Tr 18 over Sangamon River
Fair Condition35 years old125 vehicles/day
Location
| State | Illinois |
| County | Piatt |
| Location | 1 Mi SW Allerton Par |
| Carries | Tr 18 |
| Crosses | Sangamon River |
| Coordinates | 39.97998, -88.68405 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 511.2 ft (155.8 m) |
| Max Span | 142.1 ft (43.3 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 1417.8 sq m |
| Main Spans | 4 |
| Year Built | 1991 |
Traffic
| Avg Daily Traffic | 125 (2020) |
| Truck Traffic | 8% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 225 |
| Inspection Frequency | Every 24 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 074322500000000 |