Il 163 over S Prairie Dupont Ck
GoodSt. Clair County, Illinois · 2MI N of Milstadt · Structure no. 082030500000000
- Built
- 2006
- 19 years old
- Condition
- Good
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 103 ft
- 1 main span
- Daily traffic
- 3,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 163 over S Prairie Dupont Ck is a prestressed concrete stringer/multi-beam or girder carrying Il 163 over S Prairie Dupont Ck in St. Clair County, Illinois. It was built in 2006, so it is 19 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 3,500 vehicles a day, roughly 9% of them trucks, projected to reach 3,990 by 2046. The structure is 103 ft (31.4 m) long and 43 ft wide. If it were closed, the detour would be 19.3 mi (31 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 | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 163 over S Prairie Dupont Ck built?
It was built in 2006, making it 19 years old in 2025.
What condition is Il 163 over S Prairie Dupont Ck 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 August 2023.
How much traffic does Il 163 over S Prairie Dupont Ck carry?
About 3,500 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is Il 163 over S Prairie Dupont Ck?
The structure is 103 ft (31.4 m) long with a longest span of 103 ft (31.4 m) and a deck 43 ft wide.
Who owns Il 163 over S Prairie Dupont Ck?
It is owned by the State Highway Agency.