US-31 over Pine River
FairCharlevoix County, Michigan · In Charlevoix · Structure no. 000000000001471
- Built
- 1949
- 76 years old, rebuilt 1992
- Condition
- Fair
- inspected May 2024
- Type
- Movable - Bascule
- Steel
- Length
- 223 ft
- 1 main span
- Daily traffic
- 15,321
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
US-31 over Pine River is a steel movable - bascule carrying US-31 over Pine River in Charlevoix County, Michigan. It was built in 1949 and reconstructed in 1992, so it is 76 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 15,321 vehicles a day, roughly 3% of them trucks, projected to reach 14,675 by 2036. The structure is 223 ft (68.1 m) long and 58 ft wide. If it were closed, the detour would be 34.2 mi (55 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 | 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-31 over Pine River built?
It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1992.
What condition is US-31 over Pine 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 May 2024.
How much traffic does US-31 over Pine River carry?
About 15,321 vehicles per day (2021 count), of which roughly 3% are trucks.
How long is US-31 over Pine River?
The structure is 223 ft (68.1 m) long with a longest span of 111 ft (33.8 m) and a deck 58 ft wide.
Who owns US-31 over Pine River?
It is owned by the State Highway Agency.