Il 171 NB First Av over Rr - Cn
Fair Condition63 years old39,600 vehicles/day
Location
| State | Illinois |
| County | Cook |
| Location | 0.3 M SE I-55 |
| Carries | Il 171 NB First Av |
| Crosses | Rr - Cn |
| Coordinates | 41.79145, -87.81569 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 8 (Very Good) |
| Superstructure | 5 (Fair) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 166.3 ft (50.7 m) |
| Max Span | 61.7 ft (18.8 m) |
| Deck Width | 56.1 ft (17.1 m) |
| Deck Area | 867.0 sq m |
| Main Spans | 3 |
| Year Built | 1963 (reconstructed 2016) |
Traffic
| Avg Daily Traffic | 39,600 (2023) |
| Truck Traffic | 9% |
| Lanes On Bridge | 3 |
Inspection & Ownership
| Last Inspection | 623 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 016048900000000 |