Ill Rt 78 over Muddy Plum River
FairJo Daviess County, Illinois · 2.5 MI N Carroll Co. · Structure no. 043004100000000
- Built
- 1982
- 43 years old
- Condition
- Fair
- inspected August 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 133 ft
- 3 main spans
- Daily traffic
- 600
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ill Rt 78 over Muddy Plum River is a prestressed concrete box beam or girders - multiple carrying Ill Rt 78 over Muddy Plum River in Jo Daviess County, Illinois. It was built in 1982, so it is 43 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 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 600 vehicles a day, roughly 13% of them trucks, projected to reach 556 by 2046. The structure is 133 ft (40.5 m) long and 36 ft wide. If it were closed, the detour would be 34.8 mi (56 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 | 7 Good | Some minor problems. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ill Rt 78 over Muddy Plum River built?
It was built in 1982, making it 43 years old in 2025.
What condition is Ill Rt 78 over Muddy 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 August 2023.
How much traffic does Ill Rt 78 over Muddy Plum River carry?
About 600 vehicles per day (2023 count), of which roughly 13% are trucks.
How long is Ill Rt 78 over Muddy Plum River?
The structure is 133 ft (40.5 m) long with a longest span of 43 ft (13.1 m) and a deck 36 ft wide.
Who owns Ill Rt 78 over Muddy Plum River?
It is owned by the State Highway Agency.