Ill 178 over Illinois River
Fair Condition6 years old3,200 vehicles/day
Location
| State | Illinois |
| County | LaSalle |
| Location | 2.2 Mi S Of US 6 |
| Carries | Ill 178 |
| Crosses | Illinois River |
| Coordinates | 41.32760, -89.01053 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 9 (Excellent) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 1159.4 ft (353.4 m) |
| Max Span | 440.0 ft (134.1 m) |
| Deck Width | 49.9 ft (15.2 m) |
| Deck Area | 5371.7 sq m |
| Main Spans | 3 |
| Year Built | 2020 |
Traffic
| Avg Daily Traffic | 3,200 (2023) |
| Truck Traffic | 8% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 050025600000000 |