108th ST over Thornapple River
GoodKent County, Michigan · 0.2 MI W of Whitneyville · Structure no. 000000000005126
- Built
- 1932
- 93 years old, rebuilt 2015
- Condition
- Good
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 150 ft
- 2 main spans
- Daily traffic
- 965
- 2014 count
- Owner
- County
- County Highway Agency
About this bridge
108th ST over Thornapple River is a prestressed concrete stringer/multi-beam or girder carrying 108th ST over Thornapple River in Kent County, Michigan. It was built in 1932 and reconstructed in 2015, so it is 93 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 965 vehicles a day, roughly 8% of them trucks, projected to reach 1,544 by 2034. The structure is 150 ft (45.7 m) long and 38 ft wide. 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 |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 108th ST over Thornapple River built?
It was built in 1932, making it 93 years old in 2025. It was reconstructed in 2015.
What condition is 108th ST 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 November 2023.
How much traffic does 108th ST over Thornapple River carry?
About 965 vehicles per day (2014 count), of which roughly 8% are trucks.
How long is 108th ST over Thornapple River?
The structure is 150 ft (45.7 m) long with a longest span of 75 ft (22.9 m) and a deck 38 ft wide.
Who owns 108th ST over Thornapple River?
It is owned by the County Highway Agency.