Ill 148 over Big Muddy River
FairWilliamson County, Illinois · 0.1 MI S Franklin CO · Structure no. 100003200000000
- Built
- 1931
- 94 years old, rebuilt 1984
- Condition
- Fair
- inspected January 2025
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 450 ft
- 6 main spans
- Daily traffic
- 3,650
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ill 148 over Big Muddy River is a steel continuous stringer/multi-beam or girder carrying Ill 148 over Big Muddy River in Williamson County, Illinois. It was built in 1931 and reconstructed in 1984, so it is 94 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 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 3,650 vehicles a day, roughly 4% of them trucks, projected to reach 4,444 by 2046. The structure is 450 ft (137.2 m) long and 35 ft wide. If it were closed, the detour would be 16.8 mi (27 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 148 over Big Muddy River built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1984.
What condition is Ill 148 over Big Muddy 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 January 2025.
How much traffic does Ill 148 over Big Muddy River carry?
About 3,650 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Ill 148 over Big Muddy River?
The structure is 450 ft (137.2 m) long with a longest span of 97 ft (29.6 m) and a deck 35 ft wide.
Who owns Ill 148 over Big Muddy River?
It is owned by the State Highway Agency.