Marquam Bridge
E127630
The Marquam Bridge is a major double-decked freeway bridge in Portland, Oregon, carrying Interstate 5 across the Willamette River.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Marquam Bridge canonical | 8 |
| Willamette River bridges | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T605463 — 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: Marquam Bridge Context triple: [Willamette River, notableBridge, Marquam Bridge]
-
A.
Yaquina Bay Bridge
The Yaquina Bay Bridge is an iconic 1930s Art Deco–style arch bridge on the Oregon coast, renowned for its elegant design and role as a key crossing on U.S. Route 101.
-
B.
Lacey V. Murrow Memorial Bridge
The Lacey V. Murrow Memorial Bridge is a major floating bridge in Washington State that carries Interstate 90 across Lake Washington, connecting Seattle to its eastern suburbs.
-
C.
Fremont Bridge
The Fremont Bridge is a prominent tied-arch freeway bridge in Portland, Oregon, known for carrying Interstate 405 across the Willamette River and being one of the city's most recognizable landmarks.
-
D.
145th Street Bridge
The 145th Street Bridge is a swing bridge in New York City that carries vehicular and pedestrian traffic between Manhattan and the Bronx.
-
E.
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.
- 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: Marquam Bridge Target entity description: The Marquam Bridge is a major double-decked freeway bridge in Portland, Oregon, carrying Interstate 5 across the Willamette River.
-
A.
Yaquina Bay Bridge
The Yaquina Bay Bridge is an iconic 1930s Art Deco–style arch bridge on the Oregon coast, renowned for its elegant design and role as a key crossing on U.S. Route 101.
-
B.
Lacey V. Murrow Memorial Bridge
The Lacey V. Murrow Memorial Bridge is a major floating bridge in Washington State that carries Interstate 90 across Lake Washington, connecting Seattle to its eastern suburbs.
-
C.
Fremont Bridge
The Fremont Bridge is a prominent tied-arch freeway bridge in Portland, Oregon, known for carrying Interstate 405 across the Willamette River and being one of the city's most recognizable landmarks.
-
D.
145th Street Bridge
The 145th Street Bridge is a swing bridge in New York City that carries vehicular and pedestrian traffic between Manhattan and the Bronx.
-
E.
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.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
bridge
ⓘ
double-decked bridge ⓘ freeway bridge ⓘ steel cantilever bridge ⓘ |
| bypasses |
Portland central waterfront
ⓘ
linked to:
Willamette River waterfront
|
| carries |
I-5
ⓘ
linked to:
Interstate 5
Interstate 5 ⓘ |
| city |
Portland, Oregon
ⓘ
linked to:
Portland, Oregon, United States
|
| connects |
east bank of Willamette River in Portland
ⓘ
west bank of Willamette River in Portland ⓘ |
| constructionStart | 1961 ⓘ |
| coordinates | approximately 45.507°N 122.667°W ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| crosses | Willamette River ⓘ |
| crossesAt |
Willamette River in Portland, Oregon
ⓘ
linked to:
Willamette River
|
| crossesFeature |
Willamette River main channel
ⓘ
linked to:
Willamette River
|
| deckConfiguration | double-deck ⓘ |
| design | cantilever truss ⓘ |
| hasApproach | elevated freeway approaches on both sides ⓘ |
| hasDeck |
lower deck
ⓘ
upper deck ⓘ |
| lanes | 8 ⓘ |
| length |
approximately 2,808 feet
ⓘ
approximately 856 meters ⓘ |
| 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
|
| lowerDeckDirection | southbound ⓘ |
| maintainedBy | Oregon Department of Transportation ⓘ |
| name | Marquam Bridge ⓘ |
| namedAfter | Philip A. Marquam ⓘ |
| notableFor |
being one of the busiest bridges in Oregon
ⓘ
double-deck freeway configuration ⓘ |
| opened | 1966 ⓘ |
| owner | Oregon Department of Transportation ⓘ |
| partOf |
Interstate Highway System
ⓘ
Portland freeway network ⓘ
linked to:
Portland freeway system
|
| regionServed | Portland metropolitan area ⓘ |
| river | Willamette River ⓘ |
| state | Oregon ⓘ |
| structureMaterial | steel ⓘ |
| structureType | fixed bridge ⓘ |
| toll | no ⓘ |
| trafficType | motor vehicles ⓘ |
| upperDeckDirection | northbound ⓘ |
| width | approximately 82 feet ⓘ |
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: Marquam Bridge Description of subject: The Marquam Bridge is a major double-decked freeway bridge in Portland, Oregon, carrying Interstate 5 across the Willamette River.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Marquam Bridge