Is 55 N over Isle Dubois CR
FairSte. Genevieve County, Missouri · S 29 T 39 N R 7 E · Structure no. 1946
- Built
- 1970
- 55 years old, rebuilt 1984
- Condition
- Fair
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 202 ft
- 5 main spans
- Daily traffic
- 13,508
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Is 55 N over Isle Dubois CR is a steel continuous stringer/multi-beam or girder carrying Is 55 N over Isle Dubois CR in Ste. Genevieve 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 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 25,665 by 2044. The structure is 202 ft (61.6 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 | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Is 55 N over Isle Dubois CR built?
It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1984.
What condition is Is 55 N over Isle Dubois CR 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 October 2024.
How much traffic does Is 55 N over Isle Dubois CR carry?
About 13,508 vehicles per day (2024 count), of which roughly 36% are trucks.
How long is Is 55 N over Isle Dubois CR?
The structure is 202 ft (61.6 m) long with a longest span of 44 ft (13.4 m) and a deck 41 ft wide.
Who owns Is 55 N over Isle Dubois CR?
It is owned by the State Highway Agency.