Casco Bay Bridge
E816680
The Casco Bay Bridge is a major bascule bridge in Portland, Maine, carrying U.S. Route 1 over the Fore River and serving as a key transportation link in the region.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Casco Bay Bridge canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T7021690 — 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: Casco Bay Bridge Context triple: [Fore River (Maine), hasBridge, Casco Bay Bridge]
-
A.
West Boston Bridge
West Boston Bridge was a 19th-century bridge over the Charles River in Boston that historically connected Boston to Cambridge before being superseded by the Longfellow Bridge.
-
B.
Mid-Bay Bridge
The Mid-Bay Bridge is a toll bridge in Florida that spans Choctawhatchee Bay, providing a direct north–south route between the city of Niceville and the Gulf Coast resort area near Destin.
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C.
Sakonnet River Bridge
The Sakonnet River Bridge is a highway bridge in eastern Rhode Island that carries traffic across the Sakonnet River between Aquidneck Island and the mainland.
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D.
Piscataqua River Bridge
The Piscataqua River Bridge is a major highway bridge carrying Interstate 95 over the Piscataqua River between Maine and New Hampshire in the northeastern United States.
-
E.
Manahawkin Bay Bridge
Manahawkin Bay Bridge is a causeway span in New Jersey that serves as the primary roadway link between the mainland and the resort community of Long Beach Island.
- 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: Casco Bay Bridge Target entity description: The Casco Bay Bridge is a major bascule bridge in Portland, Maine, carrying U.S. Route 1 over the Fore River and serving as a key transportation link in the region.
-
A.
West Boston Bridge
West Boston Bridge was a 19th-century bridge over the Charles River in Boston that historically connected Boston to Cambridge before being superseded by the Longfellow Bridge.
-
B.
Mid-Bay Bridge
The Mid-Bay Bridge is a toll bridge in Florida that spans Choctawhatchee Bay, providing a direct north–south route between the city of Niceville and the Gulf Coast resort area near Destin.
-
C.
Sakonnet River Bridge
The Sakonnet River Bridge is a highway bridge in eastern Rhode Island that carries traffic across the Sakonnet River between Aquidneck Island and the mainland.
-
D.
Piscataqua River Bridge
The Piscataqua River Bridge is a major highway bridge carrying Interstate 95 over the Piscataqua River between Maine and New Hampshire in the northeastern United States.
-
E.
Manahawkin Bay Bridge
Manahawkin Bay Bridge is a causeway span in New Jersey that serves as the primary roadway link between the mainland and the resort community of Long Beach Island.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
bascule bridge
ⓘ
road bridge ⓘ |
| allows | marine traffic passage when raised ⓘ |
| carries |
State Route 77
ⓘ
U.S. Route 1 ⓘ |
| connects |
Portland, Maine
ⓘ
South Portland, Maine ⓘ |
| constructionCompleted | 1997 ⓘ |
| crosses |
Fore River
ⓘ
linked to:
Fore River (Maine)
|
| function | key transportation link in the Portland region ⓘ |
| hasApproach |
Portland approach
ⓘ
South Portland approach ⓘ |
| hasBicycleAccess | yes ⓘ |
| hasClearanceWhenClosed | sufficient for many smaller vessels ⓘ |
| hasClearanceWhenOpen | allows passage of larger ships ⓘ |
| hasDesign | double-leaf bascule ⓘ |
| hasLanes | 4 ⓘ |
| hasMovableSpan | yes ⓘ |
| hasNavigationChannel | under bascule span ⓘ |
| hasNumberOfSpans | multiple ⓘ |
| hasSidewalks | yes ⓘ |
| hasToll | no ⓘ |
| isOnRoute |
State Route 77 corridor in Maine
ⓘ
U.S. Route 1 corridor in Maine ⓘ
linked to:
U.S. Route 1 in Maine
|
| locatedIn |
Cumberland County, Maine
ⓘ
Portland, Maine ⓘ United States ⓘ
linked to:
United States of America
|
| maintainedBy | Maine Department of Transportation ⓘ |
| namedAfter | Casco Bay ⓘ |
| openedForTraffic | 1997 ⓘ |
| partOf | regional transportation network of Greater Portland ⓘ |
| precededBy | Million Dollar Bridge ⓘ |
| regionServed |
Greater Portland metropolitan area
ⓘ
linked to:
Greater Portland, Maine
|
| replaced | Million Dollar Bridge ⓘ |
| riverMouthProximity | near mouth of Fore River into Casco Bay ⓘ |
| roadwayType | multi-lane highway bridge ⓘ |
| safetyImprovementOver | Million Dollar Bridge ⓘ |
| serves |
commercial traffic between Portland and South Portland
ⓘ
commuter traffic between Portland and South Portland ⓘ |
| strategicRole | primary crossing of Fore River for U.S. Route 1 in Portland area ⓘ |
| supports |
bicycles
ⓘ
motor vehicles ⓘ pedestrians ⓘ |
| trafficCapacityImprovementOver | Million Dollar Bridge ⓘ |
| urbanContext | inner harbor of Portland ⓘ |
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: Casco Bay Bridge Description of subject: The Casco Bay Bridge is a major bascule bridge in Portland, Maine, carrying U.S. Route 1 over the Fore River and serving as a key transportation link in the region.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.