Mormon Flat Dam
E373605
Mormon Flat Dam is a concrete thin arch dam on Arizona’s Salt River that forms Canyon Lake and helps provide hydroelectric power, water storage, and flood control for the region.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mormon Flat Dam canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T3338637 — 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: Mormon Flat Dam Context triple: [Salt River, hasDam, Mormon Flat Dam]
-
A.
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.
-
B.
Piute Dam
Piute Dam is an irrigation and water storage structure on the Sevier River in south-central Utah, forming Piute Reservoir to support agriculture in the surrounding region.
-
C.
Hollywood Dam
Hollywood Dam is a concrete arch-gravity dam in the Hollywood Hills of Los Angeles that impounds the Hollywood Reservoir as part of the city’s water supply system.
-
D.
La Mesa Dam
La Mesa Dam is a major water reservoir in Quezon City, Philippines, that supplies a significant portion of Metro Manila’s drinking water.
-
E.
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.
- 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: Mormon Flat Dam Target entity description: Mormon Flat Dam is a concrete thin arch dam on Arizona’s Salt River that forms Canyon Lake and helps provide hydroelectric power, water storage, and flood control for the region.
-
A.
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.
-
B.
Piute Dam
Piute Dam is an irrigation and water storage structure on the Sevier River in south-central Utah, forming Piute Reservoir to support agriculture in the surrounding region.
-
C.
Hollywood Dam
Hollywood Dam is a concrete arch-gravity dam in the Hollywood Hills of Los Angeles that impounds the Hollywood Reservoir as part of the city’s water supply system.
-
D.
La Mesa Dam
La Mesa Dam is a major water reservoir in Quezon City, Philippines, that supplies a significant portion of Metro Manila’s drinking water.
-
E.
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.
- F. None of above. chosen
Statements (35)
| Predicate | Object |
|---|---|
| instanceOf |
arch dam
ⓘ
concrete thin arch dam ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| constructionMaterial | concrete ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| creates | Canyon Lake ⓘ |
| damType |
curved concrete dam
ⓘ
thin arch ⓘ |
| downstreamFrom | Horse Mesa Dam ⓘ |
| formsReservoir | Canyon Lake ⓘ |
| hasFunction |
regulation of Salt River flows
ⓘ
support of downstream irrigation ⓘ |
| hasNameOrigin | named after nearby Mormon Flat area ⓘ |
| impounds | Salt River ⓘ |
| locatedIn |
Arizona
ⓘ
Maricopa County, Arizona ⓘ Salt River Canyon area ⓘ Tonto National Forest ⓘ
surface form:
Tonto National Forest region
|
| locatedNear | Apache Junction, Arizona ⓘ |
| locatedOnRiver | Salt River ⓘ |
| operator | Salt River Project ⓘ |
| ownedBy | Salt River Project ⓘ |
| partOf |
Salt River Project
ⓘ
surface form:
Salt River Project power system
Salt River Project ⓘ
surface form:
Salt River Project water system
Salt River Project ⓘ
surface form:
Salt River chain of dams
|
| purpose |
flood control
ⓘ
hydroelectric power generation ⓘ water storage ⓘ |
| regionServed | Phoenix metropolitan area ⓘ |
| riverSystem |
Gila River
ⓘ
surface form:
Gila River basin
|
| upstreamFrom | Stewart Mountain Dam ⓘ |
| usedFor |
electricity generation
ⓘ
recreation support on Canyon Lake ⓘ regional water supply ⓘ |
| waterBodyCreated |
Canyon Lake
ⓘ
surface form:
Canyon Lake, Arizona
|
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: Mormon Flat Dam Description of subject: Mormon Flat Dam is a concrete thin arch dam on Arizona’s Salt River that forms Canyon Lake and helps provide hydroelectric power, water storage, and flood control for the region.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.