Spiral Tunnels
E801849
Spiral Tunnels are a pair of ingeniously engineered railway tunnels in British Columbia’s Kicking Horse Pass that use spiral loops to reduce steep grades and safely carry trains through the Rocky Mountains.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Spiral Tunnels canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9490895 — 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: Spiral Tunnels Context triple: [Canadian Pacific Railway, notableStructure, Spiral Tunnels]
-
A.
Sun Tunnels
Sun Tunnels is a monumental Land Art installation by Nancy Holt in Utah’s Great Basin Desert, consisting of four massive concrete tubes aligned with the solstices and drilled with star patterns.
-
B.
Spiralen tunnel and viewpoint
Spiralen tunnel and viewpoint is a helical road tunnel and popular scenic overlook in Drammen, Norway, offering panoramic views of the city and surrounding landscape.
-
C.
the Tunnels
The Tunnels are an underground, hidden community beneath New York City where outcasts live in secrecy and form a close-knit, almost mythic society in the TV series "Beauty and the Beast."
-
D.
Tar Tunnel
Tar Tunnel is a historic 18th-century industrial tunnel in Ironbridge Gorge, England, known for its natural bitumen seepage and role in the early Industrial Revolution.
-
E.
Box Tunnel
Box Tunnel is a historic railway tunnel in Wiltshire, England, engineered by Isambard Kingdom Brunel as part of the Great Western Railway and renowned for its ambitious 19th-century design and construction.
- 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: Spiral Tunnels Target entity description: Spiral Tunnels are a pair of ingeniously engineered railway tunnels in British Columbia’s Kicking Horse Pass that use spiral loops to reduce steep grades and safely carry trains through the Rocky Mountains.
-
A.
Sun Tunnels
Sun Tunnels is a monumental Land Art installation by Nancy Holt in Utah’s Great Basin Desert, consisting of four massive concrete tubes aligned with the solstices and drilled with star patterns.
-
B.
Spiralen tunnel and viewpoint
Spiralen tunnel and viewpoint is a helical road tunnel and popular scenic overlook in Drammen, Norway, offering panoramic views of the city and surrounding landscape.
-
C.
the Tunnels
The Tunnels are an underground, hidden community beneath New York City where outcasts live in secrecy and form a close-knit, almost mythic society in the TV series "Beauty and the Beast."
-
D.
Tar Tunnel
Tar Tunnel is a historic 18th-century industrial tunnel in Ironbridge Gorge, England, known for its natural bitumen seepage and role in the early Industrial Revolution.
-
E.
Box Tunnel
Box Tunnel is a historic railway tunnel in Wiltshire, England, engineered by Isambard Kingdom Brunel as part of the Great Western Railway and renowned for its ambitious 19th-century design and construction.
- F. None of above. chosen
Statements (37)
| Predicate | Object |
|---|---|
| instanceOf |
civil engineering structure
ⓘ
railway tunnel system ⓘ |
| constructedBy | Canadian Pacific Railway NERFINISHED ⓘ |
| country | Canada ⓘ |
| crosses | Continental Divide region (nearby) ⓘ |
| hasPart |
Lower Spiral Tunnel
NERFINISHED
ⓘ
Upper Spiral Tunnel NERFINISHED ⓘ |
| hasViewpoint | Spiral Tunnels viewpoint on Trans-Canada Highway NERFINISHED ⓘ |
| heritageStatus | historic railway engineering site ⓘ |
| locatedIn |
British Columbia
ⓘ
Canadian Rockies NERFINISHED ⓘ Kicking Horse Pass NERFINISHED ⓘ |
| locatedInPass | Kicking Horse Pass NERFINISHED ⓘ |
| locatedInProvince | British Columbia NERFINISHED ⓘ |
| locatedNear |
Field, British Columbia
NERFINISHED
ⓘ
Yoho National Park NERFINISHED ⓘ |
| locatedOnLine | Canadian Pacific Railway main line NERFINISHED ⓘ |
| material | rock ⓘ |
| maximumGradeAfterConstruction | approximately 2.2 percent ⓘ |
| notableFor |
iconic mountain railway engineering in Canada
ⓘ
reducing steep grades with spiral loops ⓘ |
| numberOfTunnels | 2 ⓘ |
| opened | 1909 ⓘ |
| operatedBy | Canadian Pacific Railway NERFINISHED ⓘ |
| owner | Canadian Pacific Railway NERFINISHED ⓘ |
| previousMaximumGrade | approximately 4.5 percent ⓘ |
| purpose |
allow heavier trains through the Rocky Mountains
ⓘ
increase train safety ⓘ reduce railway grade through Kicking Horse Pass ⓘ |
| region | Rocky Mountains NERFINISHED ⓘ |
| replaced | Kicking Horse Pass "Big Hill" route NERFINISHED ⓘ |
| status | in use ⓘ |
| trackGauge | standard gauge ⓘ |
| usedFor |
freight trains
ⓘ
passenger trains ⓘ |
| usesDesign | spiral loop tunnel ⓘ |
| visibleFrom | Trans-Canada Highway 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: Spiral Tunnels Description of subject: Spiral Tunnels are a pair of ingeniously engineered railway tunnels in British Columbia’s Kicking Horse Pass that use spiral loops to reduce steep grades and safely carry trains through the Rocky Mountains.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.