Mo 171 N over Mna RR
FairJasper County, Missouri · S 17 T 28 N R 32 W · Structure no. 2913
- Built
- 1977
- 48 years old
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 261 ft
- 5 main spans
- Daily traffic
- 8,948
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 171 N over Mna RR is a prestressed concrete continuous stringer/multi-beam or girder carrying Mo 171 N over Mna RR in Jasper County, Missouri. It was built in 1977, so it is 48 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 8,948 vehicles a day, roughly 5% of them trucks, projected to reach 13,869 by 2044. The structure is 261 ft (79.6 m) long and 43 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo 171 N over Mna RR built?
It was built in 1977, making it 48 years old in 2025.
What condition is Mo 171 N over Mna RR 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 August 2023.
How much traffic does Mo 171 N over Mna RR carry?
About 8,948 vehicles per day (2024 count), of which roughly 5% are trucks.
How long is Mo 171 N over Mna RR?
The structure is 261 ft (79.6 m) long with a longest span of 66 ft (20.1 m) and a deck 43 ft wide.
Who owns Mo 171 N over Mna RR?
It is owned by the State Highway Agency.