US Bridges

M-37 over I-96 WB

Fair

Kent County, Michigan · In Walker · Structure no. 000000000004760

Built
1961
64 years old, rebuilt 1988
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
143 ft
3 main spans
Daily traffic
52,285
2007 count
Owner
State
State Highway Agency

About this bridge

M-37 over I-96 WB is a steel stringer/multi-beam or girder carrying M-37 over I-96 WB in Kent County, Michigan. It was built in 1961 and reconstructed in 1988, so it is 64 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 52,285 vehicles a day, roughly 1% of them trucks, projected to reach 68,012 by 2018. The structure is 143 ft (43.6 m) long and 101 ft wide.

Location

Open in Google Maps
CarriesM-37
CrossesI-96 WB
LocationIn Walker
RouteState Highway 37
CountyKent County
StateMichigan
Coordinates43.01745, -85.68894
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
Deck7 GoodSome minor problems.
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 inspectionOctober 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.1 US tons
Inventory rating40.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length143 ft (43.6 m)
Longest span68 ft (20.7 m)
Deck width101 ft (30.8 m)
Roadway width98 ft (29.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic52,285 (2007)
Projected traffic68,012 by 2018
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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-37 over I-96 WB built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1988.

What condition is M-37 over I-96 WB 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 October 2024.

How much traffic does M-37 over I-96 WB carry?

About 52,285 vehicles per day (2007 count), of which roughly 1% are trucks.

How long is M-37 over I-96 WB?

The structure is 143 ft (43.6 m) long with a longest span of 68 ft (20.7 m) and a deck 101 ft wide.

Who owns M-37 over I-96 WB?

It is owned by the State Highway Agency.