Rollins Reservoir
E657325
Rollins Reservoir is an artificial lake in the Sierra Nevada foothills of California, created by damming the Bear River for water storage, hydroelectric power, and recreation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Rollins Reservoir canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6947942 — 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: Rollins Reservoir Context triple: [Bear River (Feather River tributary), hasReservoir, Rollins Reservoir]
-
A.
La Grange Reservoir
La Grange Reservoir is a water storage body in California associated with La Grange Dam, used primarily for irrigation and regional water management.
-
B.
R. L. Harris Reservoir
R. L. Harris Reservoir is a man-made lake in east-central Alabama popular for fishing, boating, and other recreational activities.
-
C.
W. Kerr Scott Reservoir
W. Kerr Scott Reservoir is a man-made lake in North Carolina known for recreation such as boating, fishing, and camping, as well as flood control and water supply functions.
-
D.
Rhodeswood Reservoir
Rhodeswood Reservoir is a man-made water storage lake in the Longdendale valley of Derbyshire, England, forming part of the chain of reservoirs supplying water to the Greater Manchester area.
-
E.
Lafayette Reservoir
Lafayette Reservoir is a popular man-made lake and recreation area in Lafayette, California, known for its hiking trails, fishing, boating, and scenic picnic spots.
- 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: Rollins Reservoir Target entity description: Rollins Reservoir is an artificial lake in the Sierra Nevada foothills of California, created by damming the Bear River for water storage, hydroelectric power, and recreation.
-
A.
La Grange Reservoir
La Grange Reservoir is a water storage body in California associated with La Grange Dam, used primarily for irrigation and regional water management.
-
B.
R. L. Harris Reservoir
R. L. Harris Reservoir is a man-made lake in east-central Alabama popular for fishing, boating, and other recreational activities.
-
C.
W. Kerr Scott Reservoir
W. Kerr Scott Reservoir is a man-made lake in North Carolina known for recreation such as boating, fishing, and camping, as well as flood control and water supply functions.
-
D.
Rhodeswood Reservoir
Rhodeswood Reservoir is a man-made water storage lake in the Longdendale valley of Derbyshire, England, forming part of the chain of reservoirs supplying water to the Greater Manchester area.
-
E.
Lafayette Reservoir
Lafayette Reservoir is a popular man-made lake and recreation area in Lafayette, California, known for its hiking trails, fishing, boating, and scenic picnic spots.
- F. None of above. chosen
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf | reservoir ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| continent | North America ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| createdBy | Rollins Dam NERFINISHED ⓘ |
| hasCampground | Rollins Lake campgrounds ⓘ |
| hasDam | Rollins Dam NERFINISHED ⓘ |
| hasInflow | Bear River NERFINISHED ⓘ |
| hasOutflow | Bear River NERFINISHED ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
Nevada County, California NERFINISHED ⓘ Sierra Nevada foothills ⓘ |
| locatedOnRiver | Bear River NERFINISHED ⓘ |
| managingAgency | Nevada Irrigation District NERFINISHED ⓘ |
| nearCity |
Colfax, California
NERFINISHED
ⓘ
Grass Valley, California NERFINISHED ⓘ |
| operator | Nevada Irrigation District NERFINISHED ⓘ |
| partOf | Nevada Irrigation District water system NERFINISHED ⓘ |
| purpose |
hydroelectric power generation
ⓘ
recreation ⓘ water storage ⓘ |
| recreationalActivity |
boating
ⓘ
camping ⓘ fishing ⓘ swimming ⓘ water skiing ⓘ |
| region | Sierra Nevada, California NERFINISHED ⓘ |
| state |
California, United States
ⓘ
surface form:
California
|
| use |
irrigation water supply
ⓘ
municipal water supply ⓘ |
| watercourse | Bear 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: Rollins Reservoir Description of subject: Rollins Reservoir is an artificial lake in the Sierra Nevada foothills of California, created by damming the Bear River for water storage, hydroelectric power, and recreation.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Bear River (Feather River tributary)