US Bridges

M-37 over Muskegon River

Fair

Newaygo County, Michigan · In Newaygo · Structure no. 000000000007723

Built
1953
72 years old, rebuilt 2000
Condition
Fair
inspected June 2024
Type
Girder and Floorbeam System
Steel
Length
555 ft
5 main spans
Daily traffic
15,989
2007 count
Owner
State
State Highway Agency

About this bridge

M-37 over Muskegon River is a steel girder and floorbeam system carrying M-37 over Muskegon River in Newaygo County, Michigan. It was built in 1953 and reconstructed in 2000, so it is 72 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 15,989 vehicles a day, roughly 2% of them trucks, projected to reach 18,429 by 2018. The structure is 555 ft (169.2 m) long and 63 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesM-37
CrossesMuskegon River
LocationIn Newaygo
RouteState Highway 37
CountyNewaygo County
StateMichigan
Coordinates43.42321, -85.79822
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating83.6 US tons
Inventory rating50 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length555 ft (169.2 m)
Longest span122 ft (37.2 m)
Deck width63 ft (19.1 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,989 (2007)
Projected traffic18,429 by 2018
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-37 over Muskegon River built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 2000.

What condition is M-37 over Muskegon River 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 June 2024.

How much traffic does M-37 over Muskegon River carry?

About 15,989 vehicles per day (2007 count), of which roughly 2% are trucks.

How long is M-37 over Muskegon River?

The structure is 555 ft (169.2 m) long with a longest span of 122 ft (37.2 m) and a deck 63 ft wide.

Who owns M-37 over Muskegon River?

It is owned by the State Highway Agency.