Il 78 over East Plum River
FairCarroll County, Illinois · 3 Mi. N. Mt Carroll · Structure no. 008004200000000
- Built
- 1995
- 30 years old
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 185 ft
- 4 main spans
- Daily traffic
- 625
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 78 over East Plum River is a prestressed concrete continuous stringer/multi-beam or girder carrying Il 78 over East Plum River in Carroll County, Illinois. It was built in 1995, so it is 30 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 625 vehicles a day, roughly 19% of them trucks, projected to reach 657 by 2046. The structure is 185 ft (56.4 m) long and 35 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 | 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 Il 78 over East Plum River built?
It was built in 1995, making it 30 years old in 2025.
What condition is Il 78 over East Plum River 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 May 2024.
How much traffic does Il 78 over East Plum River carry?
About 625 vehicles per day (2023 count), of which roughly 19% are trucks.
How long is Il 78 over East Plum River?
The structure is 185 ft (56.4 m) long with a longest span of 48 ft (14.5 m) and a deck 35 ft wide.
Who owns Il 78 over East Plum River?
It is owned by the State Highway Agency.