Ill 177 over Rayhills Slough
Fair Condition106 years old2,000 vehicles/day
Location
| State | Illinois |
| County | St. Clair |
| Location | 3.1 M E Jct Ill 4 |
| Carries | Ill 177 |
| Crosses | Rayhills Slough |
| Coordinates | 38.48068, -89.73697 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 53.1 ft (16.2 m) |
| Max Span | 24.9 ft (7.6 m) |
| Deck Width | 34.4 ft (10.5 m) |
| Deck Area | 170.1 sq m |
| Main Spans | 2 |
| Year Built | 1920 (reconstructed 1953) |
Traffic
| Avg Daily Traffic | 2,000 (2023) |
| Truck Traffic | 12% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 082006600000000 |