55th ST over Flag Creek
Fair Condition68 years old16,600 vehicles/day
Location
| State | Illinois |
| County | Cook |
| Location | 2 M W US 45 |
| Carries | 55th ST |
| Crosses | Flag Creek |
| Coordinates | 41.78965, -87.90615 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 179.5 ft (54.7 m) |
| Max Span | 78.1 ft (23.8 m) |
| Deck Width | 69.9 ft (21.3 m) |
| Deck Area | 1165.1 sq m |
| Main Spans | 3 |
| Year Built | 1958 (reconstructed 1992) |
Traffic
| Avg Daily Traffic | 16,600 (2022) |
| Truck Traffic | 4% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | 723 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 016103200000000 |