30th Street over Cedar Creek
Good Condition25 years old1,800 vehicles/day
Location
| State | Illinois |
| County | Adams |
| Location | 0.5 Mi N E Quincy |
| Carries | 30th Street |
| Crosses | Cedar Creek |
| Coordinates | 39.96165, -91.36749 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 112.2 ft (34.2 m) |
| Max Span | 59.4 ft (18.1 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 311.2 sq m |
| Main Spans | 2 |
| Year Built | 2001 |
Traffic
| Avg Daily Traffic | 1,800 (2024) |
| Truck Traffic | 9% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 48 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 001333200000000 |