I-270 WB over St. Thomas RD NSRR
FairMadison County, Illinois · 1/2 MI E of Il 3 · Structure no. 060004100000000
- Built
- 1962
- 63 years old, rebuilt 1998
- Condition
- Fair
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 249 ft
- 4 main spans
- Daily traffic
- 22,600
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-270 WB over St. Thomas RD NSRR is a steel continuous stringer/multi-beam or girder carrying I-270 WB over St. Thomas RD NSRR in Madison County, Illinois. It was built in 1962 and reconstructed in 1998, so it is 63 years old, older than the Illinois average of 45.3 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 22,600 vehicles a day, roughly 21% of them trucks, projected to reach 24,931 by 2046. The structure is 249 ft (75.9 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-270 WB over St. Thomas RD NSRR built?
It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1998.
What condition is I-270 WB over St. Thomas RD NSRR 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 January 2024.
How much traffic does I-270 WB over St. Thomas RD NSRR carry?
About 22,600 vehicles per day (2023 count), of which roughly 21% are trucks.
How long is I-270 WB over St. Thomas RD NSRR?
The structure is 249 ft (75.9 m) long with a longest span of 69 ft (21 m) and a deck 44 ft wide.
Who owns I-270 WB over St. Thomas RD NSRR?
It is owned by the State Highway Agency.