Il 171 SB First Av over I- 55 Stevenson
Good Condition11 years old39,600 vehicles/day
Location
| State | Illinois |
| County | Cook |
| Location | 1.4m SW Of Il43 |
| Carries | Il 171 SB First Av |
| Crosses | I- 55 Stevenson |
| Coordinates | 41.79337, -87.82081 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 8 (Very Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 258.9 ft (78.9 m) |
| Max Span | 92.2 ft (28.1 m) |
| Deck Width | 59.7 ft (18.2 m) |
| Deck Area | 1436.0 sq m |
| Main Spans | 3 |
| Year Built | 2015 |
Traffic
| Avg Daily Traffic | 39,600 (2023) |
| Truck Traffic | 9% |
| Lanes On Bridge | 3 |
| Lanes Under Bridge | 7 |
Inspection & Ownership
| Last Inspection | November 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 016151000000000 |