Il 111 over Piasa Creek
Poor Condition97 years old4,200 vehicles/day
Location
| State | Illinois |
| County | Macoupin |
| Location | 0.2 M S Jct Il 16 |
| Carries | Il 111 |
| Crosses | Piasa Creek |
| Coordinates | 39.11357, -90.14178 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 5 (Fair) |
| Superstructure | 4 (Poor) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 52.2 ft (15.9 m) |
| Max Span | 49.9 ft (15.2 m) |
| Deck Width | 36.4 ft (11.1 m) |
| Deck Area | 176.5 sq m |
| Main Spans | 1 |
| Year Built | 1929 (reconstructed 1985) |
Traffic
| Avg Daily Traffic | 4,200 (2023) |
| Truck Traffic | 11% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 12 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 059001700000000 |