Somonauk Road over W. Br. Big Rock Crk.
Fair Condition33 years old2,400 vehicles/day
Location
| State | Illinois |
| County | DeKalb |
| Location | 1150n 1510e |
| Carries | Somonauk Road |
| Crosses | W. Br. Big Rock Crk. |
| Coordinates | 41.79885, -88.65899 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 46.3 ft (14.1 m) |
| Max Span | 43.6 ft (13.3 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 128.3 sq m |
| Main Spans | 1 |
| Year Built | 1993 |
Traffic
| Avg Daily Traffic | 2,400 (2021) |
| Truck Traffic | 11% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 324 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 019304600000000 |