Derwent Dam
E499328
Derwent Dam is a large historic masonry dam in Derbyshire, England, best known for its role in World War II RAF "Dambusters" training and as a prominent feature of the Upper Derwent Valley.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Derwent Dam canonical | 3 |
| Derwent Valley dams | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5156118 — 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: Derwent Dam Context triple: [Derwent Reservoir, hasFeature, Derwent Dam]
-
A.
Bleiloch Dam
Bleiloch Dam is a large hydroelectric and flood-control dam in Thuringia, Germany, forming the country’s biggest reservoir on the upper Saale River.
-
B.
Keswick Dam
Keswick Dam is a concrete gravity dam on the Sacramento River in Northern California that regulates flows and generates hydroelectric power as part of the region’s large federal water management system.
-
C.
Keenleyside Dam
Keenleyside Dam is a major hydroelectric and flood-control dam on the Columbia River in British Columbia, Canada, forming part of the region’s large transboundary water management system.
-
D.
Lymm Dam
Lymm Dam is a historic man-made lake and surrounding woodland in Lymm, Cheshire, popular for walking, wildlife, and scenic views.
-
E.
Derby Dam
Derby Dam is an early 20th-century diversion dam on Nevada’s Truckee River, built as part of the Newlands Reclamation Project to supply irrigation water to nearby agricultural lands.
- 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: Derwent Dam Target entity description: Derwent Dam is a large historic masonry dam in Derbyshire, England, best known for its role in World War II RAF "Dambusters" training and as a prominent feature of the Upper Derwent Valley.
-
A.
Bleiloch Dam
Bleiloch Dam is a large hydroelectric and flood-control dam in Thuringia, Germany, forming the country’s biggest reservoir on the upper Saale River.
-
B.
Keswick Dam
Keswick Dam is a concrete gravity dam on the Sacramento River in Northern California that regulates flows and generates hydroelectric power as part of the region’s large federal water management system.
-
C.
Keenleyside Dam
Keenleyside Dam is a major hydroelectric and flood-control dam on the Columbia River in British Columbia, Canada, forming part of the region’s large transboundary water management system.
-
D.
Lymm Dam
Lymm Dam is a historic man-made lake and surrounding woodland in Lymm, Cheshire, popular for walking, wildlife, and scenic views.
-
E.
Derby Dam
Derby Dam is an early 20th-century diversion dam on Nevada’s Truckee River, built as part of the Newlands Reclamation Project to supply irrigation water to nearby agricultural lands.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
masonry dam
ⓘ
reservoir dam ⓘ |
| architecturalStyle | masonry gravity dam ⓘ |
| associatedWith |
No. 617 Squadron RAF
NERFINISHED
ⓘ
World War II NERFINISHED ⓘ |
| builtFor | Sheffield Corporation NERFINISHED ⓘ |
| commemoratedBy | Dambusters memorial plaque ⓘ |
| constructionEndDate | 1916 ⓘ |
| constructionStartDate | 1902 ⓘ |
| country | United Kingdom ⓘ |
| crosses | River Derwent NERFINISHED ⓘ |
| featuredIn | The Dam Busters (1955 film) NERFINISHED ⓘ |
| hasActivity |
cycling
ⓘ
walking ⓘ wildlife watching ⓘ |
| hasFunction |
flood control
ⓘ
public water supply ⓘ recreation ⓘ |
| hasParkingFacility | Fairholmes car park ⓘ |
| hasSpillway | yes ⓘ |
| hasTower | two ornamental towers ⓘ |
| hasViewpoint | Derwent Reservoir viewpoints ⓘ |
| height | approximately 34 metres ⓘ |
| heritageStatus | historic structure ⓘ |
| impounds | Derwent Reservoir NERFINISHED ⓘ |
| knownFor | RAF Dambusters training ⓘ |
| length | approximately 340 metres ⓘ |
| locatedIn |
Derbyshire
ⓘ
England ⓘ Upper Derwent Valley NERFINISHED ⓘ |
| locatedInProtectedArea | Peak District National Park NERFINISHED ⓘ |
| locatedNear |
Howden Dam
NERFINISHED
ⓘ
Ladybower Reservoir NERFINISHED ⓘ |
| locatedUpstreamOf | Ladybower Dam NERFINISHED ⓘ |
| managedBy | Severn Trent Water NERFINISHED ⓘ |
| materialUsed |
concrete
ⓘ
stone ⓘ |
| nearbySettlement |
Bamford
NERFINISHED
ⓘ
Fairholmes NERFINISHED ⓘ |
| opened | 1916 ⓘ |
| ownedBy | Severn Trent Water NERFINISHED ⓘ |
| partOf |
Derwent Valley Dams
NERFINISHED
ⓘ
Derwent Valley water supply system NERFINISHED ⓘ Upper Derwent Reservoirs NERFINISHED ⓘ |
| touristAttraction | yes ⓘ |
| usedBy | Royal Air Force ⓘ |
| usedFor |
low-level bombing practice
ⓘ
training for Operation Chastise ⓘ |
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: Derwent Dam Description of subject: Derwent Dam is a large historic masonry dam in Derbyshire, England, best known for its role in World War II RAF "Dambusters" training and as a prominent feature of the Upper Derwent Valley.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Derwent Valley dams