Mitchell Dam
E922481
Mitchell Dam is a hydroelectric dam on Alabama’s Coosa River that forms part of a major system of power-generating and flood-control structures in the region.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mitchell Dam canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10633956 — 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: Mitchell Dam Context triple: [Coosa River, hasDam, Mitchell 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.
LaBarge Dam
LaBarge Dam is a small hydroengineering structure located on the Thornapple River in Michigan, used primarily for water level control and local recreation.
-
C.
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.
-
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.
Merwin Dam
Merwin Dam is a hydroelectric dam on Washington State’s Lewis River that forms Lake Merwin and generates power for the region.
- 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: Mitchell Dam Target entity description: Mitchell Dam is a hydroelectric dam on Alabama’s Coosa River that forms part of a major system of power-generating and flood-control structures in the region.
-
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.
LaBarge Dam
LaBarge Dam is a small hydroengineering structure located on the Thornapple River in Michigan, used primarily for water level control and local recreation.
-
C.
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.
-
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.
Merwin Dam
Merwin Dam is a hydroelectric dam on Washington State’s Lewis River that forms Lake Merwin and generates power for the region.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
gravity dam
ⓘ
hydroelectric dam ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| commissioned | 1923 ⓘ |
| constructionBegan | 1920 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| formsReservoir | Mitchell Lake NERFINISHED ⓘ |
| hasFunction |
peak-load power supply
ⓘ
recreation support ⓘ |
| hasPowerPlantType | run-of-river hydroelectric plant ⓘ |
| hasSpillwayType | gated spillway ⓘ |
| height |
about 108 feet
ⓘ
about 33 meters ⓘ |
| installedCapacity | about 60 megawatts ⓘ |
| isDownstreamOf | Lay Dam NERFINISHED ⓘ |
| isUpstreamOf | Jordan Dam NERFINISHED ⓘ |
| length | about 1,500 feet ⓘ |
| locatedInCountry |
United States of America
ⓘ
surface form:
United States
|
| locatedInCounty |
Chilton County, Alabama
NERFINISHED
ⓘ
Coosa County, Alabama NERFINISHED ⓘ |
| locatedInState | Alabama NERFINISHED ⓘ |
| locatedNearCity | Verbena, Alabama NERFINISHED ⓘ |
| locatedOnRiver | Coosa River NERFINISHED ⓘ |
| managingOrganization | Alabama Power Company NERFINISHED ⓘ |
| namedAfter | James Mitchell NERFINISHED ⓘ |
| opened | 1923 ⓘ |
| operator | Alabama Power Company NERFINISHED ⓘ |
| ownedBy | Alabama Power Company NERFINISHED ⓘ |
| partOf |
Alabama Power Coosa River system
NERFINISHED
ⓘ
Coosa River hydroelectric project NERFINISHED ⓘ |
| purpose |
flood control
ⓘ
hydroelectric power generation ⓘ navigation improvement ⓘ |
| region |
Southern United States
ⓘ
surface form:
Southeastern United States
|
| reservoirArea | about 5,850 acres ⓘ |
| reservoirName | Mitchell Lake NERFINISHED ⓘ |
| riverSystem | Coosa River system NERFINISHED ⓘ |
| usedFor |
flood-control system on Coosa River
ⓘ
regional power supply ⓘ |
| watercourse | Coosa 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: Mitchell Dam Description of subject: Mitchell Dam is a hydroelectric dam on Alabama’s Coosa River that forms part of a major system of power-generating and flood-control structures in the region.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.