Il 23 over Somonauk Creek
GoodDeKalb County, Illinois · 2.3 Mi. S. of US 30 · Structure no. 019201500000000
- Built
- 1994
- 31 years old
- Condition
- Good
- inspected March 2021
- Type
- Culvert
- Concrete
- Length
- 26 ft
- 2 main spans
- Daily traffic
- 2,150
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 23 over Somonauk Creek is a concrete culvert carrying Il 23 over Somonauk Creek in DeKalb County, Illinois. It was built in 1994, so it is 31 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 2,150 vehicles a day, roughly 13% of them trucks, projected to reach 2,520 by 2046. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 31.7 mi (51 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 23 over Somonauk Creek built?
It was built in 1994, making it 31 years old in 2025.
What condition is Il 23 over Somonauk 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 2021.
How much traffic does Il 23 over Somonauk Creek carry?
About 2,150 vehicles per day (2023 count), of which roughly 13% are trucks.
How long is Il 23 over Somonauk Creek?
The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m).
Who owns Il 23 over Somonauk Creek?
It is owned by the State Highway Agency.