M-71 over I-69
GoodShiawassee County, Michigan · @ M-71 · Structure no. 000000000009752
- Built
- 2011
- 14 years old
- Condition
- Good
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 294 ft
- 4 main spans
- Daily traffic
- 8,100
- 2011 count
- Owner
- State
- State Highway Agency
About this bridge
M-71 over I-69 is a steel continuous stringer/multi-beam or girder carrying M-71 over I-69 in Shiawassee County, Michigan. It was built in 2011, so it is 14 years old, younger than the Michigan average of 48.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 8,100 vehicles a day, roughly 5% of them trucks, projected to reach 8,900 by 2031. The structure is 294 ft (89.6 m) long and 47 ft wide.
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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-71 over I-69 built?
It was built in 2011, making it 14 years old in 2025.
What condition is M-71 over I-69 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.
How much traffic does M-71 over I-69 carry?
About 8,100 vehicles per day (2011 count), of which roughly 5% are trucks.
How long is M-71 over I-69?
The structure is 294 ft (89.6 m) long with a longest span of 102 ft (31.1 m) and a deck 47 ft wide.
Who owns M-71 over I-69?
It is owned by the State Highway Agency.