Johnston RD (tr 28 over Corlock Branch
Good Condition27 years old100 vehicles/day
Location
| State | Illinois |
| County | Madison |
| Location | 2.5mi Semarine |
| Carries | Johnston RD (tr 28 |
| Crosses | Corlock Branch |
| Coordinates | 38.75701, -89.75080 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 51.8 ft (15.8 m) |
| Max Span | 48.9 ft (14.9 m) |
| Deck Width | 28.2 ft (8.6 m) |
| Deck Area | 135.9 sq m |
| Main Spans | 1 |
| Year Built | 1999 |
Traffic
| Avg Daily Traffic | 100 (2021) |
| Truck Traffic | 8% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 424 |
| Inspection Frequency | Every 48 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 060332400000000 |