Ill 166 over S Fork Saline Relief
Fair Condition92 years old3,000 vehicles/day
Location
| State | Illinois |
| County | Williamson |
| Location | 3.3 Mi S Of Ill 13 |
| Carries | Ill 166 |
| Crosses | S Fork Saline Relief |
| Coordinates | 37.68197, -88.85947 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 5 (Fair) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 156.5 ft (47.7 m) |
| Max Span | 52.2 ft (15.9 m) |
| Deck Width | 35.1 ft (10.7 m) |
| Deck Area | 510.4 sq m |
| Main Spans | 3 |
| Year Built | 1934 (reconstructed 1991) |
Traffic
| Avg Daily Traffic | 3,000 (2023) |
| Truck Traffic | 6% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 624 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 100002900000000 |