Stampede Tunnel
E618677
Stampede Tunnel is a historic railroad tunnel driven through Washington State’s Cascade Range that enabled the Northern Pacific Railway to complete a direct transcontinental route to the Pacific Northwest.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Stampede Tunnel canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6759398 — 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: Stampede Tunnel Context triple: [Northern Pacific Railway, notableStructure, Stampede Tunnel]
-
A.
Robertson Tunnel
Robertson Tunnel is a major light rail tunnel in Portland, Oregon, carrying MAX trains through the West Hills between downtown and the city’s western suburbs.
-
B.
Yellowhead Pass
Yellowhead Pass is a major mountain pass in the Canadian Rockies that serves as a key transportation corridor between Alberta and British Columbia.
-
C.
Bopeep Tunnel
Bopeep Tunnel is a railway tunnel in East Sussex, England, carrying the Tonbridge–Hastings line through the coastal cliffs near St Leonards.
-
D.
Sunset Tunnel
Sunset Tunnel is a rail tunnel in San Francisco that carries Muni Metro light rail trains beneath the hilly terrain between the Duboce Triangle and Inner Sunset neighborhoods.
-
E.
Bosley Tunnel
Bosley Tunnel is a historic narrowboat canal tunnel in Cheshire, England, forming part of the Macclesfield Canal navigation route.
- 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: Stampede Tunnel Target entity description: Stampede Tunnel is a historic railroad tunnel driven through Washington State’s Cascade Range that enabled the Northern Pacific Railway to complete a direct transcontinental route to the Pacific Northwest.
-
A.
Robertson Tunnel
Robertson Tunnel is a major light rail tunnel in Portland, Oregon, carrying MAX trains through the West Hills between downtown and the city’s western suburbs.
-
B.
Yellowhead Pass
Yellowhead Pass is a major mountain pass in the Canadian Rockies that serves as a key transportation corridor between Alberta and British Columbia.
-
C.
Bopeep Tunnel
Bopeep Tunnel is a railway tunnel in East Sussex, England, carrying the Tonbridge–Hastings line through the coastal cliffs near St Leonards.
-
D.
Sunset Tunnel
Sunset Tunnel is a rail tunnel in San Francisco that carries Muni Metro light rail trains beneath the hilly terrain between the Duboce Triangle and Inner Sunset neighborhoods.
-
E.
Bosley Tunnel
Bosley Tunnel is a historic narrowboat canal tunnel in Cheshire, England, forming part of the Macclesfield Canal navigation route.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
railroad tunnel
ⓘ
railway infrastructure ⓘ |
| builtBy |
Northern Pacific Railway contractors
ⓘ
linked to:
Northern Pacific Railway
|
| builtFor | Northern Pacific Railway ⓘ |
| connectedTo | transcontinental rail network ⓘ |
| constructionMaterial | rock and masonry lining ⓘ |
| constructionMethod | driven through rock of the Cascade Range ⓘ |
| constructionStart | 1884 ⓘ |
| continent | North America ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| crosses |
Cascade Range divide
ⓘ
linked to:
Cascade Range
|
| currentOperator | BNSF Railway ⓘ |
| engineeringType | single‑track tunnel ⓘ |
| function | mountain crossing for rail traffic ⓘ |
| gauge | standard gauge ⓘ |
| hasTrackConfiguration | single track ⓘ |
| hasVentilation | mechanical ventilation systems ⓘ |
| historicalEra | late 19th century railroad expansion ⓘ |
| historicSignificance |
enabled direct transcontinental rail route to the Pacific Northwest
ⓘ
key link in Northern Pacific Railway’s transcontinental route ⓘ |
| importance | major east–west freight corridor through Washington Cascades ⓘ |
| isHistoric | true ⓘ |
| isInfrastructureType | rail tunnel ⓘ |
| isPartOf |
Pacific Northwest rail corridor
ⓘ
linked to:
Chicago–Pacific Northwest rail corridor
|
| length |
approximately 1.9 miles
ⓘ
approximately 3.1 kilometers ⓘ |
| locatedIn |
Cascade Range
ⓘ
Washington State ⓘ
linked to:
Washington
|
| mountainRange | Cascade Range ⓘ |
| namedAfter | Stampede Pass ⓘ |
| near | Stampede Pass ⓘ |
| opened | 1888 ⓘ |
| openedForService | May 1888 ⓘ |
| originalOperator | Northern Pacific Railway ⓘ |
| owner | BNSF Railway ⓘ |
| partOf |
Northern Pacific Railway main line
ⓘ
linked to:
Northern Pacific Railway
|
| passesUnder | Stampede Pass area of the Cascades ⓘ |
| purpose | to avoid steep grades over Stampede Pass ⓘ |
| railLine | Stampede Pass line ⓘ |
| railroadCompletedVia |
Northern Pacific transcontinental route
ⓘ
linked to:
Northern Pacific Railway
|
| regionServed | Pacific Northwest ⓘ |
| significanceToRegion | improved rail access to Puget Sound ports ⓘ |
| state | Washington ⓘ |
| status | active railroad tunnel ⓘ |
| traffic | freight trains ⓘ |
| transportMode | rail ⓘ |
| use | rail transport ⓘ |
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: Stampede Tunnel Description of subject: Stampede Tunnel is a historic railroad tunnel driven through Washington State’s Cascade Range that enabled the Northern Pacific Railway to complete a direct transcontinental route to the Pacific Northwest.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.