Tr 21 over Patterson Branch
Fair Condition43 years old50 vehicles/day
Location
| State | Illinois |
| County | Massac |
| Location | 1 Mi West US RTE 45 |
| Carries | Tr 21 |
| Crosses | Patterson Branch |
| Coordinates | 37.30239, -88.87656 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 73.2 ft (22.3 m) |
| Max Span | 67.9 ft (20.7 m) |
| Deck Width | 24.3 ft (7.4 m) |
| Deck Area | 165.0 sq m |
| Main Spans | 1 |
| Year Built | 1983 |
Traffic
| Avg Daily Traffic | 50 (2020) |
| Truck Traffic | 20% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | December 2023 |
| Inspection Frequency | Every 24 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 064308500000000 |