US-12 over ST Joseph River
FairBerrien County, Michigan · 0.8 MI S of Niles · Structure no. 000000000000916
- Built
- 1954
- 71 years old, rebuilt 1997
- Condition
- Fair
- inspected May 2024
- Type
- Girder and Floorbeam System
- Steel
- Length
- 480 ft
- 5 main spans
- Daily traffic
- 11,300
- 2013 count
- Owner
- State
- State Highway Agency
About this bridge
US-12 over ST Joseph River is a steel girder and floorbeam system carrying US-12 over ST Joseph River in Berrien County, Michigan. It was built in 1954 and reconstructed in 1997, so it is 71 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 11,300 vehicles a day, roughly 10% of them trucks, projected to reach 21,042 by 2018. The structure is 480 ft (146.3 m) long and 65 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 | 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-12 over ST Joseph River built?
It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1997.
What condition is US-12 over ST Joseph 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-12 over ST Joseph River carry?
About 11,300 vehicles per day (2013 count), of which roughly 10% are trucks.
How long is US-12 over ST Joseph River?
The structure is 480 ft (146.3 m) long with a longest span of 100 ft (30.5 m) and a deck 65 ft wide.
Who owns US-12 over ST Joseph River?
It is owned by the State Highway Agency.