Ill 161 over Shoal Creek Overflow
FairClinton County, Illinois · 0.6 M E Germantown · Structure no. 014001000000000
- Built
- 1935
- 90 years old, rebuilt 1990
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 451 ft
- 9 main spans
- Daily traffic
- 4,250
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ill 161 over Shoal Creek Overflow is a steel continuous stringer/multi-beam or girder carrying Ill 161 over Shoal Creek Overflow in Clinton County, Illinois. It was built in 1935 and reconstructed in 1990, so it is 90 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 4,250 vehicles a day, roughly 8% of them trucks, projected to reach 4,400 by 2046. The structure is 451 ft (137.5 m) long and 35 ft wide. If it were closed, the detour would be 42.9 mi (69 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ill 161 over Shoal Creek Overflow built?
It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1990.
What condition is Ill 161 over Shoal Creek Overflow 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 April 2023.
How much traffic does Ill 161 over Shoal Creek Overflow carry?
About 4,250 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is Ill 161 over Shoal Creek Overflow?
The structure is 451 ft (137.5 m) long with a longest span of 51 ft (15.4 m) and a deck 35 ft wide.
Who owns Ill 161 over Shoal Creek Overflow?
It is owned by the State Highway Agency.