Knapp Street over Grand River
FairKent County, Michigan · 0.15 MI E of Grnd Riv Drv · Structure no. 000000000005022
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 560 ft
- 5 main spans
- Daily traffic
- 14,445
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Knapp Street over Grand River is a steel stringer/multi-beam or girder carrying Knapp Street over Grand River in Kent County, Michigan. It was built in 1966, so it is 59 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 14,445 vehicles a day, roughly 8% of them trucks, projected to reach 20,223 by 2042. The structure is 560 ft (170.7 m) long and 37 ft wide. If it were closed, the detour would be 11.8 mi (19 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Knapp Street over Grand River built?
It was built in 1966, making it 59 years old in 2025.
What condition is Knapp Street over Grand 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 September 2024.
How much traffic does Knapp Street over Grand River carry?
About 14,445 vehicles per day (2022 count), of which roughly 8% are trucks.
How long is Knapp Street over Grand River?
The structure is 560 ft (170.7 m) long with a longest span of 112 ft (34.1 m) and a deck 37 ft wide.
Who owns Knapp Street over Grand River?
It is owned by the County Highway Agency.