Il 78 over East Johnson Creek
FairCarroll County, Illinois · 4 Mi. S. Mt Carroll · Structure no. 008004300000000
- Built
- 1996
- 29 years old
- Condition
- Fair
- inspected October 2022
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 77 ft
- 1 main span
- Daily traffic
- 1,550
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 78 over East Johnson Creek is a prestressed concrete stringer/multi-beam or girder carrying Il 78 over East Johnson Creek in Carroll County, Illinois. It was built in 1996, so it is 29 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 1,550 vehicles a day, roughly 17% of them trucks, projected to reach 1,717 by 2046. The structure is 77 ft (23.6 m) long and 39 ft wide. If it were closed, the detour would be 18 mi (29 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 | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 78 over East Johnson Creek built?
It was built in 1996, making it 29 years old in 2025.
What condition is Il 78 over East 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 October 2022.
How much traffic does Il 78 over East Johnson Creek carry?
About 1,550 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is Il 78 over East Johnson Creek?
The structure is 77 ft (23.6 m) long with a longest span of 75 ft (22.9 m) and a deck 39 ft wide.
Who owns Il 78 over East Johnson Creek?
It is owned by the State Highway Agency.