Ross Island Bridge
E446045
The Ross Island Bridge is a cantilever truss bridge in Portland, Oregon, that carries U.S. Route 26 across the Willamette River.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Ross Island Bridge canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T2227740 — 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: Ross Island Bridge Context triple: [Portland bridge system, hasPart, Ross Island Bridge]
-
A.
St. Johns Bridge
St. Johns Bridge is a historic steel suspension bridge in Portland, Oregon, noted for its striking Gothic-style towers and scenic span over the Willamette River.
-
B.
Maurice J. Tobin Memorial Bridge
The Maurice J. Tobin Memorial Bridge is a major steel cantilever bridge in Boston, Massachusetts, carrying U.S. Route 1 over the Mystic River between Charlestown and Chelsea.
-
C.
Aurora Bridge
Aurora Bridge is a historic steel cantilever bridge in Seattle that carries State Route 99 over the Lake Union area, connecting the Queen Anne and Fremont neighborhoods.
-
D.
Glenn L. Jackson Memorial Bridge
The Glenn L. Jackson Memorial Bridge is a major concrete segmental bridge carrying traffic across the Columbia River between Oregon and Washington as part of the Portland metropolitan highway system.
-
E.
Theodore Roosevelt Bridge
The Theodore Roosevelt Bridge is a major highway bridge over the Potomac River in Washington, D.C., carrying traffic between the city and Arlington, Virginia.
- 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: Ross Island Bridge Target entity description: The Ross Island Bridge is a cantilever truss bridge in Portland, Oregon, that carries U.S. Route 26 across the Willamette River.
-
A.
St. Johns Bridge
St. Johns Bridge is a historic steel suspension bridge in Portland, Oregon, noted for its striking Gothic-style towers and scenic span over the Willamette River.
-
B.
Maurice J. Tobin Memorial Bridge
The Maurice J. Tobin Memorial Bridge is a major steel cantilever bridge in Boston, Massachusetts, carrying U.S. Route 1 over the Mystic River between Charlestown and Chelsea.
-
C.
Aurora Bridge
Aurora Bridge is a historic steel cantilever bridge in Seattle that carries State Route 99 over the Lake Union area, connecting the Queen Anne and Fremont neighborhoods.
-
D.
Glenn L. Jackson Memorial Bridge
The Glenn L. Jackson Memorial Bridge is a major concrete segmental bridge carrying traffic across the Columbia River between Oregon and Washington as part of the Portland metropolitan highway system.
-
E.
Theodore Roosevelt Bridge
The Theodore Roosevelt Bridge is a major highway bridge over the Potomac River in Washington, D.C., carrying traffic between the city and Arlington, Virginia.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
cantilever truss bridge
ⓘ
road bridge ⓘ steel bridge ⓘ |
| carries |
U.S. Route 26
NERFINISHED
ⓘ
bicycles ⓘ motor vehicles ⓘ pedestrians ⓘ |
| connects |
Southeast Portland
ⓘ
linked to:
Eastside Portland
Southwest Portland ⓘ
linked to:
Westside of Portland
|
| constructionCompleted | 1926 ⓘ |
| crosses | Willamette River ⓘ |
| crossesBetween |
east bank of Willamette River in southeast Portland
ⓘ
west bank of Willamette River in southwest Portland ⓘ |
| crossesNear | Ross Island ⓘ |
| designedBy | Gustav Lindenthal ⓘ |
| hasApproachRoad |
Naito Parkway vicinity on west side
ⓘ
Powell Boulevard (U.S. 26) on east side ⓘ
linked to:
SE Powell Boulevard
|
| hasClearanceBelow | sufficient for river traffic on Willamette River ⓘ |
| hasDeckType | roadway deck ⓘ |
| hasDesign | cantilever truss ⓘ |
| hasFunction | urban river crossing ⓘ |
| hasJurisdiction |
State of Oregon
ⓘ
linked to:
Oregon
|
| hasLocale | Pacific Northwest ⓘ |
| hasMainSpanLength | 535 feet ⓘ |
| hasMaterial | steel ⓘ |
| hasNumberOfSpans | 3 ⓘ |
| hasRegionServed | Portland metropolitan area ⓘ |
| hasStructureType | continuous truss with cantilevered spans ⓘ |
| hasToll | no ⓘ |
| hasTotalLength | approximately 3,700 feet ⓘ |
| hasTrafficDirection | bidirectional ⓘ |
| hasUsage |
commuter traffic
ⓘ
freight traffic ⓘ |
| isOneOf | major Willamette River bridges in Portland ⓘ |
| isOnWaterway | Willamette River navigation channel ⓘ |
| isPartOfRoute |
Mount Hood Highway (U.S. 26) corridor through Portland
ⓘ
linked to:
U.S. Route 26 in Oregon
|
| locatedIn |
Multnomah County, Oregon
ⓘ
linked to:
Multnomah County
Oregon ⓘ Portland, Oregon ⓘ
linked to:
Portland, Oregon, United States
United States ⓘ
linked to:
United States of America
|
| maintainedBy | Oregon Department of Transportation ⓘ |
| namedAfter | Ross Island ⓘ |
| opened | 1926 ⓘ |
| ownedBy |
State of Oregon
ⓘ
linked to:
Oregon
|
| partOf |
Portland metropolitan road network
ⓘ
U.S. Highway System ⓘ
linked to:
United States Numbered Highway System
|
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: Ross Island Bridge Description of subject: The Ross Island Bridge is a cantilever truss bridge in Portland, Oregon, that carries U.S. Route 26 across the Willamette River.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.