Pen-y-garreg Reservoir

E239821

man-made lake 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.

Try in SPARQL Jump to: Surface forms Statements Referenced by

All labels observed (4)

Label	Occurrences
Pen-y-garreg Dam	4
Pen-y-garreg Reservoir canonical	4
Pen-y-Garreg Reservoir	1
Pen-y-garreg Dam valve tower	1

Statements (47)

Predicate	Object
instanceOf	man-made lake ⓘ reservoir ⓘ
basinCountry	United Kingdom ⓘ
connectedTo	Derwent Valley Water Board ⓘ surface form: Birmingham Corporation water supply scheme
constructionMaterial	stone ⓘ
country	Wales ⓘ
createdBy	Pen-y-garreg Reservoir self-linksurface differs ⓘ surface form: Pen-y-garreg Dam
drainsTo	River Elan ⓘ
ecosystemType	freshwater lake ⓘ
environment	upland valley landscape ⓘ
hasAccess	Elan Valley Trail ⓘ
hasFeature	historic stone dam ⓘ valley-side masonry dam ⓘ
hasNearbyFacility	car park ⓘ viewing area ⓘ
hasNearbyStructure	Pen-y-garreg Reservoir self-linksurface differs ⓘ surface form: Pen-y-garreg Dam valve tower
hasPart	Pen-y-garreg Reservoir self-linksurface differs ⓘ surface form: Pen-y-garreg Dam
hasRecreationRoute	circular walking paths around reservoir ⓘ
hasViewpoint	Pen-y-garreg Dam tower ⓘ
knownFor	historic waterworks ⓘ picturesque dam architecture ⓘ scenic views ⓘ
locatedIn	Elan Valley ⓘ Powys ⓘ mid Wales ⓘ
managesWaterFor	Birmingham ⓘ
near	Caban Coch Reservoir ⓘ surface form: Caban-coch Reservoir Craig Goch Reservoir ⓘ Garreg Ddu Reservoir ⓘ surface form: Garreg-ddu Reservoir
operator	Dŵr Cymru Welsh Water ⓘ
ownedBy	Dŵr Cymru Welsh Water ⓘ
partOf	Elan Valley Estate ⓘ Elan Valley reservoirs ⓘ surface form: Elan Valley Reservoirs Elan Valley reservoirs ⓘ surface form: Elan Valley dams and reservoirs complex Elan Valley reservoirs ⓘ surface form: Elan Valley water supply system
purpose	drinking water storage ⓘ public water supply ⓘ
region	Elan Valley ⓘ surface form: Elan Valley, Powys
subjectTo	UK reservoir safety regulations ⓘ
tourismType	rural tourism attraction ⓘ
usedFor	angling ⓘ flow regulation ⓘ hydraulic head regulation ⓘ recreation ⓘ walking ⓘ wildlife observation ⓘ
watercourse	River Elan ⓘ

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: Pen-y-garreg Reservoir
Description of subject: 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.

Referenced by (10)

Full triples — surface form annotated when it differs from this entity's canonical label.

Rhayader → hasNearbyReservoir → Pen-y-garreg Reservoir ⓘ

Garreg Ddu Reservoir → near → Pen-y-garreg Reservoir ⓘ

this entity surface form: Pen-y-Garreg Reservoir

Pen-y-garreg Reservoir → createdBy → Pen-y-garreg Reservoir self-linksurface differs ⓘ

this entity surface form: Pen-y-garreg Dam

Pen-y-garreg Reservoir → hasPart → Pen-y-garreg Reservoir self-linksurface differs ⓘ

this entity surface form: Pen-y-garreg Dam

Pen-y-garreg Reservoir → hasNearbyStructure → Pen-y-garreg Reservoir self-linksurface differs ⓘ

this entity surface form: Pen-y-garreg Dam valve tower

Elan Valley → hasPart → Pen-y-garreg Reservoir ⓘ

this entity surface form: Pen-y-garreg Dam

Elan Valley reservoirs → hasPart → Pen-y-garreg Reservoir ⓘ

Elan Valley reservoirs → hasStructure → Pen-y-garreg Reservoir ⓘ

this entity surface form: Pen-y-garreg Dam

Elan Valley Estate → hasPart → Pen-y-garreg Reservoir ⓘ