Boulder Dam on Bear Creek
E899574
Boulder Dam on Bear Creek is the structure that impounds Bear Creek in California’s San Bernardino Mountains to form Big Bear Lake, a popular alpine reservoir and recreation area.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Boulder Dam on Bear Creek canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11012388 — 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: Boulder Dam on Bear Creek Context triple: [Big Bear Lake, createdBy, Boulder Dam on Bear Creek]
-
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.
Indian Valley Dam
Indian Valley Dam is an earth-fill embankment dam in Lake County, California, that creates Indian Valley Reservoir for water storage, flood control, and recreation along Cache Creek.
-
C.
Coolidge Dam
Coolidge Dam is a large concrete multiple-arch dam in Arizona that impounds the Gila River to form San Carlos Lake for irrigation, flood control, and water storage.
-
D.
Mormon Flat Dam
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.
-
E.
Round Butte Dam
Round Butte Dam is a hydroelectric dam on the Deschutes River in Oregon, known for creating Lake Billy Chinook and forming part of the Pelton Round Butte Project.
- 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: Boulder Dam on Bear Creek Target entity description: Boulder Dam on Bear Creek is the structure that impounds Bear Creek in California’s San Bernardino Mountains to form Big Bear Lake, a popular alpine reservoir and recreation area.
-
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.
Indian Valley Dam
Indian Valley Dam is an earth-fill embankment dam in Lake County, California, that creates Indian Valley Reservoir for water storage, flood control, and recreation along Cache Creek.
-
C.
Coolidge Dam
Coolidge Dam is a large concrete multiple-arch dam in Arizona that impounds the Gila River to form San Carlos Lake for irrigation, flood control, and water storage.
-
D.
Mormon Flat Dam
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.
-
E.
Round Butte Dam
Round Butte Dam is a hydroelectric dam on the Deschutes River in Oregon, known for creating Lake Billy Chinook and forming part of the Pelton Round Butte Project.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
dam
ⓘ
gravity dam ⓘ |
| alsoKnownAs | Boulder Dam NERFINISHED ⓘ |
| basinCountry |
United States of America
ⓘ
surface form:
United States
|
| country |
United States of America
ⓘ
surface form:
United States
|
| creates | Big Bear Lake NERFINISHED ⓘ |
| elevation | approximately 2,060 meters above sea level ⓘ |
| formsReservoir | Big Bear Lake NERFINISHED ⓘ |
| hasPurpose |
flood control
ⓘ
hydroelectric power ⓘ recreation ⓘ water storage ⓘ |
| hasRecreationArea | Big Bear Lake recreation area NERFINISHED ⓘ |
| impounds | Bear Creek NERFINISHED ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
San Bernardino County ⓘ
surface form:
San Bernardino County, California
San Bernardino Mountains NERFINISHED ⓘ United States of America ⓘ
surface form:
United States
|
| locatedInProtectedArea | San Bernardino National Forest NERFINISHED ⓘ |
| locatedNear | Highway 18 in the San Bernardino Mountains NERFINISHED ⓘ |
| locatedOnWatercourse | Bear Creek NERFINISHED ⓘ |
| near |
Big Bear City, California
NERFINISHED
ⓘ
Big Bear Lake, California NERFINISHED ⓘ |
| operator | local water authorities of Big Bear area ⓘ |
| partOf | Big Bear Lake reservoir system NERFINISHED ⓘ |
| region | Southern California ⓘ |
| usedFor |
boating on Big Bear Lake
ⓘ
fishing on Big Bear Lake ⓘ tourism in the San Bernardino Mountains ⓘ |
| watershed | Santa Ana River basin 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: Boulder Dam on Bear Creek Description of subject: Boulder Dam on Bear Creek is the structure that impounds Bear Creek in California’s San Bernardino Mountains to form Big Bear Lake, a popular alpine reservoir and recreation area.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.