US-31 SB over AMTRAK RR
FairBerrien County, Michigan · 3.5 MI SW of Niles · Structure no. 000000000000895
- Built
- 1979
- 46 years old
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 163 ft
- 3 main spans
- Daily traffic
- 8,122
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
US-31 SB over AMTRAK RR is a prestressed concrete stringer/multi-beam or girder carrying US-31 SB over AMTRAK RR in Berrien County, Michigan. It was built in 1979, so it is 46 years old, younger 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 8,122 vehicles a day, roughly 13% of them trucks, projected to reach 9,964 by 2018. The structure is 163 ft (49.7 m) long and 46 ft wide. If it were closed, the detour would be 3.7 mi (6 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-31 SB over AMTRAK RR built?
It was built in 1979, making it 46 years old in 2025.
What condition is US-31 SB over AMTRAK 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 May 2024.
How much traffic does US-31 SB over AMTRAK RR carry?
About 8,122 vehicles per day (2007 count), of which roughly 13% are trucks.
How long is US-31 SB over AMTRAK RR?
The structure is 163 ft (49.7 m) long with a longest span of 54 ft (16.4 m) and a deck 46 ft wide.
Who owns US-31 SB over AMTRAK RR?
It is owned by the State Highway Agency.