Saylorville Dam
E731621
Saylorville Dam is a large flood-control and recreation dam on the Des Moines River in central Iowa, forming Saylorville Lake just upstream of Des Moines.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Saylorville Dam canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7914534 — 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: Saylorville Dam Context triple: [Des Moines River, hasDam, Saylorville Dam]
-
A.
R. L. Harris Dam
R. L. Harris Dam is a hydroelectric dam in Alabama that impounds the Tallapoosa River to form Lake Wedowee and generate power.
-
B.
Morris Sheppard Dam
Morris Sheppard Dam is a large hydroelectric and flood-control structure in Texas that impounds the Brazos River to form Possum Kingdom Lake.
-
C.
Lewisville Dam
Lewisville Dam is an earthen embankment dam in North Texas that impounds the Elm Fork of the Trinity River to form Lewisville Lake for flood control, water supply, and recreation.
-
D.
Chatfield Dam
Chatfield Dam is a large flood-control and water-storage structure in Colorado that creates Chatfield Reservoir on the South Platte River near Denver.
-
E.
Walterville Dam
Walterville Dam is a hydroelectric diversion dam on Oregon’s McKenzie River that channels water to the Walterville Power Canal and generating station.
- 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: Saylorville Dam Target entity description: Saylorville Dam is a large flood-control and recreation dam on the Des Moines River in central Iowa, forming Saylorville Lake just upstream of Des Moines.
-
A.
R. L. Harris Dam
R. L. Harris Dam is a hydroelectric dam in Alabama that impounds the Tallapoosa River to form Lake Wedowee and generate power.
-
B.
Morris Sheppard Dam
Morris Sheppard Dam is a large hydroelectric and flood-control structure in Texas that impounds the Brazos River to form Possum Kingdom Lake.
-
C.
Lewisville Dam
Lewisville Dam is an earthen embankment dam in North Texas that impounds the Elm Fork of the Trinity River to form Lewisville Lake for flood control, water supply, and recreation.
-
D.
Chatfield Dam
Chatfield Dam is a large flood-control and water-storage structure in Colorado that creates Chatfield Reservoir on the South Platte River near Denver.
-
E.
Walterville Dam
Walterville Dam is a hydroelectric diversion dam on Oregon’s McKenzie River that channels water to the Walterville Power Canal and generating station.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
dam
ⓘ
flood control structure ⓘ recreation dam ⓘ |
| basin | Mississippi River basin NERFINISHED ⓘ |
| controlsFloodingFor | Des Moines metropolitan area NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| createsReservoir | Saylorville Lake NERFINISHED ⓘ |
| forms | Saylorville Lake NERFINISHED ⓘ |
| hasFunction |
providing recreational opportunities
ⓘ
reducing downstream flooding ⓘ |
| impounds | Des Moines River NERFINISHED ⓘ |
| locatedIn | Iowa ⓘ |
| locatedInCounty |
Dallas County, Iowa
NERFINISHED
ⓘ
Polk County, Iowa NERFINISHED ⓘ |
| locatedNear | Des Moines, Iowa NERFINISHED ⓘ |
| locatedOnRiver | Des Moines River NERFINISHED ⓘ |
| managingAgency | United States Army Corps of Engineers NERFINISHED ⓘ |
| nearbyCity | Johnston, Iowa NERFINISHED ⓘ |
| nearbyCommunity | Saylorville, Iowa NERFINISHED ⓘ |
| partOf | Des Moines River flood control system NERFINISHED ⓘ |
| purpose |
flood control
ⓘ
recreation ⓘ |
| recreationActivities |
boating
ⓘ
camping ⓘ fishing ⓘ wildlife viewing ⓘ |
| region | central Iowa NERFINISHED ⓘ |
| state | Iowa ⓘ |
| upstreamFrom | Des Moines, Iowa NERFINISHED ⓘ |
| waterBodyCreated | Saylorville Lake 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: Saylorville Dam Description of subject: Saylorville Dam is a large flood-control and recreation dam on the Des Moines River in central Iowa, forming Saylorville Lake just upstream of Des Moines.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.