Knob Prairie RD over Unnamed Creek
Good Condition10 years old20 vehicles/day
Location
| State | Illinois |
| County | Franklin |
| Location | 4.6 Mi S. Of Ill. 14 |
| Carries | Knob Prairie RD |
| Crosses | Unnamed Creek |
| Coordinates | 37.99863, -88.76523 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 9 (Excellent) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 36.4 ft (11.1 m) |
| Max Span | 33.8 ft (10.3 m) |
| Deck Width | 24.0 ft (7.3 m) |
| Deck Area | 81.0 sq m |
| Main Spans | 1 |
| Year Built | 2016 |
Traffic
| Avg Daily Traffic | 20 (2024) |
| Truck Traffic | 15% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 322 |
| Inspection Frequency | Every 48 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 028341700000000 |