Thirlmere

E415405

lake reservoir

Thirlmere is a reservoir in England’s Lake District, known for its scenic mountain surroundings and role in supplying water to the city of Manchester.

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All labels observed (2)

Label	Occurrences
Thirlmere canonical	4
Thirlmere Valley	2

How this entity was disambiguated

This entity first appeared as the object of triple T4098709 — 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: Thirlmere
Context triple: [Helvellyn, hasLakeView, Thirlmere]

A. Thirlmere
Thirlmere is a small town in New South Wales, Australia, known for its historic railway heritage and proximity to the Thirlmere Lakes.
B. Malham Tarn
Malham Tarn is a glacial lake in the Yorkshire Dales, England, renowned for its limestone scenery, rich wildlife, and status as a National Nature Reserve.
C. Windermere
Windermere is the largest natural lake in England and a popular tourist destination in the Lake District known for its scenic beauty and boating activities.
D. Grasmere Lake
Grasmere Lake is a picturesque small lake in England’s Lake District, renowned for its scenic beauty and association with the poet William Wordsworth.
E. Coniston Water
Coniston Water is a scenic lake in England’s Lake District, known for its dramatic surrounding fells, boating, and literary and historical associations.
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: Thirlmere
Target entity description: Thirlmere is a reservoir in England’s Lake District, known for its scenic mountain surroundings and role in supplying water to the city of Manchester.

A. Thirlmere
Thirlmere is a small town in New South Wales, Australia, known for its historic railway heritage and proximity to the Thirlmere Lakes.
B. Malham Tarn
Malham Tarn is a glacial lake in the Yorkshire Dales, England, renowned for its limestone scenery, rich wildlife, and status as a National Nature Reserve.
C. Windermere
Windermere is the largest natural lake in England and a popular tourist destination in the Lake District known for its scenic beauty and boating activities.
D. Grasmere Lake
Grasmere Lake is a picturesque small lake in England’s Lake District, renowned for its scenic beauty and association with the poet William Wordsworth.
E. Coniston Water
Coniston Water is a scenic lake in England’s Lake District, known for its dramatic surrounding fells, boating, and literary and historical associations.
F. None of above. chosen

Statements (47)

Predicate	Object
instanceOf	lake ⓘ reservoir ⓘ
aqueductName	Thirlmere Aqueduct ⓘ
basinCountry	United Kingdom ⓘ
catchmentArea	eastern slopes of Helvellyn range ⓘ
completedIn	1894 ⓘ
constructionStartDate	late 19th century ⓘ
country	United Kingdom ⓘ
createdBy	Manchester Corporation ⓘ
damType	masonry dam ⓘ
elevationAboveSeaLevel	approximately 150 m ⓘ
formedBy	damming of natural lakes ⓘ
formedFrom	Leathes Water ⓘ Wythburn Water ⓘ
hasDam	Thirlmere Dam ⓘ
hasIsland	Deer Island ⓘ
hasNearbySettlement	Legburthwaite ⓘ Wythburn ⓘ
hasRoadAlongShore	A591 ⓘ
hasWalkingRoute	access to Helvellyn ridge ⓘ lakeside paths ⓘ
historicalControversy	opposition from Lake District conservationists ⓘ
length	approximately 6 km ⓘ
locatedIn	Cumbria ⓘ England ⓘ Lake District ⓘ
locatedInNationalPark	Lake District ⓘ surface form: Lake District National Park
locatedNear	Dunmail Raise area ⓘ surface form: Dunmail Raise Helvellyn ⓘ Keswick ⓘ
locatedOn	eastern side of the Cumbrian mountains ⓘ
managedBy	United Utilities ⓘ
maximumDepth	approximately 38 m ⓘ
notableFor	role in supplying water to Manchester ⓘ scenic mountain surroundings ⓘ
originalValleyName	Thirlmere self-linksurface differs ⓘ surface form: Thirlmere Valley
outflow	River Cocker NERFINISHED ⓘ
partOf	Thirlmere self-linksurface differs ⓘ surface form: Thirlmere Valley
surfaceArea	approximately 3.3 km² ⓘ
surroundedBy	conifer plantations ⓘ mountains ⓘ
usedFor	drinking water supply ⓘ fishing ⓘ recreation ⓘ walking ⓘ
waterSupplierFor	Manchester ⓘ
waterTransportMethodToManchester	aqueduct ⓘ

How these facts were elicited

Referenced by (6)

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

Helvellyn → hasLakeView → Thirlmere ⓘ

Helvellyn → hasRouteFrom → Thirlmere ⓘ

Cumbrian Mountains → overlooks → Thirlmere ⓘ

Eastern Fells → borders → Thirlmere ⓘ

Thirlmere → partOf → Thirlmere self-linksurface differs ⓘ

this entity surface form: Thirlmere Valley

Thirlmere → originalValleyName → Thirlmere self-linksurface differs ⓘ