Tehachapi Loop
E637893
Tehachapi Loop is a famous spiral railway line in California where trains loop over themselves to efficiently gain elevation through the Tehachapi Mountains.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Tehachapi Loop canonical | 3 |
| Tehachapi Spiral | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7058149 — 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: Tehachapi Loop Context triple: [Tehachapi Pass, hasRailFeature, Tehachapi Loop]
-
A.
Sherman Pass Road
Sherman Pass Road is a high-elevation scenic mountain roadway in Washington State that traverses the Kettle River Range and offers access to outdoor recreation and panoramic views.
-
B.
Camel’s Back Road
Camel’s Back Road is a scenic walking and driving route in Mussoorie, India, known for its camel-shaped rock formation, panoramic Himalayan views, and popular sunset and nature walks.
-
C.
Rich Mountain Loop
Rich Mountain Loop is a popular hiking trail in Great Smoky Mountains National Park known for its scenic views over Cades Cove, wildflowers, and moderate backcountry experience.
-
D.
Newhall Pass
Newhall Pass is a major mountain pass in Los Angeles County, California, that serves as a key transportation corridor connecting the San Fernando Valley with the Santa Clarita Valley.
-
E.
High Trestle Trail
High Trestle Trail is a popular Iowa recreational trail best known for its striking, artfully lit High Trestle Bridge spanning the Des Moines River.
- 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: Tehachapi Loop Target entity description: Tehachapi Loop is a famous spiral railway line in California where trains loop over themselves to efficiently gain elevation through the Tehachapi Mountains.
-
A.
Sherman Pass Road
Sherman Pass Road is a high-elevation scenic mountain roadway in Washington State that traverses the Kettle River Range and offers access to outdoor recreation and panoramic views.
-
B.
Camel’s Back Road
Camel’s Back Road is a scenic walking and driving route in Mussoorie, India, known for its camel-shaped rock formation, panoramic Himalayan views, and popular sunset and nature walks.
-
C.
Rich Mountain Loop
Rich Mountain Loop is a popular hiking trail in Great Smoky Mountains National Park known for its scenic views over Cades Cove, wildflowers, and moderate backcountry experience.
-
D.
Newhall Pass
Newhall Pass is a major mountain pass in Los Angeles County, California, that serves as a key transportation corridor connecting the San Fernando Valley with the Santa Clarita Valley.
-
E.
High Trestle Trail
High Trestle Trail is a popular Iowa recreational trail best known for its striking, artfully lit High Trestle Bridge spanning the Des Moines River.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
civil engineering structure
ⓘ
railway line feature ⓘ railway loop ⓘ |
| constructedBy | Southern Pacific Railroad ⓘ |
| crosses | itself via a grade-separated overpass ⓘ |
| designedBy | William Hood ⓘ |
| elevationGain | approximately 77 feet ⓘ |
| hasAlternativeName |
Tehachapi Spiral
ⓘ
linked to:
Tehachapi Loop
|
| hasDesign | single-track spiral loop ⓘ |
| hasFeature | overhead bridge where track crosses over itself ⓘ |
| hasFunction |
gain elevation efficiently
ⓘ
reduce track gradient ⓘ |
| hasHeritageStatus | California Historical Landmark ⓘ |
| hasMaximumGrade | about 2.2 percent ⓘ |
| hasMinimumRadius | approximately 1,200 feet ⓘ |
| hasShape | spiral ⓘ |
| hasStructure | tunnel at the lower end of the loop ⓘ |
| hasTraffic | one of the busiest single-track main lines in the world ⓘ |
| hasViewingArea | public viewpoints nearby ⓘ |
| isExampleOf |
mountain railway engineering
ⓘ
spiral railway ⓘ |
| isFamousFor |
heavy freight traffic
ⓘ
railfan photography ⓘ trains looping over themselves ⓘ |
| isOnRoute |
Bakersfield–Mojave line
ⓘ
linked to:
Union Pacific Railroad Mojave Subdivision
freight corridor between the San Joaquin Valley and the Mojave Desert ⓘ |
| length | approximately 0.73 miles ⓘ |
| locatedIn |
California
ⓘ
linked to:
California, United States
Kern County, California ⓘ
linked to:
Kern County
Tehachapi Mountains ⓘ Tehachapi Pass ⓘ United States ⓘ
linked to:
United States of America
|
| near |
city of Tehachapi, California
ⓘ
linked to:
Tehachapi, California
community of Keene, California ⓘ |
| opened | 1876 ⓘ |
| openedFor | rail traffic between San Joaquin Valley and Los Angeles Basin ⓘ |
| operatedBy | Union Pacific Railroad ⓘ |
| partOf |
Tehachapi Pass railroad line
ⓘ
linked to:
Tehachapi Pass
|
| recognizedAs | National Historic Civil Engineering Landmark ⓘ |
| recognizedBy | American Society of Civil Engineers ⓘ |
| status | in active use ⓘ |
| trackGauge | standard gauge ⓘ |
| usedBy |
BNSF Railway
ⓘ
freight trains ⓘ passenger trains ⓘ |
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: Tehachapi Loop Description of subject: Tehachapi Loop is a famous spiral railway line in California where trains loop over themselves to efficiently gain elevation through the Tehachapi Mountains.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Tehachapi Loop