Il 173 over Willow Creek
Good Condition32 years old6,250 vehicles/day
Location
| State | Illinois |
| County | Boone |
| Location | 0.3 Mi E Winn. Co LN |
| Carries | Il 173 |
| Crosses | Willow Creek |
| Coordinates | 42.37030, -88.93444 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 5 (Fair) |
| Culvert | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Culvert |
| Total Length | 26.2 ft (8 m) |
| Max Span | 12.5 ft (3.8 m) |
| Deck Width | 38.1 ft (11.6 m) |
| Deck Area | 92.8 sq m |
| Main Spans | 2 |
| Year Built | 1994 |
Traffic
| Avg Daily Traffic | 6,250 (2023) |
| Truck Traffic | 8% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 223 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 004200600000000 |