Old US-31 over CSX RR
GoodMason County, Michigan · 0.4 MI S of US-10 · Structure no. 000000000006639
- Built
- 1935
- 90 years old, rebuilt 2021
- Condition
- Good
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 167 ft
- 4 main spans
- Daily traffic
- 11,200
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
Old US-31 over CSX RR is a steel stringer/multi-beam or girder carrying Old US-31 over CSX RR in Mason County, Michigan. It was built in 1935 and reconstructed in 2021, so it is 90 years old, older than the Michigan average of 48.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 11,200 vehicles a day, roughly 4% of them trucks, projected to reach 12,375 by 2041. The structure is 167 ft (50.9 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
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old US-31 over CSX RR built?
It was built in 1935, making it 90 years old in 2025. It was reconstructed in 2021.
What condition is Old US-31 over CSX RR in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.
How much traffic does Old US-31 over CSX RR carry?
About 11,200 vehicles per day (2021 count), of which roughly 4% are trucks.
How long is Old US-31 over CSX RR?
The structure is 167 ft (50.9 m) long with a longest span of 52 ft (15.8 m) and a deck 49 ft wide.
Who owns Old US-31 over CSX RR?
It is owned by the State Highway Agency.