US-12 over Ann Arbor RR
FairWashtenaw County, Michigan · 3.4 MI NE of Saline · Structure no. 000000000010814
- Built
- 1924
- 101 years old, rebuilt 1979
- Condition
- Fair
- inspected January 2025
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 141 ft
- 3 main spans
- Daily traffic
- 23,822
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
US-12 over Ann Arbor RR is a prestressed concrete stringer/multi-beam or girder carrying US-12 over Ann Arbor RR in Washtenaw County, Michigan. It was built in 1924 and reconstructed in 1979, so it is 101 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 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 23,822 vehicles a day, roughly 5% of them trucks, projected to reach 28,265 by 2018. The structure is 141 ft (42.9 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-12 over Ann Arbor RR built?
It was built in 1924, making it 101 years old in 2025. It was reconstructed in 1979.
What condition is US-12 over Ann Arbor RR 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 January 2025.
How much traffic does US-12 over Ann Arbor RR carry?
About 23,822 vehicles per day (2007 count), of which roughly 5% are trucks.
How long is US-12 over Ann Arbor RR?
The structure is 141 ft (42.9 m) long with a longest span of 47 ft (14.3 m) and a deck 60 ft wide.
Who owns US-12 over Ann Arbor RR?
It is owned by the State Highway Agency.