Il 171 (1st Ave) over Silver Creek
Fair Condition92 years old27,400 vehicles/day
Location
| State | Illinois |
| County | Cook |
| Location | 0.6 M N Lake ST |
| Carries | Il 171 (1st Ave) |
| Crosses | Silver Creek |
| Coordinates | 41.89804, -87.83521 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 33.1 ft (10.1 m) |
| Max Span | 30.8 ft (9.4 m) |
| Deck Width | 60.0 ft (18.3 m) |
| Deck Area | 184.8 sq m |
| Main Spans | 1 |
| Year Built | 1934 (reconstructed 1989) |
Traffic
| Avg Daily Traffic | 27,400 (2023) |
| Truck Traffic | 6% |
| Lanes On Bridge | 4 |
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 | 016069800000000 |