Il 31 over Mill Creek
Fair Condition91 years old21,500 vehicles/day
Location
| State | Illinois |
| County | Kane |
| Location | 1.1 M N Of Il 56 |
| Carries | Il 31 |
| Crosses | Mill Creek |
| Coordinates | 41.82198, -88.32540 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 44.9 ft (13.7 m) |
| Max Span | 40.7 ft (12.4 m) |
| Deck Width | 54.1 ft (16.5 m) |
| Deck Area | 226.1 sq m |
| Main Spans | 1 |
| Year Built | 1935 (reconstructed 2008) |
Traffic
| Avg Daily Traffic | 21,500 (2023) |
| Truck Traffic | 5% |
| Lanes On 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 | 045002000000000 |