US-31 SB over N Chan Muskegon River
FairMuskegon County, Michigan · 2.6 MI N of M-46 · Structure no. 000000000007584
- Built
- 1964
- 61 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 324 ft
- 4 main spans
- Daily traffic
- 19,600
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
US-31 SB over N Chan Muskegon River is a steel stringer/multi-beam or girder carrying US-31 SB over N Chan 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 19,600 vehicles a day, roughly 5% of them trucks, projected to reach 22,540 by 2035. The structure is 324 ft (98.8 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-31 SB over N Chan Muskegon River built?
It was built in 1964, making it 61 years old in 2025.
What condition is US-31 SB over N Chan 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 August 2024.
How much traffic does US-31 SB over N Chan Muskegon River carry?
About 19,600 vehicles per day (2015 count), of which roughly 5% are trucks.
How long is US-31 SB over N Chan Muskegon River?
The structure is 324 ft (98.8 m) long with a longest span of 90 ft (27.4 m) and a deck 49 ft wide.
Who owns US-31 SB over N Chan Muskegon River?
It is owned by the State Highway Agency.