US Bridges

I-75 NB over Cheeseman RD

Poor

Mackinac County, Michigan · In ST Ignace · Structure no. 000000000005947

Built
1960
65 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
277 ft
4 main spans
Daily traffic
2,555
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 NB over Cheeseman RD is a steel stringer/multi-beam or girder carrying I-75 NB over Cheeseman RD in Mackinac County, Michigan. It was built in 1960, so it is 65 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 2,555 vehicles a day, roughly 8% of them trucks, projected to reach 6,165 by 2018. The structure is 277 ft (84.3 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-75 NB
CrossesCheeseman RD
LocationIn ST Ignace
RouteInterstate 75
CountyMackinac County
StateMichigan
Coordinates45.87716, -84.73889
Functional classRural Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating89.3 US tons
Inventory rating53.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length277 ft (84.3 m)
Longest span73 ft (22.2 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,555 (2007)
Projected traffic6,165 by 2018
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 NB over Cheeseman RD built?

It was built in 1960, making it 65 years old in 2025.

What condition is I-75 NB over Cheeseman RD in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does I-75 NB over Cheeseman RD carry?

About 2,555 vehicles per day (2007 count), of which roughly 8% are trucks.

How long is I-75 NB over Cheeseman RD?

The structure is 277 ft (84.3 m) long with a longest span of 73 ft (22.2 m) and a deck 37 ft wide.

Who owns I-75 NB over Cheeseman RD?

It is owned by the State Highway Agency.