Chicago RD over Somonauk Creek
Fair Condition80 years old1,550 vehicles/day
Location
| State | Illinois |
| County | DeKalb |
| Location | 550n 1405e |
| Carries | Chicago RD |
| Crosses | Somonauk Creek |
| Coordinates | 41.70967, -88.68001 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 120.1 ft (36.6 m) |
| Max Span | 56.4 ft (17.2 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 333.1 sq m |
| Main Spans | 2 |
| Year Built | 1946 (reconstructed 1995) |
Traffic
| Avg Daily Traffic | 1,550 (2021) |
| Truck Traffic | 12% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 123 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 019301200000000 |