Union Pacific Moffat Subdivision
E488666
The Union Pacific Moffat Subdivision is a major railroad line in Colorado that carries freight and passenger trains through the Rocky Mountains via the historic Moffat Tunnel and surrounding mountain passes.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Denver and Salt Lake Railway | 1 |
| Union Pacific Moffat Subdivision canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5036827 — 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: Union Pacific Moffat Subdivision Context triple: [Moffat Tunnel route, partOf, Union Pacific Moffat Subdivision]
-
A.
BNSF Scenic Subdivision
The BNSF Scenic Subdivision is a major BNSF Railway line through Washington state’s Cascade Mountains, known for its steep grades, tunnels, and use by both freight and passenger trains.
-
B.
BNSF Railway Monticello Subdivision
The BNSF Railway Monticello Subdivision is a freight and passenger rail corridor in Minnesota that carries BNSF trains as well as Metro Transit's Northstar commuter rail service between Minneapolis and its northwestern suburbs.
-
C.
Union Pacific Railroad Mojave Subdivision
The Union Pacific Railroad Mojave Subdivision is a freight rail line in Southern California that runs through the Mojave Desert, serving as a key east–west corridor for Union Pacific’s operations in the region.
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D.
Union Pacific West Line
The Union Pacific West Line is a commuter rail route in the Chicago metropolitan area that runs between downtown Chicago and western suburbs, providing daily passenger service as part of the Metra system.
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E.
Union Pacific Railroad Niles Subdivision
The Union Pacific Railroad Niles Subdivision is a freight and passenger rail corridor in California’s East Bay and Tri-Valley region that carries both Union Pacific trains and commuter services such as the Altamont Corridor Express.
- 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: Union Pacific Moffat Subdivision Target entity description: The Union Pacific Moffat Subdivision is a major railroad line in Colorado that carries freight and passenger trains through the Rocky Mountains via the historic Moffat Tunnel and surrounding mountain passes.
-
A.
BNSF Scenic Subdivision
The BNSF Scenic Subdivision is a major BNSF Railway line through Washington state’s Cascade Mountains, known for its steep grades, tunnels, and use by both freight and passenger trains.
-
B.
BNSF Railway Monticello Subdivision
The BNSF Railway Monticello Subdivision is a freight and passenger rail corridor in Minnesota that carries BNSF trains as well as Metro Transit's Northstar commuter rail service between Minneapolis and its northwestern suburbs.
-
C.
Union Pacific Railroad Mojave Subdivision
The Union Pacific Railroad Mojave Subdivision is a freight rail line in Southern California that runs through the Mojave Desert, serving as a key east–west corridor for Union Pacific’s operations in the region.
-
D.
Union Pacific West Line
The Union Pacific West Line is a commuter rail route in the Chicago metropolitan area that runs between downtown Chicago and western suburbs, providing daily passenger service as part of the Metra system.
-
E.
Union Pacific Railroad Niles Subdivision
The Union Pacific Railroad Niles Subdivision is a freight and passenger rail corridor in California’s East Bay and Tri-Valley region that carries both Union Pacific trains and commuter services such as the Altamont Corridor Express.
- F. None of above. chosen
Statements (38)
| Predicate | Object |
|---|---|
| instanceOf |
railroad line
ⓘ
railway subdivision ⓘ |
| alsoUsedFor | passenger rail service ⓘ |
| connects |
Denver area
ⓘ
western Colorado and points west ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| electrification | not electrified ⓘ |
| engineeringChallenge |
harsh winter weather
ⓘ
high elevation ⓘ |
| freightOperator | Union Pacific Railroad NERFINISHED ⓘ |
| geographicFeature | Continental Divide NERFINISHED ⓘ |
| historicalPredecessor |
Denver and Rio Grande Western Railroad Moffat Route
NERFINISHED
ⓘ
Denver and Salt Lake Railway main line NERFINISHED ⓘ |
| historicalSignificance | key mountain crossing route in Colorado rail history ⓘ |
| hostsService | Amtrak California Zephyr NERFINISHED ⓘ |
| includesStructure | Moffat Tunnel NERFINISHED ⓘ |
| locatedIn | Colorado ⓘ |
| namedAfter | Moffat Tunnel NERFINISHED ⓘ |
| notableFeature |
numerous curves and tunnels
ⓘ
steep mountain grades ⓘ |
| operator | Union Pacific Railroad NERFINISHED ⓘ |
| partOf | Union Pacific Railroad network NERFINISHED ⓘ |
| partOfCorridor | transcontinental rail route across the Rockies ⓘ |
| passengerOperator | Amtrak NERFINISHED ⓘ |
| passesThrough |
Moffat Tunnel route under the Continental Divide
NERFINISHED
ⓘ
Rocky Mountains NERFINISHED ⓘ |
| primaryUse | freight rail service ⓘ |
| railGauge | standard gauge ⓘ |
| railroadDivision | part of Union Pacific’s Colorado operations ⓘ |
| region | northern Colorado NERFINISHED ⓘ |
| safetySystem | wayside signals ⓘ |
| terrain | mountainous ⓘ |
| trackConfiguration | primarily single track with sidings ⓘ |
| trafficType |
bulk commodities
ⓘ
intermodal freight ⓘ manifest freight ⓘ |
| traverses | Front Range of the Rocky Mountains NERFINISHED ⓘ |
| usesTunnel | Moffat Tunnel 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: Union Pacific Moffat Subdivision Description of subject: The Union Pacific Moffat Subdivision is a major railroad line in Colorado that carries freight and passenger trains through the Rocky Mountains via the historic Moffat Tunnel and surrounding mountain passes.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Denver and Salt Lake Railway