Kennedy Mine
E257372
Kennedy Mine is a historic hard-rock gold mine in California that was once one of the deepest and most productive gold mines in North America.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Kennedy Mine canonical | 9 |
| Kennedy Gold Mine | 2 |
| Kennedy Mine Foundation | 1 |
| Kennedy Mine tailings disposal system | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2333530 — 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: Kennedy Mine Context triple: [Sutter Creek, hasNearbyMine, Kennedy Mine]
-
A.
North Star Mine
North Star Mine is a historic gold mine and landmark in Grass Valley, California, that played a significant role in the region’s 19th- and early 20th-century mining industry.
-
B.
El Teniente mine
El Teniente mine is one of the world’s largest underground copper mines, located in central Chile and operated by the state-owned company Codelco.
-
C.
Quincy Mine
Quincy Mine is a historic copper mining complex in Michigan’s Keweenaw Peninsula, preserved today as a major heritage and tourism site showcasing the region’s mining history.
-
D.
Tioga Mine
Tioga Mine was a historic silver mining operation in the Sierra Nevada of California that gave its name to nearby Tioga Pass.
-
E.
Geita Gold Mine
Geita Gold Mine is one of Tanzania’s largest open-pit gold mines, operated by AngloGold Ashanti and located near the town of Geita in the country’s northwest.
- 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: Kennedy Mine Target entity description: Kennedy Mine is a historic hard-rock gold mine in California that was once one of the deepest and most productive gold mines in North America.
-
A.
North Star Mine
North Star Mine is a historic gold mine and landmark in Grass Valley, California, that played a significant role in the region’s 19th- and early 20th-century mining industry.
-
B.
El Teniente mine
El Teniente mine is one of the world’s largest underground copper mines, located in central Chile and operated by the state-owned company Codelco.
-
C.
Quincy Mine
Quincy Mine is a historic copper mining complex in Michigan’s Keweenaw Peninsula, preserved today as a major heritage and tourism site showcasing the region’s mining history.
-
D.
Tioga Mine
Tioga Mine was a historic silver mining operation in the Sierra Nevada of California that gave its name to nearby Tioga Pass.
-
E.
Geita Gold Mine
Geita Gold Mine is one of Tanzania’s largest open-pit gold mines, operated by AngloGold Ashanti and located near the town of Geita in the country’s northwest.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
gold mine
ⓘ
hard-rock mine ⓘ historic site ⓘ |
| adjacentTo | Kennedy Mine Tailing Wheel Park ⓘ |
| architecturalStyle | industrial mining structures ⓘ |
| CaliforniaHistoricalLandmarkNumber | 786 ⓘ |
| closingDate | 1942 ⓘ |
| continent | North America ⓘ |
| coordinateLocation | approximately 38.27°N 120.77°W ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| currentUse |
museum site
ⓘ
tourist attraction ⓘ |
| depth |
about 1802 meters
ⓘ
approximately 5912 feet ⓘ |
| environmentalImpact | mine tailings accumulation ⓘ |
| hasHeritageStatus | historic mining site ⓘ |
| hasPart | Kennedy Tailing Wheels ⓘ |
| heritageDesignation | California Historical Landmark ⓘ |
| inception | 1860s ⓘ |
| industry | gold mining industry ⓘ |
| locatedIn |
California
ⓘ
linked to:
California, United States
Jackson, California ⓘ Sierra Nevada foothills ⓘ |
| locatedInAdministrativeTerritorialEntity | Amador County, California ⓘ |
| locatedNear | Jackson Gate, California ⓘ |
| mineralExtracted | gold ⓘ |
| namedAfter | Andrew Kennedy ⓘ |
| notableFor |
being one of the deepest gold mines in North America
ⓘ
being one of the most productive gold mines in North America ⓘ |
| openingDate | 1860 ⓘ |
| oreProcessingMethod |
amalgamation plates
ⓘ
stamp mill ⓘ |
| owner |
Kennedy Mine Foundation
ⓘ
linked to:
Kennedy Mine
|
| partOf | California Gold Country ⓘ |
| product | gold ⓘ |
| region | Mother Lode region ⓘ |
| shutdownCause | World War II gold mining shutdown order ⓘ |
| significantEvent | development of deep hard-rock mining in California ⓘ |
| significantPeriod |
California Gold Rush era
ⓘ
linked to:
California Gold Rush
|
| status | inactive mine ⓘ |
| touristActivity |
educational programs
ⓘ
guided tours ⓘ |
| transportUsed | shaft hoisting system ⓘ |
| visitorFacility |
interpretive trails
ⓘ
visitor center ⓘ |
| workPeriod |
early 20th century
ⓘ
late 19th century ⓘ |
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: Kennedy Mine Description of subject: Kennedy Mine is a historic hard-rock gold mine in California that was once one of the deepest and most productive gold mines in North America.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Kennedy Mine
linked to: Kennedy Mine
linked to: Kennedy Mine
linked to: Kennedy Mine