Tr-239 over Harper Creek
Fair Condition37 years old100 vehicles/day
Location
| State | Illinois |
| County | Jefferson |
| Location | 1 Mi NW Mt Vernon |
| Carries | Tr-239 |
| Crosses | Harper Creek |
| Coordinates | 38.34429, -88.97867 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 76.8 ft (23.4 m) |
| Max Span | 24.9 ft (7.6 m) |
| Deck Width | 24.3 ft (7.4 m) |
| Deck Area | 173.2 sq m |
| Main Spans | 3 |
| Year Built | 1989 |
Traffic
| Avg Daily Traffic | 100 (2021) |
| Truck Traffic | 11% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | December 2024 |
| Inspection Frequency | Every 24 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 041366300000000 |