Ill 178 over Clark Run
Fair Condition50 years old4,150 vehicles/day
Location
| State | Illinois |
| County | LaSalle |
| Location | 1.11 Mi S Of US 6 |
| Carries | Ill 178 |
| Crosses | Clark Run |
| Coordinates | 41.34525, -89.01163 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 35.1 ft (10.7 m) |
| Max Span | 33.8 ft (10.3 m) |
| Deck Width | 42.0 ft (12.8 m) |
| Deck Area | 137.0 sq m |
| Main Spans | 1 |
| Year Built | 1976 |
Traffic
| Avg Daily Traffic | 4,150 (2023) |
| Truck Traffic | 17% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | December 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 050017900000000 |