Ill 40 over Johnson Creek
FairCarroll County, Illinois · 1.5 MI E of Ill 78 · Structure no. 008003300000000
- Built
- 1984
- 41 years old, rebuilt 2019
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 73 ft
- 1 main span
- Daily traffic
- 800
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ill 40 over Johnson Creek is a steel continuous stringer/multi-beam or girder carrying Ill 40 over Johnson Creek in Carroll County, Illinois. It was built in 1984 and reconstructed in 2019, so it is 41 years old, younger 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 800 vehicles a day, roughly 4% of them trucks, projected to reach 808 by 2046. The structure is 73 ft (22.4 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Ill 40 over Johnson Creek built?
It was built in 1984, making it 41 years old in 2025. It was reconstructed in 2019.
What condition is Ill 40 over Johnson Creek 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 August 2023.
How much traffic does Ill 40 over Johnson Creek carry?
About 800 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Ill 40 over Johnson Creek?
The structure is 73 ft (22.4 m) long with a longest span of 69 ft (21 m) and a deck 35 ft wide.
Who owns Ill 40 over Johnson Creek?
It is owned by the State Highway Agency.