M-71 over Holly Drain
GoodShiawassee County, Michigan · 0.3 MI NW of I-69 · Structure no. 000000000009769
- Built
- 1961
- 64 years old, rebuilt 2011
- Condition
- Good
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 59 ft
- 1 main span
- Daily traffic
- 8,100
- 2011 count
- Owner
- State
- State Highway Agency
About this bridge
M-71 over Holly Drain is a steel stringer/multi-beam or girder carrying M-71 over Holly Drain in Shiawassee County, Michigan. It was built in 1961 and reconstructed in 2011, so it is 64 years old, older 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 59 ft (18.1 m) long and 47 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was M-71 over Holly Drain built?
It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2011.
What condition is M-71 over Holly Drain 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 Holly Drain carry?
About 8,100 vehicles per day (2011 count), of which roughly 5% are trucks.
How long is M-71 over Holly Drain?
The structure is 59 ft (18.1 m) long with a longest span of 56 ft (17.2 m) and a deck 47 ft wide.
Who owns M-71 over Holly Drain?
It is owned by the State Highway Agency.