Williamson Rd/sbi over I-55
Fair Condition53 years old1,900 vehicles/day
Location
| State | Illinois |
| County | Macoupin |
| Location | .8m N Staunton Intch |
| Carries | Williamson Rd/sbi |
| Crosses | I-55 |
| Coordinates | 39.03176, -89.75371 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 253.9 ft (77.4 m) |
| Max Span | 101.0 ft (30.8 m) |
| Deck Width | 45.9 ft (14 m) |
| Deck Area | 1083.6 sq m |
| Main Spans | 2 |
| Year Built | 1973 |
Traffic
| Avg Daily Traffic | 1,900 (2023) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 059004400000000 |