Usibelli Coal Mine
E693842
Usibelli Coal Mine is Alaska’s largest coal mining operation, known for supplying coal to local power plants and for export from its surface mines near Healy.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Usibelli Coal Mine canonical | 2 |
| Usibelli Coal Mine, Inc. | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T7791371 — 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: Usibelli Coal Mine Context triple: [Healy, Alaska, hasNearbyFacility, Usibelli Coal Mine]
-
A.
Andoom Mine
Andoom Mine is a major bauxite mining operation near Weipa in Queensland, Australia, contributing significantly to the region’s aluminum ore production.
-
B.
Amrun Mine
Amrun Mine is a major bauxite mining operation in northern Queensland, Australia, developed by Rio Tinto as part of the broader Weipa mining region.
-
C.
Los Pelambres mine
Los Pelambres mine is a large open-pit copper and molybdenum mining operation located in the Coquimbo Region of Chile and operated by Antofagasta plc.
-
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.
South Field lignite mine
The South Field lignite mine is a major open-pit coal mining operation in the Kozani regional unit of Greece, supporting nearby power plants and regional energy production.
- 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: Usibelli Coal Mine Target entity description: Usibelli Coal Mine is Alaska’s largest coal mining operation, known for supplying coal to local power plants and for export from its surface mines near Healy.
-
A.
Andoom Mine
Andoom Mine is a major bauxite mining operation near Weipa in Queensland, Australia, contributing significantly to the region’s aluminum ore production.
-
B.
Amrun Mine
Amrun Mine is a major bauxite mining operation in northern Queensland, Australia, developed by Rio Tinto as part of the broader Weipa mining region.
-
C.
Los Pelambres mine
Los Pelambres mine is a large open-pit copper and molybdenum mining operation located in the Coquimbo Region of Chile and operated by Antofagasta plc.
-
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.
South Field lignite mine
The South Field lignite mine is a major open-pit coal mining operation in the Kozani regional unit of Greece, supporting nearby power plants and regional energy production.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
coal mining company
ⓘ
surface coal mine ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| employs | hundreds of workers ⓘ |
| energySector | electric power generation fuel supplier ⓘ |
| exportsVia | Port of Seward ⓘ |
| focusesOn | supplying low-sulfur coal ⓘ |
| foundedBy | Emil Usibelli ⓘ |
| fuelType | sub-bituminous coal ⓘ |
| hasAbbreviation | UCM ⓘ |
| hasCoalReserves | Healy coal field ⓘ |
| hasCommunityProgram | philanthropic support in Alaska communities ⓘ |
| hasEnvironmentalProgram |
land reclamation
ⓘ
revegetation of mined lands ⓘ |
| hasLogo | Usibelli Coal Mine corporate logo ⓘ |
| hasMiningSiteNear | Healy, Alaska ⓘ |
| hasSubsidiary | Aurora Energy Services ⓘ |
| hasType | privately held company ⓘ |
| headquartersLocation | Healy, Alaska ⓘ |
| inception | 1943 ⓘ |
| industry | coal mining ⓘ |
| knownFor |
being Alaska’s largest coal mining operation
ⓘ
exporting coal through the Port of Seward ⓘ supplying coal to local power plants in Alaska ⓘ |
| locatedIn |
Denali Borough, Alaska
ⓘ
linked to:
Denali Borough
Healy, Alaska ⓘ Interior Alaska ⓘ |
| locatedNear | Denali National Park and Preserve ⓘ |
| miningMethod | surface mining ⓘ |
| operates | multiple surface mine pits near Healy ⓘ |
| operatesIn | Healy area coal leases ⓘ |
| ownedBy | Usibelli family ⓘ |
| parentCompany |
Usibelli Coal Mine, Inc.
ⓘ
linked to:
Usibelli Coal Mine
|
| product | coal ⓘ |
| railConnection | Alaska Railroad ⓘ |
| railLoadingFacility | Healy rail loadout ⓘ |
| regionServed |
Interior Alaska
ⓘ
Southcentral Alaska ⓘ |
| safetyFocus | mine safety and training programs ⓘ |
| shipsTo |
domestic customers in Alaska
ⓘ
international coal markets ⓘ |
| state | Alaska ⓘ |
| supplies |
Golden Valley Electric Association power plants
ⓘ
linked to:
Healy Power Plant
University of Alaska Fairbanks power plant ⓘ military installations in Interior Alaska ⓘ |
| transportMode |
rail
ⓘ
truck ⓘ |
| website | https://www.usibelli.com/ ⓘ |
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: Usibelli Coal Mine Description of subject: Usibelli Coal Mine is Alaska’s largest coal mining operation, known for supplying coal to local power plants and for export from its surface mines near Healy.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Usibelli Coal Mine
linked to: Usibelli Coal Mine