Il 31 over US 20 By Pass
Poor Condition67 years old15,800 vehicles/day
Location
| State | Illinois |
| County | Kane |
| Location | 3 M S Of I-90 |
| Carries | Il 31 |
| Crosses | US 20 By Pass |
| Coordinates | 42.02190, -88.28347 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 4 (Poor) |
| Superstructure | 5 (Fair) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 71.9 ft (21.9 m) |
| Max Span | 67.3 ft (20.5 m) |
| Deck Width | 69.9 ft (21.3 m) |
| Deck Area | 466.5 sq m |
| Main Spans | 1 |
| Year Built | 1959 |
Traffic
| Avg Daily Traffic | 15,800 (2023) |
| Truck Traffic | 9% |
| Lanes On Bridge | 4 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 124 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 045001700000000 |