Madden Dam
E832420
Madden Dam is a major concrete gravity dam in Panama that helps regulate the flow of the Chagres River and supplies water for the Panama Canal and hydroelectric power generation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Madden Dam canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9174936 — 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: Madden Dam Context triple: [Chagres River, hasDam, Madden Dam]
-
A.
Milner Dam
Milner Dam is an early 20th-century irrigation and hydroelectric dam on the Snake River in southern Idaho that helps divert water for agriculture and power generation.
-
B.
Howden Dam
Howden Dam is a large masonry dam in Derbyshire, England, forming part of the Upper Derwent Valley reservoir system and known for its impressive architecture and role in regional water supply.
-
C.
Wyman Dam
Wyman Dam is a hydroelectric dam in Maine that impounds the Kennebec River to form Wyman Lake and generate power.
-
D.
Wyman Dam
Wyman Dam is a hydroelectric dam located on the Androscoggin River in Maine, used for power generation and river flow regulation.
-
E.
Belver Dam
Belver Dam is a hydroelectric dam on the Tagus River in Portugal, used primarily for power generation and river flow regulation.
- 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: Madden Dam Target entity description: Madden Dam is a major concrete gravity dam in Panama that helps regulate the flow of the Chagres River and supplies water for the Panama Canal and hydroelectric power generation.
-
A.
Milner Dam
Milner Dam is an early 20th-century irrigation and hydroelectric dam on the Snake River in southern Idaho that helps divert water for agriculture and power generation.
-
B.
Howden Dam
Howden Dam is a large masonry dam in Derbyshire, England, forming part of the Upper Derwent Valley reservoir system and known for its impressive architecture and role in regional water supply.
-
C.
Wyman Dam
Wyman Dam is a hydroelectric dam in Maine that impounds the Kennebec River to form Wyman Lake and generate power.
-
D.
Wyman Dam
Wyman Dam is a hydroelectric dam located on the Androscoggin River in Maine, used for power generation and river flow regulation.
-
E.
Belver Dam
Belver Dam is a hydroelectric dam on the Tagus River in Portugal, used primarily for power generation and river flow regulation.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
concrete gravity dam
ⓘ
dam ⓘ |
| alsoKnownAs |
Alajuela Dam
NERFINISHED
ⓘ
Madden Lake Dam NERFINISHED ⓘ |
| basinCountry | Panama NERFINISHED ⓘ |
| constructionStartDate | 1932 ⓘ |
| continent | North America ⓘ |
| country | Panama ⓘ |
| damType | gravity dam ⓘ |
| designedFor | regulating Chagres River flow ⓘ |
| energySource | hydropower ⓘ |
| formsReservoir | Lake Alajuela NERFINISHED ⓘ |
| hasHydroelectricPlant | Madden Dam Hydroelectric Plant NERFINISHED ⓘ |
| locatedIn | Panama Canal watershed ⓘ |
| locatedNear | Gamboa, Panama NERFINISHED ⓘ |
| locatedOnRiver | Chagres River NERFINISHED ⓘ |
| material | concrete ⓘ |
| openingDate | 1935 ⓘ |
| operator | Panama Canal Authority NERFINISHED ⓘ |
| ownedBy | Panama Canal Authority NERFINISHED ⓘ |
| partOf | Panama Canal water management system NERFINISHED ⓘ |
| purpose |
flood control
ⓘ
flow regulation ⓘ hydroelectric power generation ⓘ water supply ⓘ |
| region | Panama Province NERFINISHED ⓘ |
| reservoirName | Lake Alajuela NERFINISHED ⓘ |
| suppliesWaterTo | Panama Canal NERFINISHED ⓘ |
| supportsFunction | operation of the Panama Canal ⓘ |
| watercourse | Chagres River NERFINISHED ⓘ |
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: Madden Dam Description of subject: Madden Dam is a major concrete gravity dam in Panama that helps regulate the flow of the Chagres River and supplies water for the Panama Canal and hydroelectric power generation.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.