M-50 over Thornapple River
GoodEaton County, Michigan · 9.5 MI NW of Charlotte · Structure no. 000000000002230
- Built
- 2013
- 12 years old
- Condition
- Good
- inspected March 2025
- Type
- Box Beam or Girders - Single or Spread
- Prestressed Concrete
- Length
- 83 ft
- 1 main span
- Daily traffic
- 2,842
- 2013 count
- Owner
- State
- State Highway Agency
About this bridge
M-50 over Thornapple River is a prestressed concrete box beam or girders - single or spread carrying M-50 over Thornapple River in Eaton County, Michigan. It was built in 2013, so it is 12 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 2,842 vehicles a day, roughly 17% of them trucks, projected to reach 3,350 by 2032. The structure is 83 ft (25.3 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was M-50 over Thornapple River built?
It was built in 2013, making it 12 years old in 2025.
What condition is M-50 over Thornapple River 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 March 2025.
How much traffic does M-50 over Thornapple River carry?
About 2,842 vehicles per day (2013 count), of which roughly 17% are trucks.
How long is M-50 over Thornapple River?
The structure is 83 ft (25.3 m) long with a longest span of 81 ft (24.7 m) and a deck 47 ft wide.
Who owns M-50 over Thornapple River?
It is owned by the State Highway Agency.