US 63 N over Grindstone CR
FairPosted for loadBoone County, Missouri · S 20 T 48 N R 12 W · Structure no. 2892
- Built
- 1976
- 49 years old
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 253 ft
- 3 main spans
- Daily traffic
- 24,618
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US 63 N over Grindstone CR is a steel continuous stringer/multi-beam or girder carrying US 63 N over Grindstone CR in Boone County, Missouri. It was built in 1976, so it is 49 years old, older than the Missouri average of 45.1 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. Its operating status is: posted for load restriction.
It carries about 24,618 vehicles a day, roughly 8% of them trucks, projected to reach 40,620 by 2044. The structure is 253 ft (77.1 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 63 N over Grindstone CR built?
It was built in 1976, making it 49 years old in 2025.
What condition is US 63 N over Grindstone CR 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 2023.
How much traffic does US 63 N over Grindstone CR carry?
About 24,618 vehicles per day (2024 count), of which roughly 8% are trucks.
How long is US 63 N over Grindstone CR?
The structure is 253 ft (77.1 m) long with a longest span of 98 ft (29.9 m) and a deck 42 ft wide.
Who owns US 63 N over Grindstone CR?
It is owned by the State Highway Agency.