M-20 Ext over US-31
FairOceana County, Michigan · 1.8 MI W of New Era · Structure no. 000000000008332
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 347 ft
- 3 main spans
- Daily traffic
- 2,885
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
M-20 Ext over US-31 is a steel stringer/multi-beam or girder carrying M-20 Ext over US-31 in Oceana County, Michigan. It was built in 1974, so it is 51 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 2,885 vehicles a day, roughly 9% of them trucks, projected to reach 3,231 by 2018. The structure is 347 ft (105.7 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was M-20 Ext over US-31 built?
It was built in 1974, making it 51 years old in 2025.
What condition is M-20 Ext over US-31 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 M-20 Ext over US-31 carry?
About 2,885 vehicles per day (2007 count), of which roughly 9% are trucks.
How long is M-20 Ext over US-31?
The structure is 347 ft (105.7 m) long with a longest span of 119 ft (36.2 m) and a deck 50 ft wide.
Who owns M-20 Ext over US-31?
It is owned by the State Highway Agency.