US-31 NB over US-10 & US-31
FairMason County, Michigan · 3 MI E of Ludington · Structure no. 000000000006655
- Built
- 1987
- 38 years old
- Condition
- Fair
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 121 ft
- 1 main span
- Daily traffic
- 2,498
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
US-31 NB over US-10 & US-31 is a steel stringer/multi-beam or girder carrying US-31 NB over US-10 & US-31 in Mason County, Michigan. It was built in 1987, so it is 38 years old, younger 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 2,498 vehicles a day, roughly 10% of them trucks, projected to reach 1,500 by 1977. The structure is 121 ft (36.8 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-31 NB over US-10 & US-31 built?
It was built in 1987, making it 38 years old in 2025.
What condition is US-31 NB over US-10 & US-31 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 April 2024.
How much traffic does US-31 NB over US-10 & US-31 carry?
About 2,498 vehicles per day (2007 count), of which roughly 10% are trucks.
How long is US-31 NB over US-10 & US-31?
The structure is 121 ft (36.8 m) long with a longest span of 121 ft (36.8 m) and a deck 36 ft wide.
Who owns US-31 NB over US-10 & US-31?
It is owned by the State Highway Agency.