US 61 S over Is 255
FairSt. Louis County, Missouri · S 34 T 44 N R 6 E · Structure no. 29668
- Built
- 2004
- 21 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 381 ft
- 4 main spans
- Daily traffic
- 17,266
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US 61 S over Is 255 is a steel continuous stringer/multi-beam or girder carrying US 61 S over Is 255 in St. Louis County, Missouri. It was built in 2004, so it is 21 years old, younger 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 17,266 vehicles a day, roughly 3% of them trucks, projected to reach 24,172 by 2044. The structure is 381 ft (116.1 m) long and 97 ft wide. If it were closed, the detour would be 11.2 mi (18 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 61 S over Is 255 built?
It was built in 2004, making it 21 years old in 2025.
What condition is US 61 S over Is 255 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 US 61 S over Is 255 carry?
About 17,266 vehicles per day (2024 count), of which roughly 3% are trucks.
How long is US 61 S over Is 255?
The structure is 381 ft (116.1 m) long with a longest span of 107 ft (32.6 m) and a deck 97 ft wide.
Who owns US 61 S over Is 255?
It is owned by the State Highway Agency.