Is 55 S over Mo Pac RR
FairPosted for loadSt. Louis city, Missouri · S 17 T 44 N R 7 E · Structure no. 1053
- Built
- 1963
- 62 years old, rebuilt 2022
- Condition
- Fair
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 650 ft
- 8 main spans
- Daily traffic
- 44,181
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Is 55 S over Mo Pac RR is a steel continuous stringer/multi-beam or girder carrying Is 55 S over Mo Pac RR in St. Louis city, Missouri. It was built in 1963 and reconstructed in 2022, so it is 62 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. Its operating status is: posted for load restriction.
It carries about 44,181 vehicles a day, roughly 12% of them trucks, projected to reach 55,226 by 2044. The structure is 650 ft (198.1 m) long and 73 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Is 55 S over Mo Pac RR built?
It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2022.
What condition is Is 55 S over Mo Pac 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 November 2023.
How much traffic does Is 55 S over Mo Pac RR carry?
About 44,181 vehicles per day (2024 count), of which roughly 12% are trucks.
How long is Is 55 S over Mo Pac RR?
The structure is 650 ft (198.1 m) long with a longest span of 103 ft (31.4 m) and a deck 73 ft wide.
Who owns Is 55 S over Mo Pac RR?
It is owned by the State Highway Agency.