Mo 51 S over Is 55
PoorPerry County, Missouri · S 843 T 35 N R 10 E · Structure no. 2138
- Built
- 1970
- 55 years old, rebuilt 1984
- Condition
- Poor
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 295 ft
- 4 main spans
- Daily traffic
- 10,761
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 51 S over Is 55 is a steel continuous stringer/multi-beam or girder carrying Mo 51 S over Is 55 in Perry County, Missouri. It was built in 1970 and reconstructed in 1984, so it is 55 years old, older than the Missouri average of 45.1 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 10,761 vehicles a day, roughly 11% of them trucks, projected to reach 14,527 by 2044. The structure is 295 ft (89.9 m) long and 47 ft wide. If it were closed, the detour would be 24.2 mi (39 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo 51 S over Is 55 built?
It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1984.
What condition is Mo 51 S over Is 55 in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.
How much traffic does Mo 51 S over Is 55 carry?
About 10,761 vehicles per day (2024 count), of which roughly 11% are trucks.
How long is Mo 51 S over Is 55?
The structure is 295 ft (89.9 m) long with a longest span of 104 ft (31.7 m) and a deck 47 ft wide.
Who owns Mo 51 S over Is 55?
It is owned by the State Highway Agency.