Tr 20 over Rock Creek
Good Condition29 years old50 vehicles/day
Location
| State | Illinois |
| County | McDonough |
| Location | Ctr-19-t6nr4w |
| Carries | Tr 20 |
| Crosses | Rock Creek |
| Coordinates | 40.49652, -90.89556 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very 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 | 61.4 ft (18.7 m) |
| Max Span | 60.0 ft (18.3 m) |
| Deck Width | 24.0 ft (7.3 m) |
| Deck Area | 136.5 sq m |
| Main Spans | 1 |
| Year Built | 1997 |
Traffic
| Avg Daily Traffic | 50 (2016) |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | December 2024 |
| Inspection Frequency | Every 48 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 055451300000000 |