Ill 15 over Harding Ditch
Fair Condition86 years old30,000 vehicles/day
Location
| State | Illinois |
| County | St. Clair |
| Location | 0.3 M W Jct 157 |
| Carries | Ill 15 |
| Crosses | Harding Ditch |
| Coordinates | 38.57014, -90.09423 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 8 (Very Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 157.2 ft (47.9 m) |
| Max Span | 60.0 ft (18.3 m) |
| Deck Width | 71.2 ft (21.7 m) |
| Deck Area | 1039.4 sq m |
| Main Spans | 3 |
| Year Built | 1940 (reconstructed 1984) |
Traffic
| Avg Daily Traffic | 30,000 (2023) |
| Truck Traffic | 6% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | 324 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 082003900000000 |