31st ST over Des Plaines River
Good Condition98 years old11,300 vehicles/day
Location
| State | Illinois |
| County | Cook |
| Location | 2.4 M E US 45 |
| Carries | 31st ST |
| Crosses | Des Plaines River |
| Coordinates | 41.83538, -87.82772 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 253.3 ft (77.2 m) |
| Max Span | 62.0 ft (18.9 m) |
| Deck Width | 60.0 ft (18.3 m) |
| Deck Area | 1412.8 sq m |
| Main Spans | 4 |
| Year Built | 1928 (reconstructed 1984) |
Traffic
| Avg Daily Traffic | 11,300 (2023) |
| Truck Traffic | 1% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 016087000000000 |