Is 55 N over BNSF RR
FairJefferson County, Missouri · S 420 T 41 N R 6 E · Structure no. 834
- Built
- 1965
- 60 years old, rebuilt 2001
- Condition
- Fair
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 300 ft
- 3 main spans
- Daily traffic
- 43,542
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Is 55 N over BNSF RR is a steel continuous stringer/multi-beam or girder carrying Is 55 N over BNSF RR in Jefferson County, Missouri. It was built in 1965 and reconstructed in 2001, so it is 60 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 43,542 vehicles a day, roughly 17% of them trucks, projected to reach 80,553 by 2044. The structure is 300 ft (91.4 m) long and 44 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Is 55 N over BNSF RR built?
It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2001.
What condition is Is 55 N over BNSF 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 2024.
How much traffic does Is 55 N over BNSF RR carry?
About 43,542 vehicles per day (2024 count), of which roughly 17% are trucks.
How long is Is 55 N over BNSF RR?
The structure is 300 ft (91.4 m) long with a longest span of 112 ft (34.1 m) and a deck 44 ft wide.
Who owns Is 55 N over BNSF RR?
It is owned by the State Highway Agency.