Mo 21 S over Salt Pine CR
GoodWashington County, Missouri · S 3039 T 39 N R 3 E · Structure no. 4641
- Built
- 1923
- 102 years old, rebuilt 1933
- Condition
- Good
- inspected June 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 37 ft
- 2 main spans
- Daily traffic
- 5,370
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 21 S over Salt Pine CR is a concrete continuous culvert carrying Mo 21 S over Salt Pine CR in Washington County, Missouri. It was built in 1923 and reconstructed in 1933, so it is 102 years old, older than the Missouri average of 45.1 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 5,370 vehicles a day, roughly 9% of them trucks, projected to reach 10,203 by 2044. The structure is 37 ft (11.2 m) long and 61 ft wide. If it were closed, the detour would be 21.1 mi (34 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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo 21 S over Salt Pine CR built?
It was built in 1923, making it 102 years old in 2025. It was reconstructed in 1933.
What condition is Mo 21 S over Salt Pine CR 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 June 2024.
How much traffic does Mo 21 S over Salt Pine CR carry?
About 5,370 vehicles per day (2024 count), of which roughly 9% are trucks.
How long is Mo 21 S over Salt Pine CR?
The structure is 37 ft (11.2 m) long with a longest span of 13 ft (3.9 m) and a deck 61 ft wide.
Who owns Mo 21 S over Salt Pine CR?
It is owned by the State Highway Agency.