Ill 84 over Plum River
FairCarroll County, Illinois · 1.0 MI S JCT Ill 64 · Structure no. 008002800000000
- Built
- 1978
- 47 years old, rebuilt 2024
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 356 ft
- 7 main spans
- Daily traffic
- 4,200
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ill 84 over Plum River is a steel continuous stringer/multi-beam or girder carrying Ill 84 over Plum River in Carroll County, Illinois. It was built in 1978 and reconstructed in 2024, so it is 47 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 5 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 4,200 vehicles a day, roughly 9% of them trucks, projected to reach 4,545 by 2046. The structure is 356 ft (108.4 m) long and 46 ft wide. If it were closed, the detour would be 21.7 mi (35 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ill 84 over Plum River built?
It was built in 1978, making it 47 years old in 2025. It was reconstructed in 2024.
What condition is Ill 84 over 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 October 2023.
How much traffic does Ill 84 over Plum River carry?
About 4,200 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is Ill 84 over Plum River?
The structure is 356 ft (108.4 m) long with a longest span of 70 ft (21.3 m) and a deck 46 ft wide.
Who owns Ill 84 over Plum River?
It is owned by the State Highway Agency.