Tr 171 over SW Mason City Ditch
Fair Condition43 years old175 vehicles/day
Location
| State | Illinois |
| County | Mason |
| Location | 1.5m SW Mason City |
| Carries | Tr 171 |
| Crosses | SW Mason City Ditch |
| Coordinates | 40.17863, -89.72246 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 29.9 ft (9.1 m) |
| Max Span | 27.6 ft (8.4 m) |
| Deck Width | 26.2 ft (8 m) |
| Deck Area | 72.8 sq m |
| Main Spans | 1 |
| Year Built | 1983 |
Traffic
| Avg Daily Traffic | 175 (2024) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 125 |
| Inspection Frequency | Every 24 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 063420300000000 |