US-31 SB over US-31 Br(colby Rd)
FairMuskegon County, Michigan · S JCT US-31BR · Structure no. 000000000007603
- Built
- 1963
- 62 years old, rebuilt 2000
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 127 ft
- 3 main spans
- Daily traffic
- 9,754
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
US-31 SB over US-31 Br(colby Rd) is a steel stringer/multi-beam or girder carrying US-31 SB over US-31 Br(colby Rd) in Muskegon County, Michigan. It was built in 1963 and reconstructed in 2000, so it is 62 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 9,754 vehicles a day, roughly 7% of them trucks, projected to reach 10,364 by 2018. The structure is 127 ft (38.7 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 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 US-31 Br(colby Rd) built?
It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2000.
What condition is US-31 SB over US-31 Br(colby Rd) 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 2024.
How much traffic does US-31 SB over US-31 Br(colby Rd) carry?
About 9,754 vehicles per day (2007 count), of which roughly 7% are trucks.
How long is US-31 SB over US-31 Br(colby Rd)?
The structure is 127 ft (38.7 m) long with a longest span of 57 ft (17.3 m) and a deck 43 ft wide.
Who owns US-31 SB over US-31 Br(colby Rd)?
It is owned by the State Highway Agency.