Ill 111 over Cahokia Diversn Cnl
FairMadison County, Illinois · 3 M N 270 · Structure no. 060012100000000
- Built
- 1940
- 85 years old, rebuilt 1987
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 387 ft
- 4 main spans
- Daily traffic
- 4,000
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ill 111 over Cahokia Diversn Cnl is a steel continuous stringer/multi-beam or girder carrying Ill 111 over Cahokia Diversn Cnl in Madison County, Illinois. It was built in 1940 and reconstructed in 1987, 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 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 4,000 vehicles a day, roughly 13% of them trucks, projected to reach 4,387 by 2046. The structure is 387 ft (118 m) long and 43 ft wide. If it were closed, the detour would be 24.2 mi (39 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ill 111 over Cahokia Diversn Cnl built?
It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1987.
What condition is Ill 111 over Cahokia Diversn Cnl 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 April 2023.
How much traffic does Ill 111 over Cahokia Diversn Cnl carry?
About 4,000 vehicles per day (2023 count), of which roughly 13% are trucks.
How long is Ill 111 over Cahokia Diversn Cnl?
The structure is 387 ft (118 m) long with a longest span of 106 ft (32.3 m) and a deck 43 ft wide.
Who owns Ill 111 over Cahokia Diversn Cnl?
It is owned by the State Highway Agency.