Is 255 S over Is 55 Is 55 Rp IS270
FairSt. Louis County, Missouri · S 34 T 43 N R 6 E · Structure no. 1014
- Built
- 1964
- 61 years old, rebuilt 1991
- Condition
- Fair
- inspected July 2024
- Type
- Box Beam or Girders - Single or Spread
- Concrete Continuous
- Length
- 314 ft
- 5 main spans
- Daily traffic
- 41,474
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Is 255 S over Is 55 Is 55 Rp IS270 is a concrete continuous box beam or girders - single or spread carrying Is 255 S over Is 55 Is 55 Rp IS270 in St. Louis County, Missouri. It was built in 1964 and reconstructed in 1991, so it is 61 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 41,474 vehicles a day, roughly 18% of them trucks, projected to reach 51,843 by 2044. The structure is 314 ft (95.7 m) long and 59 ft wide. If it were closed, the detour would be 18 mi (29 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 | 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 255 S over Is 55 Is 55 Rp IS270 built?
It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1991.
What condition is Is 255 S over Is 55 Is 55 Rp IS270 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 July 2024.
How much traffic does Is 255 S over Is 55 Is 55 Rp IS270 carry?
About 41,474 vehicles per day (2024 count), of which roughly 18% are trucks.
How long is Is 255 S over Is 55 Is 55 Rp IS270?
The structure is 314 ft (95.7 m) long with a longest span of 80 ft (24.4 m) and a deck 59 ft wide.
Who owns Is 255 S over Is 55 Is 55 Rp IS270?
It is owned by the State Highway Agency.