ST Clair Ave WB over Harding Ditch
GoodSt. Clair County, Illinois · 1.5 M W Ill 157 · Structure no. 082003400000000
- Built
- 1940
- 85 years old, rebuilt 1986
- Condition
- Good
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 54 ft
- 1 main span
- Daily traffic
- 5,900
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
ST Clair Ave WB over Harding Ditch is a steel stringer/multi-beam or girder carrying ST Clair Ave WB over Harding Ditch in St. Clair County, Illinois. It was built in 1940 and reconstructed in 1986, so it is 85 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 5,900 vehicles a day, roughly 3% of them trucks, projected to reach 6,060 by 2046. The structure is 54 ft (16.4 m) long and 39 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. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was ST Clair Ave WB over Harding Ditch built?
It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1986.
What condition is ST Clair Ave WB over Harding Ditch 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 September 2024.
How much traffic does ST Clair Ave WB over Harding Ditch carry?
About 5,900 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is ST Clair Ave WB over Harding Ditch?
The structure is 54 ft (16.4 m) long with a longest span of 50 ft (15.3 m) and a deck 39 ft wide.
Who owns ST Clair Ave WB over Harding Ditch?
It is owned by the State Highway Agency.