Duffy Road over Somonauk Creek
Fair Condition43 years old25 vehicles/day
Location
| State | Illinois |
| County | DeKalb |
| Location | 1000n 1075e |
| Carries | Duffy Road |
| Crosses | Somonauk Creek |
| Coordinates | 41.77614, -88.73949 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 59.1 ft (18 m) |
| Max Span | 57.1 ft (17.4 m) |
| Deck Width | 27.9 ft (8.5 m) |
| Deck Area | 153 sq m |
| Main Spans | 1 |
| Year Built | 1983 |
Traffic
| Avg Daily Traffic | 25 (2021) |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 24 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 019531800000000 |