Pinnacles RD over Silver Fork CR
FairBoone County, Missouri · S 12 T 50 N R 12 W · Structure no. 17799
- Built
- 1975
- 50 years old
- Condition
- Fair
- inspected December 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 98 ft
- 2 main spans
- Daily traffic
- 300
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Pinnacles RD over Silver Fork CR is a steel stringer/multi-beam or girder carrying Pinnacles RD over Silver Fork CR in Boone County, Missouri. It was built in 1975, so it is 50 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.
It carries about 300 vehicles a day, roughly 2% of them trucks, projected to reach 570 by 2043. The structure is 98 ft (29.9 m) long and 22 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Pinnacles RD over Silver Fork CR built?
It was built in 1975, making it 50 years old in 2025.
What condition is Pinnacles RD over Silver Fork 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 December 2024.
How much traffic does Pinnacles RD over Silver Fork CR carry?
About 300 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is Pinnacles RD over Silver Fork CR?
The structure is 98 ft (29.9 m) long with a longest span of 75 ft (22.9 m) and a deck 22 ft wide.
Who owns Pinnacles RD over Silver Fork CR?
It is owned by the County Highway Agency.