US Bridges

I-75 SB over M-80|CANADIAN National R

Fair

Chippewa County, Michigan · 8.4 MI S of M-28 · Structure no. 000000000001575

Built
1962
63 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
247 ft
4 main spans
Daily traffic
1,994
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 SB over M-80|CANADIAN National R is a steel stringer/multi-beam or girder carrying I-75 SB over M-80|CANADIAN National R in Chippewa County, Michigan. It was built in 1962, so it is 63 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,994 vehicles a day, roughly 9% of them trucks, projected to reach 9,272 by 2028. The structure is 247 ft (75.4 m) long and 44 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesI-75 SB
CrossesM-80|CANADIAN National R
Location8.4 MI S of M-28
RouteInterstate 75
CountyChippewa County
StateMichigan
Coordinates46.27606, -84.50682
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.1 US tons
Inventory rating36.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length247 ft (75.4 m)
Longest span71 ft (21.7 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,994 (2007)
Projected traffic9,272 by 2028
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed8.1 mi (13 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 SB over M-80|CANADIAN National R built?

It was built in 1962, making it 63 years old in 2025.

What condition is I-75 SB over M-80|CANADIAN National R in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does I-75 SB over M-80|CANADIAN National R carry?

About 1,994 vehicles per day (2007 count), of which roughly 9% are trucks.

How long is I-75 SB over M-80|CANADIAN National R?

The structure is 247 ft (75.4 m) long with a longest span of 71 ft (21.7 m) and a deck 44 ft wide.

Who owns I-75 SB over M-80|CANADIAN National R?

It is owned by the State Highway Agency.