US RT 30 over Rock River
Fair Condition86 years old4,900 vehicles/day
Location
| State | Illinois |
| County | Whiteside |
| Location | 1.5 Mi W Rock Falls |
| Carries | US RT 30 |
| Crosses | Rock River |
| Coordinates | 41.77234, -89.74634 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 1097.4 ft (334.5 m) |
| Max Span | 142.7 ft (43.5 m) |
| Deck Width | 43.3 ft (13.2 m) |
| Deck Area | 4415.4 sq m |
| Main Spans | 8 |
| Year Built | 1940 (reconstructed 1990) |
Traffic
| Avg Daily Traffic | 4,900 (2023) |
| Truck Traffic | 13% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 923 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 098003400000000 |