US-31 SB over M-120
FairMuskegon County, Michigan · 2.0 MI NE of Muskegon · Structure no. 000000000007596
- Built
- 1964
- 61 years old, rebuilt 2002
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 196 ft
- 3 main spans
- Daily traffic
- 22,817
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
US-31 SB over M-120 is a steel stringer/multi-beam or girder carrying US-31 SB over M-120 in Muskegon County, Michigan. It was built in 1964 and reconstructed in 2002, so it is 61 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 22,817 vehicles a day, roughly 5% of them trucks, projected to reach 19,858 by 2018. The structure is 196 ft (59.7 m) long and 58 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 | 7 Good | Some minor problems. |
| 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 M-120 built?
It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2002.
What condition is US-31 SB over M-120 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 M-120 carry?
About 22,817 vehicles per day (2007 count), of which roughly 5% are trucks.
How long is US-31 SB over M-120?
The structure is 196 ft (59.7 m) long with a longest span of 97 ft (29.6 m) and a deck 58 ft wide.
Who owns US-31 SB over M-120?
It is owned by the State Highway Agency.