US Bridges

I-194 & M-66 SB over I-94

Fair

Calhoun County, Michigan · At M-66 · Structure no. 000000000001255

Built
1960
65 years old, rebuilt 1994
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
363 ft
4 main spans
Daily traffic
12,490
2023 count
Owner
State
State Highway Agency

About this bridge

I-194 & M-66 SB over I-94 is a steel continuous stringer/multi-beam or girder carrying I-194 & M-66 SB over I-94 in Calhoun County, Michigan. It was built in 1960 and reconstructed in 1994, 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 fair condition with a lowest component rating of 6 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 12,490 vehicles a day, roughly 4% of them trucks. The structure is 363 ft (110.6 m) long and 57 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI-194 & M-66 SB
CrossesI-94
LocationAt M-66
RouteInterstate 194
CountyCalhoun County
StateMichigan
Coordinates42.26823, -85.17892
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.4 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length363 ft (110.6 m)
Longest span113 ft (34.5 m)
Deck width57 ft (17.5 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,490 (2023)
Projected traffic—
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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-194 & M-66 SB over I-94 built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1994.

What condition is I-194 & M-66 SB over I-94 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 August 2023.

How much traffic does I-194 & M-66 SB over I-94 carry?

About 12,490 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is I-194 & M-66 SB over I-94?

The structure is 363 ft (110.6 m) long with a longest span of 113 ft (34.5 m) and a deck 57 ft wide.

Who owns I-194 & M-66 SB over I-94?

It is owned by the State Highway Agency.