Ill 161 over Richland Creek
GoodSt. Clair County, Illinois · .5 MI E Ill 159 · Structure no. 082027800000000
- Built
- 1987
- 38 years old
- Condition
- Good
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 191 ft
- 3 main spans
- Daily traffic
- 19,600
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ill 161 over Richland Creek is a prestressed concrete stringer/multi-beam or girder carrying Ill 161 over Richland Creek in St. Clair County, Illinois. It was built in 1987, so it is 38 years old, younger than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 19,600 vehicles a day, roughly 2% of them trucks, projected to reach 20,705 by 2046. The structure is 191 ft (58.3 m) long and 74 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| 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 161 over Richland Creek built?
It was built in 1987, making it 38 years old in 2025.
What condition is Ill 161 over Richland Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.
How much traffic does Ill 161 over Richland Creek carry?
About 19,600 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is Ill 161 over Richland Creek?
The structure is 191 ft (58.3 m) long with a longest span of 78 ft (23.8 m) and a deck 74 ft wide.
Who owns Ill 161 over Richland Creek?
It is owned by the State Highway Agency.