US Bridges

M-40 over I-196

Fair

Allegan County, Michigan · 1.4 MI SW of Ottawa Col · Structure no. 000000000000131

Built
1972
53 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
243 ft
2 main spans
Daily traffic
8,550
2020 count
Owner
State
State Highway Agency

About this bridge

M-40 over I-196 is a steel stringer/multi-beam or girder carrying M-40 over I-196 in Allegan County, Michigan. It was built in 1972, so it is 53 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 8,550 vehicles a day, roughly 12% of them trucks, projected to reach 9,450 by 2040. The structure is 243 ft (74.1 m) long and 51 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesM-40
CrossesI-196
Location1.4 MI SW of Ottawa Col
RouteState Highway 40
CountyAllegan County
StateMichigan
Coordinates42.74381, -86.07171
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating105.4 US tons
Inventory rating62.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length243 ft (74.1 m)
Longest span123 ft (37.4 m)
Deck width51 ft (15.5 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,550 (2020)
Projected traffic9,450 by 2040
Trucks12%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was M-40 over I-196 built?

It was built in 1972, making it 53 years old in 2025.

What condition is M-40 over I-196 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 September 2024.

How much traffic does M-40 over I-196 carry?

About 8,550 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is M-40 over I-196?

The structure is 243 ft (74.1 m) long with a longest span of 123 ft (37.4 m) and a deck 51 ft wide.

Who owns M-40 over I-196?

It is owned by the State Highway Agency.