US-31 Br over US-31
FairMason County, Michigan · 2.2 MI N of County Line · Structure no. 000000000006649
- Built
- 1986
- 39 years old
- Condition
- Fair
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 338 ft
- 2 main spans
- Daily traffic
- 1,400
- 1995 count
- Owner
- State
- State Highway Agency
About this bridge
US-31 Br over US-31 is a steel continuous stringer/multi-beam or girder carrying US-31 Br over US-31 in Mason County, Michigan. It was built in 1986, so it is 39 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 1,400 vehicles a day, roughly 9% of them trucks, projected to reach 13,200 by 2015. The structure is 338 ft (103 m) long and 47 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-31 Br over US-31 built?
It was built in 1986, making it 39 years old in 2025.
What condition is US-31 Br over 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 Br over US-31 carry?
About 1,400 vehicles per day (1995 count), of which roughly 9% are trucks.
How long is US-31 Br over US-31?
The structure is 338 ft (103 m) long with a longest span of 169 ft (51.5 m) and a deck 47 ft wide.
Who owns US-31 Br over US-31?
It is owned by the State Highway Agency.