Mo 49 S over Concannon CR
FairIron County, Missouri · S 3 T 31 N R 3 E · Structure no. 4496
- Built
- 1922
- 103 years old, rebuilt 1929
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 42 ft
- 1 main span
- Daily traffic
- 1,237
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 49 S over Concannon CR is a steel stringer/multi-beam or girder carrying Mo 49 S over Concannon CR in Iron County, Missouri. It was built in 1922 and reconstructed in 1929, so it is 103 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 5 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 1,237 vehicles a day, roughly 15% of them trucks, projected to reach 1,856 by 2044. The structure is 42 ft (12.8 m) long and 22 ft wide. If it were closed, the detour would be 52.2 mi (84 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Mo 49 S over Concannon CR built?
It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1929.
What condition is Mo 49 S over Concannon 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 October 2023.
How much traffic does Mo 49 S over Concannon CR carry?
About 1,237 vehicles per day (2024 count), of which roughly 15% are trucks.
How long is Mo 49 S over Concannon CR?
The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 22 ft wide.
Who owns Mo 49 S over Concannon CR?
It is owned by the State Highway Agency.