Oker Dam
E326297
Oker Dam is a reservoir dam on the Oker River in the Harz Mountains of Germany, primarily used for water supply, flood control, and hydroelectric power generation.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Oker Dam canonical | 2 |
| Oker Dam reservoir | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2938254 — 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: Oker Dam Context triple: [Oker, hasDam, Oker Dam]
-
A.
McClure Dam
McClure Dam is a hydroelectric dam on the Dead River in Michigan, forming McClure Basin and providing power and water management for the surrounding region.
-
B.
Palisade Dam
Palisade Dam is an irrigation and water storage structure located on the Sevier River in central Utah, supporting local agriculture and recreation.
-
C.
Oxbow Dam
Oxbow Dam is a hydroelectric dam on the Snake River in eastern Oregon, forming Oxbow Reservoir as part of the Hells Canyon Complex.
-
D.
O'Shaughnessy Dam
O'Shaughnessy Dam is a concrete arch-gravity dam in Yosemite National Park that creates the Hetch Hetchy Reservoir, supplying water and hydroelectric power to the San Francisco Bay Area.
-
E.
Red Rock Dam
Red Rock Dam is a large flood-control and hydroelectric dam on the Des Moines River in central Iowa, forming Lake Red Rock as the state’s largest reservoir.
- 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: Oker Dam Target entity description: Oker Dam is a reservoir dam on the Oker River in the Harz Mountains of Germany, primarily used for water supply, flood control, and hydroelectric power generation.
-
A.
McClure Dam
McClure Dam is a hydroelectric dam on the Dead River in Michigan, forming McClure Basin and providing power and water management for the surrounding region.
-
B.
Palisade Dam
Palisade Dam is an irrigation and water storage structure located on the Sevier River in central Utah, supporting local agriculture and recreation.
-
C.
Oxbow Dam
Oxbow Dam is a hydroelectric dam on the Snake River in eastern Oregon, forming Oxbow Reservoir as part of the Hells Canyon Complex.
-
D.
O'Shaughnessy Dam
O'Shaughnessy Dam is a concrete arch-gravity dam in Yosemite National Park that creates the Hetch Hetchy Reservoir, supplying water and hydroelectric power to the San Francisco Bay Area.
-
E.
Red Rock Dam
Red Rock Dam is a large flood-control and hydroelectric dam on the Des Moines River in central Iowa, forming Lake Red Rock as the state’s largest reservoir.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
gravity dam
ⓘ
reservoir dam ⓘ |
| basinCountry | Germany ⓘ |
| constructionEnd | 1956 ⓘ |
| constructionStart | 1938 ⓘ |
| country | Germany ⓘ |
| crosses | Oker River NERFINISHED ⓘ |
| hasFunction | sediment retention ⓘ |
| hasPowerPlant | Oker Dam hydroelectric power plant ⓘ |
| hasRoadOnCrest | yes ⓘ |
| hasSpillway | yes ⓘ |
| height | approximately 75 m ⓘ |
| impounds | Oker Reservoir ⓘ |
| length | approximately 260 m ⓘ |
| locatedIn |
Harz
ⓘ
surface form:
Harz Mountains
|
| locatedInRegion |
Harz
ⓘ
surface form:
Upper Harz
|
| locatedInState | Lower Saxony ⓘ |
| locatedNear |
Altenau
ⓘ
Goslar ⓘ |
| locatedOnRiver | Oker River NERFINISHED ⓘ |
| material | concrete ⓘ |
| near | Harz National Park ⓘ |
| nearbySettlement |
Okertal
ⓘ
Benneckenstein (Harz) ⓘ
surface form:
Schulenberg im Oberharz
|
| opened | 1956 ⓘ |
| operator | Harzwasserwerke GmbH ⓘ |
| owner | Harzwasserwerke GmbH ⓘ |
| partOf |
UNESCO World Heritage Site Upper Harz Water Management System
ⓘ
surface form:
Harz water management system
|
| primaryUse |
flood control
ⓘ
hydroelectric power generation ⓘ water supply ⓘ |
| purpose |
drinking water supply for parts of Lower Saxony
ⓘ
low-flow augmentation of rivers ⓘ protection against flooding along the Oker ⓘ |
| regionServed |
Brunswick
ⓘ
surface form:
Brunswick area
Harz foreland ⓘ
surface form:
northern Harz foreland
|
| reservoirName | Okerstausee ⓘ |
| reservoirSurfaceArea | approximately 2.3 square kilometres ⓘ |
| reservoirTotalCapacity | approximately 47 million cubic metres ⓘ |
| secondaryUse |
recreation
ⓘ
tourism ⓘ |
| touristAttraction | viewpoints over Okertal valley ⓘ |
| usedFor |
angling
ⓘ
navigation of small recreational boats on reservoir ⓘ water sports ⓘ |
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: Oker Dam Description of subject: Oker Dam is a reservoir dam on the Oker River in the Harz Mountains of Germany, primarily used for water supply, flood control, and hydroelectric power generation.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Oker Dam reservoir