-made reservoir basin ⓘ surrounding hills ⓘ |
| hasFishSpecies |
perch
ⓘ
pike ⓘ trout ⓘ |
| hasManagement | angling club ⓘ |
| hasOrigin | industrial energy project ⓘ |
| hasRecreationalFacility |
car parks
ⓘ
fishing platforms ⓘ footpaths ⓘ |
| hasShoreLength | irregular, indented shoreline ⓘ |
| hasStatus | man-made water body ⓘ |
| hasViewOf | surrounding mountains of Snowdonia ⓘ |
| inflow | Afon Prysor ⓘ |
| locatedIn |
Gwynedd
ⓘ
Snowdonia ⓘ
surface form:
Snowdonia National Park
|
| locatedNear | village of Trawsfynydd ⓘ |
| locatedOn | A470 corridor ⓘ |
| nearbyInfrastructure | Trawsfynydd nuclear power station ⓘ |
| nearbySettlement |
Blaenau Ffestiniog
ⓘ
Trawsfynydd ⓘ |
| outflow | Afon Prysor ⓘ |
| partOf | hydrological system of Afon Prysor ⓘ |
| primaryPurposeOriginal | cooling water supply ⓘ |
| region | North Wales ⓘ |
| usedBy |
local anglers
ⓘ
tourists ⓘ |
| waterBodyType | freshwater lake ⓘ |
| waterSource | Afon Prysor ⓘ |
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: artificial lake Llyn Trawsfynydd Description of subject: Artificial lake Llyn Trawsfynydd is a man-made reservoir in Gwynedd, Wales, originally created to supply cooling water for the now-decommissioned Trawsfynydd nuclear power station and now used for recreation and fishing.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.