I- 55 WB Rmp Il171 over Des Plaines River
Poor Condition63 years old5,300 vehicles/day
Location
| State | Illinois |
| County | Cook |
| Location | 1.3 M SW Il 43 |
| Carries | I- 55 WB Rmp Il171 |
| Crosses | Des Plaines River |
| Coordinates | 41.79565, -87.82258 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 6 (Satisfactory) |
| Superstructure | 3 (Serious) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 873.0 ft (266.1 m) |
| Max Span | 110.9 ft (33.8 m) |
| Deck Width | 29.2 ft (8.9 m) |
| Deck Area | 2368.3 sq m |
| Main Spans | 8 |
| Year Built | 1963 (reconstructed 1994) |
Traffic
| Avg Daily Traffic | 5,300 (2023) |
| Truck Traffic | 9% |
| Lanes On Bridge | 1 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 12 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 016098700000000 |