100th Street over Thornapple River
GoodKent County, Michigan · 0.40 MI E of Alaska Ave · Structure no. 000000000005007
- Built
- 1970
- 55 years old
- Condition
- Good
- inspected November 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 350 ft
- 5 main spans
- Daily traffic
- 2,730
- 2005 count
- Owner
- County
- County Highway Agency
About this bridge
100th Street over Thornapple River is a prestressed concrete box beam or girders - multiple carrying 100th Street over Thornapple River in Kent County, Michigan. It was built in 1970, so it is 55 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 2,730 vehicles a day, projected to reach 4,640 by 2025. The structure is 350 ft (106.7 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 7 Good | Some minor problems. |
| 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 100th Street over Thornapple River built?
It was built in 1970, making it 55 years old in 2025.
What condition is 100th Street 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 100th Street over Thornapple River carry?
About 2,730 vehicles per day (2005 count).
How long is 100th Street over Thornapple River?
The structure is 350 ft (106.7 m) long with a longest span of 70 ft (21.3 m) and a deck 38 ft wide.
Who owns 100th Street over Thornapple River?
It is owned by the County Highway Agency.