Johnson Road over Thornapple Drain
GoodEaton County, Michigan · 2 MI NW of Potterville · Structure no. 000000000002375
- Built
- 1996
- 29 years old
- Condition
- Good
- inspected May 2023
- Type
- Culvert
- Aluminum, Wrought Iron, or Cast Iron
- Length
- 32 ft
- 1 main span
- Daily traffic
- 49
- 2012 count
- Owner
- County
- County Highway Agency
About this bridge
Johnson Road over Thornapple Drain is a aluminum, wrought iron, or cast iron culvert carrying Johnson Road over Thornapple Drain in Eaton County, Michigan. It was built in 1996, so it is 29 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 49 vehicles a day, projected to reach 90 by 2015. The structure is 32 ft (9.9 m) long. If it were closed, the detour would be 5 mi (8 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Johnson Road over Thornapple Drain built?
It was built in 1996, making it 29 years old in 2025.
What condition is Johnson Road over Thornapple 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 May 2023.
How much traffic does Johnson Road over Thornapple Drain carry?
About 49 vehicles per day (2012 count).
How long is Johnson Road over Thornapple Drain?
The structure is 32 ft (9.9 m) long with a longest span of 32 ft (9.9 m).
Who owns Johnson Road over Thornapple Drain?
It is owned by the County Highway Agency.