TR-107A over Somonauk Creek
GoodLaSalle County, Illinois · N 42nd E 2520 · Structure no. 050361800000000
- Built
- 2018
- 7 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 120 ft
- 3 main spans
- Daily traffic
- 850
- 2020 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
TR-107A over Somonauk Creek is a steel continuous stringer/multi-beam or girder carrying TR-107A over Somonauk Creek in LaSalle County, Illinois. It was built in 2018, so it is 7 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 850 vehicles a day, roughly 6% of them trucks, projected to reach 859 by 2046. The structure is 120 ft (36.6 m) long and 33 ft wide.
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 TR-107A over Somonauk Creek built?
It was built in 2018, making it 7 years old in 2025.
What condition is TR-107A 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 July 2024.
How much traffic does TR-107A over Somonauk Creek carry?
About 850 vehicles per day (2020 count), of which roughly 6% are trucks.
How long is TR-107A over Somonauk Creek?
The structure is 120 ft (36.6 m) long with a longest span of 53 ft (16.2 m) and a deck 33 ft wide.
Who owns TR-107A over Somonauk Creek?
It is owned by the Town or Township Highway Agency.