US-131 SB over Rocky River
FairSt. Joseph County, Michigan · 0.3 MI W of Three Rivers · Structure no. 000000000010265
- Built
- 1956
- 69 years old
- Condition
- Fair
- inspected July 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 90 ft
- 2 main spans
- Daily traffic
- 9,588
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
US-131 SB over Rocky River is a prestressed concrete box beam or girders - multiple carrying US-131 SB over Rocky River in St. Joseph County, Michigan. It was built in 1956, so it is 69 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 9,588 vehicles a day, roughly 8% of them trucks, projected to reach 10,588 by 2037. The structure is 90 ft (27.4 m) long and 50 ft wide.
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 | 7 Good | Some minor problems. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| 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-131 SB over Rocky River built?
It was built in 1956, making it 69 years old in 2025.
What condition is US-131 SB over Rocky 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 July 2023.
How much traffic does US-131 SB over Rocky River carry?
About 9,588 vehicles per day (2017 count), of which roughly 8% are trucks.
How long is US-131 SB over Rocky River?
The structure is 90 ft (27.4 m) long with a longest span of 45 ft (13.7 m) and a deck 50 ft wide.
Who owns US-131 SB over Rocky River?
It is owned by the State Highway Agency.