Saylorville Lake
E863046
Saylorville Lake is a large man-made reservoir in central Iowa known for flood control, recreation, and wildlife habitat along the Des Moines River.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Saylorville Lake canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T7914535 — 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 Lake Context triple: [Des Moines River, hasReservoir, Saylorville Lake]
-
A.
Kanopolis Lake
Kanopolis Lake is a man-made reservoir in central Kansas known for its recreational opportunities, including boating, fishing, and hiking in the surrounding sandstone canyons and prairie.
-
B.
Coralville Lake
Coralville Lake is a reservoir in Iowa known for recreational activities and for exposing significant geological features such as the nearby Devonian Fossil Gorge.
-
C.
Smithville Lake
Smithville Lake is a large reservoir in Clay County, Missouri, popular for boating, fishing, camping, and other outdoor recreation.
-
D.
Lewis Smith Lake
Lewis Smith Lake is a large, deep reservoir in north-central Alabama known for its clear water, extensive shoreline, and popularity for boating, fishing, and lakeside recreation.
-
E.
Harlan County Lake
Harlan County Lake is a large reservoir in south-central Nebraska known for flood control, irrigation storage, and outdoor recreation such as fishing and boating.
- 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 Lake Target entity description: Saylorville Lake is a large man-made reservoir in central Iowa known for flood control, recreation, and wildlife habitat along the Des Moines River.
-
A.
Kanopolis Lake
Kanopolis Lake is a man-made reservoir in central Kansas known for its recreational opportunities, including boating, fishing, and hiking in the surrounding sandstone canyons and prairie.
-
B.
Coralville Lake
Coralville Lake is a reservoir in Iowa known for recreational activities and for exposing significant geological features such as the nearby Devonian Fossil Gorge.
-
C.
Smithville Lake
Smithville Lake is a large reservoir in Clay County, Missouri, popular for boating, fishing, camping, and other outdoor recreation.
-
D.
Lewis Smith Lake
Lewis Smith Lake is a large, deep reservoir in north-central Alabama known for its clear water, extensive shoreline, and popularity for boating, fishing, and lakeside recreation.
-
E.
Harlan County Lake
Harlan County Lake is a large reservoir in south-central Nebraska known for flood control, irrigation storage, and outdoor recreation such as fishing and boating.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
dam
ⓘ
flood control reservoir ⓘ reservoir ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| constructionStartDate | 1965 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
United States of America ⓘ
surface form:
United States
|
| createdBy | construction of Saylorville Dam ⓘ |
| hasDam | Saylorville Dam NERFINISHED ⓘ |
| hasFeature |
boat ramps
ⓘ
campgrounds ⓘ marinas ⓘ multi-use trails ⓘ picnic areas ⓘ |
| hasRecreationArea |
Bob Shetler Recreation Area
NERFINISHED
ⓘ
Cherry Glen Recreation Area NERFINISHED ⓘ Lakeview Recreation Area NERFINISHED ⓘ Oak Grove Recreation Area NERFINISHED ⓘ Prairie Flower Recreation Area NERFINISHED ⓘ |
| hasUse |
birdwatching
ⓘ
boating ⓘ camping ⓘ fishing ⓘ hunting ⓘ |
| hasWildlifeArea | Saylorville Lake Wildlife Management Area NERFINISHED ⓘ |
| impounds | Des Moines River NERFINISHED ⓘ |
| locatedIn |
Dallas County, Iowa
NERFINISHED
ⓘ
Iowa ⓘ Polk County, Iowa NERFINISHED ⓘ |
| locatedOnRiver |
Des Moines River
NERFINISHED
ⓘ
Des Moines River NERFINISHED ⓘ |
| managedBy | U.S. Army Corps of Engineers, Rock Island District NERFINISHED ⓘ |
| nearCity |
Ankeny, Iowa
NERFINISHED
ⓘ
Des Moines, Iowa NERFINISHED ⓘ Johnston, Iowa NERFINISHED ⓘ Polk City, Iowa NERFINISHED ⓘ |
| notableFor |
migratory bird habitat
ⓘ
periodic high water levels and flooding of surrounding areas ⓘ |
| openingDate | 1977 ⓘ |
| operator | U.S. Army Corps of Engineers NERFINISHED ⓘ |
| partOf |
Des Moines River basin
NERFINISHED
ⓘ
Mississippi River watershed ⓘ |
| purpose |
flood control
ⓘ
recreation ⓘ water storage ⓘ wildlife habitat ⓘ |
| region | central Iowa ⓘ |
| watercourse | Des Moines 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: Saylorville Lake Description of subject: Saylorville Lake is a large man-made reservoir in central Iowa known for flood control, recreation, and wildlife habitat along the Des Moines River.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Central Iowa