Mackinac Bridge Authority
E249011
The Mackinac Bridge Authority is a public agency responsible for operating, managing, and overseeing the finances and maintenance of Michigan’s Mackinac Bridge.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mackinac Bridge Authority canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T2255113 — 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: Mackinac Bridge Authority Context triple: [Mackinac Bridge, maintainedBy, Mackinac Bridge Authority]
-
A.
Saint Lawrence Seaway Development Corporation
The Saint Lawrence Seaway Development Corporation is a U.S. federal agency responsible for operating and maintaining the American portion of the St. Lawrence Seaway, a key commercial shipping route connecting the Great Lakes to the Atlantic Ocean.
-
B.
Mackinac Bridge
The Mackinac Bridge is a major suspension bridge in Michigan that connects the state's Upper and Lower Peninsulas and is one of the longest suspension bridges in the world.
-
C.
Mackinac Bridge Historic District
The Mackinac Bridge Historic District is a historically significant area at the Straits of Mackinac in Michigan that preserves maritime, transportation, and architectural heritage associated with the Mackinac Bridge and surrounding shoreline.
-
D.
Michigan Department of Transportation
The Michigan Department of Transportation is the state government agency responsible for planning, building, and maintaining Michigan’s transportation infrastructure, including its highways, bridges, and public transit systems.
-
E.
St. Lawrence Seaway Management Corporation
The St. Lawrence Seaway Management Corporation is the Canadian, not-for-profit entity responsible for operating and maintaining the Canadian portions of the St. Lawrence Seaway, a key binational commercial shipping route between the Great Lakes and the Atlantic Ocean.
- 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: Mackinac Bridge Authority Target entity description: The Mackinac Bridge Authority is a public agency responsible for operating, managing, and overseeing the finances and maintenance of Michigan’s Mackinac Bridge.
-
A.
Saint Lawrence Seaway Development Corporation
The Saint Lawrence Seaway Development Corporation is a U.S. federal agency responsible for operating and maintaining the American portion of the St. Lawrence Seaway, a key commercial shipping route connecting the Great Lakes to the Atlantic Ocean.
-
B.
Mackinac Bridge
The Mackinac Bridge is a major suspension bridge in Michigan that connects the state's Upper and Lower Peninsulas and is one of the longest suspension bridges in the world.
-
C.
Mackinac Bridge Historic District
The Mackinac Bridge Historic District is a historically significant area at the Straits of Mackinac in Michigan that preserves maritime, transportation, and architectural heritage associated with the Mackinac Bridge and surrounding shoreline.
-
D.
Michigan Department of Transportation
The Michigan Department of Transportation is the state government agency responsible for planning, building, and maintaining Michigan’s transportation infrastructure, including its highways, bridges, and public transit systems.
-
E.
St. Lawrence Seaway Management Corporation
The St. Lawrence Seaway Management Corporation is the Canadian, not-for-profit entity responsible for operating and maintaining the Canadian portions of the St. Lawrence Seaway, a key binational commercial shipping route between the Great Lakes and the Atlantic Ocean.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
government agency
ⓘ
public agency ⓘ transportation authority ⓘ |
| communicatesWith | Michigan Department of Transportation ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| employs |
administrative staff
ⓘ
bridge maintenance workers ⓘ toll collectors ⓘ |
| governs | policies for Mackinac Bridge use ⓘ |
| hasDomain |
bridge engineering oversight
ⓘ
public infrastructure management ⓘ |
| headquartersLocation |
Mackinaw City, Michigan
ⓘ
St. Ignace, Michigan ⓘ |
| implements |
bridge closure procedures when necessary
ⓘ
traffic restrictions during high winds ⓘ |
| industry |
toll road operations
ⓘ
transportation infrastructure ⓘ |
| jurisdiction | Straits of Mackinac crossing ⓘ |
| locatedInTimeZone | Eastern Time Zone ⓘ |
| maintains | Mackinac Bridge ⓘ |
| manages | Mackinac Bridge ⓘ |
| monitors |
traffic conditions on Mackinac Bridge
ⓘ
wind conditions on Mackinac Bridge ⓘ |
| operates | Mackinac Bridge ⓘ |
| oversees |
inspection of Mackinac Bridge
ⓘ
safety of Mackinac Bridge ⓘ structural maintenance of Mackinac Bridge ⓘ |
| parentOrganization |
Michigan
ⓘ
surface form:
State of Michigan
|
| partOf |
government of Michigan
ⓘ
surface form:
Government of Michigan
|
| regulates | traffic on Mackinac Bridge ⓘ |
| responsibleFor |
deck resurfacing of Mackinac Bridge
ⓘ
finances of Mackinac Bridge ⓘ lighting of Mackinac Bridge ⓘ maintenance of Mackinac Bridge ⓘ operation of Mackinac Bridge ⓘ painting of Mackinac Bridge ⓘ security of Mackinac Bridge ⓘ winter maintenance of Mackinac Bridge ⓘ |
| serviceProvided |
bridge crossing services
ⓘ
bridge maintenance services ⓘ toll collection ⓘ |
| sets | Mackinac Bridge toll rates ⓘ |
| state |
Michigan (most of state)
ⓘ
surface form:
Michigan
|
| subjectTo |
United States federal transportation regulations
ⓘ
laws of the State of Michigan ⓘ |
| uses |
toll revenue for bridge maintenance
ⓘ
toll revenue for bridge operations ⓘ |
| website | https://www.mackinacbridge.org/ ⓘ |
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: Mackinac Bridge Authority Description of subject: The Mackinac Bridge Authority is a public agency responsible for operating, managing, and overseeing the finances and maintenance of Michigan’s Mackinac Bridge.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Mackinac Bridge