US-12 over River Raisin
PoorLenawee County, Michigan · In Clinton · Structure no. 000000000005541
- Built
- 1977
- 48 years old
- Condition
- Poor
- inspected May 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 74 ft
- 1 main span
- Daily traffic
- 10,834
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
US-12 over River Raisin is a prestressed concrete box beam or girders - multiple carrying US-12 over River Raisin in Lenawee County, Michigan. It was built in 1977, so it is 48 years old, younger than the Michigan average of 48.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 10,834 vehicles a day, roughly 6% of them trucks, projected to reach 12,822 by 2018. The structure is 74 ft (22.5 m) long and 52 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-12 over River Raisin built?
It was built in 1977, making it 48 years old in 2025.
What condition is US-12 over River Raisin in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.
How much traffic does US-12 over River Raisin carry?
About 10,834 vehicles per day (2007 count), of which roughly 6% are trucks.
How long is US-12 over River Raisin?
The structure is 74 ft (22.5 m) long with a longest span of 74 ft (22.5 m) and a deck 52 ft wide.
Who owns US-12 over River Raisin?
It is owned by the State Highway Agency.