Is 55 N over US 61
FairJefferson County, Missouri · S 28 T 40 N R 6 E · Structure no. 1907
- Built
- 1969
- 56 years old, rebuilt 2009
- Condition
- Fair
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 127 ft
- 3 main spans
- Daily traffic
- 13,508
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Is 55 N over US 61 is a steel continuous stringer/multi-beam or girder carrying Is 55 N over US 61 in Jefferson County, Missouri. It was built in 1969 and reconstructed in 2009, so it is 56 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 13,508 vehicles a day, roughly 36% of them trucks, projected to reach 24,990 by 2044. The structure is 127 ft (38.7 m) long and 41 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 US 61 built?
It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2009.
What condition is Is 55 N over US 61 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 US 61 carry?
About 13,508 vehicles per day (2024 count), of which roughly 36% are trucks.
How long is Is 55 N over US 61?
The structure is 127 ft (38.7 m) long with a longest span of 59 ft (18 m) and a deck 41 ft wide.
Who owns Is 55 N over US 61?
It is owned by the State Highway Agency.