US Bridges

US-31 NB over Muskegon River

Fair

Muskegon County, Michigan · 2.0 MI N of M-46 · Structure no. 000000000007583

Built
1964
61 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
195 ft
3 main spans
Daily traffic
22,817
2007 count
Owner
State
State Highway Agency

About this bridge

US-31 NB over Muskegon River is a steel stringer/multi-beam or girder carrying US-31 NB over Muskegon River in Muskegon County, Michigan. It was built in 1964, so it is 61 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 22,817 vehicles a day, roughly 6% of them trucks, projected to reach 26,629 by 2018. The structure is 195 ft (59.4 m) long and 67 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS-31 NB
CrossesMuskegon River
Location2.0 MI N of M-46
RouteU.S. Route 31
CountyMuskegon County
StateMichigan
Coordinates43.26298, -86.20349
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating97.1 US tons
Inventory rating58.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length195 ft (59.4 m)
Longest span65 ft (19.8 m)
Deck width67 ft (20.4 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,817 (2007)
Projected traffic26,629 by 2018
Trucks6%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US-31 NB over Muskegon River built?

It was built in 1964, making it 61 years old in 2025.

What condition is US-31 NB 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 July 2024.

How much traffic does US-31 NB over Muskegon River carry?

About 22,817 vehicles per day (2007 count), of which roughly 6% are trucks.

How long is US-31 NB over Muskegon River?

The structure is 195 ft (59.4 m) long with a longest span of 65 ft (19.8 m) and a deck 67 ft wide.

Who owns US-31 NB over Muskegon River?

It is owned by the State Highway Agency.