Mo 21 S over Minor CR
GoodIron County, Missouri · S 14 T 33 N R 3 E · Structure no. 3635
- Built
- 1985
- 40 years old
- Condition
- Good
- inspected October 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 36 ft
- 3 main spans
- Daily traffic
- 3,513
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 21 S over Minor CR is a concrete continuous culvert carrying Mo 21 S over Minor CR in Iron County, Missouri. It was built in 1985, so it is 40 years old, younger 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 3,513 vehicles a day, roughly 18% of them trucks, projected to reach 5,270 by 2044. The structure is 36 ft (11 m) long. If it were closed, the detour would be 46 mi (74 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 | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo 21 S over Minor CR built?
It was built in 1985, making it 40 years old in 2025.
What condition is Mo 21 S over Minor 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 October 2023.
How much traffic does Mo 21 S over Minor CR carry?
About 3,513 vehicles per day (2024 count), of which roughly 18% are trucks.
How long is Mo 21 S over Minor CR?
The structure is 36 ft (11 m) long with a longest span of 10 ft (3 m).
Who owns Mo 21 S over Minor CR?
It is owned by the State Highway Agency.