Il 173 over Willow Creek
GoodBoone County, Illinois · 0.3 MI E Winn. CO LN · Structure no. 004200600000000
- Built
- 1994
- 31 years old
- Condition
- Good
- inspected February 2023
- Type
- Culvert
- Concrete
- Length
- 26 ft
- 2 main spans
- Daily traffic
- 6,250
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Il 173 over Willow Creek is a concrete culvert carrying Il 173 over Willow Creek in Boone 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 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 6,250 vehicles a day, roughly 8% of them trucks, projected to reach 6,656 by 2046. The structure is 26 ft (8 m) long and 38 ft wide. If it were closed, the detour would be 18 mi (29 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Il 173 over Willow Creek built?
It was built in 1994, making it 31 years old in 2025.
What condition is Il 173 over Willow 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 February 2023.
How much traffic does Il 173 over Willow Creek carry?
About 6,250 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is Il 173 over Willow Creek?
The structure is 26 ft (8 m) long with a longest span of 12 ft (3.8 m) and a deck 38 ft wide.
Who owns Il 173 over Willow Creek?
It is owned by the State Highway Agency.