Pacific Extension
E612560
The Pacific Extension was the Milwaukee Road railroad’s ambitious early 20th-century transcontinental line that stretched from the Midwest to the Pacific Northwest before ultimately being abandoned.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Pacific Extension canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6692353 — 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: Pacific Extension Context triple: [Milwaukee Road, abandonedSegment, Pacific Extension]
-
A.
Cascadia
Cascadia is a bioregion and cultural concept in the Pacific Northwest that encompasses parts of the U.S. and Canadian west coast, known for its temperate rainforests, mountain ranges, and strong environmental identity.
-
B.
Pacific Shores
Pacific Shores is a marine-themed exhibit at the Oregon Zoo featuring coastal wildlife and habitats from the Pacific Ocean.
-
C.
Pacific Belt Zone
The Pacific Belt Zone is Japan’s main industrial and urban corridor stretching along the Pacific coast, concentrating much of the country’s manufacturing, infrastructure, and population.
-
D.
Pacific Rim of the Americas
The Pacific Rim of the Americas is the group of North, Central, and South American countries with coastlines on the Pacific Ocean, forming a key region for trans-Pacific trade and economic integration.
-
E.
Pacific Region
The Pacific Region is a regional office of the U.S. Bureau of Ocean Energy Management responsible for managing offshore energy and mineral resources along the Pacific coast.
- 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: Pacific Extension Target entity description: The Pacific Extension was the Milwaukee Road railroad’s ambitious early 20th-century transcontinental line that stretched from the Midwest to the Pacific Northwest before ultimately being abandoned.
-
A.
Cascadia
Cascadia is a bioregion and cultural concept in the Pacific Northwest that encompasses parts of the U.S. and Canadian west coast, known for its temperate rainforests, mountain ranges, and strong environmental identity.
-
B.
Pacific Shores
Pacific Shores is a marine-themed exhibit at the Oregon Zoo featuring coastal wildlife and habitats from the Pacific Ocean.
-
C.
Pacific Belt Zone
The Pacific Belt Zone is Japan’s main industrial and urban corridor stretching along the Pacific coast, concentrating much of the country’s manufacturing, infrastructure, and population.
-
D.
Pacific Rim of the Americas
The Pacific Rim of the Americas is the group of North, Central, and South American countries with coastlines on the Pacific Ocean, forming a key region for trans-Pacific trade and economic integration.
-
E.
Pacific Region
The Pacific Region is a regional office of the U.S. Bureau of Ocean Energy Management responsible for managing offshore energy and mineral resources along the Pacific coast.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
railway line
ⓘ
transcontinental railroad route ⓘ |
| abandonmentStart | 1970s ⓘ |
| alsoKnownAs | Milwaukee Road’s Coast Extension NERFINISHED ⓘ |
| builtBy | Chicago, Milwaukee and St. Paul Railway NERFINISHED ⓘ |
| completionDate | 1909 ⓘ |
| constructionStart | 1906 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| crosses |
Bitterroot Range
NERFINISHED
ⓘ
Cascade Range NERFINISHED ⓘ Rocky Mountains NERFINISHED ⓘ |
| declineFactors |
competition from other transcontinental railroads
ⓘ
high maintenance costs ⓘ loss of traffic to highways and pipelines ⓘ |
| electrification | yes ⓘ |
| electrificationEnd | 1974 ⓘ |
| electrificationStart | 1914 ⓘ |
| electrificationSystem | 3,000 V DC overhead line ⓘ |
| endPoint |
Portland, Oregon
NERFINISHED
ⓘ
Seattle, Washington NERFINISHED ⓘ Tacoma, Washington NERFINISHED ⓘ |
| finalAbandonmentDate | 1980 ⓘ |
| hasStructure |
Columbia River bridges
NERFINISHED
ⓘ
Snoqualmie Tunnel NERFINISHED ⓘ St. Paul Pass Tunnel NERFINISHED ⓘ |
| historicalSignificance |
example of early 20th-century large-scale railroad electrification
ⓘ
last major transcontinental railroad built in the contiguous United States ⓘ |
| knownFor | longest mainline railroad electrification in the United States at the time ⓘ |
| notableSegmentNow |
Iron Horse State Park trail
NERFINISHED
ⓘ
John Wayne Pioneer Trail NERFINISHED ⓘ Route of the Hiawatha Trail NERFINISHED ⓘ |
| openingDate | 1909 ⓘ |
| operatedBy | Chicago, Milwaukee, St. Paul and Pacific Railroad NERFINISHED ⓘ |
| operatorBankruptcy | Chicago, Milwaukee, St. Paul and Pacific Railroad bankruptcy of 1977 ⓘ |
| partOf | Chicago, Milwaukee, St. Paul and Pacific Railroad NERFINISHED ⓘ |
| passesThrough |
Idaho
NERFINISHED
ⓘ
Montana NERFINISHED ⓘ Oregon NERFINISHED ⓘ South Dakota NERFINISHED ⓘ Washington NERFINISHED ⓘ |
| peakEra | 1920s ⓘ |
| primaryPurpose |
passenger service between Midwest and Pacific Northwest
ⓘ
transcontinental freight service ⓘ |
| shortName | Milwaukee Road Pacific Extension NERFINISHED ⓘ |
| startPoint |
Mobridge, South Dakota
NERFINISHED
ⓘ
Twin Cities, Minnesota NERFINISHED ⓘ |
| successorUse |
rail trail corridors
ⓘ
state parks and recreational trails ⓘ |
| trafficType |
grain shipments
ⓘ
interchange traffic with western railroads ⓘ lumber and forest products ⓘ |
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: Pacific Extension Description of subject: The Pacific Extension was the Milwaukee Road railroad’s ambitious early 20th-century transcontinental line that stretched from the Midwest to the Pacific Northwest before ultimately being abandoned.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.