Ill 15 WB over Ill 159
GoodSt. Clair County, Illinois · 0.30MI S Il 158&177 · Structure no. 082004700000000
- Built
- 1957
- 68 years old, rebuilt 2001
- Condition
- Good
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 472 ft
- 4 main spans
- Daily traffic
- 12,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ill 15 WB over Ill 159 is a steel continuous stringer/multi-beam or girder carrying Ill 15 WB over Ill 159 in St. Clair County, Illinois. It was built in 1957 and reconstructed in 2001, so it is 68 years old, older than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 12,500 vehicles a day, roughly 10% of them trucks, projected to reach 6,010 by 2046. The structure is 472 ft (143.9 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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 Ill 15 WB over Ill 159 built?
It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2001.
What condition is Ill 15 WB over Ill 159 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.
How much traffic does Ill 15 WB over Ill 159 carry?
About 12,500 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is Ill 15 WB over Ill 159?
The structure is 472 ft (143.9 m) long with a longest span of 130 ft (39.6 m) and a deck 36 ft wide.
Who owns Ill 15 WB over Ill 159?
It is owned by the State Highway Agency.