1L 15 over Silver Creek
GoodSt. Clair County, Illinois · 2.5 MI E Freeburg · Structure no. 082029500000000
- Built
- 1993
- 32 years old
- Condition
- Good
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 365 ft
- 3 main spans
- Daily traffic
- 2,600
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
1L 15 over Silver Creek is a steel continuous stringer/multi-beam or girder carrying 1L 15 over Silver Creek in St. Clair County, Illinois. It was built in 1993, so it is 32 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 2,600 vehicles a day, roughly 11% of them trucks, projected to reach 2,828 by 2046. The structure is 365 ft (111.3 m) long and 39 ft wide. If it were closed, the detour would be 32.9 mi (53 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 1L 15 over Silver Creek built?
It was built in 1993, making it 32 years old in 2025.
What condition is 1L 15 over Silver 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 March 2024.
How much traffic does 1L 15 over Silver Creek carry?
About 2,600 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is 1L 15 over Silver Creek?
The structure is 365 ft (111.3 m) long with a longest span of 134 ft (40.8 m) and a deck 39 ft wide.
Who owns 1L 15 over Silver Creek?
It is owned by the State Highway Agency.