US-23 NB over S Br Macon River
FairMonroe County, Michigan · 1.5 MI N of M-50 · Structure no. 000000000007073
- Built
- 1961
- 64 years old, rebuilt 2003
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 123 ft
- 3 main spans
- Daily traffic
- 16,735
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
US-23 NB over S Br Macon River is a steel stringer/multi-beam or girder carrying US-23 NB over S Br Macon River in Monroe County, Michigan. It was built in 1961 and reconstructed in 2003, so it is 64 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 16,735 vehicles a day, roughly 17% of them trucks, projected to reach 20,019 by 2018. The structure is 123 ft (37.5 m) long and 47 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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-23 NB over S Br Macon River built?
It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2003.
What condition is US-23 NB over S Br Macon 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 2023.
How much traffic does US-23 NB over S Br Macon River carry?
About 16,735 vehicles per day (2007 count), of which roughly 17% are trucks.
How long is US-23 NB over S Br Macon River?
The structure is 123 ft (37.5 m) long with a longest span of 41 ft (12.5 m) and a deck 47 ft wide.
Who owns US-23 NB over S Br Macon River?
It is owned by the State Highway Agency.