84th Street over Thornapple River
FairKent County, Michigan · 0.30 MI W of Alaska Ave · Structure no. 000000000005009
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 255 ft
- 3 main spans
- Daily traffic
- 2,849
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
84th Street over Thornapple River is a prestressed concrete stringer/multi-beam or girder carrying 84th Street over Thornapple River in Kent County, Michigan. It was built in 1968, so it is 57 years old, older than the Michigan average of 48.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 2,849 vehicles a day, roughly 8% of them trucks, projected to reach 3,989 by 2035. The structure is 255 ft (77.7 m) long and 37 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 84th Street over Thornapple River built?
It was built in 1968, making it 57 years old in 2025.
What condition is 84th Street over Thornapple River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.
How much traffic does 84th Street over Thornapple River carry?
About 2,849 vehicles per day (2015 count), of which roughly 8% are trucks.
How long is 84th Street over Thornapple River?
The structure is 255 ft (77.7 m) long with a longest span of 85 ft (25.9 m) and a deck 37 ft wide.
Who owns 84th Street over Thornapple River?
It is owned by the County Highway Agency.