Ill 111 SB over Cahokia Canal
PoorMadison County, Illinois · 0.24 MI N I-55/70 · Structure no. 060012700000000
- Built
- 1961
- 64 years old
- Condition
- Poor
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 317 ft
- 3 main spans
- Daily traffic
- 4,050
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ill 111 SB over Cahokia Canal is a steel continuous stringer/multi-beam or girder carrying Ill 111 SB over Cahokia Canal in Madison County, Illinois. It was built in 1961, so it is 64 years old, older than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 4,050 vehicles a day, roughly 12% of them trucks, projected to reach 2,194 by 2046. The structure is 317 ft (96.7 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
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ill 111 SB over Cahokia Canal built?
It was built in 1961, making it 64 years old in 2025.
What condition is Ill 111 SB over Cahokia Canal in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.
How much traffic does Ill 111 SB over Cahokia Canal carry?
About 4,050 vehicles per day (2023 count), of which roughly 12% are trucks.
How long is Ill 111 SB over Cahokia Canal?
The structure is 317 ft (96.7 m) long with a longest span of 121 ft (37 m) and a deck 36 ft wide.
Who owns Ill 111 SB over Cahokia Canal?
It is owned by the State Highway Agency.