31st ST over Salt Creek
Fair Condition99 years old18,200 vehicles/day
Location
| State | Illinois |
| County | Cook |
| Location | 0.5 M W US 45 |
| Carries | 31st ST |
| Crosses | Salt Creek |
| Coordinates | 41.83401, -87.88341 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 141.1 ft (43 m) |
| Max Span | 45.9 ft (14 m) |
| Deck Width | 64.0 ft (19.5 m) |
| Deck Area | 838.5 sq m |
| Main Spans | 3 |
| Year Built | 1927 (reconstructed 1984) |
Traffic
| Avg Daily Traffic | 18,200 (2023) |
| Truck Traffic | 2% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | 124 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 016086800000000 |