Moffat Tunnel
E489928
The Moffat Tunnel is a major railroad and water tunnel that cuts through the Continental Divide in Colorado, providing a crucial transportation and utility link between the Denver area and the western slope of the Rocky Mountains.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Moffat Tunnel canonical | 3 |
| Moffat Tunnel Subdivision | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5036816 — 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: Moffat Tunnel Context triple: [Moffat Tunnel route, usesStructure, Moffat Tunnel]
-
A.
Malpas Tunnel
Malpas Tunnel is a historic canal tunnel in southern France, notable as one of the first navigable tunnels built for the Canal du Midi in the 17th century.
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B.
Caldecott Tunnel
The Caldecott Tunnel is a major highway tunnel in the San Francisco Bay Area that carries traffic through the Berkeley Hills between Oakland and Contra Costa County.
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C.
Cosgrove Tunnel
Cosgrove Tunnel is a major water-supply conduit in Massachusetts that carries drinking water from the Wachusett Reservoir toward the Boston metropolitan area.
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D.
Blisworth Tunnel
Blisworth Tunnel is one of the longest navigable canal tunnels in Britain, carrying the Grand Union Canal beneath the Northamptonshire countryside.
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E.
Braunston Tunnel
Braunston Tunnel is a long 19th-century canal tunnel in Northamptonshire, England, forming a key part of the historic Grand Union Canal 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: Moffat Tunnel Target entity description: The Moffat Tunnel is a major railroad and water tunnel that cuts through the Continental Divide in Colorado, providing a crucial transportation and utility link between the Denver area and the western slope of the Rocky Mountains.
-
A.
Malpas Tunnel
Malpas Tunnel is a historic canal tunnel in southern France, notable as one of the first navigable tunnels built for the Canal du Midi in the 17th century.
-
B.
Caldecott Tunnel
The Caldecott Tunnel is a major highway tunnel in the San Francisco Bay Area that carries traffic through the Berkeley Hills between Oakland and Contra Costa County.
-
C.
Cosgrove Tunnel
Cosgrove Tunnel is a major water-supply conduit in Massachusetts that carries drinking water from the Wachusett Reservoir toward the Boston metropolitan area.
-
D.
Blisworth Tunnel
Blisworth Tunnel is one of the longest navigable canal tunnels in Britain, carrying the Grand Union Canal beneath the Northamptonshire countryside.
-
E.
Braunston Tunnel
Braunston Tunnel is a long 19th-century canal tunnel in Northamptonshire, England, forming a key part of the historic Grand Union Canal route.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
railroad tunnel
ⓘ
transportation infrastructure ⓘ water tunnel ⓘ |
| associatedWith |
Denver and Rio Grande Western Railroad
NERFINISHED
ⓘ
Denver and Salt Lake Railway NERFINISHED ⓘ |
| carriesWaterFrom | Western Slope of Colorado ⓘ |
| carriesWaterTo | Denver metropolitan area NERFINISHED ⓘ |
| completionDate | 1927 ⓘ |
| connectsRegion |
Denver metropolitan area
NERFINISHED
ⓘ
Western Slope of Colorado ⓘ |
| constructionStartDate | 1923 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| crosses | Continental Divide of the Americas NERFINISHED ⓘ |
| electrification | not electrified ⓘ |
| elevationAtEastPortal | approximately 9,200 feet ⓘ |
| elevationAtWestPortal | approximately 9,100 feet ⓘ |
| engineeringSignificance | early 20th-century long mountain tunnel ⓘ |
| gauge | standard gauge ⓘ |
| hasComponent |
railroad bore
ⓘ
water bore ⓘ |
| hasEastPortalIn | near Rollinsville, Colorado ⓘ |
| hasParallelStructure | Moffat Tunnel water bore NERFINISHED ⓘ |
| hasWestPortalIn | near Winter Park, Colorado ⓘ |
| length |
approximately 10.0 kilometers
ⓘ
approximately 6.2 miles ⓘ |
| locatedIn | Colorado ⓘ |
| locatedInCounty |
Gilpin County, Colorado
NERFINISHED
ⓘ
Grand County, Colorado NERFINISHED ⓘ |
| locatedInMountainRange | Rocky Mountains NERFINISHED ⓘ |
| namedAfter | David Moffat NERFINISHED ⓘ |
| openedForRailTraffic | 1928 ⓘ |
| openingDate | 1928 ⓘ |
| operator | Union Pacific Railroad NERFINISHED ⓘ |
| ownedBy | Moffat Tunnel Improvement District NERFINISHED ⓘ |
| partOf | Denver water supply system ⓘ |
| passesUnder | James Peak NERFINISHED ⓘ |
| reducesTravelDistanceComparedTo | Rollins Pass route NERFINISHED ⓘ |
| reducesTravelTimeBetween | Denver and Western Slope NERFINISHED ⓘ |
| replaced | Denver and Salt Lake Railway Rollins Pass route NERFINISHED ⓘ |
| significance | major trans-Continental Divide rail link in Colorado ⓘ |
| status | in operation ⓘ |
| trackConfiguration | single track ⓘ |
| usedBy |
Amtrak California Zephyr
NERFINISHED
ⓘ
freight trains ⓘ |
| usedFor |
rail transportation
ⓘ
water conveyance ⓘ |
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: Moffat Tunnel Description of subject: The Moffat Tunnel is a major railroad and water tunnel that cuts through the Continental Divide in Colorado, providing a crucial transportation and utility link between the Denver area and the western slope of the Rocky Mountains.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Moffat Tunnel Subdivision