Tr 20 over Rocky Run Diversion
Good Condition42 years old100 vehicles/day
Location
| State | Illinois |
| County | Adams |
| Location | 2.6 Mi NW Marceline |
| Carries | Tr 20 |
| Crosses | Rocky Run Diversion |
| Coordinates | 40.14047, -91.41074 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 122.0 ft (37.2 m) |
| Max Span | 49.9 ft (15.2 m) |
| Deck Width | 24.0 ft (7.3 m) |
| Deck Area | 271.6 sq m |
| Main Spans | 3 |
| Year Built | 1984 |
Traffic
| Avg Daily Traffic | 100 (2024) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 122 |
| Inspection Frequency | Every 48 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 001329200000000 |